This case study introduces the ABB Azipod® propulsion system and ACS 6000 variable speed drive system used by the U.S. Coast Guard multi-mission Great Lakes Icebreaker (GLIB). The Azipod® propulsion system and ACS 6000 variable speed drive system provide the icebreaker with flexibility and manoeuvrability in ice conditions.
The ACS 6000 medium‑voltage drive is used to power ABB’s Azipod® propulsion system on the U.S. Coast Guard Great Lakes icebreaker, providing full torque over the entire speed range and improving manoeuvrability in heavy ice conditions. The modular concept offers a compact footprint, lightweight design, and flexibility for ship designers.
The drive incorporates PEBB (Power Electronic Building Block) technology with a three‑level Voltage Source Inverter, water cooling, and high efficiency (>98.5%). It supports various motor types and can be configured as a single or multi‑drive system, delivering high reliability, power density, and reduced noise and vibration.
| Inverter type | Three-level Voltage Source Inverter (VSI) |
|---|---|
| Converter cooling | Water cooling |
| Output voltage | 8.0 - 3.3 KV (optional: 2.3 kV) |
| Converter efficiency | Typically > 98.5% (incl. all auxiliaries) |
| Motor compatibility | Induction, synchronous and/or permanent magnet motor |
| Special feature | Available as single or multidrive |
It powers ABB’s Azipod® electric podded propulsion system on the U.S. Coast Guard Great Lakes icebreaker.
The drive incorporates PEBB (Power Electronic Building Block) technology.
The converter typically achieves greater than 98.5% efficiency, including all auxiliaries.