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Electric-vehicle control apparatus

  • US 8,847,521 B2
  • Filed: 09/13/2012
  • Issued: 09/30/2014
  • Est. Priority Date: 03/31/2010
  • Status: Active Grant
First Claim
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1. An inverter unit that supplies alternating-current power for driving four motors, comprising:

  • four inverters each including a U-phase circuit, a V-phase circuit, and a W-phase circuit, each inverter for driving a corresponding one of the four motors, wherein each phase of each of the four inverters comprises a semiconductor device package including at least two semiconductor switching elements;

    a heat receiving plate having a surface to which the U-phase circuits, the V-phase circuits, and the W-phase circuits of the four inverters are attached; and

    a heat radiator that radiates heat from the heat receiving plate;

    wherein the U-phase circuits, the V-phase circuits, and the W-phase circuits of the four inverters are laid out in a matrix pattern on the heat receiving plate such that (1) the U-phase circuit, the V-phase circuit, and the W-phase circuit for each respective of the four inverters is laid out in a line on the heat receiving plate, and (2) the U-phase circuits of each of the four inverters are laid out in a line, (3) the V-phase circuits of each of the four inverters are laid out in a line, and (4) the W-phase circuits of each of the four inverters are laid out in a line.

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