# IEEE Transactions on Industrial Electronics and Control Instrumentation

## Filter Results

Displaying Results 1 - 25 of 25
• ### A Simplified Dual Cycloconverter

Publication Year: 1981, Page(s):249 - 252
Cited by:  Papers (5)  |  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»

• ### Pulsewidth Modulation Inverter Drive with Fast Response to Frequency and Amplitude Controls

Publication Year: 1981, Page(s):252 - 255
| | PDF (1795 KB)

A pulsewidth modulation (PWM) inverter drive is presented, which uses an original parallel processing technique. The multiplication process of the voltage demand by the instantaneous value of the wave is achieved in time domain using a variable frequency clock. Optimum feedback is used to ensure the accuracy of the analog processing stage, with the result of a rapid and accurate response achieved ... 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»

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

Publication Year: 1981, Page(s):260 - 265
Cited by:  Papers (17)
| | 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»

• ### Reduction of the Voltage and Current Harmonics Introduced by a Single-Phase Triac AC Controller, by Means of Shunt Resistance

Publication Year: 1981, Page(s):266 - 272
Cited by:  Papers (2)
| | PDF (1388 KB)

This paper shows that the voltage and current harmonics introduced by a single-phase triac ac controller can be significantly reduced by shunting the triac with a fixed-value resistance. Theoretical results are given for a purely resistive load and a fixed RL load with a power factor of 0.7, to substantiate this claim. View full abstract»

• ### A Multikilowatt Polyphase AC/DC Converter with Reversible Power Flow and without Passive Low-Frequency Filters

Publication Year: 1981, Page(s):273 - 281
Cited by:  Papers (8)  |  Patents (2)
| | PDF (4161 KB)

An efficient ac-to-dc converter with reversible power flow, which embodies an active, low-frequency filter, is presented. A nondissipatively controlled, nonlinear resonant oscillator is used to extract electric energy directly from the phase pairs of the polyphase supply line and to generate a mixed amplitude-and frequency-modulated carrier. The demodulated carrier and the resulting 20-kHz pulse t... View full abstract»

• ### A Doublesided Cycloconverter

Publication Year: 1981, Page(s):282 - 291
Cited by:  Papers (22)  |  Patents (4)
| | PDF (2616 KB)

A power converter with reversible power flow, which transforms polyphase ac or dc power of one form and voltage level to ac or dc power of another form and voltage level, is presented. Use of a modulated high-frequency link between two sets of matrices of switches at the output terminals allows the application of active filtering processes and the elimination of all low-frequency filters and trans... 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»

• ### A Microprocessor-Controlled User-Interactive Information Dissemination System

Publication Year: 1981, Page(s):307 - 314
Cited by:  Papers (2)  |  Patents (1)
| | PDF (3109 KB)

A telephone dial access, user-interactive, information dissemination system is described which incorporates up to eleven tape recorders controlled by an Intel 8085 microprocessor. The system has a dial-in capability permitting the caller to select any one of ten messages he may wish to hear. In addition, all recorded messages are played to the caller as rate-altered or time compressed speech (rate... View full abstract»

• ### PWM Systems in Power Converters: An Extension of the Subharmonic'' Method

Publication Year: 1981, Page(s):315 - 322
Cited by:  Papers (24)  |  Patents (2)
| | PDF (2730 KB)

In this paper the extension of the subharmonic method for pulse-width modulation (PWM) systems, in the case in which the ratio between modulating and carrier wave amplitudes can be varied from 0 to ∞, is studied in an analytical way. This method allows us to obtain an inverter output waveform variable continuously from a nearly sinusoidal to a square wave and to increase somewhat the amplitude of ... View full abstract»

• ### Dynamic Responses of DC Chopper-Controlled Series Motor

Publication Year: 1981, Page(s):323 - 330
Cited by:  Papers (6)
| | PDF (1901 KB)

This paper uses a computer-based piece-wise linear technique to analyze the dynamic performances of an armature voltage-controlled chopper circuit with a low-pass input filter taking the account of nonlinearities such as the magnetic saturation and the product of variable terms. The performances in the transient conditions which occur in practical situations are predicted by a computer model and a... View full abstract»

• ### Calculation of Fourler Coefficlents of Experimentally Obtained Waveforms

Publication Year: 1981, Page(s):330 - 335
Cited by:  Papers (3)
| | PDF (2696 KB)

A new method has been developed for calculation of the Fourier coefficients of experimentally obtained waveforms. The coefficients are calculated as a function of the values of jumps at the points of waveform discontinuities. Examples are given for some practical waveforms. It has been shown that this method is especially applicable for computer analysis and provides and exact solution as opposed ... View full abstract»

• ### A Stabilized Doubly Fed Motor with a Separately Controlled Current Source Converter

Publication Year: 1981, Page(s):336 - 341
Cited by:  Papers (3)
| | PDF (1302 KB)

A speed-control system with a separately controlled current source converter is proposed for a doubly fed synchronous motor. Conventional systems with a voltage-source converter develop negative damping torques and become unstable. The theoretical analysis for a linearized model shows that the proposed system eliminates negative damping torques. The digital simulation of a nonlinear model and expe... View full abstract»

• ### Regenerative Braking Performance Analysis of a Thyristor-Chopper Controlled DC Series Motor

Publication Year: 1981, Page(s):342 - 347
Cited by:  Papers (5)
| | PDF (1234 KB)

This paper presents a comprehensive analysis which predicts the performance of a thyristor-chopper controlled dc series motor during regenerative braking operation. The analysis takes into account all the possible modes of operation during this type of braking, the nonlinearity of the magnetization characteristics including the variation of the field inductance, and the effect of the commutating c... View full abstract»

• ### Phase-Locked Loop DC Motor Drive with Improved Transient Performance

Publication Year: 1981, Page(s):347 - 352
Cited by:  Papers (6)
| | PDF (2603 KB)

A method to stabilize a phase-locked loop (PLL) dc motor control system is described. Integral square error (ISE) criterion is used to find out the constants of the stabilizing circuit for giving an optimum response. Transient response of the system is calculated for a sudden loading condition and changes in reference frequency. Experimental oscillograms are also included. View full abstract»

• ### Design of Multiloop Controllers for an Ammonia Reactor

Publication Year: 1981, Page(s):353 - 358
| | PDF (1577 KB)

The specific objective of this paper is to develop multiloop controllers that would achieve asymptotic regulation in the presence of parameter variations and disturbance inputs for a tubular reactor used in ammonia synthesis. The dynamic model considered here has nine state variables, two control inputs, and two outputs. A systematic procedure for pairing the two inputs with the corresponding two ... View full abstract»

• ### Pull-In Range Determination for a Class of Phase-Locked Loops

Publication Year: 1981, Page(s):359 - 363
| | PDF (2303 KB)

The synchronization of a controlled oscillator with external frequencies is investigated, and conditions for synchronization without cycle skipping are ascertained. Locking requirements are determined analytically by an indirect approach for a class of PLL's embodying first-order linear filters. The validity of this analytical approach is supported by experimental observations and is justified by ... 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»

• ### An On-Line Interactive Microcomputer-Based Parameter Optimization Technique

Publication Year: 1981, Page(s):370 - 375
| | PDF (1017 KB)

A general on-line parameter optimization technique is discussed. It consists of employing, in an interactive fashion, a microcomputer-based system to both drive and sample the output of a physical system in which some parameter is being varied. The microcomputer is then used to calculate and output an appropriate performance index, thereby directing the manner in which the parameter is varied, ult... View full abstract»

• ### Retrofitting Supervisory Control and Data Acquisition Systems with Microprocessor-Based Communications Processors

Publication Year: 1981, Page(s):376 - 380
Cited by:  Papers (1)
| | PDF (1252 KB)

This paper presents a cost-effective and practical method for retrofitting minicomputer-based supervisory control and data-acquisition systems by replacing the hardwired communications controllers with microprocessor-based communications controllers and data concentrators. View full abstract»

• ### A Microcomputer-Based Commutation Failure-Free Control System for the Cascaded Rectifier Circuit

Publication Year: 1981, Page(s):380 - 387
Cited by:  Papers (5)
| | PDF (2801 KB)

A Z80 microcomputer-based control system for the cascaded single-phase rectifier circuit is presented. The cascaded rectifier circuit is composed of two thyristor bridges, that is, one is the conventional bridge and the other thyristor bridge with forced commutation. This circuit configuration is adopted to improve the input power factor. The system uses the microcomputer to generate the required ... View full abstract»

• ### Letters to the Editor

Publication Year: 1981, Page(s):388 - 401
| PDF (3125 KB)
• ### Contributors

Publication Year: 1981, Page(s):402 - 406
| PDF (8106 KB)
• ### 1981 Index IEEE Transactions on Industrial Electronics and Control Instrumentation Vol. IECI-28

Publication Year: 1981, Page(s):406a - 406c
| PDF (826 KB)
• ### Index Subject

Publication Year: 1981, Page(s):406c - 406f
| PDF (1124 KB)

## Aims & Scope

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

Full Aims & Scope