Title :
A full-wave motor drive IC based on the back-EMF sensing principle
Author :
Bahlmann, J.P.M.
Author_Institution :
Philips Consumer Electron., Eindhoven
fDate :
8/1/1989 12:00:00 AM
Abstract :
A bipolar IC has been designed which allows full-wave driving of brushless three-phase DC motors. The three push-pull power stages operate in a switching mode. The commutation moments are directly derived from the zero-crossings of the back-EMF (electromotive force) in the floating motor windings. A start-up system will generate communications when no zero-crossing can be detected. A highly accurate tach-signal is defined by the EMF zero-crossings. This IC offers the possibility of accurate full-wave motor-driving without extra sensors in the motor
Keywords :
DC motors; bipolar integrated circuits; driver circuits; electric potential; back-EMF sensing principle; bipolar IC; brushless three-phase DC motors; commutation moments; electromotive force; floating motor windings; full-wave motor drive IC; push-pull power stages; start-up system; switching mode; tach-signal; zero-crossings; Bipolar integrated circuits; Brushless DC motors; Brushless motors; Coils; Commutation; Consumer electronics; DC motors; Delay; Motor drives; Voltage;
Journal_Title :
Consumer Electronics, IEEE Transactions on
