| 摘要 |
PURPOSE:To prevent the generation of chattering operation in the speed-change drive of auxiliaries by variably controlling the revolution speed of the auxiliaries on the basis of the engine revolution speed and the duties of the conduction time and the nonconduction time of the rotor coil of an alternator. CONSTITUTION:In order to detect the conduction and nonconduction duties of a rotor coil 2 through the ground-side terminal 2d out of the slip rings 2c and 2d of an alternator 2, the output VF of the terminal 2d on the ground side is input into a microcomputer 24 through a buffer 25 and an FF26. In the microcomputer 24, the duty ratio T1/T2 of the electric conduction time of the rotor coil 2b is obtained from each ON time T1, T2 of the outputs Q1 and Q2 of the buffer 25 and the FF26. The rotary coil 10 of an electromagnetic clutch for controlling the drive of auxiliaries is ON/OFF controlled by using the engine revolution speed data detected by a revolution-speed detector not shown in the figure. When the terminal voltage of a battery 21 becomes over a certain value, electric conduction is cut-off by an alternator control circuit 23, and power generation is brought into stop.
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