Single Phase Motor Capacitor Calculator

This is a calculator for single phase motor capacitors.

With the support of this calculator, can determine –

• Capacitor value in microfarads for the single phase motor’s starting winding.
• Capacitor value in microfarads for the single phase motor’s running winding.

For calculating the starting capacitor value of a single phase motor

• Choose the most relevant option.
• Enter the wattage of the motor. If the available motor power is in horsepower, convert it to kW by multiply it by 746 watts.
• Enter the input voltage.
• Enter the value of the power factor (cosØ). If not sure, enter 0.8.
• The result would be displayed by the calculator.

Formula: C = (I x 10⁶) / 2 Π f V

Where,

I = Motor current in amperes.

F = Motor rated frequency

V = Motor rated voltage

For calculating the running capacitor value of a single phase motor

• Choose the most suitable option.
• Enter the wattage of the motor. If the available motor power is in horsepower, convert it to kW by multiply it by 746 watts.
• Enter the input voltage.
• Enter the rated frequency.
• Enter the single phase motor’s efficiency.
• The result would be displayed by the calculator.

Formula: C = [(P x η) / (V² x f)] x 1000

Where,

η = Motor efficiency

F = Motor rated frequency

V = Motor rated voltage

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