dlgoff said:Just a note. It's probably not the case here, but I have seen motors where the start windings (and capacitor) get disconnected form the circuit once the armature speed is high enough. The motor has a centrifugal switch on one of its shaft ends.
After some google searching; looks like for a 230vac motor, the start caps are 16-22uF.
Regard
The starting capacitor rating for a single phase motor can be determined by multiplying the motor's rated voltage by its rated current and dividing that value by the motor's rated starting torque. This will give you the required capacitance in farads (F). Alternatively, you can consult the motor's manufacturer for the recommended capacitor rating.
A starting capacitor is used to provide an extra boost of power to a single phase motor during startup. This helps the motor overcome its initial inertia and reach its rated speed more quickly.
No, it is important to use a capacitor that is specifically designed for motor applications. These capacitors are built to withstand the high voltage and current demands of motor starting and have a higher tolerance for temperature fluctuations.
No, the starting capacitor rating is typically higher than the running capacitor rating for a single phase motor. This is because the starting capacitor only needs to provide a temporary boost, while the running capacitor needs to maintain a steady current throughout the motor's operation.
If the motor struggles to start or runs at a slower speed than usual, it may be a sign that the capacitor rating is incorrect. You can also use a multimeter to measure the current and voltage of the motor while it is running to ensure they are within the manufacturer's specifications.