Permanent magnet synchronous motor rotor structure with segmented and staggered magnetic poles
A permanent magnet synchronous, rotor structure technology, applied in the magnetic circuit shape/style/structure, electric components, magnetic circuit rotating parts, etc., can solve the problems of complex rotor structure and weakening the cogging torque of permanent magnet synchronous motor.
Inactive Publication Date: 2021-02-12
SHAANXI AVIATION ELECTRICAL
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Problems solved by technology
[0003] In order to solve the problems existing in the prior art, the present invention proposes a permanent magnet synchronous motor rotor structure with segmented and dislocated magnetic poles. Aiming at the common problem of complicating the rotor structure in the existing means of eliminating or weakening torque fluctuations, from the magnetic poles The shape and installation method are convenient to design, the purpose is to effectively weaken the cogging torque of the permanent magnet synchronous motor, reduce the harmonic loss and rotor eddy current loss
Method used
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Embodiment Construction
[0031] Embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:
[0032] The rotor structure of the segmented and dislocated aviation permanent magnet synchronous motor in this embodiment includes a hollow shaft 1 , a front plate 2 , a tightening ring 3 , a rear plate 4 , a rotor assembly 5 and a key 6 . The rotor assembly 5 includes a magnetic pole 7 , a rotor yoke 8 and a bracket 9 .
[0033] The hollow shaft 1 is designed as a structure with a blind hole in the center, which is processed by structural steel or titanium alloy materials. The central blind hole can reduce the weight of the shaft; the hollow shaft 1 is designed with several axial holes on the outer surface The keyway, and the outer sides of the front and rear ends of the keyway are designed to be used to install the front plate 2 and the rear plate 4 journals.
[0034] The magnetic pole 7 adopts several Figure 5 The magnetic steel shown is combined; th...
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The invention provides a permanent magnet synchronous motor rotor structure with segmented and staggered magnetic poles. The rotor structure comprises a rotor shaft,rotor assemblies and a hooping ring. Through forward and reverse installation of the two rotor assemblies, the main magnetic poles are staggered by a certain angle in the circumferential direction, and the cogging torque can be effectively weakened; and the magnetic poles adopt a pentagon-like structure, two straight line edges on the inner side are attached to straight line edges of a rotor yoke, an included angle is an obtuse angle, the outer part is an arc, and the rotor yoke is circumferentially arranged to form a complete circle. The shape of the magnetic poles provides a magnetic field similar to sine, harmonic loss is reduced, and reliable transmission of electromagnetic torque is guaranteed through the structure. The eddy-current loss of the rotor is reduced by adopting methods of combining multiple sections of themagnetic poles, cutting a plurality of annular grooves in the circumferential direction of the hooping ring and the like. The processing technology is simple, the manufacturability and reliability ofthe motor are improved, and the harsh requirement of an airplane for the torque stability index is guaranteed.
Description
technical field [0001] The invention belongs to the technical field of aviation permanent magnet synchronous motors, and relates to a rotor structure of aviation permanent magnet synchronous motors with segmented and dislocated magnetic poles. Background technique [0002] The surface-mounted rotor of an aviation permanent magnet synchronous motor generally includes a shaft, a magnetic pole, a yoke, etc. The magnetic poles generally use radially magnetized tile-shaped poles, which are fixed on a cylindrical yoke to provide excitation for the motor stator assembly. Since the magnetic field provided to the air gap by the radially magnetized tile-shaped poles is a rectangular or trapezoidal magnetic field, it will cause torque fluctuations when the motor is running; and the interaction between the magnetic poles and the stator teeth and slots produces cogging torque superimposed on the On the electromagnetic torque, the torque ripple will be increased. In order to eliminate or...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02K1/27H02K1/30H02K1/24
CPCH02K1/2766H02K1/30H02K1/24H02K2213/03
Inventor 赵群弼段晓丽吴东华王璨范恺钱浩
Owner SHAANXI AVIATION ELECTRICAL