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:
Oct. 22, 2019
Filed:
Apr. 12, 2018
Yoji Mori, Aichi, JP;
Taku Ogasawara, Aichi, JP;
Satoshi Doba, Aichi, JP;
OMRON AUTOMOTIVE ELECTRONICS CO., LTD., Aichi, JP;
Abstract
A polyphase electric motor control device stores a first threshold as a duty cycle at which noise caused by a high potential-side switching element starts to overlap a first measurement period, and a second threshold as a duty cycle at which time when a low potential-side switching element is switched from on to off is after an end of a second measurement period, makes a first judgment for comparing a maximum target duty cycle with the first threshold, and a second judgment for comparing a second greatest target duty cycle with the second threshold, measures a current in the first measurement period when the maximum target duty cycle is smaller than the first threshold, and measures a current in the second measurement period when the maximum target duty cycle is greater than the first threshold and the second greatest target duty cycle is smaller than the second threshold.