High density Modular Multilevel Cascade Converter for medium-voltage motor drive

Jiang, Dong; Xue, Jianru; Wang, Fred; Kao, Min H.

doi:10.1109/ests.2011.5770920

Cited by 6 publications

(1 citation statement)

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“…corresponding operating frequency of the drive. Then, using (1),(2), and(4), it is observed that the converter output voltage becomes sinusoidal. However, 2 dc V can be considered high beyond certain voltage level.…”

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Control Strategy to Naturally Balance Hybrid Converter for Variable-Speed Medium-Voltage Drive Applications

S¹,

Poddar

Paramasivam

2015

IEEE Trans. Ind. Electron.

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In this paper, novel control strategy to naturally balance hybrid converter is presented for medium voltage induction motor drive application. Fundamental current of the motor is produced by three-level quasi-square wave converter. Several single phase full bridge converters are connected in series with this quasi-square wave converter to eliminate harmonic voltages from the net output voltage of this hybrid converter. Various novel modulation strategies for these series cells are proposed. These lead to naturally regulated dc bus voltage of series cells. These also optimize the number of series cells required. Variable fundamental voltage and frequency control of induction motor is adopted with constant dc bus voltage of three-level quasi-square wave converter. Experimental results are also produced here to validate the proposed modulation strategies for induction motor drive using low voltage proto model. Based on above, a 2.2kV induction motor drive has been built and results are also produced in this paper.Several low-voltage 2-level/3-level inverter modules are also connected in series [2] -[3] for these applications. However, 0278-0046 (c)

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confidence: 99%