| 摘要 |
<p>A PWM speed regulating apparatus for a DC elevator comprises a rectifier and filter (1), voltage suppressor (2), chopper voltage regulator (3), system controller (4) and a driving protector (5). The speed of DC motor is regulated by a pulse width modulating mode so that the current of the motor is maintained continuously and the ripple of current and torque is lower, and which ensures a good riding quality and a high floor arrival accuracy. <IMAGE></p> |
