The issues are pointed out those arose resinsand technology applied in the production in bitch of casts used in high-voltage Ex motors,such as the quality control of casting,control of the temperatures and design of fixtures.

A signal collection system,adopted with DSP(Digital Signal Processing),effectively performs the signal processing and collecting in real time,considering the case of Ex motor set.

The lifting tool is placed a very important role when a core is inserted into the frame during assembly of Ex motor.

Study on on-line diagnostic method for rotor faults of high voltage explosion-proof motor based on evidence theory;

In order to improve the integral stability of the High voltage explosion-proof motor and decrease temperature rise and the deformation of the spigot flameproof joints, it is adopted the new material for the casting iron on the frame of the motor, thus, the explosion protection security has been improved.

In this paper introduces the classification of petrochemica dangerous places and the pattern of explosion-proof motor and the basis for the choice of explosion-proof motor.

By making example of QCL03 bunker-cleaner,this paper proposes the qualitative analysis methods on the pulling performance of full hydraulic-driving vehicles whose power installation is explosion-proof electric motor and gains the practical performance curves of the real electric motor,then makes substitution of the formulas to make a quantitative analysis on the pulling performance.

By making example of the double drive loader,this paper proposes the qualitative analysis methods on the pulling performance of full hydraulic-driving vehicles whose explosion-proof electric motor and diesel engine, at gaining the actual performance curve of the electric motor or diesel engine, then makes substitution of the formulas to make a quantitative analysis on the pulling performance.