What is the role of the Lorentz force in an electric motor?

  • Thread starter Thread starter fawk3s
  • Start date Start date
  • Tags Tags
    Force Work
AI Thread Summary
The Lorentz force is crucial in electric motors as it governs the interaction between electromagnetic fields and electric currents, causing the rotor to spin. While it may not always be explicitly calculated, it underlies the forces described in Maxwell's Equations, such as Faraday's Law. Understanding this force is essential for grasping how electric motors operate. The discussion highlights the importance of recognizing the Lorentz force in both theoretical and practical applications of electromagnetism. Ultimately, the Lorentz force is the fundamental mechanism driving the functionality of electric motors.
fawk3s
Messages
341
Reaction score
1
As I was reading it in my textbook for a single particle, it made a lot of sense. But when I started thinking about the electric motor, it confused me, because it is Lawrence force which makes the rotor spin, right?
I have a couple of ideas, but I thought I'd ask here.

Thanks in advance,
fawk3s
 
Physics news on Phys.org
Actually, I think I just figured it out, was too hasty to post. So I think there's no need to reply.
 
Well, just for clarification, I believe you are talking about the Lorentz Force. But yes, the Lorentz Force is the only interaction that an electromagnetic field makes on currents and charges in classical electrodynamics. You do not need to use it explicitly (for example we often find the force by taking the gradient of the energy density of the field) and it is often hidden away inside of Maxwell's Equations (for example Faraday's Law) but if the electromagnetic field exerts a force, it is done so via Lorentz in some manner.
 
I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...
Back
Top