Device for the correction of the power factor in power...

Details Device for the correction of the power factor in power... Device for the correction of the power factor in power...

2006-01-10

2006-01-10

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

For reactive power control

Using converter

C323S222000, C323S285000

Reexamination Certificate

active

06984963

ABSTRACT:
A device is described for the correction of the power factor in power supply units with forced switching operating in transition mode. Said device comprises a converter and a control device coupled with said converter so as to obtain a regulated voltage on the output terminal from an alternating network input voltage. The converter comprises a power transistor whilst the control device comprises a pilot circuit suitable for determining the switch-on time and the switch-off time of the power transistor. The control device furthermore comprises control means coupled with said pilot circuit and with said converter and capable of prolonging the switch-on time of the power transistor at the instants of time wherein the alternating network voltage substantially takes on the value zero.

REFERENCES:
patent: 5349284 (1994-09-01), Whittle
patent: 5867379 (1999-02-01), Maksimovic et al.
patent: 5949229 (1999-09-01), Choi et al.
patent: 6222746 (2001-04-01), Kim
patent: 6657417 (2003-12-01), Hwang
patent: 2001/0038545 (2001-11-01), Hooijer et al.
patent: 0 582 813 (1994-02-01), None

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