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Single-phase double-magnetic-circuit permanent magnet motor and driving method

A technology of permanent magnet motor and double magnetic circuit, which is applied in the direction of magnetic circuit rotating parts, motor generator/starter, magnetic circuit, etc., which can solve the problem that single-phase permanent magnet motor cannot start automatically, and achieve cost reduction and volume reduction , to avoid the effect of auxiliary structures

Active Publication Date: 2022-01-28
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problem that the single-phase permanent magnet motor cannot be self-started, the present invention provides a single-phase dual-magnetic circuit permanent magnet motor on the one hand, and on the other hand provides a method for driving the single-phase dual-magnetic circuit permanent magnet motor The driving method, its specific technical scheme is as follows

Method used

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  • Single-phase double-magnetic-circuit permanent magnet motor and driving method
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  • Single-phase double-magnetic-circuit permanent magnet motor and driving method

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Embodiment 1

[0035] refer to figure 1 As shown, in this embodiment, a single-phase double-magnetic circuit permanent magnet motor is disclosed. The single-phase double-magnetic circuit permanent magnet motor includes a stator assembly 2 , two rotor assemblies and a shaft assembly 4 .

[0036] refer to image 3 As shown, the stator assembly 2 includes a stator plate and an iron core 21 installed on the stator plate. A total of eight iron cores 21 are installed on the stator plate, and four iron cores 21 are respectively installed on each side of the stator plate. The stator plate The iron cores 21 on each side are respectively arranged around the axis of the stator disk, and the interval between adjacent iron cores 21 is 90°; windings 22 are respectively wound on each iron core 21, and each winding 22 is respectively connected in parallel with a single The phase AC power supply is connected, and the direction of the magnetic field generated when each winding 22 is fed with the current in t...

Embodiment 2

[0046] This embodiment provides a driving method for driving the permanent magnet motor in Embodiment 1. The method specifically includes applying a single-phase alternating current to the permanent magnet motor to drive the permanent magnet motor to start; when the permanent magnet motor starts smoothly, Each rotation of the rotor assembly by 90° corresponds to one current cycle, that is, the direction of the current is switched every time the rotor rotates by 45°.

[0047] Specifically, when the permanent magnet motor starts smoothly, refer to Figure 4 As shown, it is set that the winding 22 is passed through the negative current of the second half cycle at this time, and the iron core 21 generates a magnetic field from right to left at this time, forming a second close with the nearest first magnetic permeable component and the first permanent magnet 11 magnetic circuit 200, with Figure 4 Viewed from left to right, the rotor assembly produces a clockwise torque, and unde...

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Abstract

The invention relates to the field of new energy automobile motors, in particular to a single-phase double-magnetic-circuit permanent magnet motor and a driving method. The permanent magnet motor comprises a stator assembly, a rotor assembly and a rotating shaft assembly. The stator assembly comprises a stator disc, an iron core installed on the stator disc and a winding wound around the iron core, and the winding is connected with a single-phase alternating current power supply. The rotor assembly comprises a rotor disc and a first permanent magnet; the first permanent magnet is mounted on the rotor disc; the rotating shaft assembly comprises a rotating shaft and a second permanent magnet; the rotating shaft penetrates through the axes of the rotor disc and the stator disc, is fixedly connected with the rotor disc and is rotationally connected with the stator disc; the second permanent magnet is mounted in the rotating shaft; and the first permanent magnet and the second permanent magnet are opposite in polarity direction and different in magnetic field intensity. According to the invention, self-starting of the permanent magnet motor can be realized, and arrangement of a complex starting circuit and auxiliary equipment is avoided.

Description

technical field [0001] The invention relates to the field of new energy vehicle motors, in particular to a single-phase dual-magnetic circuit permanent magnet motor and a driving method. Background technique [0002] With the widespread popularization of new energy vehicles, the performance requirements for new energy vehicles are getting higher and higher. Permanent magnet motors are widely used in new energy vehicles due to their high efficiency and high power factor. In the general permanent magnet motor structure, the electromagnetic torque of the permanent magnet motor is generated by the interaction between the rotating magnetic field generated by the stator current and the magnetic field of the permanent magnet rotor. When a single-phase alternating current is applied to the permanent magnet motor, its torque The average value of is zero, and the permanent magnet motor cannot be self-started. In the prior art, in order to realize the starting of the permanent magnet...

Claims

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Application Information

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IPC IPC(8): H02K16/02H02K1/16H02K1/2798H02K1/30H02P1/16
CPCH02K16/02H02K1/165H02K1/2793H02K1/30H02P1/16
Inventor 刘志强李圳
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY