Brushless DC motor driven by complementary type transistors

Details Brushless DC motor driven by complementary type transistors Brushless DC motor driven by complementary type transistors

1981-04-01

1983-04-12

Truhe, J. V.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2900

Patent

active

043799841

ABSTRACT:
A first pair of complementary transistors with their collectors connected to one terminal of the motor winding are alternately switched on by a rectangular wave produced by a Hall-IC responding to the magnetic field of a permanent magnet rotor, the square wave being coupled to these transistors through a resistor network and series capacitors. At the same time, another pair of complementary transistors, having their emitters connected to the other terminal of the motor winding, is directly switched by the Hall-IC, so that they operate as voltage followers to complete the path of the current pulses of the winding through the other half of a full-bridge circuit. Thus, one signal from a single sensor of rotor position operates a stator winding with full protection of the components while using a minimum of circuit elements. Such a motor makes possible ventilating fans of small axial length for use in compact apparatus.

REFERENCES:
patent: 3025443 (1962-03-01), Wilkinson et al.
patent: 3453513 (1969-07-01), Rakes et al.
patent: 4025831 (1977-04-01), Webb
patent: 4286198 (1981-08-01), Valroger

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