A five-level inverter topology with common-mode voltage elimination for induction motor drives

Tekwani, P. N.; Kanchan, R.S.; Gopakumar, K.; Vezzini, Andrea

doi:10.1109/epe.2005.219191

Cited by 17 publications

(15 citation statements)

References 17 publications

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“…1 will produce 125 switching states distributed over 61 voltage space vectors (Table 3). Since the individual inverters (inverter system-A or inverter system-A') are producing the same number (125) of switching states (Table 3 -only 30 0 angular sector is shown), the combination of the switching states from the two combined inverter systems will produce a nine-level voltage space vector structure [16]. From the nine-level voltage space vector structure it can be seen that at certain locations the combined switching state combinations from the inverter systems A and A' will not produce zero CMV.…”

Section: Five-level Inverter For Induction Motor Drives With Reduced mentioning

confidence: 99%

“…Overall the power circuit works as a dual five-level inverter, feeding the open-end winding induction motor from both ends. The power circuit of the work presented in [16] requires a total of 48 switches, whereas the circuit of the five-level inverter, dealt with in this paper (Fig. 1), has a total of 36 switches.…”

Section: Five-level Inverter For Induction Motor Drives With Reduced mentioning

confidence: 99%

“…In this scheme, in order to eliminate the CMV, only switching states with zero CMV are used for PWM control. It is observed that there are more switching states available in the voltage space vector locations than are required to eliminate the CMV and balance the DC-link capacitor voltage [16]. From an exhaustive study of the switching state redundancies available from the power circuit presented in [16], it has been observed that the power circuit can be further simplified.…”

Section: Introductionmentioning

confidence: 96%

“…A five-level inverter structure with common-mode voltage elimination has been analysed in [16] in conjunction with an induction motor drive. The five-level structure is realised by connecting two conventional two-level inverters and one conventional three-level inverter in series.…”

Section: Introductionmentioning

confidence: 99%

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A five-level inverter scheme with common-mode voltage elimination by cascading conventional two-level and three-level NPC inverters for an induction motor drive

Mondal¹,

Gopakumar²,

Tekwani³

et al. 2007

2007 European Conference on Power Electronics and Applications

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Common-mode voltage generated by the PWM inverter causes shaft voltage, bearing current and ground leakage current in induction motor drive system, resulting in an early motor failure. This paper presents a common-mode elimination scheme for a five-level inverter with reduced power circuit complexity. The proposed scheme is realised by cascading conventional two-level and conventional NPC three-level inverters in conjunction with an open-end winding three-phase induction motor drive and the common-mode voltage (CMV) elimination is achieved by using only switching states that result in zero CMV, for the entire modulation range.

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Section: Five-level Inverter For Induction Motor Drives With Reduced mentioning

confidence: 99%

Section: Five-level Inverter For Induction Motor Drives With Reduced mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A five-level inverter scheme with common-mode voltage elimination by cascading conventional two-level and three-level NPC inverters for an induction motor drive

Mondal¹,

Gopakumar²,

Tekwani³

et al. 2007

2007 European Conference on Power Electronics and Applications

Self Cite

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“…However, the cost and maintenance issues prevent most of these methods from being widely practical as most of them use bulky passive filters [4][5][6][7][8][9] or costly and complicated active filters [10]. Some authors proposed CMV remediation [2,[11][12][13][14][15][16] for Multi-Level Inverters (MLI), but in this way, the THD will be worsened and the main purpose of MLI which is THD alleviation is neglected. Additionally PWM strategies for CMV reduction called Reduced CMV PWM (RCMV-PWM) have been proposed [17][18][19][20][21]; the pivotal common consideration in all of them is that, they are based on voltage control, and since some of voltage vectors are eliminated in order to achieve desired CMV, these methods sacrifice the quality of output voltage and current waveforms of PWM inverters [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

A new model predictive current controller with common mode voltage alleviation in three-phase inverters

Safari

Khoshooei

Moghani

2014

2014 4th International Conference on Computer and Knowledge Engineering (ICCKE)

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Pulse width modulation controlled inverters produce Common-Mode Voltage (CMV), which is the main culprit of many system drawbacks ranging from Electromagnetic Interference (EMI) issues to bearing damage and insulation aging. Former methods for commonmode voltage reduction based on voltage control cause a great deal of extra harmonic distortion in output currents. In this paper, a method named as Near State based Model Predictive Control (NS-MPC) is proposed which by using Model Predictive Control (MPC) algorithm operating in a low sampling frequency and applying the real non-zero state vectors of the converter used together with new virtual state vectors produced by Near State PWM (NSPWM) generates the switching pattern in each sampling cycle. Theory and simulations show that this proposed method exhibits superior common mode voltage reduction along with a generally satisfactory performance. Keywords-Model Predictive Control (MPC); inverter; adjustable speed drives; Common Mode Voltage (CMV); Reduced CMV PWM; Near State PWM (NSPWM)

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Five-level inverter scheme for an induction motor drive with simultaneous elimination of common-mode voltage and DC-link capacitor voltage imbalance

Tekwani

Kanchan

Gopakumar

2005

IEE Proc., Electr. Power Appl.

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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 fivelevel 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.

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A five-level inverter topology with common-mode voltage elimination for induction motor drives

Cited by 17 publications

References 17 publications

A five-level inverter scheme with common-mode voltage elimination by cascading conventional two-level and three-level NPC inverters for an induction motor drive

A five-level inverter scheme with common-mode voltage elimination by cascading conventional two-level and three-level NPC inverters for an induction motor drive

A new model predictive current controller with common mode voltage alleviation in three-phase inverters

Five-level inverter scheme for an induction motor drive with simultaneous elimination of common-mode voltage and DC-link capacitor voltage imbalance

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