Proportional DC power control system and method

Details Proportional DC power control system and method Proportional DC power control system and method

1996-12-06

1997-11-18

Ro, Bentsu

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

219507, 219520, 219538, G01R 3126, H02M 712

Patent

active

056894112

ABSTRACT:
A control circuit is disclosed which uses AC power input and provides DC power output which is not limited by DC semiconductor switch power dissipation capabilities. Switching is performed on the AC signal to provide time proportional AC power which is then transformed and rectified to provide relatively high proportional or adjustable power to a DC load without electrical noise. The DC load is monitored for a controlled characteristic, such as temperature, and a monitor signal is provided to a control for controlling the time proportional AC power output, in accordance with the DC load demand. A dimensionally stable temperature controlled semiconductor test chuck is described presenting a DC heater load for the control circuit.

REFERENCES:
patent: 3890556 (1975-06-01), Melling et al.
patent: 3944909 (1976-03-01), Reymond
patent: 3979671 (1976-09-01), Meeker et al.
patent: 4046991 (1977-09-01), Sefton et al.
patent: 5001423 (1991-03-01), Abrami et al.

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