New type surface mounted permanent magnet synchronous motor with reduced cogging torque

A technology of permanent magnet synchronous motor and cogging torque, which is applied in the direction of magnetic circuits, electric components, electrical components, etc., can solve the problems of excessive no-load back EMF, partial saturation of the temperature field, and unsatisfactory improvement effects, etc., to achieve The effect of reducing dosage, increasing output power and reducing cogging torque

Active Publication Date: 2017-12-15
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the improvement effect is not very ideal, and it is easy to cause

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  • New type surface mounted permanent magnet synchronous motor with reduced cogging torque
  • New type surface mounted permanent magnet synchronous motor with reduced cogging torque
  • New type surface mounted permanent magnet synchronous motor with reduced cogging torque

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[0017] The present invention will be further explained below in conjunction with the drawings.

[0018] Such as figure 1 As shown, a new type of surface mount permanent magnet synchronous motor that reduces cogging torque includes a rotor 4 and a stator 5. The stator 5 has a stator slot 1, and the stator slot 1 has a rectangular armature winding 6 (armature winding 6 The use of rectangular windings can increase the slot full rate of the motor and is suitable for low-end industrial use); the structure of the rotor 4 is: the rotor shaft 7 is welded with four evenly distributed sector rotors 4 ( figure 2 ), the outer circumference of the sector rotor 4 is surface-mounted permanent magnets, and the permanent magnets are divided into three pieces. Both ends of the sector-shaped rotor 4 are surface-mounted on the outer circumference of the first permanent magnet 2 and the second permanent magnet 3 on the middle surface, and the second permanent magnet 3 is too large ; The rotor 4 adopt...

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Abstract

The present invention discloses a new type surface mounted permanent magnet synchronous motor with reduced cogging torque, which belongs to the technical field of electric motor manufacturing. The motor comprises a rotor and a stator. The stator is provided with a stator slot, and the stator slot is wound by rectangular armature windings. The structure of the rotor is that four evenly distributed fan-shaped rotors are welded on the rotor shaft, and the two end surfaces at the circumferences of the fan-shaped rotors are mounted with first permanent magnets in the same size, and the middle surfaces are mounted with second permanent magnets. There exist inclined angles among the second permanent magnets and the first permanent magnets. The thickness of the first permanent magnets gradually narrows from the middle to the two ends; and the thickness of the second permanent magnets gradually narrows from one end of the first permanent magnets to the other end. The invention is capable of weakening the cogging torque of permanent motors significantly; and at the same time, the use quantity of the silicon steel sheets of the rotation shaft makes the rotor lighter, which increases the output torque of the motor and improves the performance of the motor.

Description

technical field [0001] The invention belongs to the technical field of electric motor manufacturing, and in particular relates to a novel surface-mounted permanent magnet synchronous motor with reduced cogging torque. Background technique [0002] The cogging torque of the permanent magnet synchronous motor is an oscillating torque caused by the fluctuation of the interaction force between the permanent magnet and the stator cogging. Since the cogging torque will cause torque fluctuations, it may cause vibration and noise of the motor , when the motor is running at low speed and light load, it will affect the low-speed performance and high-precision positioning of the motor. It is very important to solve the cogging torque problem in the design of the motor, which can not only improve the starting performance of the motor but also improve the accuracy of the control system. [0003] The cogging torque cannot be completely eliminated by the existing technology, but its influe...

Claims

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Application Information

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IPC IPC(8): H02K1/16H02K1/27
CPCH02K1/165H02K1/278
Inventor 诸德宏李明达简耀
Owner JIANGSU UNIV
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