Core loss testing-essential for the 1990s

The author points out why minimizing core losses is important to users of rewound motors. It is indicated that core testing is important because it leads to better customer service and can reduce a repair shop´s warranty costs. Core permeability describes the relative ability of the motor core to support a strong magnetic field. Any reduction in core permeability means that more power will be required to produce the original magnetic field strength. This will cause the motor to draw higher no-load current, while negatively effecting both efficiency and power factor. The author seeks to create an awareness of the two most common core testing techniques and motivate the reader to learn more about more core testing