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Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual

Date 17-21 June 2001

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  • 2001 IEEE 32nd Annual Power Electronics Specialists Conference [front matter]

    Publication Year: 2001 , Page(s): i - xxxiv
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    Freely Available from IEEE
  • Author index

    Publication Year: 2001 , Page(s): 2229 - 2234
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    Freely Available from IEEE
  • Analysis of a new quantum resonant rectifier topology with high-quality input waveforms

    Publication Year: 2001 , Page(s): 1812 - 1817 vol. 4
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (392 KB) |  | HTML iconHTML  

    This paper presents a new third-order T-connected series-loaded resonant circuit which overcome the inherent disadvantages of the series resonant converter operating as a low harmonic rectifier. The inclusion of a parallel resonant inductor increases the conduction angle of the diode bridge, thus reducing the harmonic content of the line current and then extending the power handling capability View full abstract»

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  • Analysis and experimentation of a forward converter with active clamping and output rectifier using a center tapped transformer

    Publication Year: 2001 , Page(s): 1767 - 1772 vol. 4
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (408 KB) |  | HTML iconHTML  

    This paper proposes a study of a forward DC/DC power converter topology where the isolating transformer has its core reset by active voltage clamping, using a capacitor and an additional switch. This technique makes feasible the soft commutation of the two switches, allowing an increase of the commutation frequency and a volume reduction of the inductors involved. The operating principle and the small-signal characterization of the converter are presented, making it possible to foresee the clamping circuit effect in the dynamic response. Experimental results of a 550 W prototype are also presented View full abstract»

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  • Generalized predictive control (GPC)-ready for use in drive applications?

    Publication Year: 2001 , Page(s): 1839 - 1844 vol. 4
    Cited by:  Papers (59)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (440 KB) |  | HTML iconHTML  

    A usual argument against GPC is its demand for processing power. In industry, however, this is not a serious argument if better control performance can be reached. As the development of new processors with increased performance takes place rather rapidly, the lag of processing power never was a long-term issue to prevent new algorithms from being introduced. This paper presents a practical realization of generalized predictive control (GPC) for field oriented control of induction machines. The results are compared with conventional PI-control. Considering the strong real time conditions of drive applications, implementation aspects according to the great calculation effort in case of GPC are discussed to contribute to closing the gap between theory and practice View full abstract»

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  • Study of DSP controlled superconducting magnetic energy storage in dynamic simulation test of power system

    Publication Year: 2001 , Page(s): 2185 - 2190 vol. 4
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (352 KB) |  | HTML iconHTML  

    This paper introduces a double-DSP controlled power-conditioning-system (PCs) for experimental SMES. Voltage-source-converter (VSC) with a chopper is employed in the experimental sample. The VSC is a four-quadrant-AC/DC converter and chopper is a two-quadrant-DC/DC converter, they can perform charging to or discharging from the coil. The proposed system is feasible by results of experiment View full abstract»

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  • Self-oscillating electronic ballast with dimming control

    Publication Year: 2001 , Page(s): 1818 - 1823 vol. 4
    Cited by:  Papers (18)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (472 KB) |  | HTML iconHTML  

    Self-oscillating electronic ballast is one of the simplest and most cost effective ballasts for driving fluorescent lamps. Disadvantageously, however, the operating frequency of the self-oscillating resonant circuit is, by the nature of its operation, load dependent, and thus is very difficult to control. This paper explores a novel, self-oscillating, dimmable electronic ballast ideal for low cost dimming application. The operating frequency can be easily adjusted to regulate the lamp power and dim the lamp. A prototype is implemented and the operation principle is verified by the experimental results View full abstract»

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  • A high efficiency isolated DC-DC converter with high-output voltage for TWTA telecommunication satellite applications

    Publication Year: 2001 , Page(s): 1982 - 1987 vol. 4
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (416 KB) |  | HTML iconHTML  

    An isolated DC-DC converter for high-voltage output voltage applications is presented in this paper. The proposed converter is specially indicated for application where there are necessary low volume and mass and high-efficiency (94%), operating with unregulated low input voltage. The main operation characteristics are soft-commutation in all power switches, constant switching frequency, PWM modulation and integration of the components intrinsic elements (distributed transformer capacitance, leakage inductance and power switches capacitance) View full abstract»

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  • Heat transfer coefficient for water cooled heat sink: application for standard power modules cooling at high temperature

    Publication Year: 2001 , Page(s): 1938 - 1943 vol. 4
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (672 KB) |  | HTML iconHTML  

    This study presents an overview of water cooling methods used in the power electronic field. The first one uses the classical method with separated power module and cooling device. The second one deals with high reduction of conductive thermal resistance and could predominately be the final cooling solution in the near future. The last one, foreseen for future applications, consists in designing the power module and the cooling device in the silicon material, improving even more the overall thermal resistance. Each alternative may require a good knowledge of the thermal exchange laws in the heat exchanger. The Nusselt number, as a characteristic thermal parameter proposed in the literature, is not always realistic for all kinds of cooling devices. The work focuses on that correlated value determination taking into account the channel geometry, the fluid flow rate and its temperature. Then, the obtained value is used to make a real optimisation of the cooling device View full abstract»

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  • Overview of reduced parts converter topologies for AC motor drives

    Publication Year: 2001 , Page(s): 2019 - 2024 vol. 4
    Cited by:  Papers (23)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (440 KB) |  | HTML iconHTML  

    In this paper, various reduced parts converter topologies and control strategies for power factor correction and motor control are reviewed and systematic design methodology is developed. From this investigation, the converter topologies could be mainly categorized into cascade type and unified type. The detailed operational principles are examined and the performance comparison Is derived to illustrate merits and limitations of the converters. Simulation results are provided to help the better understanding of the theoretical description and several experimental results are presented on prototype induction motor and brushless DC (BLDC) motor drives, along with cascade and unified type converters View full abstract»

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  • A novel hysteresis current controller for multilevel single phase voltage source inverters

    Publication Year: 2001 , Page(s): 1845 - 1850 vol. 4
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (472 KB) |  | HTML iconHTML  

    The application and benefits of hysteresis current control for two level voltage source inverters are well understood, but the extension of the strategy to multilevel inverters is much less established. Previous approaches have used either multiple hysteresis bands or a time based lockout strategy to decide when to switch to successive voltage levels, but these approaches are either complex, and/or have restricted applicability. This paper presents a simple hysteresis strategy which uses the slope of the current error to confine this error to within a single hysteresis band, by recursively stepping the inverter output between successive voltage levels when the hysteresis band is exceeded. The algorithm can be used with any level of multilevel inverter, and achieves a robust steady state operation that fully utilises the multiple DC levels available. Theory, simulation and experimental results are presented View full abstract»

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  • An integrated resonant module for a high power soft-switching converter

    Publication Year: 2001 , Page(s): 1944 - 1948 vol. 4
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (600 KB) |  | HTML iconHTML  

    An integrated series resonant module (ISRM) for a 100 kW 3-phase ZCT inverter is constructed from planar ferrites, flat conductors and high permittivity dielectrics. The unit is assembled by stacking planar layers and clamping them together. From the test results, it appears as an excellent alternative for conventional discrete resonant components. Some design issues are also discussed View full abstract»

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  • A robust, on-line turn-fault detection technique for induction machines based on monitoring the sequence component impedance matrix

    Publication Year: 2001 , Page(s): 2217 - 2223 vol. 4
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (560 KB) |  | HTML iconHTML  

    A simple and robust sensorless technique for online stator winding turn fault detection based on monitoring an off-diagonal term of the sequence component impedance matrix is proposed in this paper. Due to the destructive and rapidly propagating nature of insulation failure, it is critical to detect turn faults in an early stage to minimize the financial loss. The motor nonidealities such as the variation in the supply voltage unbalance, slip-dependent influence of inherent motor asymmetry, and measurement errors must be taken into account in order to reliably detect a turn fault in its incipient stage. Simulation and experimental results on a 5 hp induction machine are given to confirm the validity of the proposed method. It is shown that the proposed turn fault detection scheme is simple and is capable of providing reliable fault detection that is immune to the motor nonidealities View full abstract»

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  • Dissipativity-based adaptive and robust control of UPS in unbalanced operation

    Publication Year: 2001 , Page(s): 1862 - 1867 vol. 4
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (496 KB) |  | HTML iconHTML  

    In this paper we investigate the output voltage control for three phase uninterruptible power supply (UPS) using controllers based on ideas of dissipativity. To provide balanced sinusoidal output voltages even in the presence of nonlinear and unbalanced loads, we first derive a dissipativity-based controller using a conventional αβ (fixed frame) representation of system dynamics and a frequency-domain representation of system disturbances. Adaptive refinements have been added to the controller to cope with parametric uncertainties. Second, based on the structure of the first adaptive controller and avoiding estimation of one of the parameters, we propose a controller, which leads to an LTI closed loop system and which is directly connected to synchronous frame harmonic voltage control. For the proposed solution, a sufficient condition in terms of the design parameters is presented to guarantee stability of the desired equilibrium and robustness against some parameter uncertainties. Finally, simulation and experimental results on a three-phase prototype show the effectiveness and advantages of the proposed approach View full abstract»

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  • Design, optimization and electromagnetic modeling of integrated passive components for power electronic

    Publication Year: 2001 , Page(s): 1932 - 1937 vol. 4
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (584 KB) |  | HTML iconHTML  

    New structures of integrated passive components, based on both planar and cylindrical sub-components are introduced. This paper investigates the trade-offs between dimensions, thermal behavior and electromagnetic performances of the structures. The electromagnetic limits are analysed in terms of physical dimensions and thermal dissipation capabilities. An example of a forward SMPS output filter is used to illustrate the analysis. A high frequency electrical model of the sub-components is then proposed. This model is based on the transmission line theory View full abstract»

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  • Mathematical modeling of cross-regulation problem in flyback converters

    Publication Year: 2001 , Page(s): 2072 - 2077 vol. 4
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (352 KB) |  | HTML iconHTML  

    The cross regulation problem in flyback converters with dual outputs is studied in this paper. The mathematical modeling for the cross regulation of the converter is presented. The experimental results agree well with the theoretical prediction. Further investigation also shows that extra turns wound around the outer leg of the core cannot only boost the voltage of the nonregulated output, but also improve the cross regulation of the converter provided that the extra turn number does not exceed the optimum value View full abstract»

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  • Control system design for a 20 kW wind turbine generator with a boost converter and battery bank load

    Publication Year: 2001 , Page(s): 2203 - 2206 vol. 4
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (344 KB) |  | HTML iconHTML  

    This paper describes the design of a boost type DC/DC converter for a 20 kW wind turbine generator. The generator phase inductance is big enough so no extra DC inductor is required. The electrical system is modeled using the power electronics and motor control software package PSIM, then a current controller is designed. Its steady state and transient performance shows that the generator phase inductance helps to smooth the generator phase current with a reasonable lagging angle. Furthermore, a simple current-torque model is derived for the electrical system. This model together with that of the mechanical system enables the design of the speed control loop based on the turbine tip speed ratio (TSR), the ratio of the blade tip speed to the wind speed. The simulation result based on MATLAB/SIMULINK shows the power tracking with wind variation. The whole control system is being implemented using an embedded controller View full abstract»

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  • Static reactive-power compensator using soft-switching current source inverter

    Publication Year: 2001 , Page(s): 1883 - 1888 vol. 4
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (496 KB) |  | HTML iconHTML  

    This paper describes a static reactive-power compensator using soft-switching scheme. The proposed system is composed of a 3-phase current-source inverter with an H-type soft-switching module, which consists of two semiconductor switches, two diodes, and an L-C resonant circuit. The operation of proposed system was analyzed in detail through theoretical approach and computer simulation with SPICE. A scaled prototype was built and tested for verifying feasibility of hardware implementation. The proposed system would be suitable for high power application with less switching loss View full abstract»

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  • A novel maximum power point tracking technique for PV panels

    Publication Year: 2001 , Page(s): 1970 - 1975 vol. 4
    Cited by:  Papers (4)  |  Patents (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (336 KB) |  | HTML iconHTML  

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk DC/DC converter operating in discontinuous inductor-current or capacitor-voltage mode. The method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated digital computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under different insolation levels and a large insolation level change will be studied View full abstract»

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  • A novel voltage sensorless control technique for a bidirectional AC/DC converter

    Publication Year: 2001 , Page(s): 1899 - 1904 vol. 4
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (440 KB) |  | HTML iconHTML  

    A novel voltage sensorless control technique for a bidirectional AC/DC converter is presented. Only a single current sensor that measures the inductor current is needed in the whole system. The sensed inductor current is used for two functions. The first one is for shaping the current waveform at the AC side and the second one is for deriving the inductor voltage by determining the rate of change of the inductor current. The AC- and DC-side voltages, which are used for AC current synchronization and DC voltage regulation, respectively, are obtained by extracting the envelopes of the derived inductor voltage. Apart from reducing the number of sensing elements, the proposed method has additional advantages of (1) providing inherent electrical isolation and reducing noise coupling between the power circuit and the controller, and (2) having wide operating range. Design criteria for the differentiator and envelope detector circuit are described. The applicability of the proposed method is verified with the experimental results of a prototype View full abstract»

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  • Effect of the geometry on the aging of metalized polypropylene film capacitors

    Publication Year: 2001 , Page(s): 2061 - 2066 vol. 4
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (680 KB) |  | HTML iconHTML  

    Aging of MPPF capacitors have been studied in this paper with the aim to improve their reliability regarding their design. The statistical approach showed that the failure mode may be represented by two parameter Weibull distribution and the experimental approach proved that a long capacitor deteriorates faster than a plate-shaped capacitor having the same features View full abstract»

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  • Multi-level, uni-directional AC-DC converters, a cost effective alternative to bi-directional converters

    Publication Year: 2001 , Page(s): 1911 - 1916 vol. 4
    Cited by:  Papers (8)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (616 KB) |  | HTML iconHTML  

    A uni-directional, multi-level power converter family, to which the Vienna rectifier belongs, is proposed. Its features are studied, and a cost-performance analysis is also presented View full abstract»

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  • Comparative performance evaluation between the S4R and the S3R regulated bus topologies

    Publication Year: 2001 , Page(s): 1963 - 1969 vol. 4
    Cited by:  Papers (13)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (960 KB) |  | HTML iconHTML  

    The S3R and S4R space power converter topologies are shown to be suitable for regulated bus power systems. The S3R topology has been used in space applications for several decades, mainly in GEO projects. However, the power involved in actual spacecraft reaching the tens of kW as well as the increasing demands of LEO applications requiring fast recharges of the batteries, show the limits of the capability of the S3R topology. A comparative performance evaluation of the two topologies is presented by the authors in this paper View full abstract»

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  • Energy control of multi-switch power supplies; an application to the three-phase buck type rectifier with input filter

    Publication Year: 2001 , Page(s): 1831 - 1836 vol. 4
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (488 KB) |  | HTML iconHTML  

    The first part of the paper presents a systematic method for the modeling of power electronic networks with multiple switches using the classical Lagrangian framework. The main advantage of this method is its structured and general character compared to other methods. The power of working with Lagrangian dynamics, especially when very large networks have to be analyzed, is that Kirchhoff's voltage law is given in advance, while the interconnection structure is based on Kirchhoff's current laws only. The physical nonlinear structure of these systems is revealed and can be used for feedback controller design and stability analysis. The second part concentrates on the proposed passivity-based controller design technique based on the Lagrangian structure. Besides its physical significance, this approach appears to be an interesting alternative when dealing with the problem of input filter influences in power electronic systems. With this technique, artificial damping is injected such that the impedances of the in- and output filters can be matched. In this way power is not reflected and resonance problems, especially during the start-up and transient conditions, are minimized. A unity power factor passivity-based control algorithm for the three-phase buck type rectifier with an input filter is proposed that does not require current sensors but only measurements of the capacitor voltages View full abstract»

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  • A very simple DC/DC converter using piezoelectric transformer

    Publication Year: 2001 , Page(s): 1755 - 1760 vol. 4
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (600 KB) |  | HTML iconHTML  

    Piezoelectric transformers (PTs) have lately been looked upon as an attractive solution to reduce size and weight in AC/DC converters. This paper presents a topology that includes such a device while minimizing the number of additional components required for an adequate performance. An 8-watt AC/DC adapter (110 VAC, 12 VDC ) operating at frequencies around 500 kHz is obtained using this topology View full abstract»

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