Three phase asynchronous motor we can make by commutation120°The phase difference is reversed, then what are the requirements of single-phase asynchronous motor inversion? The following Senli motor Xiaobian will explain briefly for you.

       We need to know that the reason why the single-phase asynchronous motor will start is that the capacitor of the appropriate capacity is connected in series after the start winding to make the phase difference between the two windings90°, resulting in magnetic field rotation; Therefore, we only need to switch the power line with the capacitor, so that the opposite magnetic field will be generated, so that it is reversed.

       Then is not allSingle-phase asynchronous motorCan they turn back and forth? This is not necessarily, there are many motors can not achieve positive and negative rotation, like our common submersible pump motor, although there is capacitance, but because of the particularity, in use will be a transformation of the motor, increase the bearing, reverse sleeve and so on.

       Single-phase asynchronous motors have primary and secondary windings, we need to use a multimeter to measure, the smaller resistance is the starting winding, we are also called the main winding, the larger resistance is the running winding, we are called the secondary winding.

       When starting a single-phase asynchronous motor, the starting capacitor is connected in parallel to the primary and secondary windings, one of the capacitors is connected to the power firewire, and the common end is connected to the power neutral wire. If the rotation direction is marked as positive, then when the firewire is connected to the other capacitor, it is reversed.

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