| 摘要 |
PROBLEM TO BE SOLVED: To provide a control method by which output response can be performed to eliminate the dead zone, even with respect to an input difference signal being about zero in the PWM driving method. SOLUTION: When PWM control is performed by connecting an actuator 9 between the output terminals of a bridge circuit constituted of switching elements 121, 122, 221, and 222 and turning on power to the actuator 9 with signals G1U, G1L, G2U and G2L, driving timing signals are generated with a time interval (dead time) during which the switching elements 121, 122, 221, and 222 are simultaneously turned off, and the actuator 9 is driven so as to have no overlapping dead time between a pair of half-bridge circuits, thereby achieving response, even with a differential input PWM signal (S51-S52) having a small time difference. COPYRIGHT: (C)2007,JPO&INPIT
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