Showing 1-25 of 1,750 resultsfor "Index Terms":Decrease In Width
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Finishing hot mill width models are researched and developed in this paper. Some common reasons of width change in the finishing mill are introduced. Introduced some models related to finishing hot mill strip width which are used in our finishing mill setup model system for width prediction. These models include spread during horizontal rolling, width change caused by looper, width variation by hi...Show More
Transition from multiple macro-cracking to multiple micro-cracking in cementitious composites
This paper presents an experimental study of the possibility of transition from multiple macro-cracking to multiple micro-cracking in cementitious composites. Conventional polyvinyl alcohol fiber reinforced cementitious composites normally exhibit macroscopic strain-hardening and multiple cracking after the first cracks appear. However, the individual crack width at the saturated stage is normally...Show More
Analysis of deep submicron CMOS transistor Vtlin and Idsat versus channel width
2005 Asia-Pacific Microwave Conference Proceedings
Year: 2005 | Conference Paper |
We investigate the 130nm (1.2V) and 280nm (2.5V) CMOS linear threshold voltage (Vtlin) and normalized saturation drain current (Idsat) versus channel width. Plots of Vtlin and Idsat versus channel width for different lengths are used to show the complex behavior as the channel width decreases. Both NMOS and PMOS Vtlin reach a maximum and then decrease as the width goes to W = 0.15/spl mu/m. NMOS V...Show More
The paper presents novel strategy of synchronous control of five-phase inverters in the zone of overmodulation. New time-domain-based approach for analysis and synthesis of algorithms of synchronized pulsewidth modulation (PWM) allows providing smooth three-stage transition from a linear modulation region to the ten-step control mode of five-phase systems with space-vector modulation. Simulations ...Show More
Overmodulation control of five-phase inverters with full DC-bus voltage utilization
Year: 2010 | Conference Paper |
The effect of sampling rates on the performance of a three phase PWM inverter and choice of appropriate sampling rates
2016 Biennial International Conference on Power and Energy Systems: Towards Sustainable Energy (PESTSE)
Year: 2016 | Conference Paper |
Cited by: Papers (3)
Pulse Width Modulated (PWM) inverters are most commonly used for grid interfacing in renewable energy systems and for speed control of induction motors in Variable Frequency Drives (VFD), wherein the control computations are implemented in digital signal controllers (sample-based in nature) and are highly complicated. Sampling interval is a critical parameter in PWM control algorithms, because the...Show More
Neutral-Point-Less (NPL) Multilevel Inverter with Discontinuous Pulse Width Modulations: X-type Inverter
Mikayla Benson;Xiaofeng Dong;Kangbeen Lee;Jinyeong Moon;Woongkul Lee
2023 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2023 | Conference Paper |
Cited by: Papers (2)
Advanced modulation techniques in multilevel inverters (MLIs) have been explored to increase inverter performance by reducing switching losses, voltage, and current ripple of the dc-link capacitor. Discontinuous pulse width modulation (DPWM) is able to reduce power losses by decreasing the number of switching transitions per cycle; however, it increases the neutral current, resulting in higher rip...Show More
Study of Speed Tracking of a PWM Inverter Based Induction Motor Drive
Sandeep Kumar Sunori;Abhijit Singh Bhakuni;Lalit Mohan;Pradeep Juneja
2023 4th International Conference on Smart Electronics and Communication (ICOSEC)
Year: 2023 | Conference Paper |
Cited by: Papers (1)
An induction motor drive based on inverter regulates its speed of rotation wherein the inverter plays an instrumental role. In an inverter based induction motor drive, the supply voltage and frequency is varied for controlling the motor's speed. In this drive, the inverter performs the conversion of fixed dc voltage to ac voltage having variable frequency. It also contains a speed sensor for measu...Show More
High-speed Serial Interface using PWAM Signaling Scheme
2022 19th International SoC Design Conference (ISOCC)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
This paper presents a novel PWAM signaling scheme, which improves the high-speed data transmission capability by increasing the minimum pulse width compared to the conventional PWAM scheme. In addition, versus the existing PAM, the power efficiency of the transceiver employing a novel PWAM signaling scheme is improved by the PWM modulator based on CMOS logic. The 10-Gb/s transceiver designed for a...Show More
Digital simulation of an Interline Dynamic Voltage Restorer for Voltage compensation
2011 International Conference on Computer, Communication and Electrical Technology (ICCCET)
Year: 2011 | Conference Paper |
Cited by: Papers (1)
The Dynamic Voltage Restorer (DVR) provides an advanced and economical solution for voltage sag/swell problems. The voltage-restoration process involves real-power injection into the distribution system. The Interline DVR (IDVR) proposed in this paper provides a way to compensate the voltage deviation caused in a feeder. The IDVR consists of several DVRs connected to different distribution feeders...Show More
Mitigating Dead-Time Impact in a Three-Phase Split-Source Inverter: A Simple Compensation Method
2024 23rd International Symposium INFOTEH-JAHORINA (INFOTEH)
Year: 2024 | Conference Paper |
The use of a split-source inverter (SSI) has gained popularity due to its ability to achieve boost operation without requiring additional active semiconductor switches. This results in lower costs, reduced complexity, and a smaller overall size compared to two-stage inverter topologies. The SSI is particularly well-suited for low-voltage-fed applications and offers advantages over other single-sta...Show More
Implications of Total Dose on Single-Event Transient (SET) Pulse Width Measurement Techniques
A. Balasubramanian;B. Narasimham;B. L. Bhuva;L. W. Massengill;P. H. Eaton;M. Sibley;D. Mavis
Most pulse width characterization circuits measure single-event transients (SETs) using a target circuit consisting of long inverter chains or temporal latches exposed to heavy-ions over extended periods of time. For these approaches, circuit-level effects eliminate shorter pulses due to prolonged heavy-ion exposure providing the worst case estimate of measurable transients. Simulation results in ...Show More
High-Power Tapered Photonic Crystal Lasers With Slots for Narrow Spectral Width
Xiaolong Ma;Anjin Liu;Hongwei Qu;Aiyi Qi;Xuyan Zhou;Mingjin Wang;Wanhua Zheng
IEEE Photonics Technology Letters
Cited by: Papers (5)
High-power low-divergence tapered lasers with slots in the ridge waveguide section and near the front facet are demonstrated and compared. Both devices can achieve a narrow spectral width. Tapered lasers with slots in the ridge waveguide deliver an output power of 2.15 W with a wall-plug efficiency of 43%. The maximum side mode suppression ratio (SMSR) is 28.8 dB and the vertical far-field angle i...Show More
The impact of driving capacity on single-event effect vulnerability of standard cell
Dinghong Wang;Lili Ding;Wei Chen;TanWang;Jingyan Xu;Yinhong Luo
2021 4th International Conference on Radiation Effects of Electronic Devices (ICREED)
Year: 2021 | Conference Paper |
The impacts of driving capacity on single-event effect vulnerability of 40 nm standard cells were studied. The result shows that cells with high driving capacity are inclined to have stronger single-event effect tolerance. AND gate has smaller SET cross section and transient pulse width than OR gate and D flip-flop.Show More
Study on the Slotless PM Motor Design Process Considering High Speed
Ye-Seo Lee;Ik-Sang Jang;In-Jun Yang;Kwang-Soo Kim;Won-Ho Kim
Slotless-type motors have a very constant torque without cogging torque because the windings are arranged in the gap of the stator. In addition, since there is no stator teeth structure, reduces harmonic generation, and the eddy current loss of the permanent magnet and iron loss are small, resulting in high efficiency. However, slotless motors generate large current harmonics due to their low indu...Show More
Implementing PWM fan speed control within a computer chassis power supply
Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005.
Year: 2005 | Conference Paper |
This paper discusses the implementation of pulse width modulation (PWM) fan speed control and how it can decrease energy consumption and reduce acoustics while providing wider operational speed bandwidth. In addition, this paper has described a new high performance PWM fan technology that includes a soft start circuit that monitors current and limits the current intake of a high performance fanShow More
Asymmetrical PWM technique for AC choppers
Proceedings IECON '91: 1991 International Conference on Industrial Electronics, Control and Instrumentation
Year: 1991 | Conference Paper |
An asymmetrical pulse-width modulated (APWM) control technique for an AC chopper which can improve the input power factor and suppress the harmonic contents of currents at both its input and its load sides is proposed. The ideal switching function for the proposed technique is derived and converted into the APWM pattern for practical implementation of an AC voltage regulator. By digital simulation...Show More
Effect of Buffer Width Variation on Analog Performance in a Silicon-Based n-type DG-JLT
Priyanshu Guha Thakurta;Ankita Ghosh;Chirayush Chakraborty;Atanu Kundu
2024 IEEE Calcutta Conference (CALCON)
Year: 2024 | Conference Paper |
As electronic devices continue to shrink, significant challenges arise in the form of leakage current and short channel effects. Junctionless Transistor (JLT) offers a positive alternative, with easier fabrication and superior gate control. A novel Silicon-Based n-type Double Gate Junctionless Transistor has been studied for buffer width variation in this paper. The paper presents a comprehensive ...Show More
Analysis and Modeling of the Narrow Width Effect in Gate-First HKMG nMOS Transistors
This paper analyzes and models the narrow width effect (NWE) observed in nMOS transistors fabricated using a 28-nm gate-first CMOS process. It is shown that the threshold voltage of nMOS transistors increases with decrease in channel width and this effect is enhanced at shorter gate lengths, thicker hafnium oxide (HfO2), and thicker lanthanum (La) capping layer. It is also observed that this incre...Show More
An improved drive signal exchange strategy for cascaded H-bridge topology
2018 IEEE Applied Power Electronics Conference and Exposition (APEC)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
In order to solve the inherent problem of ‘even power distribution’ or ‘dc-link capacitor voltage balance’ in the cascaded H-Bridge topology, the so called drive signal exchange scheme is always employed. However, the conventional exchange scheme ignores the problem of extra switching during the execution process which increases switching losses. The cause of switching cost increase during exchang...Show More
Multilevel Fixed Pulse Pattern Control for Medium-Voltage High-Frequency Inverter
2020 23rd International Conference on Electrical Machines and Systems (ICEMS)
Year: 2020 | Conference Paper |
Cited by: Papers (1)
To satisfy the demand for more compact medium-voltage motor drive systems, it is desirable to increase the frequency of the cascaded H-bridge inverters used in high-speed motor systems. However, in asynchronous pulse width modulation (PWM) systems, as the output frequency increases, the command voltage and triangular wave carrier frequencies get closer, making it impossible to accurately output th...Show More
Auxiliary Power Unit for Railway Vehicles Using Three-Level LLC Converter with Pulse Width Modulation Control
2019 International Symposium on Electrical and Electronics Engineering (ISEE)
Year: 2019 | Conference Paper |
Cited by: Papers (11)
This paper presents the structure of an auxiliary power unit for railway vehicles to reduce the amount of electrical energy conversion and increase efficiency. An auxiliary power unit is a key device for supplying the various control power for railway vehicles. Isolation is required as this provides the necessary power for the passenger car. Therefore, high-efficiency isolated LLC converter has be...Show More
A General Dead Time Compensation Method Based on Current Ripple Prediction and Pulse Delay Measurement for Voltage Source Inverter
2020 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2020 | Conference Paper |
Cited by: Papers (4)
This paper introduces a general dead time compensation method for voltage source inverter. By analyzing the dead time effect caused by the current freewheeling and switching delay, the precise dead time compensation can be implemented by reconstructing the actual phase current with the general current ripple prediction and pulse delay measurement. Simulation and experimental results are provided t...Show More
SVPWM Strategy With Neutral Point Voltage Balance Capability for Electrolytic Capacitorless Vienna Rectifier
Jiarui Wang;Dawei Ding;Zhaobin Huang;Bin Hu;Tan Long;Qiwei Wang;Xiangjun Zhang;Gaolin Wang;Dianguo Xu
2022 25th International Conference on Electrical Machines and Systems (ICEMS)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
The neutral point (NP) voltage fluctuation is an inherent problem of the three-level converter, which is generally solved by increasing the capacitance value. However, electrolytic capacitors will cause problems such as short lifetime and low power density. Using film capacitors on the DC side of Vienna rectifiers instead of electrolytic capacitors can solve these problems. However, the reduction ...Show More
Sub-quarter Micron Poly-Si Etching With Positive Pulse Biasing Technique
Proceedings of 1st International Symposium on Plasma Process-Induced Damage
Year: 1996 | Conference Paper |
Cited by: Patents (1)
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