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53rd Annual Meeting of the IEEE-Industry-Applications-Society (IAS)

作者： Lai, Yen-Shin Hsu, Yi-Hsiu Natl Taipei Univ Technol Ctr Power Elect Taipei 10608 Taiwan

ISBN: (纸本)9781538645369

The main theme of this paper is to present the design and implementation of dual servo motor drives control using single micro controller unit to achieve either separate control and synchronous control of motor drives. The advantages of dual motor drives control using the same MCU including easy to achieve synchronous control in between. The delay contributed by calculation, filter and PWM generation, etc. is considered for controller design. Two servo motors, one is with absolute encoder and the other one is with incremental encoder, are used for experimental test. Renesas MCU, RZ/T1, is used as the controller for the implementation. Experimental results show the bandwidth for position loop of servo drives with switching frequency is improved and synchronous control between two motor drives can be easily achieved.

关键词： Servo Drives Micro Controller Unit pulse-width modulation

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Research of the Influence of Input Voltage Deviations on the pulse-width Converter With Microprocessor Control System 3

Research of the Influence of Input Voltage Deviations on the...

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3rd IEEE International Conference on Intelligent Energy and Power Systems (IEPS)

作者： Kipenskyi, Andrii V. Korol, Ievgen I. Babkova, Nadiia V. NTU KhPI Dept Phys & Biomed Elect Kharkov Ukraine NTU KhPI Dept Intelligent Comp Syst Kharkov Ukraine

ISBN: (纸本)9781538695456

In this work, studies of the input voltage changes effect on the operation of a pulse-width constant voltage converter were carried out. The ways of reducing this influence with the help of microprocessor control systems combining deviation control with input disturbance control are analyzed. With the help of the mathematical model it is shown that under certain conditions of forming the control action, the input disturbances can be successfully compensated.

关键词： pulse-width modulation microprocessor control system input disturbances feedback on deviation feedback on input disturbance mathematical model

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A Harmonic Rejection Downconverter with a GHz PWM-Based LO 13

A Harmonic Rejection Downconverter with a GHz PWM-Based LO

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13th IEEE Dallas Circuits and Systems Conference (DCAS)

作者： Kang, Heechai Gharpurey, Ranjit Univ Texas Austin Austin TX 78712 USA

ISBN: (纸本)9781538692622

A harmonic rejection downconverter that employs a pulse-width modulated local oscillator (PWM-LO) signal is proposed. The approach employs current-mode operation, and significantly improves performance for narrow pulse-widths, which allows for high-frequency operation. The use of an input transconductor-cell with signal-path switches decreases the sensitivity of the harmonic rejection ratio (HRR) to harmonic power level. The design is simulated in a 65-nm CMOS technology, and shows HRRs of nearly 60-70 dB for the 3(rd) and 5(th) harmonics, with a 1 GHz LO, over a range of harmonic power levels, and rise and fall times of the PWM waveform.

关键词： Harmonic rejection downconverter pulse-width modulation local oscillator

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Active Ageing Control of Winding Insulation in High Frequency Electric Drives 10

Active Ageing Control of Winding Insulation in High Frequenc...

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10th IEEE Annual Energy Conversion Congress and Exposition (ECCE)

作者： Leuzzi, Riccardo Monopoli, Vito Giuseppe Cupertino, Francesco Zanchetta, Pericle Politecn Bari Dept Elect & Informat Engn Bari Italy Univ Nottingham Dept Elect & Elect Engn Nottingham England

ISBN: (纸本)9781479973125

The objective of this work is to present a control technique for power converters capable of slowing down the electrical ageing phenomena affecting the winding insulation of high-speed electrical machines. Such machines are profitably used in aeronautical or electric vehicle applications since they allow a drastic reduction of encumbrance and weight. Obviously, these machines require high-frequency supply voltage and hence converters based on wide band gap devices are the most suitable. Notwithstanding, issues related to high-frequency operation of SiC or GaN MOSFETs are continuously arising, such as the increased electrical stress of the winding insulation due to more severe over-voltages at the motor terminals. These downsides represent a major concern for some applications where system reliability is of the utmost importance like in the aeronautical or automotive fields. This paper provides a detailed description of the proposed control technique and shows the relevant advantages through simulation and experimental results.

关键词： active ageing control electrical insulation ageing high-speed AC drives high-frequency converters pulse-width modulation

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Characterization of Digital IC for Sub-Nanosecond Dead-Time Adjustment Used in Synchronous DC-DC Converters

Characterization of Digital IC for Sub-Nanosecond Dead-Time ...

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Conference on New Generation of CAS (NGCAS)

作者： Bacmaga, Josip Blecic, Raul Voaden, Roger Baric, Adrijan Univ Zagreb Fac Elect Engn & Comp Unska 3 Zagreb 10000 Croatia Univ Nantes Ecole Polytech Elect & Technol Numer Nantes France

ISBN: (纸本)9781538676813

A digital integrated circuit for sub-nanosecond dead-time adjustment is characterized by time-domain measurements. The dead-time adjustment circuit (DTAC) generates two complementary signals for the switches used in synchronous DC-DC converter application. The control signals are generated from a PWM signal that is applied from a signal generator to the input of the DTAC. The circuit is based on a tapped delay-chain architecture and it is designed for frequencies up to 10 MHz. The DTAC is designed and fabricated in a 180-nm CMOS process. The characterization setup is shown and operating principle of the designed circuit is described. The generated dead times are measured for the whole range of the achievable discrete time-delay values at different switching frequencies.

关键词： CMOS pulse-width modulation synchronous switching converters tapped delay-chain

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Single Phase Five level Inverter for Solar-PV Applications 2

Single Phase Five level Inverter for Solar-PV Applications

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2nd International Conference on Intelligent Circuits and Systems (ICICS)

作者： Kumar, Prakash Thanki, Dip Vinod Kour, Maneet Singh, Harnek Lovely Profess Univ Sch Elect & Elect Engn Jalandhar 144411 India

ISBN: (纸本)9781538664834

This paper deals with five level inverter topology for solar-PV generation in standalone applications. Desired voltage has been obtained by regulated pulse width modulated (PWM) gating signal fed to gate of bidirectional inverter switches. Perturb and Observe (P&O) based maximum power point tracking (MPPT) tracks maximum generated power. DC-DC converter has been established to regulate power to rated values. The results has been established and verified in MATLAB/Simulink platform.

关键词： five level inverter maximum power point tracking Solar-PV pulse-width modulation

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Analysis of Influence of Frequency Converters with Active Rectifiers on the Power Quality in Internal Power Supply Systems of Industrial Enterprises

Analysis of Influence of Frequency Converters with Active Re...

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International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM)

作者： Nikolaev, A. A. Gilemov, I. G. Denisevich, A. S. Nosov Magnitogorsk State Univ Automated Elect Drive & Mechatron Dept Magnitogorsk Russia

ISBN: (纸本)9781538643075

This paper studies power factors in the internal power supply system of metallurgical plant frequency converters with active rectifiers. A simulation model of the three-level twelve-pulse active rectifiers has been developed and implemented in the Matlab/Simulink environment for investigation purposes. Four different pulse-width modulation algorithms used at the operated active rectifiers and the DC-link voltage control system have been realized. In addition, the harmonic composition of consumed current and network voltage at the active rectifier connection point have been analyzed. The compliance of the harmonics' level with the power quality standard (GOST 32144-2013) has been verified. The conclusions about the efficiency of existing pulse-width modulation algorithms have been made.

关键词： active rectifier power quality frequency converter pulse-width modulation current harmonic composition

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Combining Illumination Dimming Based on pulse-width modulation With Visible-Light Communications Based on Discrete Multitone

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JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING 2011年第1期3卷 56-65页

作者： Ntogari, G. Kamalakis, T. Walewski, J. W. Sphicopoulos, T. Univ Athens Dept Informat & Telecommun GR-10679 Athens Greece Harokopio Univ Dept Informat & Telemat Athens 17671 GR Greece Siemens AG Corp Technol Commun Technol D-8000 Munich Germany

In the field of indoor wireless networks, visible-light communications is garnering increasing attention. One of the type of emitters used in this technology is white light-emitting diodes, which can synergistically provide both illumination and data transmission. Discrete multitone modulation is attractive for visible-light communications. One of the issues to be addressed in these synergetic use cases is how to incorporate light dimming while not corrupting the communication link. In this paper, the performance of a visible-light communication system combining pulse-width modulation for dimming and discrete multitone for data transmission was investigated. Performance indicators were addressed, i.e., the signal-to-interference ratio due to dimming and the achievable bit-error ratio in the absence of additional noise. By aid of simulations it was shown that practical communication is only feasible when the line rate of the dimming modulation is at least twice the frequency assigned to the largest multitone subcarrier frequency. The results demonstrate that under this constraint and when using a suitably modified demodulation scheme, dimming does not influence the data transmission.

关键词： Visible-light communications White light-emitting diodes Dimming pulse-width modulation Discrete multitone

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Device-Level Photonic Memories and Logic Applications Using Phase-Change Materials

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ADVANCED MATERIALS 2018年第32期30卷 1802435-1802435页

作者： Cheng, Zengguang Rios, Carlos Youngblood, Nathan Wright, C. David Pernice, Wolfram H. P. Bhaskaran, Harish Univ Oxford Dept Mat Pk Rd Oxford OX1 3PH England MIT Dept Mat Sci & Engn Cambridge MA 02139 USA Univ Exeter Dept Engn Exeter EX4 4QF Devon England Univ Munster Inst Phys Heisenbergstr 11 D-48149 Munster Germany

Inspired by the great success of fiber optics in ultrafast data transmission, photonic computing is being extensively studied as an alternative to replace or hybridize electronic computers, which are reaching speed and bandwidth limitations. Mimicking and implementing basic computing elements on photonic devices is a first and essential step toward all-optical computers. Here, an optical pulse-width modulation (PWM) switching of phase-change materials on an integrated waveguide is developed, which allows practical implementation of photonic memories and logic devices. It is established that PWM with low peak power is very effective for recrystallization of phase-change materials, in terms of both energy efficiency and process control. Using this understanding, multilevel photonic memories with complete random accessibility are then implemented. Finally, programmable optical logic devices are demonstrated conceptually and experimentally, with logic OR and NAND achieved on just a single integrated photonic phase-change cell. This study provides a practical and elegant technique to optically program photonic phase-change devices for computing applications.

关键词： phase-change materials photonic computing photonic logic photonic memories pulse-width modulation

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METHOD FOR ANALYSIS OF THE GLOBAL STABILITY OF DYNAMIC SYSTEMS WITH pulse-width modulation THAT ARE PRESENTED IN THE FORM OF POINCARE MAPPINGS

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RUSSIAN PHYSICS JOURNAL 2011年第6期54卷 673-678页

作者： Kobzev, G. A. Tanovitski, Yu N. Savin, D. A. Turan, V. V. Tomsk State Univ Control Syst & Radioelect Tomsk Russia

A method for analysis of the global stability of dynamic systems with pulse-width modulation that are presented in the form of Poincare mappings is suggested. The method has enhanced efficiency from the viewpoint of t... 详细信息

关键词： global stability pulse-width modulation

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