Series resonant DC link dual converter as a DC motor drive

This paper presents the methods of DC motor drive control. The performances of those methods (phase control method, resonant full and dual bridge methods) are investigated and compared through digital simulation. A series resonant DC link dual power converter for a DC motor drive is proposed to obtain smooth ripple current and fast response utilizing high frequency resonance. The proposed system generates resonant current pulses, switching is done at zero current instants, and so switching losses are reduced to a minimal value. In this system, the motor current can be operated in both the forward and reverse direction and also in the zero current region in which the previous single type converter was hard to work. The improvement of input power factor and elimination of higher harmonics content can be achieved dramatically by this implemented input converter control