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Permanent magnet synchronous motor diode follow current residual magnetism elimination device and use method

A permanent magnet synchronous motor, diode technology, applied in the direction of motor control, starting devices, electrical components, etc., can solve the problems of difficult to know the elimination of residual magnetism, slow residual magnetization elimination speed, etc., to shorten the time to eliminate residual magnetism , low cost and easy installation

Active Publication Date: 2019-11-22
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

[0004] The invention provides a permanent magnet synchronous motor diode freewheeling elimination residual magnetization device and its use method to solve the problems in the prior art that the permanent magnet synchronous motor residual magnetization elimination speed is slow and it is difficult to know the elimination of residual magnetism

Method used

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  • Permanent magnet synchronous motor diode follow current residual magnetism elimination device and use method

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0025] Such as figure 1 As shown, the present invention provides a device for permanent magnet synchronous motor diode freewheeling to eliminate residual magnetism, wherein the drive module includes: DC power supply VDC, capacitor C1, MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS tube Q5, MOS tube Q6, diode VD4; the energy storage unit includes: capacitor ...

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Abstract

The invention discloses a permanent magnet synchronous motor diode follow current residual magnetism elimination device which comprises a driving module and a three-phase stator winding of a permanentmagnet synchronous motor, wherein the driving module is connected with the three-phase stator winding and used for starting and keeping the permanent magnet synchronous motor to normally run; the device is characterized by further comprising a demagnetization module and a control module used for forming a control signal; the demagnetization module is connected with the control module and the driving module, and based on the control signal generated by the control module, the demagnetization module eliminates residual magnetism in the three-phase stator winding through the driving module. According to the invention, the demagnetization module demagnetizes the residual magnetism in the permanent magnet synchronous motor based on the control signal of the control module, so that the influence of the residual magnetism on the shutdown and restart of the permanent magnet synchronous motor is avoided.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor diode freewheeling device for eliminating residual magnetism and a use method thereof. Background technique [0002] The permanent magnet synchronous motor has the advantages of simple structure, small size, light weight, low loss, high efficiency, high power factor, etc. It is mainly used for the update of high-performance servo drive systems and DC motors that require fast response, wide speed range, and accurate positioning. Replacement motor. [0003] When the permanent magnet synchronous motor starts with load, if there is still residual magnetism in the motor windings in the previous shutdown, it will affect the starting and speed tracking of the permanent magnet synchronous motor. The existing practice is to stop the permanent magnet synchronous motor and wait for a period of time to naturally eliminate the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/20H02P29/024
CPCH02P6/20H02P29/024
Inventor 李可礼李垣江张懿魏海峰刘维亭李震张明明
Owner JIANGSU UNIV OF SCI & TECH
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