# IEEE Transactions on Industrial Electronics and Control Instrumentation

Includes the top 50 most frequently accessed documents for this publication according to the usage statistics for the month of

• ### An Overview of Electric Motors for Space Applications

Publication Year: 1981, Page(s):260 - 265
Cited by:  Papers (12)
| | PDF (2093 KB)

Spacecrafts rely on electric motors for Important functions such as attitude control, deployment mechanisms, throttle valve control, etc. Electric motors for space applications must have long life and high reliability, under high vacuum, radiation, and wide operating temperature environments. Although various types of motors are available, all of them are not suitable. Limitations of ac synchronou... View full abstract»

• ### A Sample-Hold Circuit Using MOSFETs

Publication Year: 1974, Page(s):262 - 263
| | PDF (366 KB)

An analysis and design of a sample-hold circuit is presented and in addition, details of a working circuit. MOSFETs offer the possibility of a higher quality sample-hold circuit than has previously been available because of low leakage currents along with high switching speed and low on'' resistance. View full abstract»

• ### Speed Control of D. C. Motor Using Teyristor Dual Converter

Publication Year: 1976, Page(s):391 - 399
Cited by:  Papers (6)
| | PDF (3695 KB)

The paper describes the design, construction and testing of a closed-loop system for the speed control of a separately excited d.c. motor fed from a dual converter. The dual converter makes possible regenerative braking and reversal of direction of rotation. There is only one firing unit and the firing pulses are diverted to the appropriate converter by a master controller. There are three control... View full abstract»

• ### Pulse-Width Modulation DC Motor Control

Publication Year: 1965, Page(s):24 - 28
Cited by:  Papers (5)
| | PDF (940 KB)

In order to control the speed of a dc series field motor at different required torque levels, it is necessary to adjust the voltage applied to the motor. For any particular constant voltage the motor speed is determined solely by the torque requirements and top speed is reached under minimum torque conditions. When a series motor is used as a traction drive for vehicles, it is desirable to control... View full abstract»

• ### Comparison of Multiple-Output DC-DC Converters Using Cross Regulation

Publication Year: 1980, Page(s):176 - 189
Cited by:  Papers (39)  |  Patents (2)
| | PDF (2955 KB)

A new multiple-output dc-dc converter is analyzed, in which the cross regulation is performed by the energy-storage reactor as well as the transformer. The steady-state and the dynamic characteristics of this converter are compared both theoretically and experimentally with those of the conventional one composed of the step-up-down type circuit. As the results of comparative analysis, it is reveal... View full abstract»

• ### Automatic Voltage Regulation of DC Shunt Generators

Publication Year: 1973, Page(s):58 - 59
Cited by:  Papers (3)
| | PDF (342 KB)

In a dc shunt generator, as the load increases the terminal voltage falls, giving a drooping characteristic. The regulation of voltage involves the adjustment of field excitation. A simple method of voltage regulation by automatic adjustment of field excitation making use of transistor circuitry is discussed. The added advantage of this method is that by the simple adjustment of circuit parameters... View full abstract»

• ### Application of RF Circuit Design Principles to Distributed Power Converters

Publication Year: 1980, Page(s):156 - 164
Cited by:  Papers (75)  |  Patents (9)
| | PDF (5875 KB)

The application of RF circuit design principles to high-frequency power converters is described. Compared to conventional converter design, emphasis is placed on obtaining sinusoidal-type waveforms (instead of rectangular-type waveforms) to minimize device switching time requirements and alleviate transforming requirements. A 25-W 48-V to 5-V dc-to-dc converter design using a 5-MHz switching frequ... View full abstract»

• ### Low Order Rational Approximations To The Delay Operator

Publication Year: 1977, Page(s):61 - 65
Cited by:  Papers (3)
| | PDF (1933 KB)

Consideration is given to three rational approximants to the delay operator including the Pade approximants. The Pade approximants, in general, give rise to unstable system performance and, hence, are not satisfactory. The second approximant arises from a direct solution of systems with delay. The third is of the form (1 + sT)N. Low-order approximants of either of the later two types are ge... View full abstract»

• ### Firing Circuit for Three-Phase Thyristor-Bridge Rectifier

Publication Year: 1978, Page(s):45 - 49
Cited by:  Papers (17)
| | PDF (1658 KB)

Existing firing schemes for the firing of three-phase SCR bridge rectifiers used for industrial applications employ equidistant firing pulses. Mostly they consist of six identical phase control circuits. In this paper a compact scheme using minimum integrated circuit components is described. It has a fast response for triggering angle correction and gives a full range control of voltage. View full abstract»

• ### Motor Thermal Protection by Continuous Monitoring of Winding Resistance

Publication Year: 1980, Page(s):137 - 141
Cited by:  Papers (50)  |  Patents (1)
| | PDF (1230 KB)

Simple practical techniques which sense ac line current afford protection of motor windings for many applications. A more complete protection system is described which continuously monitors average winding resistance and hence temperature by means of an easily applied dc injection technique. No additional motor connections are required. View full abstract»

• ### Critical Inductance and Controlled Rectifiers

Publication Year: 1965, Page(s):34 - 37
Cited by:  Papers (3)
| | PDF (663 KB)

The design of an inductive input filter for a rectifier requires a certain minimum value of inductance in order to have a continuous current in the inductor and, therefore, maintain good regulation. This value is known as the critical inductance. Overbeck determined the critical inductance as a function of firing angle in a controlled rectifier. In this paper we add a diode to the filter which pro... View full abstract»

• ### Calculation of Self-Heating Current for a Resistance Wire Temperature Sensor

Publication Year: 1969, Page(s):99 - 102
| | PDF (638 KB)

In many control or instrumentation circuits, a resistance wire temperature sensor is often used to measure the environmental temperature. Because the sensor current itself can change the resistance of the sensor, it is essential that the current required in the sensing circuitry does not cause excessive heating of the sensing element. The power loss caused by any current in the resistance sensor w... View full abstract»

• ### Analysis of a Forced Commutation Circuit for Design of a Class or Thyristor Inverters

Publication Year: 1973, Page(s):125 - 129
Cited by:  Papers (1)
| | PDF (528 KB)

The literature contains a variety of inverter circuits with forced commutation. In general, the auxiliary circuit for switching off the load current carrying thyristors is composed of a number of energy storage components and semiconductor switches which are affected by losses. These circuits demonstrate specific advantages under certain conditions. The analysis of a forced commutated inverter wit... View full abstract»

• ### Modeling of DC Motors for Control Applications

Publication Year: 1974, Page(s):84 - 88
Cited by:  Papers (15)
| | PDF (710 KB)

Three different mathematical models of an armature-controlled dc motor are considered: (i) a precise nonlinear model, (ii) a piecewise linear model, and (iii) a second-order linear model. Experimental results are presented comparing the various models, and a range of applications for each is suggested. View full abstract»

• ### A Method of Resonant Current Pulse Modulation for Power Converters

Publication Year: 1970, Page(s):209 - 221
Cited by:  Papers (63)  |  Patents (11)
| | PDF (2697 KB)

A nonlinear, active network that transforms the voltage waveform of a unipolar source of energy is presented. This network consists of ideally lossless elements such as inductors, capacitors, and on-off switches. Control is obtained by variation of the mode of switch operation. A circuit philosophy is applied which is adapted to the characteristics of switch operation and confines the stresses imp... View full abstract»

• ### Constant Voltage, Current, and Power Circuits: A Network Theoretic Approach

Publication Year: 1981, Page(s):364 - 369
Cited by:  Papers (1)
| | PDF (1375 KB)

A network theoretic approach is employed to derive a number of circuits for i) constant load current, ii) constant load voltage, and iii) constant magnitude input current, when the load varies over a wide range. It is shown that a circuit delivering constant power to a varying load does not exist, and that the range of load, over which the power does not fall below a specified fraction of the maxi... View full abstract»

• ### Digital Speed Control of a DC Motor With Phase-Locked Loop Regulation

Publication Year: 1978, Page(s):10 - 13
Cited by:  Papers (17)
| | PDF (2368 KB)

This paper describes a digital speed control method of a rectifier-fed separately excited dc motor incorporating phase-locked loop technique. The converter uses cosine-wave crossing method, the digital version of which is generated by programming a set of read-only-memories (ROM). The smooth control of firing angle in the range of 0Â° to 180Â° permits motoring and regeneration in the full range, a... View full abstract»

• ### A Study of the Applications of Analog Computers

Publication Year: 1967, Page(s):1 - 7
Cited by:  Papers (2)
| | PDF (1224 KB)

An electronic analog computer is a tool for solving mathematical differential equations. The basis for the use of such a computer in the simulation of many scientific and engineering problems is the possibility of characterizing these situations as formal mathematical systems by using differential equations. In this paper, following a brief description of the computing elements, the applications o... View full abstract»

• ### A Static Scherbius Drive with Chopper

Publication Year: 1977, Page(s):24 - 29
| | PDF (3973 KB)

In this paper, a new scheme for static Scherbius drives, which results in improvement of power factor of the drive, has been proposed. It has a chopper inserted between the rectifier and inverter modules. The design considerations of such a scheme have been discussed in detail. The experimental results on a Scherbius drive using the proposed scheme have also been presented in order to bring out it... View full abstract»

• ### A Zero - Speed Pulse Tachometer

Publication Year: 1970, Page(s):292 - 296
Cited by:  Patents (1)
| | PDF (1811 KB)

This paper describes a new pulse tachometer system which combines the environmental virtues of the reluctance pickup with an independence from speed generally associated with more complex and fragile types. The mechanical properties of the sensing head permit considerable freedom in the manner of its installation; in the application described it is mounted in the end-bell of a self-ventilated trac... View full abstract»

• ### Performance Improvement in Microprocessor-Based Digital PLL Speed Control System

Publication Year: 1981, Page(s):56 - 61
Cited by:  Papers (9)  |  Patents (1)
| | PDF (1123 KB)

A microprocessor-based digital PLL speed control system for motor drives is discussed on its load characteristics, stability, and speed control accuracy. The digital and hybrid simulations as well as the Z transform are used to analyze these items of discussion. As the results of the analysis, two compensating methods, that is, the current compensator and the speed feedback loop are proposed for e... View full abstract»

• ### An Adaptive Low Pass Filter

Publication Year: 1975, Page(s):47 - 48
| | PDF (543 KB)

A low pass filter circuit for periodic functions is proposed which has a variable break frequency. The break frequency is a function of the fundamental frequency of the input waveform. Multiple pole networks may be made by cascading sections of the single pole filter circuit. Adaptive circuit operation depends on principles of feedback, filtering and harmonic content of periodic functions. View full abstract»

• ### Semiconductor Strain-Gauge Applications for Flight-Control Systems

Publication Year: 1972, Page(s):56 - 61
| | PDF (6469 KB)

The major design features and performance characteristics of some components utilizing semiconductor strain gauges for flight-control-system applications are presented. Some of the practical considerations involved in the implementation of these devices to control applications are described. Techniques for designing for a long useful life are also presented, as well as performance data and environ... View full abstract»

• ### A Phase-Locked Loop Motor Control System

Publication Year: 1975, Page(s):487 - 490
Cited by:  Papers (31)  |  Patents (5)
| | PDF (1466 KB)

This paper describes a motor control circuit for a dc motor using phase-locked loop techniques. The purpose of such a control loop is to provide very accurate speed control, repeatability, and synchronization capability. View full abstract»

• ### Speed Control Of Three-Phase Induction Motor by Stator Voltage Control

Publication Year: 1975, Page(s):172 - 174
Cited by:  Papers (1)
| | PDF (890 KB)

A theoretical background for the induction motor input current variation due to variation in speed is presented and the theoretical result is compared with the experimental observations, when the motor speed is varied by variation of input voltage. A six thyristor balaced ciruit is proposed for speed control and its performance is compared with that of sine wave Variac voltage control. View full abstract»

• ### A Digital Method for DC Motor Speed Control

Publication Year: 1976, Page(s):44 - 46
Cited by:  Papers (18)
| | PDF (612 KB)

A motor speed controller is presented using digital techniques to measure, compare, and correct motor speed. In the prototype model, the range of speed control is approximately 200 rpm to 3000 rpm. The digital approach eliminates measurement nonlinearity and makes the speed setting exactly reproducible. The prototype's steady-state error is less that 0.2% of maximum speed, and it is shown how a di... View full abstract»

• ### Transient Thermal Response Measurements of Power Transistors

Publication Year: 1975, Page(s):134 - 141
Cited by:  Papers (42)
| | PDF (3042 KB)

Differences between the measured thermal impedance of power transistors when determined by the pulsed heating curve and cooling curve techniques are discussed. These differences are shown to result primarily because the power density distributions of these devices change as devicesheat; as a result of these changes the heating curve and the cooling curve are not conjugate. It is shown that the coo... View full abstract»

• ### Nonlinear Integrator With Zero Phase Shift

Publication Year: 1977, Page(s):150 - 152
Cited by:  Papers (4)
| | PDF (3684 KB)

In the present paper a nonlinear integrator is introduced which produces zero phase shift in comparison with -90Â° phase shift of linear integrator and the phase of -38Â° of nonlinear integrator introduced by Clegg [1]. The proposed nonlinear integrator is a combination of a 90Â° phase lead nonlinear network and a linear integrator. Synthesis and operation of the non-linear integrator as well as p... View full abstract»

• ### Determination of Leakage Permeance for Permanentic Generators Used in Control Applications

Publication Year: 1976, Page(s):79 - 82
| | PDF (826 KB)

In the design of permanentic machines for control applications the calculation of leakage permeance can be determined by considering the contribution from the various leakage paths. The method of determining leakage permeance is described in some detail and its use in the optimum design of permanent magnet machines is indicated. View full abstract»

• ### A Simplified Dual Cycloconverter

Publication Year: 1981, Page(s):249 - 252
Cited by:  Papers (4)  |  Patents (2)
| | PDF (1924 KB)

This work explains the concept of a simple cycloconverter. It is proved that one controlled rectifier supplying a bridge inverter performs similarly to a conventional cycloconverter if the converter output-voltage modulation and the inverter switching sequency are synchronized. While the required firing system remains almost unchanged, the number of power solid-state components is significantly re... View full abstract»

• ### Transient Analysis of a DC Series Motor (Linear Versus Nonlinear Models)

Publication Year: 1981, Page(s):120 - 125
Cited by:  Papers (6)
| | PDF (1568 KB)

The paper deals with the transient analysis of a dc series motor. The analysis includes starting, load changing, and braking. Three models were considered: linear, nonlinear, and nonlinear with armature reaction. The results show a big difference in the transient response for these models and indicate the necessity of using a nonlinear model for accurate simulation of the series motor. The analysi... View full abstract»

• ### A Non-Linear Electronic Compensator for Automatic Control Systems

Publication Year: 1975, Page(s):201 - 208
Cited by:  Papers (7)
| | PDF (2565 KB)

The technique for the synthesis of the dual-input describing function (DIDF) is introduced here and the construction of a non-linear electronic compensator (N-L.E.C.), based on this techniques, is proposed. The above non-linear network is used to compensate . linear and non-linear systems for instability, limit Cycles, speed of response and the static accuracy. Four practical examples are given at... View full abstract»

• ### Contribution to the fast warm-up and close temperature control oven theory

Publication Year: 1966, Page(s):83 - 87
| | PDF (802 KB)

The control loop of a temperature control system is analyzed in terms of an electrical equivalent; and a general theory, applicable to control design of both ON-OFF and PROPORTIONAL types, is developed. PROPORTIONAL type of control for fast warm-up is, for the first time, analyzed, and the advantages over thermostatic ON-OFF types are shown. The peculiar characteristics of the component type oven ... View full abstract»

• ### Analysis and Simplified Representation of a Current Source Inverter Induction Motor Drive

Publication Year: 1980, Page(s):284 - 290
| | PDF (1426 KB)

A simplified analytical model for a rectifier/current source inverter (CSI) induction motor drive is developed and verified by comparing computer results with those obtained for the same system represented in detail. The simplified model, which represents system behavior in the synchronous reference frame, neglects converter harmonics but includes an approximation of the voltage spikes produced du... View full abstract»

• ### Current Control Modulators: General Theory on Specific Designs

Publication Year: 1981, Page(s):292 - 307
Cited by:  Papers (17)
| | PDF (7436 KB)

High power distribution in continuous or pulsed mode on board application satellites has drastically complicated the design of power conditioning regulators by requiring the reliable operation with brilliant dynamic behavior of complex modular structures to satisfy their powerful loads. Current control modulators satisfy these requirements by the energy control capability. The 50-percent duty rati... View full abstract»

• ### Constant Pressure Fluid Pump Adaptive Control System

Publication Year: 1977, Page(s):313 - 316
| | PDF (1887 KB)

The fluid pump with a constant output pressure control loop is discussed with respect to its loop gain dependence on fluid load. A new adaptive control system block diagram is presented along with an inexpensive 80 db gain range adaptive control system. View full abstract»

• ### A Simple Digitally Controlled Three-Phase PWM Inverter using Turn-Off Thyristors

Publication Year: 1981, Page(s):256 - 259
| | PDF (1502 KB)

A new pulsewidth-modulation method for a three-phase inverter is proposed. The method offers the advantages of a much simpler control logic circuitry and relatively high-quality waveforms of the output voltage. The use of high-power turn-off thyristors allows simplification of the power circuit construction and a reduction in size. The experiments using turn-off thyristors with a rating of 1200 V ... View full abstract»

• ### Half-Bridge Transistor Inverter for DC Power Conversion

Publication Year: 1974, Page(s):249 - 253
Cited by:  Papers (5)  |  Patents (2)
| | PDF (733 KB)

In the design of push-pull type or bridge type inverters for dc to dc or dc to ac power conversion, one serious problem arises as a result of the difference in saturation voltages and unsymmetrical switching times of the power transistors. A slight difference in one of these parameters will put different volt-seconds on the power transformer primary in the two half cycles and drive the transformer... View full abstract»

• ### Optimum DC Dynamic Braking Control of an Induction Motor Using Thyristor Chopper Controlled Resistance

Publication Year: 1974, Page(s):60 - 65
Cited by:  Papers (8)
| | PDF (1000 KB)

The optimum dc dynamic braking control here implies that, at all the speeds, the motor is operated at peak torque point. This can be achieved by controlling the rotor resistance of an induction motor such that the peak torque occurs at the speed at which the motor is running. The optimum control permits the stopping of a load in a minimum time with minimum heating of the motor and therefore is use... View full abstract»

• ### Pulse Width Modulated Inverters for Uninterruptible AC Power Systems Applications

Publication Year: 1970, Page(s):339 - 345
| | PDF (1432 KB)

This paper describes a PWM Static Inverter as used in Uninterruptible Power Systems having transfer times of 1/4 cycle or less. Such performance is extremely important in critical AC power applications for on-line process controls and computers where longer duration outages would result in very costly and extensive down time. A static switching bypass system is outlined, a comparison of inverter t... View full abstract»

• ### Stabilization of an Unstable Plant by Pole Allocation, Observer Theory, and Active Networks

Publication Year: 1981, Page(s):220 - 224
Cited by:  Papers (3)
| | PDF (760 KB)

This paper considers the design and implementation of a controller to stabilize a single-input single-output unstable plant using pole-assignment technique and observer theory. First, assuming that the state variables are available for feedback, the pole-assignment technique is used to determine the feedback gains required to achieve a desired set of closed-loop poles. This assumption is relaxed a... View full abstract»

• ### Microprocessor Control of Position or Speed of an SCR DC Motor Drive

Publication Year: 1980, Page(s):228 - 234
Cited by:  Papers (10)
| | PDF (1415 KB)

In silicon-controlled rectifier (SCR) dc motor drive control, it is desirable for a microprocessor to perform both the control law computations and the logical functions of SCR firing. However, because of their limited real-time capabilities, present-day microprocessors cannot accommodate excessively lengthy control algorithms. This paper presents a method, suitable for microprocessor implementati... View full abstract»

• ### Necessary and Sufficient Conditions for the Stability of Buck-Type Switched-Mode Power Supplies

Publication Year: 1981, Page(s):229 - 234
| | PDF (1140 KB)

Necessary and sufficient conditions are derived for the small-signal stability of forward (buck-type) switched-mode power supplies with a constant switching frequency in the continuous conduction mode. It is shown that the maximum allowable gain of the error amplifier is a function of the modulation process, the duty cycle of the switch, and the filter elements of the supply. Under certain conditi... View full abstract»

• ### A Closed-Loop Control System for the Reduction of Reactive Power Required by Electronic Converters

Publication Year: 1976, Page(s):162 - 166
Cited by:  Papers (36)  |  Patents (4)
| | PDF (1345 KB)

A closed-loop control system to reduce the reactive power required by electronic converters is proposed. The instantaneous reactive power which consists of both displacement of fundamental current and harmonic distortion current is measured and compensated by a reactive power source connected parallel between the power lines and the converter. A combination of a dc choke and a forced-commutated in... View full abstract»

• ### A Comparison of the Smith Predictor and Optimal Design Approaches for Systems with Delay in the Control

Publication Year: 1977, Page(s):109 - 117
Cited by:  Papers (22)
| | PDF (2358 KB)

The relatively recent application of optimal control theory to the design of control systems for processes with delay has made available an alternative design approach to the classical Smith Predictor approach. Although the designs resulting from the two approaches have many features in common, there are also important differences, and neither the similarities or differences have been examined in ... View full abstract»

• ### A Microprocessor-Based Current Controller for SCR-DC Motor Drives

Publication Year: 1980, Page(s):169 - 176
Cited by:  Papers (10)  |  Patents (1)
| | PDF (1838 KB)

A new current controller for a three-phase full-wave silicon controlled rectifier (SCR) bridge, supplying a separately excited armature-controlled dc motor driving an inertial load is developed. The controller operates in two modes, one applicable when the motor armature current is continuous, the other when it is discontinuous. The current controller is then used in speed or position control of a... View full abstract»

• ### A Microcomputer-Controlled Testing System for Digital Integrated Circuits

Publication Year: 1980, Page(s):279 - 283
Cited by:  Papers (4)
| | PDF (1037 KB)

This paper describes a low-cost digital integrated circuit (IC) tester designed and implemented using the Intel 8080 microcomputer family. Test patterns are applied to each IC to be tested from a lookup table stored in memory, along with appropriate clock signals if needed. The resulting chip outputs are then examined for errors resulting from stuck-at conditions or other functional errors. The ha... View full abstract»

Publication Year: 1974, Page(s):215 - 221
Cited by:  Papers (1)
| | PDF (2319 KB)

The methods of handling small signals from multi-decade sensors are discussed. A simple, fast and accurate preprocessing amplification unit (PPU) with the capabilities of automatic gain switching is presented. The unit could be used in the analog channels of a computer based data acquisition and process control system. The use of such a unit with some of the analog sensors would increase the resol... View full abstract»

• ### An Improved Microwave Method of Moisture Content Measurement and Control

Publication Year: 1976, Page(s):364 - 370
Cited by:  Papers (59)  |  Patents (6)
| | PDF (3063 KB)

Relations between attenuation and phase shift of electromagnetic waves passing through a wet substance and weights of water and dry substance have been used for calculation of the real value of moisture content of the substance. The result appears to be independent of the denity of the substance, its layer thickness and flatness of its surface. Measuring set-up for continuous measurement requires ... View full abstract»

• ### Design of a Digital Loop for Numerical Control

Publication Year: 1978, Page(s):212 - 217
Cited by:  Papers (10)
| | PDF (1616 KB)

This paper describes a method for designing a digital loop for numerical control (NC) comprising an up-down counter, a digital-to-analog converter (DAC), a servo motor, and a digital encoder. The loop is analyzed and the open-loop gain is determined. The number of counter stages required for a given speed interval is also calculated. An example is presented to demonstrate the design procedure. View full abstract»

## Aims & Scope

This Transactions ceased production in 1981. The current retitled publication is IEEE Transactions on Industrial Electronics.

Full Aims & Scope