International Journal of Power Electronics (7 papers in press)

Regular Issues

• Modelling of an integrated grid-connected three-phase current source unidirectional buck battery charger for electric traction application  
  by Izuchukwu Nnanna Eze, Linus Uchechukwu Anih, Cosmas Uchenna Ogbuka 
  Abstract: The difficulty of accessing controlled fast battery charging station in some geographical areas for electric vehicles necessitates one of the ideas of integrated motor drive and battery charging unit. To integrate the charger into the traction motor, one of the stator windings of the split-phase interior permanent magnet synchronous motor is connected to three-phase utility supply while the second stator winding feeds the extra-provided power electronic charger circuit. To this end, a unique complex q-d analytical equational control is used to realise the pulse width modulation (PWM) instead of the traditional PWM method. Current source control technique is employed in the charger control structure in lieu of voltage source converter (VSC) control topology. The reduction in grid line current harmonic distortion is 69.6% compared to VSC topology. Transfer function is developed to calculate the current and voltage control system proportional integral parameters. MATLAB study confirms the efficacy of the configuration.
  Keywords: split-phase; proportional integral; PI; Butterworth coefficient; current harmonic; electric vehicle.
  DOI: 10.1504/IJPELEC.2025.10069462
   
  
• Soft switching and soft starting of TCHB converter-based dual active bridge converter by using SPS and EPS control techniques  
  by Amit Kumar, Abdul Hamid Bhat, Pramod Agarwal  
  Abstract: Renewable energy has significant potential for future electric networks, and direct current (DC) technology offers a viable solution to address related challenges. Efficient DC-DC converters are essential for achieving high voltage step-up ratios. This work presents a novel bidirectional soft-switching DC-DC converter that integrates a two-level converter on the low-voltage side and a transistor-clamped h-bridge (TCHB) multilevel converter on the high-voltage side. A phase-shift control method is employed to manage bi-directional power flow in a resonant converter operating at higher frequencies. The proposed method ensures soft-switching for all power devices across the entire power spectrum, enabling smooth transitions between power directions. Current stress measurements indicate significant reductions: from 19 A to 2 A in single-phase shift (SPS) and from 16 A to 1.6 A in extended phase shift (EPS). The performance of the same converter is validated through MATLAB/Simulink simulations and real-time experiments using an OPAL-RT simulator, demonstrating improved efficiency and reduced switching stress.
  Keywords: dual active bridge; DAB; extended phase shift; EPS; single phase shift; SPS; soft switching and soft starting; state of charge; transistor clamped h-bridge inverter.
  DOI: 10.1504/IJPELEC.2025.10069940
   
  
• Hardware design and implementation for Class-E power amplifier for Qi compatible wireless power transfer for consumer electronics  
  by Avishek Munsi, Rohan Kumar, Kunwar Aditya 
  Abstract: This paper presents the design of a Class E power amplifier tailored for wireless power transfer applications, with an emphasis on achieving system compactness. The amplifier operates at a switching frequency of 100 kHz and delivers an output power of 15 W, conforming to Qi standards. A series-series topology was chosen for the wireless power transfer system. To achieve zero voltage switching (ZVS), the primary side was tuned to a frequency slightly lower than the switching frequency, eliminating the need for an additional inductor. This innovation results in a more compact and cost-effective system without compromising performance. To ensure effective power transfer, the secondary side was tuned to resonate at the switching frequency. Design calculations were validated using LTspice simulations and hardware implementations. This paper also evaluates the efficiency of the designed converter and provides an analysis of power loss. The proposed system is primarily intended for consumer electronics applications, such as cell phone chargers, offering a simplified and efficient solution.
  Keywords: wireless power transfer; WPT; Class-E amplifier; battery charger; zero voltage switching; ZVS; Qi standard.
  DOI: 10.1504/IJPELEC.2025.10069941
   
  
• Nonlinear adaptive feedback linearisation-based backstepping controller design for islanded DC microgrid  
  by Shipra Jain, Rajesh Kr. Ahuja, Anju Gupta 
  Abstract: The solar-powered DC microgrid using adaptive feedback linearisation-based backstepping neural network controller (FLBNNC) is able to get the desired bus voltage with enhanced transient and steady-state responses. The uncertainties in the solar panel are caused by varying irradiance and temperature which will cause the solar current to vary. Hence in the proposed controller, the varying current is approximated by the Hermite neural network. Similarly, at the battery source and battery load, the varying impedance due to charging and discharging are approximated by the neural network in the proposed adaptive feedback linearisation-based backstepping neural network controller. The controller is novel and has simple mathematics, less data computation, and reduced burden. The overall analysis has been revealed in terms of rise time (sec), settling time (sec), peak overshoot (%) for the different conditions like start up response, grid reference voltage variation from 48-60 V, battery state of charge (SOC) for less 10%. The effectiveness of the proposed controller is compared with the conventional PID and backstepping controller (BSC). From the analysis, it is evident that the proposed controller (FLBNNC) is able to provide minimum settling time (sec) and rise time (sec), reduced peak overshoot (%) in comparison to PID and BSC which maintains the constant and smooth voltage at the grid terminal.
  Keywords: adaptive backstepping controller; battery energy storage system; DC microgrid; Lyapunov function.
  DOI: 10.1504/IJPELEC.2025.10069413
   
  
• MPWM full-bridge converter for voltage spike-free current doubler rectifier performance in vehicular applications  
  by Kirti Mathuria, Harpal Tiwari 
  Abstract: This paper describes an efficient bridge DC-DC converter for vehicular applications. Zero voltage switching (ZVS) for active switching is possible with the current-doubler rectifier (CDR). The presented configuration uses the energy stored in the filters' inductors to perform soft switching in a wide load range. Moreover, no voltage oscillations or spikes occur due to the rectifier diodes, and duty cycle loss is low. The simulation and test results detailed the converter's functions. A hardware configuration of 500 watts at 80 kHz has been used to validate the simulation results. A DSP controller board with the model number TMS320F28379D produces real-time gating signals.
  Keywords: full bridge DC-DC converter; soft switching; electric vehicles; EVs; zero voltage switching; ZVS; modified pulse width modulation; MPWM; high frequency transformer; HFT.
  DOI: 10.1504/IJPELEC.2025.10069463
   
  
• An efficient fault diagnosis model using Lappet Falco optimisation based on a deep neural network for the VSI under varying load conditions  
  by Vaishali Baste, Dipali Shende, Seema Idhate, Arya Deshpande 
  Abstract: Numerous industrial applications employ three-phase converters that are based on insulated-gate bipolar transistors (IGBTs). However, the functioning and safety of power electronic devices and loads can be considerably impacted by IGBT faults. Maintaining high-power quality and system availability requires timely and accurate detection of power inverter failures. Constantly monitoring the failures in three-phase voltage source inverter (VSI) has greatly improved maintenance efficiency and stability. Hence, the developed research employs the discrete wavelet transform (DWT) and Lappet Falco optimised deep neural network (LFO-DNN) model to create an open circuit fault detection model for the VSI circuit. Data collection involves extracting features such as three-phase voltage, current, speed, and torque from erroneous data. The DNN classifier trained on these features uses the average three-phase current value to identify faulty switches. The VSI acting as a load with variable frequency reference is connected to a three-phase induction motor. The proposed Lappet Falco optimisation accurately yields impressive results in terms of prediction accuracy of 96.34%, precision of 96.34%, recall of 96.24%, F1 measure of 94.23%, MSE of 3.66, and specificity of 95.28%, demonstrating high efficiency for both 90% training and a k-fold value of 10.
  Keywords: voltage source inverter; VSI; insulated-gate bipolar transistors; IGBTs; open circuit fault; deep neural network; DNN; Lappet Falco optimisation; LFO; discrete wavelet transform; DWT.
  DOI: 10.1504/IJPELEC.2025.10068618
   
  
• A novel 11-level active boost neutral point clamped inverter based on switched-capacitor units' integration  
  by Seyed Jafar Salehi, Seyed Mostafa Ghadami, Mohammad Akbari-Farmanbar, Yaser Habibi, Amard Afzalain 
  Abstract: This paper introduces a novel boost 11-level type active neutral point clamped (ANPC) inverter aggregated with switched-capacitor (SC) units. This topology comprises 12 switches, four DC-link/floating capacitors, and a single fixed DC source. Traditional ANPC topologies present a low voltage gain and a low number of output voltage levels leading to an increase in the device count. In this work, in addition to the boosting feature (as much as 2.5V_dc), a high number of voltage level (11) is also achieved. The proposed structure does not use the back-end H-bridge (BEHB) unit. For this reason, the maximum blocking voltage (MBV) value across the switches is restricted to only 2V_dc. The floating capacitors placed in the SC unit are guaranteed to be charged at each half-cycle of the fundamental frequency to mitigate the capacitor voltage ripples aligned with the current spikes. To ensure the correct operation of the suggested structure, several simulations and experimental results are accomplished by MATLAB and Arduino Due-based ARM cortex-M3 core, respectively, under the nearest level control (NLC) switching technique, various impedance loads, and variations in modulation index.
  Keywords: multilevel inverter; active neutral point clamped; ANPC; voltage-boosting; switched-capacitor; nearest level control.
  DOI: 10.1504/IJPELEC.2025.10069541