New-energy automobile inverter phase current over-current hardware protection system and method

New-energy automobile inverter phase current over-current hardware protection system and method

CN
  • CN 103,795,038 B
  • Filed: 01/27/2014
  • Issued: 08/16/2019
  • Est. Priority Date: 01/27/2014
  • Status: Active Grant
First Claim
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1. a kind of new-energy automobile inverter phase current over-current hardware protection system, comprising:

  • motor M, high voltage power battery HV,U/V/W three-phase current sensor, six road IGBT of inverter and the current foldback circuit being connect with motor M;

    It is characterized by;

    instituteStating six road IGBT of inverter includes three groups of connection units in parallel;

    IGBT1 and IGBT2, IGBT3 and IGBT4 and IGBT5 andIGBT6, wherein tri- tunnel IGBT1, IGBT3 and IGBT5 is connected to the positive terminal of high voltage power battery HV, IGBT2, IGBT4The negative pole end of high voltage power battery HV, the U and V and W of the U/V/W three-phase current sensor are connected to tri- tunnel IGBT6Mutually it is sequentially connected filter resistance, filter capacitor, voltage follower amplifier, resistor network, comparator one and comparator two, instituteIt states resistor network and comparator one and comparator two constitutes circuit;

    The connection type of the U/V/W three-phase circuit is identical.

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