Driver circuit for a D.C. motor without commutator

Details Driver circuit for a D.C. motor without commutator Driver circuit for a D.C. motor without commutator

1988-05-27

1990-05-08

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02P 602

Patent

active

049241567

ABSTRACT:
A method is disclosed for the low-loss regulation of a d.c. motor without commutator and of a semiconductor circuit in which, during a commutation phase at reduced motor power or rpm as given by a position indicator, the end transistors or one end transistor initially operates temporarily as a switch and thereafter temporarily as an analog amplifier element. During the analog period, a current is available which changes slowly according to a ramp function.

REFERENCES:
patent: 4317072 (1982-02-01), Goof et al.
patent: 4525658 (1985-06-01), Yanagida
patent: 4546293 (1985-10-01), Peterson et al.
patent: 4672274 (1987-06-01), Suganuma
patent: 4698563 (1987-10-01), Ban
Angelo Alzati & Antonella Lanati, "Highly Efficient and Precise Brushless Drive System", 1985, SGS Microelectronica SpA, Italy.
Data sheet, "Four Phase Brushless Motor Driver", SGS, 7DA8776, Dec./1986, pp. 819-822, Italy.
Data sheet, "Current Mode PWM Controller", SGS, Dec. 1986, p. 823, Italy.
Data sheet, "Bidirectional Three-Phase Brushless DC Driver", Dec. 1986, pp. 633-640, SGS, Italy.
Data sheet, "Three-Phase Brushless DC Motor Driver", Dec. 1986, p. 641 SGS, Italy.

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