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Parallel-magnetic-circuit hybrid-excitation permanent magnet motor

A hybrid excitation, permanent magnet motor technology, applied in the direction of magnetic circuit static parts, magnetic circuit rotating parts, synchronous motors with static armatures and rotating magnets, etc., can solve the problems of complex motor structure and reduced motor efficiency. , to achieve the effect of high material utilization, simple structure and high efficiency

Inactive Publication Date: 2013-04-17
南京维特力源自动化控制有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some hybrid excitation permanent magnet motors have an additional air gap in addition to the working main air gap, which reduces the efficiency of the motor, and the motor structure becomes complicated

Method used

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0027] Examples.

[0028] by figure 1 , 2 It can be seen that the parallel magnetic circuit hybrid excitation permanent magnet motor of the present invention includes a casing 1 in which a stator core 2 is arranged. The stator core 2 has slots 9 in the circumferential direction, and the stator windings 3 are arranged in the slots 9. The casing 1 and the stator core 2 are fixed. A rotating shaft 6 is arranged in the casing 1, and the rotating shaft 6 is connected to the casing 1 through a bearing 5. A rotor core 7 is arranged on the rotating shaft 6, and a permanent magnet 4 and a rotor field winding 8 are arranged on the rotor core 7. The permanent magnet 4, the rotor core 7 and the rotor field winding 8 can rotate together with the rotating shaft 6 in the stator core 2.

[0029] The working principle of the present invention is: taking a generator as...

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Abstract

The invention relates to a parallel-magnetic-circuit hybrid-excitation permanent magnet motor, which comprises a case. A stator consisting of a stator core and a stator winding, and a rotor consisting of a permanent magnet, a rotating shaft, a rotor core and an excitation winding are installed in the case. The stator winding is distributed in a slot which is circumferentially arranged in the stator core. The permanent magnet and the excitation winding are arranged on the rotor core. Magnetomotive forces established by the permanent magnet and the excitation winding are connected in parallel in the form of magnetic circuits. By adjusting the current of the excitation winding, the air-gap magnetic field of a ferromagnetic pole can be conveniently adjusted to realize the adjustment of the air-gap magnetic field of the motor. Since a permanent magnet magnetomotive force and an electrically excited magnetic magnetomotive force are connected in parallel in the form of magnetic circuits, the needed exciting current is smaller and the efficiency of the permanent magnet motor is kept to be high; since magnetic fluxes produced by two kinds of excitation magnetomotive forces flow through the same motor iron core, the material utilization rate is high and the power density of the permanent magnet motor is kept to be high; and the structure of the parallel-magnetic-circuit hybrid-excitation permanent magnet motor is similar to the structure of a common permanent magnet synchronous motor, an axial magnetic circuit and an additional air gap do not exist and the motor has the advantage of simple structure.

Description

Technical field [0001] The invention belongs to the field of motors, and relates to a permanent magnet motor. Background technique [0002] Permanent magnet motors have many advantages such as high efficiency, high power density, simple structure and reliable operation. Therefore, permanent magnet motors are widely used in industrial, civil, military and aerospace fields, such as drive motors for electric vehicles, air-conditioning compressors, wind generators, mobile power supplies, and generators in aerospace vehicles. [0003] However, for permanent magnet motors, the air gap magnetic field is determined by the performance of the permanent magnet, making it difficult to adjust the air gap magnetic field of the permanent magnet motor. When a permanent magnet motor is used as a generator, its terminal voltage will change with changes in factors such as load size, load nature or prime mover speed, which affects the quality of the output voltage of the permanent magnet generator; w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/12H02K1/17H02K1/27H02K21/04
Inventor 夏永洪黄劭刚陈瑛张景明
Owner 南京维特力源自动化控制有限公司
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