Theoretical analysis of magnetic sensor output voltage

2011 ◽  
Vol 323 (12) ◽  
pp. 1667-1670 ◽  
Author(s):  
Haishun Liu ◽  
Chaochao Dun ◽  
Linming Dou ◽  
Weiming Yang
Keyword(s):  
Theoretical Analysis ◽  
Output Voltage ◽  
Magnetic Sensor ◽  
Sensor Output

scholarly journals Novel Step-Up Topologies of Zigzag Autotransformer

Electronics ◽  
2021 ◽  
Vol 10 (24) ◽  
pp. 3071
Author(s):  
Jiarong Wang ◽  
Bo He
Keyword(s):  
Theoretical Analysis ◽  
Output Voltage ◽  
Optimal Topology ◽  
Transformation Ratio ◽  
Simulation Parameters ◽  
The Relationship ◽  
Equivalent Capacity

Zigzag autotransformer is widely used in multi-pulse rectifier system. However, the traditional zigzag autotransformer does not have the step-up function. Meanwhile, by improving the zigzag autotransformer structure, the output voltage can be increased without additional auxiliary components. Therefore, based on the 12 pulse rectifier system, this paper analyzes and designs three zigzag autotransformer step-up topologies, establishes the corresponding mathematical topology, studies the relationship between the transformation ratio and system main parameters, and deduces the step-up range of the three topologies. When the transformation ratio is greater than or equal to 1.0353 and less than 2.0705 and when the transformation ratio is greater than or equal to 2.0705, the equivalent capacity of the three topologies are compared. Based on the comparison, the optimal topology is obtained in different cases. Finally, according to the theoretical analysis, the simulation parameters are set, the simulation circuit is built, and the results are analyzed combined with corresponding mathematical topologies.

scholarly journals A Renewable Energy Fed Non-Isolated Inverse Output Voltage DC-DC Converter with Broad Range of Conversion

2019 ◽  
Vol 8 (5S3) ◽  
pp. 160-163
Keyword(s):  
Renewable Energy ◽  
Theoretical Analysis ◽  
Output Voltage ◽  
Conversion Ratio ◽  
Negative Voltage ◽  
Wide Range ◽  
Negative Output

Renewable Energy fed non-isolated negative output Converter with dc-dc conversion is proposed which employed for various applications. In industrial purposes only few converters are available for wide conversion ratio, the proposed design has come up with wide range negative voltage load applications. The proposed converter is analyzed and design for continuous condition mode. For verification of theoretical analysis, the proposed converter is simulated using PSIM 9.0.

Research on the Electrical Model of a Capacitive Soil Moisture Sensor

2012 ◽  
Vol 260-261 ◽  
pp. 917-925 ◽  
Author(s):  
Yan Xu ◽  
Wei Dong Yi ◽  
Ko Wen Jwo
Keyword(s):  
Experimental Data ◽  
Soil Moisture ◽  
Double Layer ◽  
Relative Permittivity ◽  
Electric Double Layer ◽  
Output Voltage ◽  
Sensor Output ◽  
Electrical Model ◽  
Moisture Sensor ◽  
Soil Moisture Sensor

The electrical model of a capacitive soil moisture sensor is considered in this paper. In the new model established, the contact resistor and contact capacitance are taken into account. It is pointed out that the electric double layer causes the formation of the contact resistor and contact capacitance. The electrical properties of the electric double layer are the effect of both physical electricity and electrochemistry, so the relationship between the contact capacitance and the soil relative permittivity does not follow the formula of the parallel plate capacitor. Based upon the diffuse electric double layer model, this paper successfully derives the formula of the contact capacitor , whose coefficients are determined by MATLAB simulation based on experimental data, and the soil relative permittivity. Besides, this paper has established the sensor-output-voltage-Vo -soil-moisture-θ curve and compared it to that derived from the model without considering the electric double layer. It is demonstrated that the correlation coefficient between the curve derived from the model this paper established and the experimental data is 0.9997, more accurately describing the relation between the sensor output voltage Vo and soil moisture θ.

Modeling of Lambda Sensor Output With Exhaust Gas Mixtures From Natural Gas-Fueled Engines

2011 ◽  
Author(s):  
Mohamed Toema ◽  
Kirby S. Chapman
Keyword(s):  
Natural Gas ◽  
Output Voltage ◽  
Catalytic Converter ◽  
Catalytic Reactions ◽  
Exhaust Gas ◽  
Sensor Output ◽  
Physical Processes ◽  
Sensor Performance ◽  
Lambda Sensor ◽  
Gas Fueled

The increasingly strict emission regulations may require implementing Non-Selective Catalytic Reduction (NSCR) system as a promising emission control technology for stationary rich burn spark ignition engines. Many recent investigations used NSCR systems for stationary natural gas fueled engines showed that NSCR systems were unable to consistently control the emissions level below the compliance limits. Modeling of NSCR components to better understand, and then exploit, the underlying physical processes that occur in the lambda sensor and the catalyst media is now considered an essential step toward the required NSCR system performance. This paper presents the work done to date on a modeling of lambda sensor that provides feedback to the air-to-fuel controller. Several recent experimental studies indicate that the voltage signal from the lambda sensor may not be interpreted correctly because of the physical nature in the way the sensor senses the exhaust gas concentration. Correct interpretation of the sensor output signal is necessary to achieve consistently low emissions level. The goal of this modeling study is to improve the understanding of the physical processes that occur within the sensor, investigate the cross-sensitivity of various exhaust gas species on the sensor performance, and finally this model serves as a tool to improve NSCR control strategies. This model simulates the output from a planar switch type lambda sensor. The model consists of three modules. The first module models the multi-component mass transport through the sensor protective layer. Diffusion fluxes are calculated using the Maxwell-Stefan equation. The second module includes all the surface catalytic reactions that take place on the sensor platinum electrodes. All kinetic reactions are modeled based on the Langmuir-Hinshelwood kinetic mechanism. The model incorporates for the first time methane catalytic reactions on the sensor platinum electrode. The third module is responsible for simulating the reactions that occur on the electrolyte material and determine the sensor output voltage. The model results are validated using field test data obtained from a mapping study of a natural gas-fueled engine equipped with NSCR system. The data showed that the lambda sensor output voltage is influenced by the reducing species concentration, such as carbon monoxide (CO) and hydrogen (H2). The results from the developed model and the experimental data showed strong correlations between CO and H2 with the sensor output voltage within the lambda operating range between 0.994 to 1.007 (catalytic converter operating window). This model also showed that methane does not significantly influence the lambda sensor performance compared to the effect of CO and H2.

The perceptually-inspired model of tactile texture sensor based on the inverse-magnetostrictive effect

2019 ◽  
Vol 46 (3) ◽  
pp. 345-350
Author(s):  
Lili Wan ◽  
Bowen Wang ◽  
Xiaodong Wang ◽  
Wenmei Huang ◽  
Ling Weng
Keyword(s):  
Surface Texture ◽  
Output Voltage ◽  
Design Methodology ◽  
Surface Microstructure ◽  
Sensor Output ◽  
Texture Characteristic ◽  
Content Type ◽  
Microstructure Characteristics ◽  
Texture Properties ◽  
Output Characteristics

Purpose The purpose of this study is to develop an output model to extract surface microstructure characteristics of different objects, so as to predict the response of the output voltage obtained from tactile texture sensor. Design/methodology/approach The model is based on the consideration of the inverse-magnetostrictive effect, the flexure mode, the linear constitutive equations and the strain principle. Findings This research predicts and investigates the effect of the texture properties on the tactile texture sensor output characteristics. Originality/value The surface texture characteristic is regarded to be important information to evaluate and recognize the object.

A Novel Four Switch Infinite Level Inverter

2020 ◽  
Vol 29 (12) ◽  
pp. 2050193 ◽  
Author(s):  
K. T. Ajmal ◽  
K. Muhammedali Shafeeque ◽  
B. Jayanand
Keyword(s):  
Steady State ◽  
Theoretical Analysis ◽  
Output Voltage ◽  
Duty Ratio ◽  
Switching Frequency ◽  
Voltage Level ◽  
Steady State Analysis ◽  
Analysis And Design ◽  
Multilevel Inverters ◽  
Very High

A novel Four Switch Infinite Level Inverter (FSILI) is proposed in this paper. In conventional multilevel inverters, as the number of levels increases the output voltage becomes more sinusoidal. Unlike conventional multilevel topologies, the output voltage level in the proposed topology depends upon the switching frequency. Since the switching frequency is very high, the output voltage level approaches infinity, thus the name Infinite Level Inverter. Proposed topology requires only one inductor and capacitor reducing the size, weight and thus cost of the overall system. Inherent buck operation is happening in the proposed topology with a sine varying duty ratio PWM control. Steady-state analysis and design of the inverter are carried out. The proposed topology is simulated using Matlab/Simulink to evaluate the theoretical analysis and operation. A hardware prototype is also developed to validate the operation of proposed FSILI.

The Error Analysis of Micro-Flow Self-Sensing Actuator

2015 ◽  
Vol 645-646 ◽  
pp. 972-979
Author(s):  
Yan Bo Wei ◽  
Li Ping Shi ◽  
Hai Zhou
Keyword(s):  
Theoretical Analysis ◽  
Flow Injection ◽  
Piezoelectric Ceramic ◽  
Output Voltage ◽  
Piezoelectric Effect ◽  
External Factors ◽  
Output Displacement ◽  
Nonlinear Error ◽  
Direct Piezoelectric Effect ◽  
Micro Flow

In this article the micro flow self-sensing actuator has carried on the theoretical analysis and experimental research. Using output micro-displacement generated by the first inverse piezoelectric effect to realize cell micro flow injection, using output voltage generated by secondary direct piezoelectric effect of piezoelectric ceramic to self-sensing the output displacement in the process of the micro flow injection. The experimental results show that the micro-displacement of micro-flow self-sensing actuator has nonlinear error, error is 5.03%. The error between measured micro-displacement and self-sensing micro-displacement is 63.13%. In this paper, the error causes analysis of micro-flow self-sensing actuator is from non-linearity and hysteresis, external factors, it lay the foundation for the further study of micro-flow self-sensing actuator.

scholarly journals A Novel Neutral Point Clamped Full-Bridge Topology for Transformerless Photovoltaic Grid-Connected Inverters

2017 ◽  
Vol 7 (2) ◽  
pp. 1460-1463
Author(s):  
M. Pakdel ◽  
S. Jalilzadeh
Keyword(s):  
Theoretical Analysis ◽  
Leakage Current ◽  
Output Voltage ◽  
Neutral Point ◽  
Simulation Studies ◽  
Power Losses ◽  
Lower Power ◽  
Common Mode Voltage ◽  
The Common ◽  
Bus Voltage

This paper presents a novel neutral point clamped full-bridge topology for transformerless photovoltaic grid-tied inverters. Transformerless grid-connected inverters have been used widely in recent years since they offer higher efficiency and lower costs. Ground leakage current suppression is the main issue which should be considered carefully in transformerless photovoltaic grid-connected inverters. Among different methods used to decline ground leakage current, neutral point clamped (NPC) topologies are considered more useful and effective. In NPC topologies, the short-circuited output voltage at the freewheeling period is clamped to the middle of the DC bus voltage. Therefore, the common-mode voltage (CM) will be constant at the whole switching period. Various NPC topologies such as H6 [1], HB-ZVR [2], oH5 [3], and PN-NPC [4] have been proposed. In this paper, a novel NPC topology is proposed which has lower power losses and higher efficiency over previous topologies. Furthermore, the proposed NPC topology exhibits a similar ground leakage current with the PN-NPC topology. The proposed NPC topology is analyzed theoretically using simulation studies and an experimental prototype is provided to verify theoretical analysis and simulation studies.

scholarly journals Multilevel neutral point clamped/H-bridge inverters with sinusoidal pulse width modulation

2021 ◽  
Author(s):  
Arifur Rahman Shohel
Keyword(s):  
Computer Simulation ◽  
Theoretical Analysis ◽  
High Power ◽  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Neutral Point ◽  
Medium Voltage ◽  
Modulation Technique ◽  
Sinusoidal Pulse Width Modulation

This project focuses on the topology of multilevel neutral point clamped (NPC)/H-bridge inverters and their modified modulation technique for high-power (megawatts) medium voltage (typically 6000 v) applications. A sinusodial pulse width in-phase disposition modulation is proposed for five-level NPC/H-bridge inverters. The inverter achieves good harmonic performance and low dv/dt in its output voltage waveforms in comparison to the conventional three-level NPC inverter. A seven-level NPC/H-bridge topology and its sinusodial pulse width in-phase disposition modulation are also proposed and investigated, which has better performance than the five-level inverters. Theoretical analysis and computer simulation are carried out for the proposed inverter topologies and algorithms. The output voltage waveforms and harmonic performance are verified by experiments on a five-level NPC/H-bridge inverters.

Sign in / Sign up

Export Citation Format

Share Document