Based on the analysis of operation characteristics of the unwind motor, we proved that the calculation of the motor’s maximum current is the key for selecting the motor rated power.

Single-phase parallel hybrid active power filter adopting novel control approach of load current detection;

The principium of hot rolling bar shear controlled by T400,and the effect of speed set-point characteristic to load current are analyzed.

The analysis and Matlab simulation results show that the proposed controller greatly improves the dy- namic behavior of buck converter caused by fast variation of input voltage and/or load current,features clear physical meaning and easy design.

Based on the theoretical analysis of each factor inducing vibration of core and winding, the experiments validated that the fundamental frequency magnitudes of core and winding vibrations are linear to square of no-load voltage and loading current respectively.

With the drive of synchrotron ring magnets as the main target, a new scheme is proposed for producting pulsed large currents with flat top and bottom in a large inductance loading.