The process of AC motor capacitors to achieve phase starting is a complex but crucial link, which involves the starting characteristics of the motor and the electrical characteristics of AC motor capacitors.
First, the AC motor needs to overcome a certain torque to start rotating when starting. In order to provide additional power to overcome this torque, we usually connect an AC motor capacitor in parallel to the starting coil of the motor. This AC motor capacitor plays a key role in starting. It can provide an additional current, which interacts with the starting winding current of the motor to increase the torque of the motor.
The reason why AC motor capacitors can provide additional current is that they have the ability to store electrical energy. When AC motor capacitors are connected to the AC power supply, they are charged first and then begin to discharge during the charging process. Since the current of AC motor capacitors reaches the peak before the power supply voltage, there is a certain phase difference between the current of AC motor capacitors and the power supply voltage. This phase difference is the key to achieving phase starting.
In the motor circuit, AC motor capacitors are connected in parallel with the starting winding. When the motor starts, AC motor capacitors begin to charge and generate a current that leads the power supply voltage. This current interacts with the magnetic field of the motor start winding to generate a rotational torque that starts the motor spinning. By adjusting the capacitance of the AC motor capacitors, we can change this phase difference and optimize the motor's starting performance.
The process of AC motor capacitors achieving phase starting is achieved through the interaction of the additional current provided by the AC motor capacitors with the magnetic field of the motor start winding. This process involves key factors such as the charging and discharging of the AC motor capacitors, the phase difference between the current and voltage, and the torque of the motor. By properly selecting and using AC motor capacitors, we can optimize the motor's starting performance and ensure that it can start and run smoothly and efficiently.
