Patent ID: 7138773

Claim:
A non-highway vehicle comprising: an engine; a DC power source driven by the engine and providing DC power via a DC bus; a traction motor; a circuit for connection to the DC bus for providing power to the traction motor, said circuit comprising: a first inverter for connection between the DC bus and the traction motor; and a second inverter for connection between the DC bus and the traction motor whereby the second inverter is in parallel connection with the first inverter; a controller for coordinating operation of the first and second inverters, wherein each of the first and second inverters includes switching components and wherein the controller operates the switching components of each of the inverters in a timing pattern that takes into account the turn on delay and/or turn off delay of each switching component; a plurality of current sensors, each for sensing a current of one of the switching components, a plurality of additional sensors, each for sensing a voltages and/or a temperature of one of the components; a delay generator responsive to the current sensors and/or the additional sensors for generating a first delay signal; a regulator responsive to the current sensors for generating a second delay signal; and a combiner for combining the first delay signal and the second delay signal into a delay compensation signal indicating a delay for switching component.