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:
Jun. 26, 2018
Filed:
Oct. 25, 2016
Applicant:
Microchip Technology Incorporated, Chandler, AZ (US);
Inventors:
Assignee:
Microchip Technology Inc., Chandler, AZ (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 21/00 (2016.01); H02P 21/14 (2016.01);
U.S. Cl.
CPC ...
H02P 21/141 (2013.01); H02P 21/0089 (2013.01);
Abstract
A closed loop flux weakening method and apparatus are provided. The closed loop flux weakening apparatus may include a difference circuit that obtains a difference between a q-axis reference voltage and a q-axis voltage, a controller that converts the difference between the q-axis reference voltage and the q-axis voltage into a d-axis current of a stator of the motor, and a summation circuit that obtains a d-axis reference current by adding the d-axis current of the stator of the motor and a feed forward d-axis current of the stator of the motor.