Soft-switching Inverter-fed Single-phase Collector Motor Drive

This paper deals with the performance analysis of a hand power tool (HPT). The HPT is being driven by a single-phase collector motor drive fed by a PWM voltage source soft-switching inverter. A mathematical model of an electro-mechanic system of a HPT has been worked out. The dynamic model of an electric motor consists of a system of non-linear differential equations that include the resistance and dynamic inductance of an armature and field winding and spinning E.M.F. The proposed drive system is modeled and its performance is simulated in Matlab/Simulink. The simulation results show that a smaller switching loss and higher conversion efficiency are obtained by the proposed soft-switching inverter. The performance of the drive is improved by using voltage regulator when compared with direct connection to the voltage source.