The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 2021
Filed:
May. 24, 2018
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Abstract
Pulsating current (ripple) is generated in a zero-phase current to increase a loss. A motor control system includes an inverter which drives a motor which includes windings separately wound around each phase and an inverter control unit which generates an output voltage pulse corresponding to each phase to control the inverter on the basis of a torque command value and a rotor position of the motor. The inverter control unit divides the output voltage pulse of at least one phase of the output voltage pulses into several pulses during one period of the output voltage pulse such that a zero-phase voltage of only one of positive and negative polarities is output several times from the motor in the one pulse period.