Load balancing system for ups rectifiers

Details Load balancing system for ups rectifiers Load balancing system for ups rectifiers

1977-07-18

1978-09-12

Schaffer, Robert K.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Load current control

307 66, H02J 338

Patent

active

041140486

ABSTRACT:
In order to maintain a balanced load between power rectifiers operating in parallel within an uninterruptible power system, individual closed loops are established for regulating the direct current voltage at the output of the rectifiers and an open loop generates a reference voltage for each of such regulations. An operational amplifier is used as a current source to develop a current representative of the load in a particular rectifier. Parallel current dissipating resistors between each rectifier line and a floating potential common to all rectifier lines generates a reference voltage which is proportional to the average of such current dissipations and represents the average rectifier load.

REFERENCES:
patent: 3014171 (1961-12-01), Cham et al.
patent: 3621365 (1971-11-01), Beck
patent: 3864620 (1975-02-01), Abbondanti
patent: 3956638 (1976-05-01), Ahrens et al.

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