Skip to main content

Rolls-Royce | Permanent Magnet Technology



Rolls-Royce | Permanent Magnet Technology


The AZ-PM thruster is the latest in a range of Rolls-Royce propulsion products using its permanent magnet technology. This technology is based on electric drive where the motor is in the form of a ring round the propeller. The moving part of the ring is a rim around the propeller blades which carries a series of strong permanent magnets. The rotor, fitted within a series of magnets, turns within an outer ring which form the stator.
When current is supplied to the motor from the variable frequency power supply the electromagnets are excited in a particular sequence and the resulting magnetic fields interact with the field from the rotor magnets creating a torque that turns the rotor and its propeller blades.
Rolls-Royce PM technology is flexible, and is currently applied in this integrated propeller drive form to tunnel thrusters (TT-PM) and azimuth thrusters (AZ-PM). Other versions in which the PM rotor is arranged to turn an output shaft provide a high torque, low speed, drive for winches.
At the centre of the thruster the propeller blades are joined to a hub, which has two functions; to carry the bearings taking propeller thrust and provide radial location of the rotor, and to improve the hydro-dynamic efficiency of the thruster. Loads are transferred to the stator through struts. Both rotor and stator are sealed against water ingress and operate fully submerged.
Among the advantages of this PM thruster technology are high efficiency (at nominal speed) over the entire speed range, leading to low thermal losses and eliminating the need for separate cooling systems of the submerged motor. Thrusters are compact and robust, and require less space within the hull. They are simple, with far fewer components than geared thrusters and are also quieter, with reduced structure and airborne noise. Learn more about Permanent Magnet Thrusters.

Comments

Popular posts from this blog

Free Energy Generator 2017, No Load Generator, Magnet Motor

Perpetual motion, Magnetic motor, Magnet Motor Free Energy,Magnet Motor Energy,Magnet Energy,Energy,Free Energy,Free Energy Fan Engine,Free Energy Magnet Motor,Free Energy Generator,Free Energy Magnet Engine,Freie Energie,Magnetic Motor,Free Energy Light Bulb,Free energy magnets,Light free energy,led bulb,energia libre, Free Energy Device,How to build free energy, overunity, free energy resonator,magnetic resonator, volná energie

Magnetic Free Energy Generator Using Copper Coil

I am show about free energy generator using copper coil and neodymium magnets. The neodymium magnet create a magnetic field and rotated on permanent magnet. The energy generated copper coil.

How to make a powerful DC motor using CDs flat and screws, Amazing science school project

How to make a powerful DC motor using CDs flat and screws, Amazing science school project. Perpetual motion is motion of bodies that continues indefinitely. A perpetual motion machine is a hypothetical machine that can do work indefinitely without an energy source. This kind of machine is impossible, as it would violate the first or second law of thermodynamics. These laws of thermodynamics apply even at very grand scales. For example, the motions and rotations of celestial bodies such as planets may appear perpetual, but are actually subject to many processes that slowly dissipate their kinetic energy, such as solar wind, interstellar medium resistance, gravitational radiation and thermal radiation, so they will not keep moving forever. Thus, machines that extract energy from finite sources will not operate indefinitely, because they are driven by the energy stored in the source, which will eventually be exhausted. A common example is devices powered by ocean currents, w