Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1978-01-11
1981-01-27
Rubinson, Gene Z.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318346, 318361, 318439, 318541, H02P 724
Patent
active
042478081
ABSTRACT:
The commutator or commutators of a DC motor are uniquely arranged with a plurality of peripherally spaced, current carrying segments separated by relatively large, electrically dead, non-conducting spaces, each of the dead spaces being at least as wide in a peripheral direction as the corresponding width dimension of the brushes positioned adjacent thereto. A silicon controlled rectifier (SCR) is arranged in the circuit between the negative pole of the voltage source and the commutator input terminal and acts as a switch to automatically cut off current flow therethrough each time a brush leaves a commutator segment. The current is not re-established until the SCR is again gated, which time may be varied by a variable resistor/capacitor gating circuit.
To prevent stoppage of the motor with the brushes of the commutator in a dead space a plurality of commutators are provided with the segments thereof staggered with relation to the first. Each of the additional commutators is provided with its own SCR time delay circuit for automatically cutting off and re-establishing current to the segments of the additional commutator(s).
REFERENCES:
patent: 3302088 (1967-01-01), Wigington
patent: 3437898 (1969-04-01), Bates
patent: 3453513 (1969-07-01), Bates et al.
patent: 3544868 (1968-01-01), Bates
patent: 3940644 (1976-02-01), Manz
Indyk Eugene S.
Rubinson Gene Z.
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