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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How much Capacitor for 1 HP motor?
For a single-phase motor with a horsepower rating of 1 HP, the typical value of the start capacitor ranges from 50 to 100 microfarads (μF). Typically, the run capacitor, which is the component that stays in the circuit during the operation, has a value of 25-36 MFD.
Because the design & application of the motor can have an effect on specific requirements, it is important to typically refer to the datasheet (or) the instructions provided by the manufacturer.