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AC ripple meter

  • US 5,119,073 A
  • Filed: 09/05/1990
  • Issued: 06/02/1992
  • Est. Priority Date: 09/05/1990
  • Status: Expired due to Fees
First Claim
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1. A monitor for measuring an ac ripple component of an output voltage of a bridge rectifier as a percentage of the output voltage, the monitor comprising, in combination:

  • first rectifier means for converting the ripple component into a first dc voltage equal to a magnitude of the ac ripple appearing at an output of the bridge rectifier;

    second rectifier means for converting the ac component and a dc component of the bridge rectifier output voltage into a second dc voltage equal to a magnitude of the rectifier output;

    ratio determining means connected to receive the first and second dc voltages and for providing an output alarm indication when a ratio of the first dc voltage to the second dc voltage exceeds a selected threshold magnitude; and

    display means for displaying the alarm indication.

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