Title :
Harmonic reduction of CO2 welding machine using single-switch, three phase boost converter with sixth order harmonic injected PWM
Author :
Lee, Jung-Ho ; Kim, Jun-Ho ; Kim, Soo-Seok ; Won, Chung-Yuen ; Kim, Young-Seok ; Choi, Se-Wan
Author_Institution :
Sch. of Electr. & Comput. Eng., Sung Kyun Kwan Univ., South Korea
Abstract :
In this paper, sixth order harmonic injected PWM for improving input current distortion of single switch three phase boost converter is presented. A periodic sixth order harmonic voltage is injected in the control circuit to vary the duty ratio of the converter switch within one switching cycle. As a result, the input phase currents are forced to track the input voltage and almost unity power factor is obtained. Experimental results are verified by a converter operating at 400 V/6 KW with three phase 140 V-220 V input and by a CO2 arc welding machine which was nonlinear load with 3φ 220 V input
Keywords :
AC-DC power convertors; PWM power convertors; arc welding; harmonic distortion; power conversion harmonics; power factor correction; rectifying circuits; switching circuits; 140 to 220 V; 400 V; 6 kW; CO2; CO2 arc welding machine; convertor switch duty ratio; harmonic reduction; input phase currents; input voltage tracking; single-switch three-phase boost converter; sixth-order harmonic-injected PWM; switching cycle; unity power factor; Harmonic distortion; Phase distortion; Pulse width modulation; Pulse width modulation converters; Reactive power; Switches; Switching circuits; Switching converters; Voltage control; Welding;
Conference_Titel :
Industrial Electronics, 2001. Proceedings. ISIE 2001. IEEE International Symposium on
Conference_Location :
Pusan
Print_ISBN :
0-7803-7090-2
DOI :
10.1109/ISIE.2001.931932
