New GTO Current Source Inverter with Pulsewidth Modulation Control Techniques
- 1 July 1986
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industry Applications
- Vol. IA-22 (4), 666-672
- https://doi.org/10.1109/TIA.1986.4504776
Abstract
A new GTO current source inverter in which two auxiliary GTO's are added to the basic inverter circuit, which consists of six GTO's and three capacitors, is presented. One of the auxiliary GTO's is connected between the positive line of the inverter and the neutral of three Y-connected capacitors; another is connected between the negative line and the neutral. In the proposed inverter, the charges of three capacitors are controlled at the same time by means of pulsewidth modulation (PWM) to main GTO's and auxiliary GTO's. This inverter can supply both the sinusoidal current and voltage to the motor. The PWM control technique, the operating principle, and the experimental results for 2.2-kW induction motor drives are described. The output current waveform of this inverter is closely sinusoidal, as opposed to trapezoidal in the basic inverter circuit. The steady-state characteristics of the GTO-CSI induction motor drive system are analyzed by the state-variable methods, and a close agreement between the analyzed and the experimental results is obtained. Smooth and noiseless drive of induction motor over a wide range of speed is observed.Keywords
This publication has 3 references indexed in Scilit:
- A New Current Source GTO Inverter with Sinusoidal Output Voltage and CurrentIEEE Transactions on Industry Applications, 1985
- Current source inverter with commutation control by gto thyristorsElectrical Engineering in Japan, 1984
- Beat phenomena of a current source inverter‐induction motor drive systemElectrical Engineering in Japan, 1982