Comparative Analysis of Fixed Speed Variable Speed response of PFC Zeta Converter fed PMSM Drive using PI Controller

摘要

In several PWM DC-DC converter topologies, the controlling switches are operated in switch mode wherever they're needed to conduct the whole load current on and off throughout every switching cycle. Recently there is an enlarged interest within the use of resonant kind DC-DC converters due to the benefits of high efficiency, small size, lightweight, reduced Electro Magnetic Interference (EMI) and low component stresses. A novel PFC (Power factor Corrected) converter feeding a PMSM drive employing a single voltage sensing element is proposed for variable speed applications. It consists of single phase supply followed by uncontrolled bridge rectifier and a Zeta DC-DC converter is employed to regulate the voltage of a DC link capacitance that is lying between the Zeta converter and a VSI (Voltage source Inverter). The voltage of a dc-link capacitor of zeta converter is controlled to realize the speed control of PMSM Drive. The zeta converter is functioning as a front end device operating in DICM (Discontinuous inductor Current Mode) and therefore employing a voltage follower. Using MATLAB/Simulink 7.13 environment the model can be simulated to achieve a wide range of speed control.