Brushless d-c motor system

Details Brushless d-c motor system Brushless d-c motor system

1981-03-06

1983-02-15

Truhe, J. V.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318254, H02K 2902

Patent

active

043743471

ABSTRACT:
To provide for efficient operation and recuperation of stored inductive energy in a pulse-operated motor, a preferably bifilar winding (20, 21; 20', 21') has its respective strands or filaments energized by complementary transistors (57, 58; 69, 75; 80, 81) which have reversely polarized free-wheeling diodes (59, 60; 80", 81") connected thereacross. A coupling capacity (47) is connected between the junctions of the respective transistors and the associated winding so that, upon turn-off of a transistor, as controlled by a rotor position sensor, such as a Hall generator (25), stored electromagnetic energy is coupled to flow through the free-wheeling diode of the transistor then to be connected, to be returned to a d-c source, such as a battery (34) or stored in a storage capacitor (45). The output signal from the rotor position sensor is in binary, high-low form, which can control the complementary transistors.

REFERENCES:
patent: 3555389 (1968-10-01), Opal
patent: 3845379 (1974-10-01), Kawamata et al.
patent: 3927357 (1975-12-01), Konrad
patent: 4005347 (1977-01-01), Erdman
patent: 4030005 (1977-06-01), Doemen
patent: 4099104 (1978-07-01), Muller

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