Patent ID: 8704480
Filing Date: 2014-04-22
Classification: H02P

Abstract:
1. A method for operation of a synchronous machine including a three-phase polyphase controller, connected to a polyphase power supply system and including at least three semiconductor switching elements which are switched on at specific times, the method comprising: defining a sinusoidal fundamental at a frequency which corresponds to the desired rotation speed of the synchronous machine; defining of two further fundamentals at the same frequency, which are phase-shifted with respect to the first fundamental, wherein wherein the first and second options for the frequency occur individually or in a time sequence; and selecting and using trigger times for triggering, at which triggering at a same time for two of the phases would cause a current of the same polarity as the fundamental associated with the respective phase, wherein the trigger times occur at a specific trigger angle after the respective zero crossing of the power supply system voltage.