Electric power conversion systems – Current conversion – Including automatic or integral protection means
Reexamination Certificate
2006-09-19
2006-09-19
Vu, Bao Q. (Department: 2838)
Electric power conversion systems
Current conversion
Including automatic or integral protection means
C323S284000, C323S908000
Reexamination Certificate
active
07110271
ABSTRACT:
An inrush current prevention circuit for a DC-DC converter is provided and in preferred aspects comprises a switching element that transforms an input voltage by being switched on and off and outputs the transformed voltage. A filter filtrates the outputted voltage, transformed via the switching element, and outputs the filtrated voltage as an output voltage. A reference voltage generator generates a reference voltage. An error amplifier compares the reference voltage and output voltage and outputs an error signal. A Pulse Width Modulation (PWM) signal generator generates a PWM signal to switch on and off the switching element according to the error signal. An on-off circuit either transmits or isolates the PWM signal to the switching element. An Electronic Control Unit (ECU) controls the on-off circuit. Preferred systems of the invention can prevent an inrush current immediately following power input or during reactivation of the DC-DC converter.
REFERENCES:
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patent: 5045989 (1991-09-01), Higaki et al.
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Jang Sang-Hyun
Jeong Jae-Hun
Kim Jong-Dae
Lee Kyu-Chan
Corless Peter F.
Edwards Angell Palmer & & Dodge LLP
Hyundai Motor Company
Vu Bao Q.
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