Current fed regulated voltage supply

Details Current fed regulated voltage supply Current fed regulated voltage supply

1986-02-14

1987-10-06

Salce, Patrick R.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

323223, 323357, 323358, H02M 7155

Patent

active

046987401

ABSTRACT:
The invention is a locally isolated regulated power supply providing a regulated dc power output from an ac current source having a large dynamic range. The power supply comprises an ac-to-dc converter for providing a rectified dc output from an ac current input. The converter includes a current transformer in combination with a rectifier. The current transformer has a saturable magnetic core for receiving primary and secondary windings. The current transfomer produces a reduced secondary output voltage that is a function of the ac system current characterized by the decreased coupling between the core and secondary winding as the core approaches saturation during substantial increases in the ac system current. One or more secondary windings and associated circuitry can be provided. In addition, an electronically controlled switch or shunt having as inputs a predetermined reference voltage and the dc output voltage of the rectifier or a signal equivalent thereto is connected across the converter. The switch provides for the continual shunting of the converter whenever the dc output voltage is equal to or greater than the predetermined reference voltage. A voltage support capacitor is connected across the output of the converter for maintaining the output voltage proportional to the selected reference voltage. An isolation diode is used to isolate the voltage support capacitor from the converter during those periods of time when the converter is being shunted by the electronically controlled switch. This prevents the discharge of the capacitor.

REFERENCES:
patent: 3369167 (1968-02-01), Hanchett
patent: 3906337 (1975-09-01), Depenbrook
patent: 4001537 (1977-01-01), Burke et al.

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