KR101140222B1 - Pole change type synchronous motor - Google Patents

Abstract

The present invention relates to a pole-conversion synchronous motor, the stator 110 is a motor coil 112 is wound on the teeth 111 arranged in a plurality, and the plurality of conductors 122 is installed to rotate from the stator 110 It is adjacent to each other between the installed rotor 120, the magnet layer 130 is formed to have a gap with the tooth 111 in the rotor 120 and made of a magnetic material capable of remagnetization, and the tooth 111 of the stator 110 By including the exciting pole 140 is provided to face the magnet layer 130 and the female coil 141 is wound, respectively, the stator 110 including the tooth 111 and the exciting pole 140 is soft magnetic composite (soft magnetic composite) is characterized in that. Therefore, the present invention has the effect that the magnetic flux is uniformly distributed in the magnet layer by configuring the stator or exciting pole including the exciting pole in the SMC, resulting in an improved output of the motor. In addition, it is easy to separate and assemble the exciting pawl consisting of the SMC from the stator and has an effect of improving the assemblability.

Pole-Conversion Synchronous Motor, Exciting Pole, Woman Coil, Magnet Layer, SMC

Description

Pole CHANGE TYPE SYNCHRONOUS MOTOR

1 is a cross-sectional view showing a polar conversion synchronous motor according to the prior art,

2 is a cross-sectional plan view showing a pole conversion synchronous motor according to an embodiment of the present invention,

3 is a perspective view of a part of the polar conversion synchronous motor according to the embodiment of FIG.

Figure 4 is a plan sectional view showing a polar conversion synchronous motor according to another embodiment of the present invention,

FIG. 5 is a perspective view of a part of a pole conversion synchronous motor according to another embodiment of FIG. 4. FIG.

<Description of Symbols for Main Parts of Drawings>

110: Stator 111: Tooth

112: motor coil 113: guide groove

120: rotor 121: shaft hole

122: conductor 130: magnet layer

140,150: Exciting pole 141,151: Female coil

142,152: Guide protrusion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pole conversion synchronous motor, and more particularly, to a pole conversion synchronous motor, in which magnetic flux of an excitation coil of an exciting pool is uniformly distributed in a magnet layer, thereby contributing to the output of a motor.

In general, a motor is a device that obtains rotational force by converting electrical energy into mechanical energy, and is widely used in home appliances as well as industrial equipment. The motor is largely divided into a DC motor and an AC motor.

Brushless brushless DC (BLDC) motors are used to overcome the drawbacks of brush wear, which causes current to flow in coils by contact with commutators in DC motors. These brushless DC motors have high torque and controllability. While not only this is excellent but also can be achieved quickly, the cost of using an inverter to change the direction of the current is expensive.

On the other hand, the LSPM Line Start Permanent Magnet Synchronous Motor, which is a kind of AC motor, does not use an inverter, unlike a BLDC motor, and a secondary current and a stator generated by a voltage induced in a conductor of a rotor. It is driven by the torque generated by the interaction of the magnetic flux generated by the winding of the), wherein the torque is started by the torque line segment by the cage, the combined torque of the reluctance torque and the magnet torque. In addition, the magnetic flux of the magnet installed in the rotor and the magnetic flux generated in the stator during the rated operation are synchronized with each other to operate at the speed of the stator's rotating magnetic field.

Since the LSPM synchronous motor always has magnetic flux, the magnet generates negative torque during initial startup and thus has a disadvantage of degrading the performance of the initial startup.A pole called WPM (Written Pole Motor) is used to overcome this disadvantage. Convertible synchronous motors have been developed.

When described with reference to the accompanying drawings a pole-conversion synchronous motor according to the prior art as follows.

1 is a cross-sectional view showing a polar conversion synchronous motor according to the prior art. As shown, the conventional pole-transformed synchronous motor 10 includes a stator 11 and a stator 11 in which a plurality of teeth 11b, each of which the motor coil 11a is wound, are arranged along an inner circumferential surface thereof. The rotor 12 is rotatably installed inside the rotor 11 and a plurality of conductors 12a are inserted along the edge, and the rotor 12 is provided on the outer circumferential surface of the rotor 12 to have a gap with the tooth 11b. Exciting poles are provided between the magnet layer 13 made of a remagnetizable magnetic material and the magnet layer 13 between the teeth 11b of the stator 11 and the female coil 14a is wound. pole 14).

The pole conversion synchronous motor 10 according to the related art has a primary induced voltage generated on the stator 11 side by applying power to the motor coil 11a for driving, and thus, the conductor 12a of the rotor 12. The rotor 12 rotates by generating a start torque by the interaction of the secondary induced voltage generated from the step. When the rotational speed of the rotor 12 reaches a constant speed, the AC power is supplied to the excitation coil 14a. Magnetic flux generated in the magnet layer 13 by magnetizing the magnet layer 13 so that a predetermined number of N poles and S poles are alternately formed along the circumferential direction by applying an exciting pole 14 to the magnet layer 13. The magnetic flux generated in the stator 11 is synchronized so that the rotor 12 reaches the synchronous speed.

When the rotor 12 reaches the synchronous speed, the AC power applied to the excitation coil 14a is cut off, and the magnet layer 13 maintains the magnetization state for generating the drive torque.

In the polar conversion synchronous motor 10 according to the related art, the magnet layer 13 is magnetized by magnetizing the magnet layer 13 by the exciting pole 14.

By the way, in the conventional exciting pole 14, the magnetic flux of the excitation coil 14a is often not uniformly dispersed in the magnet layer 13, so there is a problem that the output of the motor is not sufficiently exhibited. Accordingly, the uniform magnetic flux reaches the magnet layer 13 to not only have an ideal magnetization state but also to easily increase the magnetization strength of the magnet layer 13 to realize a high output and high efficiency, thereby achieving a highly converted synchronous motor 10. Development was needed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to construct a stator or exciting pole including an exciting pole as a soft magnetic composite (hereinafter referred to as "SMC") magnet layer. The magnetic flux is distributed uniformly to provide a pole conversion synchronous motor that improves the output of the motor.

In addition, another object of the present invention is to provide a pole conversion synchronous motor having improved assembly performance by facilitating the separation and assembly of the excitation pole made of SMC from the stator.

The present invention for achieving the above object is, in the pole conversion synchronous motor, a stator in which a motor coil is wound around a plurality of teeth arranged, a rotor installed so as to rotate from the stator, and a plurality of conductors are installed, and a tooth to the rotor. And a magnet layer made of a magnetic material that is installed to have a space between the magnets, and an exciting pole provided to face the magnet layer adjacent to each other between the teeth of the stator and wound with a female coil, respectively, including a tooth and an exciting pole. The stator is characterized in that it comprises a polar conversion synchronous motor, characterized in that made of soft magnetic composite (soft magnetic composite).

In addition, the present invention, in the pole-conversion synchronous motor, a stator in which a motor coil is wound around a plurality of teeth arranged, a rotor installed to rotate from the stator, and a rotor having a plurality of conductors installed therein, and the rotor has a tooth and a void The magnet layer includes a magnet layer that is installed and re-magnetizable, and an exciting pole provided between the stator tooth and adjacent to the magnet layer and wound around the magnet layer, wherein the exciting pole is a soft magnetic composite. Characterized in that it comprises a pole conversion synchronous motor, characterized in that consisting of.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

FIG. 2 is a cross-sectional plan view illustrating a pole conversion synchronous motor according to an embodiment of the present invention, FIG. 3 is a partial perspective view of the pole conversion synchronous motor according to the embodiment of FIG. 2, and FIG. 4 is another embodiment of the present invention. FIG. 5 is a cross-sectional plan view illustrating a pole conversion synchronous motor according to an embodiment, and FIG. 5 is a partial perspective view of the pole conversion synchronous motor according to another embodiment of FIG. 4.

As shown in FIGS. 2 and 3, the pole conversion synchronous motor 100 according to the present invention includes a stator 110 in which a motor coil 112 is wound around a plurality of teeth 111, and a stator 110. And a magnet layer 130 formed of a rotor 120 having a plurality of conductors 122 installed therein, a remagnetizable magnetic body installed at the rotor 120, and a magnet layer And an exciting pole 140 that magnetizes 130.

The pole-type synchronous motor 100 according to the present invention may be configured not only as an inner rotor type but also as an outer rotor type. In this embodiment, the inner rotor type will be described as an example.

Here, the stator 110 is provided such that a plurality of teeth 111 are arranged along an inner circumferential surface, and a motor coil 112 is wound around each tooth 111, and the magnet layers 130 are adjacent to each other between the teeth 111. An exciting pawl 140 is provided to face each other, and preferably the exciting pawl 140 is detachably coupled from the stator 110.

The stator 140 is formed of "SMC" having a three-dimensional shape by the compression process of the soft magnetic powder according to the characteristics of the present invention.

For reference, the soft magnetic powder of "SMC" is based on iron-based particles, each of which is coated to be electrically insulated. The soft magnetic powder is produced by filling a shape space including a tooth in a compression molding machine and then compressing the same with a compression member such as a punch.

In addition, in the stator 110 of the "SMC" material, the exciting pawl 140 is guided along the axial direction at one end of the body of the exciting pawl 140, ie, at one end of the stator 110, so as to be separated and assembled. 142 is formed, and the guide groove 113 is formed on the side of the stator 110 to face the guide protrusion 142.

Therefore, the exciting pawl 140 is slidingly coupled upward toward the guide groove 113 of the stator 110, and when separated, separation is possible in the reverse direction.

And the excitation pole 140 is the winding of the excitation coil 141 to perform the magnetization of the magnet layer 130, and preferably the excitation coil 141 is detachably coupled to the stator 110 in the winding state desirable.

And the rotor 120 is installed inside the stator 110.

The rotor 120 is fixed to a shaft (not shown) in the shaft hole 121 formed at the center thereof, and the shaft (not shown) is rotatable from the stator 110 by being coupled to a case such as a housing or a shell through a bearing. A plurality of conductors such as aluminum (Al), copper (Cu), or the like are inserted into the circumference of the shaft hole 121, and a magnet layer 130 is installed on an outer circumferential surface thereof.

The magnet layer 130 forms an integrated ring shape or a ring shape by a plurality of parts, and the tooth 111 and the air gap on the outer circumferential surface of the rotor 120 by an adhesive method, an interference fit method, or a separate coupling member. It is installed to have a magnetic material capable of remagnetization, and may be made of a hard magnetic material as well as a soft magnetic material.

The pole conversion synchronous motor 100 according to another embodiment of the present invention according to FIGS. 4 and 5 is as follows. However, the same parts as those in the above example are given the same reference numerals, and descriptions thereof are omitted.

Here, an exciting pole 150 installed between the teeth 111 of the stator 110 to magnetize the magnet layer 130 has a three-dimensional shape by a compression process of the soft magnetic powder. It is formed of "SMC".

Furthermore, the exciting pawl 150 of the "SMC" material may have a guide protrusion along the axial direction at one end of the body of the exciting pawl 150, ie, at one end facing the stator 110, so as to be separated and assembled from the stator 110. 152 is formed, and the guide groove 113 is formed on the side of the stator 110 to face the guide protrusion 152.

Therefore, the exciting pole 150 is slidingly coupled upwards toward the guide groove 113 of the stator 110, and when separated, separation is possible in the reverse direction.

The excitation pole 150 is wound with the excitation coil 151 to perform magnetization of the magnet layer 130. Preferably, the excitation coil 151 is detachably coupled to the stator 110 while the excitation coil 151 is wound.

Operation according to each embodiment of the pole conversion synchronous motor having such a structure is performed as follows.

First, in the stator 110 made of "SMC", the exciting coil 140 is wound around the outer circumferential surface of the exciting pawl 140 before the exciting pawl 140 is coupled to the stator 110.

The guide protrusion 142 of the exciting pawl 140 is inserted from the top of the stator 110 downward. At this time, the guide protrusion 142 is slidably coupled to the guide groove 113 of the stator 110.

On the other hand, the primary induced voltage generated on the stator 110 side by applying a power to the motor coil 112 wound on the tooth 111 to generate a rotating magnetic flux for driving the pole conversion synchronous motor 100, Due to the start torque generated by the interaction of the secondary induced voltage generated from the conductor 122 of the rotor 120, the rotor 120 is rotated, at this time, the magnet layer 130 is potato or demagnetized state As a result, the negative torque generated by the magnet layer 130 is not generated during the initial startup, thereby reducing the initial startup performance.

When the rotor 120 rotates to reach a constant rotation speed, for example, 75% to 80% of the synchronous speed, the excitation coil 141 is applied to the stator 110 by applying AC power for generating pulses of a pre-programmed waveform. The magnetic pole generated in the magnet layer 130 is formed by the coupled excitation pole 140, and thus the magnetic flux generated in the magnet layer 130 and the magnetic flux generated in the stator 110 are synchronized to rotate the speed of the rotor 120. Will reach the synchronous speed. When the rotor 120 reaches the synchronous speed, the AC power applied to the excitation coil 141 is cut off, and the magnet layer 130 maintains the magnetized state, thereby generating continuous driving torque.

Therefore, the stator 110 made of "SMC" is an excitable pole 140 that can be separated and assembled, thereby improving assembly performance, and the magnetic flux of the excitation coil 141 is uniformly dispersed in the magnet layer 130 so that the Contributes to improved output.

In addition, according to another embodiment, the exciting pawl 150 made of “SMC” may be similarly detached and assembled, thereby improving assembly performance, and the magnetic flux of the excitation coil 151 may be uniformly distributed in the magnet layer 130 to provide a motor. Contributes to improving the output.

What has been described above is just one embodiment for performing an excitation pole of a pole conversion synchronous motor according to the present invention, and the present invention is not limited to the above-described embodiment, as claimed in the following claims. Without departing from the gist of the invention, anyone of ordinary skill in the art to which the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

As described above, the pole-conversion synchronous motor according to the present invention, by configuring the stator or exciting pole including the excitation pole in the SMC has the effect that the magnetic flux is uniformly distributed in the magnet layer to improve the output of the motor. In addition, it is easy to separate and assemble the exciting pawl consisting of the SMC from the stator and has an effect of improving the assemblability.

Claims (6)

In the pole conversion synchronous motor, A stator in which a motor coil is wound around a tooth arranged in a plurality; A rotor installed to rotate from the stator and having a plurality of conductors installed therein; A magnet layer installed in the rotor to have a gap with the tooth and made of a magnetic material capable of remagnetization; Between the tooth of the stator is provided adjacent to each other and facing the magnet layer, and comprises an exciting pawl each winding the excitation coil, The tooth and the exciting pawl of the stator are made of a soft magnetic composite, The exciting pawl is formed so that the guide protrusion is formed on one end of the body of the exciting pawl so as to be detachably coupled from the stator, the guide groove is formed on the stator side to correspond to the guide protrusion, and is slidably separated and assembled. Pole-type synchronous motor. delete delete In the pole conversion synchronous motor, A stator in which a motor coil is wound around a tooth arranged in a plurality; A rotor installed to rotate from the stator and having a plurality of conductors installed therein; A magnet layer installed in the rotor to have a gap with the tooth and made of a magnetic material capable of remagnetization; Between the tooth of the stator is provided adjacent to each other and facing the magnet layer, and comprises an exciting pawl each winding the excitation coil, The exciting pawl is made of a soft magnetic composite, and a guide protrusion is formed at one end of the body of the exciting pawl to be detachably coupled from the stator, and a guide groove is formed at the stator side to correspond to the guide protrusion. Formed, sliding and synchronous motor, characterized in that the separation and assembly is possible. delete delete

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