IEE Proceedings - Electric Power Applications
Volume 152, Issue 6, November 2005
Volumes & issues:
Volume 152, Issue 6
November 2005
-
- Author(s): J.-M. Kwon ; W.-Y. Choi ; B.-H. Kwon
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1381 –1388
- DOI: 10.1049/ip-epa:20050079
- Type: Article
- + Show details - Hide details
-
p.
1381
–1388
(8)
A high-performance plasma-display-panel ‘sustain’ power supply is proposed. The proposed convertor consists of a boost convertor for power-factor correction (PFC) and a half-bridge flyback convertor for DC–DC power conversion. The boost convertor reduces the reverse-recovery loss of the diode by adding a simple inductor–diode branch. The half-bridge flyback convertor is driven in complementary control for zero-voltage switching and also its output diode commutates with zero-current switching. The proposed convertor is analysed and optimised for high power efficiency. Experimental results for a 300 W convertor at a constant switching frequency of 100 kHz are obtained to show good performance of the proposed convertor. - Author(s): P. Pennacchi and L. Frosini
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1389 –1400
- DOI: 10.1049/ip-epa:20050178
- Type: Article
- + Show details - Hide details
-
p.
1389
–1400
(12)
This paper presents a method to analyse the dynamical behaviour of large-size generators due to the magnetic pull. In rotating electrical machines, the electromagnetic radial forces acting upon rotor and stator surfaces are very large, but they are balanced when the rotor is concentric with the stator. Similarly, the tangential forces produce only an axially rotating moment. If the rotor becomes eccentric, then an imbalance of these forces occurs, so that a net radial electromagnetic force, known as Unbalanced Magnetic Pull (UMP), is developed. The models traditionally proposed in the literature to study the UMP can be considered as reliable in case of small size electrical machines supported by rolling bearings. On the contrary, in case of large-size machines, such as turbo-generators supported by oil-film bearings, the approximation of circular orbit for the geometric centre of the rotor is not acceptable. Nevertheless, the authors who have dealt with UMP in large generators have disregarded that these filtered orbits of the rotor are elliptical and generally the orbit centre is not concentric with the stator. A more realistic model is introduced in this work and the actual distribution of the air-gap length during the rotation will be determined in analytical terms, by taking into account the effects produced by the actual rotor orbit. The actual UMP is calculated by using the air-gap permeance approach and the simulation of the dynamical behaviour of a 320 MVA generator is presented, showing the harmonic content of the UMP and the presence of nonlinearities. - Author(s): S.S. Tanavade ; H.M. Suryawanshi ; K.L. Thakre ; M.A. Chaudhari
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1401 –1409
- DOI: 10.1049/ip-epa:20045274
- Type: Article
- + Show details - Hide details
-
p.
1401
–1409
(9)
A novel DC–DC converter using modified series–parallel resonant converter is proposed. The converter is analysed in detail using a Fourier series approach. The design curves for the converter are plotted using MATLAB. Based on the analysis and the design curves, a systematic design procedure is presented. A prototype DC–DC converter of 2.5 kW rating has been built using the design procedure. To verify its performance, the PSIM simulation and detailed experimental results are shown for different load conditions. Variable frequency control is implemented using a digital signal processor to regulate the output voltage under varying load conditions. The proposed converter maintains zero voltage switching for the entire load range and requires a narrow variation in the switching frequency for its output voltage regulation. - Author(s): C.-H. Kao ; C.-C. Tseng ; Y.-C. Liang
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1410 –1416
- DOI: 10.1049/ip-epa:20045151
- Type: Article
- + Show details - Hide details
-
p.
1410
–1416
(7)
An equivalent-circuit model for an insulated gate bipolar transistor is developed. The model is based on a one-dimensional device simulation model. It also adopts a multi-MOS model so as to be able to include the doping variation in the MOS body. The model can be used for both circuit simulations and simple device simulations. The simulation results agree with experimental observations. - Author(s): M.A. Mueller ; A.S. McDonald ; D.E. Macpherson
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1417 –1426
- DOI: 10.1049/ip-epa:20050227
- Type: Article
- + Show details - Hide details
-
p.
1417
–1426
(10)
Analytical expressions obtained from circular plate, elastic beam and cylindrical shell theory are applied to calculate the structural mass of axial-flux permanent-magnet machines for a range of typical wind-turbine ratings. Finite-element models and data from existing low-speed axial-flux machines have been used to gain confidence in the models presented, such that they can be incorporated into design-office programs to rapidly provide a first-order estimate with a reasonable level of accuracy. Results confirm that the inactive mass is greater than 60% of the machine total mass, and at multimegawatt ratings it is almost 90% of the total mass. Optimisation of the machine must therefore include the link between structural and electromagnetic designs. Results presented illustrate the impact of inactive mass on geometrical design parameters and also show that multistage designs can lead to a reduction in mass. - Author(s): P.J. Tavner and A.F. Anderson
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1427 –1439
- DOI: 10.1049/ip-epa:20050102
- Type: Article
- + Show details - Hide details
-
p.
1427
–1439
(13)
A core fault is a failure in the laminated core of a large electrical machine. Such faults are relatively rare but when they occur, the value of the machine and its importance mean that the investigation of the failure assumes a high priority. On many occasions the details of such failures assume major commercial significance, therefore failure investigations have, of necessity, to be handled in a confidential manner, touching as they do on the design, manufacture, operation and insurance of large electrical plant. There has therefore been no published literature on core faults. However, the scientific principles of the mechanisms at work have been studied in considerable detail and papers published on those principles in the international literature. This paper brings together that literature and those scientific principles, giving details of the underlying design, constructional and operational factors which affect these faults. New evidence is presented of the underlying factors which allow core faults to initiate and grow. The paper will allow engineers to analyse such faults, draw rational conclusions on the causes for each occasion and devise suitable repair/rebuild strategies applicable to that situation. - Author(s): P. Salminen ; T. Jokinen ; J. Pyrhönen
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1440 –1444
- DOI: 10.1049/ip-epa:20050175
- Type: Article
- + Show details - Hide details
-
p.
1440
–1444
(5)
Concentrated winding permanent magnet motors, CWPMM and their ability to produce torque are studied. A method for computing the pull-out torque of concentrated winding PM-motors is introduced. A correlation between the pull-out torque and the number of slots per pole and per phase is found. The results obtained indicate how the torque behaves in cases of different types of CWPMMs. Different computation methods to solve the pull-out torque are compared. Finally, a simplified theory to estimate the pull-out torque differences of CWPMMs is presented. For concentrated winding PM-motors that are designed to have the same frame size, the same output power and the same speed, the pull-out torque is proportional to the number of stator slots per pole and per phase. This correlation may help the motor designer to select the suitable number of poles and slots in accordance with the desired pull-out torque. - Author(s): Y. Liu and X. He
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1445 –1450
- DOI: 10.1049/ip-epa:20045270
- Type: Article
- + Show details - Hide details
-
p.
1445
–1450
(6)
A corona surface treatment based on a pulse density modulation (PDM) and pulse frequency modulation (PFM) hybrid control scheme is presented. The PDM scheme is used to regulate the output power of the inverter and the PFM scheme is used to compensate for temperature and other environmental influences on the discharge. Experimental results show that the PDM and PFM hybrid control series-resonant inverter (SRI) makes the corona discharge treatment simple and compact, thus leading to higher efficiency. The hybrid control SRI is able to realise constant frequency control and linear power adjustment and is thus becoming an ideal choice for corona discharge treatment. - Author(s): A. Yazdani and R. Iravani
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1451 –1458
- DOI: 10.1049/ip-epa:20045259
- Type: Article
- + Show details - Hide details
-
p.
1451
–1458
(8)
A novel high-performance switched-mode rectifier system for high-power applications is introduced. The rectifier system comprises a three-level neutral-point-diode clamped (NPC) AC/DC rectifier, which is interfaced to the DC load through a DC/DC buck converter. The NPC converter provides a tightly regulated DC voltage at the input of the buck converter; the buck converter provides a rapid current control for the load. This novel arrangement has the following technical merits: (i) fast transient response, (ii) operation at unity power factor, (iii) low distortion AC-side currents, and (iv) capability to operate at high-voltage levels with commercially available power switches rated at lower voltage levels, (v) elimination of multi-winding transformers, and (vi) decoupling between the DC load and the supply system in terms of rapid transients of AC and DC sides. Dynamic models and control schemes for the proposed rectifier system are presented. The control schemes include the buck converter control, the NPC capacitor voltage balancer, the DC-bus voltage control and the AC-side current control. Superior performance of the proposed rectifier system is validated through digital time-domain simulation studies in the PSCAD/EMTDC environment. - Author(s): T.-F. Chan ; L.L. Lai ; L.-T. Yan
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1459 –1467
- DOI: 10.1049/ip-epa:20050126
- Type: Article
- + Show details - Hide details
-
p.
1459
–1467
(9)
The performance analysis of a stand-alone permanent-magnet synchronous generator with inset rotor using a coupled-circuit, time-stepping, two-dimensional finite-element method is described. The direct-coupled field-circuit method enables the instantaneous values of the field and circuit variables to be solved simultaneously, without having to evaluate the synchronous reactances and the load angle. Magnetic saturation is accounted for by considering the flux densities in the elements of the field solution region. Besides the load characteristics, the coupled field-circuit solution also yields other useful machine information including the flux plots, components of the air-gap flux density, and the waveforms of voltages and currents. The flux plots obtained clearly demonstrate the effect of armature current on the interpolar flux that helps to improve the voltage regulation. Good agreement between the computed and experimental results has been obtained on a 2.5 kVA prototype generator. - Author(s): R.-L. Lin ; J.-F. Chen ; H.-P. Chi
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1468 –1476
- DOI: 10.1049/ip-epa:20050177
- Type: Article
- + Show details - Hide details
-
p.
1468
–1476
(9)
This paper presents a Spice-based flux-linkage model for the switched-reluctance motor (SRM). At present, most of the conventional methods require numerous data points of flux-linkage corresponding to rotor position and phase current to build a model, but this is time-ineffective. In the proposed method, the flux linkage is represented by a limited number of Fourier series terms. The coefficients of the Fourier series are determined by using the Froelich function. The proposed method allows the model to be built with a minimal number of static-characteristic data points, which are simply obtained through finite-element analysis (FEA); this allows for easy implementation and high computational efficiency. With the proposed Spice-based model, the converters of SRM drive system can be designed on the platform of Spice. The proposed model is validated with the experimental results. - Author(s): A. Hodder ; J.-J. Simond ; A. Schwery
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1477 –1481
- DOI: 10.1049/ip-epa:20045170
- Type: Article
- + Show details - Hide details
-
p.
1477
–1481
(5)
An unbalanced DC-link voltage regulation strategy is proposed for a three-level voltage source inverter used in the rotor cascade of a double-fed asynchronous motor-generator. The major problem in determining the presence of the unbalanced component is investigated and a solution is proposed using an adaptable filter. This latter is only of a low order and is designed to ensure easy implementation into a (DSP). The regulator is based on the injection of a second order harmonic and its design is presented as well as an investigation of the critical point for correct action of the regulator. Real measurements performed on a low-power test bench after implementation into a DSP validate the accuracy and quality of the filter as well as the control strategy proposed. - Author(s): P.-Z. Lin ; C.-M. Lin ; C.-F. Hsu ; T.-T. Lee
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1482 –1488
- DOI: 10.1049/ip-epa:20045232
- Type: Article
- + Show details - Hide details
-
p.
1482
–1488
(7)
Fuzzy controllers and fuzzy sliding-mode controllers have found extensive use in a variety of applications. Generally, type-1 fuzzy sets are used for the membership functions of these controllers. However, in real-time applications, uncertainty associated with the available information always occurs. A type-2 fuzzy controller and a type-2 fuzzy sliding-mode controller are proposed that are able to solve the problem that the words used in the inference rules can mean different things to different people. Since the membership functions use type-2 fuzzy sets then, the proposed control schemes can handle the rule uncertainties when the operation is extremely uncertain and/or the membership grades cannot be exactly determined. The proposed control systems are applied to control a buck DC–DC converter. A comparison between a PI controller, a type-2 fuzzy controller and a type-2 fuzzy sliding-mode controller is made. The experimental results show that the type-2 fuzzy sliding-mode controller achieves the best control performance. - Author(s): C.-C. Kung and K.-H. Su
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1489 –1502
- DOI: 10.1049/ip-epa:20045253
- Type: Article
- + Show details - Hide details
-
p.
1489
–1502
(14)
An adaptive fuzzy total-sliding-mode controller (AFTSMC) with a total switching surface is proposed to control the position of an electrical servodrive. The proposed controller comprises a special fuzzy total-sliding-mode controller (FTSMC) and an adaptive tuner. The FTSMC acts as the main tracking controller, which is designed via a fuzzy system to mimic the merits of a total-sliding-mode controller (TSMC). In addition, a translation width is embedded into fuzzy rules to reduce the chattering phenomena. The adaptive tuner, which is derived in the sense of Lyapunov stability theorem, is utilised to adjust the translation width on-line for further assuring robust and optimal performance. In the AFTSMC, the fuzzy-control-rules base is compact and only one parameter needs to be adjusted. An electrical servodrive with the proposed position-control system possesses the advantages of a simple control framework, reduced chattering, stable performance and robustness to uncertainties. The effectiveness is demonstrated by simulated and experimental results, and its advantages are indicated in comparison with conventional TSMC and adaptive TSMC for a field-oriented control induction-motor (IM) drive. - Author(s): D.-C. Lee ; K.-J. Lee ; J.-K. Seok ; J.-W. Choi
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1503 –1508
- DOI: 10.1049/ip-epa:20050027
- Type: Article
- + Show details - Hide details
-
p.
1503
–1508
(6)
A novel online capacitance estimation method for a DC-link capacitor in a three-phase AC/DC/AC PWM converter is prepared. At no load, a controlled AC current with a lower frequency than the line frequency is injected into the input side, which then causes AC voltage ripples at the DC output side. By extracting the AC voltage and current components on the DC output side using digital filters, the capacitance can then be calculated using the recursive least squares method. The proposed method can be simply implemented with only software and no additional hardware. Experimental results confirm that the estimation error is less than 0.26%. - Author(s): Y. Lu ; K.W.E. Cheng ; S.L. Ho ; J.F. Pan
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1509 –1515
- DOI: 10.1049/ip-epa:20045261
- Type: Article
- + Show details - Hide details
-
p.
1509
–1515
(7)
A controller design methodology to regulate the output voltage of a phase-shifted resonant converter is presented. The design objective is to overcome the highly nonlinear characteristics of the phase-shifted resonant converter observed when the load is unknown. The control goal is to maintain the output voltage at desired values in the presence of large load perturbations by varying the phase angle of the full-bridge converter. The controller is derived using passivity theory which ensures that the closed-loop system is exponentially convergent and that only a single output feedback is required. An adaptive version is deduced to estimate the output load resistance for the passivity control. This feature allows the use of an extra output current sensor to be avoided. The structure of the controller derived using passivity theory is very simple. Laboratory experiments performed using a digital signal processor system confirm the robustness of the converter with the passivity-based controller. - Author(s): M. Veerachary
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1516 –1524
- DOI: 10.1049/ip-epa:20045104
- Type: Article
- + Show details - Hide details
-
p.
1516
–1524
(9)
A simple two-loop voltage mode control scheme for the two inductor step-down buck converter is proposed. This is a voltage-mode control scheme in which the external sawtooth generator for the PWM generation is not required. The controller implementation requires only a single error amplifier and gives almost current-mode control performance. The proposed converter gives lower ripple in the input current and reduces the input filtering requirements as compared to the conventional buck topology. To reduce the input current ripple even more, integrated magnetic components with ripple steering phenomena are proposed. For modelling the converter a signal-flow-graph approach is developed to find the converter open, closed-loop small-signal transfer functions and to eliminate the complexity in the mathematical analysis. A unified signal-flow-graph model of the converter, from which the complete behaviour can be predetermined, is developed. Effectiveness of the proposed control scheme and performance improvement is demonstrated through simulations. Experimental results of load voltage regulation against line and load changes are provided to validate the proposed modelling and control scheme. - Author(s): Y.-S. Lee and Y.-Y. Chiu
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1525 –1530
- DOI: 10.1049/ip-epa:20050138
- Type: Article
- + Show details - Hide details
-
p.
1525
–1530
(6)
The proposed zero-current-switching switched-capacitor quasi-resonant DC–DC converter is a new type of bidirectional power flow control conversion scheme. It possesses the conventional features of resonant switched-capacitor converters: low weight, small volume, high efficiency, low EMI emission and current stress. A zero-current-switching switched-capacitor step-up/step-down bidirectional converter is presented that can improve the current stress problem during bidirectional power flow control processing. It can provide a high voltage conversion ratio using four power MOSFET main switches, a set of switched capacitors and a small resonant inductor. The converter operating principle of the proposed bidirectional power conversion scheme is described in detail with circuit model analysis. Simulation and experiment are carried out to verify the concept and performance of the proposed bidirectional DC–DC converter. - Author(s): J. Mróz
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1531 –1538
- DOI: 10.1049/ip-epa:20045219
- Type: Article
- + Show details - Hide details
-
p.
1531
–1538
(8)
During startup an electric motor can be subject to severe electrical and thermal loads. These loads, despite their relatively short durations, significantly affect motor's lifetime and reliability. The use of the double squirrel-cage arrangement has resulted in the improvement of the startup coefficients for induction motors. However, the cage is still subject to non-uniform thermal loads and, in consequence, to overheating. These transient loads are particularly heavy during a prolonged startup, routinely encountered under tough industrial operating conditions, for example when attempting to start a motor with a locked rotor. Typical examples are starting a motor powering a longwall shearer buried under a collapsed coal face or an overloaded coal mill. A methodology is presented to compute the temperature field of a double squirrel-cage and the core of an induction motor. The procedure employs a three-dimensional model of the motor heating obtained using the control volume method. The model provides the basis for calculating the stress field within the cage. The input data to the model can be obtained from the motor windings specification sheet. The thermomechanical analyses can be performed during the design and construction phases, and may facilitate motor performance optimisation. - Author(s): P.N. Tekwani ; R.S. Kanchan ; K. Gopakumar
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1539 –1555
- DOI: 10.1049/ip-epa:20050166
- Type: Article
- + Show details - Hide details
-
p.
1539
–1555
(17)
The simultaneous elimination of common-mode voltage and DC-link capacitor voltage imbalance is achieved in a five-level inverter scheme for an induction motor drive throughout its operating range. A dual five-level inverter-fed open-end-winding induction motor structure is used for the proposed drive. Initially, the operating limitations of achieving this dual task for the five-level inverter configuration are investigated for a single DC power supply. Subsequently, a switching strategy for a five-level inverter topology with two DC power supplies is proposed to achieve the dual task over the entire speed range of the drive. The proposed drive offers a simple power-bus structure with more redundant switching combinations for inverter voltage vectors, and requires a lower voltage-blocking capacity of the power devices as compared with the conventional single five-level inverter-fed drive. As only the availability of redundant switching combinations for inverter voltage vectors is exploited, the dual task is achieved without disturbing the fundamental component of the inverter output voltage and the scheme does not need any extra control circuit hardware. Experimental verification of the proposed scheme is done on a 1.5 kW induction motor drive in the linear as well as overmodulation range. - Author(s): R.-J. Wai and J.-D. Lee
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1556 –1564
- DOI: 10.1049/ip-epa:20050198
- Type: Article
- + Show details - Hide details
-
p.
1556
–1564
(9)
The study mainly focuses on the development of three model-free control strategies including a simple proportional-integral-differential (PID) scheme, a fuzzy-neural-network (FNN) control and an adaptive control for the positioning of a hybrid magnetic levitation (maglev) system. In general, the lumped-parameters dynamic model of a hybrid maglev system can be derived from the energy balance. In practice, the mathematical model can not be established precisely because this hybrid maglev system is inherently unstable in the levitated direction, and the relationships between current and electromagnetic force are highly nonlinear. To cope with the unavailable dynamics, model-free control design is used to handle the system behaviour. In this study the experimental results of PID, FNN and adaptive control schemes for the hybrid maglev system are reported. As can be seen from performance comparisons, the adaptive control system yields favorable control performance superior to that of PID and FNN control systems. Moreover, it not only has a learning ability similar to that of FNN control but also the simple control structure of PID control. - Author(s): G. Kang and K. Nam
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1565 –1572
- DOI: 10.1049/ip-epa:20045185
- Type: Article
- + Show details - Hide details
-
p.
1565
–1572
(8)
The movement of a linear induction motor (LIM) causes eddy currents in the secondary conductor sheet at the entry and the exit of the primary core. The eddy currents of the sheet tend to resist sudden flux variation, allowing only gradual change along the airgap. Hence, the so-called ‘end effect’ causes not only the losses but also airgap flux profile variation changes depending on the speed. In this work, an equivalent circuit model of LIM is developed following Duncan's per phase model. It is then transformed into a synchronous reference frame which is aligned with the secondary flux. Also, a field orientation control scheme is developed which accounts for the end effect. The validity of the proposed LIM model is demonstrated by comparing experimental and simulated voltage current relations. With the proposed control scheme, the (secondary) flux-attenuation problem due to the end effect is shown to be resolved in the high-speed range. - Author(s): S.-H. Choi ; J.-S. Ko ; I.-D. Kim ; J.-S. Park ; S.-C. Hong
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1573 –1577
- DOI: 10.1049/ip-epa:20045200
- Type: Article
- + Show details - Hide details
-
p.
1573
–1577
(5)
A deadbeat load torque observer with a system parameter compensator that can be used to improve the performance of a permanent-magnet synchronous motor in a precision position control system is presented. The compensator makes real systems work as it in a nominal parameter system. Therefore, the observer has a performance level equivalent to that obtained if there is no parameter variation. Noise effects are reduced by the use of past-filter implimented using a moving-average process. A comparison study on the system response for a convertional deadbeat gain observer and the proposed parameter-compensated deadbeat observer is performed. The proposed system can be used to cancel out any steady-state or transient position errors created by external disturbances such as friction, load torque or chattering effects. - Author(s): H.-L. Do
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1578 –1584
- DOI: 10.1049/ip-epa:20050067
- Type: Article
- + Show details - Hide details
-
p.
1578
–1584
(7)
A single-stage single-switch power factor correction AC/DC converter is proposed in which the power factor correction (PFC) inductor is connedted to a tap on the primary winding of the DC/DC flyback converter stage; there is direct energy transfer of a part of the input energy to the output and theDC-bus voltage feedback. The additional discharge path in the PFC inductor and DC-bus voltage feedback effectively suppresses the DC-bus voltage and increases the overall efficiency. Experimental results for a 60 W converter at a constant switching frequency of 70 kHz are obtained to show the performance of the proposed converter. It is shown that the voltage across the DC-bus capacitor can be held below 405 V even though the converter operates in a wide range of input voltages (90∼265 V AC) and the measured input current harmonics satisfy the IEC 61000-3-2 Class D requirements. - Author(s): Z.Y. Pan and F.L. Luo
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1585 –1594
- DOI: 10.1049/ip-epa:20050128
- Type: Article
- + Show details - Hide details
-
p.
1585
–1594
(10)
The permanent magnet (PM) brushless DC motor (BDCM) has been widely used in industrial applications because of its low inertia, fast response, high power density, high reliability and no maintenance requirements. It exhibits the operating characteristics of a conventional commutated permanent magnet DC motor but eliminates the mechanical commutators and brushes. Consequently, many problems associated with brushes and commutators are eliminated. A steady state reference current (SSRC) determination technique based on a neural network is proposed for the PM BDCM drive system. A conventional controller combined with this technique can improve system response speed, and reduce overshoot and oscillation. The design of the conventional controller is introduced. The SSRC determination technique is described in detail. Hardware implementation and experimental results are proposed. The drive system is tested under PI and fuzzy control. - Author(s): M. Ikeda and T. Hiyama
- Source: IEE Proceedings - Electric Power Applications, Volume 152, Issue 6, p. 1595 –1602
- DOI: 10.1049/ip-epa:20050173
- Type: Article
- + Show details - Hide details
-
p.
1595
–1602
(8)
An artificial neural network based computer-aided designing system together with the manufacturing cost estimation system for industrial induction motors is presented. The aim is to contribute to the understanding of the new system. Based on the actual design data for various types of induction motors, the cascaded artificial neural networks have been trained to calculate the output of the fundamental data and parameters. After the training, the dimensions and the basic parameters have been estimated quite accurately from the specification of the individual induction motor on the cascaded three artificial neural networks. The manufacturing cost of the individual motor has also been predicted precisely by using the neural network at the last stage of design. The proposed neural network based designing system including the cost estimation system is quite efficient in reducing the manpower of the designing process and also in enabling optimal design in a restricted time period without the knowledge of experts.
High-performance plasma-display-panel ‘sustain’ power supply
Dynamical behaviour of a three-phase generator due to unbalanced magnetic pull
Application of three-phase resonant converter in high power DC supplies
Equivalent circuit model for an insulated gate bipolar transistor
Structural analysis of low-speed axial-flux permanent-magnet machines
Core faults in large generators
Pull-out torque of fractional-slot PM-motors with concentrated winding
PDM and PFM hybrid control of a series-resonant inverter for corona surface treatment
Control of high-performance switched-mode rectifier system
Analysis of a stand-alone permanent-magnet synchronous generator using a time-stepping coupled field-circuit method
Spice-based flux-linkage model for switched reluctance motors
Unbalanced DC-Link voltage regulation in a back-to-back 3-level PWM converter for a double-fed induction motor-generator
Type-2 fuzzy controller design using a sliding-mode approach for application to DC–DC converters
Adaptive fuzzy position control for electrical servodrive via total-sliding-mode technique
Online capacitance estimation of DC-link electrolytic capacitors for three-phase AC/DC/AC PWM converters using recursive least squares method
Passivity-based control of a phase-shifted resonant converter
Two-loop voltage-mode control of coupled inductor step-down buck converter
Zero-current-switching switched-capacitor bidirectional DC–DC converter
Temperature field of a double squirrel-cage motor during startup
Five-level inverter scheme for an induction motor drive with simultaneous elimination of common-mode voltage and DC-link capacitor voltage imbalance
Performance comparisons of model-free control strategies for hybrid magnetic levitation system
Field-oriented control scheme for linear induction motor with the end effect
Precise position control using a PMSM with a disturbance observer containing a system parameter compensator
Single-stage single-switch power factor correction AC/DC converter
Steady state reference current determination technique for brushless DC motor drive system
ANN based designing and cost determination system for induction motor
Most viewed content for this Journal
Article
content/journals/ip-epa
Journal
5
Most cited content for this Journal
We currently have no most cited data available for this content.
