Wellenformung in einer Werkzeugmaschine mit Wechselstromversorgung

Details

Veröffentlichungs-Nr.

EP3386096

Aktenzeichen

EP17168358

Anmeldetag

27. April 2017

Veröffentlichung

4. August 2021

Erteilung

4. August 2021

Rechtsraum

EP

IPC

H02P23/26H02P6/00

Abstract

A power tool is provided including a brushless DC (BLDC) motor, a rectifier that receives an alternative current from a power supply and outputs a rectified signal supplied to a DC power bus, and an inverter circuit having motor switches connected electrically between the DC power bus and the motor. A control module controls a switching operation of the power switches to regulate supply power from the power supply to the motor. The control module controls the switching operation so as to, within a half cycle of the AC power supply voltage waveform, increase current draw from the power supply from a first threshold at or after a first zero-crossing of the half cycle up to a second threshold, and reduce current draw from the power supply from the second threshold up to a third threshold at or prior to a second zero-crossing of the half cycle.

Anmelder

Firma

Black & Decker Inc.

Land

🇺🇸 USA

Fachgebiete