Transient voltage protector

Details Transient voltage protector Transient voltage protector

1993-05-27

1994-07-26

Voeltz, Emanuel T.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

361 56, 361111, H02H 7122, H02H 900

Patent

active

053331052

ABSTRACT:
An approved apparatus is provided to protect an electrical device in a vehicle against transient changes in voltage provided by a power source. The transient voltage protector is connected with a conductor which conducts current from the power source to the electrical device. The transient voltage protector responds to the rate of change of voltage in the conductor to shunt at least a portion of the electrical current in the conductor away from the electrical device when the rate of change of voltage in the conductor exceeds a predetermined rate. The transient voltage protector includes a high pass filter which provides an output signal when the rate of change of voltage in the conductor exceeds a predetermined rate. In response to the output from the high pass filter, a combined comparator and shunt controller effects operation of a shunt switch from an open condition to a closed condition. This completes a path through which current is directed away from the electrical device.

REFERENCES:
patent: 4008418 (1977-02-01), Murphy
patent: 4134101 (1979-01-01), Jones, Jr.
patent: 4916572 (1990-04-01), Guajardo
patent: 5189587 (1993-02-01), Haun et al.
patent: 5223795 (1993-06-01), Blades

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