Patent ID: 7221122
Filing Date: 2007-05-22
Classification: H02P

Abstract:
1. An inverter control device controlling an inverter by selecting a switching vector to be supplied to the inverter so that a detection current flowing in a coil winding of each phase of an electric motor follows a specified current value, the inverter control device comprising: means configured to determine the switching vector every a given timing in order to decrease the deviation between a current flow value detected in a coil winding of each phase and a given current value, to select the switching vector until the elapse of a keeping time that is given in advance from the determination time of the switching vector, and to selects a zero switching vector by which a voltage difference between the coil windings of each pair of the phases becomes zero until a determination time to determine the newly switching vector after the elapse of the keeping time, and to drive the inverter based on the selected switching vector.