Permanent magnet machines for marine applications

Our permanent magnet machines can be operated as a generator or a motor. They are ideal for large low-speed, direct-drive two-stroke engines. Our propulsion motors offer high efficiency with a large speed range. 

All PM machines are thoroughly tested at our own Large Drive Test Center and fulfill relevant international standards and class requirements.

Key to higher efficiency

Permanent magnet (PM) technology is key to higher efficiency in shaft generator and direct propulsion applications.

A strong magnetic field is needed to link the stator and rotor for electromechanical power conversion. Traditionally, this field was supplied by electric current through a separate winding.

With modern Neodymium magnets, the magnetic field can be created more simply and efficiently, resulting in a technically advanced machine. That’s why their use in PM machines have made them the top choice for wind power – and now also for marine.

Save 5,000 tons of CO²
Our average permanent magnet marine shaft generator can save up to 5,000 tons of CO2 over a vessel’s lifetime – or 250 tons annually. This covers the annual CO2 footprint of 37 persons in the EU. So far, over 350 machines have been sold, covering the carbon footprint of about 13,000 people.

Widest range of permanent magnet machines available

PMM2000M
580–1500 kNm, 0–130 rpm
Typically used in 4–12 MW direct-drive systems
PMM1500M
220–630 kNm, 0–220 rpm
Typically used in 2–4 MW direct-drive systems
PMM1200M
200–450 kNm, 0–250 rpm
Typically used in 1–3 MW direct-drive systems
PMM1000M
200–450 kNm, 0–250 rpm
Typically used in 1–3 MW direct-drive systems
PMM850M
70–230 kNm, 0–400 rpm
Typically used in 0.5–2 MW shaft generator and propulsion motor applications

Advantages of permanent magnet machines

Higher efficiencyNo need for magnetization power

Rotor losses close to zero
Better reliability and less maintenanceNo rotor windings, slip rings, exciters or automatic voltage regulators
Reduced space requirementsHigher air gap tangential stress results in more compact machine

Shorter and narrower, especially in low-speed applications
Enhanced shaft line dynamicsMuch smaller rotating mass and inertia

Reduced torsional vibrations, lateral vibrations and rotor deflections
  • PMM2000M 580–1500 kNm, 0–130 rpm Typically used in 4–12 MW direct-drive systems

    PMM2000M 580–1500 kNm, 0–130 rpm Typically used in 4–12 MW direct-drive systems

  • PMM1500M 220–630 kNm, 0–220 rpm Typically used in 2–4 MW direct-drive systems

  • PMM1200M 200–450 kNm, 0–250 rpm Typically used in 1–3 MW direct-drive systems

  • PMM1000M

    PMM1000M 200–450 kNm, 0–250 rpm Typically used in 1–3 MW direct-drive systems

  • PMM850M 70–230 kNm, 0–400 rpm Typically used in 0.5–2 MW shaft generator and propulsion motor applications