Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Patent
1974-11-26
1976-10-12
Rubinson, Gene Z.
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
318254, H02K 2900
Patent
active
039860868
ABSTRACT:
Control semi-conductor switches, such as switching transistors, are connected to the armature windings of the rotor, which has a permanent magnet rotor; the semi-conductor switches are energized by pulses derived from the control circuit, which includes a sensing circuit, such as diodes connected to the armature windings, to sense induce d-c voltages in the state of winding during operation of the motor, and a phase shift circuit, such as a multi-stage filter, phase shifting the sensed d-c voltages by, preferably about 180.degree.-electrical, the phase shifted signals then being used to control the timing of energization of the semi-conductor switches, for example by comparison of instantaneous values of the phase shifted d-c voltages with respect to a reference, so that the maximum current flow, due to pulse energization, will occur at the time of maximum induced voltages, and for a period of time depending on the relative instantaneous value of the phase shifted d-c voltage with respect to a reference voltage, resulting in optimum efficiency of operation of the motor.
REFERENCES:
patent: 3304481 (1967-02-01), Saussele
patent: 3611081 (1971-10-01), Watson
patent: 3873897 (1975-03-01), Muller
Papst-Motoren KG
Rubinson Gene Z.
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