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Multi-switch power converter

  • US 9,935,549 B2
  • Filed: 07/08/2016
  • Issued: 04/03/2018
  • Est. Priority Date: 07/08/2016
  • Status: Active Grant
First Claim
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1. A power conversion system, comprising:

  • a 5-switch power conversion circuit comprising;

    a voltage supply;

    a first inductor coupled to a positive side of the voltage supply and a second inductor coupled to the negative side of the voltage supply;

    a DC bus comprising a first capacitor on a positive side of the DC bus and a second capacitor on a negative side of the DC bus;

    a first switch transistor, a second switch transistor, a third switch transistor, and a fourth switch transistor each coupled between the at least one inductor and the DC bus in a 3-level DC-DC boost circuit configuration;

    a fifth switch transistor disposed between the at least one inductor and the first, second, third, and fourth switch transistors, wherein the fifth switch transistor is coupled in parallel to the second and third switch transistors;

    a controller communicatively coupled to the first, second, third, fourth, and fifth switch transistors, wherein the controller is configured to output signals to the first, second, third, fourth, and fifth switch transistors to independently control the positions of the first, second, third, fourth, and fifth switches and wherein the controller is configured to output a signal to the fifth switch transistor to turn the fifth switch transistor to an ON-state when both the second and third switch transistors are in an ON-state such that current will flow through the inductors and the fifth switch transistor instead of through the inductors and the second and third switches so as to reduce conduction losses through the power conversion system due to the current flowing primarily through the fifth switch transistor instead of the second and third switch transistors.

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