Why is the capacitance of a single-phase motor adjustable speed?
That is the compensation capacitor, which is irrelevant to the speed regulation, and is used to increase the power factor. Otherwise, the motor will be very expensive
Perhaps some friends have not seen capacitor speed motor, my family's ceiling fan is capacitor speed regulation, CBB capacitor 10 micro method, five tap, four gear speed regulation.
Compared with the inductance governor, the capacitor governor has the advantages of small size, easy installation and long service life, especially if it does not consume power. In addition, the use of capacitor speed regulation can also improve the power factor of the grid. Therefore, the use of capacitive speed of small single-phase motor is also more common.
AC current through the capacitor, but will be hindered, the capacitance is smaller, the greater the barriers, the greater the capacitance block is small, this is the capacitance, capacitance motor is several capacitors and the motor windings are connected in series, current resistance to adjust the motor using the capacitance, so as to realize the motor speed.
