The distribution of magnetic flux in a typical DC linear motor is analysed based on the theory of inner magnetic field network partition, and a new small permanent-magnet DC linear motor is designed and calculated according to the field analysis theory.

By use of such theories as wasting transmission line, microwave equivalent circuits, network matrix of electromagnetism and so on, this paper analyses the excessive modes cylindrical cavity pulse compress system, and gains the theoretic calculate formula of power gain、energy storage efficiency, which has perfectly direct effect on the design, manufacture, and debugging.

The syncrectifi-cation,magnetic reset and demagnetization network are analyzed in the paper.

This paper presented magnetic network model by combining magnetic field with magnetic circuit.

The magnetic circuit of the motor is analyzed using the gap specific permeance method and the equivalent magnetic network equations are formulated with due consideration of the saturation efect in the teeth.