Apparatus for limiting inrush current
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 30, 1995
Grant Date -
N/A
app pub date -
Dec 30, 1993
filing date -
Dec 30, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit for limiting inrush current in a DC power supply is disclosed. The inrush limiting circuit should be placed between an input AC power line and a power supply input capacitor bank. A thermistor is located between the capacitor bank and the input diode bridge to limit the initial inrush current. Once the input capacitor bank is fully charged, an insulated-gate bipolar transistor or IGBT switches the rectified line voltage to a boost power factor correction converter circuit, which utilizes an inductor and diode along with a field effect transistor to boost the input to a high DC voltage. This high DC voltage blocks the thermistor through use of a diode and keeps it cold to maintain high resistance in case of a new off/on cycle. The IGBT can be replaced with a silicon control rectifier, a triac, or a field effect transistor.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully