This article deals about the differences between electric engines and the most appropriate forms for particular tasks.

Basic design of electric engines

Types

Electric motors can be divided into 3 main types: alternating current (AC) motors, direct current (DC) motors, and universal motors. An AC electric motor will not run when supplied with DC current, and a DC motor will not run on AC current; a AC/DC motor will however run on either AC or DC current.

Subtypes:

  • AC electric motors: Induction motor (squirrel cage rotor), Induction motor (slip ring rotor), Induction motor (solid core rotor), Shaded pole motor, ...
  • DC electric motors: Pancake DC motor, Brushed DC electric motor, Brushless DC electric motor, Stepper DC motor, ...
  • AC/DC motors: Universal motor

AC & DC motors

File:Main types electric engines.JPG
Main types of DC electric engines

One of the main differentiation we can make between the engines is on whether they use AC or DC power. Surprisingly however, in practice, this doesn't really matter that much since the engines are so different on regards to weight, efficiency, durability, ... There for example isn't a "AC" version of the Brushed or Brushless DC engine, ... Instead, each engine is different, and is most suitable to a specific type of application.

1, 2 or 3-phases

File:1 2 3 phase E engine.JPG
1, 2 and 3-phase electric engine

Another differentiation can be made on regards to 1, 2 and 3-phase engines.

Note; from the article at Howstuffworks about brushless engines, it appears that the rotation speed of the engine (and hence the power output) can be regulated to some extent. It is thus possible that with these engines, no gearbox is necessairily needed in some situations.


Requirement of clutch + gearbox ?

==Applications==~

  • DC brushed motor (or DC pancake motor): useful for domestic applications (ie powering washing machines, dishwashers)
  • AC



3D models

References

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