| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to supply restricted power continuously without giving shock even though a current detected value indicates anomaly by providing PWM drive for both the transistors inserted to a power supply side and ground side when a current detection value is not normal. SOLUTION: Control means 20 is equipped with anomaly judging means 22 for outputting an anomaly judging signal E to drive control signal generating means 22. The drive control signal generating means 22 responds to an anomaly judging signal E when a current detection value Id indicates anomaly and performs PWM drive for both transistors (such as Q1 and Q4) inserted to power source 3 side and ground GND side. A stop condition judging means 26 outputs a stop signal S for a relay 4 when stop condition is fulfilled and feeding to H bridge 1 is stopped. Thus, even though a current detection value shows anomaly, a continuous supply of restricted power becomes possible without giving shocks. |
