Three-phase squirrel cage motor single-phase operation connection circuit

The circuit connection method is shown in Figures a and b. Figure a is the connection method of the star winding parallel capacitor , and Figure b is the connection method of
the delta winding parallel capacitor . The capacity of the working capacitor cc in the figure
is calculated using the following formula: C= 19501UcosΦ. In the formula, C is the working capacitance (μF); I is the rated current (A); U is the single-phase rated voltage (v); cosΦ is the power factor.