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Title: Capacitor charging fet switcher with controller to adjust pulse width

Abstract

A switching power supply for charging a capacitive load is described which consists of: a step-up transformer having its secondary connected to the load; four power MOSFETs arrayed in a full bridge configuration connected to the primary of the step-up transformer; control means connected to the MOSFETs for alternately switching on and off diagonal pairs of the MOSFETs; soft start means connected to the control means for periodically adjusting pulse width to maintain approximate peak current to the load, the soft start means comprising a timing capacitor, parallel timing resistors of different values connected to the timing capacitor, and selection means for sequentially selecting one of the timing resistors for discharging the timing capacitor with a time constant determined by the value of the selected timing resistor.

Inventors:
Publication Date:
OSTI Identifier:
5747504
Patent Number(s):
US 4586118
Assignee:
Dept. of Energy, Washington, DC
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 5 Jun 1984
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; CAPACITORS; MOSFET; SWITCHES; ELECTRIC BRIDGES; ELECTRIC CONTROLLERS; POWER SUPPLIES; PULSES; RESISTORS; TIMING CIRCUITS; TRANSFORMERS; CONTROL EQUIPMENT; ELECTRICAL EQUIPMENT; ELECTRONIC CIRCUITS; ELECTRONIC EQUIPMENT; EQUIPMENT; FIELD EFFECT TRANSISTORS; MOS TRANSISTORS; SEMICONDUCTOR DEVICES; TRANSISTORS; 420800* - Engineering- Electronic Circuits & Devices- (-1989)

Citation Formats

Mihalka, A M. Capacitor charging fet switcher with controller to adjust pulse width. United States: N. p., 1986. Web.
Mihalka, A M. Capacitor charging fet switcher with controller to adjust pulse width. United States.
Mihalka, A M. Tue . "Capacitor charging fet switcher with controller to adjust pulse width". United States.
@article{osti_5747504,
title = {Capacitor charging fet switcher with controller to adjust pulse width},
author = {Mihalka, A M},
abstractNote = {A switching power supply for charging a capacitive load is described which consists of: a step-up transformer having its secondary connected to the load; four power MOSFETs arrayed in a full bridge configuration connected to the primary of the step-up transformer; control means connected to the MOSFETs for alternately switching on and off diagonal pairs of the MOSFETs; soft start means connected to the control means for periodically adjusting pulse width to maintain approximate peak current to the load, the soft start means comprising a timing capacitor, parallel timing resistors of different values connected to the timing capacitor, and selection means for sequentially selecting one of the timing resistors for discharging the timing capacitor with a time constant determined by the value of the selected timing resistor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {4}
}