Demonstration of the Production of 60 HZ AC Power Directly from High Frequency Alternators

摘要

This document presents the results of a project to demonstrate the production of 60 Hz AC power directly from high frequency alternators. A technique of modulating the output of existing truck and automotive style DC alternators was developed to produce low voltage single phase 60 Hz rectified output. The load was connected to this source by a commutation circuit that switched polarity of the load at the zero voltage crossing of each half cycle, exciting the load with a sinusoidal waveform. Existing low voltage DC alternators exhibited very high core losses in the 60 Hz modulation of the magnetic field, but calculations show that this could be significantly reduced by use of laminated electrical steel for the entire magnetic circuit. Calculations show that high frequency alternators could be designed to produce 120 VAC directly with low core losses, making this a practical method of generating 60 Hz AC power.