Automatic overvoltage protection for an alternator in a locomoti

Details Automatic overvoltage protection for an alternator in a locomoti Automatic overvoltage protection for an alternator in a locomoti

1994-09-23

1996-06-18

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Generator protective circuits

361 18, 361 21, 361115, H02H 708

Patent

active

055284442

ABSTRACT:
A shorted diode protection system for a traction vehicle propulsion system including a synchronous generator having armature and field windings and a bridge rectifier circuit coupling the generator armature windings to a traction motor employs a normally non-conducting solid-state controllable electric valve in parallel with the generator field windings. When a rectifier diode of the bridge rectifier circuit fails short, an a-c current is reflected into the generator field winding circuit. Upon detection of this reflected current, the valve is switched into a conducting state, thereby limiting the voltage on the generator field windings.

REFERENCES:
patent: 4486801 (1984-12-01), Jackovich
patent: 5168416 (1992-12-01), Bailey et al.
patent: 5206776 (1993-04-01), Bodenheimer
patent: 5245495 (1993-09-01), Bailey et al.

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