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Method for protecting at least one consumer against overvoltage tages and device for carrying out the method

  • US 20040022002A1
  • Filed: 05/30/2003
  • Published: 02/05/2004
  • Est. Priority Date: 12/01/2000
  • Status: Active Grant
First Claim
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1. A method for protecting at least one consumer against overvoltages when working with a method for the non-contact transmission of electric power from one or more medium-frequency current sources, whose frequencies may have deviations around medium frequency fM, to the at least one moving consumer via one or more transmission lines and transformer heads, allocated to the consumers, having a downstream matching controller for adjusting the power received from the transmission line, a transmission line being supplied from a medium-frequency current source with a medium-frequency current that is constant in its effective value during the power transmission, the respective consumer being supplied with energy by at least one matching controller having at least one feed-in, one or more fed currents being rectified in each instance in a rectifier, smoothed in each instance by a link-circuit reactor, and brought together to form a link-circuit current, with the aid of a switch (S, V1), the link-circuit current, brought together in each instance, either being supplied to a link-circuit capacitor buffering output voltage U= of the matching controller, or being shunted upstream of the link-circuit capacitor, depending upon the power demand of the consumers, and the voltage U= at at least one link-circuit capacitor being compared to a fixed or predefinable value, and upon exceeding this value, an electronic power circuit-breaker (V4, Thy) being turned on for shunting the link-circuit current.

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