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When you have a three-phase motor to connect to a single-phase mains, there are several solutions.
It is that of the capacitor assembly that will be discussed

Important:
Connecting a three-phase motor to mono with a capacitor drops its useful power. We lose on average 30% of useful power and 50% at start-up.

In the cutlery industry, this system will work well for machines that do not start under load, for example a grinder or a polisher. Do not use this assembly for engines that start under load or with high power such as a back stand or rammer.
All systems with capacitors remain DIY, which can work well, but the result is never guaranteed, you have to try and test.
A capacitor can be bought new (parts of household appliances) but can also be recovered from an old motor or a washing machine. Always check that it is a capacitor for 230V AC (therefore not polarized) and for continuous motor operation. Prefer capacitors with plastic packaging (called "self-healing") to those packaged in aluminum (old generation).
To reverse the direction of rotation of the motor, the 2 mains wires must be crossed.

Assembly:
To connect our 380v tri motor to 220v mono (phase + neutral), we will use the delta coupling.
We are going to connect for example: the phase in "u", the neutral in "v", and it will be necessary to add a capacitor between "v" and "w"

Very important !
The capacitor must have a voltage greater than 230v and must be AC ~, NEVER use a polarized capacitor or it will explode!
The usual value of the capacitor is expressed in microfarad "Âµf"

To find its value, simply multiply the power in CV by 50.

Example: a 250w motor (0.25kw)

- to start you have to convert the Watts into horsepower. for this we divide the watts by 736 (1 CV= 736 W)

In our example 250 / 736 = 0.34 HP, our motor is therefore 0.34 HP.

To find the value of the capacitor: 0.34 x 50 = 17, so to operate the 0.25kw motor you need a 17 Âµf capacitor.

If the value of the capacitor is less than 17 Âµf, the motor will work much less well, if at all.
If the value is greater than 17 Âµf it is not a problem at all.

When you have a three-phase motor to connect to a single-phase mains, there are several solutions.
It is that of the capacitor assembly that will be discussed

Important:
Connecting a three-phase motor to mono with a capacitor drops its useful power. We lose on average 30% of useful power and 50% at start-up.

In the cutlery industry, this system will work well for machines that do not start under load, for example a grinder or a polisher. Do not use this assembly for engines that start under load or with high power such as a back stand or rammer.
All systems with capacitors remain DIY, which can work well, but the result is never guaranteed, you have to try and test.
A capacitor can be bought new (parts of household appliances) but can also be recovered from an old motor or a washing machine. Always check that it is a capacitor for 230V AC (therefore not polarized) and for continuous motor operation. Prefer capacitors with plastic packaging (called "self-healing") to those packaged in aluminum (old generation).
To reverse the direction of rotation of the motor, the 2 mains wires must be crossed.

Assembly:
To connect our 380v tri motor to 220v mono (phase + neutral), we will use the delta coupling.
We are going to connect for example: the phase in "u", the neutral in "v", and it will be necessary to add a capacitor between "v" and "w"

Very important !
The capacitor must have a voltage greater than 230v and must be AC ~, NEVER use a polarized capacitor or it will explode!
The usual value of the capacitor is expressed in microfarad "Âµf"

To find its value, simply multiply the power in CV by 50.

Example: a 250w motor (0.25kw)

- to start you have to convert the Watts into horsepower. for this we divide the watts by 736 (1 CV= 736 W)

In our example 250 / 736 = 0.34 HP, our motor is therefore 0.34 HP.

To find the value of the capacitor: 0.34 x 50 = 17, so to operate the 0.25kw motor you need a 17 Âµf capacitor.

If the value of the capacitor is less than 17 Âµf, the motor will work much less well, if at all.
If the value is greater than 17 Âµf it is not a problem at all.

When you have a three-phase motor to connect to a single-phase mains, there are several solutions.
It is that of the capacitor assembly that will be discussed

Important:
Connecting a three-phase motor to mono with a capacitor drops its useful power. We lose on average 30% of useful power and 50% at start-up.

In the cutlery industry, this system will work well for machines that do not start under load, for example a grinder or a polisher. Do not use this assembly for engines that start under load or with high power such as a back stand or rammer.
All systems with capacitors remain DIY, which can work well, but the result is never guaranteed, you have to try and test.
A capacitor can be bought new (parts of household appliances) but can also be recovered from an old motor or a washing machine. Always check that it is a capacitor for 230V AC (therefore not polarized) and for continuous motor operation. Prefer capacitors with plastic packaging (called "self-healing") to those packaged in aluminum (old generation).
To reverse the direction of rotation of the motor, the 2 mains wires must be crossed.

Assembly:
To connect our 380v tri motor to 220v mono (phase + neutral), we will use the delta coupling.
We are going to connect for example: the phase in "u", the neutral in "v", and it will be necessary to add a capacitor between "v" and "w"

Very important !
The capacitor must have a voltage greater than 230v and must be AC ~, NEVER use a polarized capacitor or it will explode!
The usual value of the capacitor is expressed in microfarad "Âµf"

To find its value, simply multiply the power in CV by 50.

Example: a 250w motor (0.25kw)

- to start you have to convert the Watts into horsepower. for this we divide the watts by 736 (1 CV= 736 W)

In our example 250 / 736 = 0.34 HP, our motor is therefore 0.34 HP.

To find the value of the capacitor: 0.34 x 50 = 17, so to operate the 0.25kw motor you need a 17 Âµf capacitor.

If the value of the capacitor is less than 17 Âµf, the motor will work much less well, if at all.
If the value is greater than 17 Âµf it is not a problem at all.

When you have a three-phase motor to connect to a single-phase mains, there are several solutions.
It is that of the capacitor assembly that will be discussed

Important:
Connecting a three-phase motor to mono with a capacitor drops its useful power. We lose on average 30% of useful power and 50% at start-up.

In the cutlery industry, this system will work well for machines that do not start under load, for example a grinder or a polisher. Do not use this assembly for engines that start under load or with high power such as a back stand or rammer.
All systems with capacitors remain DIY, which can work well, but the result is never guaranteed, you have to try and test.
A capacitor can be bought new (parts of household appliances) but can also be recovered from an old motor or a washing machine. Always check that it is a capacitor for 230V AC (therefore not polarized) and for continuous motor operation. Prefer capacitors with plastic packaging (called "self-healing") to those packaged in aluminum (old generation).
To reverse the direction of rotation of the motor, the 2 mains wires must be crossed.

Assembly:
To connect our 380v tri motor to 220v mono (phase + neutral), we will use the delta coupling.
We are going to connect for example: the phase in "u", the neutral in "v", and it will be necessary to add a capacitor between "v" and "w"

Very important !
The capacitor must have a voltage greater than 230v and must be AC ~, NEVER use a polarized capacitor or it will explode!
The usual value of the capacitor is expressed in microfarad "Âµf"

To find its value, simply multiply the power in CV by 50.

Example: a 250w motor (0.25kw)

- to start you have to convert the Watts into horsepower. for this we divide the watts by 736 (1 CV= 736 W)

In our example 250 / 736 = 0.34 HP, our motor is therefore 0.34 HP.

To find the value of the capacitor: 0.34 x 50 = 17, so to operate the 0.25kw motor you need a 17 Âµf capacitor.

If the value of the capacitor is less than 17 Âµf, the motor will work much less well, if at all.
If the value is greater than 17 Âµf it is not a problem at all.