Title :
A PI-type dead-time compensation method for vector-controlled GTO inverters
Author :
Jung, Jinhwan ; Nam, Kwanghee
Author_Institution :
Dept. of Electr. Eng., POSTECH Univ., Pohang, South Korea
Abstract :
In the case of voltage-source gate-turn-off thyristor (GTO) inverters, the conventional dead-time compensation methods do not work well, since the terminal voltage of an inverter leg is not constant during the dead-time period, due to the presence of the snubber circuit. We propose a closed-loop dead-time compensation method that regulates the voltage error by a proportional-integral (PI)-type compensator. We show its superior performance by the reduction in current ripple and in the sixth harmonic component of the motor current in the synchronous frame
Keywords :
harmonics; invertors; snubbers; thyristor convertors; two-term control; voltage control; PI-type dead-time compensation method; current ripple reduction; inverter leg terminal voltage; motor current; proportional-integral compensator; sixth harmonic component; snubber circuit; synchronous frame; vector-controlled GTO inverters; voltage error regulation; voltage-source gate-turn-off thyristor inverter; Circuits; Error correction; Industry Applications Society; Insulated gate bipolar transistors; Inverters; Sensorless control; Snubbers; Switches; Thyristors; Voltage control;
Journal_Title :
Industry Applications, IEEE Transactions on
