Make an Electromagnetic Motor: Overcome Short-Circuiting

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    Electromagnetic Motor
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Discussion Overview

The discussion revolves around the construction and functioning of an electromagnetic motor, specifically addressing concerns about short-circuiting due to the metal core used in the design. Participants explore the role of the core and its interaction with the coil of wire.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions whether the metal core would conduct electricity and cause short-circuiting in the electromagnetic motor.
  • Another participant clarifies that the core is laminated and insulated from the coil, preventing direct contact and short-circuiting.
  • A third participant notes that the wire used in the motor is insulated, which also contributes to preventing short-circuiting.
  • There is a query about the purpose of the metal core in the motor's design.
  • A response explains that the metal core helps form a magnetic circuit that directs magnetic flux efficiently, although it is not strictly necessary for the motor's operation.

Areas of Agreement / Disagreement

Participants express differing views on the necessity and function of the metal core, with some agreeing on its efficiency benefits while others question its role in preventing short-circuiting. The discussion remains unresolved regarding the core's necessity.

Contextual Notes

Some assumptions about the insulation and construction of the motor components are not fully detailed, and the efficiency implications of using a core versus not using one are not quantitatively addressed.

v_pino
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In order to make a electromagnetic motor, we wrap a coil of wire around a core. But wouldn't the metal core conduct as well, so we end up short-circuiting the system?
 
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v_pino said:
In order to make a electromagnetic motor, we wrap a coil of wire around a core. But wouldn't the metal core conduct as well, so we end up short-circuiting the system?

They don't actually touch, the core is laminated (i.e. insultated from the inducing conductor). For example, if you look at a transformer drawing, you'll normally see the coils drawn with a slight separation or gap from the core.

Since motors work off of transformer action, you have the same effect in a motor.

http://en.wikipedia.org/wiki/Image:Flux_leakage.svg

Hope that helps.

CS
 
The wire is insulated.
 
Thanks for the reply.

So what is the purpose of the metal core?
 
v_pino said:
Thanks for the reply.

So what is the purpose of the metal core?

The metal core forms a magnetic circuit directing the magnetic flux to where it is most useful. A core is not required but make things much more efficient.
 

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