Patent ID: 8278867
Filing Date: 2012-10-02
Classification: H02M

Abstract:
1. A method of applying a three phase power source to a three phase load comprising the steps of: A. receiving a first sense signal corresponding to a first phase of the power source, a second sense signal corresponding to a second phase of the power source, and a third sense signal corresponding to a third phase of the power source; B. detecting a mutual crossing of the first and second sense signals and determining if a command signal is activated and if the mutual crossing is detected and the command signal is activated then activating a first synchronization signal corresponding to the first phase of the power source and activating a second synchronization signal corresponding to the second phase of the power source; C. determining if the first and second synchronization signals are activated and if the first and second synchronization signals are activated, then applying the first and the second phases of the power source to the first and second phases of the load, respectively; D. detecting a zero crossing of the third sense signal and if the zero crossing is detected and if the first and second synchronization signals are activated, then activating a third synchronization signal corresponding to the third phase of the power source; E. determining if the third synchronization signal is activated and if the third synchronization signal is activated, then applying the third phase of the power source to the third phase of the load; and F. returning to step A if the first, second, and third synchronization signals are not activated.