Asymmetric design structure for five pair poles of minimum unit of multi-unit permanent magnet motor

A permanent magnet motor, the technology of the smallest unit, applied in the direction of magnetic circuit shape/style/structure, synchronous motor with stationary armature and rotating magnet, shape/style/structure of winding conductor, etc., to achieve smooth operation and cogging The effect of low torque and torque ripple

Active Publication Date: 2019-05-03
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this also brings certain disadvantages, that is, each unit motor system has the same torque ripple when running together, and the same cogging torque when no-load

Method used

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  • Asymmetric design structure for five pair poles of minimum unit of multi-unit permanent magnet motor
  • Asymmetric design structure for five pair poles of minimum unit of multi-unit permanent magnet motor
  • Asymmetric design structure for five pair poles of minimum unit of multi-unit permanent magnet motor

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] The overall structure of the multi-unit motor is as follows: figure 1 As shown, the stator winding of the multi-unit permanent magnet motor of the present invention has N independent operating units, and each independent operating unit is a 3-phase symmetrical AC winding, and the phase number m of the multi-phase multi-unit permanent magnet synchronous motor is: m= 3×N, where N is an even number greater than 3.

[0015] The designed multi-unit permanent magnet motor has the same number of pole pairs for each unit motor rotor and the minimum number of unit pole pairs is four (the number of poles for each unit is 10k, k is a positive integer k=1,2,3...) , the stators of two adjacent units are asymmetrical, and the number of slots is unequal. The number of slots of unit i is 12k (i is an odd number), and the number of slots of unit j is 15k (j is an even number). ...

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Abstract

The invention provides an asymmetric design structure for five pair poles of a minimum unit of a multi-unit permanent magnet motor, which aims to reduce cogging torque and torque ripple and to make running characteristics of a motor more stable, and belongs to the technical field of motor design and manufacturing. The multi-unit permanent magnet motor employed in the structure includes a stator and a rotor, wherein a stator winding has N independent operating units, each of the independent operating units has 3 symmetrical alternating current windings, and the phase number m of a multi-phase multi-unit permanent magnet synchronous motor is: m=3*N, wherein N is an even number greater than 3, the rotor has a same number of pole pairs and the number of pole pairs of the minimum unit is five,the number of poles per unit is 10k, k is a positive integer, motor stators of two adjacent units are asymmetric, and the number of slots is not equal, wherein the number of slots of a No. i unit is 12k, i is an odd number, and the number of slots of a No. j unit is 15k, and j is an even number. The structure optimizes the cogging torque and torque ripple characteristics of the motor from a structure of a motor body, and can make the motor run smoothly under existing control strategies and drivers.

Description

technical field [0001] The invention relates to a multi-unit permanent magnet motor with an asymmetric unit motor structure, belonging to the technical field of motor design and manufacture. Background technique [0002] The permanent magnet synchronous motor is a synchronous motor that is excited by a permanent magnet to generate a synchronous rotating magnetic field. The permanent magnet acts as a rotor to generate a rotating magnetic field. The three-phase stator winding reacts through the armature under the action of the rotating magnetic field to induce a three-phase symmetrical current. At this time, the kinetic energy of the rotor is converted For electric energy, the permanent magnet synchronous motor is used as a generator; in addition, when the three-phase symmetrical current is passed into the stator side, since the three-phase stators have a difference of 120 in space, the three-phase stator current generates a rotating magnetic field in space, The rotor moves un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K1/16H02K3/12
Inventor 曾德鹏姚绪梁张强王景芳
Owner HARBIN ENG UNIV
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