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Electromagnetic contactor and a method of controlling the same

  • US 5,737,172 A
  • Filed: 07/14/1995
  • Issued: 04/07/1998
  • Est. Priority Date: 07/15/1994
  • Status: Expired due to Fees
First Claim
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1. An electromagnetic contactor, to which an input voltage is loaded and having a coil, comprising:

  • detector means for detecting a peak voltage value of said input voltage and for detecting an average value of said input voltage, wherein said input voltage is one of a full wave rectified alternating current and a DC voltage,switching means, responsive to an operating signal, for controlling operation of said electromagnetic contactor; and

    a controller for generating said operating signal and for stabilizing input power supplied to said coil at a constant level by controlling a pulse width of said operating signal based on said peak voltage value and said average value of said input voltage detected by said detector means.

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