By Topic

Industry Applications, IEEE Transactions on

Issue 3 • Date May-June 2003

Filter Results

Displaying Results 1 - 25 of 39
  • A novel startup scheme of stator-flux-oriented vector-controlled induction motor drive without torque jerk

    Page(s): 776 - 782
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (637 KB) |  | HTML iconHTML  

    This paper proposes a novel zero-speed startup scheme of a stator-flux-oriented speed-sensorless vector-controlled induction motor drive that does not generate any torque jerk. A programmable cascaded three-stage low-pass filter (LPF) method is used for flux vector estimation. Usually, a torque jerk is generated at the vector control transition due to time delay in developing the stator flux by the three-stage LPF. At standstill condition, an algorithm is derived that calculates the stator flux using only the stator currents. A feedforward control strategy of the stator flux is developed to eliminate the torque jerk during transition from the standstill mode to the vector control mode. The performance of the newly developed startup scheme has been verified by simulation and then experimentally on a 3-hp induction motor drive, where the control was implemented by a 32-bit TMS320C30-type digital signal processor. The performance of the drive was found to be excellent in both simulation and experiment. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An enhanced method of providing sensitive bus fault protection

    Page(s): 600 - 604
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (253 KB) |  | HTML iconHTML  

    The application of bus fault protection in industrial facilities has been primarily limited to overcurrent relays located at the upstream breaker. This does not always provide the best protection for bus faults. The protection sensitivity is limited because of the need to coordinate with other downstream overcurrent devices. This paper describes an enhanced method of applying sensitive bus fault protection using digital overcurrent relays. In addition, this method provides both downstream feeder breaker backup protection and relay backup protection. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Observer-based robust adaptive control of PMSM with initial rotor position uncertainty

    Page(s): 645 - 656
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (785 KB) |  | HTML iconHTML  

    In this paper, a mathematical model of permanent-magnet synchronous motor (PMSM) with initial rotor position uncertainty is derived and its control methodology is proposed. Based on Lyapunov stability theory, an observer-based robust adaptive position and speed-tracking control system for the PMSM is developed given that all parameters including load inertia and motor parameters are unknown, acceleration is not measurable and friction and external disturbances are bounded. An incremental encoder which provides relative position of the rotor is used along with stator current signals to achieve stable control. The simulation and experimental results have proven the stability and efficacy of the proposed control law. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Test for series-connected circuit breakers

    Page(s): 605 - 611
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (261 KB) |  | HTML iconHTML  

    Series-rated circuit breakers are commonplace, but not always well understood. This paper provides basic information on how a series rating is tested and relates that information to the interaction of the overcurrent protective devices involved. The paper also explores the question of whether calculations can be used to determine the series rating of an untested combination. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comparison of the acoustic noise of a flux-switching and a switched reluctance drive

    Page(s): 826 - 834
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (999 KB) |  | HTML iconHTML  

    This paper describes the results of a comparison between the acoustic noise produced by a two-phase switched reluctance drive and a flux-switching motor and drive. For the comparison two external rotor machines were constructed from identical mechanical parts, and the same lamination stacks. Test results show that there is over 2 dB less acoustic noise from the flux-switching topology relative to the equivalent two-phase switched reluctance machine. Finite-element analysis is used to calculate the radial force profiles of the two motors during normal rotation and it is shown that further analysis of this data provides supporting evidence to the measured data and confirms the experimental results. The improved acoustic noise and vibration characteristics, coupled with the dramatic simplification of the power converter offered by the flux-switching drive makes it a very attractive low-cost low-acoustic-noise variable-speed drive. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An online stator winding resistance estimation technique for temperature monitoring of line-connected induction machines

    Page(s): 685 - 694
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (682 KB) |  | HTML iconHTML  

    A new technique for stator-resistance (Rs)-based thermal monitoring of small line-connected induction machines is proposed in this paper. A simple device is developed for injecting a small DC signal into line-connected induction machines for estimation of Rs. The proposed DC injection device is capable of intermittently injecting a controllable DC bias into the motor with very low power dissipation. Experimental results under motor startup, load variation, and abnormal cooling conditions verify that the proposed technique provides an accurate estimate of Rs that is capable of responding to the changes in the motor thermal characteristics, resulting in reliable thermal protection. The proposed technique is a very practical method for thermal protection of small line-connected induction machines that can be implemented with low cost in a motor condition monitoring system. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Evaluation of acoustic noise and mode frequencies with design variations of switched reluctance machines

    Page(s): 695 - 703
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (897 KB)  

    The stator mode frequency, as well as the intensity of acoustic noise generated by magnetic radial force, is related to the geometry, configuration, and material properties of the switched reluctance machine (SRM). Two different four-phase 8/6 SRMs with similar specifications, torque-speed requirements, and envelope dimensions have been designed and built for experiments related to noise intensity and stator mode frequencies. One of these two SRMs, labeled as low-noise SRM is designed following the low-noise design guidelines. The other one, labeled as conventional SRM is designed following the conventional design methodology. The mode frequencies and noise pressure levels for both the SRMs have been calculated using the analytical models. Acoustic-noise data collected from a test bench are analyzed to correlate the experimental and theoretical results. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Installation of an integrated turbine-generator control system for a pulp mill

    Page(s): 899 - 909
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1107 KB) |  | HTML iconHTML  

    A British Columbian pulp mill had experienced the "spiral of death" many times when the turbine-generator controls were unable to survive the loss of utility tie-line connections. The mill has two high-efficiency rotary turbine-generator units rated 32.2 MVA each and a heat sink capable of generating 47 MW, approximately 87% of the mill power needs, though only 44 MW was being produced. The mill believed that with a load rejection strategy the mill had the potential to continue operation after the loss of a utility tie. In order to ride through the loss of the utility and to fully utilize the process heat sink, the mill needed to replace the 1960s-era turbine-generator control system supplied by the turbine-generator original equipment manufacturer. A triple modular redundant control system for each unit was installed. These systems integrate turbine governor controls and generator excitation control system in a single digital control. The systems are connected in order to jointly coordinate dispatch of real and reactive power demands and achieve load control for the mill. In a staged test, the mill was able to survive the loss of a utility tie-line, and has increased total generation. The new system completely automates the startup, loading, and synchronizing of both generators. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of the neutral conductor current in a three-phase supplied network with nonlinear single-phase loads

    Page(s): 587 - 593
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (966 KB) |  | HTML iconHTML  

    This paper describes what factors (i.e., load and supply) have an important effect on the neutral conductor current. It is shown that an asymmetry up to 10° or an unbalance of 10% in the power supply has only a minor effect on the RMS value of the neutral conductor current. An unbalance in load conditions increases the neutral conductor current. Harmonics in the power supply voltage highly affect the RMS value of the neutral conductor current. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A sensorless, stable V/f control method for permanent-magnet synchronous motor drives

    Page(s): 783 - 791
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (644 KB) |  | HTML iconHTML  

    When permanent-magnet synchronous motors (PMSMs) are used for pump and fan applications, V/f control methods can be used to control them. The problem with open-loop V/f control of PMSMs without having damper windings in the rotor is the inherent instability after exceeding a certain applied frequency. In this paper, a new V/f control method is proposed for motor drives for stable operation in a wide frequency range. The magnitude of the voltage is controlled in order to maintain a constant stator flux linkage in the PMSM. The applied frequency is modulated proportional to the input power perturbations to stabilize the drive for a wide frequency range. No position sensor is required to implement this stabilizing technique. The small-signal analysis and the experimental results confirm the effectiveness of this stabilizing technique. The experimental results also indicate the satisfactory performance of the drive for pump and fan applications. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sensorless rotor position estimation of an interior permanent-magnet motor from initial states

    Page(s): 761 - 767
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (666 KB) |  | HTML iconHTML  

    This paper describes a torque, speed, or position control method at standstill and low speed in the interior permanent-magnet motor (IPMM) drive system without any rotational transducer. While IPMMs have originally magnetic saliency, it varies according to the load conditions and the control performance can be easily degraded. In this paper, the saliency or impedance difference is used as the conventional methods and, nevertheless, in order to amplify the difference containing the information of the rotor angle and to maintain a reasonable performance under any load condition a high-frequency injection scheme is proposed. A speed and position estimation scheme based on the characteristics of the high-frequency impedance is proposed. The scheme extracts the high-frequency impedance components related to the rotor position. An initial angle estimation scheme for starting from an arbitrary rotor position is also proposed. It can distinguish the north magnetic pole position from the south one in several decade milliseconds. The proposed scheme enables position control of a transducerless or position-sensorless IPMM. The experimental results clarify the satisfactory operation of the proposed position control algorithm under any load condition. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Inter-bar currents in induction machines

    Page(s): 677 - 684
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (469 KB) |  | HTML iconHTML  

    This paper presents a simple but effective model for predicting the effects of inter-bar rotor current on the performance of a three-phase squirrel-cage induction motor. The model takes the form of a matrix that is solved in order to obtain values for the rotor resistance and reactance parameters in the standard per-phase equivalent circuit. The model is verified by tests on an induction motor with modified rotors (either one or two missing end-rings). The inter-bar resistance is also measured for the test-motor rotor and the results put forward with a discussion of the procedure. Good correlation is found between the predicted and experimental results. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Selection criteria of induction machines for speed-sensorless drive applications

    Page(s): 704 - 712
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (596 KB) |  | HTML iconHTML  

    Induction motors, both three and single phase, are used extensively for adjustable-speed drives' applications. These machines are structurally very robust and are a primary source of motive power and speed control where DC machines cannot be used. For closed-loop control of these machines, sensorless speed estimation is usually preferred. Among the current estimation techniques available for speed-sensorless induction motor drives, speed measurement based on rotor-slot-related harmonic detection in machine line current happens to be a prominent one. While these harmonics can be strong in certain kinds of machines, some other machines may exhibit very weak rotor slot harmonics that can be obscured by noise. Skewing, slot shapes and types, structural unbalances, etc., also have a prominent effect on the detectability of these harmonics. This paper attempts to investigate this problem based on the interaction of pole pairs, number of rotor bars, and stator winding. Although the analysis and experimental results have been mainly provided for three-phase squirrel-cage induction motors, single-phase and slip-ring induction motors have also been addressed. Further, it has been shown that eccentricity-related fault detection could also be easily accommodated with this kind of speed detection technique at no or negligible extra cost when certain motors are selected. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Digital field-oriented control for dual three-phase induction motor drives

    Page(s): 752 - 760
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (573 KB) |  | HTML iconHTML  

    A direct rotor-field-oriented control of a dual-three phase induction motor drive is described in this paper. The induction machine has two sets of stator three-phase windings spatially shifted by 30 electrical degrees. The stator windings are fed by a current-controlled pulsewidth-modulation (PWM) six-phase voltage-source inverter. Three key issues are discussed: (1) the machine dynamic model is based on the vector space decomposition theory; (2) the PWM strategy uses the double zero-sequence injection modulation technique which gives good results with low computational and hardware requirements; and (3) to eliminate the inherent asymmetries of the drive power section, a new current control scheme is proposed. Experimental results are presented for a 10-kW dual three-phase induction motor drive prototype. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • TMP optimization using multivariate analysis

    Page(s): 893 - 898
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1128 KB) |  | HTML iconHTML  

    A new thermo-mechanical pulp refiner installation was optimized for quality parameters. The mill was state of the art and, despite having the most modern process equipment, was not able to meet the quality requirements without undergoing a deliberate optimization effort. The quality improvement results were not obtained from a single solution but by incremental changes and methodical testing. A variety of techniques were used to achieve the results in a timely and cost-effective manner. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High-performance current-sensorless drive for PMSM and SynRM with only low-resolution position sensor

    Page(s): 792 - 801
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (730 KB) |  | HTML iconHTML  

    This paper proposes the current-sensorless drive system with only low-resolution position sensor in order to simplify the synchronous motor drive system. The high-performance current vector control can be achieved in the proposed drive system, where the current sensors are eliminated but the simulated currents based on motor model are used for current control. The low-resolution position sensor, which has a resolution of only 60 electrical degrees, is used instead of a conventional high-resolution position sensor, and the position information with higher resolution is estimated. The steady-state performance and dynamic performance are examined by several drive tests with respect to the interior permanent-magnet synchronous motor and the synchronous reluctance motor. The effectiveness of the proposed drive system is clarified from several experimental results. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design and implementation of a series voltage sag compensator under practical utility conditions

    Page(s): 844 - 853
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (815 KB) |  | HTML iconHTML  

    Voltage sags have become one of the most important power quality concerns in recent years. According to survey results across the US, voltage sags and short-duration power outages account for 92% of power quality problems encountered by industrial customers. Voltage sags often cause undervoltage faults in various sensitive loads and subsequently interrupt the manufacturing processes. Such interruptions often inflict severe losses for industries. In Taiwan, ROC, most high-tech manufacturers use uninterruptible power supplies to avoid interruptions, but the cost effectiveness of such an approach remains unclear. As the utility grid continues to improve the reliability of electric power, the inverter-based voltage sag compensator has become a viable solution to prevent production interruptions resulting from voltage sags. The existing sag compensation systems accomplish a fast response within a small fraction of a fundamental cycle by tracking the line voltages closely, and switch on the compensator whenever the voltage waveforms deviate from the normal values. However, the utility voltages often contain transient spikes with amplitudes up to 200% resulting from switching of power-factor-correction capacitors, circuit breakers switchings, lightning strikes, and so on. Such transient disturbances may trigger the sag compensator into operation if its controller is very sensitive. The switching frequency of the sag compensator inverter is inadequate to compensate the narrow pulses of voltage spikes. Furthermore, the power semiconductor devices (like insulated gate bipolar transistors) of the inverter may also be damaged due to overvoltage by the surges. In this paper, a brief overview of power quality issues of a high-tech industry park in Taiwan is provided to validate the need for ride-through technologies. A synchronous-reference-frame-based controller for the inverter-based voltage sag compensator is also presented. A sag detection mechanism is included in the controller for correct and prompt identification of voltage sags. Disturbances like voltage spikes are attenuated to avoid any false triggering of the compensator. The overall system responds to voltage sags and restores the voltage back to balanced 1.0 pu for critical loads within one-eighth to one-fourt- h of a cycle, which meet the requirement of industry standards like the SEMI-F47 standard. Simulation and laboratory test results are presented to verify the functionality of the proposed system. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Conventional and recommended arc power and energy calculations and arc damage assessment

    Page(s): 594 - 599
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (426 KB) |  | HTML iconHTML  

    The costs associated with fires initiated by arcing faults depend on the extent of the damage. In some cases, costs have exceeded $100 000 000. The personal losses associated with a serious injury or fatality are incalculable. When an arcing fault occurs, qualified in-house personnel and/or professional consultants try to determine the factors involved in the fault's initiation. Investigators also serve as expert witnesses in any pending lawsuits related to the accident. In fact, the growing interest in accident investigation has led to the establishment of an IEEE workgroup in forensics. Even with sophisticated techniques like scanning electron microscopes used to provide magnified photographs of arc damage, only a limited amount of applicable technical information on arcing faults exists for reference. Much of the engineering reference information on calculating arc currents and assessing arc damage is 25-50 years old. Recent papers by the authors discussed calculating arc currents. This paper presents a method to determine the power released by a single-phase-to-ground arc and provides graphs for quick reference. Commonly used methods for calculating arc power and energy and quantifying damage are also discussed. The recommended and conventional methods are used to determine arc energy and to identify the damage threshold in a typical system and the results are compared. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adjustable-speed single-phase IM drive with reduced number of switches

    Page(s): 819 - 825
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (544 KB) |  | HTML iconHTML  

    A novel low-cost single-phase induction machine drive containing only two controlled solid-state switches is presented. The drive is intended for heating, ventilation, and air conditioning or a similar type of application requiring variable-speed operation with a fan-type load characteristic. An experimental drive based on the proposed setup has been built to verify its practical viability and to analyze its properties. The paper presents the results obtained from an investigation into this new topology and discusses the properties and characteristics of the drive for the entire speed range from 0 to 60 Hz. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Advanced modeling techniques for dynamic feeder rating systems

    Page(s): 619 - 626
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (791 KB) |  | HTML iconHTML  

    This paper describes the technical details of an advanced model for use in real-time cable rating systems. Real-time cable rating systems perform calculations of steady-state and emergency cable ratings in real time; several such systems have been installed to maximize asset utilization without compromising cable system reliability. An example of a complex tunnel installation, featuring four self-contained fluid-filled and cross-linked polyethylene cable circuits, is described in detail, highlighting key issues of relevance to real-time systems. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A medium-voltage transformerless AC/DC power conversion system consisting of a diode rectifier and a shunt hybrid filter

    Page(s): 874 - 882
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (637 KB) |  | HTML iconHTML  

    This paper proposes a 3.3-kV transformerless AC-to-DC power conversion system consisting of a three-phase six-pulse diode rectifier and a shunt hybrid filter. The hybrid filter is formed by a single tuned LC filter per phase and a small-rated three-phase active filter, which are directly connected in series without any matching transformer. The required rating of the active filter is much smaller than that of a conventional standalone active filter be. In addition, no additional switching-ripple filter is required for the hybrid filter because the LC filter functions not only as a harmonic filter tuned at the seventh harmonic frequency but also as a switching-ripple filter around 10 kHz. Experimental results obtained from a 200-V 5-kW laboratory system and simulation results of a 3.3-kV 300-kW system confirm the validity and effectiveness of the system. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of axial eddy-current couplers

    Page(s): 725 - 733
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1400 KB) |  | HTML iconHTML  

    This paper presents different analytical and numerical approaches devoted to the analysis and design of axial eddy-current couplers. The main part of the work regards a pure analytical procedure based on variable separation method (VSM). This methodology requires a preliminary linearization of the structure to reduce the three-dimensional (3-D) problem to a two-dimensional (2-D) one. The 2-D analytical model is compared with 2-D finite-element (FE) analysis and the comparison shows the reliability of the proposed model. The analytical procedure is then largely employed for a detailed parametric study to give useful information to the designer of eddy-current couplers. A double-sided stator with permanent magnets and single and multilayer conductive disk rotors are considered. In order to take into account 3-D effects, two different models are proposed. In the first one the VSM is coupled to a 2-D FE model; in a second model a closed analytical formula allows us to consider 3-D effects. All the models are validated with experimental results and with 3-D FE analysis. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • EKF-based sensorless IPM synchronous motor drive for flux-weakening applications

    Page(s): 768 - 775
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (511 KB) |  | HTML iconHTML  

    This paper deals with the experimental realization of a sensorless interior permanent-magnet synchronous motor drive. The motor has been specifically designed to get a wide flux-weakening region, to minimize the drive power rating in spite of a wide speed range. Position and angular speed of the rotor are obtained through an extended Kalman filter. The estimation algorithm requires neither the knowledge of the mechanical parameters, nor the initial rotor position. In the paper, particular emphasis is placed on control algorithms, which are complicated by the motor anisotropy and which have been specifically studied to enhance the overall system performance. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Robust output-feedback H control with a nonlinear observer for a two-mass system

    Page(s): 637 - 644
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (539 KB) |  | HTML iconHTML  

    In this paper, a positioning control of a nonlinear elastically coupled two-mass system is presented. Structures of two-mass systems can often be found, e.g., in robotics or machine tools. The contained mechanical parts, like gears and shafts, can lead to limit cycles and stick-slip effects. In order to avoid the unwanted effects an H control design is used for the system. Parameter uncertainties and elastic torsion are also taken into account in the control synthesis. If the measurability is limited, so that only the system output can be measured, a nonlinear observer is used. The standard output-feedback H control structure needs some basic changes for this nonlinear observer. The result is an H control, which can handle the nonlinear system, even if only the system output can be measured. The control shows good dynamics, robustness, and can handle disturbances. Measured results are shown in this paper. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Stator winding turn-fault detection for closed-loop induction motor drives

    Page(s): 720 - 724
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (298 KB) |  | HTML iconHTML  

    Sensorless diagnostics for line-connected machines is based on extracting fault signatures from the spectrum of the line currents. However, for closed-loop drives, the power supply is a regulated current source and, hence, the motor voltages must also be monitored for fault information. In this paper, a previously proposed neural network scheme for turn-fault detection in line-connected induction machines is extended to inverter-fed machines, with special emphasis on closed-loop drives. Experimental results are provided to illustrate that the method is impervious to machine and instrumentation nonidealities, and that it requires lesser data memory and computation requirements than existing schemes, which are based on data lookup tables. 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