×

Device for suppressing higher harmonic current of power source

  • US 5,712,774 A
  • Filed: 02/18/1997
  • Issued: 01/27/1998
  • Est. Priority Date: 02/24/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A device for suppressing higher harmonic current of a power source, comprising:

  • switching means for causing a capacitor, included in a capacitor input type rectifying circuit for a commercial power source, to selectively charge or discharge;

    voltage detecting means for receiving and detecting a sinusoidal voltage out of the commercial power source and generating an output signal only when an absolute value of said received and detected sinusoidal voltage is lower than a predetermined voltage; and

    control means for turning on said switching means in response to receiving the output signal from said voltage detecting means to thereby cause the capacitor to release a charge only when the sinusoidal voltage is lower than the predetermined voltage.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×