Axial magnetic field hybrid excitation brushless motor
A brushless motor and axial magnetic field technology, applied in the direction of magnetic circuits, electric components, electrical components, etc., can solve the problems of irreversible demagnetization of permanent magnets, difficult adjustment of air gap magnetic field, and reduced system efficiency, so as to achieve good operating characteristics and avoid Effect of demagnetization and high efficiency
Pending Publication Date: 2021-02-02
HUNAN INSTITUTE OF ENGINEERING
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Problems solved by technology
[0002] The permanent magnet synchronous motor has simple structure, reliable operation, small size, low loss and high efficiency, but it has the problem that the air gap magnetic field is difficult to adjust
When the motor is required to run in a wide speed range, it is necessary to apply a continuous direct-axis current to weaken the magnetic field, which not only reduces the efficiency of the system, but also may cause irreversible demagnetization of the permanent magnet
Method used
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[0028] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0029] For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or conf...
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The invention provides an axial magnetic field hybrid excitation brushless motor, which comprises a casing, a main power generator, an alternating current exciter and a rotary rectifying device, wherein the main power generator, the alternating current exciter and the rotary rectifying device are arranged in the casing, the main power generator comprises a rotating shaft, a permanent magnet rotordisc and an excitation rotor disc which are sleeved on the rotating shaft in a co-rotating mode, and a stator disc fixedly arranged on the casing, the stator disc comprises a stator yoke part and a stator winding, the permanent magnet rotor disc comprises a rotor yoke part II and a permanent magnet, the excitation rotor disc comprises a rotor yoke part I and an excitation winding, the rotor yoke part I, the stator yoke part and the rotor yoke part II are sequentially arranged in parallel at intervals, the alternating current exciter comprises an alternating current exciter stator and an alternating current exciter rotor, the alternating-current exciter stator is installed on the casing, and the alternating-current exciter rotor and the rotary rectifying device are installed on the rotor yoke part I. According to the hybrid excitation motor, the motor is simple and compact in structure, high in power density and high in efficiency; and the risk of demagnetization of the permanent magnetis avoided, and a collecting ring and an electric brush are cancelled.
Description
technical field [0001] The invention belongs to the technical field of motor field, in particular to an axial magnetic field hybrid excitation brushless motor. Background technique [0002] The permanent magnet synchronous motor has the advantages of simple structure, reliable operation, small size, low loss and high efficiency, but it has the problem that the air gap magnetic field is difficult to adjust. When the motor is required to operate within a wide speed range, continuous direct-axis current must be applied to weaken the magnetic field, which not only reduces the efficiency of the system, but may also cause irreversible demagnetization of the permanent magnet. Contents of the invention [0003] In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide an axial magnetic field hybrid excitation brushless motor, which is a hybrid excitation motor with a simple and compact structure, convenient connection and...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02K16/02H02K1/27H02K1/12H02K1/18
CPCH02K16/02H02K1/2793H02K1/12H02K1/182H02K2201/12
Inventor 邓秋玲向全所龙夏杨国灵廖宇琦
Owner HUNAN INSTITUTE OF ENGINEERING