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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： Bar Halivni Mor Mordechai Peretz Department of Electrical and Computer Engineering The Center for Power Electronics and Mixed-Signal IC Ben-Gurion University of the Negev Beer-Sheva Israel

This paper introduces a current controlled transmitter for WPT based on a differential Class E inverter with dual symmetrical LCL resonant networks for the transmitter and the receiver. The current control loop is implemented using a digital controller that maintains constant transmitter circulating current by adjusting the inverter input voltage using a pre-regulation stage. High frequency accurate current measurement has been carried out by a non-invasive, PCB integrated Rogowski current sensor. Sensor optimization procedure, and design considerations for the PCB integrated current sensor has been demonstrated via ANSYS MAXWELL simulation and verified experimentally. The differential Class E inverter operates in real-time ZVS operation using dedicated high frequency ZVS sensors with only few nano-second delay. The current controlled transmitter operation has been tested on a 12MHz 100W experimental prototype with all the required peripherals and sensing circuitry, alongside a capacitive medium emulator. The experimental prototype achieves peak efficiency of 83% and superior thermal performance.

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Coupled Inductor Based Non-Isolated High Conversion Ratio Boost Extender

Coupled Inductor Based Non-Isolated High Conversion Ratio Bo...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： Vikas Kumar Rathore Michael Evzelman Mor Mordechai Peretz Department of Electrical and Computer Engineering The Center for Power Electronics and Mixed-Signal IC Ben-Gurion University of the Negev Beer-Sheva Israel

A coupled inductor based non-isolated boost extender with high conversion ratio is presented. The topology features higher power density due to the lower physical inductor cores count, with similar efficiency and component stresses as a conventional boost extender. Topology analysis, and its suitability for multiple extension inductor coupling is shown, coupling coefficient impact on the converter performance, and a short design guide is presented. An analysis and design of coupled inductor is demonstrated, and experimental prototype of 200W is developed and tested in the laboratory. The experimental prototype operated at maximum efficiency of 94.4% providing step up conversion ratio of 10.5, employing a coupled inductor the size of a single inductor of the conventional boost extender converter. The theoretical predictions were found to be in a good agreement with experimental results.

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Coupled Inductor Analysis and Finite Element Modeling Assisted design for Boost Extender Topology 14

Coupled Inductor Analysis and Finite Element Modeling Assist...

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14th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2025

作者： Rathore, Vikas Kumar Evzelman, Michael Peretz, Mor Mordechai Ben-Gurion University of the Negev The Center for Power Electronics and Mixed-Signal Ic Department of Electrical and Computer Engineering P.O. Box 653 Beer-Sheva8410501 Israel

ISBN: (纸本)9798331516116

Theoretical and finite element analysis of four coupled inductor structures based on the common cores suitable for Boost Extender topology is presented. The impact of each setup on the boost extender topology is evaluated and a design method that targets optimal operation point of the converter is demonstrated. Coupled inductors built around the most popular EE and UU cores are examined. The impact on the self-inductance of each winding and the coupling coefficient between the windings as a function of the air gap size and location are evaluated. It was found that a UU core structure based coupled inductor is a good candidate to address the challenges of the losses and parasitic ripple generated due to the coupling between the two inductors in the boost extender converter. Theoretical predictions agree well and are complemented by a finite element magnetic simulation software suite ANSYS Maxwell, which is then validated experimentally on a full scale 100W experimental prototype. © 2025 IEEE.

关键词： Topology

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Deterministic Policy Gradient based Reinforcement Learning for Current Control of Hybrid Active Power Filter

Deterministic Policy Gradient based Reinforcement Learning f...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Cheng Gong Chio-Hong Leong Chi-Seng Lam State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau China Institute of Microelectronics University of Macau Macau China Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau Macau China

ISBN: (数字)9798350330991

ISBN: (纸本)9798350331004

The hybrid active power filter (HAPF) emerges as a cost-effective remedy for power quality challenges in medium voltage power systems. The success of HAPF, crucially, hinges on the efficacy of its current control mechanism. This paper introduces a novel approach by proposing a deterministic policy gradient based reinforcement learning (DPG-RL) as the current control strategy for HAPF. In stark contrast to conventional model-based control methods, the DPG-RL leverages artificial intelligence (AI) technology, rendering it model-free and capable of dynamically seeking the optimal control policy to enhance HAPF performance. A notable advantage lies in its significantly lower computational burden during each sampling period, distinguishing it from other contemporary AI-aided control methods. The paper outlines a systematic design process, encompassing feature selection and reward function design, to formulate the RL problem. The comprehensive design procedure of DPG-RL is then detailed. Simulation results are subsequently presented, validating the effectiveness and reliability of the proposed DPG-RL across diverse operational scenarios.

关键词： Current control Systematics Computational modeling Simulation Optimal control Reinforcement learning Active filters

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Model Predictive Robust Control for A Capacitive-Coupling Grid-Connect Inverter (CGCI) in Power Quality Compensation

Model Predictive Robust Control for A Capacitive-Coupling Gr...

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Annual Conference of Industrial Electronics Society

作者： Pak-Ian Chan Wai-Kit Sou Chi-Seng Lam State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau China Institute of Microelectronics University of Macau Macau China Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau Macau China

ISBN: (数字)9781665464543

ISBN: (纸本)9781665464550

In this paper, a model predictive robust control (MPRC) is proposed for a three-phase capacitive-coupling grid-connect inverter (CGCI) to improve the power quality compensation performance under deviating system parameters. A detail stability study and parameter design of the proposed MPRC is provided, while the robustness and power quality compensation performance of the proposed MPRC are verified by the simulation in comparison to the conventional model predictive control (MPC).

关键词： Robust control Simulation Power quality Predictive models Power system stability Robustness Inverters Stability analysis Voltage control Predictive control

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H∞optimal control design of static var compensator coupling hybrid active power filter based on harmonic state-space modeling

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CPSS Transactions on Power Electronics and Applications 2021年第3期6卷 227-234页

作者： Gong, Cheng Sou, Wai-Kit Lam, Chi-Seng State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macao 999078 China also with the Institute of Microelectronics University of Macau Macao 999078 China and also with the Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau Macao 999078 China

Compared with the conventional active power filter (APF), the static var compensator coupling hybrid active power filter (SVC-HAPF) has distinct characteristics of low DC-link operating voltage, which can lower the system and operational costs. It also has a wider operational range than the conventional hybrid active power filter (HAPF). In this paper, a harmonic state-space (HSS) modeling is firstly proposed to address the nonlinearity issue of the SVC-HAPF. The HSS based SVC-HAPF model is linear time-invariant (LTI), which enables the optimal control techniques. Then, the linear matrix inequality (LMI) based H∞ optimal control design is proposed, which finds the optimal controller parameters via convex optimization algorithm. The proposed controller for the SVC-HAPF achieves high steady-state accuracy, fast transient response, and fixed switching frequency simultaneously. Finally, simulation and experimental results are also provided to verify the effectiveness and performance of the optimal controller for the SVC-HAPF in comparison with the recent developed state-of-the-art multi-quasi-proportional-resonant (MQPR) controller, which shows superior control performances. © 2017 CPSS.

关键词： State space methods

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A 23-nA Quiescent Current Output-Capacitorless LDO Regulator for IoT Devices

A 23-nA Quiescent Current Output-Capacitorless LDO Regulator...

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International Conference on ASIC

作者： Shengnan Zhou Xiangyu Mao Cheng Huang Rui P. Martins Yan Lu State Key Laboratory of Analog and Mixed-Signal VLSI Institute of Microelectronics and FST-DECE University of Macau Macao China Department of Electrical and Computer Engineering Iowa State University Ames USA

This paper presents an ultra-low quiescent current output-capacitorless low dropout regulator (OCL-LDO) with fast transient response. We design a rail-to-rail error amplifier with improved adaptive biasing, which provides a limited bias current at heavy load for better load regulation. The buffer with adaptive biasing and almost zero input-output voltage shift and embedded body-bias, combines the error amplifier and the gate of M P . The proposed LDO is designed in a 65-nm CMOS process. Simulation result shows that the proposed LDO consumes a quiescent current of only 23 nA at a supply voltage of 0.8 V. The voltage undershoot is 98 mV during a 20-mA maximum load transient. And we obtain a FOM T of 0.00023 ps.

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Improved Dead-Beat Control for Single-Phase LC-Coupling Hybrid Active Power Filter (LC-HAPF)

Improved Dead-Beat Control for Single-Phase LC-Coupling Hybr...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Pak-Ian Chan Wai-Kit Sou Chi-Seng Lam State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macao China Institute of Microelectronics University of Macau Macao China Department of Electrical and Computer Engineering University of Macau Macao China

In this paper, an improved dead-beat controller (DBC) for a single-phase LC-coupling hybrid active power filter (LC-HAPF) is proposed to achieve both low steady-state error and fast transient response. The conventional DBC has an inherent discretized and predictive error, which can increase the steady-state error. Thus, a signal correction technique is used to reduce the steady-state error. Moreover, the improved DBC is implemented with a coupling capacitor voltage observer to replace the voltage sensor, thus reducing the system cost. After that, the stability analysis and parameter design of the proposed improved DBC for the LC-HAPF are given in detail. Subsequently, to verify the effectiveness of the improved DBC, the simulation results are provided in comparison to the conventional DBC.

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Filtering Balun design using Hairpin-Ring Resonator and SSPP Metamaterial with Wide Notched band and Wide Stopband

Filtering Balun Design using Hairpin-Ring Resonator and SSPP...

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IEEE International Wireless Symposium (IWS)

作者： Huanhuan Qi Haiwen Liu Mo Huang School of Information and Communications Engineering Xi’ an Jiaotong University Xi'an China State Key Laboratory of Analog and Mixed-Signal VLSI Faculty of Science and Technology Department of Electrical and Computer Engineering Institute of Microelectronics University of Macau Macao China

In this paper, a novel filtering balun based on microstrip-to-slotline transition is proposed. Utilizing the inherent out-of-phase electric field distributions on the adjacent grounds of slotline, the balun function is realized. In order to realize the wide notched-band and stopband performance for radio astronomical applications, spoof surface plasmon polariton (SSPP) metamaterial and multi-mode hairpin ring resonators (HRRs) are adopted. With these novel structures loaded, the proposed filtering balun exhibits a wide band from 1GHz to 6 GHz. The notched band is from 3.2 GHz to 4.4 GHz, within the notched band, the rejection level is better than 15 dB. Besides, the out-of-band suppression is below 35 dB in the wide frequency range from 6 GHz to 8 GHz.

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A Dual-Inductor Quad-Path Hybrid Buck (2L4PHB) Converter With Reduced Inductor Current

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IEEE Journal of Solid-State Circuits 2025年

作者： Zeng, Wen-Liang Cai, Guigang Lu, Yan Sin, Sai-Weng Martins, Rui P. Lam, Chi-Seng State Key Laboratory of Analog and Mixed-Signal Vlsi University of Macau Macau999078 China Institute of Microelectronics University of Macau Macau999078 China Department of Electrical and Computer Engineering Princeton University PrincetonNJ08544 United States Guangzhou510530 China Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau Macau999078 China Department of Electronic Engineering Tsinghua University Beijing100084 China Instituto Superior Tecnico Universidade de Lisboa Lisbon1049-001 Portugal

In high-efficiency 12-to-1-1.8-V applications, the small duty ratio (D ≈ 0.1) and high voltage stress on power switches of the conventional buck converter bring significant efficiency penalty. This article proposes a dual-inductor quad-path hybrid buck (2L4PHB) converter that addresses these issues, achieving both high power conversion efficiency and power density. Compared to the widely used double step-down (DSD) converter, the proposed 2L4PHB converter reduces the average inductor current by 30% and the inductor current ripple by 18% at a voltage conversion ratio (VCR) of 0.15. In addition to continuous conduction mode (CCM), this design incorporates a discontinuous conduction mode (DCM) calibration loop to improve efficiency at light loads. The proposed 2L4PHB converter, fabricated in a 180-nm BCD process, achieves a maximum current density of 0.18 A/mm2 and 256 A/cm3 and a peak efficiency of 93.7% and maintains efficiencies above 85% across load currents ranging from 0.6 to 4 A, all while using a compact inductor with dimensions of 2.5 × 2.0 × 1.0 mm3 and a DCR of 48 mΩ. © 2025 IEEE.

关键词： Buck converter

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