Einschalt-Selbsttestverfahren für ein Elektrowerkzeug und Elektrowerkzeug

Details

Veröffentlichungs-Nr.

EP3852267

Aktenzeichen

EP21150136

Anmeldetag

5. Januar 2021

Veröffentlichung

7. Juni 2023

Erteilung

7. Juni 2023

Rechtsraum

EP

IPC

H02P29/024H02P6/18

Abstract

Provided are a power-on self-test method for an electric power tool and an electric power tool. The power-on self-test method includes steps described below. In response to monitoring a power-on signal of the electric power tool, a controller outputs a driving signal to a motor driving circuit and acquires a position of a rotor of a brushless motor. During acquiring the position of the rotor of the brushless motor, a phase voltage or a line voltage of a winding of the brushless motor is detected through the voltage detection circuit. Whether an upper bridge arm switching element, a lower bridge arm switching element, and/or the brushless motor is short-circuited is determined according to the phase voltage or the line voltage of the winding of the brushless motor. In the solution provided by embodiments of the present disclosure, during detecting the position of the rotor of the brushless motor, whether the switching element and the brushless motor are short-circuited is determined according to the phase voltage or the line voltage of the winding of the brushless motor, so as to reduce the risk of burning machine when the electric power tool is turned on. This method is simple and quick, and can save the boot time of the electric power tool.

Anmelder

Firma

Nanjing Chervon Industry Co., Ltd.

Land

🇨🇳 China

Fachgebiete