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A load commutated inverter-fed induction motor drive with a novel DC-side commutation circuit

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3 Author(s)
Hyung-Soo Mok ; Dept. of Electr. Eng., Seoul Nat. Univ., South Korea ; Seung-Ki Sul ; Park, M.-H.

A load commutated current source inverter (LCCSI) induction motor drive system employing a novel DC-side forced commutation circuit for machine startup is proposed. To avoid the adverse effects of the induction motor, a solution is proposed, i.e., using a special kind of one-notch current pulse width modulation (PWM) fully utilizing the proposed commutation circuit. Along with compensating the capacitive current, the direct vector control referred to the rotor flux fixed reference frame without speed sensor is used to decouple torque and flux generation currents and to overcome the problem of instability caused by the output capacitor. The availability of the proposed circuit for a high-power drive system is verified by computer simulation for a 600 hp induction motor

Published in:

Industry Applications Society Annual Meeting, 1992., Conference Record of the 1992 IEEE

Date of Conference:

4-9 Oct 1992