| 摘要 |
<p>PURPOSE:To improve a steering characteristic especially in an industrial vehicle so that steering may be light at the time of steering without driving and a moderate steering feeling can be obtained during travelling. CONSTITUTION:Either of a car-speed sensor and a load sensor for detecting the travelling state of a vehicle is provided. Based on the travelling state detection value by the sensor, a voltage limiter limits control voltage in response to the steering torque detection value by a torque sensor, restricts a maximum value of duty ratio of pulse output of a pulse duration modulation circuit to change the control voltage to variably control the rotating speed of an electric motor, and thus generates a regenerative control state. As a result, steering responsiveness is changed to improve a steering characteristic.</p> |
