Electricity: power supply or regulation systems – Remote sensing
Patent
1975-02-07
1976-06-01
Pellinen, A. D.
Electricity: power supply or regulation systems
Remote sensing
307252UA, 323 20, 323 21, 323 24, G05F 144
Patent
active
039612368
ABSTRACT:
A constant power regulator for a xerographic fuser in which power control is achieved by taking the sum of the load voltage and current. The regulator includes an operational amplifier connected as a voltage adding circuit. The operational circuit amplifier of the power regulator adds the voltage drop across the fuser and a reference resistor connected in series with the fuser and the voltage drop across the fixed reference resistance which represents the current flow through the fuser. The output of this summing circuit is detected by a photodetector that electrically isolates the power regulator from a voltage regulator which has an output for controlling the power supply to the fuser through, for example, a triac, controlled as a function of the power supply signal and the detected voltage generated by the power regulating circuit.
REFERENCES:
patent: 3283179 (1966-11-01), Carlisle et al.
patent: 3458801 (1969-07-01), Polson
patent: 3466572 (1969-09-01), Hanna et al.
patent: 3599037 (1971-08-01), Grace
patent: 3818307 (1974-06-01), Hamilton et al.
van Cleave et al., "Complete Half-Wave Thyrister Control", IBM Tech. Disc. Bull., vol. 16, No. 9, Feb. 1974, p. 2962.
Michaels Thomas B.
Rodek Victor
Pellinen A. D.
Xerox Corporation
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