| 摘要 |
PURPOSE:To prevent the braking phenomenon caused by the back electromotive force by mounting a flywheel diode on a motor which drives the output regulation means for an engine and cutting the current through the flywheel diode when the motor current is cut. CONSTITUTION:A throttle valve 1 which is the output regulation means for an engine is driven to be opened and closed by the normal and the reverse revolution of a motor 3. The motor 3 is controlled by a throttle controller 4, a servo controller 5 and a driving circuit 6. Four transistors Tr1 to Tr4 which turns the motor 3 in the normal and the reverse direction are integrated into the driving circuit 6. A flywheel diode and a plurality of relays 17 to 20 are connected in series between the emitter and the connector of each pair of the transistors Tr1 to Tr4. Each of the relays 17 to 20 is controlled by the signal which is the current cutting signal of the CPC 9 in the servo controller 5 amplified by an amplifier 21. |
