In general condition,it should be allowed that eccentric error is larger than ±10% of average air-gap,but over-large eccentric value can produce very much unbalanced magnetic pull,and then increase the deflection of motor shaft,thus critical speed is influenced.

A study of characteristics of gas gap heat switch and pressure adjustment;

Finds out the Gap index that is used to judge the gas gap between the cooling wall and the carbon brick through the theory analysis and experimental research,calculates the value of Gap and confirms it reliable.

Study on a new magnetolastic torque sensor with resistablity to air-gap variation;

Analysis of variation in air-gap between rotor and stator in high-speed motorized spindle;

In order to optimumly select the third harmonic winding of harmonic exciting generator, the paper anlayses and calculates the air-gap magnetic field distribution of 12 kW and 50 kW harmonic exciting salient-pole synchronous gererator under no-load and full-load conditions by the finite-element method.

Study on the mechanism of air gap between H-type casts and mould;

Study of air gap formation during the mold casting Pb;

New study on the principle of air gapped core current transformer;