| 摘要 |
PROBLEM TO BE SOLVED: To provide a relay control device which can control the off-operation sound of a mechanical relay. SOLUTION: The relay control device includes a mechanical relay which opens/closes the power supply route between an inductive load and a power supply for supplying power to the inductive load, and a control section which controls the opening/closing operation of the mechanical relay, based on the energization of a winding included in the mechanical relay. The control section has a bypass circuit connected in parallel with the winding and including two routes, through which a current induced by induction electromotive force produced in the winding, when conduction thereof is interrupted flows, and a section which selects either of the two routes as a route through which the induction current flows. One of the two routes includes a Zener diode, connected in the reverse direction with respect to the induction electromotive force, and the Zener diode is not included in the other route. COPYRIGHT: (C)2010,JPO&INPIT
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