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. 13, 2025
Filed:
Apr. 12, 2023
Stmicroelectronics S.r.l., Agrate Brianza, IT;
Giuseppe D'Angelo, Tufino, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A method for controlling a BLDC motor includes controlling the rotational speed or position of the BLDC motor based on a position of the rotor of the motor. The BLDC motor is driven by a three-phase inverter. A PWM signal is generated for three PWM phases, each including a pair of complementary signals with dead-time and having a duty cycle based on the current position of the rotor. The complementary signals are supplied to a respective high side and low side switch of each of three arms of the three-phase inverter, and a zero-crossing time measurement is performed on each of the back electromotive forces. Corresponding signals are obtained indicating the zero-crossing times. Trigger signals are generated, and the occurrence of a time interval corresponding to the dead time in the respective PWM phase is identified. The zero-crossing time measurement is performed during the occurrence of the dead-time.