Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2007-10-15
2010-10-26
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S041000, C363S056110
Reexamination Certificate
active
07821798
ABSTRACT:
Provided is a high voltage power supply which includes a controller to provide a PWM signal and a power signal, an input unit to receive the PWM signal provided from the controller, a comparison unit to control output of the power signal supplied from the controller by comparing a signal filtered to a DC voltage by the input unit to a voltage reference signal, a transformation unit to transform the power signal output from the comparison unit, and a rectification unit to rectify the signal output by the transformation unit, wherein the high voltage power supply further includes a power input delay unit to delay the supply of the power signal to the comparison unit by a predetermined time from when the power supplied from the controller for input into the comparison unit. The high voltage power supply can prevent components of a device from being damaged due to sudden voltage surge in an output power output from an output terminal, which can occur when a time at which a PWM signal is transitioned to a HIGH state. The power signal is delayed with respect to a time at which a high voltage driving power 24 [V] is initially supplied.
REFERENCES:
patent: 6198638 (2001-03-01), Lee
patent: 6801068 (2004-10-01), Yin
patent: 7035119 (2006-04-01), Koike
patent: 7088597 (2006-08-01), Cho
patent: 2005/0259448 (2005-11-01), Koike
patent: 2006/0092672 (2006-05-01), Cho et al.
Cho Jong-hwa
Oh Chul-woo
Han Jessica
Samsung Electronics Co,. Ltd
Stanzione & Kim LLP
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