Permanent magnet generators
The permanent magnet generators are synchronous machines with rotor windings replaced by permanent magnets. This provides the benefits of premium efficiency alternative for full converter concept.
High efficiency, grid support and modular flexibility
Permanent magnet generators are synchronous machines that use high-performance magnets instead of rotor windings, eliminating the need for separate excitation. This removes rotor excitation losses - typically 30% of conventional generator losses - resulting in exceptional efficiency, high power density and a compact footprint.
Operating efficiently across all speeds, they deliver maximum annual energy production at the lowest lifetime cost. Backed by ABB's proven expertise in permanent magnet technology, these generators ensure reliable performance you can trust.
Key benefits
High performance
The full converter concept totally separates the generator from grid disturbances. It offers the best performance, advanced grid compliance and full control during grid transients.Grid compliance
Our grid friendly generators feature low Total Harmonic Distortion (THD), minimizing additional losses, overheating, vibration and electrical noise.Leader in permanent magnet technology
ABB has been developing permanent magnet technology for different motor and generator applications since the 1990s.Low cost of ownership
Globally identical manufacturing with high availability and over 97% efficiency.Easy serviceability and local support
Avoid unplanned outages with uptime, efficiency and cost savings.Technical data for high speed permanent magnet generators
In full converter (FC) concept, using standard high speed drivetrain with permanent magnet generators, enables the smallest size and highest efficiency at all speeds.
Power Up to 7.9 MW
Shaft heights 500, 560, 710
Number of poles 6 - 8
Standard IEC60034, IEC61400
Voltages up to 3.3kV
higher on requestFrequency VFD, 50Hz or 60Hz
Cooling Air to air, Air to water, Open air cooled
Protection up to IP54
Bearings Antifriction
Enclosure material Welded steel
Ambient -30°C up to 50°C
Technical data for medium speed permanent magnet generators
Medium speed permanent magnet generators represent a very compact, slower speed solution offering the highest efficiency with low maintenance needs. ABB has strong background in medium permanent magnet design with proven reliability.
Power Up to 15 MW
Shaft heights 710, 1120, 1400, 1600
Number of poles (8) 14 - 24
Standard IEC60034, IEC61400
Voltages up to 3.3kV
higher on requestFrequency VFD, 50Hz or 60Hz
Cooling Air to water, Open air cooled
Protection IP54
Bearings Antifriction
Enclosure material Welded steel
Ambient -30°C up to 50°C
Technical data for direct drive generators
In a direct drive application the turbine and the generator are integrated to form a compact and structurally integrated unit. The design gives free access to all parts for easy installation and maintenance. The simple and robust low speed rotor design with no separate excitation or cooling system results in minimum wear, reduced maintenance requirements, lower life cycle costs, and a long lifetime.