How much capacitor is used for 380V 40W motor to 220V

1. According to 2 4 micro-methods per 100w, about 12 15 micro-methods.

2. Three-phase motor refers to when the three-phase stator winding of the motor (each difference of 120 degrees of electric angle) is introduced into the three-phase alternating current, a rotating magnetic field will be generated, and the rotating magnetic field will cut the rotor winding, thereby generating induced current in the rotor winding ** The sub-winding is a closed path).

3. Single-phase motor generally refers to a low-power single-phase asynchronous motor powered by a single-phase AC power supply (AC220V). This type of motor usually has a two-phase winding on the stator, and the rotor is a normal squirrel cage type. The distribution of the two-phase windings on the stator and the power supply can produce different starting and running characteristics.

4. Capacitors, usually referred to as capacitors, are represented by the letter C. Definition 1: A capacitor, as the name suggests, is a 'container for electricity' and is a device that holds an electric charge.

Product Name: capacitor. Capacitors are one of the electronic components widely used in electronic devices, which are widely used in circuits in terms of DC blocking, coupling, bypass, filtering, tuning loop, energy conversion, control, etc.

Definition 2: A capacitor, any two conductors (including wires) that are insulated from each other and in close proximity to each other form a capacitor.

It is almost impossible to achieve the original power use through series capacitors, and the power must be reduced.

The 380-volt motor should be connected to two capacitors, one starting capacitor and one running capacitor. Because single-phase motors cannot self-start, a starting capacitor must be added. In the figure, C1 is the starting capacitor and C2 is the operating capacitor.

The capacitance of the capacitor is selected according to the power of the motor. The wiring diagram is as follows:

First of all, the wiring of the motor is changed to an adaptation voltage of 220 volts (for example, the original star connection is changed to a triangle connection), and how large the capacitor is equipped with is calculated according to the load current, and each current is selected about 3.5 micro-method.

See the figure below: Capacitance capacity watts * microfar.

Small motors with tens of watts and hundreds of watts can be used without starting capacitors.

Do not use such a method as much as possible, so that the use of three-phase motor will greatly reduce the motor power and starting torque, and now there is a single-phase inverter, which can output three-phase electricity and directly drive the three-phase motor, you may wish to refer to it.

The 380V three-phase asynchronous motor is changed to a two-phase 220V motor, which needs to be equipped with capacitors. The motor wiring changes are as follows:

1. Star connection.

2. Angular jointing.

3. Capacitance selection calculation:

The calculation formula of starting capacitance and running capacitance, the formula of running capacitance: c = 1950i ucos, c is the operating capacitance capacity (uf - micro method) i is the rated current value of the motor (a) u is the rated voltage, and the rated voltage is 220 volts. COS is the power factor, which is generally taken as the value, and the starting capacitance is generally 1-4 times that of the operating capacitance.

Three-phase AC 380 volt motor, change to three-phase AC 220 volt, no capacitor, power less than 3 kilowatt motor, star connection (380V), change triangle connection (220V).

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According to the motor power, about 4 micro-methods per 100W, 380V three-phase motors are generally 370W, so about 15 micro-methods. Any two phases are connected to the capacitor, and the other phase is connected to the capacitor at any time 220V, pay attention to adjusting the forward and reverse rotation of the motor. After the capacitance of 380V is changed to 220V, the output of the motor is reduced by about 1 4 to 1 3.

It is also possible to reconnect the original three-phase motor, and the modification method is as follows:

1. If the original motor wiring is a star connection, it can be changed to a triangulation method, and the corresponding capacitor phase shift (split phase) can be used.

2. It can also be used with capacitors without changing the original connection method, but the efficiency will be reduced.

3. In the case of power supply voltage 220V, the capacitance can be selected according to 20 30 micromethod kW, and it is best to choose oil-immersed non-polar capacitors with a withstand voltage of more than 630V.

4. Wiring method, the three wires on the motor are connected to the live wire and the neutral wire respectively, and the remaining one wire can be connected to the live wire or the neutral line after connecting the capacitor in series and turning according to the need.

5. If it cannot be started normally, a 200 300 microfaract 220-400V starting capacitor can be connected in parallel on the working capacitor, and a starting button must be connected in series on the starting capacitor for starting.

A 380 volt motor cannot be used with 220 volts, unless the motor has a 220 volt tap.

Summary. Dear, hello, immediately solve the problem for you, 380V motor to 220V motor needs to use 35 micro-method 450 volt running capacitor, the motor is mainly composed of stator and rotor, capacitor is a device that accommodates the charge, the capacitance is displayed by the direct standard method, and the capacitor has the functions of coupling, decoupling, high-frequency vibration cancellation, resonance, bypass and so on. Precautions for the use of household appliances:

1. When installing the air conditioner, try to get as close as possible to the power socket for easy connection and use. 2. Household appliances cannot be started, it may be that the socket is damaged, you can try to replace the socket to turn on; It may be a hardware failure of the device, it is recommended to contact the after-sales service.

How to change 380V motor to 220V? How big capacitor to match.

Dear, hello, Ma Kuxian will solve the problem for you, 380V motor to 220V motor needs to use 35 micro-method 450 volt operating capacitor, the motor is mainly composed of stator and rotor, capacitor is a device that accommodates the charge, the capacitance is displayed by the direct standard method, and the electric stool capacity has the functions of coupling, decoupling, high-frequency vibration cancellation, resonance, and bypass. Precautions for the use of household appliances: 1. When installing the air conditioner, try to be as close as possible to the power socket to facilitate connection and use.

2. The household appliance cannot be started, it may be that the socket is damaged, you can try to replace the socket to turn it on; It may be a hardware failure of the device, it is recommended to contact the after-sales service.

3. When installing air conditioners, TVs and other equipment, keep a certain distance from the wall, so as not to affect the heat dissipation of the equipment and affect the user experience. 4. When using electrical appliances, do not switch on and off electrical appliances frequently, which may reduce the service life of the equipment. 5. The power supply voltage of air conditioners, TVs and other equipment can fluctuate too much, and it is best not to share sockets with other household appliances, which may lead to short circuits.

Data expansion: Household air destroyers are divided into frequency conversion and fixed speed. The ability of the air conditioner to regulate the indoor air temperature with the same number of horses, the inverter air conditioner is greater than the fixed speed air conditioner.

Inverter air conditioners are relatively cost-effective and more energy-efficient to use. In addition, the inverter air conditioner can achieve accurate temperature control and prevent "air conditioning disease" in a certain procedure.

Summary. Hello, the capacitor capacity required to change the 380V motor to 220V is equal to the power, and the capacitor capacity required for 3 kW is 3000*. The formula for calculating the starting capacitor and the running capacitance, the formula for the running capacitance:

c = 1950i ucos, c is the operating capacitance uf - micromethod i is the rated current value of the motor (a) u is the rated voltage, the rated voltage is 220 volts. COS is the power factor, take the value, the starting capacitance is generally 1-4 times the operating capacitance.

Hello, the capacitor capacity required for 380V motor to change to 220V is equal to the power, and the capacitance capacity required for 3 kW is 3000*. The calculation formula of starting capacitance and running capacitance, the formula of operating capacitance: Sell C = 1950i UCOS, C is the operating capacitance UF-Micro I is the rated current value of the motor (A) U is the hand-buried rated voltage, and the rated voltage is 220 volts.

COS is the power factor, take the value, the starting capacitance is generally 1-4 times the operating capacitance.

Three-phase 380 volt motor to single-phase 220 volt, need to change the motor to triangulation method, can only be equipped with one operating capacitor, the capacity is 35 micro-method 450 volts (or 40 micro-method). Starting capacitor: AC electrolytic capacitor or polypropylene, polyester capacitor used to start a single-phase asynchronous motor.

Calculation formula The calculation formula of the operating capacitance of a single-phase motor: c=1950i ucos (microfar) In the formula: i:

Motor current, u: power supply voltage; cos: power factor, taken, 1950:

Constant Starting capacitance is generally calculated as 1-4 times the operating capacitance capacity.

How to calculate the 380V motor to replace the 220V capacitor.

Three-phase 380 volt motor to single-phase 220 volt, need to change the motor to triangulation method, can only be equipped with one operating capacitor, the capacity is 35 micro-method 450 volts (or 40 micro-method). Starting capacitor: AC electrolytic capacitor or polypropylene, polyester capacitor used to start a single-phase asynchronous motor.

Calculation formula The calculation formula of the operating capacitance of a single-phase motor: c=1950i ucos (microfar) In the formula: i:

Motor current, u: power supply voltage; cos: power factor, taken, 1950:

Constant Starting capacitance is generally calculated as 1-4 times the operating capacitance capacity.

The 380 motor capacitor you said you want to start or work capacitor, if the starting capacitor can be connected to the 220 directly on the three-phase pile head, in addition to the capacitor a wire is connected to the remaining pile head, one by one to connect the 220 to the two pile heads that come in, after the start is completed, the starting capacitor must be unplugged from the capacitor. If it's work, you don't have to. The size of the capacitance depends on the work of the motor.

Hope it helps.