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  2. Noise and vibration on maritime vessels - Wikipedia

    en.wikipedia.org/wiki/Noise_and_vibration_on...

    To control the electromagnetic vibrations at the origin, skewing the electric motor or choosing a better slot/pole combination [3] will reduce electromagnetic force harmonics or avoid resonances between magnetic forces and structural modes of the electric motor. In megayachts, the engines and alternators let out unwanted noise and vibrations ...

  3. Direct torque control - Wikipedia

    en.wikipedia.org/wiki/Direct_torque_control

    The direct torque method performs very well even without speed sensors. However, the flux estimation is usually based on the integration of the motor phase voltages. Due to the inevitable errors in the voltage measurement and stator resistance estimate the integrals tend to become erroneous at low speed. Thus it is not possible to control the ...

  4. Torque motor - Wikipedia

    en.wikipedia.org/wiki/Torque_motor

    The latter monitors engine speed by counting electrical pulses from the ignition system or from a magnetic pickup and, depending on the speed, makes small adjustments to the amount of current applied to the motor. If the engine starts to slow down relative to the desired speed, the current will be increased, the motor will develop more torque ...

  5. Engine order telegraph - Wikipedia

    en.wikipedia.org/wiki/Engine_order_telegraph

    An engine order telegraph or E.O.T., also referred to as a Chadburn, [1] is a communications device used on a ship (or submarine) for the pilot on the bridge to order engineers in the engine room to power the vessel at a certain desired speed.

  6. Reluctance motor - Wikipedia

    en.wikipedia.org/wiki/Reluctance_motor

    Rotor losses are minimal compared to those of an induction motor, however it normally has less torque. [2] [3] Once started at synchronous speed, the motor can operate with sinusoidal voltage. Speed control requires a variable-frequency drive. High-powered SynRMs typically require rare-earth elements such as neodymium and dysprosium. However, a ...

  7. Regenerative braking - Wikipedia

    en.wikipedia.org/wiki/Regenerative_braking

    These electricity storage systems for hybrid and engine functions include a lithium-ion battery with scalable capacity or a flywheel, a four to eight kilogram electric motor (with a maximum power level of 60 kW or 80 hp), as well as the KERS controller for power and battery management. Bosch also offers a range of electric hybrid systems for ...

  8. Electric motor - Wikipedia

    en.wikipedia.org/wiki/Electric_motor

    An industrial electric motor . An electric motor is a machine that converts electrical energy into mechanical energy.Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft.

  9. Engine braking - Wikipedia

    en.wikipedia.org/wiki/Engine_braking

    In electric and hybrid vehicles, electric motors provide the drivetrain resistance, recharging the onboard battery using energy recovered from the vehicle's kinetic motion which would otherwise have been wasted. In hybrid vehicles, the engine runs on electric power to dissipate excess energy when the battery has been fully recharged.