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Electric motor car controller

  • US 20050264255A1
  • Filed: 02/07/2005
  • Published: 12/01/2005
  • Est. Priority Date: 05/25/2004
  • Status: Active Grant
First Claim
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1. An electric motor car controller for smoothing DC power collected from an overhead wire via a filter reactor and a filter capacitor, converting the DC power into AC power with a power converter, driving a vehicle-driving AC motor, and calculating a voltage command to be applied to the power converter based on a d-axis current command value and a q-axis current command value commanded by a voltage coordinate converter, the electric motor car controller comprising:

  • a voltage detector for detecting a voltage across the filter capacitor;

    an energy amount calculator for calculating an amount of energy of the filter capacitor from the voltage detected by the voltage detector;

    a frequency band component detector for extracting a given frequency band component contained in the amount of energy;

    a frequency band component coefficient unit for multiplying the frequency band component by a given coefficient and outputting a q-axis current command correcting value; and

    a q-axis current command correcting value adder for correcting the q-axis current command value by adding the q-axis current command correcting value to the q-axis current command value.

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