Induction Motor Drive Using a Resonant DC Link Inverter

摘要

New initiatives to increase the use of electrical power, such as the electricvehicle and the More Electric Airplane, have created a need for improved motor drives. The use of adjustable speed drives has recently received more attention in these applications because new circuit topologies and power components have been developed that have enabled improvements in efficiency, power density and response times. This study reports the design and simulation of an actively clamped resonant dc link inverter that will drive an induction motor based blower. The objective of this study is to design, build and test a resonant dc link (RDCL) inverter and compare the performance of a six-step control strategy with a pulse density modulation strategy in an adjustable speed drive. Comparisons are made between a hard switched pulse width modulation converter and an RDCL inverter. Theoretical and experimental power loss calculations of the RDCL inverter are compared and discussed. The performance of constant voltage/frequency adjustable speed control is presented.