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Converters for drives

Converters for drives

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Modeling, Simulation and Control of Electrical Drives — Recommend this title to your library

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This chapter presents the most popular dc -ac inverter topologies, two -level and three -level NPC inverter, used for the electric drives. It focuses on the SPWM and SVPWM methods for the two -level and three -level NPC inverters. The emphasis is given to the implementation aspect of these PWM methods. It is shown that the SVPWM method can be implemented in the same way as the SPWM method with small modification in the sinusoidal reference signals. Furthermore, the problem of neutral -point voltage unbalance associated with the three -level NPC inverter is discussed. A popular method to balance the neutral -point voltage is also discussed.

Chapter Contents:

  • 3.1 Introduction
  • 3.2 Three-phase two-level inverter
  • 3.2.1 Sinusoidal PWM
  • 3.2.2 Space Vector PWM
  • 3.2.3 Carrier-based implementation of SVPWM
  • 3.3 Three-phase multilevel inverter
  • 3.3.1 Sinusoidal PWM
  • 3.3.2 Space vector PWM
  • 3.3.3 Carrier-based implementation of the three-level SVPWM [14]
  • 3.3.4 Neutral-point voltage control
  • 3.4 Summary
  • List of symbols
  • Glossary of terms
  • References

Inspec keywords: electric drives; DC-AC power convertors; PWM invertors; PWM power convertors

Other keywords: electric drives; DC-AC inverter topologies; SPWM methods; sinusoidal reference signals; SVPWM methods; three-level NPC inverter; two-level NPC inverter; neutral-point voltage unbalancing

Subjects: Drives

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