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 | IET Power Electronics Volume 16, Issue 15 Pages: 2449-2623 25 November 2023 |
ORIGINAL RESEARCH
Open AccessNon‐contact and anti‐interference diagnosis of SiC MOSFET module bond wire faults for EV wireless charging device
Pages: 2449-2461 | First Published: 09 August 2023
The paper proposes a bond wire faults diagnosis of SiC MOSFET module for electric vehicle wireless charging device. This method can be completed through the charging coil, and the aging of resonant capacitors inside the device and the deviation of charging coil have little influence on the monitoring results.
Open AccessElectromagnetic transient suppression for thyristor switch‐based auto‐passing neutral section system
Pages: 2462-2471 | First Published: 19 October 2023
The auto-passing neutral section system with thyristor-based switches is a promising method to improve the continuity of power supply in electrified railways but with electromagnetic transient problems. This paper proposes suppression methods for reducing tran sient overvoltage and inrush current, simulation and experimental results show the feasibility of the proposed methods.
Open AccessNovel power distribution short‐circuit testing technique based on supercapacitor and modular multi‐ports AC/DC conversion
Pages: 2472-2481 | First Published: 17 August 2023
A novel short-circuit testing technique based on supercapacitor and modular multi-ports AC/DC conversion, which can realize the short-circuit test application economically and flexibly with expandable capacity, is proposed here.
Open AccessEnhanced asymmetrical modulation for half‐bridge series resonant inverters in induction heating applications
Pages: 2482-2491 | First Published: 07 September 2023
This paper presents an enhanced Asymmetrical Modulation for Half-Bridge Series Resonant Inverters in Induction Heating Applications to improve system reliability
Open AccessInvestigation of active cell balancing performance for series connected lithium‐ion cells in electric vehicle applications
Pages: 2492-2503 | First Published: 26 August 2023
Lithium ion batteries have a very wide application range. They can power up small electronic devices such as smart watches to larger electric vehicles. Due to its varied range of applications, they come in different packaging and in such battery packs, even when individual cell voltage exceeds by a few milli-volts above 4.2 V, it may result in thermal runaway and explode the cell. During discharge cycle, cell imbalances hinder the use of battery to its full capacity. This in turn decreases the battery lifetime. The individual battery cells should be equalized on a regular basis to keep the imbalances to a minimum and to have a good battery life. The process of balancing the individual cell charges by measuring the cell State of Charge (SoC) and its voltage in a battery pack is known as Cell Balancing. This paper details an active cell balancing technique that uses a buck converter for balancing a series connected battery pack of lithium-ion cells. The buck converter is constructed from two MOSFET switches, one turned on for charging the cells and the other one is used for discharging the cells. An algorithmic model that measures the individual cell voltages based on charge equalization is developed for a pack of series connected Li-ion battery cells. The developed model is simulated using MATLAB for verifying its performance. It is found that this algorithmic model produces a state of charge of 2.5% among the cells in a short period as compared to the conventional cell balancing technique. This parameter directly defines the cell equalization time and thus it is found that the system responds faster. The results show that this method can self-adaptively attain satisfactory performance within a limited equalizing period.
Open AccessReliable current control for single‐phase pulse width modulation rectifiers based on H∞ loop shaping controller
Pages: 2504-2514 | First Published: 22 August 2023
In this study H∞ loop shaping is designed for single-phase pulse width modulation (PWM) rectifier under current sensor gain faults. Pre-compensator is used to obtain the desired loop shape at all frequencies and robust stabilization through the normalized coprime factorization.
Open AccessExperimental analysis of advanced control technique for a five‐phase direct matrix converter based on space vector PWM
Pages: 2515-2524 | First Published: 01 September 2023
Here, authors have discussed the direct control based on different possible switching combinations of a three-phase to five-phase matrix converter (MC). The proposed control topology reduces the switching commutations significantly in a switching cycle when it is compared with its counterpart. The control is based on the modified space vector pulse width modulation (SVPWM) strategy. The proposed space vector scheme intelligently selects the voltage vectors to get the desired output characteristics with least possible switching transitions in a switching cycle.
Open AccessDepth comparison of common inductor and common capacitor passive current sharing methods for multiphase LLC converter
Pages: 2525-2548 | First Published: 26 August 2023
Common inductor (CIM) and (CCM) passive current-sharing methods have the advantages of simple implementation and low cost. However, there is still a lack of detailed comparative research on the two methods, which makes researchers confused when choosing the two methods. To provide clear scheme guidance, this paper provides a detailed compares the performance of the two methods.
Open AccessAnalysis and modelling of a phase‐locked loop based on a novel cascade structure of SOGI
Pages: 2549-2559 | First Published: 02 September 2023
Make two unique in-loop filter structures, namely cascade dual second-order generalized integrator (CDSOGI) and corresponding phase-locked loop structures. The proposed phase-locked loop's approximation small signal model based on CDSOGI is established, and the method for designing the system control parameters is also provided
Open AccessInverter open circuit fault diagnosis based on residual performance evaluation
Pages: 2560-2576 | First Published: 07 September 2023
This paper proposes an inverter open circuit fault diagnosis method based on residual performance evaluation. The fault detection is derived by comparing residual performance with the threshold. Besides, a current interval sliding mode observer is designed in the residual generation process.
Open AccessQuasi‐Z based adaptive sliding mode control for three‐phase photovoltaic grid‐connected system
Pages: 2577-2591 | First Published: 05 September 2023
A sliding mode controller based on adaptive reaching law is designed to effectively control the stability of DC (direct current, DC) chain voltage of quasi-Z-source inverter and reduce the capacitor voltage ripple, so that the photovoltaic system operates stably at the maximum power point during sudden changes in temperature and light conditions, and improves the grid-connection effect.
Open AccessEnhanced quadratic DC–DC boost converters with super‐wide voltage gain ranges and ultra‐low voltage stress for renewable energy systems
Pages: 2592-2605 | First Published: 04 September 2023
In this paper, by adopting the hybrid voltage multiplier cells, two enhanced quadratic boost converters (EQBCs) which are highly desirable for renewable energy applications are proposed and analyzed. Characteristics of the proposed converters include super-wide voltage gains, ultra-low voltage stress, single active switch operations, continuous input currents and grounded output terminals. Detailed principle analyses, parameter designs, performance comparisons and experimental prototypes are conducted to verify the characteristics and feasibilities of the EQBCs.
Open AccessHigh step‐up multi input–multi output DC–DC converter with high controllability for battery charger/EV applications
Pages: 2606-2623 | First Published: 14 September 2023
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