Patent ID: 7933132

Claim:
A power converter system comprising: a plurality of variable frequency power converters, each variable frequency power converter having a switching frequency; a plurality of synchronization circuits, each synchronization circuit associated with a respective one of the plurality of variable frequency power converters; and a control circuit coupled to and coordinating the plurality of synchronization circuits; wherein the plurality of synchronization circuits and the control circuit are operable to synchronize the switching frequencies of the variable frequency power converters to each other; wherein each synchronization circuit is operable to: receive a first input signal indicative of the beginning of a switching period for the associated variable frequency power converter; receive a second input signal indicative of the end of the switching period for the associated variable frequency power converter; generate a first output signal for directing a pulse width modulation of the associated variable frequency power converter; and generate a second output signal for coordinating a phase relationship with another variable frequency power converter in the system.