jb High Quality Motor Capacitors
★ Motor Capacitors
AC induction motors, also known as asynchronous motors, use a rotating magnetic field to produce torque.
Three-phase motors are widely used because they are reliable and economical.
The rotating magnetic field is easily achieved in three-phase asynchronous motors because the phase angle offset between the individual phases is 120 degrees.
However, single-phase AC motors require external circuitry which creates the phase angle offset in order to produce a rotating magnetic field.
This circuitry can be realized using advanced power electronics, or more simply using a motor capacitor.
★ Widely Applications
Motor start and run capacitors are used in single-phase AC induction motors.
Such motors are used whenever a single-phase power supply is more practical than a three-phase power supply, such as in domestic appliances.
They are not as efficient as three-phase AC induction motors, however.
In fact, single-phase AC motors are 2 to 4 times less efficient than three-phase AC motors, which is why they are used only for less powerful motors.
Typical applications which utilize start and run motor capacitors include power tools, washing machines, tumble dryers, dishwashers, vacuum cleaners, air conditioners and compressors.
From jb Capacitors Company
