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Motor stator, motor and bus

A technology for motor stators and buses, which is applied to synchronous motors with stationary armatures and rotating magnets, synchronous motors with rotating armatures and stationary magnets, electrical components, etc. It can improve the output torque, improve the utilization rate of permanent magnets, and reduce the magnetic flux leakage.

Pending Publication Date: 2019-01-01
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tooth tip magnetic flux leakage will cause negative effects such as low utilization rate of permanent magnets, premature saturation of motor tooth tops, and large torque ripple

Method used

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  • Motor stator, motor and bus
  • Motor stator, motor and bus
  • Motor stator, motor and bus

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] Definitions of some terms in this application:

[0046] Near-pole slot permanent magnet synchronous motor: a permanent magnet motor with a similar number of stator teeth and rotor poles (N S =2p±1;N S =2p±2, N S Indicates the number of teeth, p indicates the number of pole pairs), the width of the stator tooth top is similar to the width of the pole arc;

[0047] Flux leakage: refers to the magnetic field in the motor that does not pass through the closed main magnetic circuit, which cannot generate effective torque, and will also cause saturation of the part of the iron core that the flux leakage passes through;

[0048] Main magnetic circuit: The magnetic field emitted by the rotor permanent magnet passes through the air gap, stator teeth, stator yoke, stator teeth, air gap and then returns to the rotor to close. This magnetic field channel is called the main magnetic circuit, which is the closed magnetic field of the motor during normal operation path of;

[0049...

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PUM

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Abstract

The invention provides a motor stator, a motor and a bus. The motor stator comprises stator teeth (1). Each stator tooth (1) comprises a tooth root part (2) and a tooth top part (3). The tooth top part (3) is arranged on the tooth root part (2). The tooth top part (3) comprises a first tooth top unit (4) and a second tooth top unit (5). The first tooth top unit (4) and the second tooth top unit (5) are arranged on the two sides of the tooth root part (2) along the circumferential direction of the motor stator, and a tooth top air gap (6) is formed between the first tooth top unit (4) and the second tooth top unit (5). According to the motor stator, the magnetic flux leakage can be reduced, the utilization ratio of the permanent magnet can be improved and the output torque can be improved.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a motor stator, a motor and a bus. Background technique [0002] Low-speed high-torque motors are suitable for many occasions, such as electric vehicle drives, high-speed rail drives, elevators, mines, etc. Generally, the number of poles of low-speed and high-torque motors is large, and the number of stator slots is correspondingly multiplied, resulting in difficult processing and technical difficulties. Near-pole slot permanent magnet synchronous motors are very suitable for low-speed high-torque motors. The number of stator slots is similar to the number of rotor poles, which can solve the above problems. [0003] Such as figure 1 As shown, the top 1' of the stator tooth of the permanent magnet synchronous motor near poles is wider, which is similar to the length of the rotor pole arc, so that a considerable part of the flux linkage generated by the permanent magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/17H02K21/26
CPCH02K1/17H02K21/26H02K1/165H02K2201/03H02K2213/03H02K1/148Y02T10/64H02K3/487H02K21/22
Inventor 廖克亮童童卢素华陈彬
Owner GREE ELECTRIC APPLIANCES INC