A novel three-phase three-switch three-level high power factor SEPIC-type AC-to-DC converter

In this paper, the topology of a new three-phase three-switch three-level PWM rectifier system is derived based on the basic structure of a DC-to-DC SEPIC power converter. The system is characterized by full controllability of the power flow (independent of the level of the output voltage) and by a sinusoidal mains current shape in phase with the mains voltage. The operating principle of the power converter is explained based on the conduction states of a bridge leg within a pulse period. The stationary operating behavior is analyzed by digital simulation based on the control of the mains phase currents by independent ramp-comparison controllers. Furthermore, a mathematical description of the operating behavior of the three-phase system including the coupling of the phase current controllers (given due to the floating mains star point) is discussed. Finally, results of an experimental investigation of a laboratory model of the power converter are presented.

[1]  Dushan Boroyevich,et al.  Novel reduced-order small-signal model of a three-phase PWM rectifier and its application in control design and system analysis , 1996 .

[2]  M.P. Kazmierkowski,et al.  Review of current regulation methods for VS-PWM inverters , 1993, ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings.

[3]  Johann W. Kolar,et al.  Status of the techniques of three-phase rectifier systems with low effects on the mains , 1999, 21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007).

[4]  Fred C. Lee,et al.  Topological constraints on basic PWM converters , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[5]  Johann W. Kolar,et al.  A novel three-phase utility interface minimizing line current harmonics of high-power telecommunications rectifier modules , 1997, IEEE Trans. Ind. Electron..

[6]  Joachim Holtz.  Pulsewidth modulation-a survey , 1992, IEEE Trans. Ind. Electron..

[7]  W. Mcmurray,et al.  Modulation of the Chopping Frequency in DC Choppers and PWM Inverters Having Current-Hysteresis Controllers , 1983, IEEE Transactions on Industry Applications.

[8]  Kouichi Ishizaka,et al.  SEPIC-derived three-phase sinusoidal rectifier operating in discontinuous current conduction mode , 1995 .

[9]  I. Nagy.  Improved current controller for PWM inverter drives with the background of chaotic dynamics , 1994, Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics.

[10]  W. Koczara,et al.  Unity power factor three phase rectifiers , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.

[11]  Esam H. Ismail,et al.  Single-switch 3/spl phi/ PWM low harmonic rectifiers , 1996 .

[12]  L. Rossetto,et al.  Single-switch three-phase AC/DC converter with high power factor and wide regulation capability , 1992, [Proceedings] Fourteenth International Telecommunications Energy Conference - INTELEC '92.

[13]  D. Boroyevich,et al.  Novel reduced-order small-signal model of three-phase PWM rectifiers and its application in control design and system analysis , 1996, PESC Record. 27th Annual IEEE Power Electronics Specialists Conference.

[14]  J. Sebastian,et al.  A novel three-phase AC-DC power factor preregulator , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[15]  L. H. Dixon,et al.  Average current mode control of switching power supplies , 1990 .

[16]  J. Kolar,et al.  Influence of the modulation method on the conduction and switching losses of a PWM converter system , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[17]  Donald W. Novotny,et al.  Current Control of VSI-PWM Inverters , 1985, IEEE Transactions on Industry Applications.

[18]  C.M.T. Cruz,et al.  A low cost high power factor three-phase diode rectifier with capacitive load , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.