Fault detector circuit with two-fault memory

Details Fault detector circuit with two-fault memory Fault detector circuit with two-fault memory

1975-10-28

1977-04-12

Pellinen, A. D.

Electricity: motive power systems

Battery-fed motor systems

361 28, H02P 308

Patent

active

040177750

ABSTRACT:
A fault detector circuit in a silicon controlled rectifier (SCR) control for series-connected direct-current motors in which current to the motor flows in pulses through a main SCR as the main SCR is repeatedly turned on and off. If during operation the main SCR shorts, the field winding is disconnected from the armature and maintained disconnected. If during operation the main SCR is not defective but fails to commutate, the field winding is disconnected from the armature and then reconnected thereto. If the main SCR again fails to commutate, the field winding is again disconnected from the armature and is maintained disconnected therefrom.

REFERENCES:
patent: 3766436 (1973-10-01), Zocholl
patent: 3902105 (1975-08-01), Delaney et al.
patent: 3914675 (1975-10-01), Konrad

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