Browsing by Author "Iqbal, A."

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A Single DC Source Nine-Level Switched-Capacitor Boost Inverter Topology with Reduced Switch Count
(Institute of Electrical and Electronics Engineers Inc., 2020) Siddique, M.D.; Alamri, B.; Salem, F.A.; Orabi, M.; Mekhilef, S.; Shah, N.M.; Sandeep, N.; Jagabar Sathik, J.S.; Iqbal, A.; Ahmed, M.; Ghoneim, S.S.M.; Al-Harthi, M.M.
This paper presents a new boost inverter topology with nine level output voltage waveform using a single dc source and two switched capacitors. The capacitor voltages are self-balancing and thus is devoid of any sensors and auxiliary circuitry. The output voltage is twice higher than the input voltage, which eliminates the need for an input dc boost converter especially when the inverter is powered from a renewable source. The merits of the proposed topology in terms of the number of devices and cost are highlighted by comparing the recent and conventional inverter topologies. In addition to this, the total voltage stress of the proposed topology is lower and have a maximum efficiency of 98.25%. The operation and dynamic performance of the proposed topology have been simulated using PLECS software and are validated using an experimental setup considering a different dynamic operation. © 2013 IEEE.
Primary side control strategies for battery charging regulation in wireless power transfer systems for EV applications
(John Wiley and Sons Inc, 2024) Vinod, M.; Kishan, D.; Kannan, R.; Iqbal, A.; Sulthan, S.
Resonant inductive-based wireless power transfer (WPT) for battery charging has potential applications in electric vehicles (EVs). The EV battery charging process requires the regulation of both charging voltage and current. Duty ratio or frequency control is generally preferred to manage the power flow between the transmitter and receiver coils in the WPT system. In the case of WPT charging, misalignment between the coils and parameter variations are unavoidable issues that result in changes to the output power. Therefore, it is essential to control the power flow to maintain constant current (CC) and constant voltage (CV) modes during battery charging. To address these challenges, various primary-side control techniques, such as asymmetric clamped mode (ACM), asymmetric duty cycle (ADC), and phase-shift (PS) fixed frequency control strategies, have been proposed for WPT systems. This paper conducts a comparative analysis of these control methods, considering their output voltage ranges and their ability to maintain zero-voltage switching (ZVS) for the entire control range. Furthermore, the paper presents a generalized design for reduced-order small signal modelling, utilizing an extended describing function. The designed controller, based on small signal modelling, will undergo real-time testing to evaluate its dynamic performance in the series-series resonant converter. © 2023 The Authors. IET Power Electronics published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.
A Single DC Source Nine-Level Switched-Capacitor Boost Inverter Topology with Reduced Switch Count
(2020) Siddique, M.D.; Alamri, B.; Salem, F.A.; Orabi, M.; Mekhilef, S.; Shah, N.M.; Sandeep, N.; Mohamed, Ali, J.S.; Iqbal, A.; Ahmed, M.; Ghoneim, S.S.M.; Al-Harthi, M.M.
This paper presents a new boost inverter topology with nine level output voltage waveform using a single dc source and two switched capacitors. The capacitor voltages are self-balancing and thus is devoid of any sensors and auxiliary circuitry. The output voltage is twice higher than the input voltage, which eliminates the need for an input dc boost converter especially when the inverter is powered from a renewable source. The merits of the proposed topology in terms of the number of devices and cost are highlighted by comparing the recent and conventional inverter topologies. In addition to this, the total voltage stress of the proposed topology is lower and have a maximum efficiency of 98.25%. The operation and dynamic performance of the proposed topology have been simulated using PLECS software and are validated using an experimental setup considering a different dynamic operation. 2013 IEEE.