Motor Starting Capacitors

Starting capacitors

Capacitors

Capacitors are electrical components that are the basis of any electrical circuit. They are two electrically charged conductors separated by a dielectric such as paper, plastic, glass, air, or other material that is a weak conductor. A field is created between the two wires in which electrical energy can be stored. This conserved electrical energy can be used in compensating for dips in the electromagnetic field. The capacity of the stored electrical energy is measured with the unit farad.

Start capacitors

Starting capacitors are designed for starting AC asynchronous motors, each starting capacitor has two essential roles to reduce sparks between contacts and the rapid rise of the magnetic field. They can vary the magnitude of the current for one or more revolutions of the electric motor in order to create a rotating magnetic field to compensate for the dips in the rotation of the rotor. The start capacitor slightly increases the starting torque of the electric motor and remains in the circuit until the rotational speed suddenly increases to 3/4 of the maximum, after which it turns off.