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 | IET Power Electronics Volume 17, Issue 3 Pages: 351-485 19 February 2024 |
ORIGINAL RESEARCH
Open AccessA MCR‐WPT system based on LCL‐S/P hybrid compensation network with CC/CV and maximum power optimization suiting for battery charging
Pages: 351-363 | First Published: 16 January 2024
This thesis proposes a novel magnetically coupled resonant wireless energy transfer system for battery charging with constant current and voltage output characteristics.
Open AccessDesign considerations of series type hybrid circuit breaker (S‐HCB)
Pages: 364-374 | First Published: 25 January 2024
Design considerations of a series-type hybrid circuit breaker (S-HCB) offering ultralow power loss and microsecond scale fault interruption were discussed. System level design equations were provided as a guide for S-HCB circuit component selection for multiple MVDC circuit breaker voltage and current ratings. S-HCB system energy flow analysis is performed in time domain to provide an understanding of the full energy cycle and conservation in normal operation and during the fault interruption process.
Open AccessA novel bidirectional DC–DC converter with high voltage conversion ratio and capability of cancelling input current ripple
Pages: 375-393 | First Published: 16 January 2024
The proposed DC–DC converter uses two coupled inductors and switched-capacitor circuit to increase the voltage conversion ratio. The input current ripple at low voltage side can be eliminated for a pre-selected duty cycle by adjusting special values of magnetizing inductances of coupled inductors. The input current is divided into two paths of the primary winding of coupled inductors that causes the decrease in the current stresses of switches.
Open AccessDriver optimization of high power converter based on BIGT reverse conduction loss
Pages: 394-401 | First Published: 10 January 2024
This paper investigates the relationship between Bi-mode Insulated Gate Transistor's (BIGT's) on-state voltage drop in diode mode and its gate-emitter voltage in detail. Furthermore, a novel driver optimization scheme is proposed to automatically lower the gate voltage during reverse conduction, which can effectively reduce the reverse on-state losses of the BIGT.
Open AccessEstimating the potential maximum power point based on the calculation of short‐circuit current and open‐circuit voltage
Pages: 402-421 | First Published: 10 January 2024
Proposed operation point 0.4 Voc to determine Isc value instead of calculating at 0.2 Voc position. Then calculate Isc and Voc based on I(V) curve of photovoltaic system to quickly identify potential maximum power point locations based on these values. Determine the Isc and Voc according to operating conditions to limit calculation errors and reduce pressure on switches.
Open AccessA novel vector control strategy for sensorless 3φ induction machines under single‐phase fault
Pages: 422-437 | First Published: 13 January 2024
A novel rotor flux-based vector control strategy for Y-connected 3φ induction machines without speed sensor under the single-phase fault is proposed. Furthermore, a simple model-based single-phase fault detection mechanism based on the extended Kalman filter is suggested. The performance of the proposed control scheme for a 1 HP sensorless Y-connected 3φ induction machine prototype is validated by several experiments.
Open AccessSensorless model predictive control of permanent magnet synchronous motor based on hybrid parallel observer under parameter uncertainty
Pages: 438-449 | First Published: 13 January 2024
Model predictive control-based permanent magnet synchronous motor drive system has high dependence on parameter accuracy, while the traditional single observer architecture makes it difficult to solve the multi-parameter observation problem. By constructing an adaptive parameter observer and a sliding mode observer working in parallel, the variable exchange mechanism between the observers is designed and the current prediction model is reconstructed. The proposed algorithm improves the position identification precision under the uncertainty of the motor resistance and inductance, reducing the dependence of model parameters and improving the performance of sensorless model predictive control under parameter uncertainty.
Open AccessModel predictive current control based on hybrid control set for permanent magnet synchronous motor drives
Pages: 450-462 | First Published: 18 January 2024
The proposed MPCC method focuses on a hybrid control set, combining with deadbeat control method to solve the logic relationship of different voltage vector combinations and their durations. The cost function is based on the non-integral time prediction. The proposed MPCC method can maintain stability within a certain range of parameter mismatches.
Open AccessA charging equalizer based on Zeta converter for hybrid energy storage system
Pages: 463-472 | First Published: 07 February 2024
This thesis proposes a charging equalizer for hybrid energy storage systems, incorporating the Zeta converter, voltage multiplier, and multi-winding transformer. The objective is efficient charging and equalization for battery and supercapacitor strings.
Open AccessAn interleaved high step‐up DC–DC converter based on coupled‐inductor
Pages: 473-485 | First Published: 30 January 2024
This paper proposes an interleaved coupled-inductor high step-up direct current (DC)–DC converter. The proposed converter has benefits such as low voltage stress across semiconductor elements, high voltage gain, and continuous input current which makes it suitable for applications such as renewable energy sources. In addition, to reduce the negative effects of leakage inductance and recover the energy stored in it, a diode-capacitor clamp circuit is used. Moreover, a comprehensive analysis has been done on the details of the performance of the proposed converter in different operation modes. Also, its design, the voltage and current equations of all the elements, and efficiency analysis are obtained. In addition, a comprehensive comparison has been made with some similar converters.
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