Fault detection system for inverter

Fault detection system for inverter

  • CN 1,747,305 A
  • Filed: 04/04/2005
  • Published: 03/15/2006
  • Est. Priority Date: 09/10/2004
  • Status: Active Application
First Claim
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1. the failure detector of a converter is characterized in that, comprising:

  • The busbar voltage monitor unit that the busbar voltage of three-phase PWM converter is monitored;

    Output voltage monitor unit with the output voltage after each phase output voltage addition of three-phase PWM converter, the filter output addition through having the low-pass characteristic that cut-off frequency is lower than the PWM carrier frequency simultaneously;

    And fault verification unit, when the output voltage values of described output voltage monitor unit output was not the approximation of described busbar voltage monitoring unit monitors and 3/2 times of corresponding magnitude of voltage busbar voltage, described fault verification unit just judged that described three-phase PWM converter is a fault.

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