Why a permanent magnet shaft generator?

A permanent magnet (PM) shaft generator offers vessels unprecedented benefits, including high power density, better reliability and lower operational costs.

permanent magnet shaft generators

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Design flexibility

Thanks to the improved high density, a PM shaft generator can be more compact, lighter in weight and smaller in size. This leads to greater flexibility with the limited space available in ship configurations.

Higher efficiency

A PM shaft generator gives high-efficiency performance over the entire operating range, significantly cutting back on fuel consumption. A PM machine is typically 2–4% more efficient at full load and 10% more efficient at part loads compared with induction machines. These efficiencies result from a lack of current losses in the rotor, the absence of an exciter and reduced winding losses.

High power density

The synchronous PM shaft generator contains Neodymium-Iron-Boron (NdFeB) magnets, materials with a very high flux density, which makes them ideal for variable speed generators throughout the entire speed range. The magnetic field is created with almost zero losses.

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Operational reliability

PM shaft generators have proven their high reliability and durability under extremely harsh operating conditions in many industrial applications. They deliver excellent performance with corrosion resistance and temperature tolerance. With advanced thermal management, operational temperatures can be kept low, which in turn, assures an extended lifetime of the machine.

Widest range available

The Switch product portfolio of brushless PM synchronous machines is the widest in the market. We offer drive trains from 1 MW to 10 MW at low, medium and high speed. The machines can be used either as a generator or as a motor. Our PM technology complies with the standards of leading classification societies in the world. They have been tested, approved and certified to ensure the highest possible reliability of the vessels and to comply with the strict international safety and environmental standards.