CN204168022U - Brushless electromagnetism and permanent magnetism mixing excitation generator - Google Patents

Abstract

The utility model provides a brushless electromagnetic and permanent magnet hybrid excitation generator, which belongs to the technical field of automobile motors and electrical appliances. It consists of a front end cover, a rear end cover, a rotor and a stator. It is characterized in that the electric excitation rotor is a brushless claw pole structure, and the permanent magnet rotor is a radial invisible magnetic pole structure. The electric excitation rotor and the permanent magnet rotor share the same motor in parallel coaxial Armature winding, the magnetic field generated is combined in parallel in the air gap of the hybrid excitation generator. By adjusting the size and direction of the electric current of the electric excitation rotor, the magnitude of the combined magnetic field of the electric excitation magnetic field and the permanent magnetic field in the air gap of the hybrid excitation generator can be changed. , so as to ensure that the hybrid excitation generator outputs DC power with stable voltage under variable speed and variable load conditions, and provides electric energy for automotive electrical equipment.

Description

Brushless electromagnetic and permanent magnet hybrid excitation generator

technical field

The utility model provides a brushless electromagnetic and permanent magnet hybrid excitation generator, which belongs to the technical field of automobile motors and electrical appliances.

Background technique

The automobile industry is a symbol of modern industry and a leading industry in the development of the national economy. It plays an indispensable role in all aspects of industrial and agricultural production, transportation, and human production and life. At present, generators used in conjunction with automobiles are ubiquitous The low-speed lighting effect is poor, which cannot meet the user's requirements. Such as the invention patent announced in the Chinese Patent Gazette on August 8, 2001: Stabilized permanent magnet generator, application number: 00 1 12053.0, which consists of a casing, a frame, a power shaft, a rotor, a permanent magnet steel, a stator, and a stator winding , stator seat, stator sliding sleeve, balance spring, anti-rotation connecting screw, sliding block, adjusting shaft, positioning bearing, adjusting shaft driving mechanism and automatic feedback control circuit, etc. The power rotating shaft is fixed on the machine base through the positioning bearing, and the rotor It is fixed on the power rotating shaft, and one end of the stator sliding sleeve is fixed on the machine base. There is a through slot on the stator sliding sleeve along the axial direction. The balance spring is arranged in the stator sliding sleeve. Blocking, the other end pushes the sliding block placed in the stator sliding sleeve, the sliding block is fixedly connected with the stator seat by the anti-rotation connecting screw passing through the sliding sleeve slot, the center of the sliding block is threaded with one end of the adjusting shaft Actively connected, the detection signal input end of the automatic feedback control circuit is connected to the output end of the stator winding, and the control signal output end of the circuit is connected to the controlled end of the driving mechanism. The stabilized permanent magnet generator has complex structure and high cost, and its performance needs to be further improved.

Contents of the invention

The purpose of this utility model is to provide a method that can overcome the above-mentioned defects. The electric excitation winding and the permanent magnet steel are jointly excited, and the magnetic field generated is combined in parallel in the air gap of the hybrid excitation generator. By adjusting the magnitude and direction of the electric current of the electric excitation winding, Then change the magnitude of the combined magnetic field of the electric excitation magnetic field and the permanent magnet magnetic field in the air gap of the hybrid excitation generator, so as to ensure the stable output voltage of the brushless electromagnetic and permanent magnet hybrid excitation generator. The technical content is as follows:

The brushless electromagnetic and permanent magnet hybrid excitation generator is composed of a front end cover, a rear end cover, a rotor and a stator. It shares the same armature winding in parallel with the permanent magnet rotor, and the magnetic field generated is combined in parallel in the air gap of the hybrid excitation generator;

The electric excitation rotor is composed of front claw poles and rear claw poles. The front claw poles and rear claw poles are fitted on the rotating shaft with interference fit and fastened with lock nuts. The electric excitation winding gap is fitted between the front claw poles and rear claw poles On the yoke, and there is a certain gap between the front claw pole and the rear claw pole. Clearance;

The permanent magnet rotor is composed of arc-shaped permanent magnet steel, rotor iron core, pole shoes, screws, and rotating shaft. There are multiple long salient poles and short salient poles evenly distributed on the rotor iron core. The long salient poles and short salient poles are spaced apart from each other. The number is equal, the long salient pole is 4mm longer than the short salient pole, and the arc-shaped permanent magnet steel with S poles on the inner arc is fixed on the outer arc of the short salient pole of the rotor core by screws through the pole shoes. The thickness of the magnetic steel and the pole shoe are both 2mm, and the rotor core is fixed on the shaft;

The stator includes electric excitation windings, iron hoops, stator cores and armature windings, in which the annular stator core is clamped between the rear end cover and the front end cover, fixed with bolts, and the inner ring of the annular stator core is biased to one end There are multiple bumps evenly distributed on the same circumference of the armature winding. The armature winding is wound in the tooth slot of the annular stator core. One end with a protruding block inside, the electric excitation winding is fixed on the inner ring of the stator iron core through the iron hoop and the protruding block.

Working principle: The automobile engine drives the pulley of the hybrid excitation generator to rotate, that is, the rotor magnetic field rotates, and the armature winding cuts the magnetic field lines to generate electromotive force, which provides electric energy for automobile electrical equipment.

Compared with the prior art, the utility model is equipped with an electric excitation rotor and a permanent magnet rotor on the rotating shaft of the hybrid excitation generator at the same time, and the electric excitation rotor and the permanent magnet rotor share the same armature winding, and the magnetic field generated in the hybrid excitation generator Parallel combination in the air gap, by adjusting the size and direction of the electric current of the electric excitation winding, and then changing the size of the electric excitation magnetic field and the permanent magnetic field in the air gap of the hybrid excitation generator, so as to ensure that the hybrid excitation generator operates at variable speed, Output DC with stable voltage under variable load conditions to provide electric energy for automotive electrical equipment.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Figure 2 Sectional view of the permanent magnet rotor.

Detailed ways

In the embodiment: 1. Revolving shaft 2. Rear end cover 3. Front end cover 4. Electric excitation winding 5. Iron hoop 6. Stator iron core 7. Armature winding 8. Bolt 9. Bump 10. Front claw pole 11. Rear Claw pole 12, lock nut 13, pole shoe 14, screw 15, arc-shaped permanent magnet steel 16, rotor core

Below in conjunction with accompanying drawing, the utility model is further described:

The brushless electromagnetic and permanent magnet hybrid excitation generator is composed of a front end cover 3, a rear end cover 2, a rotor, and a stator. The excitation rotor and the permanent magnet rotor are coaxially connected in parallel and share the same armature winding 7, and the generated magnetic field is combined in parallel in the air gap of the hybrid excitation generator;

The electric excitation rotor is composed of front claw poles 10 and rear claw poles 11. The front claw poles 10 and rear claw poles 11 are fitted on the rotating shaft 1 with an interference fit, and are fastened with lock nuts 12. The electric excitation winding 4 is mounted on the front On the yoke of the claw pole 10 and the rear claw pole 11, and there is a certain gap between the front claw pole 10 and the rear claw pole 11, the outer ends of the front claw pole 10 and the rear claw pole 11 are separated from the movement track of the protrusion 9 There is a certain gap between the two sides and the inner ring of the stator core 6;

The permanent magnet rotor is composed of arc-shaped permanent magnet steel 15, rotor iron core 16, pole shoe 13, screw 14, and rotating shaft 1. The rotor iron core 16 is evenly distributed with a plurality of long salient poles and short salient poles, and the long salient poles and The short salient poles are spaced apart from each other and the number is equal, the long salient poles are 4mm longer than the short salient poles, and the arc-shaped permanent magnet steel 15 whose inner arc surface is all S poles is fixed on the rotor core 16 by screws 14 through the pole shoes 13 and the short salient poles On the outer arc of the arc, the thickness of the arc-shaped permanent magnet steel 15 and the thickness of the pole piece 13 are both 2 mm, and the rotor core 15 is fixed on the rotating shaft 1;

The stator includes electric excitation winding 4, ferrule 5, stator iron core 6 and armature winding 7, wherein the annular stator iron core 6 is clamped between the rear end cover 2 and the front end cover 3, and fixed with bolts 8. A plurality of projections 9 are evenly distributed on the same circumference of the inner ring of the stator core 6 biased toward one end, and the armature winding 7 is wound in the tooth slots of the annular stator core 6, and the coils constituting the electric field winding 4 are composed of multiple The iron hoop 5 is tightened, and the electric field winding 4 is set on the end of the stator core 6 with the bump 9 , and the electric field winding 4 is fixed on the inner ring of the stator core 6 through the iron hoop 5 and the bump 9 .

Claims (1)

1. a brushless electromagnetism and permanent magnetism mixing excitation generator, be made up of front end housing (3), rear end cap (2), rotor, stator, it is characterized in that: electric excitation rotor is brush-free claw-pole structure, p-m rotor is radial hidden magnetic pole structure, electricity excitation rotor and p-m rotor is in parallel coaxial shares same armature winding (7), the magnetic field of generation is in hybrid excitation generator air gap and be unified into;

Electricity excitation rotor is made up of fore paw pole (10) and rear solid end pole (11), fore paw pole (10) and rear solid end pole (11) interference fit are sleeved in rotating shaft (1), and it is fastening with locking nut (12), electricity excitation winding (4) gap is sleeved in the yoke of fore paw pole (10) and rear solid end pole (11), and and have certain gap between fore paw pole (10) and rear solid end pole (11), the both sides of outer end separation projection (9) movement locus of fore paw pole (10) and rear solid end pole (11), and and have certain gap between stator core (6) inner ring;

P-m rotor is by circular arc permanent-magnet steel (15), rotor core (16), pole shoe (13), screw (14), rotating shaft (1) forms, rotor core (16) is evenly equipped with multiple long salient pole and short salient pole, long salient pole and short salient pole spaced, quantity is equal, long salient pole 4mm longer than short salient pole, the circular arc permanent-magnet steel (15) that intrados is S pole is fixed in the external arc of rotor core (16) short salient pole by pole shoe (13) by screw (14), the thickness of circular arc permanent-magnet steel (15) and the thickness of pole shoe (13) are 2mm, rotor core (15) is fixed in rotating shaft (1),

Stator comprises electric excitation winding (4), iron hoop (5), stator core (6) and armature winding (7), wherein annular stator iron core (6) is clamped between rear end cap (2) and front end housing (3), be equipped with bolt (8) to fix, be partial to the same of one end at annular stator iron core (6) inner ring and be circumferentially evenly equipped with multiple projection (9), armature winding (7) is wrapped in the teeth groove of annular stator iron core (6), form some coils of electric excitation winding (4) by multiple iron hoop (5) banding, electricity excitation winding (4) is sleeved on the one end being provided with projection (9) in stator core (6), electricity excitation winding (4) is fixed on the inner ring of stator core (6) through iron hoop (5) and projection (9).