Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Patent
1975-07-14
1976-12-21
Dobeck, B.
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
318254, H02K 2900
Patent
active
039991083
ABSTRACT:
A speed regulation system for DC motors of the type comprising a rotor having magnetic poles of opposite polarities, a stator having at least one pair of flux-producing windings positioned in torque producing relation with the rotor, and Hall generators positioned in fixed relation to the stator and angularly spaced apart from each other in magnetic relation to the rotor so as to sense the magnitude of the rotor flux density as a function of the angular position of the rotor. The speed regulation system comprises a circuit for detecting the frequency of the output signals of the Hall generators so as to generate the pulse signals representing the peak values of the output signals, a phase shifter for shifting the phase of the pulse signals, and a wave shaping circuit for generating the signals with a desired waveform in response to the output signal of the phase shifter. In response to the output signals of the wave shaping circuit a drive circuit for supplying the driving current to the stator windings is controlled, whereby the DC motor may be rotated at a constant speed.
REFERENCES:
patent: 3584280 (1971-06-01), Inagaki
patent: 3743902 (1973-07-01), Perkins
patent: 3743906 (1973-07-01), Torok
patent: 3754175 (1973-08-01), Girault
patent: 3775648 (1973-11-01), Brown
Canon Kabushiki Kaisha
Canon Seiki Kabushiki Kaisha
Dobeck B.
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