| 摘要 |
In an embodiment, the invention provides a motor control system comprising an adjustable frequency driver coupled between the motor and a power supply, a programmable controller coupled to the driver and operative to control the driver, a set of control signals coupled to the programmable controller, and a set of selectable speed signals coupled to the programmable controller, the programmable controller being programmed to select one of the speed signals and causing same to be transmitted to the driver for controlling the speed of the motor in accordance with the control signals.
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