| 摘要 |
PURPOSE:To prevent the occurrence of a fire attendant upon the generation of heat in a motor and a harness as well as of any damages and the like attributable to overload in a driving circuit itself, by installing a current limit circuit in space between a driving motor of an adjuster for car's damping force adjustment and the driving circuit. CONSTITUTION:When a driving shaft 4a of a driving motor 4 for a damping force adjuster 8 between a car body and an axle happens to be locked during rotation for driving whereby an overcurrent is produced at the motor 4 side, a potential difference beyond the specified value is produced between the motor 4 side of a potential difference generating resistance 30 and a transistor 29 side, so that a transistor 32 comes into a state of being turned on, and thereby part of a base current of the transistor 29 flows into a collector terminal of the transistor 32. Therefore, the base current of the transistor 29 decreases as much as for a portion of the outflow and since a collector current is also decreased, a flow rate in an excessive driving current flowing into the motor 4 from a power source 28 can be limited by action of the transistor 32. Accordingly, and damages to these driving systems following the generation of heat in the motor 4 and the harness can be prevented from occurring. |
