Motorsteuerung

Details

Veröffentlichungs-Nr.

EP2843825

Aktenzeichen

EP14182196

Anmeldetag

26. August 2014

Veröffentlichung

11. Oktober 2017

Erteilung

11. Oktober 2017

Rechtsraum

EP

IPC

H02P6/12G01R33/09

Abstract

The outputs from a first magnetic detector (11) and a second magnetic detector (12) are supplied to first to fourth output circuits (21, 22, 23, and 24) which are differential amplifiers, whereby detected outputs (S1 and S2) which are analogous to a sine wave and whose positive-negative polarities are opposite to each other, and detected outputs (S3 and S4) which are analogous to a cosine wave and whose positive-negative polarities are opposite to each other are obtained. The detected outputs (S1 to S4) are supplied to a switching circuit (31), and detected output portions are obtained at intervals of 90° from the detected outputs (S1 to S4). A bias adding circuit 33 applies a bias voltage to each of the detected output portions to obtain an angle detection output analogous to a linear function. The angle detection output is used to determine the supply timing at which a three-phase driving current is supplied.

Anmelder

Firma

Alps Electric Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete