UNINTERRUPTIBLE POWER SUPPLY

PROBLEM TO BE SOLVED: To provide an uninterruptible power supply capable of size reduction with simple constitution. SOLUTION: This uninterruptible power supply 10 is composed of a FET bridge circuit 12, a coil 14, a MOSFET 16, a flywheel diode 18, a step-up- and-down transformer 20, a MOSFET 22, a...

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Bibliographic Details
Main Author YUI MASATOSHI
Format Patent
LanguageEnglish
Published 11.08.2000
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 ELECTRIC ELEMENTS
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
SYSTEMS FOR STORING ELECTRIC ENERGY
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Summary:PROBLEM TO BE SOLVED: To provide an uninterruptible power supply capable of size reduction with simple constitution. SOLUTION: This uninterruptible power supply 10 is composed of a FET bridge circuit 12, a coil 14, a MOSFET 16, a flywheel diode 18, a step-up- and-down transformer 20, a MOSFET 22, a smoothing circuit 24, a battery 26, and a rectifier diode 28. Input voltage rectified by the FET bridge circuit 12 at the time of charging is once boosted by the coil 14 and inputted into the step-up-and-down transformer 20 by the switching operation of the MOSFET 16. On the other hand, at the time of discharging, a parasitic diode component included in the MOSFET 16 acts as a flywheel diode. It is thus possible to provide the uninterruptible power supply 10 only by using one step-up-and-down transformer 20 without need for mounting step-up and step-down transformers separately.
Bibliography:Application Number: JP19990026398