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Switching device of permanent magnet synchronous motor windings

A permanent magnet synchronous motor, winding switching technology, applied in the direction of electronic commutation motor control, electrical components, control systems, etc., can solve the problems of limited inverter and power supply voltage capacity, high back EMF

Inactive Publication Date: 2015-11-11
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of limited inverter and power supply voltage capacity by changing the equivalent series turns of the winding through the series-parallel switching of the DC side of the permanent magnet motor control system without increasing the capacity of the inverter. So as to solve the problem of high counter electromotive force when the permanent magnet motor runs at high speed, and improve the speed regulation range of the system

Method used

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  • Switching device of permanent magnet synchronous motor windings
  • Switching device of permanent magnet synchronous motor windings
  • Switching device of permanent magnet synchronous motor windings

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Embodiment Construction

[0063] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the protection scope of the present invention.

[0064] A permanent magnet synchronous motor winding switching device, see figure 1 , including n main circuit units, n sets of windings and 4n-4 switches, where n≥2.

[0065] Let i = 1, 2, 3, . . . n.

[0066] The i-th main circuit unit includes the 1i-th insulated gate bipolar transistor V 1i , 2i IGBT V 2i , 3i IGBT V 3i , 4i IGBT V 4i , 5i insulated gate bipolar transistor V 5i and the 6i IGBT V 6i .

[0067] The i-th set of windings consists of w...

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Abstract

The invention provides a switching device of permanent magnet synchronous motor windings. The switching device has n sets of windings corresponding to n main loop units; and with the joint effort of (4n-4) switches, switching of series connection and parallel connection of the n sets of windings is realized. The switching device has the following characteristics: the cost of the switching system is lowered and reliability of the switching system is improved; the motor operation efficiency is improved, the speed regulation range of the motor is expanded, and the demand of the main loop capacity is reduced; the selection principle of the switching rotation speed is provided; and a switching strategy for reducing the transient impulse current during the switching process is also brought forward.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors and their control. Background technique [0002] Permanent magnet synchronous motors have many significant advantages such as simple structure, no brushes and slip rings, no electric excitation system, high operational reliability, high power density, and flexible shapes and sizes of motors. In line with the economic development needs of energy saving and emission reduction, it can not only partially replace the traditional electric excitation motor, but also achieve high efficiency that is difficult for electric excitation motors to achieve. Therefore, permanent magnet synchronous motors have been widely used in variable speed drive systems with high requirements such as electric vehicles. As far as the current development level is concerned, compared with the induction motor, the permanent magnet motor is difficult to adjust the excitation of the permanent magnet, and the speed ...

Claims

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Application Information

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IPC IPC(8): H02P6/00
Inventor 黄嵩廖勇刘刃徐庆
Owner CHONGQING UNIV
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