Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1983-09-21
1986-06-10
Gellner, Michael L.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
198769, 318128, 323289, 363 56, 361 87, 361190, 361203, H01H 4732
Patent
active
045946361
ABSTRACT:
An electrical drive circuit arrangement to control the energization of a reactive load with a high voltage including a control stage, an electrically isolating control signal transformer and an output stage including power control semiconductor devices and having an energization input for a high voltage electrical supply and an output for the connection of a reactive load, the high voltage being prevented from reaching the control stage via the input of the output stage by the isolating transformer, the control stage including a noise-resistant guard responsive to circuit condition signals to permit or prevent generation of the control signal, the transformer restricting the signal to the output stage to a permitted control signal and the output stage generating a protection signal on a current surge in a connected reactive load, the protection signal being a potential low enough for direct application to the control stage without the need for isolating transfer to protect against the high voltage reaching the control stage and the control stage responsive to the protection signal to act on the control signal and remove any energization of the load by the output stage and protect the stage.
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"Linear IC of the Month", from Electronics Industry, Nov. 1982.
Hamer Arthur
Pardoe Beverley H.
Gellner Michael L.
National Research Development Corporation
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