By Topic

Industry Applications, IEEE Transactions on

Issue 1 • Date Jan.-Feb. 1997

Filter Results

Displaying Results 1 - 25 of 37
  • Society President's message: Membership needs and IAS changes [Guest Feature]

    Page(s): 5
    Save to Project icon | Request Permissions | PDF file iconPDF (183 KB)  
    Freely Available from IEEE
  • Recognition of 1996 Transactions Papers Reviewers

    Page(s): 8 - 23
    Save to Project icon | Request Permissions | PDF file iconPDF (1167 KB)  
    Freely Available from IEEE
  • Comparative performance of open and totally enclosed machines

    Page(s): 154 - 159
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1348 KB)  

    Continuous improvements in insulating materials, manufacturing consistencies in sealed windings and extensive laboratory testing of various systems show that synchronous machines with NEMA II construction can replace totally enclosed machines. Tests on windings in corrosive atmospheres show that sealed insulation systems are impervious to the environment. Standard maintenance ensures that incendive arcing will not be generated in potentially hazardous environments. When compared to totally enclosed machines, the NEMA II-type construction is lighter, more efficient, has lower short-circuit current and associated torques and is easier to maintain View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Introduction to IEEE 841-1994, IEEE standard for petroleum and chemical industry-Severe duty totally enclosed fan-cooled (TEFC) squirrel cage induction motors-up to and including 500 hp

    Page(s): 160 - 166
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (684 KB)  

    IEEE 841, Recommended Practice for Chemical Industry Severe Duty Squirrel-Cage Induction Motors-600 V and Below, first issued in 1986, has been significantly revised and reissued as a Standard. The scope has been increased to include severe duty TEFC squirrel-cage induction motors with antifriction bearings in sizes up to and including 500 horsepower. Motor rated voltages of 2300 V and 4000 V have been added. Changes to the standard are reviewed in detail. Requirements are identified that improve motor reliability and increase motor life View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Selection and installation of a vertical roller mill for clinker pregrinding

    Page(s): 114 - 119
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1004 KB)  

    A vertical roller mill has been installed in a Canadian cement plant for the pregrinding of Portland cement clinker. It is the first application of this type of technology in the Western Hemisphere. The process of selection of the technology and the development of the engineering project are described View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Field-oriented control of an induction motor with robust on-line tuning of its parameters

    Page(s): 35 - 42
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (816 KB)  

    This paper proposes new torque control of an induction motor, which is robust against primary resistance and adaptable to leakage inductance, magnetizing inductance, and secondary time constant. The control is based on flux feedback with a flux simulator. Since the simulator is based on a rotor current model, it is independent of the primary resistance, but uses the magnetizing inductance and secondary time constant values to estimate the flux. Parameter mismatch in the simulator detrimentally affects flux and torque responses. In order to compensate for degradation of the responses, an identifier for the magnetizing inductance and the secondary time constant is introduced. The identifier is insensitive to the primary resistance because it is based on instantaneous reactive power of the motor. Also, a leakage inductance identifier is introduced to achieve perfect compensation, which is robust against other parameters owing to instantaneous harmonic reactive power. To verify feasibility of the proposed technique, digital simulations and experimental tests have been conducted. The results have proven excellent characteristics of the drive system, which confirms validity of the scheme View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Inferring power consumption and electrical performance from motor speed in oil-well pumping units

    Page(s): 187 - 193
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (696 KB)  

    Field tests are described which show that steady-state motor performance data can be used to simulate dynamic conditions in rod-pumped wells. It is shown that manufacturer-supplied data and motor speed measurements can be used to evaluate electrical quantities without the use of electrical measuring equipment. Further, it is shown that electrical predictions can be usefully incorporated into mechanical models of the rod pumping system. It is hoped that the ideas presented will help extend the economic life of hundreds of thousands of rod-pumped wells View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • EMTP modeling of IGBT dynamic performance for power dissipation estimation

    Page(s): 64 - 71
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (604 KB)  

    A new approach to the modeling of insulated gate bipolar transistors (IGBTs) for electromagnetic transients program (EMTP) simulation is developed. Other commercially available simulators, such as PSPICE, model the devices on an exact semiconductor physics basis. They suffer from large amounts of CPU time for sinewave pulsewidth modulation (PWM) inverter applications which require a complete cycle simulation at fundamental frequency with a small time step to cover the details of IGBT switching transients. This approach uses a curve-fitting method, combined with the point-by-point user-defined function available in EMTP, to model the dynamic characteristics of IGBTs. Since there is no device physics modeling required, this simulation is much faster than the conventional approach. The proposed method is applicable to both static and dynamic modeling, on a cycle-by-cycle basis, which is important for dynamic power dissipation and thermal analysis. The simulation includes IGBT turn-on and turn-off transients, IGBT saturation, free-wheeling diode forward voltage and reverse recovery characteristics. The simulation results are verified by comparison with experimental measured data. Measurements show a close agreement with simulations View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Constant energy device test for electrostatic discharge (ESD) of semiconductor devices

    Page(s): 286 - 297
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (896 KB)  

    An analysis is presented fur the models and test methods used to simulate the electrostatic discharge (ESD) event for a charged semiconductor device. A new constant energy device (CED) test method is proposed to provide control of charge and potential for constant energy discharges and give a better evaluation of device reliability. Experimental results are presented for tests conducted on a basic CMOS structure View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electrical transient stability and underfrequency load shedding analysis for a large pump station

    Page(s): 194 - 201
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1808 KB)  

    Electrical transients from power system faults, loss of generation and load swings can disrupt petroleum pumping station operations. Isolated stations with no utility tie, and those with weak utility ties, are especially at risk. Relative to this problem, the following four main issues are addressed: (1) analysis of the methods that use high-speed underfrequency load shedding to maintain power system stability and preserve pumping station operations; (2) analysis of combustion gas turbine generator and diesel generator transient responses, as they pertain to the electrical engineer; (3) discussion of power system component modeling and the use of low voltage circuit switching devices to shed loads; (4) and comparison of two computer analysis program outputs for underfrequency load shedding responses View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On-line control strategies to minimize peak loads on mine conveyor networks using surge units with variable discharging capability

    Page(s): 90 - 99
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1004 KB)  

    Control of peak loads on gathering belts in mine conveyor systems can result in substantial reductions in power consumption as well as savings in capital and maintenance costs for the conveyor equipment. This paper first extends an existing control approach involving dynamic adjustment of feeder discharge rates to the case where the differences in transit times between section feeders and the gathering belts where the flows converge are small. It is shown that multiple units should be considered simultaneously when determining control actions, and a dynamic programming approach is given for determining the optimal control policy in such a situation. Subsequently, the application of this approach is considered for longwall mines where flow from the longwall is not controlled, but the discharge rates of continuous miner section feeders are adjusted in real-time to prevent belt overloading while minimizing any production constraint on the continuous miner units. This application requires special treatment for the highly variable material flow pattern produced by longwalls. The practical utility of these approaches is evaluated through detailed simulation studies. These studies are used to estimate the magnitude of savings in energy, capital, and maintenance costs View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Preventing IR interference between infrared waves emitted by high-frequency fluorescent lighting systems and infrared remote controls

    Page(s): 239 - 245
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (716 KB)  

    The authors describe IR (infrared waves) interference between IR remote-control systems for electric home appliances and high-frequency electronic ballast lighting. The separation of the carrier frequency of an IR remote-control system and the lamp operating frequency of high-frequency lighting is the most efficient way of preventing this interference. The phenomenon, preventive approaches and experimental results of IR interference experiments are also described View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An insightful approach to H position controller design for an electric motor attached to a flexible structure

    Page(s): 257 - 263
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (708 KB)  

    This paper deals with the practical problem of controlling electric motors when they are attached to mechanical supports with structural resonances that interact with the controlled motor. This paper focuses on the use of classical Bode analysis techniques to gain insight into the development of an H controller for an electric motor attached to a flexible structure. Bode plots are used to provide a meaningful guide to adjusting control weightings in the H problem formulation such that performance objectives are achieved. This approach is applied to the inertial position regulation of a gimballed pointing payload with significant structural resonances. Both simulation and experimental results are presented View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simulation of power electronic circuits with principles used in wave digital filters

    Page(s): 49 - 57
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (712 KB)  

    Simulation is a well-known technique to study complex systems. This paper introduces a new simulation technique based on the theory of wave digital filters. They are candidates to substitute classical analog filters by digital electronic circuits in signal processing. In addition, they show advantages compared with other classes of digital filters such as fast algorithms and simple models of electric components. Therefore, the theory of wave digital filters is used to build a new simulator for transient simulation. So far, the properties of this simulator permit a fair comparison between the new simulation technique and well-known simulation programs. The new simulator is easily linked to a CAD program to design and optimize switch mode power supplies already in use in industry View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reliability comparison between standard and energy efficient motors

    Page(s): 135 - 142
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (712 KB)  

    There are always tradeoffs when maximizing a specific motor performance parameter such as efficiency. The purpose of this paper is to compare the various performance parameters and elements which determine motor reliability. The impact on motor life is considered, along with its robustness. Only the three-phase squirrel-cage induction motors covered by the 1992 Energy Act are covered in this presentation, as compared to “standard” motors View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Utility rebates for efficient motors-the outlook for demand-side management

    Page(s): 143 - 153
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1092 KB)  

    Since 1987, many electric utilities throughout North America have been actively promoting demand-side management (DSM), the attempt to conserve fuels and postpone costly generating capacity increases by encouraging customers to use more efficient electrical equipment, including motors. One popular DSM program has been utility payment of cash rebates to purchasers of more efficient motors. Today, such payments face extinction in a rapidly changing utility economic climate based on deregulation. How rebates originated, the basis for such payments, how successful rebate programs have been, and what the future holds for them are the subjects of this paper View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Installation of a hydraulic kiln drive to eliminate a resonant vibration problem

    Page(s): 106 - 113
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (932 KB)  

    Large, dual electromechanical drive systems have been shown to often experience vibration problems due to the high inertia of the components of these systems and the large number of resonant frequencies experienced by these drives. Hydraulic drives, by comparison, are extremely low inertia drives that have fewer resonant frequencies and benefit from the damping characteristic of the hydraulic oil used to transmit power. Additional benefits include the ability to isolate components while operating the drive and smooth speed control starting at extremely low speeds and full rated torque. This paper outlines the vibration problems that were experienced in the dual drive of a 655-ft long with 22-ft and 19-ft diameter section rotary cement kiln between 1979 and 1993. A number of analytical and empirical studies were performed, and various modifications were made or considered, to reduce the vibration in the drive train. Finally, in 1994 when the existing drive reached the end of its life, it was replaced with a hydraulic system. The methods used and considered to reduce the vibration are discussed, as well as the critical elements in deciding on a hydraulic drive, and the design issues encountered including questions of drive efficiency, reliability, maintenance, and control. Results to date of the hydraulic drive are discussed, including the elimination of the vibration problem and added flexibility in speed control View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Single large roller mill feeds today's jumbo cement plants

    Page(s): 120 - 125
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1524 KB)  

    The use of a single roller mill to supply kiln feed has always been the most economical approach to new cement plant construction. However, the ability to design and build mills large enough to supply today's 7500+ tons per day cement kilns has sometimes been questioned. The successful start up and operation of the 5.9-m roller mill at P.T. Semen Gresik's Tuban plant, Indonesia, has proven that reliable mills can be built for this application. Years of experience, together with modern computer-aided design techniques, has been the key to opening up the future for large roller mills. Here, the design capabilities needed to successfully produce large mills, as well as the operational features of modern roller mills, are discussed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Starting performance of high-frequency electronic ballasts for four-foot fluorescent lamps

    Page(s): 234 - 238
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (512 KB)  

    With the rapidly increasing number of electronic ballast manufacturers and ballast products entering the market recently, the compatibility of fluorescent lamps with electronic ballasts has become one of the major concerns among specifiers and users. In 1993, the American National Standards Institute (ANSI) published ANSI C82.11-1993, which describes recommendations for high-frequency operation of fluorescent lamp ballasts. To address compatibility issues for lamp starting, ANSI C82.11 limits the average value of the RMS glow current to a maximum of 25 mA and lamp preheat time to a minimum of 500 ms. ANSI's definitions of glow current and preheat time are made on an ideal lamp starting curve. In reality, some electronic ballasts produce lamp starting curves very different from ANSI's definition, creating difficulties in practical measurements of glow current and preheat time. This research work tested lamp starting characteristics of 17 different electronic ballasts on 2-F40T12 lamps. The results showed that the starting performance of electronic ballasts varied; some met ANSI's requirements, but some did not. The results also showed that using electrode voltage can better define preheat time and glow current, which can better characterize the starting performance of electronic ballasts and ensure reliable testing procedures View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simultaneous measurements of wire electrode surface contamination and corona discharge characteristics in an air-cleaning electrostatic precipitator

    Page(s): 279 - 285
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1120 KB)  

    Contamination of the corona wire in a wire-to-plate type air-cleaning electrostatic precipitator is studied experimentally. In order to enhance the contamination of wire, air containing dust is directly supplied to a part of the wire electrode. Spores of Lycopodium and cigarette smoke particles are used as test dusts. Simultaneous measurements of wire electrode optical images and corona discharge modes are carried out during contamination processes. Results show that corona discharge modes and optical emission from the wire electrode change with time due to the surface contamination, in the case of cigarette smoke, after a time elapsed, streamer coronas appear due to the buildup of smoke particles on the wire surface. After the first streamer generation, the corona current fluctuates with time because the formation and diminution of the projections occur alternately at the different parts on the wire electrode surface View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Speed control of interior permanent magnet synchronous motor drive for the flux weakening operation

    Page(s): 43 - 48
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (640 KB)  

    A novel flux-weakening scheme for the interior permanent magnet synchronous motor (IPMSM) is proposed. This is implemented based on the output of the synchronous PI current regulator-reference voltage to the PWM inverter. The onset of flux weakening and the flux level are adjusted inherently by the outer voltage regulation loop to prevent saturation of the current regulator. Attractive features of this flux weakening scheme include no dependency on the machine parameters. The guarantee of current regulation at any operating condition, and smooth and fast transition into and out of the flux weakening mode. Experimental results at various operating conditions including the case of detuned parameters are presented to verify the feasibility of the proposed control scheme View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An improved electronic transformer for low-power halogen cycle lamps

    Page(s): 246 - 251
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (496 KB)  

    Halogen cycle lamps are used for both outdoor and indoor lighting although low-power halogen cycle lamps are used in indoor lighting. When lamp power is below 50 W these lamps cannot be connected to power line directly because a low input voltage, between 6 and 24 V, is needed. Traditional supply equipments for low-power halogen lamps are 50/60-Hz transformers, but they are bulky and heavy. A low-cost, reliable, high-frequency supply system (an electronic transformer) for low-power halogen cycle lamps, based on a self-oscillating half-bridge inverter, is described in this paper. Compared with a 50-Hz transformer, weight and size have been minimized. Moreover, a high power factor, more than 0.9, has been achieved, and the circuit is reliable and flexible View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Controlling static electricity in hazardous (classified) locations

    Page(s): 209 - 215
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (768 KB)  

    This paper discusses potential sources of static electricity in chemical manufacturing operations and proposes practical methods for remediation to prevent fire and personal injury. It discusses the probabilities of static electricity ignition in Division 1 versus Division 2 locations and makes recommendations for controlling static electricity in each location View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comparison of ANSI/IEEE and IEC requirements for metal-clad switchgear

    Page(s): 216 - 225
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1128 KB)  

    In the emerging global marketplace, differences in product standards and design practices in different parts of the world are coming to the forefront as nontariff trade barriers. This paper discusses the differences between metal-clad switchgear designed and applied in accordance with ANSI/IEEE standards and related practices, which are normally used in North America, and the same equipment designed and applied in accordance with IEC standards and practices, which are normally used in Europe. Other parts of the world may use either or both of these two standards, often depending on the source of the funds for a particular project or the commercial relationships between the host country and the equipment suppliers. The paper covers differences in ratings, features and design testing View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Prediction of power requirements for a longwall armored face conveyor

    Page(s): 80 - 89
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1056 KB)  

    Longwall armored face conveyors (AFCs) have traditionally been designed using a combination of heuristics and simple models. However, as longwalls increase in length, these design procedures are proving to be inadequate. The result has either been a costly loss of production due to AFC stalling or component failure, or larger than necessary capital investment due to overdesign. In order to allow accurate estimation of the power requirements for an AFC, this paper develops a comprehensive model of all the friction forces associated with the AFC. Power requirement predictions obtained from these models are then compared with measurements from two mine faces View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

The scope of the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS includes all scope items of the IEEE Industry Applications Society, that is, the advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture, and application of electrical systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; the creation of voluntary engineering standards and recommended practices; and the professional development of its membership.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Carlton E. Speck