One, single-phase capacitor motor failure

Solution:

1, first check the mechanical parts

2, check the capacitance, the reason is that the capacitance capacity becomes small

3, check the winding. Not very good check. Can be disassembled, check the winding is not burned paste and other phenomena

Two, the series excitation motor failure:

1, check the variable speed mechanism

2, check the stator and rotor is swept

3, check the stator and rotor whether there is a short-circuit, minor short-circuit is not good to find out, you can try to change the parts