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:
Nov. 17, 2020
Filed:
Jan. 22, 2019
Zhongshan Broad-ocean Motor Co., Ltd., Zhongshan, CN;
Jizhong Wang, Zhongshan, CN;
ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD., Zhongshan, CN;
Abstract
A method of starting a sensorless BLDC motor. The method includes: providing a stator flux rotating coordinate system including a ds-axis and a qs-axis, selecting a voltage Vds on the ds-axis, allowing a voltage Vqs on the qs-axis to be 0, and resetting a to-be-started motor to a preset position; providing a flux λ to the motor, allowing the current Iqs on the qs-axis to rise, maintaining the flux constant, calculating a real-time torque Taccording to the torque/current closed loop on the qs-axis, comparing a preset starting torque Twith the real-time torque Tperforming the torque/current closed-loop control until the real-time torque Treaches the preset starting torque Tand continuously raising the real-time torque according to the torque/current closed loop to operate a load, measuring a real-time rotation speed Vcomparing a preset starting rotation speed Vwith the measured real-time rotation speed V