Power conversion system

  • US 11,063,512 B1
  • Filed: 05/05/2020
  • Issued: 07/13/2021
  • Est. Priority Date: 01/14/2020
  • Status: Active Grant
First Claim
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1. A power conversion system, comprising:

  • a first energy storage element having a first voltage level;

    a second energy storage element having a second voltage level;

    a first boost circuit electrically coupled between the first energy storage element and the second energy storage element;

    a switching element electrically coupled in parallel to the first boost circuit;

    a control circuit electrically coupled to the first boost circuit and the switching element;

    a detection circuit electrically coupled to the first energy storage element and the control circuit, and configured to detect the first voltage level, wherein when the first voltage level is less than a first preset level, the control circuit turns off the switching element, and drives the first boost circuit to maintain the second voltage level according to the first voltage level, and the power conversion system operates in a first state; and

    when the first voltage level is greater than or equal to the first preset level, the control circuit turns on the switching element, and turns off the first boost circuit, and the power conversion system operates in a second state; and

    a voltage conversion circuit electrically coupled to the first boost circuit, and having an output side; and

    a third energy storage element electrically coupled in parallel to the output side, and having an output voltage level and an output current value, wherein the detection circuit is electrically coupled to the third energy storage element, the control circuit is electrically coupled to the voltage conversion circuit, the voltage conversion circuit operates in a third state, and when the output voltage level is less than a voltage threshold level, the control circuit stops the power conversion system.

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