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. 20, 2024
Filed:
Jul. 22, 2020
Ningbo Institute of Technology, Beihang University, Ningbo, CN;
Beihang University, Beijing, CN;
Ningbo Institute of Technology, Beihang University, Ningbo, CN;
Beihang University, Beijing, CN;
Abstract
A sensorless commutation error compensation system for a brushless motor, comprises: a brushless motor () and a commutation logic module circuit (). The commutation logic module circuit () is connected to three virtual Hall signal output ends of the brushless motor (), and used for receiving three virtual Hall signals output by the brushless motor (), obtaining three error compensation angle signals on the basis of the three virtual Hall signals, respectively superimposing the three error compensation angle signals and the three virtual Hall signals to form superposition results, and controlling the brushless motor () to adjust commutation timing on the basis of the superposition results, so as to achieve commutation error compensation. The system controls commutation errors on the basis of currents and counter-electromotive forces of three phases, instead of controlling the commutation errors on the basis of the current and the counter-electromotive force of one of the three phases, so that a torque ripple of a brushless direct-current motor can be reduced and a working efficiency of the motor can be improved.