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Main circuit structure for permanent magnet synchronous motor control system

A permanent magnet synchronous motor and control system technology, which is applied to emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. The effect of reliability

Inactive Publication Date: 2010-06-16
SHANGHAI DIANJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This part of the circuit is prone to short-circuit faults and has surge voltages. How to reduce short-circuit faults and limit the input surge voltage is a problem that the applicant of the present invention is committed to researching

Method used

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  • Main circuit structure for permanent magnet synchronous motor control system
  • Main circuit structure for permanent magnet synchronous motor control system

Examples

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Embodiment Construction

[0008] The present invention will be further described below in conjunction with accompanying drawing.

[0009] see figure 1 , the figure shows a main circuit structure for a permanent magnet synchronous motor control system of the present invention, including a power terminal block 1, a three-phase air switch QF1 connected to the power terminal block 1, and a three-phase air switch QF1 The connected rectifier circuit 2, the filter circuit C1 connected to the rectifier circuit 2, the contactor KM connected to the power terminal block 1 and the input end of the rectifier circuit 2, and three pressure-sensitive switches connected to the output end of the three-phase air switch QF1 in a delta connection Resistors RV1, RV2 and RV3, the three varistors RV1, RV2 and RV3 are located between the three-phase air switch QF1 and the contactor KM.

[0010] The above examples are only used to illustrate the present invention, but not to limit the protection scope of the present invention....

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PUM

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Abstract

The invention discloses a main circuit structure for a permanent magnet synchronous motor control system, which comprises a power connection base, a three-phase air switch, a rectifying circuit, a filter circuit, a contactor and three voltage dependent resistors, wherein, the three-phase air switch is connected with the power connection base; the rectifying circuit is connected with the three-phase air switch; the filter circuit is connected with the rectifying circuit; the contactor is connected with the power connection base and the input end of the rectifying circuit; and the three voltage dependent resistors are connected with the output end of the three-phase air switch in a delta connecting mode. In the invention, the three-phase air switch is used and can play a protective role on the short-circuit fault of the subsequent elements and circuits, and the three voltage dependent resistors can limit the input surge voltage to some extent. By adopting the technical scheme of the invention, the reliability of the whole permanent magnet synchronous motor control system can be improved.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor control system, in particular to a main circuit structure for the permanent magnet synchronous motor control system. technical background [0002] The permanent magnet synchronous motor control system includes the main circuit of the system, which is located at the input end and plays a vital role in the control of the entire system. This part of the circuit is prone to short-circuit faults and has surge voltages. How to reduce short-circuit faults and limit the input surge voltage is a problem that the applicant of the present invention is devoted to research. Contents of the invention [0003] The purpose of the present invention is to provide a main circuit structure for a permanent magnet synchronous motor control system, which can protect the circuit from short-circuit faults and has a certain limit on the input surge voltage. [0004] The technical solution for achieving the above p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/085H02H9/04H02H3/08
Inventor 刘军陶益民齐亮李劲汤雪华唐丽婵陈江洪王庆东王振滨
Owner SHANGHAI DIANJI UNIV
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