1 MVA, 6,000 V Cascaded Multilevel Inverter/Adjustable Speed Drive

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1 MVA, 6,000 V Cascaded Multilevel
Inverter/Adjustable Speed Drive
Objective To develop an efficient and low cost
adjustable speed drive while minimizing switching
frequency and input current harmonic distortion
using the PEBB concept.
83 kVA Multilevel Inverter Building Block

• Features
• Uses 12 identical multilevel inverter building
  blocks in cascade to create a 3-phase, 17 level
  topology
• Able to use 1200V IGBTs, while total output
  voltage is 6,000 V ac
• Utilizes a unique configuration to minimize
  harmonic line current
• The 17-level topology allows for low harmonic
  content at the output at very low switching
  frequencies
• Low dv/dt reduces motor insulation stress

1 MVA, 6000 V System Operation