Circuit for eliminating current noises from d.c. motor

Details Circuit for eliminating current noises from d.c. motor Circuit for eliminating current noises from d.c. motor

1975-05-27

1977-09-13

Dobeck, B.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

307 90, 318460, H02P 516

Patent

active

040485498

ABSTRACT:
A circuit for eliminating a.c. noise current which is produced as a result of the interruption of electrical contact between a brush and a commutator of a d.c. motor and comprises a capacitor which applies the noise current to a transistor, which in turn inverts the waveform of the current and applies it in an inverted phase to a power source for the motor, thereby cancelling the a.c. noise.

REFERENCES:
patent: 1490031 (1924-04-01), Schmidt
patent: 3214668 (1965-10-01), Brinster
patent: 3336517 (1967-08-01), Cain
patent: 3564370 (1971-02-01), Catherin
patent: 3737748 (1973-06-01), Teders

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