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Zhou, Yongqin,Hu, Bo,Wang, Hang,Jin, Ningzhi,Zhou, Meilan The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.2
In this paper, a flux linkage model based on four magnetization curves fitting is proposed for three-phase 12/8 switched reluctance motor (SRM), with the analysis of the basic principle of flux detection method and function analysis method. In the model, the single value function mapping relationship between position angle and flux is established, which can achieve a direct estimation of rotor position. The realization scheme of SRM indirect position detection system is presented. It is proved by simulation and experiment that the proposed scheme is suitable for rotor position detection of SRM, and has high accuracy of position estimation.
Zhou Yongqin,Huang Ce,Chen Junjie,Shi Guijun,Zhou Meilan 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.6
Due to synchronous rectification based on Phase-shift full bridge converter is difficult to work in a state of soft switch, to solve this problem, this paper sets out an control approach of synchronous rectification based on the ZVZCS phase-shifted full-bridge, and the drive signal of synchronous rectification side uses leading-leg drive waveform after a certain time delay and applies the resonant principle in the switching process,not only keeping full bridge ZVZCS soft switching but also realizing MOSFET of the synchronous rectification ZVS. The simulation of saber and experimental research show that the converter has a good performance.
A Non-isolated High-gain DC/DC Converter Suitable for Fuel Cell Vehicles
Zhou Meilan,Fu Jun,Wu Xiaogang,Yang Mingliang,Zhang Zhigang 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.1
The output voltage of the fuel cell is relatively low, which is usually lower than the DC bus voltage in the power system of electric vehicles. At the same time, the fuel cell output current and output voltage are signifi cantly inversely proportional to each other, as the output current increases, the output voltage drops signifi cantly. For the purpose of adapting the unstable output voltage characteristics., this paper proposes a non-isolated converter structure. The proposed converter has certain advantages in electrical performance, high voltage gain, low component voltage stress, wide input voltage range, and the structure that the output and input are common ground. In this paper, the working principle is analyzed. The closed-loop control system is designed by building a small-signal model. And a prototype is designed while calculating the device parameters. The experimental results show that the input range of the prototype is 25–60 V. When the rated output voltage is 200 V, the boost ratio can reach 8 times, which meets the requirements of fuel cell vehicles for DC/DC converters.
Yongqin Zhou,Bo Hu,Hang Wang,Ningzhi Jin,Meilan Zhou 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.2
In this paper, a flux linkage model based on four magnetization curves fitting is proposed for three-phase 12/8 switched reluctance motor (SRM), with the analysis of the basic principle of flux detection method and function analysis method. In the model, the single value function mapping relationship between position angle and flux is established, which can achieve a direct estimation of rotor position. The realization scheme of SRM indirect position detection system is presented. It is proved by simulation and experiment that the proposed scheme is suitable for rotor position detection of SRM, and has high accuracy of position estimation.
Meng Dawei,Zhang Yu,Zhou Meilan,Tian Xiaochen 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.12
Aiming at short endurance mileage for electric vehicle, effected vehicle life because of battery excessive charging and discharging, the control method is put forward making use of super-capacitor to recovery regenerative braking energy, Hafei-Saibao electric vehicle is as example,seven kinds of topology with composite energy-single load are researched on power consumption, and the force condition of front and rear wheels is analyzed for front driving vehicle,the required energy of front wheel is detected to develop control strategy. On the basis of experimental data, co-simulation is achieved in the vehicle special simulation software, the experimental results show endurance mileage of improved car has increased by 34%, endurance mileage after being charged is 243 kilometer, the per hundred kilometers consumption has been decreased to 7.5 kW.h from 12 kW.h, the electrical consumption has been decreased by 37.5%, and the full load characteristics is optimized.
Management Strategy Based on Genetic Algorithm Optimization for PHEV
Zhang Yu,Meng Dawei,Zhou Meilan,Lu Dengke 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.11
Aiming at the refitted HAFEI hybrid electric vehicle (HEV), fuzzy logic energy management strategy is constructed based on genetic algorithm optimization. The difference value D between the total require torque Tr of path and the target required torque Te of engine, the intelligence quotient value with Tr is selected as the first input variable of fuzzy controller, the SOC of battery as the second input variable; torque control coefficient C is selected as output variable, meanwhile two input variable membership function is improved on genetic algorithm. To further evaluate the control strategy, dynamic programming control strategy is used as standard; the simulation experiments show that every kind of gas emission is obviously reduced by 12% to 47% in fuzzy control strategy B based on genetic algorithm optimization compared to strategy A based on determinacy rules. Compared to dynamic programming, fuel economy in strategy A is only 45.09% of standard value which is not ideal, the utilization of fuel is low and the gas emission is serious, while in strategy B fuel economy is 78.89% of standard value and effect is improved obviously.