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:
Feb. 27, 2018
Filed:
Nov. 02, 2016
Denso Corporation, Kariya, Aichi-pref., JP;
Koji Irie, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A control apparatus operates an inverter by overmodulation pulse width modulation control or rectangular wave control to control an output torque of a motor to a command torque. When a first condition is not met, the inverter is operated by the overmodulation pulse width modulation control. The first condition is that an amplitude parameter increases and reaches a determination value. The amplitude parameter is an amplitude of an output voltage vector of the inverter or a modulation factor of the output voltage of the inverter. When the first condition and a second condition are met, operation of the inverter is switched from operation by the overmodulation pulse width modulation control to operation by the rectangular wave control. The second condition is that a change amount in a negative d-axis direction of a current vector of current flowing to the motor after the first condition is met reaches a predetermined amount.