POWER SOURCE

• Main Author: MAESAKA MASAHARU
• Format: Patent
• Language: English
• Published: 29.06.2001
• Edition: 7
• 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; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

PROBLEM TO BE SOLVED: To easily realize synchronizing signals driven in parallel by deviating timing of plurality of inverters, used in an active power factor improving circuit with a simple circuit, even by increasing the number of inverters. SOLUTION: Control circuits 7a, 7b for each of a plurality of inverters 6a, 6b has a triangular wave output terminal 24 for outputting a triangular wave signal from a contained triangular wave oscillator to the exterior and a synchronous input terminal 25 for inputting a synchronizing signal from the exterior to the oscillator. A synchronous circuit 8 outputs a synchronizing signal synchronized with the edge of a comparison signal, when the triangular wave signal of a control IC 7a exceeds a reference value Vref1 by a triangular wave comparator 12 from a synchronizing signal output circuit 13 to a control IC 7b to synchronize the signal by deviating the timing.