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A Predictive Current Control Algorithm for Mixed Conduction Mode Operation of Boost PFC Converter

August 19 @ 2:00 pm - 3:00 pm

Date: 19/08/2019 (Monday)

Time: 2.00 pm

Venue: ESB 244

Speaker: Harish Sudhakaran Nair (EE15D052)

Guide: Dr. Lakshmi Narasamma

 

 

Abstract

Boost PFC converters are extensively used as the front-end stage in power supplies to ensure that the input current conforms to harmonic norms. The Mixed Conduction Mode (MCM) operation of boost PFC converters is gaining popularity due to the wide operating ranges of the converter and the lower boost inductance requirement in MCM which helps in improving the power density. In this operational mode, the inductor current is in continuous conduction mode (CCM) for a certain region and in discontinuous conduction mode (DCM) for the remaining region within a half line cycle. Due to the different characteristics of the converter in CCM and DCM, the current control of such a converter operating in MCM is a challenge. Most methods in literature require external mode detection circuits followed by appropriate current control laws for each mode. Other digital methods have higher computation time requirements. An improved predictive average current control algorithm for MCM operation of the boost PFC converter is proposed which offers good current tracking with low input current THD, is computationally simpler and does not require additional circuits. In this talk, the challenges in the MCM operation of the boost PFC converter and existing control methods will be discussed initially, followed by a detailed explanation of the proposed digital predictive current control algorithm validated with simulation and experimental results.

All are cordially invited.

Details

Date:
August 19
Time:
2:00 pm - 3:00 pm
Event Category:

Venue

ESB – 244
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