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:
Dec. 16, 2025
Filed:
Mar. 05, 2024
Elite Semiconductor Microelectronics Technology Inc., Hsinchu, TW;
Ru-Chang Wu, Hsinchu, TW;
Elite Semiconductor Microelectronics Technology Inc., Hsinchu, TW;
Abstract
A method for enabling a permanent magnet synchronous motor (PMSM) to start in a reverse direction may include: estimating a load torque according to a torque and an actual rotational speed of the PMSM, to generate an estimated load torque; controlling the torque according to the estimated load torque to decelerate the PMSM, until the actual rotational speed of the PMSM is reduced to a predetermined target rotational speed; in response to the actual rotational speed of the PMSM being reduced to the predetermined target rotational speed, determining whether an energy of the PMSM is not greater than a threshold value, wherein the energy of the PMSM comprises a potential energy; and in response to the energy of the PMSM not being greater than the threshold value, starting to control the torque for making the PMSM rotate in a forward direction.