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Motor flux change method

A technology of changing magnetic flux and magnetic flux, applied in the field of changing the magnetic flux of permanent magnet synchronous motor, can solve the problems of limited adjustment range, reduced power density, reduced reluctance torque, etc., to achieve the effect of controllable change of magnetic flux

Active Publication Date: 2019-07-09
SUZHOU AMTF ROBOTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adjustment range is limited. In addition, this magnetic structure will inevitably lead to a decrease in the q-axis inductance Lq (the flux linkage on the motor rotor can be decomposed into two mutually perpendicular coordinates of the d-axis and q-axis), the reluctance torque decreases, and the power Density reduction

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Motor variable magnetic flux structure with variable iron core cross-sectional shape and size

[0026] Referring to the variable magnetic flux structure of the motor shown in Figures 1 and 3, there is a flux regulating block 3 that can be embedded in the groove 2 on the outer circumference of the iron core on the stator core 1 with a wire slot 11, and the two sides of the stator core Two conical adjusting sleeves 4 are respectively arranged at the ends, and the diameter of the conical surface 41 of the conical adjusting sleeve near the end of the iron core is smaller in the axial direction of the stator, and the diameter away from the end of the iron core is larger.

[0027] Both ends of the magnetic flux regulating block 3 have tapered surfaces 31 that are in sliding contact with the tapered surfaces 41 of the two tapered regulating sleeves.

[0028] In order to keep the tapered surfaces 31 at both ends of the magnetic flux adjustment block 3 in contact w...

Embodiment 2

[0032] Embodiment 2: Variable magnetic flux structure of motor with variable gap size

[0033] see Figure 5 , On the stator core 1 with wire slot 11, there is an inlay 6 embedded in the chute 5 on the periphery of the iron core and in contact with the bottom surface of the chute, and there is a gap between the two sides of the inlay and the two sides of the chute.

[0034] By moving the insert in the circumferential direction of the stator, by changing the size of the gap between the insert and the two sides of the slide groove, the reluctance of the stator core is changed, thereby changing the stator magnetic flux.

[0035] An insert adjustment ring 7 that rotates around the stator axis is arranged on the outer periphery of the stator core, and the outer periphery of the insert 6 is fixedly connected with the inner periphery of the insert adjustment ring 7 . The outer periphery of the insert adjustment ring 7 has two ring gears 9 meshed with the insert adjustment gear shaft...

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Abstract

The invention provides a motor flux change method. The magnetic conductivity of the stator is changed to change the effective flux of the motor and control the flux of the magnetic linkage of the motor, so as to meet the needs of the motor for low-speed high torque, high-speed high power and high efficiency. In the method, the flux of the stator is changed by changing the cross sections of one orseveral parts of the magnetic linkage of the stator, so that the flux of the motor is changed.

Description

technical field [0001] The invention relates to a method for changing the magnetic flux of a motor, especially a method for changing the magnetic flux of a permanent magnet synchronous motor. Background technique [0002] With the popularization and expansion of motor applications, the performance requirements of motors have also increased accordingly. Especially in the field of new energy transportation, motors are required to have high torque at low speeds and high power at high speeds. In addition, high efficiency is required in any case. However, it is often difficult for general motors to meet this requirement. Taking the permanent magnet synchronous motor as an example, if it has a large torque at low speed, the magnetic field strength of the rotor will be very high. However, when the high magnetic field strength is running at high speed, the self-inductance electromotive force will inhibit the increase of the motor speed, so that the motor cannot For high-speed opera...

Claims

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Application Information

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IPC IPC(8): H02K21/02
CPCH02K21/025
Inventor 林中尉门天珺
Owner SUZHOU AMTF ROBOTS CO LTD
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