Performance of inverter with electrical double layer capacitor for vector controlled induction motor drives

This paper proposes a direct current (DC) power supply circuit consisted of a battery and an electrical double layer capacitor (EDLC). An inverter-fed induction motor (IM) drive is controlled using the proposed power supply circuit. This power supply circuit can is a power regeneration system consisting of a battery connected to an EDLC through a step-up and down chopper. By switching control of the step-up and down chopper, the chopper can control charge and discharge of the EDLC. Therefore, the EDLC enables us to DC energy with the chopper. When the inverter-fed IM drive generates a power with regenerative braking, the power energy is charged to the EDLC. The EDLC discharges the energy power when the IM is accelerated or load is added to the IM. By controlling the energy of the EDLC suitably, the proposed power supply circuit can reduce the load of battery. The utility of the proposed method is examined through computer simulations and experimental results.