Using feedforward digital control to improve the power quality of a three-channel BCM boost converter for PFC applications
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Ryan, Robert T.
Hayes, John G.
Morrison, Richard J.
Hogan, Diarmuid N.
Institute of Electrical and Electronics Engineers (IEEE)
This paper proposes a simple and effective digital feedforward algorithm to improve the power quality of a boundary-conduction-mode (BCM) boost converter for power-factor-correction (PFC) applications. BCM boost converters suffer from a zero-crossing distortion of the line current caused by the valley switching of the converter. The feedforward algorithm works by increasing the switch on-time around the zero crossing of the line voltage, which in turn increases the line current at this point. The feedforward algorithm has a very simple design procedure and implementation requiring only a single look-up table (LUT) in microcontroller software. The algorithm is implemented on a 1 kW interleaved 3-channel BCM boost converter which operates with an input rms line voltage of 85 V to 265 V, and an output voltage of 400 V. Experimental results are given for the prototype converter demonstrating a significantly improved power quality, when the feedforward algorithm is used.
Control engineering computing , Digital control , Feedforward , Microcontrollers , Power convertors , Power engineering computing , Power factor correction , Power supply quality , Table lookup , Zero crossing , Line voltage , Line current , Simple design procedure , Improved power quality , Feedforward digital control , Three-channel BCM boost converter , PFC applications , Effective digital feedforward algorithm , Boundary-conduction-mode boost converter , Power-factor-correction applications , Zero-crossing distortion , Switch on-time , Simple digital feedforward algorithm , Single look-up table , Microcontroller software , Interleaved 3-channel BCM boost converter , Power 1.0 kW , Voltage 400.0 V , Voltage 85.0 V to 265.0 V , Inductors , Switches , Distortion , MOSFET , Capacitors , Capacitance , Power quality
Ryan, R. T., Hayes, J. G., Morrison, R. J. and Hogan, D. N. (2019) 'Using Feedforward Digital Control to Improve the Power Quality of a Three-Channel BCM Boost Converter for PFC Applications', 2019 IEEE Applied Power Electronics Conference and Exposition (APEC), Anaheim, CA, USA, 17-21 March 2019, pp. 1743-1750. doi: 10.1109/APEC.2019.8722087
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