Simulating the Electrical Characteristics of Solar Panels Based on Practical Single-Diode Equivalent Circuit Model: Analyzing the Influence of Environmental Parameters on Output Power

2018 ◽  
pp. 67-74
Author(s):  
Syeda Adila Afghan ◽  
Husam Almusawi ◽  
Husi Géza
Keyword(s):  
Equivalent Circuit ◽  
Output Power ◽  
Equivalent Circuit Model ◽  
Environmental Parameters ◽  
Circuit Model ◽  
Electrical Characteristics ◽  
Solar Panels

scholarly journals Improved Interface Circuit for Enhancing the Power Output of a Vibration-Threshold-Triggered Piezoelectric Energy Harvester

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3830
Author(s):  
Jiqiang Liu ◽  
Junjie Yang ◽  
Ruofeng Han ◽  
Qisheng He ◽  
Dacheng Xu ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Piezoelectric Material ◽  
Output Power ◽  
Energy Harvester ◽  
Equivalent Circuit Model ◽  
Stage Structure ◽  
Circuit Model ◽  
Interface Circuit ◽  
Piezoelectric Energy ◽  
Vibration Threshold

The vibration-threshold-triggered piezoelectric energy harvester is a new type of piezoelectric energy harvester with a two-stage structure, which can generate electricity in a low frequency environment and recognize vibration intensity at the same time. In this study, a theoretical model of a vibration-threshold-triggered energy harvester was examined, and an equivalent circuit model of the energy harvester was obtained. Then, an interface circuit was proposed that can significantly improve the output power of the energy harvester. The interface circuit achieved impedance matching with the piezoelectric material to maximize the energy collected from the energy harvester. First, we calculated and analyzed the impedance characteristics of the energy harvester, based on the equivalent circuit model. It was found that because the piezoelectric material is in resonance as the energy harvester is in operation, the corresponding impedance is almost resistance. Therefore, a resistance-matching strategy was proposed. Last, we proposed an interface circuit with adjustable input impedance to achieve resistance matching. The experimental results show that the proposed interface circuit can increase the output power of the energy harvester by 48.1–55.7% over that achieved with the standard interface circuit.

scholarly journals Gallium Nitride Electrical Characteristics Extraction and Uniformity Sorting

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Shyr-Long Jeng ◽  
Chih-Chiang Wu ◽  
Wei-Hua Chieng
Keyword(s):  
Gallium Nitride ◽  
Equivalent Circuit ◽  
Field Effect Transistors ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Electrical Characteristics ◽  
Electrical Measurements ◽  
Power Transistors ◽  
High Power Output ◽  
The Difference

This study examined the output electrical characteristics—current-voltage (I-V) output, threshold voltage, and parasitic capacitance—of novel gallium nitride (GaN) power transistors. Experimental measurements revealed that both enhanced- and depletion-mode GaN field-effect transistors (FETs) containing different components of identical specifications yielded varied turn-off impedance; hence, the FET quality was inconsistent. Establishing standardized electrical measurements can provide necessary information for designers, and measuring transistor electrical characteristics establishes its equivalent-circuit model for circuit simulations. Moreover, high power output requires multiple parallel power transistors, and sorting the difference between similar electrical characteristics is critical in a power system. An isolated gate driver detection method is proposed for sorting the uniformity from the option of the turn-off characteristic. In addition, an equivalent-circuit model for GaN FETs is established on the basis of the measured electrical characteristics and verified experimentally.

Investigation of Output Power and Efficiency of Wound-Rotor Brushless Doubly-Fed Machine

2012 ◽  
Vol 516-517 ◽  
pp. 1604-1609
Author(s):  
Jun Zhang ◽  
Xue Fan Wang
Keyword(s):  
Equivalent Circuit ◽  
Output Power ◽  
Power Distribution ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Maximum Output ◽  
The Core ◽  
Doubly Fed ◽  
Doubly Fed Machine ◽  
The Relationship

Brushless Doubly-fed Machine (BDFM) is a new type of the induction machine, which has wide application in the fields of variable-speed generator and drive systems. The key factor affecting its performance is the rotor structure. In this paper, taking wound-rotor BDFM for instance, firstly, according to the relationship between the equivalent circuit parameters of the BDFM, the core equivalent circuit model of the BDFM has been derived. Secondly, based on the core equivalent circuit model and the constraints of electromagnetic load, the power distribution between the power and control windings and the constraint condition of maximum output of active power has been obtained. Thirdly, according to the simplified model of the equivalent circuit, the copper loss and the relationship between the output power and efficiency of the machine have been investigated. Finally, the anlysis results are verified by the experimental data.

scholarly journals A Novel Simulation Method for Analyzing Diode Electrical Characteristics Based on Neural Networks

Electronics ◽  
2021 ◽  
Vol 10 (19) ◽  
pp. 2337
Author(s):  
Tao Liu ◽  
Le Xu ◽  
Yao He ◽  
Han Wu ◽  
Yong Yang ◽  
...  
Keyword(s):  
Neural Network ◽  
Equivalent Circuit ◽  
Physical Model ◽  
High Frequency ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Training Data ◽  
Electrical Characteristics ◽  
Large Injection ◽  
Equivalent Circuit Method

Based on the equivalent circuit model and physical model, a new method for analyzing diode electrical characteristics based on a neural network model is proposed in this paper. Although the equivalent circuit model is widely used, it cannot effectively reflect the working state of diode circuits under the conditions of large injection and high frequency. The analysis method based on physical models developed in recent years can effectively resolve the above shortcomings, but it faces the problem of a low simulation efficiency. Therefore, the physical model method based on neural network acceleration is used to improve the traditional, equivalent circuit model. The results obtained from the equivalent circuit model and the physical model are analyzed using the finite-difference time-domain method. The diode model based on a neural network is fitted with training data obtained from the results of the physical model, then it is summarized into a voltage–current equation and used to improve the traditional, equivalent circuit method. In this way, the improved equivalent circuit method can be used to analyze the working state of a diode circuit under large injection and high frequency conditions. The effectiveness of the proposed model is verified by some examples.

Process dependent electrical characteristics and equivalent circuit model of sol-gel based PZT capacitors

1992 ◽  
Vol 1 (2-4) ◽  
pp. 269-291 ◽  
Author(s):  
Takashi Mihara ◽  
Hitoshi Watanabe ◽  
Hiroyuki Yoshimori ◽  
C. A. Paz De Araujo ◽  
B. Melnick ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Sol Gel ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Electrical Characteristics

An Equivalent Circuit Model for Vertical Comb Drive MEMS Optical Scanner Controlled by Pulse Width Modulation

2012 ◽  
Vol 132 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Satoshi Maruyama ◽  
Muneki Nakada ◽  
Makoto Mita ◽  
Takuya Takahashi ◽  
Hiroyuki Fujita ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Comb Drive ◽  
Optical Scanner

scholarly journals A Novel, Improved Equivalent Circuit Model for Double-Sided Linear Induction Motor

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1644
Author(s):  
Qian Zhang ◽  
Huijuan Liu ◽  
Tengfei Song ◽  
Zhenyang Zhang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Equivalent Circuit ◽  
Skin Effect ◽  
Equivalent Circuit Model ◽  
Element Model ◽  
Circuit Model ◽  
End Effects ◽  
3D Finite Element ◽  
Linear Induction

A novel, improved equivalent circuit model of double-sided linear induction motors (DLIMs) is proposed, which takes the skin effect and the nonzero leakage reactance of the secondary, longitudinal, and transverse end effects into consideration. Firstly, the traditional equivalent circuit with longitudinal and transverse end effects are briefly reviewed. Additionally, the correction coefficients for longitudinal and transverse end effects derived by one-dimensional analysis models are given. Secondly, correction factors for skin effect, which reflects the inhomogeneous air gap magnetic field vertically, and the secondary leakage reactance are derived by the quasi-two-dimensional analysis model. Then, the proposed equivalent circuit is presented, and the excitation reactance and secondary resistance are modified by the correction coefficients derived from the three analytical models. Finally, a three-dimensional (3D) finite element model is used to verify the proposed equivalent circuit model under varying air gap width and frequency, and the results are also compared with that of the traditional equivalent circuit models. The calculated thrust characteristics by the proposed equivalent circuit and 3D finite element model are experimentally validated under a constant voltage–frequency drive.

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