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. 17, 2023
Filed:
Nov. 09, 2020
Global Mixed-mode Technology Inc., Hsin-Chu, TW;
Chia-Tai Yang, Hsinchu County, TW;
Global Mixed-mode Technology Inc., Hsin-Chu, TW;
Abstract
A motor controller comprises a switch circuit, a driving circuit, a pulse width modulation circuit, and a Hall sensor. The switch circuit is coupled to a three-phase motor for driving the three-phase motor. The driving circuit generates a plurality of control signals to control the switch circuit. The pulse width modulation circuit generates a pulse width modulation signal to the driving circuit. The pulse width modulation signal has a duty cycle. The Hall sensor is coupled to the pulse width modulation circuit for generating a Hall signal. When the duty cycle is less than an alignment duty cycle, the motor controller generates an alignment waveform based on the initial value of the Hall signal. The alignment waveform may be a part of an M-shaped waveform.