Power converter circuit and method for controlling

A power converter circuit (23) and a method for controlling current in a transformer (16). The power converter circuit (23) includes a controller circuit (60), a duty cycle detector circuit (61), a soft start circuit (62), and a switch (63). The switch (63) controls the current in the transformer (1...

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Bibliographic Details
Main Authors ALBERKRACK JADE H, HALL JEFFERSON W
Format Patent
LanguageEnglish
Published 22.07.2003
Edition7
Subjects
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
BASIC ELECTRONIC CIRCUITRY
CONTROL OR REGULATION THEREOF
CONTROLLING
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
PHYSICS
PULSE TECHNIQUE
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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Summary:A power converter circuit (23) and a method for controlling current in a transformer (16). The power converter circuit (23) includes a controller circuit (60), a duty cycle detector circuit (61), a soft start circuit (62), and a switch (63). The switch (63) controls the current in the transformer (16). The controller circuit (60) cooperates with the soft start circuit (62) to alter the duty cycle of the switch (63). During initial start-up, the switch (63) operates at a minimum duty cycle and increases towards a maximum duty cycle to prevent transformer (16) saturation and potential failure of the switch (63). In addition, the duty cycle detector circuit (61) alters the frequency at which the switch (63) turns on and off to reduce the power consumption of the power converter circuit (23).
Bibliography:Application Number: US20020184539