CN102664504A - Polyphase permanent magnet motor with leakage reactance adjustable structure - Google Patents

Abstract

The invention relates to a multiphase permanent magnet motor with an adjustable leakage reactance structure, which belongs to the technical field of motors. The motor can be either a cylindrical rotary motor or a flat linear motor. The air gap side of the stator core is a smooth surface, and the other side of the stator core is provided with core slots along the axial direction. The surface of the stator is evenly distributed with multiple core slots. The air gap side of the iron core is fixed with a coil frame, and the coil frame is evenly distributed along the circumferential direction with a plurality of coil slots, and the plurality of coil slots correspond to the plurality of stator slots one by one, and the center of the corresponding coil slot and the core slot The wires are located on the same radius, one effective side of the coil of the armature winding is embedded in the wire slot, and the other effective side of the coil is embedded in the stator slot corresponding to the wire slot, and the stator slot is an open slot, a closed slot or Half open slot. The invention has the advantages of high winding precision, good insulation properties, short ends, high efficiency and small torque fluctuation.

Description

Multiphase Permanent Magnet Motor with Adjustable Leakage Reactance Structure

technical field

The invention relates to a multiphase permanent magnet motor with an adjustable leakage reactance structure, belonging to the field of motors.

Background technique

The permanent magnet brushless motor with slotless structure integrates permanent magnet, brushless and slotless, which fundamentally solves the problem of low output, large torque fluctuation, large hysteresis and eddy current loss, magnetic saturation, Problems such as loud noise, low efficiency and slow response. Through the use of permanent magnet excitation, the excitation coil on the rotor is eliminated, which is highly efficient and energy-saving; the brushless structure realizes no brush, no commutator, no spark, and high power-to-weight ratio; the slotless structure has a large space for winding distribution and heat dissipation Good, the armature copper loss is small, the iron core is not saturated, the iron loss (eddy current, hysteresis loss) is small, the cogging effect is eliminated, the cogging torque fluctuation is eliminated, the armature winding inductance is small, the system response is fast, and the slotless winding structure Large air gap can greatly reduce the influence of armature reaction, so that the motor has the characteristics of stable operation, strong overload capacity, low noise and reliable operation.

FIG. 14 is a schematic structural view of a conventional slotless permanent magnet synchronous motor. The motor has a structure of 8 poles and 6 coils, the winding is a concentrated fractional slot winding, and the 6 coils are evenly distributed on the inner surface of the cylindrical stator core. The advantage of the winding is that the ends do not overlap, so the ends of the winding are short, the insulation property is good, the process of the motor is simple, and the manufacture is easy. However, the reactance of the slotless permanent magnet motor with this structure is small and cannot be adjusted. When driven by a PWM power amplifier, the current harmonics are large, so the torque fluctuation of the motor is large; in order to reduce the current harmonics, it is necessary to combine the winding and power Inductors are connected in series between the amplifiers, resulting in high cost, large volume, and low reliability of the system; the winding fixing process is complicated, high cost, large winding loss, high temperature, large equivalent air gap of the motor, and low torque density.

Contents of the invention

In order to solve the problems of large volume, complex process, large winding loss and low torque density in the existing slotless permanent magnet motor, the present invention proposes a multiphase permanent magnet motor with adjustable leakage reactance.

The present invention provides the multi-phase permanent magnet motor with adjustable leakage reactance structure of the following four structures:

The first structure:

A multiphase permanent magnet motor with adjustable leakage reactance, the permanent magnet motor is a cylindrical rotary motor, which includes a stator and a rotor, an air gap between the rotor and the stator, and the stator includes a stator core, a stator winding and a casing, The stator also includes a coil bobbin, the stator core is circular, the inner surface of the stator core is smooth, and the outer surface of the stator core is axially opened with slots, and the through slots are stator core slots. The outer surface is evenly distributed along the circumference with km core slots, and the coil frame is installed on the inner wall of the stator core. The coil frame is composed of a thin-walled tube and km thin partitions, where k is a natural number, and m is the phase number of the stator winding ,. The thin partitions are strip-shaped, and the km thin partitions are radially fixed on the inside of the thin-walled cylinder. The plane where each thin partition is located is parallel to the axial direction of the motor, and a gap is formed between two adjacent thin partitions. The outer wall of the thin-walled cylinder is fixed on the inner surface of the stator core; the armature winding is composed of km coils, one effective edge of each coil is axially embedded in a slot of the coil frame, and the other effective The side is embedded in the iron core slot radially corresponding to the wire slot, and the stator winding is potted with epoxy resin

The second structure:

A multiphase permanent magnet motor with adjustable leakage reactance, the permanent magnet motor is a cylindrical rotary motor, which includes a stator and a rotor, an air gap between the rotor and the stator, and the stator includes a stator core, a stator winding and a casing, The stator also includes a coil bobbin, the stator core is circular, the inner surface of the stator core is smooth, and the outer surface of the stator core is axially opened with slots, and the through slots are stator core slots. The outer surface is evenly distributed along the circumference with km core slots, and the coil frame is installed on the inner wall of the stator core. The coil frame is composed of a thin-walled tube and km thin partitions, where k is a natural number, and m is the phase number of the stator winding , the thin partitions are strip-shaped, km thin partitions are radially fixed on the inner side of the thin-walled tube, the plane where each thin partition is located is parallel to the motor axis, and two adjacent thin partitions form a A wire slot, the outer wall of the thin-walled cylinder is fixed on the inner surface of the stator core; the armature winding is composed of km pairs of coils, and one effective edge of each pair of coils is axially embedded in a wire slot of the coil skeleton, and the other The effective side is embedded in the iron core slot radially corresponding to the wire slot, one of the coils is located at the bottom of the slot, and the other coil is located at its upper part, and the cross-section of each pair of coils is a section of a ring, and the cross-section is perpendicular to In the axial direction of the motor, the cross-sectional areas of the two coils in the pair of coils are equal, and the coil at the bottom is close to the left slot wall, and the coil at the top is close to the right slot wall. The pair of coils do not belong to the same phase, but are adjacent to each other. Two adjacent coils in the slot belong to the same phase, and the stator winding is potted with epoxy resin.

The third structure:

A multiphase permanent magnet motor with adjustable leakage reactance, the permanent magnet motor is a cylindrical rotary motor, which includes a stator and a rotor, an air gap between the rotor and the stator, and the stator includes a stator core, a stator winding and a casing, The stator also includes a coil bobbin, the stator core is circular, the inner surface of the stator core is smooth, and the outer surface of the stator core is axially opened with slots, and the through slots are stator core slots. There are 2km iron core slots evenly distributed along the outer surface along the circumference, and the coil bobbin is installed on the inner wall of the stator core. The coil bobbin is composed of a thin-walled tube and 2km thin partitions, where k is a natural number and m is the phase number of the stator winding , the thin partitions are strip-shaped, 2km thin partitions are radially fixed on the inner side of the thin-walled cylinder, the plane where each thin partition is located is parallel to the motor axis, and two adjacent thin partitions form a A slot, the outer wall of the thin-walled cylinder is fixed on the inner surface of the stator core; the armature winding includes multiple coils with 2N turns and multiple coils with N turns, where N is not 0 Natural number, q=2k/2p, p is the number of pole pairs of the motor; the first, (q+1), (2q+1), (3q+1), ..., (2km -1) The effective sides of two coils with N turns are embedded in one wire slot, and the other two effective sides of the two coils with N turns are embedded in the iron core slot radially corresponding to the wire slot , the coil sides of the two coils with N turns belong to different phases respectively; the effective sides of the coils with 2N turns are embedded in the remaining slots; at the position corresponding to the same pole, the first slot The lower coil or the upper coil, the coil in the second slot, ..., the coil in the qth slot, the upper coil or the lower coil in the (q+1)th slot are connected in series to form a coil belonging to the same phase The first pole phase winding, the pole phase windings belonging to the same phase are connected in series or in parallel to form a phase winding; the stator winding is potted with epoxy resin

The fourth structure:

A multi-phase permanent magnet motor with adjustable leakage reactance, the permanent magnet motor linear motor, which includes a primary and a secondary, an air gap between the primary and the secondary; the primary includes a primary iron core, a primary winding and a thrust output plate, It is characterized in that it also includes a coil bobbin, the primary iron core is in the shape of a flat plate, the air gap side of the primary iron core is a smooth plane, and the side surface of the primary iron core facing away from the air gap is provided with a through groove along the transverse direction, and the through groove is Core slots, on the surface of the primary core, there are km core slots evenly distributed along the relative movement direction of the primary and secondary, k is a natural number, m is the number of winding phases; the coil skeleton is composed of a thin plate and km+1 thin partitions, the thin plate One side of the thin plate is fixed on the air gap side surface of the armature core, and the other side of the thin plate is fixed with km+1 thin partitions, and the km+1 thin partitions are parallel to each other and along the relative movement direction of the primary and secondary Evenly distributed, wire slots are formed between two adjacent thin partitions, and the km wire slots correspond to the km core slots respectively; the primary winding is composed of km coils, and an effective side of each coil is embedded in a wire slot The other effective side is embedded in the iron core slot corresponding to the line slot; the slotted side of the primary iron core is fixed on the thrust output plate. The multiphase permanent magnet motor with adjustable leakage reactance structure according to claim 1, wherein the material of the coil frame is an insulating non-metallic material

The polyphase permanent magnet motor with adjustable leakage reactance structure according to the present invention has the following characteristics:

(1) By optimizing and adjusting the groove shape of the back of the iron core, the leakage reactance of the motor can be determined according to the requirements of the drive system, so that the optimal harmonic suppression of the winding current can be achieved, which can not only reduce the torque fluctuation of the motor, but also reduce the copper loss and Rotor eddy current loss, improve motor efficiency;

(2) Since half of the effective side of the winding is embedded in the back slot of the iron core, the equivalent air gap of the motor is small, the air gap flux density is high, and the torque density and power density of the motor are large;

(3) Since there is no cogging on the air gap side of the stator core, the positioning torque is eliminated and the torque fluctuation of the motor is reduced;

(4) Since the coil is wound on the iron core, the structural strength and slot fullness of the winding are high, and the positioning accuracy of the winding is good;

(5) Since there is no overlap between the coils, the insulation of the winding is easy and the reliability is high; the end of the winding is short, and the winding resistance and winding copper loss are low;

(6) Forced air cooling or liquid cooling technology can be used to directly cool the coil side in the back slot of the stator core, so the cooling effect is good, the temperature rise of the motor is low, and the service life is long.

Description of drawings

Fig. 1 is a structural schematic diagram of a polyphase permanent magnet motor with an adjustable leakage reactance structure described in the first embodiment. Fig. 2 is a schematic structural view of the permanent magnet motor shown in Fig. 1 after removing the casing. Fig. 3 is a structural schematic diagram of a multi-phase permanent magnet motor with an open slot structure and an adjustable leakage reactance structure according to the first embodiment. Fig. 4 is a structural schematic diagram of a multi-phase permanent magnet motor with a semi-open slot structure and an adjustable leakage reactance structure according to the first embodiment. Fig. 5 is a schematic structural view of a permanent magnet motor according to the first embodiment after the stator core and the coil frame are assembled. Fig. 6 is a structural schematic diagram of a multi-phase permanent magnet motor with an adjustable leakage reactance structure described in the second embodiment. Fig. 7 is a structural schematic diagram of a multi-phase permanent magnet motor with an adjustable leakage reactance structure described in the third embodiment. Fig. 8 is a structural schematic diagram of the motor shown in Fig. 7 after removing the housing. Fig. 9 is a structural schematic diagram of a polyphase permanent magnet motor with an adjustable leakage reactance structure described in the third embodiment. Fig. 10 is a structural schematic diagram of a polyphase permanent magnet motor with an adjustable leakage reactance structure described in the third embodiment. Fig. 11 is a schematic diagram of the segmented structure of the motor stator described in Embodiment 1, 2 or 3. FIG. 12 is a schematic structural view of a flat-plate linear motor with a moving secondary described in Embodiment 7. FIG. FIG. 13 is a schematic structural view of a flat-plate linear motor with a moving primary described in Embodiment 7. FIG. Fig. 14 is a structural schematic diagram of a conventional slotless permanent magnet synchronous motor.

Detailed ways

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1. Referring to Figs. 1 to 5, this embodiment will be described. A multi-phase permanent magnet motor with adjustable leakage reactance described in this embodiment is a cylindrical rotary motor, which includes a stator and a rotor, an air gap between the rotor and the stator, and the stator includes a stator core 1, a stator winding And the casing 2, the stator also includes a coil bobbin 3, the stator core is circular, the inner surface of the stator core is smooth, and the outer surface of the stator core is opened in the axial direction, and the through slot is the stator core Slot 1-1, there are km core slots evenly distributed along the circumference on the outer surface of the stator core, a coil frame 3 is installed on the inner wall of the stator core, and the coil frame consists of a thin-walled tube 3-1 and km thin partitions 3- 2, where k is a natural number and m is the phase number of the stator winding. The thin partitions 3-2 are elongated, and km thin partitions 3-2 are radially fixed on the inner side of the thin-walled cylinder 3-1, and the plane where each thin partition 3-2 is located is parallel to the motor axis, A wire slot 3-3 is formed between two adjacent thin partitions, and the outer wall of the thin-walled cylinder 3-1 is fixed on the inner surface of the stator core; the armature winding is composed of km coils, one of each coil The effective edge is axially embedded in a wire slot 3-3 of the coil frame 3, and the other effective edge is embedded in the iron core slot 1-1 radially corresponding to the wire slot. The stator winding is made of epoxy resin Fill 4 seals.

In this embodiment, the km core slots are in one-to-one correspondence with the km wire slots, and the centerlines of the corresponding core slots and the wire slots are located on the same radius.

When km=12, the permanent magnet motor described in this embodiment is shown in FIGS. 1 and 2 .

Specific Embodiment 2. Referring to FIGS. 6 and 7, this embodiment will be described. The multi-phase permanent magnet motor with adjustable leakage reactance described in this embodiment is a cylindrical rotary motor, which includes a stator and a rotor. There is an air gap between the rotor and the stator. The stator includes a stator core 1, a stator winding and a motor. Shell 2, the stator also includes a coil bobbin 3, the stator core is circular, the inner surface of the stator core is smooth, and the outer surface of the stator core is axially opened with slots, and the slots are stator core slots 1 -1, there are km core slots evenly distributed along the circumference on the outer surface of the stator core, and the coil frame 3 is installed on the inner wall of the stator core, and the coil frame is composed of a thin-walled tube 3-1 and km thin partitions 3-2 , wherein, k is a natural number, m is the phase number of the stator winding, the thin partitions 3-2 are elongated, and km thin partitions 3-2 are radially fixed on the inside of the thin-walled tube 3-1, each The plane where two thin partitions 3-2 are located is parallel to the axial direction of the motor, a wire groove 3-3 is formed between two adjacent thin partitions, and the outer wall of the thin-walled cylinder 3-1 is fixed on the inner surface of the stator core ; The armature winding is composed of km pairs of coils, one effective edge of each pair of coils is axially embedded in a wire slot 3-3 of the bobbin 3, and the other effective edge is embedded in an iron slot radially corresponding to the wire slot. In the core slot 1-1, one of the coils is located at the bottom of the slot, and the other coil is located at its upper part. The cross section of each pair of coils is a section of a ring, and the cross section is perpendicular to the motor axis. Two of the pair of coils The cross-sectional areas of the coils are equal, and the coil at the bottom is close to the left slot wall, and the coil at the top is close to the right slot wall. The pair of coils do not belong to the same phase, and the two adjacent coils are located in adjacent slots. Belonging to the same phase, the stator windings are potted with epoxy resin.

In this embodiment, the km core slots are in one-to-one correspondence with the km wire slots, and the centerlines of the corresponding core slots and the wire slots are located on the same radius.

When km=12, the permanent magnet motor described in this embodiment is shown in FIGS. 6 and 7 .

Specific Embodiment 3. Referring to FIGS. 7 , 8 , 9 and 10 , this embodiment will be described. The multi-phase permanent magnet motor with adjustable leakage reactance described in this embodiment is a cylindrical rotary motor, which includes a stator and a rotor. There is an air gap between the rotor and the stator. The stator includes a stator core 1, a stator winding and a motor. Shell 2, the stator also includes a coil bobbin 3, the stator core is circular, the inner surface of the stator core is smooth, and the outer surface of the stator core is axially opened with slots, and the slots are stator core slots 1 -1, there are 2km core slots evenly distributed along the circumference on the outer surface of the stator core, and the coil frame 3 is installed on the inner wall of the stator core, and the coil frame is composed of a thin-walled tube 3-1 and 2km thin partitions 3-2 , wherein, k is a natural number, m is the phase number of the stator winding, the thin partitions 3-2 are elongated, and 2km thin partitions 3-2 are radially fixed on the inside of the thin-walled tube 3-1, each The plane where two thin partitions 3-2 are located is parallel to the axial direction of the motor, a wire groove 3-3 is formed between two adjacent thin partitions, and the outer wall of the thin-walled cylinder 3-1 is fixed on the inner surface of the stator core ;The armature winding includes multiple coils with 2N turns and multiple coils with N turns, where N is a natural number other than 0, q=2k/2p, and p is the number of pole pairs of the motor; the first There are two effective sides of coils with N turns embedded in the 1st, q+1th, 2q+1th, 3q+1th, ..., 2km-1th slots, the two turns The other two effective sides of the N coil are embedded in the iron core slot radially corresponding to the wire slot, and the coil sides of the two coils with N turns belong to different phases; the rest of the wire slots are embedded There is an effective side of a coil with a number of turns of 2N; at the position corresponding to the same pole, the lower coil or upper coil in the first slot, the coil in the second slot, ..., the coil in the qth slot The coil, the upper layer coil or the lower layer coil in the q+1th wire slot are connected in series to form the first pole phase winding belonging to the same phase, and the pole phase windings belonging to the same phase are connected in series or in parallel to form a phase winding; the stator winding is used Epoxy potting.

The armature winding in this embodiment determines the winding connection relationship of each phase according to the principle of the electrical angle difference (360°/m) between the windings of each phase.

In the position corresponding to the same pole described in this embodiment, the lower layer coil or the upper layer coil in the first wire slot, the coil in the second wire slot, ..., the coil in the qth wire slot, the qth wire slot The meaning of the first pole phase winding belonging to the same phase is that the upper layer coil or the lower layer coil in the first wire slot is connected in series to form: under the first pole, the lower layer coil or the upper layer coil in the first coil skeleton slot, the first pole phase winding 2 coils, ..., the qth coil, the upper layer coil or the lower layer coil in the q+1th slot belong to the same phase, for example, it is the A phase, and the coils under the first pole are connected in series to form the first phase of the A phase One pole phase group, and so on, can obtain the A phase phase groups under the other poles, and the A phase winding can be obtained by connecting the A phase phase groups in series or in parallel. According to the principle of the phase difference (360°/m) electrical angle between the windings of each phase, the connection relationship of the windings of the remaining phases can be obtained.

The 2km core slots in this embodiment correspond to the 2km wire slots one by one, and the centerlines of the corresponding core slots and the wire slots are located on the same radius.

Figures 9 and 10 are two specific examples of this embodiment, in which the state when two coils with N turns in Figure 9 are embedded in the same slot is: one of the coils with N turns is located at the bottom of the slot, and the other On it, the contact surface of the two coils is an arc surface parallel to the surface of the casing. In Figure 10, the state of two coils with N turns embedded in the same slot is: the bottom of one of the coils is located at the bottom of the slot, one side of the coil occupies one side of the slot, and the two coils with N turns are The axial cross-section is approximately triangular, and the common line of two approximate triangles is a straight line or a sine curve segment or a cosine curve segment between 0° and 90°.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In the permanent magnet motor described in one, two or three, the rotor includes a permanent magnet and a yoke structure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the permanent magnet motor described in one, two or three, it can be an outer rotor motor or an inner rotor motor.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In the permanent magnet motor described in one, two or three, a cooling pipe for cooling is provided between the stator and the casing, and the cooling pipe can be embedded in the outer surface of the stator.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the permanent magnet motor described in one, two or three, the inner surface of the stator can also be slotted along the axial direction, thereby forming coil slots. In this way, the coil bobbin 3 may not be used.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the permanent magnet motor described in 1, 2 or 3, the stator core has a segmented circumferential structure, that is, the stator core consists of several sections of arc-shaped cores assembled into a cylindrical core along the circumferential direction, as shown in FIG. 11 .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In the permanent magnet motor described in one, two or three, the material of the casing 2 is non-magnetic material. After the winding is embedded, the armature core is installed in a cylindrical casing made of high-strength non-magnetic material, which simplifies the manufacturing process of the motor.

Specific Embodiment 4. This embodiment is a further limitation of the polyphase permanent magnet motor with an adjustable leakage reactance structure described in Specific Embodiment 3. In this embodiment, two wire grooves with N coils are embedded. and in the core slot, one of the two coils with N turns is located at the bottom of the slot, and the other is located at the top of the slot, and the two coils are closely combined and fill up the slot.

Specific Embodiment 5. This embodiment is a further limitation of the polyphase permanent magnet motor with adjustable leakage reactance structure described in Embodiment 3 or 4. In this embodiment, the two turns located in the same slot The cross-sections of the coils N have equal areas, and the plane of the cross-sections is perpendicular to the motor axis.

Embodiment 6. This embodiment is a further limitation of the polyphase permanent magnet motor with an adjustable leakage reactance structure described in Embodiment 5. In this embodiment, the number of turns of the two turns in the same wire slot is N The cross-section of the coil is part of a ring centered on the center of the motor shaft. See Figure 9.

Specific Embodiment 7. This embodiment is a further limitation of the polyphase permanent magnet motor with adjustable leakage reactance described in Embodiment 5. In this embodiment, the cross-sections of the two coils in the bobbin slot are similar to In the shape of a triangle, two similar triangles of the two coils fit together to just fill up one slot. In the shape of the similar triangle, the common side of two similar triangles can be a straight line segment, or a sine curve segment or a cosine curve segment between 0° and 90°.

Embodiment 8. Referring to FIGS. 12 and 13 , this embodiment will be described. The multiphase permanent magnet motor with adjustable leakage reactance described in this embodiment is a linear motor, which includes a primary and a secondary, and an air gap between the primary and secondary; the primary includes a primary iron core, a primary winding and a thrust output plate, which also includes a coil bobbin, the primary iron core is in the shape of a flat plate, the air gap side of the primary iron core is a smooth plane, and the side surface of the primary iron core facing away from the air gap is provided with a through slot along the transverse direction, and the through slot is a core slot , there are km core slots evenly distributed on the surface of the primary core along the direction of primary and secondary relative movement, k is a natural number, m is the number of winding phases; the coil skeleton is composed of a thin plate and km+1 thin separators, one side of the thin plate It is fixed on the air gap side surface of the armature core, and the other side of the thin plate is fixed with km+1 thin partitions, and the km+1 thin partitions are parallel to each other and evenly distributed along the relative movement direction of the primary and secondary , a wire slot is formed between two adjacent thin partitions, and the km wire slots correspond to the km core slots respectively; the primary winding is composed of km coils, and an effective side of each coil is embedded in a wire slot, The other effective side is embedded in the iron core slot corresponding to the line slot; the slotted side of the primary iron core is fixed on the thrust output plate. The multiphase permanent magnet motor with adjustable leakage reactance structure according to claim 1, characterized in that the material of the coil frame is an insulating non-metallic material.

In this embodiment, the thrust output plate is made of non-magnetic material.

Embodiment 9. This embodiment is a further limitation of the multi-phase permanent magnet motor with adjustable leakage reactance described in Embodiment 7. In this embodiment, the motor has a structure of a moving primary or a moving secondary.

Specific Embodiments Ten. This embodiment is a further limitation of the polyphase permanent magnet motor with an adjustable leakage reactance structure described in Embodiments 1, 2, 3 or 7. In this embodiment, the stator core slot 1- 1. The groove type is open groove, closed groove or semi-open groove.

In practical applications, the leakage reactance of the motor can be changed by setting the slot type of the iron core slot 1-1. For example, when an open slot is used, the leakage reactance of the motor is relatively small. When the leakage reactance is relatively large, the iron core can be The groove type of the groove is changed to a semi-open groove, and when the form of a closed groove is adopted, the leakage reactance is the largest.

Specific Embodiments Eleven. This embodiment is a further limitation of the polyphase permanent magnet motor with adjustable leakage reactance structure described in Embodiments 1, 2, 3 or 7. In this embodiment, the nail core groove The groove type of 1-1 is an open groove or a semi-closed groove, and the opening of each iron core groove 1-1 is poured and sealed with magnetic powder mixed with epoxy resin.

In this embodiment, epoxy resin mixed with magnetic powder is filled in the iron core slot to achieve the purpose of adjusting the leakage flux in the slot, that is, the leakage flux in the slot can be changed by adjusting the content of the magnetic powder, and then the leakage flux can be adjusted. anti. For example: the more the content of magnetic powder, the smaller the leakage reactance. In this embodiment, only the magnetic powder can be used to fill the core slots.

The multi-phase permanent magnet motor scheme with adjustable leakage reactance proposed by the present invention is suitable for both integer slot windings and fractional slot windings, both for normal conduction windings and superconducting windings, for motors, It is also suitable for generators, not only for surface permanent magnet rotors, but also for embedded permanent magnet rotors and Halbach permanent magnet rotors, and for both unilateral primary linear motors and bilateral primary linear motors.

Claims (10)

1. leakage reactance can be adjusted the multi-phase permanent motor of structure, and this magneto is the cylinder electric rotating machine, and it comprises stator and rotor; Be air gap between said rotor and the stator, stator comprises stator core (1), stator winding and casing (2), it is characterized in that; Said stator also comprises coil rack (3), and said stator core is an annular, and the inner surface of stator core is smooth; The outer surface of said stator core is opened groove vertically, and this groove is stator core slot (1-1), is evenly distributed with km core slots at the outer surface of stator core along circumference; Hookup wire ring framework (3) on the inwall of stator core, coil rack is made up of a thin wall cylinder (3-1) and km way-board (3-2), wherein; K is a natural number, and m is the number of phases of stator winding.Said way-board (3-2) is a strip; Km way-board (3-2) is fixed on thin wall cylinder (3-1) inboard radially; Each way-board (3-2) plane, place and motor axially parallel; Form a wire casing (3-3) between two adjacent way-boards, the lateral wall of thin wall cylinder (3-1) is fixed on the inner surface of stator core; Armature winding is made up of km coil; An effective edge of each coil is embedded in the wire casing (3-3) of coil rack (3) vertically; Another effective edge embeds in the iron core slot radially corresponding with this wire casing (1-1), and said stator winding is used the epoxy resin embedding.

2. leakage reactance can be adjusted the multi-phase permanent motor of structure, and this magneto is the cylinder electric rotating machine, and it comprises stator and rotor; Be air gap between said rotor and the stator, stator comprises stator core (1), stator winding and casing (2), it is characterized in that; Said stator also comprises coil rack (3), and said stator core is an annular, and the inner surface of stator core is smooth; The outer surface of said stator core is opened groove vertically, and this groove is stator core slot (1-1), is evenly distributed with km core slots at the outer surface of stator core along circumference; Hookup wire ring framework (3) on the inwall of stator core, coil rack is made up of a thin wall cylinder (3-1) and km way-board (3-2), wherein; K is a natural number, and m is the number of phases of stator winding, and said way-board (3-2) is a strip; Km way-board (3-2) is fixed on thin wall cylinder (3-1) inboard radially; Each way-board (3-2) plane, place and motor axially parallel form a wire casing (3-3) between two adjacent way-boards, the lateral wall of thin wall cylinder (3-1) is fixed on the inner surface of stator core; Armature winding is made up of coil km, and an effective edge of every pair of coil is embedded in the wire casing (3-3) of coil rack (3) vertically, and another effective edge embeds in the iron core slot radially corresponding with this wire casing (1-1); One of them coil is positioned at trench bottom; Another coil is positioned at its top, and the cross section of every pair of coil is a section of annulus, said cross section perpendicular to motor shaft to; This area to the cross section of two coils in the coil equates; And be positioned at the coil next-door neighbour left side cell wall of bottom, be positioned at the coil next-door neighbour right side cell wall at top, this does not belong to same phase to coil; Be positioned at adjacent wire casing and two adjacent coils belong to same phase, said stator winding is used the epoxy resin embedding.

3. leakage reactance can be adjusted the multi-phase permanent motor of structure, and this magneto is the cylinder electric rotating machine, and it comprises stator and rotor; Be air gap between said rotor and the stator, stator comprises stator core (1), stator winding and casing (2), it is characterized in that; Said stator also comprises coil rack (3), and said stator core is an annular, and the inner surface of stator core is smooth; The outer surface of said stator core is opened groove vertically, and this groove is stator core slot (1-1), is evenly distributed with 2km core slots at the outer surface of stator core along circumference; Hookup wire ring framework (3) on the inwall of stator core, coil rack is made up of a thin wall cylinder (3-1) and 2km way-board (3-2), wherein; K is a natural number, and m is the number of phases of stator winding, and said way-board (3-2) is a strip; 2km way-board (3-2) is fixed on thin wall cylinder (3-1) inboard radially; Each way-board (3-2) plane, place and motor axially parallel form a wire casing (3-3) between two adjacent way-boards, the lateral wall of thin wall cylinder (3-1) is fixed on the inner surface of stator core; Including coil and a plurality of number of turn that a plurality of numbers of turn are 2N in the armature winding is the coil of N, and wherein N is not 0 natural number, and q=2k/2p, p are the number of pole-pairs of motor; The 1st, q+1,2q+1,3q+1 ..., embed that two numbers of turn are arranged is the effective edge of the coil of N in the 2km-1 wire casing; In addition two effective edges of the coil that these two numbers of turn are N embed with the radially corresponding core slots of this wire casing in, the coil side of the coil that these two numbers of turn are N belongs to different phases respectively; Embed all in remaining wire casing that the number of turn is arranged is the effective edge of the coil of 2N; In same extremely corresponding position; Coil in inner coil in the 1st wire casing or upper coil, the 2nd wire casing ..., the coil in the q wire casing, the upper coil in the q+1 wire casing or inner coil series connection constitute first utmost point phase winding that belongs to same phase, the utmost point phase winding serial or parallel connection that will belong to same phase is formed a phase winding; Said stator winding is used the epoxy resin embedding.

4. leakage reactance according to claim 3 can be adjusted the multi-phase permanent motor of structure; It is characterized in that; In the wire casing and core slots of the coil that it is N that embedding has two numbers of turn; A coil in the coil that said two numbers of turn are N is positioned at wire casing bottom, and another is positioned at the top of wire casing, and two coils are combined closely and filled full place wire casing.

Can adjust the multi-phase permanent motor of structure according to claim 3 or 4 described leakage reactances, it is characterized in that, the area of the cross section of the coil that two numbers of turn that are arranged in same wire casing are N equates, plane, said cross section place perpendicular to motor shaft to.

5. can adjust the multi-phase permanent motor of structure according to claim 1,2 or 3 described leakage reactances, it is characterized in that, be provided with the cooling water pipe that is used to cool off between stator and the casing.

6. can adjust the multi-phase permanent motor of structure according to claim 1,2 or 3 described leakage reactances, it is characterized in that stator core is the circumferential sectors structure.

7. leakage reactance can be adjusted the multi-phase permanent motor of structure, these magneto linear electric motors, and it comprises primary and secondary, is air gap between the said primary and secondary; Elementary elementary iron core, elementary winding and the thrust output board of comprising is characterized in that it also comprises coil rack; Said elementary iron core is plate shaped, and the air gap side of elementary iron core is a smooth flat, and the air gap side surface edge that deviates from of said elementary iron core laterally has groove; Said groove is a core slots; Surface at elementary iron core is evenly distributed with km core slots along the primary and secondary direction of relative movement, and k is a natural number, and m is the winding number of phases; Coil rack is made up of a thin plate and km+1 way-board; The one side of thin plate is fixed on the air gap side surface of armature core; The another side of said thin plate is km+1 way-board fixedly; A said km+1 way-board is parallel to each other and evenly distributes along the primary and secondary direction of relative movement, forms wire casing between adjacent two way-boards, and a said km wire casing is corresponding with km core slots respectively; Elementary winding is made up of km coil, and effective edge of each coil embeds in the wire casing, its another effective edge be embedded in the corresponding core slots of this wire casing in; The fluting side of said elementary iron core is fixed on the thrust output board.

8. leakage reactance according to claim 1 can be adjusted the multi-phase permanent motor of structure, it is characterized in that, the material of said coil rack is the nonmetallic materials of insulation.

9. leakage reactance according to claim 7 can be adjusted the multi-phase permanent motor of structure, it is characterized in that, said motor is moving elementary or moving secondary structure.

10. can adjust the multi-phase permanent motor of structure according to claim 1,2,3 or 7 described leakage reactances, it is characterized in that, confuse poured with epoxy resin by Magnaglo in said each iron core slot (1-1) and fill.

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