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# Proceedings Eighth Annual Applied Power Electronics Conference and Exposition,

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Displaying Results 1 - 25 of 129
• ### Proceedings of IEEE Applied Power Electronics Conference APEC '93

Publication Year: 1993
| PDF (508 KB)
• ### EMI conducted emission in differential mode emanating from a SCR: phenomena and noise level prediction

Publication Year: 1993, Page(s):815 - 821
Cited by:  Papers (5)
| | PDF (448 KB)

An electromagnetic compatibility (EMC) analysis of a power converter is presented. In particular, the phenomena and modeling of conducted noises emission caused by a silicon controlled rectifier (SCR) are described. Theoretical results in the time as well as frequency domain are discussed and compared to the measured time signal and its spectrum.<> View full abstract»

• ### Evolution and status of smart power technology

Publication Year: 1993, Page(s):18 - 21
Cited by:  Papers (4)
| | PDF (252 KB)

The progress made in power semiconductor technology that has led to the evolution of smart power integrated circuits is reviewed. The displacement of bipolar power transistors with power MOSFETs and insulated gate bipolar transistors (IGBTs) is a crucial element that has a significant impact on power electronic applications. Trends in technological developments and approaches under investigation t... View full abstract»

• ### Analysis of fuzzy control method applied to DC-DC converter control

Publication Year: 1993, Page(s):22 - 28
Cited by:  Papers (18)  |  Patents (9)
| | PDF (316 KB)

The application of fuzzy control to DC-DC converters operating at finite switching frequency is studied. Several control methods used for buck and boost converters are compared to the fuzzy converter control. Simulation results for several control methods are presented. The simulations show that the fuzzy control method has better dynamic performance and less steady state error View full abstract»

• ### Total quality management process to achieve excellence

Publication Year: 1993, Page(s):29 - 34
Cited by:  Papers (1)
| | PDF (424 KB)

The authors report on an industrial total quality management system at AT and T Power Systems, which relies on extensive data and information analysis as an essential element of both the planning and improvement of performance. Information alone does not make quality happen, but allows the setting and communication of tangible goals, and the measurement and tracking of progress. It is a basic tool... View full abstract»

• ### Accurate leakage models of gapped magnetic circuits

Publication Year: 1993, Page(s):596 - 603
Cited by:  Papers (15)
| | PDF (552 KB)

A general permeance model valid for any gap arrangement is developed. The main advantage is that a single set of measurements performed for an arbitrary gap configuration completely characterizes the core and allows predictions for any other gap arrangement. A method to predict the leakage permeance of a core from its geometry is suggested View full abstract»

• ### High density power for low voltage pulsed loads

Publication Year: 1993, Page(s):37 - 43
Cited by:  Papers (1)
| | PDF (428 KB)

Several circuit topologies have the characteristic that a capacitor at high voltage is directly transformer coupled to the low voltage output giving a capacitor multiplying effect. The use of these converters for supplying low voltage pulsed loads is investigated. The need for ultralow leakage inductance transformers is shown, and the development of these transformers is described. The effect of p... View full abstract»

• ### Multi-speed control of single-phase induction motors for blower applications

Publication Year: 1993, Page(s):153 - 158
Cited by:  Papers (1)
| | PDF (428 KB)

A simple electronic scheme is studied for multispeed operation of a permanent split capacitor single phase induction motor used to run fractional horsepower blowers and pumps. Computer simulations are used to predict efficiency, harmonic distortion, and pulsating torque when the motor is fed at 60 Hz, 40 Hz or 30 Hz by means of a four-triac bridge circuit. Results of simulations and laboratory tes... View full abstract»

• ### A new control strategy for static VAr compensators for minimum harmonic injection

Publication Year: 1993, Page(s):656 - 661
Cited by:  Papers (3)
| | PDF (392 KB)

A firing strategy for the force-commutated, static volt-ampere reactive (VAr) compensator is proposed. Minimization of harmonic currents injected into the AC system is achieved through numerical optimization of the firing angles. Two control methods are discussed and compared. The method is flexible and useful for fairly low switching frequency (about 15 pulses per half cycle). The resulting AC cu... View full abstract»

• ### Modeling and design of transformers and coupled inductors

Publication Year: 1993, Page(s):589 - 595
Cited by:  Papers (12)
| | PDF (596 KB)

The modeling and design of transformers and coupled inductors are discussed. After a brief review of Maxwell's laws and magnetic circuit models, the magnetic and electric models of transformers and coupled inductors are developed, including both magnetizing and leakage effects. An integrated structure with both transformer and coupled inductor on the same core is discussed, together with the speci... View full abstract»

• ### Single-cycle resonant bidirectional DC/DC power conversion

Publication Year: 1993, Page(s):44 - 50
Cited by:  Papers (19)  |  Patents (1)
| | PDF (348 KB)

Two new families of bidirectional DC/DC converters suitable for high frequency high efficiency operation are proposed, based on single-cycle resonant (SCyR) topology. The ZCS/ZVS and ZVS/ZCS-SCyR bidirectional converter families are capable of resonant operation from no-load to full-load, and they have load independent PWM-like characteristics. Experimental results supporting the proposed concept ... View full abstract»

• ### Input filter design for PWM current-source rectifiers

Publication Year: 1993, Page(s):824 - 830
Cited by:  Papers (14)  |  Patents (3)
| | PDF (384 KB)

Pulse width modulated (PWM) rectifiers allow the elimination of low order harmonics. Filtering requirements for PWM current-source rectifiers are usually satisfied through the use of low-pass LC input filters. The design of LC filters involves the positioning of the resonant frequency to meet the harmonic attenuation requirements (THD), and the introduction of damping at the reso... View full abstract»

• ### Dynamic properties of a step-down sinusoidal current AC/DC converter under state-feedback control

Publication Year: 1993, Page(s):161 - 167
Cited by:  Papers (7)
| | PDF (444 KB)

A control system is presented for a switching AC/DC converter which complies with electromagnetic compatibility (EMC) standards on conducted emissions and is suitable for applications presently using line-commutated controlled-rectifiers. The properties of the buck converter (which steps-down from 0.866 Vline(peak)) are compared to those of the established boost converter (which steps-u... View full abstract»

• ### The influence of shunt capacitor compensation on the performance of PWM inverter fed induction motor drives

Publication Year: 1993, Page(s):649 - 655
| | PDF (300 KB)

A motor drive system comprising a pulse-width modulation (PWM) voltage source inverter feeding a shunt capacitor compensated induction motor is analyzed to ascertain how shunt capacitor compensation improves motor waveform quality and steady-state characteristics. The motor performances under balanced and two fault conditions (motor phase a' open and capacitor phase a' open) are modeled and comp... View full abstract»

• ### Robust control of current-mode controlled converters

Publication Year: 1993, Page(s):745 - 751
Cited by:  Patents (1)
| | PDF (440 KB)

A robust controller for multimodule current-mode push-pull power converters is presented. First, the small-signal equivalent circuit and transfer function model of the converter system are found. Then the slope compensation is selected and model reduction is performed using the concept of dominant energy mode. Based on the reduced converter models, a PI (proportional-integral) controller is quanti... View full abstract»

• ### Making your next catalog sparkle: getting the most from a catalog database service

Publication Year: 1993, Page(s):106 - 110
| | PDF (608 KB)

To take advantage of electronic publishing, it is necessary to understand its capabilities and limitations. The flexibility, accuracy and cost of traditional layout and paste-up methods are compared to the newer computerized layout methods, based on actual experience. Techniques of getting the best results are presented, and the author discusses how much personal effort is required. The appropriat... View full abstract»

• ### Finite element analysis of power electronic circuits containing nonlinear magnetic components

Publication Year: 1993, Page(s):584 - 588
Cited by:  Papers (2)
| | PDF (288 KB)

A new finite element technique that allows nonlinear time domain analysis of power electronic circuits containing magnetic components is presented. The new technique is shown to compute the same voltage waveform in a nonlinear RLC circuit as previously published circuit techniques. The new technique is demonstrated for a circuit containing an inductor with a nonlinear B-H View full abstract»

• ### Eliminating traditional inspection from the electronics manufacturing process

Publication Year: 1993, Page(s):244 - 248
| | PDF (372 KB)

The author describes the transition from traditional, after the fact, workmanship inspection by quality assurance department inspectors to preventive inspection by the operators who assemble the electronics hardware, utilizing a self-directed work team that has been trained and empowered not only to build quality into the product but to inspect, verify, and accept it, utilizing the `buddy system' ... View full abstract»

• ### A half bridge, self-oscillating, multi-resonant converter circuit

Publication Year: 1993, Page(s):77 - 84
Cited by:  Papers (2)  |  Patents (6)
| | PDF (664 KB)

A self-oscillating power converter circuit utilizing three reactive elements is described. This converter operates above the resonant frequency to produce zero voltage switching. The reactive elements in the circuit accommodate the parasitics of the transformer to minimize the design constraints on it. Circuitry is included to minimize the frequency variations and improve the regulation without co... View full abstract»

• ### Capacitive-loaded push-pull parallel-resonant converter

Publication Year: 1993, Page(s):51 - 57
Cited by:  Papers (5)
| | PDF (428 KB)

The results of a theoretical and experimental investigation of a capacitive-loaded push-pull parallel-resonant DC-DC converter (CL-PPRC) are presented and discussed. The converter is driven by a lower than resonance frequency, and the secondary voltage is rectified and smoothed by a capacitive filter. The CL-PPRC is shown to operate in the zero voltage switching (ZVS) mode with a boostlike DC tran... View full abstract»

• ### Pulsed EMI protection in electronic power supplies

Publication Year: 1993, Page(s):898 - 905
| | PDF (484 KB)

The author studies the nature of various pulsed electromagnetic interference (EMI) sources, their effects on electronic power supplies, and different types of protection circuitries, as well as the design constraints on these circuitries. The different pulsed EMI sources are described, with special emphasis on lightning. The power failure mechanisms caused by a lightning transient are identified, ... View full abstract»

• ### Power-factor correction with interleaved boost converters in continuous-inductor-current mode

Publication Year: 1993, Page(s):168 - 174
Cited by:  Papers (115)  |  Patents (104)
| | PDF (452 KB)

The operation and design trade-offs of the interleaved boost converter in continuous inductor-current mode in a high-power-factor preregulator circuit are investigated. By using interleaved converters, an overall reduction of boost inductor and electromagnetic interference (EMI) filter volume can be achieved, together with reduced switching losses. The problem of unequal load sharing between the i... View full abstract»

• ### A new approach to programmed PWM implementation

Publication Year: 1993, Page(s):793 - 798
Cited by:  Papers (7)
| | PDF (340 KB)

A new approach is presented that can help in designing a pulse width modulator circuit to implement the precalculated angles technique for application in voltage source inverters (VSIs). With this approach, a circuit is constructed using semicustom erasable/programmable logic devices (EPLDs) and the selected harmonic elimination pulse width modulation (SHE-PWM) technique is implemented. A VSI is f... View full abstract»

• ### A novel simulation technique for the analysis of digital asynchronous pulse width modulation

Publication Year: 1993, Page(s):504 - 509
Cited by:  Papers (1)
| | PDF (316 KB)

A digital simulation technique based on single Fourier series is used to predict the spectra, including the nonintegral harmonics, generated by digital asynchronous pulse width modulation invertors. The results, with an accuracy of 70 dB, are superior to the results obtained with fast Fourier transform techniques, and offer an alternative to the complex methods based on double Fourier integration ... View full abstract»

• ### Small-signal analysis of an energy-recovery buck-derived converter

Publication Year: 1993, Page(s):639 - 645
| | PDF (436 KB)

The small-signal analysis of an energy-recovery buck-derived power converter is presented. This converter derives its input voltage from an energy storage reservoir capacitor and returns the stored energy to the respective DC bus. A prototype built to recover energy from a full scale 150 kVA PWM gate-turnoff (GTO) inverter is used to prove the proposed analytical model View full abstract»