Electricity: power supply or regulation systems – For phase shift or control – Using a three or more terminal semiconductive device
Patent
1982-04-05
1984-06-26
Shoop, William M.
Electricity: power supply or regulation systems
For phase shift or control
Using a three or more terminal semiconductive device
307252N, 323300, 363 85, 361 94, G05F 500
Patent
active
044568711
ABSTRACT:
An inexpensive power supply for an electconic control system or the like which is capable of converting a wide range of applied AC voltages into a regulated output voltage. A thyristor is coupled in series with an input terminal and a threshold device, such as a Zener diode, placed across the input terminals and paralleled by an RC circuit coupled to the thyrisor gate. Another capacitor is coupled to the thyristor cathode. A ramp-like voltage impressed on the thyristor gate effects triggering at a phase angle which varies in accordance with output voltage. The electronic control system outputs a uniform train of pulses which serve to disable a circuit interrupter. Termination or disruption of the pulse train causes the interrupter to open the protected circuit.
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General Electric Lod-Trak, II(.TM.) Solid State Motor Protection Instructions, pp. 39-40, 46-51 and 58-60, Aug. 1979.
"Programmable AC Motor Protection", Davis et al., Based on a Paper Published in Tappi '78 Engineering Conference Proceedings.
IEEE Transaction Paper, T74029-5, "Thermal Tracking-A Rational Approach to Motor Protection", Boothman et al., Nov. 1973.
James John L.
Shoop William M.
Siemens-Allis, Inc.
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