The motor model including iron loss under synchronous coordination is established and variable motor loss function is deduced in the paper,the iron loss resistance is paralleled with primary magnetizing branch instead of mutual magnetizing branch to include the primary leakage inductance influence on the motor loss.

This paper introduces the principle of leakage protection unit of mine vacuum feed switch in detail,emphatically analyzes the testing process of higher-level leakage protection of feed loop.

Design of accelerator s primary power supply in DNB for EAST diagnosis is described in this paper.