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One Cycle Control Controller

One-Cycle Control is a simple and versatile PWM technique applied to switching converters [1, 2]. This technique takes advantage of the pulsed and nonlinear nature of switching converters and achieves instantaneous dynamic control of the average value of a switched variable, e.g., voltage or current; more specifically it takes only one switching cycle for the average value of the switched variable to reach a new steady-state after a transient. There is no steadystate error nor dynamic error between the control reference and the average value of the switched variable. This method provides fast dynamic response, excellent power source perturbation rejection, robust performance, and automatic switching error correction.


One Cycle Control is used in power factor corrected (PFC) rectifiers, active power filters (APF) and grid-connected inverters.


[1] Keyue M. Smedley and Slobodan Cuk. "One-Cycle Control of Switching Converters". IEEE Transactions on Power Electronics. Vol 10, No. 6. Nov, 1995
[2] Keyue Smedley. "One-Cycle Control and Its Applications in Power-Quality Control and Renewable Power Generation". Dept. of Electrical and Computer Engineering University of California Irvine. 2008. URL: http://www.nfcrc.uci.edu/2/FUEL_CELL_INFORMATION/UFFC/PowerElectronics/PDFs/08_Smedley.pdf

Key Technology Area: 
Advanced Components

Sample Vendors:
Name Product description Submitted on Submitted by Affiliation Contact information
International Rectifier 09/30/10


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