Reconstruction of BEMF signals for synchronizing the driving of

Details Reconstruction of BEMF signals for synchronizing the driving of Reconstruction of BEMF signals for synchronizing the driving of

1997-07-28

1998-11-17

Ro, Bentsu

Electricity: motive power systems

Limitation of motor load, current, torque or force

318459, 318705, 318721, H02P 618

Patent

active

058381287

ABSTRACT:
The sensing of BEMF signals in the motor's windings for synchronizing the phase switchings, in driving a brushless and sensorless motor with predefined constant voltage or current values or predefined voltage or current profiles stored permanently in a memory, is greatly simplified through a reconstruction technique that avails itself of the knowledge of the predefined drive values. The sensing does not require access to the center star point and is performed by sensing either the voltage difference between the terminals of two windings or of the current flowing in two windings, depending on whether a current or voltage mode is employed.

REFERENCES:
patent: 4409534 (1983-10-01), Bose
patent: 4618808 (1986-10-01), Ish-Shalom et al.
patent: 5023527 (1991-06-01), Erdman et al.
patent: 5068582 (1991-11-01), Scott
patent: 5221881 (1993-06-01), Cameron
patent: 5367234 (1994-11-01), DiTucci

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