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:
May. 10, 2022
Filed:
Aug. 26, 2020
Global Mixed-mode Technology Inc., Hsin-Chu, TW;
Chien-Lun Chu, Hsinchu County, TW;
Global Mixed-mode Technology Inc., Hsin-Chu, TW;
Abstract
A motor controller is configured to reduce the motor noise. The motor controller is used for driving a motor, where the motor has a motor coil and a rotor. The rotor is divided into four pole regions N, S, N, and Sto switch phases. The four pole regions have a manufacturing tolerance and the pole region Nhas a time interval T. The motor controller comprises a switch circuit, a control unit, a phase detecting unit, and a current detecting unit. The switch circuit is configured to supply a driving current to the motor coil. Based on the manufacturing tolerance and the time interval T, the time point to detect the driving current is set to be a proportional time PT before the phase switching, where PT/Tis greater than the manufacturing tolerance.