Research on starting-up and pull-in performances of permanent magnet synchronous motors;

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.

In the end,traction characteristic equation has been derived,speed regulating characteristics of hydraulic drive system have been anal-yzed.

This paper presents the present condition and main technology data of foreign AC drive passenger locomotive,and the tractive characteristics of the introduce AC drive passenger locomotive are also introduced in this paper.

The pull-out characteristic of stepping motors can be determined by simulation method,but digital simulating can not present a explicit relation between the pull-out characteristic and motor variables.