Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1993-03-03
1996-02-06
Nguyen, Matthew V.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
323285, H02M 112, G05F 140
Patent
active
054900557
ABSTRACT:
A switched mode power converter includes a periodically switched power switch which is switched under the control of a multiple loop feedback controlling the power switch in order to supply a regulated output. The output voltage and power switch current are sensed. An error voltage is generated which is representative of the deviation of the output voltage from a regulated value. A voltage derived from the power switch current is limited in its low frequency response and is then combined with the error voltage. The low frequency response of the current loop gain is used to maintain an advantageously low output impedance for the power supply. This shaped loop gain response advantageously allows accurate adjustment of the current loop gain and reduces the system to a lower order while maintaining adequate loop stability. The low frequency response may be attained by limiting the low frequency response of the sensed current or by inserting an operational amplifier in the feedback path to limit its low frequency response.
REFERENCES:
patent: 4333133 (1982-06-01), Pernyeszi
patent: 4816982 (1989-03-01), Severinsky
patent: 4866367 (1989-09-01), Ridley
patent: 4894520 (1990-01-01), Moran
patent: 4969079 (1990-11-01), Kiriyama et al.
patent: 5099406 (1993-03-01), Harada
patent: 5126931 (1993-06-01), Jitaru
patent: 5177676 (1993-01-01), Inam et al.
patent: 5180964 (1993-01-01), Ewing
patent: 5264782 (1993-11-01), Newton
patent: 5267138 (1993-11-01), Shores
"Closed-Loop Performance Comparisons of Switching Regulators with Current-Injected Control", G. K. Schoneman, D. M. Mitchell, IEEE Transactions on Power Electronics, vol. 3, pp. 31-43, Jan. 1988.
"Simple Switching Control Changes Power Converter into a Current Source", C. W. Deish, IEEE PESC Proceedings, 1978, pp. 324-335.
"A New Continuous-Time Model for Current-Mode Control with Constant Frequency, Continuous On-Time, and Constant Off-Time, in CCM and DDM", R. B. Ridley, IEEE PESC Proceedings, pp. 382-389, 1990.
"Simple Switching Control Method Changes Power Converter Into a Current Source" C. W. Deisch, IEEE PESC Proceedings, pp. 300-306, 1978.
"Topics in Multiple-Loop Regulators and Current-Mode Programming", R. D. Middlebrook, IEEE PESC Proceedings, pp. 716-732, 1985.
"Comparison of Performance of Single-Loop and Current-Injection-Control for PWM Converters Which Operate in Both Continuous and Discontinuous Modes of Operation", D. M. Sable, R. B. Ridley, B. H. Cho, IEEE PESC Proceedings, pp. 74.gtoreq.79, 1990.
"Analysis and Interpretation of Loop Gains of Multiloop-Controlled Switching Regulators", R. B. Ridley, B. H. Cho, F. C. Lee, IEEE Transactions on Power Electronics, pp. 489-498, 1988.
"Near-Optimum Dynamic Regulation of DC-DC Converters Using Feed Forward of Output Current and Input Voltage with Current-Mode Control", R. Redl, No. O. Sokal, IEEE Transactions on Power Electronics, pp. 181-192, vol. PE-1, No. 3, 1986.
"Small Signal Modeling of Average Current-Mode Control", R. B. Ridley, E. C. Lee, W. Tang, IEEE APEC Proceedings, 1992, pp. 747-755.
"Constant Frquency Forward Converter with Resonant Transitions", I. Jitaru HFPC `91 Proceedings, pp. 282-292.
Boylan Jeffrey J.
Rozman Allen F.
AT&T Corp.
Nguyen Matthew V.
Steinmetz Alfred G.
LandOfFree
Multiloop feedback control apparatus for DC/DC converters with f does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiloop feedback control apparatus for DC/DC converters with f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiloop feedback control apparatus for DC/DC converters with f will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2179223