What is the difference between start up capacitor and operating capacitor?

The capacity of the starting capacitor is large, generally 2-5 times that of the operating capacitor, and the capacity of the operating capacitor is small, and the difference between the two capacitances is huge, and it is easy to distinguish.

The running capacitor is to turn the alternating current.

After phase shifting, an alternating magnetic field is formed by the secondary winding, and an elliptical rotating magnetic field is formed with the alternating magnetic field of the main winding.

So he can be the same capacitor, but its role is different; The starting capacitor is to make a single motor.

The starting coil is energized at the time of starting, cut off after starting, and the running capacitor is to let the motor play a capacitance compensation in operation, so the starting capacitance can not be less, and the running capacitor can not be used.

Operating capacitance: It is to transfer the alternating current phase to the secondary winding to form an alternating magnetic field, and form an approximately circular elliptical rotating magnetic field with the alternating magnetic field of the main winding. So he can be the same capacitor, but its role is different;

Starting capacitor: It is to make the starting coil of a single motor energized at the time of starting, and cut off after starting, and the running capacitor is to let the motor play a capacitance compensation in operation, so the starting capacitance can not be less, and the running capacitor can be dispensed without.

The difference between starting capacitance and running capacitor is two:

Starting capacitor: It is to make the starting coil of a single motor energized at the time of starting, and cut off after starting, and the running capacitor is to let the motor play a capacitance compensation in operation, so the starting capacitance can not be less, and the running capacitor can be dispensed without.

No matter what kind of capacitor it is, it has a starting effect at the beginning of the motor. However, when the motor reaches about 75 [%] of the rated speed, the starting capacitor is automatically disconnected by the centrifugal switch, and the running capacitor continues to work with the motor. The process of starting the motor is actually the process of "column phase".

Because single-phase motors are different from three-phase motors, there is no phase difference, and no rotating magnetic field can be generated. The function of capacitance is to make the starting winding current of the motor in time and space, ahead of the running winding 90 electrical angles, forming a phase difference. Among them, the operating capacitor also plays a role in balancing the current between the main and auxiliary windings.

The starting capacitor is required to work for a short time in an instant, and the withstand voltage is required to be above 250V, while the operating capacitor needs to work for a long time and the withstand voltage is required to be above 400V.

1.The state is different, after the motor of the starting capacitor is started, it is disconnected by the separation switch, while the motor of the running capacitor is involved in the operation with the starting coil after it is started.

2.The capacitance is different, the capacity of the starting capacitor is about 200 microfarads, and the capacity of the operating capacitor is about 20-30 microfarads.

3.The role is different, the starting capacitor is to make the starting coil of a single motor energized at starting, and cut off after starting, and the running capacitor is to make the motor play a capacitance compensation in operation, the starting capacitor can not be less, and the running capacitor can be dispensed without.

Starting capacitor: It is to make the starting coil of a single motor energized at the time of starting, and cut off after starting, and the running capacitor is to let the motor play a capacitance compensation in operation, so the starting capacitance can not be less, and the running capacitor can be dispensed without.

Generally, the starting capacitor capacity is large, and the operating capacitor capacity is small, and the starting capacitor is disconnected after the motor works normally when the motor is started and running, and the running capacitor works normally.

This is how the single-phase three forms of electric motors start and run. The first type of start-up is single-capacitor starting, which uses a larger capacitor (e.g., 450V200 F) stringed into the starter coil. After the motor is started, during normal operation, the starting winding and starting capacitor are disconnected by the centrifugal switch, and the main winding is operated.

The second is a one-way double-capacitor motor, this kind of motor is connected to the starting capacitor at the position of the starting winding, and then a smaller running capacitor in the string, (about 30 micro-method 450V), after the motor starts, when running, the centrifugal switch only disconnects the larger starting capacitor, and does not open the running capacitor and the starting winding, so that the running capacitor and the starting winding participate in the operation, which is equivalent to adding a small power motor to run.

The third is a unidirectional single-capacitor running motor, and the capacitance of this motor is both a phase-shifting starting capacitor and a running capacitor. Without a centrifugal switch, this type of motor generally has less power, about 350W or less. The selection of the capacitance capacity of this motor should be selected according to the power of the motor, that is, it can not be too large or too small, the starting torque is too small, the motor power is reduced, and the capacity is too large, although the starting torque increases, the corresponding starting winding current also increases, the running time is too long, and it is easy to burn the starting winding.

Electrician Knowledge: What is a Starting Capacitor? What is a running capacitor? It turns out that the difference is so big.

Electrician Knowledge: What is a Starting Capacitor? What is a running capacitor? It turns out that the difference is so big.

Summary. Hello, glad to answer for you. After the motor of the starting capacitor is started, it is disconnected by the separation switch, and after the motor of the running capacitor is started, it is involved in the operation with the starting coil.

Hello, glad to answer for you. After the motor of the starting capacitor is started, it is disconnected by the separation switch, and after the motor of the running mold destroyer is started, it is involved in the operation with the starting coil.

The capacitance is different, the capacity of the starting capacitor is about 200 microfarads, and the capacity of the operating capacitor is about 20-30 microfarads. 3.The function is different Qi orange smile dynamic capacitor is to make the starting coil of a single blind motor energized at start, cut off after starting, and the running capacitance is Yuanshenhan to let the motor play a capacitance compensation in operation, and the starting capacitance can not be less.

1. The state is different.

Starting capacitor: After the motor starts, the starting capacitor is disconnected by the separation switch.

Running capacitance: After the motor is started, the running capacitor is involved in the operation with the starting wire branch ring.

2. The capacity is different.

Starting capacitance: about 200 microfarads.

Operating capacitance: about 20-30 microfars.

3. The role is different.

Starting capacitor: The starting capacitor is to make the starting coil of a single motor energized at start-up and cut off after starting.

Operating capacitance: Let the motor play a capacitance compensation in operation, the starting capacitance can not be less, and the operating capacitance can be dispensed without.

1. The state of the motor is different after starting.

After the motor is started, the starting capacitor is disconnected by the separation switch, and the running capacitor is involved in the operation with the starting coil.

2. The capacity is different.

The starting capacitance capacity is about 200 microfarads, and the operating capacitance capacity is about 20-30 microfarads.

3. The role is different.

The starting capacitor is to make the starting coil of the single motor energized at the time of starting, and cut off after starting, and the rotten bridge running capacitor is to make the motor play a capacitance compensation in operation.

The role of the starting capacitor is to start the AC electrolytic capacitor or polypropylene and polyester capacitor of the single-phase asynchronous motor.

1. To make the single-phase motor rotate automatically, a starting winding can be added to the stator, the starting winding and the main winding are 90 degrees different in space, and the starting winding should be connected in series with a suitable capacitor, so that the current with the main winding is approximately 90 degrees different in phase, that is, the so-called phase splitting principle.

2. In this way, two current bonds with a difference of 90 degrees in time are passed into two windings that are 90 degrees apart in space, and a (two-phase) rotating magnetic field will be generated in space. Under the action of this rotating magnetic field, the rotor can start automatically, after starting, when the speed rises to a certain level, the starting winding is disconnected with the help of a centrifugal switch or other automatic control device installed on the rotor, and only the main winding works normally.

3. Therefore, the starting winding can be made into a short-term working mode. But there are many times, the starting winding and constantly draft the brother open, calling this motor a capacitive single-phase motor, to change the steering of this motor, can be achieved by changing the position of the capacitor in series.