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Power system and method for driving an electromotive traction system and auxiliary equipment through a common power bus

  • US 7,928,597 B2
  • Filed: 12/12/2008
  • Issued: 04/19/2011
  • Est. Priority Date: 12/12/2008
  • Status: Active Grant
First Claim
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1. A power system comprising:

  • a power source;

    a power bus coupled to receive electrical power from the power source;

    a traction system coupled to the power bus, wherein the traction system comprises at least one electromotive machine having a first type of stator winding configured to provide a level of protection relative to voltage spikes expected at the traction stator under a first voltage level appropriate for the traction system;

    inverter circuitry coupled to draw electrical power from the bus to drive auxiliary equipment comprising at least one electromotive machine having a second type of stator winding configured to provide a level of protection relative to voltage spikes expected at the auxiliary stator under a second voltage level, wherein the second voltage level is lower than the first voltage level; and

    signal-conditioning circuitry coupled to attenuate repetitive voltage spikes produced by the inverter circuitry, wherein the power bus is operated at the first voltage level, and further wherein the voltage spike attenuation is sufficient to protect the auxiliary stator notwithstanding of operation of the power bus at the first voltage level, wherein the signal-conditioning circuitry comprises a filter, wherein the filter comprises a resistor/inductor/capacitor-based filter arranged in a Y-circuit topology, wherein each branch of the Y-circuit comprises a respective resistor, inductor and capacitor connected in series circuit.

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