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Showing papers presented at "International Power Electronics and Motion Control Conference in 2000"


Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this paper, the static current signatures of mechanical and insulation faults are summarized and various feature extraction methods for induction motor fault diagnosis are introduced, including artificial neural networks, fuzzy logic and expert systems.
Abstract: Induction motor faults including mechanical and insulation faults are reviewed. The static current signatures of mechanical faults are summarized. The various applicable feature extraction methods for induction motor fault diagnosis are introduced. Application of artificial intelligence, including artificial neural networks, fuzzy logic and expert systems are reviewed. Recent achievements on the diagnosis of inverter-fed induction motor drive systems are reviewed.

124 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, the idea of a three-phase linear motor first was announced and it took even more than 20 years to find a growing interest in machine engineering to understand the advantages of linear drives.
Abstract: It dates about 100 years back that the idea of a three-phase linear motor first was announced. In the 1960s, Eric Laithwaite published papers about theory and application of "flat three-phase linear motors". In parallel to him, at the Technical University of Chemnitz, similar activities took place to create the theory of these motors and to make first applications. Inspite of these first steps, it took even more than 20 years to find a growing interest in machine engineering to understand the advantages of linear drives. Last but not least, the power electronics helped to melt the ice. Now there are many firms offering linear drives for the application and looking for partners to realize direct drives with linear motors.

52 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: The overview of the power electronics building block (PEBB) concept and some of the issues such as the soft-switching techniques for the PEBBs, the packaging approaches, the communication among the PE BBs, and the system-level compatibility are presented.
Abstract: The power electronics building block (PEBB) concept is an integrated systems approach to standardize power electronics components and packaging techniques in the form of interchangeable subassemblies and modules. This paper presents the overview of this concept and some of the issues such as the soft-switching techniques for the PEBBs, the packaging approaches, the communication among the PEBBs, and the system-level compatibility. One of the research prototype systems is also demonstrated in this paper.

49 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, a new resonant gate driver is proposed for high frequency power conversion applications, which features complete energy recovery during both charging and discharging transitions, as well as minimized conduction loss.
Abstract: At high frequency power conversion applications, the power loss in driving power MOSFETs is significant. To reduce this loss, some resonant MOSFET gate drive schemes have been published. In this paper, a new resonant gate driver is proposed. In contrast with other gate drive schemes, the proposed driver features complete energy recovery during both charging and discharging transitions, as well as minimized conduction loss. Simulation and experiment results show that the proposed driver can reduce MOSFET gate drive loss very effectively.

39 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, a review of recent development and research trends related to the EMC/EMI issues in power electronics system are reviewed, including EMI characterization of power converters, the EMI power filter design, EMI suppression techniques for drive system and switching power supply, PCB layout, eMI modeling and simulation for power electronics systems are discussed separately in different sections.
Abstract: Recent development and research trends related to the EMC/EMI issues in power electronics system are reviewed. Research activities on EMI characterization of power converters, the EMI power filter design, EMI suppression techniques for drive system and switching power supply, PCB layout, EMI modeling and simulation for power electronics systems are discussed separately in different sections.

33 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, the design and testing of a new protection strategy for a matrix power converter feeding an induction motor is described, with excellent overvoltage protection, allowing to remove the large and expensive diode clamp.
Abstract: In this paper, the design and testing of a new protection strategy for a matrix power converter feeding an induction motor is described. The new protection strategy, with excellent overvoltage protection, allows to remove the large and expensive diode clamp.

33 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: The proposed DC-to-AC four-quadrant converter provides wide range frequency and amplitude sinusoidal voltage and the proposed multiloop controller consists of voltage controller and a current controller confirms the practical feasibility of the topology and control system.
Abstract: The paper describes topology and control of three-phase DC-to-AC converter for variable speed cage induction machine. The proposed DC-to-AC four-quadrant converter provides wide range frequency and amplitude sinusoidal voltage. The sinusoidal voltage is produces by PWM modulation passive LC filter and control system. The multiloop controller consists of voltage controller and a current controller. Experimental results have been given to verify the proposed topology and the control scheme. The results confirm the practical feasibility of the topology and control system.

31 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: A DSP-based fully digital drive for AC servo application is presented, in which a high performance DSP is used and all the control loops (speed and current) are implemented with software.
Abstract: A DSP-based fully digital drive for AC servo application is presented in this paper, in which a high performance DSP is used and all the control loops (speed and current) are implemented with software. Taking advantage of the fast calculation ability of DSP, this paper also designs an on-line self-tuning PI controller, which can detect the mechanical inertia time of this drive and realize the automatic adjustment of speed loop PI controller parameter. The simulation and experiment results have demonstrated that the drive has a good dynamic and robust performance.

31 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this paper, the authors examined the present power electronics technology in terms of its constituent technologies and discussed the present trends and the necessity for a paradigm shift in power electronics technologies identified.
Abstract: The paper examines the present power electronics technology in terms of its constituent technologies. The present trends are discussed. Packaging as a central driver is evaluated and the necessity for a paradigm shift in power electronics technology identified. Future possibilities in terms of integration and packaging of all active and passive functions into a hybrid module are discussed and concluded with an exposition of a wide ranging research program to develop future technology.

31 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: The application of adaptive neuro-fuzzy logic based speed control of induction motor drive is described, where the Conventional PI/PID controller is replaced by fuzzy controller in speed control loop.
Abstract: The fuzzy logic controllers with their inherent advantages are implemented for various applications. This paper describes the application of adaptive neuro-fuzzy logic based speed control of induction motor drive. The Conventional PI/PID controller is replaced by fuzzy controller in speed control loop. Adaptive neuro-fuzzy inference system (ANFIS) which tunes the fuzzy inference system with a backpropagation algorithm based on collection of input-output data is implemented. This enables the fuzzy system to learn. This training is given from a standard response data of the system and membership functions are suitably modified. The design of this ANFIS based fuzzy controller is presented. Simulation study indicates the superiority of fuzzy controllers over the conventional control method. The modified ANFIS controller is implemented using DSP. The test results are presented. The major advantage of the ANFIS based FLC system is to improve the system robustness.

30 citations


Proceedings ArticleDOI
15 Aug 2000
TL;DR: A large-signal average model for the controlled on-time boost power factor correction (PFC) circuit is developed and subsequently linearized resulting in a small-Signal model forThe PFC circuit, revealing new results on small- signal dynamics of the PFC Circuit.
Abstract: A large-signal average model for the controlled on-time boost power factor correction (PFC) circuit is developed and subsequently linearized resulting in a small-signal model for the PFC circuit. AC analyses are performed using the small-signal model, revealing new results on small-signal dynamics of the PFC circuit. The analysis results and model predictions are confirmed with experimental measurements on a 200 W prototype PFC circuit.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this paper, an IGBT-based 12 kV solid state high voltage pulse generator is proposed for nonthermal food processing, which is a simple main circuit topology is employed in this pulse generator to reduce the cost and meanwhile meet specified requirements for PEF food processing.
Abstract: High voltage pulsed electric field (PEF) is increasingly used for nonthermal food processes. This paper presents a design of an IGBT based 12 kV solid state high voltage pulse generator. A simple main circuit topology is employed in this pulse generator to reduce the cost and meanwhile still to meet specified requirements for PEF food processing. Intelligent IGBT modules, rated 1200 V and 1200 A, are used as power switches in the inverter circuit. A sophisticated grounding system is implemented to solve EMI caused by high integration of the equipment. In order to shape output pulse voltage wave, a dedicated DC bus for the inverter is developed to minimize stray inductance in the current loops. Experimental results are shown in this paper.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, a method using model reference adaptive system (MRAS) algorithm is presented for an online identification of load inertia, by using the result of identification, automatic adjustments to the speed controller can be made.
Abstract: During the operation of an induction motor (IM) drive system, parameters' vibration and external load disturbance will influence the effectiveness of control. A method using model reference adaptive system (MRAS) algorithm is presented in this paper for an online identification of load inertia. Further, by using the result of identification, automatic adjustments to the speed controller can be made. A scheme for tuning the speed controller automatically is introduced. Simulation results in both time domain and frequency domain show the usefulness of the proposed method.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: A self-adjusting fuzzy speed controller in a slip frequency vector-controlled system can not only enhance the robustness of the system, but also improve the steady-state precision and dynamic performance.
Abstract: A slip frequency vector-controlled system is not robust because it needs accurate mathematical model of the motor and it traditionally uses the PID method. By applying regular fuzzy control, the system's robustness can be improved, but the steady-state precision is lowered. This paper introduces a self-adjusting fuzzy speed controller in a slip frequency vector-controlled system. It can not only enhance the robustness of the system, but also improve the steady-state precision and dynamic performance. A simulation example is also presented.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, three kinds of triangle carrier PWM strategies (subharmonic PWM, triangular carrier phase shifting PWM and switch frequency optimal PWM) are compared through simulation results using Saber simulation software.
Abstract: This paper discusses three kinds of triangle carrier PWM strategies (subharmonic PWM, triangular carrier phase shifting PWM, and switch frequency optimal PWM) applied to a cascade multilevel converter (cascade inverters with separated DC sources). The control effects of them are compared through simulation results using Saber simulation software. Some conclusions and suggestion are given.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this paper, the design and analysis of an 8-pole permanent magnet generator rated at 5 kW and using NdFeB for the field excitation is presented, and the details of the generator are also presented.
Abstract: There has been much interest and studies in high efficiency wind generators with permanent magnet excitation due to the increasing availability of permanent magnet materials, especially NdFeB. The present paper aims to outline the design and analysis of such a PM generator. The generator that is being used will be an 8-pole permanent magnet generator rated at 5 kW and using NdFeB for the field excitation. The details of the permanent magnet generator are also presented.

Proceedings ArticleDOI
J. Sun, H. Konishi, Y. Ogino, E. Chu, Mutsuo Nakaoka 
15 Aug 2000
TL;DR: In this paper, a series resonant high-frequency transformer-linked voltage-multiplying rectifier is evaluated for an X ray high voltage generator on the basis of simulation analysis and observed data in experiment.
Abstract: In general, high-voltage DC power supplies employing a variety of high-frequency inverters are implemented for constant value control schemes. In particular, their good transient and steady-state performances can not be achieved under wide load variations for a medical-use high voltage X ray generator ranging from 20 kV to 150 kV in the output voltage and from 0.5 mA to 1250 mA, respectively. A high-voltage DC power supply designed for X ray power generator applications is considered, which uses series resonant inverter-linked multistage DC voltage multiplier instead of conventional high voltage diode module rectifier connected to the secondary-side of a high-voltage transformer. A constant on-time/variable frequency control scheme of this converter operating at zero-current soft switching mode is described. Introducing the capacitor-diode cascaded multistage voltage multiplier, the secondary turn numbers, and secondary-side stray capacitance of the high-voltage high-frequency transformer as well as the rectifier diode voltage ratings can be greatly reduced. It is proven that the proposed converter control scheme of the 2 step changed frequency selection switching is more effective for improving output voltage responses. A series resonant high-frequency transformer-linked voltage-multiplying rectifier is evaluated for an X ray high voltage generator on the basis of simulation analysis and observed data in experiment.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, a multi-pulse converter for high voltage and high power applications such as HVDC conversion is proposed, based on the DC current reinjection, further decreasing the number of components in the auxiliary circuit to achieve the same pulse number.
Abstract: This paper proposes a multi-pulse converter for high voltage and high power applications such as HVDC conversion. The proposed technique, based on the DC current reinjection, further decreases the number of components in the auxiliary circuit to achieve the same pulse number. Moreover a control strategy over the whole range of phase delay angle is obtained along with sophisticated input current and output voltage analysis. With the pulse multiplication strategy the proposed schemes demonstrate 24-pulse, 36-pulse and 48-pulse characteristics both in the input current and in the output voltage. Experimental results from a 3 kVA laboratory prototype verify the proposed concept.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this paper, a novel adjustable frequency quasi-resonant inverter and alternative dual frequency induction heating is presented. But the workpiece's heat-treated depth depends on not only output frequency of the inverter but also supplied power to the work.
Abstract: When such an uneven workpiece as a gear is hardened by induction heating, it is desirable that the workpiece is heated at both a higher frequency and a lower frequency. Thus, we report a novel adjustable frequency quasi-resonant inverter and alternative dual frequency induction heating which becomes possible. The heat-treated depth depends on not only output frequency of the inverter but also supplied power to the work. Therefore, we propose a new power control method of the reported inverter. The resistor of the circuit is divided into an equivalent loss resistor and an equivalent output resistor where the equivalent output resistance varies in accordance with the supplied current. The input DC voltage of the inverter is manipulated so that the calculated output power may be equal to the desired variable after the output frequency was controlled to the desired variable.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this paper, a switching strategy for multilevel cascade inverters based on the space vector theory is proposed, which generates a voltage vector across the load with minimum error respect to the sinusoidal reference, with very low harmonic distortion and reduced switching frequency.
Abstract: This paper presents a switching strategy for multilevel cascade inverters, based on the space vector theory. The proposed high performance switching strategy generates a voltage vector across the load with minimum error respect to the sinusoidal reference, with very low harmonic distortion and reduced switching frequency, without the use of traditional sinusoidal PWM techniques or more sophisticated vector modulation methods.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, various permanent magnet machines using Halbach cylinders (arrays), from using pre-magnetised anisotropic magnet segments having varying magnetisation orientations, to those moulded as bonded isotropic or anisotrop NdFeB ring magnets, which are subsequently impulse magnetised using a magnetisation fixture which produces a sinusoidal MMF distribution.
Abstract: This paper describes various permanent magnet machines using Halbach cylinders (arrays), from using pre-magnetised anisotropic magnet segments having varying magnetisation orientations, to those moulded as bonded isotropic or anisotropic NdFeB ring magnets, which are subsequently impulse magnetised using a magnetisation fixture which produces a sinusoidal MMF distribution. Three possible magnetisation fixture designs are described. Various Halbach cylinder machine topologies are then reviewed, including radial and axial field, slotted and slotless, rotary and linear (tubular and planar) permanent magnet machines with and without rotor and/or stator back-irons. The paper also reviews their typical applications, ranging from integrated motor and generator in flywheel applications, linear motors with ultra high acceleration, ultra high speed motors, multi-axis rollers, high performance servo drives, to passive magnetic bearings and magnet powder alignment system.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this paper, a control algorithm was developed with the objective of eliminating the harmonics and reactive power for the parallel hybrid active filters for the load current, which is assumed to have the 5th and 7th harmonics along with the fundamental component, and the cross-coupling current control scheme was utilized for decoupling d-q current dynamics interaction.
Abstract: A control algorithm is developed with the objective of eliminating the harmonics and reactive power for the parallel hybrid active filters. In this problem set, the load current is assumed to have the 5th and 7th harmonics along with the fundamental component. We utilize the three synchronous reference frames (SRF) and the low pass filters to measure the fundamental, 5th, 7th components separately. In the SRF rotation at the fundamental frequency, the q-axis current is controlled to regulate the reactive power and d-axis current is controlled to keep constant the DC link voltage of the converter. In the SRF's rotation at the frequencies of 5th and 7th harmonics, the filter currents are controlled to cancel out the 5th and 7th harmonics of the load. In each controller the cross-coupling current control scheme is utilized for decoupling d-q current dynamics interaction.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, a unified constant-frequency integration (UCI) control method for a three-phase active power filter (APF) is proposed, which eliminates the need of sensing the three phase load current, the nontrivial task of calculating the harmonics and reactive current components, as well as the use of any multipliers.
Abstract: In this paper, a unified constant-frequency integration (UCI) control method for a three-phase active power filter (APF) is proposed. The proposed control method eliminates the need of sensing the three-phase load current, the nontrivial task of calculating the harmonics and reactive current components, as well as the use of any multipliers, as required by previously reported control methods. By applying one-cycle control and sensing the mains line current, unity power factor and low input current distortion can be realized by one integrator with reset along with a few linear components such as flip-flops, comparators and clock. The proposed controller is simple, robust, and reliable. All findings are supported by simulation and experiments.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this paper, a sliding mode controller based on model reference adaptive control (MRAC) is proposed for a permanent magnet synchronous motor (PMSM) system, which employs a slidingmode control (SMC) strategy in order to reduce the complex identification of MRAC.
Abstract: In this paper, a sliding mode controller based on model reference adaptive control (MRAC) is proposed for a permanent magnet synchronous motor (PMSM) system. The controller employs a sliding mode control (SMC) strategy in order to reduce the complex identification of MRAC. By employing the proposed control scheme, the response of the PMSM system will keep pace with the reference model strictly and is insensitive to system uncertainties and load disturbance. This kind of controller achieves a good result in simulations.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, the authors proposed a novel transportation system without the electrical magnet for the levitation system, where there is only the linear induction motor as the drive system and they used the attractive force of the motor for the Levitation.
Abstract: Magnetically levitated transportation systems are used in various fields, for example in the clean room, because they have unique merits such as being contactless. The usual system has the levitation system, such as electrical magnets and drive system and a linear motor, respectively. In this system we should control the levitation in considering the attractive force caused by the drive system because the linear motor used as the drive system has not only the thrust force but also the attractive force changing the condition of the electrical power source. Then in this paper, we propose a novel transportation system without the electrical magnet for the levitation system. In this system, there is only the linear induction motor as the drive system and we use the attractive force of the motor for the levitation. We propose a novel method to control the levitation and the drive simultaneously. We use a new power source combined with the high frequency component and the low frequency one. At first, we show the basic characteristics of the linear induction motor used as the drive system and explain the concept of the proposed control method. Secondly we show the characteristics of the motor powered by the combined power supply. Next we explain the control scheme. Finally we show the results of the levitation controlled by the proposed method.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: A sensorless control method of position estimation for permanent magnet (PM) synchronous machines, using rotating vector, carrier frequency excitation and heterodyning, tracking observers for position estimation is discussed.
Abstract: This paper introduces a sensorless control method of position estimation for permanent magnet (PM) synchronous machines. The method, using rotating vector, carrier frequency excitation and heterodyning, tracking observers for position estimation is discussed. The experimental results for the case of a buried PM machine are shown in the paper. It has been demonstrated that this technique can operate over a wide speed range.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: This paper presents a sensorless direct torque control (DTC) propulsion method of a 1/2-scale controlled-PM linear synchronous motor (LSM) Maglev model vehicle which is not levitated and used as a PM LSM vehicle supported by the wheel.
Abstract: This paper presents a sensorless direct torque control (DTC) propulsion method of a 1/2-scale controlled-PM linear synchronous motor (LSM) Maglev model vehicle which is not levitated and used as a PM LSM vehicle supported by the wheel. This is the first experiment for DTC to be applied to linear propulsion without position and speed sensors, which is one of the most important problem to be solved in practical applications. DTC can control directly thrust force and the stator flux linkage by the switching commands of the six inverter-arms with a switching table. The DC voltage and three phase current are adapted instead of position and speed sensors. A 3-m-propelling-motion experiment with a constant speed of 0.4 m/s shows that the demanded position and speed can be traced accurately even though there is a strong detent force.

Proceedings ArticleDOI
M. Kaneda1, H. Tanaka, S. Muraoka, S. Hishikawa, Mutsuo Nakaoka 
15 Aug 2000
TL;DR: In this paper, the authors presented a new generation product of induction fluid heating appliance using a novel voltage source type quasi-resonant ZVS-PWM high frequency inverter which incorporates a constant frequency variable power regulation scheme.
Abstract: This paper presents a new generation product of induction fluid heating appliance using a novel voltage source type quasi-resonant ZVS-PWM high frequency inverter which incorporates a constant frequency variable power regulation scheme. Its operating principle and unique features are illustrated and evaluated on the basis of computer simulation and experimental results implemented on a 4 kW breadboard systems designed for moving fluid heating appliance in pipeline systems. The promising cost effective high efficient inverter-fed fluid heating appliance in pipeline plants is proposed from a practical point of view for induction heating boiler super heated steam generator, hot gas producer and metal catalysis heating for exhaust gas cleaning in an engine acceptable for industrial, chemical systems and consumer heat energy processing appliances.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this paper, a survey of real-time network control technology for advanced digital motion control system is presented and future development trend of realtime network for motion control has been forecasted.
Abstract: This paper presents a survey of the applications of real-time network control technology to advanced digital motion control system. Applications of PROFIBUS, FIP, CAN bus, Interbus-S, SERCOS, and Ethernet to coordinated motion control have been studied. Realization issues in application of real-time network control for motor drives and coordinated motion control systems are discussed. Future development trend of real-time network for motion control has been forecasted.

Proceedings ArticleDOI
15 Aug 2000
TL;DR: In this article, the authors developed an advanced solid-state transfer switching scheme using a novel hybrid switch device, resulting in negligible loss consumption and eliminating the need for cooling equipment, and they presented the following aspects and operating characteristics of the proposed SSTS.
Abstract: The authors have developed an advanced solid-state transfer switching scheme using a novel hybrid switch device, resulting in negligible loss consumption and eliminating the need for cooling equipment. In this paper, the authors present the following aspects and operating characteristics of the proposed SSTS (solid-state transfer switch): (1) construction and operating characteristics of the low loss SSTS using the hybrid switch devices; (2) construction and operating characteristics of the hybrid switch device and its compact design using 12 kV, 1.5 kA thyristor; and (3) analysis of opening and closing characteristics of the hybrid switch device, especially in terms of opening characteristics of the parallel switch and current commutation characteristics from parallel switch to thyristors, along with test results.