Title :
A load commutated inverter-fed induction motor drive with a novel DC-side commutation circuit
Author :
Mok, Hyung-Soo ; Sul, Seung-Ki ; Park, Min-Ho
Author_Institution :
Dept. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
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
Keywords :
commutation; electric drives; induction motors; invertors; load (electric); machine control; magnetic flux; pulse width modulation; rotors; starting; velocity control; 600 hp; CSI; LCI; PWM; availability; commutation circuit; computer simulation; direct vector control; induction motor drive; instability; load commutated current source inverter; machine control; one-notch current pulse width modulation; reliability; rotor flux; starting; velocity control; Capacitive sensors; Commutation; Induction motor drives; Induction motors; Machine vector control; Pulse circuits; Pulse width modulation; Pulse width modulation inverters; Rotors; Space vector pulse width modulation;
Conference_Titel :
Industry Applications Society Annual Meeting, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-0635-X
DOI :
10.1109/IAS.1992.244337
