Systematic Reviews in Health Care

An output voltage wave having a desired amplitude and frequency is formed from selected portions of the AC signal generated by an induction generator. The selected portions of the generated signal are chosen in such a fashion as to establish the phase angle of the current drawn from the induction generator at a value that results in an appropriate excitation current being provided for the induction generator. Control arrangements are utilized to determine the required phase angle for the current drawn from the induction generator and to determine the portions of the generated signal that must be utilized to provide such a phase angle. Establishing the phase angle of the current drawn from the induction generator is accomplished without affecting the phase angle of the output current, which is determined by the load.