To provide a power system that can shorten an update cycle of a duty signal for a DC-DC converter 12 and determine whether there is an anomaly in the power system.
A first control circuit 16 and a second control circuit 18 each generate duty signals such that on periods of switching elements Sp1, Sn1, Sp2, Sn2 do not overlap on the basis of duty signals output from the control circuits 16, 18, whose input includes a detection value of an output side voltage sensor 26. The detection values input into the first control circuit 16 and the second control circuit 18, respectively, are compared to determine whether or not there is an anomaly in the power system. If the determination finds an anomaly in the power system, on times of the duty signals output from the control circuit that corresponds to the shorter on times of the duty signals of the first control circuit 16 and the second control circuit 18 are doubled.
Yasunari Kurita
Kyoko Hino
Satoru Ando
Hiroshi Matsuda