POWER SUPPLY TO PROTECT OPEN LOAD USING ELECTROMAGNETIC INDUCTION

摘要

A power supply device for detecting the open state of load by using electromagnetic induction is provided to detect current flowing on a current counterpoise unit by using electromagnetic induction, thereby facilitating the insulation design of a transformer. A power supply unit(210) supplies driving power for running one or more load. A current counterpoise unit(220) maintains the current balance of the driving power supplied to each load. A detection unit(230) detects current flowing in the current counterpoise unit through the electromagnetic induction, and the detection unit outputs a detection signal. A controller(240) determines open existence and nonexistence of the load according to the detection signal.