A method for reducing torque fluctuation of 6-pole 9-slot synchronous motor

A torque fluctuation and synchronous motor technology, applied in the direction of electromechanical devices, electrical components, etc., can solve the problems of large back EMF harmonics of the motor, affecting the smooth operation of the motor, and large torque fluctuations of the motor

Active Publication Date: 2018-09-18
BEIJING AUTOMATION CONTROL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the 6-pole 9-slot motor is that the harmonics of the motor’s back EMF are large, which causes large torque fluctuations of the motor and affects the smoothness of the motor’s operation.

Method used

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  • A method for reducing torque fluctuation of 6-pole 9-slot synchronous motor
  • A method for reducing torque fluctuation of 6-pole 9-slot synchronous motor
  • A method for reducing torque fluctuation of 6-pole 9-slot synchronous motor

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Embodiment Construction

[0023] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0024] A method for reducing torque ripple of a 6-pole, 9-slot synchronous motor, comprising the steps of:

[0025] (1) Calculate the power P i ’, if the motor runs for a long time, then If the motor runs for a short time, the where P N is the rated power of the motor, and η' is the prefetching efficiency of the motor.

[0026] (2) Calculate the inner diameter of the armature B' δ is the prefetched air gap flux density, A' δ is the prefetch line load, α i The polar arc coefficient is calculated for prefetching, λ' is the prefetching aspect ratio, and the outer diameter of the armature is D 1 >D il .

[0027] (3) Calculate the armature core length L≈λ′D i1 .

[0028] (4) Select the groove type as trapezoidal fan-shaped groove, and take the shoulder width of the groove Bottom width where h x1 is the groove shoulder depth, h 01 is the ...

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Abstract

The invention belongs to a method for reducing torque fluctuation of a synchronous motor, and specifically relates to a method for reducing torque fluctuation of a six-pole nine-slot synchronous motor. The method comprises the following steps of calculating power; calculating armature inner diameter; calculating the length of an armature core; choosing a fan-shaped slot with a trapezoidal slot type; calculating the inner diameter of a rotor fastening ring; calculating the inner diameter of rotor magnetic steel; calculating the length from the lowest point to the highest point at the two ends of the tangent plane of the magnetic steel; and calculating the length of the rotor magnetic steel. The method has the advantages that the structures of the stator and the rotor of the six-pole nine-slot motor are designed to reduce the back-electromotive-force harmonic of the motor, so that the torque fluctuation of the motor is lowered.

Description

technical field [0001] The invention belongs to a method for reducing the torque fluctuation of a synchronous motor, in particular to a method for reducing the torque fluctuation of a 6-pole and 9-slot synchronous motor. Background technique [0002] The 6-pole 9-slot motor is a concentrated winding motor. Each coil of the concentrated winding motor is wound on one tooth, which shortens the circumference of the coil and the extension length of the winding end, reduces the amount of copper used and the copper loss, and thus improves Motor efficiency. [0003] The 6-pole 9-slot motor has fewer motor poles in the concentrated winding motor, which can reduce the frequency of the alternating magnetic field of the iron core and reduce iron loss, and is especially suitable for high-speed motors. In addition, the 6-pole 9-slot motor replaces a large number of small slots with a small number of large slots, so that the slot utilization rate is high and the slot full rate is improved...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H02K29/03
Inventor郝晓宇揭军黄建周晶晶李建军
OwnerBEIJING AUTOMATION CONTROL EQUIP INST