| 摘要 |
A motor deceleration method for a motor driving system is provided. The motor driving system outputs a driving signal containing a voltage value, a current value and a frequency value for driving a motor. When a deceleration of the motor is launched, the descent speeds of the voltage value and the frequency value are controlled according to a preset deceleration time period. Then, a voltage compensation value is generated according to a result of comparing the current value with a preset current level, and the voltage value is increased according to the voltage compensation value, so that the current value is increased to the preset current level. According to a frequency compensation value, the current value is increased to and maintained at the preset current level. Finally, the rotating speed of the motor is gradually decreased to a preset speed. |
| 主权项 |
1. A motor deceleration method for a motor driving system, the motor driving system being configured to drive a motor, the motor driving system comprising a motor driver, a current sensor and a traction energy controller, the motor driver comprising a converter and a voltage-regulator capacitor electrically connected with an input terminal of the converter, the converter outputting a driving signal containing a voltage value, a current value and a frequency value for driving the motor, the motor deceleration method comprising steps of:
(a) controlling descent speeds of the voltage value and the frequency value of the driving signal according to a preset deceleration time period when a deceleration of the motor is launched; (b) the traction energy controller issuing a voltage compensation value according to a result of comparing the current value with a preset current level, and increasing the voltage value according to the voltage compensation value, so that the current value is increased to the preset current level, wherein the traction energy controller further provides a frequency compensation value to control the frequency value, wherein according to the frequency compensation value, an electrical energy is fed back from the motor to the motor driving system to adjust a DC voltage of the voltage-regulator capacitor, so that the voltage value is increased and the current value is correspondingly increased to and maintained at the preset current level; and (c) if the current value fails to be maintained at the preset current level according to the frequency compensation value and the voltage compensation value, the traction energy controller gradually decreasing the voltage compensation value to zero, so that a rotating speed of the motor is gradually decreased to a preset speed. |
