Study of dead time of PWM rectifier of Voltage-source inverter without DC-link components and its operating characteristics of induction motor

Iimori, Kenichi; Shinohara, Kazuhiko; Yamamoto, Kichiro

doi:10.1109/tia.2006.870040

Cited by 18 publications

(10 citation statements)

References 9 publications

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“…Regarding commutation strategies of IMC, two main rules should be taken into account: (i) in order to prevent short circuit in the converter input, the incoming and outgoing switches should not be switched on together at any point in time; and (2) in order to prevent sudden overvoltage occurrences and switches' damage, these switches should not be turned off simultaneously . To ensure the establishment of two conditions at any time, snubber circuits are used in the rectifier bridge of IMC, but because the DC link part in IMC has no smoothing circuit such as electrolytic capacitors in conventional VSI, the load current must be diverted to the snubber circuits during the period switching dead time in the rectifier bridge.…”

Section: Indirect Matrix Converter Theorymentioning

confidence: 99%

“…On the other hand, the currents' discharge of the snubber capacitor flows through the filter capacitors; therefore, additional losses will be generated in the converter. Furthermore, these currents disturb the input current waveform .…”

Section: Indirect Matrix Converter Theorymentioning

confidence: 99%

“…The first method is named rectifier zero‐current commutation, and the second method is named four‐step commutation. Although the losses in snubber circuits can be reduced by these methods, a complicated control circuit must be added to synchronize the switching of both the rectifier and the inverter .…”

Section: Indirect Matrix Converter Theorymentioning

confidence: 99%

“…To execute this strategy exactly, it is necessary to obtain information about the DC link current ( i dc ) direction. In other words, direction of output current and value of input voltage determine the switches' sequence that uses the four‐step commutation strategy and commutation reliability depending on accuracy in current output direction and two input‐phase voltage differences .…”

Section: Four‐step Commutation Strategy Principlesmentioning

confidence: 99%

“…But snubber circuits cause additional losses and input current waveform disturbance. Rectifier zero‐current commutation and rectifier four‐step commutation are two current commutation methods that do not require snubber circuits for a pulse width‐modulated rectifier , and in this paper, the rectifier four‐step commutation is implemented in a rectifier bridge to eliminate snubber circuits drawbacks.…”

Section: Introductionmentioning

confidence: 99%

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High‐performance doubly fed induction machine drive system using predictive direct torque control drive system fed by indirect matrix converters

Behnia

Faraji

Aghasi

et al. 2013

Int J Numerical Modelling

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SUMMARY This paper presents a novel predictive direct torque control for doubly fed induction machine based on indirect matrix converter (IMC), which is characterized by its simple structure, minimal‐torque ripple, and constant switching frequency. Nowadays, the control strategies based on predictive methods have proved their efficiency to improve drive systems capabilities. So, in this paper, one of the best predictive methods that have recently been suggested for doubly fed induction machine drive systems is applied to IMC. The purpose of this combination is to modify the control parameters and size/volume reduction of drive system structure, which is difficult to achieve in conventional systems based on voltage source inverters. The good tracking behavior with reduced torque and flux ripple for both motoring and generating modes as well as removing bulky electrolytic capacitor from the DC link of a converter resulted by using three vectors, two active vectors together with one zero vector per switching period, and applying these vectors to the inverter stage of IMC. To improve the motor drive system performance and reduce losses caused by snubber circuits, the rectifier four‐step commutation method in rectifier bridge is used. In the inverter stage, the predictive direct torque control method is employed. The simulation results of the proposed model confirm its effectiveness and accuracy. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Indirect Matrix Converter Theorymentioning

confidence: 99%

Section: Indirect Matrix Converter Theorymentioning

confidence: 99%

Section: Indirect Matrix Converter Theorymentioning

confidence: 99%

Section: Four‐step Commutation Strategy Principlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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