The performance characteristics of the electric devices for starting motor, ignition system, automatic protector and power supply generator are described respectively.

The effect of nonlinear load and the filtering action of motor-generator is analyzed, and an effective analytic tools and test reference for ship medium frequency power system is supplied.

The processing problem related to the rotor and axis of the heavy generator or motor, which are used in electric power system, is always the most important point in motor manufacturing.