A figure easily understand the principle of motor startup capacitor

As electrician, must know the difference between three-phase ac motor and single phase ac motor, a little bit advertent, single-phase ac motor a equipment more than three phase ac motor and it is start capacitance, the most common is all kinds of household appliances, household appliances startup capacitor motor almost necessary.

in the first place, the principle of simple look at startup capacitor, from a professional point of view, perhaps some bad understanding, if we want to check the professional information on this. My personal understanding, start the capacitance is a thrust, in motor starts to let electric function from moving to turn up, without him, single-phase ac motor at startup, the origin of jitter rather than turning, two-phase ac motor starting capacitor is throughout the &; Advance Angle & throughout; , without him, will not be able to power on the rotor magnetic field, rotating, of course, is impossible, in this way is easy to understand. About start capacitance in the internal structure and principle of single-phase ac motor, generally can be divided into two winding up and running, start winding is generally referred to as the auxiliary winding, winding is called the primary winding operation, as shown in figure:

understand the content of the above, in case of some & throughout; Buzz throughout the &; But don't turn the two phase alternating current machine, also will naturally think of check damaged startup capacitor.

but the points of the size of the startup capacitor, is not literally a capacitor can make motor running, too big, motor running too fast, get hot, long running easily burn out motor; Rotor is too small, and can't give enough force, the thrust is too weak, the motor cannot be started, so replacing start capacitance, some do not change the original capacity size.

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