I always thought that capacitor or inductor circuits invariably contain a voltage thats 90 degrees phase shifted off the ccurrent, however yesterday I was reading some material and I came across something that states that capacitors or inductors can phase shift the voltage by 45 degrees by altering to the capacitance or inductance appropriately.here is what I read:On starting, the switch is closed, placing the capacitor in series with the auxiliary winding. The capacitor is of such a value that the auxiliary winding is effectively a resistive-capacitive circuit in which the current leads the line voltage by approximately 45°. The main winding has enough inductance to cause the current to lag the line voltage by approximately 45°. The two currents are therefore 90° out of phase, and so are the magnetic fields which they generate. The effect is that the two windings act like a two-phase stator and produce the revolving field required to start the motor.Can someone account for this?Thanks in advance
The circuit could give a 45? phase shift since it contains capacitance, inductance and resistance (from the windings). A vector diagram for this arrangement would show: VR horizontal VL vertical (up) VC vertical (down) The resultant could be any angle between 0 and 90?, depending on the values of VR, VL and VC.
