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Slot matching and winding type selection method suitable for five-phase asynchronous motor

A motor and slot matching technology, applied in the field of motors, can solve problems such as the number of stator and rotor slots is not uniform, synchronous additional torque vibration, noise, motor influence, etc., achieve low air gap flux density harmonic distortion, reduce torque Pulsation, guaranteed sine effect

Active Publication Date: 2021-08-31
CHANGZHOU INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]In the literature on five-phase asynchronous motors at home and abroad, there is no unified strategy for the selection of the number of stator and rotor slots. Improper coordination of the number of stator and rotor slots may lead to asynchronous additional Torque, synchronous additional torque, vibration, noise, etc., and these mainly affect the motor through the air gap magnetic field

Method used

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  • Slot matching and winding type selection method suitable for five-phase asynchronous motor
  • Slot matching and winding type selection method suitable for five-phase asynchronous motor
  • Slot matching and winding type selection method suitable for five-phase asynchronous motor

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Embodiment 1

[0035] The first step: choose the appropriate number of pole pairs; according to the speed requirements of different working conditions and load characteristics, the number of pole pairs is determined by the frequency and speed. When the frequency is fixed at 50Hz, the speed is selected as 3000r / min, 1500r / min, 1000r / min, ..., the corresponding pole pairs are 1 pair of poles, 2 pairs of poles, 3 pairs of poles, ..., other frequencies are determined by the synchronous speed formula. This example is implemented by taking 2 pairs of poles at 50Hz as an example.

[0036] Step 2: Limit the range of the number of stator slots of the five-phase motor; after determining the required 2 pairs of poles, select the number of stator slots Z 1 , limiting the range of the number of stator slots for a five-phase motor: Z 1 =10k, and 60>Z 1 >20, k is a positive integer. In order to ensure symmetry, the number of stator slots selected is 10k; for the convenience of offline stator slots, the...

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Abstract

The invention discloses a slot matching and winding type selection method suitable for a five-phase asynchronous motor. The method is mainly characterized in that firstly, the number of pole pairs is determined according to the rotating speed needed by the working condition, then the selection range of the number of stator grooves and the number of rotor grooves is limited, then any rotor groove shared by different stator grooves serves as an invariant, the number of the stator grooves serves as a variable, the number of the stator grooves with the lowest air gap flux density harmonic distortion rate serves as the optimal number of the stator grooves, the determined number of pole pairs and the determined number of stator grooves serves as invariants, the number of rotor grooves serves as variables, the number of rotor grooves with the lowest air gap flux density harmonic distortion rate serves as the optimal number of rotor slots, and finally, different winding types are combined with the determined grooves in a matched manner, and the winding type with the lowest harmonic distortion rate is selected so as to obtain an optimal slot matching and winding type combination scheme of the five-phase motor. According to the method, additional loss can be reduced, strong synchronous additional torque is prevented from being generated in the starting process, low air gap flux density harmonic distortion can be achieved, and sine performance of air gap flux density is guaranteed.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a slot matching and winding type selection method suitable for five-phase asynchronous motors. Background technique [0002] Five-phase asynchronous motors have attracted widespread attention due to their high power density, small torque ripple, and high reliability. In some occasions with low power and high fault-tolerant performance requirements, five-phase induction motors are also used to improve their reliability. [0003] In the literature on five-phase asynchronous motors at home and abroad, there is no unified strategy for the selection of the number of stator and rotor slots. Improper coordination of the number of stator and rotor slots may lead to asynchronous additional torque, synchronous additional torque, vibration, noise, etc., and these The most important thing is to affect the motor through the air gap magnetic field. Therefore, the stator-rotor slot fit is an im...

Claims

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Application Information

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IPC IPC(8): G06F30/20H02K1/16H02K1/26H02K3/12H02K3/28H02K17/12G06F119/10H02K29/03
CPCG06F30/20H02K1/165H02K1/265H02K3/12H02K3/28H02K17/12G06F2119/10H02K2213/03H02K29/03
Inventor 常存存徐永明曹恒佩庞松印
Owner CHANGZHOU INST OF TECH
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