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Safety circuit for permanent magnet synchronous generator actuated by weak field

A permanent magnet synchronous motor and circuit technology, which is applied in the direction of emergency protection circuit devices, electrical components, etc., and can solve problems such as potential safety hazards and damage to the main body

Inactive Publication Date: 2007-07-25
INTERNATIONAL RECTIFIER COEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation creates a security risk and can lead to damage to the subject
The second scenario is when the controller is de-energized from the PMSM due to a controller failure, the PMSM can generate overvoltage on the DC bus
[0010] Therefore, at the gate driver IC level, the cause of this lack of control is worth managing and preventing in field weakening operation resulting in high back EMF at high speed operation

Method used

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  • Safety circuit for permanent magnet synchronous generator actuated by weak field
  • Safety circuit for permanent magnet synchronous generator actuated by weak field
  • Safety circuit for permanent magnet synchronous generator actuated by weak field

Examples

Experimental program
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Embodiment Construction

[0017] Accompanying drawing 1 shows the structural diagram of a PMSM controller. The mains alternating current (AC) enters a rectification stage R, which may include, for example, a boost converter stage. The output of rectifier R is the DC bus voltage. The DC bus voltage is smoothed by bulk capacitor C. The DC bus voltage is supplied to an inverter stage (IN), which converts the DC voltage to AC voltage to drive the motor in M ​​phases, in this case, U, V, W. For the three-phase motor shown, the inverter consists of a series connection of semiconductor switches Q 1 , Q 2 ;Q 3 , Q 4 ; and Q 5 , Q 6 ; composed of three half bridges across the DC bus; the gates HO1, LO1, HO2, LO2 and HO3, LO3 of the high-side and low-side switches are controlled by the gate driver IC, which provides the gate signal to the switch To properly drive the motor at the desired speed, for example by pulse width modulation (PWM). The gate driver IC includes a control circuit CONTROL 20 that dri...

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PUM

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Abstract

A safety circuit for providing protection against failures that impact safety of an inverter circuit driving a Permanent Magnet Synchronous Motor (PMSM) including high and low side switches connected in a bridge and driven by a gate driver circuit during operation of the PMSM in a field weakening mode, the gate driver circuit including stages for driving the high and low side switches, the safety circuit comprising a main power supply and a back-up power supply for supplying voltage to the gate driver circuit driving the switches of the bridge of the inverter circuit, wherein if the main power supply fails to deliver adequate power to the gate driver circuit, the back-up power supply provides power to the gate driver circuit to allow the gate driver circuit to turn ON the low side switches and turn OFF the high side switches.

Description

[0001] References to related applications [0002] The application is based on and requires the application number submitted on September 21st, 2005 to be: No.60 / 719,241, the U.S. Provisional Protection Circuit entitled "Full Protection Circuit for Permanent Magnet Synchronous Motor Weak Field (field weakening) operation" Benefit of this application, the present application claims priority from the above application and the disclosure of which is hereby incorporated by reference. Background technique [0003] [002] The present application relates to a safety interlock and protection circuit of a DC-AC inverter motor controller for driving a permanent magnet synchronous motor (PMSM), in particular to a gate driver designed to drive a PMSM integrated A safety circuit implemented in an electrical circuit (IC). [0004] [003] PMSMs have become important power sources for energy-efficient appliances including air conditioners, refrigerators, washing machines, and the like. PMSMs ...

Claims

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Application Information

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IPC IPC(8): H02H7/122H02H7/08
Inventor G·加利M·格拉索C·博基奥拉
Owner INTERNATIONAL RECTIFIER COEP
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