SOLUTION

In a single-phase, resistance split-phase motor, the phase difference between the currents in the auxiliary winding and the main winding is approximately 30 degrees.

Detailed Explanation

• In resistance split-phase motor the main winding has very low resistance and a high inductive reactance whereas the starting winding has high resistance and low inductive reactance.
• Since the start winding has low inductance and high resistance, the current flow through it will slightly lag the line voltage.
• Also, the run winding is more inductive, the current flow through it will appreciably lag the applied voltage, as in any inductive circuit.
• The resultant two out-of-phase currents resemble a two-phase power source.
• With lower inductance and higher resistance, the current will experience less phase shift than the main winding. About 30^o of phase difference may be obtained.