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New feedforward space-vector PWM method to obtain balanced AC output voltages in a three-level neutral-point-clamped converter
Abstract
In three-level neutral-point-clamped voltage-source inverters, proper modulation allows the average voltages of the DC-link capacitors to be kept at one-half the level of the DC-link voltage. However, in some operating conditions, a low-frequency ripple appears in the neutral-point potential and its frequency is three times that of the output voltages. As a result, the output voltages also have low-frequency distortion, which includes even and odd multiples of the fundamental. In this paper, a new space-vector pulsewidth-modulation strategy is presented to avoid that low-frequency output voltage distortion. This modulation method tries to balance the voltages of the capacitors by using only three vectors per modulation cycle. The duty ratios are directly calculated from the space-vector diagram, even when balance is not achieved. For all cases, the result is a balanced set of three AC output voltages. Some simulated and experimental results are given to validate the method.
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Citations
Cited by
Schweizer, M., & Kolar, J. W. (2013) · IEEE Transactions on Power Electronics · doi:10.1109/tpel.2012.2203151 · Cited by 1,006
Busquets-Monge, S., Bordonau, J., Boroyevich, D., & Somavilla, S. (2004) · IEEE Power Electronics Letters · doi:10.1109/lpel.2004.828445 · Cited by 522
Self-citationEvaluation of the Low-Frequency Neutral-Point Voltage Oscillations in the Three-Level Inverter
Pou, J., Pindado, R., Boroyevich, D., & Rodriguez, P. (2005) · IEEE Transactions on Industrial Electronics · doi:10.1109/tie.2005.858723 · Cited by 299
Self-citationSpace Vector Based Capacitor Voltage Balancing for a Three-Level NPC Traction Inverter Drive
Choudhury, A., & Pillay, P. (2020) · IEEE Journal of Emerging and Selected Topics in Power Electronics · doi:10.1109/jestpe.2019.2953183 · Cited by 43
Metadata
- Authors
- Pou, J., Boroyevich, D., & Pindado, R.
- Venue
- IEEE Transactions on Industrial Electronics
- Published
- 2002-10
- Volume
- 49
- Issue
- 5
- Pages
- 1026-1034
- ISSN
- 0278-0046 (ISSN-L)
- OpenAlex
- W2168589545
- Cited by
- 171
- References
- 0
- FWCI
- 7.71
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: New feedforward space-vector PWM method to obtain balanced AC output voltages in a three-level neutral-point-clamped converter. https://app.cochat.ai/papers/10.1109/tie.2002.803207
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- Pou, J., Boroyevich, D., & Pindado, R. (2002). New feedforward space-vector PWM method to obtain balanced AC output voltages in a three-level neutral-point-clamped converter. IEEE Transactions on Industrial Electronics. https://doi.org/10.1109/tie.2002.803207
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