Design of an H/sup /spl infin// robust controlled single-stage converter with high power factor and fast regulation

This paper presents the design of an H/sup /spl infin// robust controlled single-stage power converter (SSC) operating in the discontinuous conduction mode (DCM) to achieve high power factor and fast output regulation. With the grafted scheme, a buck-boost power converter and a flyback power converter can be integrated to form the proposed SSC. The buck-boost semi-stage operating in the DCM functions as a power factor corrector and the flyback semi-stage operating in the DCM acts as a voltage regulator. With a proper control, the DC-link voltage is independent of load variation. A small-signal model of the SSC operating in the DCM is developed based on the two-part networks theory. An H/sup /spl infin// robust control is adopted to design a proper controller to achieve system stability and dynamic performance. Simulation results of the proposed robust controlled system and an optimal PI controlled scheme are presented for comparison purpose. Hardwave measurements have shown the feasibility of the proposed system.

[1]  Fred C. Lee,et al.  Hybridized off-line 2-MHz zero-current-switched quasi-resonant converter , 1989 .

[2]  J. G. Ziegler,et al.  Optimum Settings for Automatic Controllers , 1942, Journal of Fluids Engineering.

[3]  B. Francis,et al.  A Course in H Control Theory , 1987 .

[4]  R. Redl,et al.  Design considerations for single-stage isolated power-factor-corrected power supplies with fast regulation of the output voltage , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[5]  J. L. Lin,et al.  /spl mu/-based controller design for a DC-DC switching power converter with line and load variations , 1996, Proceedings of the 1996 IEEE IECON. 22nd International Conference on Industrial Electronics, Control, and Instrumentation.

[6]  P. Khargonekar,et al.  State-space solutions to standard H/sub 2/ and H/sub infinity / control problems , 1989 .

[7]  Abraham Pressman,et al.  Switching Power Supply Design , 1997 .

[8]  K.-H. Liu,et al.  Current waveform distortion in power factor correction circuits employing discontinuous-mode boost converters , 1989, 20th Annual IEEE Power Electronics Specialists Conference.

[9]  Esam H. Ismail,et al.  Integrated high quality rectifier-regulators , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[10]  Milan M. Jovanovic,et al.  Reduction of voltage stress in integrated high-quality rectifier-regulators by variable-frequency control , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[11]  P. Khargonekar,et al.  State-space solutions to standard H2 and H∞ control problems , 1988, 1988 American Control Conference.

[12]  D. Borojevic,et al.  Robust nonlinear control for boost converter , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.

[13]  S. Hiti,et al.  Robust nonlinear control for boost converter , 1993 .

[14]  Tsai-Fu Wu,et al.  An alternative approach to systematically modeling PWM DC/DC converters in DCM based on the graft scheme , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[15]  C. L. Smith,et al.  Computer process control , 1971 .

[16]  Y. S. Lee,et al.  Single-switch fast-response switching regulators with unity power factor , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[17]  Shmuel Ben-Yaakov,et al.  H/sup /spl infin// control applied to boost power converters , 1997 .

[18]  Fred C. Lee,et al.  Isolated boost circuit for power factor correction , 1993, Proceedings Eighth Annual Applied Power Electronics Conference and Exposition,.

[19]  R. Redl,et al.  A new family of single-stage isolated power-factor correctors with fast regulation of the output voltage , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[20]  R. Redl.  An economical single-phase passive power-factor-corrected rectifier: topology, operation, extensions, and design for compliance , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.