Detecting circuit for three-phase input and an alternative current power supply with the same

• Main Authors: CHEN, CHUAN-HUNG, HUANG, CHIHUNG
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2009
• 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; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

An alternative current power supply with a detecting circuit utilized for detecting a three phase power supply is correctly connected or not. The detecting circuit has a neutral end, three phase voltage input end, and at least a /Y switching circuit. Wherein, the neutral end is utilized for connecting to a neutral line of the three phase power supply. The phase voltage input ends are utilized for connecting to three phase voltage input line of the three phase power supply. The /Y switching circuit is connected to the neutral end and two of the three phase voltage input ends so as to generate single-phase signal. Each /Y switching circuit has a /Y judging unit, a /Y switching unit, a potential judging unit, and an operational switch. The /Y judging unit is utilized for judging whether the three phase power supply is -connected or Y-connected by detecting potential differences among the neutral end and two phase voltage input ends. The /Y switching unit is utilized for selectively outputting two of the signals