EMI in Modern AC Motor Drive Systems

Total Page:16

File Type:pdf, Size:1020Kb

EMI in Modern AC Motor Drive Systems in that year, where he was engaged in the research and development he joined the Department of Electrical and Electronic Engineering, Oita of communication network architectures and communication switch- University, and is currently an Associate Professor of the same Univer- ing software. He joined the Division of Medical Informatics, Shi- sity. His research interests have been on electromagnetic direct/inverse mane University Hospital, in 2004. He moved to the Department of scattering and FDTD analysis of the electromagnetic environment. Dr. Medical Informatics, Shimane University School of Medicine, in Kudou is a member of the IEICE of Japan, the IEE of Japan and the 2005. His research interests include information processing systems Japanese Society of Medical and Biomedical Engineering. in hospitals as well as computational learning theory and its appli- cation. He is a member of the Institute of Electronics, Information Takashi Kano was born in Tokyo, Japan, in and Communication Engineers of Japan, the Japanese Society for 1949. He received his B.Eng. degrees from Artificial Intelligence, the Japan Society for Health Care Manage- Sophia University, Tokyo, Japan, in 1973. He ment, and the Japanese Society for Clinical Pathway. received his Ph.D. degree from Toa University, Yamaguchi, Japan, in 2004. Since 1973, he Takato Kudou was born in Oita, Japan, in has worked at the Department of Medical Engi- 1963. He received his B.Eng., M.Eng. and D. neering Service in Mitsui Memorial Hospital for Eng. degrees in communication engineering, all 32 years. Since 2006, he has been working at from Kyushu University, Fukuoka, Japan, in the Department of Biomedical Engineering, Faculty of Health and 1985, 1987 and 1990, respectively. From 1990 Medical Care, Saitama Medical University. Prof. Kano is a member to 1994, he was a Research Associate of the of the Japanese Society of Medical and Biomedical Engineering, the Department of Computer Science and Communica- Healthcare Engineering Association of Japan and the Japanese Society tion Engineering, Kyushu University. In 1994, of Medical Instrumentation. EMC EMI in Modern AC Motor Drive Systems Firuz Zare, Queensland University of Technology Brisbane, QLD, Australia Email: [email protected] Abstract—In this paper, several aspects of high frequency related analysis but the conditions are completely different at high issues of modern AC motor drive systems, such as common mode frequencies. voltage, shaft voltage and resultant bearing current and leakage Electromagnetic Interference (EMI) is a major problem in currents, have been discussed. Conducted emission is a major prob- recent motor drives that produces undesirable effects on elec- lem in modern motor drives that produce undesirable effects on tronic devices. In modern power electronic systems, increasing electronic devices. In modern power electronic systems, increasing power density and decreasing cost and size of a system are mar- power density and decreasing cost and size of system are market ket requirements. Switching losses, harmonics and EMI are the requirements. Switching losses, harmonics and EMI are the key key factors which should be considered at the beginning stage factors which should be considered at the beginning stage of a of a design to optimise a drive system. design to optimise a drive system. Common mode voltage creates shaft voltage through electro- static couplings between a rotor and stator windings and the ro- tor and a frame which can cause bearing currents when the shaft Introduction voltage exceeds a breakdown voltage level of the bearing grease. Nowadays, more than 60 percent of the world’s energy is used An increase in the carrier frequency of voltage-source Pulse to drive electric motors. Due to growing requirements of speed Width Modulated (PWM) inverters based on high-speed control, pulse width modulated inverters are used in adjustable switching devices has improved operating characteristics of the speed drives. Rapid developments in semiconductor technolo- inverters. High speed switching can generate the following se- gy have increased the switching speed and frequency of power rious problems due to high dv/dt: switches dramatically. In a motor drive system, a voltage source • Ground current escaping to earth through stray capacitors converter with hard switches generates high dv/dt, which inside a motor causes leakage currents due to stray capacitances in an electric • Conducted and radiated noises motor. As shown in Fig.1, a modern power electronic drive • Shaft voltage and bearing current consists of a filter, a rectifier, a DC link capacitor, an inverter Models of parasitic couplings and high frequency com- and an AC motor. Many small capacitive couplings exist in the ponents for an inverter fed induction motor drive system motor drive systems which may be neglected at low frequency are investigated to determine suitable models to predict ©2009 IEEE 53 Fig.2 shows the capacitive cou- Diode dc-Link plings of an induction motor and a Voltage Filter Rectifier Capacitor Inverter Cables Motor view of stator slot, where: Supply Cwr is the capacitive coupling be- tween the stator winding and rotor Cws is the capacitive coupling be- Filter tween the stator winding and stator frame Crs is the capacitive coupling be- tween the rotor and stator frame Cww is the capacitive coupling between turns of stator winding C is the capacitive coupling of PE ball ball bearing Fig.3 shows a general structure of Fig. 1. A power electronic motor drive system with capacitive couplings. a ball bearing and shaft in an AC ma- chine. As shown in this figure there are some balls between outer and in- ner races with lubricated grease be- Stator (s) tween the balls and the races. There Stator End Motor are capacitive couplings between the Winding Frame outer and inner races. During opera- Cww Crs Cwr tion, the distances between the balls Winding (w) and races may be changed and will Shaft C ball Ballbearing vary the capacitance values and resul- tant electric field between the races and balls. Due to this fact, this capac- Ballbearing Cball itance has a nonlinear value. Lubricat- Rotor ed grease in the ball bearing cannot Cwr withstand a high voltage and a short Cww End circuit through the lubricated grease Stator Cws Winding Rotor (r) may happen, thus this phenomenon can be modelled as a switch. Fig. 2. A view of stator slot and capacitive coupling in an induction motor. PWM inverters have been found to be a major cause of motor bearing failures in inverter motor drive sys- tems. All inverters generate common Outer Race Inner Race mode voltages relative to the ground, Ball which make bearing current through Outer Race motor parasitic capacitances. dBO CBO According to Fig.4.a, phase volt- ages and a common mode voltage (Vn) Shaft Ball can be derived based on the power C S converter voltages (Va, Vb,Vc). Each d BI CBI leg voltage of a three phase inverter Inner Race is given by: V 5 V 1 V (a) (b) (c) a an n Vb 5 Vbn 1 Vn (1) Vc 5 Vcn 1 Vn Fig. 3. (a) general structure of a ball bearing (b) a view of ball, outer and inner races and capacitive couplings (c) simple model of a ball bearing. And then: bearing currents and shaft voltage over a wide frequency Va 1 Vb 1 Vc 5 Van 1 Vbn 1 Vcn 1 3Vn (2) range. A high frequency model of an electric motor is an important issue for power electronic engineers, which helps It is clear that in a three-phase1 system: 2 them to analyse leakage and bearing currents and to design EMI filters. At low frequency, an equivalent circuit of an Van 1 Vbn 1 Vcn 5 0 (3) electric motor consists of inductances and resistances with- out considering stray capacitances and skin effect. These So, the common mode voltage can be calculated as: issues become more important at high speed switching ap- plications due to high dv/dt. Vn 5 Va 1 Vb 1 Vc /3 (4) 54 ©2009 IEEE 1 2 In a three phase power inverter, a DC voltage is converted to three phase voltages with 120° phase shift. Fig.4.b shows three phase leg voltages of an inverter with common mode voltage. V V V The trend in increasing switch- a b c ing frequency improves the quality of current waveforms in motor drive systems but due to short switching time, a high dv/dt is produced across the motor terminal. The leakage current is created by a high voltage Van Vbn Vcn stress during switching time and ca- pacitive coupling in an AC motor. Vn Fig.5 shows a simple equiva- (a) lent model of an induction motor which contains main capacitances 60 between the windings, rotor and the stator frame. 40 20 Analysis of an Electric Motor at High Frequency 0 The stray capacitance between the windings and the stator frame is the –20 most significant parasitic compo- –40 nent compared to the other stray capacitances which generate signifi- –60 cant conducted emission noise. At high frequency, an electric motor can be modeled as distributed capac- (b) itors, inductors and resistors as shown in Fig.6 and the maximum Fig. 4. (a) three phase voltage source inverter (b) PWM voltage. frequency can be determined using the standing wave’s equation. We consider one v section to model the motor at high frequency as shown in Fig.6.b and Winding Rotor only the stray capacitance between the windings and the stator has been considered. Each motor has different high frequency parameters due to its structure, size and materials. Cwr Cws Crs Cball Calculation of Cws The first step is to measure the magnitude and the phase values of the impedance in terms of frequency based on two different Stator Frame connections of the windings.
Recommended publications
  • Income? Bisone
    INCOME? BISONE ED 179 392 SP 029 296 $ AUTHOR Hamilton, Howard B. TITLE Problem Manual for Power Processiug, Tart 1. Electric Machinery Analysis. ) ,INSTITUTION Pittsbutgh Univ., VA. 51'014 AGENCY National Science Foundation, Weeshingtcni D.C. PUB DATE -70 GRANT NSF-GY-4138 NOTE 40p.; For_related documents', see SE 029 295-298 EDRS PRICE MF01/BCO2 Plus Postage. DESCRIPTORS *College Science: Curriculum Develoimeft: Electricity: Electromechanical lacshnology;- Electfonics: *Engineering Educatiob: Higher Education: Instructional Materials: *Problem Solving; Science CourAes:,'Science Curriculum: Science . Eductttion; *Science Materials: Scientific Concepts AOSTRACT This publication was developed as aPortion/ofa . two-semester se4uence commencing t either the-sixth cr seVenth.term of the undergraduate program in electrical engineering at the University of Pittsburgh. The materials of tfie two courses, produced by' National Science Foundation grant, are concernedwitli power con ion systems comprising power electronic devices, electromechanical energy converters, and,associnted logic configurations necessary to cause the systlp to behave in a, prescrib,ed fashion. The erphasis in this portion of the'two course E` sequende (Part 1)is on electric machinery analysis.. 7his publication is-the problem manual for Part 1, which provide's problems included in 4, the first course. (HM) 4 Reproductions supplied by EDPS are the best that can be made from the original document. * **************************v******************************************** 2
    [Show full text]
  • Academic Regulations, Course Structure and Detailed Syllabus
    ACADEMIC REGULATIONS, COURSE STRUCTURE AND DETAILED SYLLABUS M.Tech (POWER ELECTRONICS AND ELECTRIC DRIVES) FOR MASTER OF TECHNOLOGY TWO YEAR POST GRADUATE COURSE (Applicable for the batches admitted from 2014-2015) R14 ANURAG GROUP OF INSTITUTIONS (AUTONOMOUS) SCHOOL OF ENGINEERING Venkatapur, Ghatkesar, Hyderabad – 500088 ANURAG GROUP OF INSTITUTIONS (AUTONOMOUS) M.TECH. (POWER ELECTRONICS AND ELECTRIC DRIVES) I YEAR - I SEMESTER COURSE STRUCTURE AND SYLLUBUS Subject Code Subject L P Credits A31058 Machine Modeling& Analysis 3 0 3 A31059 Power Electronic Converters-I 3 0 3 A31024 Modern Control Theory 3 0 3 A31060 Power Electronic Control of DC Drives 3 0 3 Elective-I 3 0 3 A31029 HVDC Transmission A31061 Operations Research A31062 Embedded Systems Elective-II A31027 Microcontrollers and Applications 3 0 3 A31063 Programmable Logic Controllers and their Applications A31064 Special Machines A31213 Power Converters Lab 0 3 2 A31214 Seminar - - 2 Total 18 3 22 I YEAR - II SEMESTER Subject Subject L P Credits Code A32058 Power Electronic Converters-II 3 0 3 A32059 Power Electronic Control of AC Drives 3 0 3 A32022 Flexible AC Transmission Systems (FACTS) 3 0 3 A32060 Neural Networks and Fuzzy Systems 3 0 3 Elective-III A32061 Digital Control Systems 3 0 3 A32062 Power Quality A32063 Advanced Digital Signal Processing Elective-IV A32064 Dynamics of Electrical Machines A32065 High-Frequency Magnetic Components A32066 3 0 3 Renewable Energy Systems A32213 Electrical Systems Simulation Lab 0 3 2 A32214 Seminar-II - - 2 Total 18 3 22 II YEAR – I SEMESTER Code Subject L P Credits A33219 Comprehensive Viva-Voce - - 2 A33220 Project Seminar 0 3 2 A33221 Project Work Part-I - - 18 Total Credits - 3 22 II YEAR – II SEMESTER Code Subject L P Credits A34207 Project Work Part-II and Seminar - - 22 Total - - 22 L P C M.
    [Show full text]
  • Course Description Bachelor of Technology (Electrical Engineering)
    COURSE DESCRIPTION BACHELOR OF TECHNOLOGY (ELECTRICAL ENGINEERING) COLLEGE OF TECHNOLOGY AND ENGINEERING MAHARANA PRATAP UNIVERSITY OF AGRICULTURE AND TECHNOLOGY UDAIPUR (RAJASTHAN) SECOND YEAR (SEMESTER-I) BS 211 (All Branches) MATHEMATICS – III Cr. Hrs. 3 (3 + 0) L T P Credit 3 0 0 Hours 3 0 0 COURSE OUTCOME - CO1: Understand the need of numerical method for solving mathematical equations of various engineering problems., CO2: Provide interpolation techniques which are useful in analyzing the data that is in the form of unknown functionCO3: Discuss numerical integration and differentiation and solving problems which cannot be solved by conventional methods.CO4: Discuss the need of Laplace transform to convert systems from time to frequency domains and to understand application and working of Laplace transformations. UNIT-I Interpolation: Finite differences, various difference operators and theirrelationships, factorial notation. Interpolation with equal intervals;Newton’s forward and backward interpolation formulae, Lagrange’sinterpolation formula for unequal intervals. UNIT-II Gauss forward and backward interpolation formulae, Stirling’s andBessel’s central difference interpolation formulae. Numerical Differentiation: Numerical differentiation based on Newton’sforward and backward, Gauss forward and backward interpolation formulae. UNIT-III Numerical Integration: Numerical integration by Trapezoidal, Simpson’s rule. Numerical Solutions of Ordinary Differential Equations: Picard’s method,Taylor’s series method, Euler’s method, modified
    [Show full text]
  • Power Processing, Part 1. Electric Machinery Analysis
    DOCONEIT MORE BD 179 391 SE 029 295,. a 'AUTHOR Hamilton, Howard B. :TITLE Power Processing, Part 1.Electic Machinery Analyiis. ) INSTITUTION Pittsburgh Onii., Pa. SPONS AGENCY National Science Foundation, Washingtcn, PUB DATE 70 GRANT NSF-GY-4138 NOTE 4913.; For related documents, see SE 029 296-298 n EDRS PRICE MF01/PC10 PusiPostage. DESCRIPTORS *College Science; Ciirriculum Develoiment; ElectricityrFlectrOmechanical lechnology: Electronics; *Fagineering.Education; Higher Education;,Instructional'Materials; *Science Courses; Science Curiiculum:.*Science Education; *Science Materials; SCientific Concepts ABSTRACT A This publication was developed as aportion of a two-semester sequence commeicing ateither the sixth cr'seventh term of,the undergraduate program inelectrical engineering at the University of Pittsburgh. The materials of thetwo courses, produced by a ional Science Foundation grant, are concernedwith power convrs systems comprising power electronicdevices, electrouthchanical energy converters, and associated,logic Configurations necessary to cause the system to behave in a prescribed fashion. The emphisis in this portionof the two course sequence (Part 1)is on electric machinery analysis. lechnigues app;icable'to electric machines under dynamicconditions are anallzed. This publication consists of sevenchapters which cW-al with: (1) basic principles: (2) elementary concept of torqueand geherated voltage; (3)tile generalized machine;(4i direct current (7) macrimes; (5) cross field machines;(6),synchronous machines; and polyphase
    [Show full text]
  • Performance Rating of Variable Frequency Drives
    AHRI Standard 1210 (I-P) 2017 Standard for Performance Rating of Variable Frequency Drives IMPORTANT SAFETY DISCLAIMER AHRI does not set safety standards and does not certify or guarantee the safety of any products, components or systems designed, tested, rated, installed or operated in accordance with this standard/guideline. It is strongly recommended that products be designed, constructed, assembled, installed and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this standard/guideline. AHRI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices. AHRI does not certify or guarantee that any tests conducted under its standards/guidelines will be non- hazardous or free from risk. Note: This standard supersedes ANSI/AHRI Standard 1210 (I-P)-2011 with Addenda 1 and 2. For SI ratings, see AHRI Standard 1211 (SI)-2017. AHRI CERTIFICATION PROGRAM PROVISIONS Scope of the Certification Program The Certification Program includes all Variable Frequency Drive as defined in Section 2 of this standard. Certified Ratings The following certification program ratings are verified by test as indicated in Section 7.1 at the Standard Rating Conditions: Drive System Efficiency, %. Motor Insulation Stress Peak Voltage, V Motor Insulation Stress Rise Time, µsec Power Line Harmonics (Total Harmonic Current Distortion), %. Price $10.00 (M) $20.00 (NM) ©Copyright 2017, by Air-Conditioning, Heating and Refrigeration Institute Printed
    [Show full text]
  • AC Servo Motor & D2 Drive
    AC Servo Motor & D2 Drive Technical Information AC Servo Motor & D2 Drive HIWIN MIKROSYSTEM CORP. No.6, Jingke Central Rd., Taichung Precision Machinery Park, Taichung 40852, Taiwan Tel: +886-4-23550110 Fax: +886-4-23550123 www.hiwinmikro.tw [email protected] Subsidiaries & R&D Centers HIWIN GmbH HIWIN Schweiz GmbH HIWIN KOREA OFFENBURG, GERMANY JONA, SWITZERLAND SUWON, KOREA www.hiwin.de www.hiwin.ch www.hiwin.kr www.hiwin.eu [email protected] [email protected] [email protected] HIWIN JAPAN HIWIN FRANCE HIWIN CHINA KOBE‧TOKYO‧NAGOYA‧NAGANO‧ ECHAUFFOUR, FRANCE SUZHOU, CHINA TOHOKU‧HOKURIKU‧HIROSHIMA‧ www.hiwin.fr www.hiwin.cn KUMAMOTO‧FUKUOKA, JAPAN [email protected] [email protected] www.hiwin.co.jp [email protected] HIWIN USA HIWIN s.r.o. Mega-Fabs Motion System, Ltd. CHICAGO‧SILICON VALLEY, U.S.A. BRNO, CZECH REPUBLIC HAIFA, ISRAEL www.hiwin.com www.hiwin.cz www.mega-fabs.com [email protected] [email protected] [email protected] HIWIN Srl HIWIN SINGAPORE BRUGHERIO, ITALY SINGAPORE www.hiwin.it www.hiwin.sg [email protected] [email protected] Technical Information The specifications in this catalog are subject to change without notification. ©2017 FORM MD99TE06-1704 (PRINTED IN TAIWAN) INDUSTRIE 4.0 Best Partner Linear Motor Stage Linear Motor Automated transport / AOI application / Machine tool / Touch panel industry / Precision / Semiconductor Semiconductor industry / • Iron-core Linear Motor Laser manufacturing machine / • Coreless Linear Motor Glass cutting machine • Linear Shaft Motor LMT • Ironcore linear motor-LMFA series, • Planar Servo Motor LMSA series,
    [Show full text]
  • Servomotor Parameters and Their Proper Conversions for Servo Drive Utilization and Comparison
    Servomotor Parameters and their Proper Conversions for Servo Drive Utilization and Comparison Servomotor Parameters and their Proper Conversions for Servo Drive Utilization and Comparison 1 Hurley Gill, Senior Application / Systems Engineer Servomotor Parameters and their Proper Conversions for Servo Drive Utilization and Comparison Utilization of servomotor parameters in their correct units of measure as defined by the drive manufacturer is imperative for achieving desired mechanism performance. But without proper understanding of motor and drive parameter details relative to their defined terms, units, nomenclature and the calculated conversions between them, incorrect units are likely to be applied which complicate both machine design development and the manufacturing process. This white paper demonstrates exactly how and 6-step (i.e. trapezoidal commutation). While machine designers can overcome challenges most servomotor parameters are presented in one around servomotor parameters and apply them of three ways, they are often mixed between the correctly for any motor or drive to meet specific two different electronic commutation methods. requirements. A customary standard set of servo (Refer to Motor Parameters Conversion Table on units is thoroughly explained together with their page 6.) typical nomenclature and the applicable conversions between them. Typical terminologies used to describe While the motor parameter data entered into the servomotors are: Brushless DC Motor (BDCM or servo drive must be in the units that the designer BLDCM) Servo, Brushless DC/AC Synchronous specifically intended, there are often differences Servomotor, AC Permanent Magnet (PM) Servo between this data and their defined corresponding and other similar naming conventions. Most of units of measure presented on a motor datasheet.
    [Show full text]
  • ON Semiconductor Is
    ON Semiconductor Is Now To learn more about onsemi™, please visit our website at www.onsemi.com onsemi and and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. onsemi reserves the right to make changes at any time to any products or information herein, without notice. The information herein is provided “as-is” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by onsemi. “Typical” parameters which may be provided in onsemi data sheets and/ or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. onsemi does not convey any license under any of its intellectual property rights nor the rights of others.
    [Show full text]
  • Status of Pure Electric Vehicle Power Train Technology and Future Prospects
    Review Status of Pure Electric Vehicle Power Train Technology and Future Prospects Abhisek Karki 1,2,* , Sudip Phuyal 3,4,* , Daniel Tuladhar 1, Subarna Basnet 5 and Bim Prasad Shrestha 1 1 Department of Mechanical Engineering, Kathmandu University, Dhulikhel 45200, Nepal; [email protected] (D.T.); [email protected] (B.P.S.) 2 Aviyanta ko Karmashala Pvt. Ltd., Bhaktapur 44800, Nepal 3 Department of Electrical and Electronics Engineering, Kathmandu University, Dhulikhel 45200, Nepal 4 Institute of Himalayan Risk Reduction, Lalitpur 44700, Nepal 5 International Design Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; [email protected] * Correspondence: [email protected] (A.K.); [email protected] (S.P.) Received: 14 July 2020; Accepted: 10 August 2020; Published: 17 August 2020 Abstract: Electric vehicles (EV) are becoming more common mobility in the transportation sector in recent times. The dependence on oil as the source of energy for passenger vehicles has economic and political implications, and the crisis will take over as the oil reserves of the world diminish. As concerns of oil depletion and security of the oil supply remain as severe as ever, and faced with the consequences of climate change due to greenhouse gas emissions from the tail pipes of vehicles, the world today is increasingly looking at alternatives to traditional road transport technologies. EVs are seen as a promising green technology which could lead to the decarbonization of the passenger vehicle fleet and to independence from oil. There are possibilities of immense environmental benefits as well, as EVs have zero tail pipe emission and therefore are capable of curbing the pollution problems created by vehicle emission in an efficient way so they can extensively reduce the greenhouse gas emissions produced by the transportation sector as pure electric vehicles are the only vehicles with zero-emission potential.
    [Show full text]
  • Electrical Engineering
    DEPARTMENT OF ELECTRICAL ENGINEERING Syllabus for M. Tech. Power Electronics & Drives MEE-101 Advance Microprocessors and Applications Max. Marks: 100 (Credit=5) L T P 3 1 2 UNIT I (9 Lecture) Introduction to Microprocessors and Microcontrollers: Review of basics microprocessor,architecture and instruction set of a typical 8-bit microprocessor.Overview of 16 bit and 32 bit microprocessors, arithmetic and I/O coprocessors. Architecture, register details, operation, addressing modes and instruction set of 16 bit 8086 microprocessor, assembly language programming, introduction to multiprocessing, multi-user, multitasking operating system concepts, Pentium-1,2,3 and 4 processors, Motorola 68000 processor.Concepts of micro controller and microcomputer, microcontroller (8051/8751) based design, applications of microcomputer in on line real time control UNIT II (9 Lecture) Input/Output,Memory Interfacing: Parallel and series I/O, Interrupt driven I/O, single and multi-interrupt levels, use of software polling and interrupt controlling for multiplying interrupt levels, programmable interrupt controller, DMA controller, programmable timer/counter, programmable communication and peripheral interface, synchronous and asynchronous data transfer, standard serial interfaces like Rs.232. Types of Memory, RAM and ROM interfacing with timing considerations, DRAM interfacing UNIT III (9 Lecture) Programmable Support Chips: Functional schematic, operating modes, programming and interfacing of 8255, 8251, 8259 and 8253 with microprocessor UNIT IV (9 Lecture) Analog Input & Output: Microprocessor compatible ADC and DAC chips, interfacing of ADC and DAC with microprocessor, user of sample and hold circuit and multiplexer with ADC. Microprocessor Applications: Design methodology, examples of microprocessor applications. Lists of experiments 1. Simple arithmetic operations: Multi precision addition / subtraction / multiplication / division.
    [Show full text]
  • Integrated Motor Drive Controllers Catalog
    Catalog Integrated Motor Drive Controllers IMDC01EN PT, PR & PS-Series www.electrocraft.com Headline Headline www.electrocraft.com For over 60 years, ElectroCraft has been helping engineers translate innovative ideas into reality – one reliable solution at a time. As a global specialist in custom motor and motion technology, we provide the engineering capabilities and worldwide resources you need to succeed. Table of Contents Integrated Motor Drive Controllers Advantages of Integrated Motor Drive Controllers . 3 About Integrated Motor Drive Controllers . 5 Drive Features . .6 Electrical Specifications . 7 MotionPRO Software . 8 PT-Series PR-Series PS-Series Page 9 Page 13 Page 17 Product Range . 21 Part Number Configurator . 23 Accessories . 24 This guide has been developed as a quick reference tool for ElectroCraft products. It is not intended to replace technical documentation or proper use of standards and codes in installation of product. Because of the variety of uses for the products described in this publication, those responsible for the application and use of this product must satisfy themselves that all necessary steps have been taken to ensure that each application and use meets all performance and safety requirements, including all applicable laws, regulations, codes and standards. Reproduction of the contents of this copyrighted publication, in whole or in part without written permission of ElectroCraft is prohibited. Designed by stilbruch.me 2 Advantages of Integrated Motor Drive Controllers ElectroCraft PRO Series Integrated Motor Drive Controllers (IMDC) combine our most advanced motor, drive and control technologies into a single package to provide a new level of motion control capability. The motor types have been selected for their compact size, high performance characteristics and rugged, field-proven capabilities.
    [Show full text]
  • Vector Control of Three Phase Induction Motor
    International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 07 | July 2019 www.irjet.net p-ISSN: 2395-0072 Vector Control of Three Phase Induction Motor Prof. Jisha Kuruvila1, Abhijith S2, John Joseph3, Ajmal U P4, J Jaya Sankar5 1Assistant Professor, Dept. of Electrical and Electronics Engineering, Mar Athanasius College of Engineering, Kothamangalam, Kerala, India 2,3,4,5Student, Dept. of Electrical and Electronics Engineering, Mar Athanasius College of Engineering, Kothamangalam, Kerala, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - High dynamic performance, which is obtained separately excited DC motor, and achieve the same quality of from DC motors, became achievable from induction motors dynamic performance. As for DC machines, torque control in with the advances in power semiconductors, digital signal AC machines is achieved by controlling the motor currents. processors and development in control techniques. By using field oriented control, torque and flux of the induction motors However, in contrast to a DC machine, in AC machine, both can be controlled independently as in DC motors. The control the phase angle and the modulus of the current has to be performance of field oriented induction motor drive greatly controlled, or in other words, the current vector has to be depends on the stator flux estimation. Vector control, also controlled. This is the reason for the terminology vector called field-oriented control, is a variable-frequency drive control. control method in which the stator currents of a three-phase AC electric motor are identified as two orthogonal components 2. FIELD ORIENTATION CONTROL that can be visualized with a vector. One component defines the magnetic flux of the motor, the other the torque.
    [Show full text]