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Control power supply device for inverter

  • US 9,876,441 B2
  • Filed: 05/31/2016
  • Issued: 01/23/2018
  • Est. Priority Date: 06/02/2015
  • Status: Active Grant
First Claim
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1. A control power supply device for an inverter, which supplies stable power to the inverter, the control power supply device comprising:

  • a main switched-mode power supply (SMPS) configured to supply rated voltages to a controller and an auxiliary circuit of the inverter;

    an auxiliary SMPS configured to be operated when the main SMPS is interrupted to supply the rated voltages to the controller and the auxiliary circuit of the inverter ; and

    an SMPS controller configured to sense an output voltage from the main SMPS, determine whether the sensed voltage is within a normal range and interrupt the main SMPS and operate the auxiliary SMPS if not, and transmit trip information to the controller,wherein the SMPS controller senses an output voltage from the main SMPS when a DC-link voltage of the inverter is greater than a set voltage at the time of turning on or off the inverter, and determines whether the sensed voltage is in the normal range.

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