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PIC16F72Ë«Ïò±äƵ¿ØÖƵ¥£¬ÈýÏàÒì²½µç¶¯»úµÄʹÓã¬×¢ÒâÊÇÓ¢ÎÄ˵Ã÷¡£The motor is energized with a single-phase AC power Author: Padmaraja Yedamale supply, with a capacitor connected in series with the Microchip Technology Inc. start winding (also called an auxiliary winding) as shown in Figure 1. The value of the capacitor is chosen so that the total impedance on the auxiliary winding produces sufficient phase shift in current to generate a rotating magnetic field in the air gap. Typically, the current flowing through the start winding leads the current flowing through the main winding by 90 degrees. By adding a microcontroller-based control circuit to the motor, the voltage across the main winding and start winding can be maintained at 90 degrees to each other. The other advantage is that the starting capacitor can be removed from the circuit, thus reducing the total system cost.£¬ ´óС£º427 KB