Patent ID: 6864646
Filing Date: 2005-03-08
Classification: H02P

Abstract:
1. A multiple inverter system for a vehicle comprising: an energy source; a capacitor coupled in parallel to said energy source; a first inverter coupled to said energy source and adapted to drive a first motor, a first controller having an output coupled to said first inverter for providing a first pulse width modulated signal thereto that is modulated in relation to a first clock signal; a second inverter coupled to said energy source and adapted to drive a second motor, and a second controller having an input for receiving a synchronization signal, and an output coupled to said second inverter for providing a second pulse width modulated signal thereto that is modulated in relation to a second clock signal, wherein said second controller uses said synchronization signal to generate said second clock signal having a predetermined relationship with respect to said first clock signal; wherein said first and second clock signals are synchronized with respect to each other; and wherein said first pulse width modulated signal is leading edge modulated with respect to said first clock signal and said second pulse width modulated signal is lagging edge modulated with respect to said second clock signal.