公开(公告)号：US20240039437A1

公开(公告)日：2024-02-01

申请号：US18264163

申请日：2021-02-25

Applicant: TECHTRONIC CORDLESS GP

Inventor： Hai Ming LUO ,  Hai Bo MA ,  Yong Sheng GAO

IPC: H02P6/18 ,  H02P6/182 ,  H02P6/20

CPC classification number: H02P6/181 ,  H02P6/182 ,  H02P6/20

Abstract: A method of controlling a sensorless motor (32). The method contains the steps of determining a current speed of the motor (32); selectively using a first method, a second method, or a third method to determine a position of a rotor of the motor (32), depending on the current speed of the motor (32); and transmitting a drive signal to the motor (32) based on the determined position of the rotor. A sensorless motor assembly is also disclosed. According to the method, multiple rotor position detection methods are provided to the sensorless motor (32) which cover a full speed range of the motor (32).