A vector controlled MCT matrix converter induction motor drive with minimized commutation times and enhanced waveform quality

Wheeler, Pat; Clare, John; Empringham, Lee

doi:10.1109/ias.2002.1044127

Cited by 65 publications

(24 citation statements)

References 7 publications

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“…From the previous equation, it is clear that this fault will affect the value of ˆC u when the input current and output voltage space vectors impose the simultaneous closing of switches 5 I and 1 R or 2 I and 4 R ( Fig. 1(a)).…”

Section: A Output Error Voltagesmentioning

confidence: 98%

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Modulated error voltages for the diagnosis of faults in matrix converters

Cruz

Ferreira

Mendes

et al. 2009

2009 IEEE Energy Conversion Congress and Exposition

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This paper presents a new method for the diagnosis of faults in matrix converters. The method is based on the monitoring of nine modulated error signals, each one associated to a bidirectional power switch of the converter. Using the proposed technique, an open-circuit in a given switch is detected whenever the associated modulated error voltage signal rises above an established threshold limit. This new method allows a fast detection and location of the faulty switches, independently of the type of load of the converter or its working conditions, namely amplitude and frequency of the output voltages.Simulation and experimental results demonstrate the validity of the proposed technique to detect open-circuit faults in matrix converters, even with more than one faulty switch at the same time.

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Section: A Output Error Voltagesmentioning

confidence: 98%

“…Matrix converter drives have received considerable attention in the last decade due to their inherent advantages such as their bidirectional power flow capability and high degree of integration, being recommended for applications requiring a critical volume/weight ratio or operating at high temperatures [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Modulated error voltages for the diagnosis of faults in matrix converters

Cruz

Ferreira

Mendes

et al. 2009

2009 IEEE Energy Conversion Congress and Exposition

View full text Add to dashboard Cite

show abstract

“…The converter offers an all-silicon solution for ac-ac power conversion. This type of converters has the advantages of bi-directional power flow, sinusoidal input and output waveforms, four-quadrant operation capability, minimal requirement for reactive energy storage components and depending on the modulation technique, it can be arranged that unity displacement factor is seen at the supply side irrespective of the load type [4,5]. MCs remove the need for the large reactive energy storage components used in conventional inverter based converters.…”

Section: Introductionmentioning

confidence: 98%

Implementation of EKF based sensorless drive system using vector controlled PMSM fed by a matrix converter

Aydoğmuş

Sünter

2012

International Journal of Electrical Power & Energy Systems

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“…In addition, the switch commutation is a complex process that introduces dead-times similar to those of voltage source inverters. These converter nonlinearities, together with the sensor offsets, could affect the estimation of the voltage applied to the load [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Assessment of an induction motor drive for high speed operation based on matrix converter

Casadei

Mengoni

Serra

et al. 2007

2007 European Conference on Power Electronics and Applications

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The control scheme of a speed-sensorless induction motor drive fed by a matrix converter is presented. The proposed scheme allows the motor to exploit the maximum torque capability at any speed, shows a moderate dependence on the motor parameters, and a fast torque response, even in the fieldweakening speed range. The behaviour of the matrix converter is assessed by means of experimental results. IntroductionInduction motor drives fed by Matrix Converter (MC) can theoretically offer better performance than traditional drives based on voltage source inverters [1]. The advantages that are often cited are the compactness, the bidirectional power flow and the higher current quality. The input currents are sinusoidal and the power factor is near unity. Furthermore, braking resistances are not necessary from a theoretical point of view, since the power flow during braking can be reverted, thus leading to a regenerative operation.However, the use of MC poses some problems. First of all, to obtain a good quality of the output currents, the input voltages should be constantly measured in order to adapt the duty-cycles of the output voltages in presence of input voltage harmonics or disturbances, thus risking system instability,[2], [3]. Secondly, MC bidirectional switches cause an higher voltage drop compared to VSI power switches, since the output current has to pass through two components in series, usually an IGBT and a diode. In addition, the switch commutation is a complex process that introduces dead-times similar to those of voltage source inverters. These converter nonlinearities, together with the sensor offsets, could affect the estimation of the voltage applied to the load [4], [5].Finally, some studies have shown that the quality of the input current deteriorates if the source voltage is unbalanced or distorted. The same happens if the load currents are unbalanced or distorted [6].All these aspects should be taken into account when assessing the performance of an electric motor drive fed by a MC. Some papers describing drives based on MC have already been presented. Some studies have been made to transfer the existing control techniques for voltage source inverters to MCs, such as constant V/Hz, field-oriented control and direct torque control [7]- [12].Electric drives are often requested to deliver constant power at speed higher than the rated one. However so far the performance of drives fed by MC and operating in the field-weakening region has not been examined in details.When the induction motors are used for applications at high speed, it is desirable to retain the maximum torque capability in the field weakening region. Several papers about this issue were presented for drives fed by traditional VSI [13]- [18]. According to these field weakening algorithms, the optimal flux value of the motor should be updated by means of look-up tables or explicit expressions containing the motor parameters and quantities such as the motor speed, the motor currents, the dc-link voltage and the requested torque. However,...

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A vector controlled MCT matrix converter induction motor drive with minimized commutation times and enhanced waveform quality

Cited by 65 publications

References 7 publications

Modulated error voltages for the diagnosis of faults in matrix converters

Modulated error voltages for the diagnosis of faults in matrix converters

Implementation of EKF based sensorless drive system using vector controlled PMSM fed by a matrix converter

Assessment of an induction motor drive for high speed operation based on matrix converter

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