New conceptual three-phase current-fed soft switching pulse width modulation converter with switched capacitor type resonant dc link

This paper presents a novel three-phase current source rectifier (CSR) for AC/DC step-down voltage conversion to reduce voltage and current stress. The proposed converter features an asymmetrical connection between upper and lower arms compared with conventional CSRs, but has the same number of devices. With the proposed asymmetrical structure and modified space vector pulse width modulation (SVPWM) scheme, half of transistors only need to withstand half of the line-to-line voltage rather than the full line-to-line voltage, and its DC link current can be shared by multiple switches in freewheeling periods. Therefore, it is able to bring about a significant reduction in voltage and current stress, allowing for an improvement in the converter without additional cost. The topological structure, operation principles, and comparative analysis are specifically presented. Finally, an experimental prototype is built up to verify the performance of the proposed converter.

Download Full-text

Three-phase current-fed soft switching PWM converter with switched capacitor type resonance DC link

30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321) ◽

10.1109/pesc.1999.785578 ◽

2003 ◽

Cited By ~ 2

Author(s):

Y. Konishi ◽

M. Ishibashi ◽

M. Nakaoka

Keyword(s):

Soft Switching ◽

Switched Capacitor ◽

Pwm Converter ◽

Phase Current ◽

Three Phase

Download Full-text

Three-phase current-fed soft-switching PWM converter with switched capacitor type resonant DC-link snubber

Electronics Letters ◽

10.1049/el:19981385 ◽

1998 ◽

Vol 34 (21) ◽

pp. 1996 ◽

Cited By ~ 1

Author(s):

Y. Konishi ◽

N. Baba ◽

M. Ishibashi ◽

Y.L. Feng ◽

M. Nakaoka

Keyword(s):

Soft Switching ◽

Switched Capacitor ◽

Pwm Converter ◽

Phase Current ◽

Three Phase

Download Full-text

Three-phase current-fed soft-switching PWM converter with switched capacitor type resonant DC-link

Seventh International Conference on Power Electronics and Variable Speed Drives ◽

10.1049/cp:19980515 ◽

1998 ◽

Cited By ~ 3

Author(s):

Y. Konishi

Keyword(s):

Soft Switching ◽

Switched Capacitor ◽

Pwm Converter ◽

Phase Current ◽

Three Phase

Download Full-text

Direct Regular Sampled Pulse Width Modulation Technique for a Three-Phase Current Source Inverter

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.793.226 ◽

2015 ◽

Vol 793 ◽

pp. 226-231

Author(s):

Syahrul Ashikin Azmi ◽

Mohd Azrik Roslan

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Current Source ◽

Space Vector Modulation ◽

Space Vector ◽

Digital Implementation ◽

Phase Current ◽

Harmonic Elimination ◽

Three Phase ◽

Vector Modulation

This paper proposes a new regular sampled pulse width modulation (PWM) for three-phase current source inverters. The theoretical basis of the proposed modulation strategy is described, including dwell time calculations and switching sequence selection. This strategy is well suited for digital implementation, and enjoys all the flexibilities and degree of freedoms as in space vector modulation. In addition, it ensures a minimum number of switching transitions per fundamental cycle, unlike other PWM methods. It is therefore promising for high-power medium-voltage applications. The validity of the proposed modulation strategy has been confirmed using simulation and experimentation. To furthermore substantiate the superiority of the proposed modulation strategy against other PWM methods, its performance is compared to sinusoidal PWM, selective harmonic elimination, and space vector modulation.

Download Full-text