IEE Proceedings - Electric Power Applications
Volume 150, Issue 1, January 2003
Volumes & issues:
Volume 150, Issue 1
January 2003
-
- Author(s): F.-J. Lin ; W.-D. Chou ; P.-K. Huang
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 1 –13
- DOI: 10.1049/ip-epa:20030053
- Type: Article
- + Show details - Hide details
-
p.
1
–13
(13)
An adaptive sliding-mode controller based on real-time genetic algorithms (GAs) is developed for an induction motor (IM) servo drive. First, an adaptive sliding-mode controller with an integral-operation switching surface is investigated, in which a simple adaptive algorithm is utilised to estimate the bound of uncertainties. Since the adaptation parameters for the above adaptive algorithm are constants, favorable response usually cannot be obtained due to the existence of uncertainties. Therefore, a real-time GA is developed to search the optimal adaptation parameters on-line. The position control for an IM servo drive using the proposed control strategy is illustrated. Simulated and experimental results show that the proposed controller provides high-performance dynamic characteristics and is robust with regard to plant parameter variations and external load disturbance. - Author(s): P. Brogan and R. Yacamini
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 14 –20
- DOI: 10.1049/ip-epa:20030054
- Type: Article
- + Show details - Hide details
-
p.
14
–20
(7)
A method is presented by which the harmonic current in a two-level, network-connected inverter can be controlled for use as an active filter in addition to supplying real power, via the intermediate DC link to a motor inverter. With the use of variable speed drives incorporating sinusoidal rectifiers there exists the possibility that the PWM-modulated voltage of the sinusoidal front end, or network rectifier, could be modulated to inject harmonic current into the network. This would allow compensation of harmonic voltage distortion caused by other nonlinear loads already connected to the busbar. The use of a commercially available variable speed drive with sinusoidal rectifier is described which, from the distorted busbar voltage, derives the correct current references with which to compensate for 5th- and 7th-harmonic voltage distortion. The method by which the harmonic current references are determined and the method by which they are controlled is presented in detail. The concept of using mains voltage distortion at the point of common coupling as feedback is justified. - Author(s): S.H. Li and C.M. Liaw
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 21 –30
- DOI: 10.1049/ip-epa:20020582
- Type: Article
- + Show details - Hide details
-
p.
21
–30
(10)
The dynamic modelling and digital controller design for a soft-switching mode rectifier (SSMR) are presented. First, the design and implementation of an SSMR are described. This SSMR is formed from the conventional boost-type SMR by adding an auxiliary resonant branch, and zero-voltage-transition (ZVT) soft switching is achieved by applying suitably delayed pulse width modulation (PWM) signals to the main and auxiliary switches. In addition to the power circuit, sophisticated control is indispensable for the SSMR to have good sinusoidal line current tracking performance under a well-regulated DC output voltage. In dealing with the current control loop, the small-signal model is first derived using a state-space averaging method, and accordingly, the digital current-controlled PWM scheme is designed. As to the voltage control loop, its dynamic model is first estimated from measurements. Then, a quantitative design procedure is developed to find the parameters of the digital voltage controller according to the prescribed control specifications. The PWM switching scheme and the designed controllers of the SSMR are realised digitally using a DSP-based control computer. The effectiveness of the designed controllers is verified by some simulation and experimental results. - Author(s): S. Moisseev ; S. Hamada ; M. Nakaoka
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 31 –38
- DOI: 10.1049/ip-epa:20030055
- Type: Article
- + Show details - Hide details
-
p.
31
–38
(8)
A double two-switch forward type high-frequency transformer linked zero-voltage and zero-current mode soft-switching (ZVZCS) pulse width modulation (PWM) DC–DC power converter using IGBTs is presented. A new circuit configuration of the isolated type PWM soft-switching converter is proposed to reduce idling and circulating currents in the main circuit without using complex additional active auxiliary resonant snubber circuits and power semiconductor devices, and to decrease the peak voltage across power devices, and their peak current stresses. This soft-switching PWM DC–DC power converter has the unique advantages of less power circuit components and power semiconductor devices, high power conversion efficiency, constant frequency duty cycle control scheme, cost-effective and stable soft-switching operating range under wide load variations for high power applications. The basic operating principle of the soft-switching power converter treated here is illustrated using periodic steady-state circuit analysis for each mode equivalent circuit. The effectiveness of the proposed soft-switching DC–DC power converter built and tested as a 500 W–100 kHz breadboard setup using IGBTs is verified and evaluated on the basis of simulation and theoretical circuit analysis. - Author(s): C.S. Moo ; H.C. Yen ; Y.C. Hsieh ; Y.C. Chuang
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 39 –44
- DOI: 10.1049/ip-epa:20020688
- Type: Article
- + Show details - Hide details
-
p.
39
–44
(6)
The design of passive filters for attenuating conducted electromagnetic interference (EMI) is tedious work usually involving a trial-and-error process. It is also possible for the EMI filter that is afterwards equipped to interfere with the function of the original circuit. This perplexing problem is especially critical for a power electronic converter with power-factor correction, which needs another passive filter for removing high-frequency harmonics from the input line current. To solve this problem, an alternative approach with consecutive orthogonal arrays is proposed. Thereby, both EMI noise reduction and power-factor correction are treated jointly by integrating the two passive filters into a single filter. The method with consecutive orthogonal arrays is applied in order to search the satisfactory parameters of the filter and achieve the goals of low EMI noise and high power factor. By virtue of consecutive orthogonal arrays, the number of experiments can be reduced effectively before a set of satisfactory filter components can be obtained. The design procedure and the inferential rules are illustrated by a design example. - Author(s): K.W.E. Cheng ; M. Liu ; J. Wu
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 45 –61
- DOI: 10.1049/ip-epa:20030056
- Type: Article
- + Show details - Hide details
-
p.
45
–61
(17)
Experimental evidence is provided to verify bifurcation and chaos phenomena, which have been analysed and studied in detail in other publications, in a current-mode controlled Buck-Boost which converter operates at 20 kHz. A discrete model for a Buck-Boost converter under current-mode control is proposed and used for the study. A good agreement between the theoretical study and experimental results is found. - Author(s): M.P. Foster ; H.I. Sewell ; C.M. Bingham ; D.A. Stone ; D. Hente ; D. Howe
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 62 –70
- DOI: 10.1049/ip-epa:20030057
- Type: Article
- + Show details - Hide details
-
p.
62
–70
(9)
A methodology for determining the steady-state operation of resonant power-switching converters is described. The technique, based on cyclic averaging, employs a reduced-order harmonic analysis to obtain the switching transition times which separate different modes during each cycle in the steady state. The internal state variables of the system, in the steady state, are then immediately determined. In comparison with previously published techniques, the methodology has the advantage of allowing any piecewise-linear state–space model of a power converter to be used to predict the steady-state performance without the prerequisite of a transient-based simulation. The simulated and experimental results for a prototype third-order CLC current-output converter are compared to demonstrate that the prediction accuracy is comparable with that of state-variable-simulation models, and that the execution speed is of the same order as that for FHA (first-harmonic analysis). - Author(s): M. Veerachary ; T. Senjyu ; K. Uezato
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 71 –80
- DOI: 10.1049/ip-epa:20020686
- Type: Article
- + Show details - Hide details
-
p.
71
–80
(10)
A photovoltaic generator exhibits nonlinear voltage-current characteristics and its maximum power point varies with solar radiation. A two-cell interleaved boost converter with coupled inductors is used to match the photovoltaic system to the load and to operate the solar cell array at maximum power point. A maximum power point tracking algorithm is developed using only load voltage information, eliminating the array current detection. The present converter system has the advantages of low ripple content, both on the load and source side, improved efficiency and reduced switch stress, as compared to noncoupled two-cell interleaved converters. As a result, a lower value of array capacitance is sufficient for smoothing the array voltage and current. Analytical expressions for the photovoltaic source and interleaved boost converter, corresponding to maximum power point operation of the SCA, are derived. Experimental results are presented to demonstrate the suitability of this converter system. Few experimental observations are also presented for partial shading conditions. Further, a comparative study of coupled and noncoupled interleaved boost converters for photovoltaic applications is made. These studies reveal that, by introducing coupling among the parallel branch inductors, it is possible to improve steady-state performance while maintaining the dynamic performance of the photovoltaic system. - Author(s): H. Kiyotake ; H. Okada ; K. Ishizaka ; R. Itoh
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 81 –87
- DOI: 10.1049/ip-epa:20020740
- Type: Article
- + Show details - Hide details
-
p.
81
–87
(7)
A switch-mode voltage-doubler rectifier using a capacitive energy storage/transfer mechanism is studied in the paper. The voltage doubling can be provided by means of a high frequency pumping action of the capacitor. Moreover, the rectifier is operated in the switching state for forcing the input current to follow its sinusoidal reference independently of the working conditions by discharging the capacitor to the circuit consisting of the supply and the boost inductor. The arrangement tested, using three insulated-gate bipolar transistors and a micro-computer as a PI controller, is used to investigate experimentally the steady-state and transient characteristics. The experimental and simulated results confirm that the rectifier can be operated with a good quality input current under steady-state and transient conditions. - Author(s): K.Y. Cho and J.Y. Lim
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 88 –96
- DOI: 10.1049/ip-epa:20030058
- Type: Article
- + Show details - Hide details
-
p.
88
–96
(9)
A power-converter circuit for a switched reluctance motor is proposed. It consists of one switching device per phase and a dump capacitor, auxiliary switch and flyback transformer. In this converter circuit, the demagnetising current of an off-going phase is stored in the dump capacitor and is returned to the DC link capacitor through the transformer. The dump capacitor voltage can be controlled by the duty ratio control of the auxiliary switch. The auxiliary switch is PWM-controlled in high frequency, so that the size of the transformer can be reduced. The voltage rating of the auxiliary switch and dump capacitor is lower than that of the main switches and DC link capacitor. The modes of operation are described and the effectiveness of the proposed converter circuit is verified through simulation and experiment. - Author(s): S.D. Calverley ; G.W. Jewell ; R.J. Saunders
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 97 –105
- DOI: 10.1049/ip-epa:20020687
- Type: Article
- + Show details - Hide details
-
p.
97
–105
(9)
An investigation of the stress distribution in a four-pole switched reluctance rotor operating at high speed is presented. Two-dimensional finite element analysis is employed over a wide range of rotor geometries and a series of generalised design guidelines are established to facilitate the rapid calculation of the peak rotor stress. The radial expansion and moment of inertia of the rotor are also calculated. - Author(s): P.E. Cavarec ; H. Ben Ahmed ; B. Multon
- Source: IEE Proceedings - Electric Power Applications, Volume 150, Issue 1, p. 106 –116
- DOI: 10.1049/ip-epa:20020628
- Type: Article
- + Show details - Hide details
-
p.
106
–116
(11)
A realistic comparison of several electromagnetic architectures for high force density actuators is presented. Four equivalent architectures are chosen and computed with a two-dimensional finite-element model. For each architecture, size is optimised to maximise the force/volume ratio. This optimisation step is performed with a fixed mechanical airgap. A thermal model is then used to calculate the current density in the coils. Results show that global-coil architecture performance increases more sharply than other architectures; a scaling effect is thereby introduced for global-coil architectures. A global-coil multi-airgap actuator is presented to illustrate the theoretical results.
Adaptive sliding-mode controller based on real-time genetic algorithm for induction motor servo drive
Harmonic control using an active drive
Modelling and quantitative direct digital control for a DSP-based soft-switching-mode rectifier
Double two-switch forward transformer linked soft-switching PWM DC–DC power converter using IGBTs
Integrated design of EMI filter and PFC low-pass filter for power electronic converters
Experimental study of bifurcation and chaos in the Buck-Boost converter
High-speed analysis of resonant power converters
Maximum power point tracking of coupled inductor interleaved boost converter supplied PV system
Single-phase voltage-doubler rectifier using a capacitive energy storage/transfer mechanism
Power converter circuit for a switched reluctance motor using a flyback transformer
Calculation of centrifugal stress in four-pole switched-reluctance rotors
Force density improvements from increasing the number of airgap surfaces in synchronous linear actuators
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.
