Motoring Effect in DC Motors: Magnetic Field Interaction or Lorentz Force?

Thread starter cnh1995
Start date Jun 17, 2015
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Dc Field Force Interaction Lorentz Lorentz force Magnetic Magnetic field Motors

In summary: When current flows though the armature winding of a dc motor, what exactly happens in there that produces the torque?In summary, when current flows through the armature winding, a magnetic field is created. This magnetic field has an energy density = ½*B*H [ J/m3 ]. This field is in circles around the wire. The torque is proportional to the product of these two currents.

Jun 24, 2015

jim hardy

Science Advisor

Gold Member

Dearly Missed

cnh1995 said:

I think its time for me to start working on higher math..

There are plenty of extraordinarily capable people here at PF ...

I'll not pretend I'm qualified to teach vector calculus.

Still learning something every day --

old jim

<h2> What is the motoring effect in DC motors?</h2><p>The motoring effect in DC motors refers to the phenomenon where an electric current flowing through a conductor in a magnetic field experiences a force, known as the Lorentz force. This force causes the conductor to rotate, creating motion in the motor.</p><h2> How does the magnetic field interact with the conductor in a DC motor?</h2><p>The magnetic field in a DC motor interacts with the conductor through the Lorentz force. When an electric current flows through the conductor, it creates a magnetic field around it. This magnetic field interacts with the external magnetic field, causing the conductor to experience a force and rotate.</p><h2> What is the role of the Lorentz force in the motoring effect?</h2><p>The Lorentz force is the force that causes the conductor in a DC motor to rotate. This force is a result of the interaction between the magnetic field created by the electric current in the conductor and the external magnetic field.</p><h2> How does the motoring effect impact the performance of a DC motor?</h2><p>The motoring effect is essential for the operation of a DC motor. Without this effect, the motor would not be able to convert electrical energy into mechanical energy. The strength of the motoring effect is directly proportional to the strength of the magnetic field and the current flowing through the conductor.</p><h2> Can the motoring effect be reversed in DC motors?</h2><p>Yes, the motoring effect can be reversed in DC motors. This is known as the generating effect, where mechanical energy is converted into electrical energy. This can be achieved by rotating the motor's shaft, which creates an electric current in the conductor, producing a magnetic field that interacts with the external magnetic field and generates electricity.</p>

FAQ: Motoring Effect in DC Motors: Magnetic Field Interaction or Lorentz Force?

What is the motoring effect in DC motors?

The motoring effect in DC motors refers to the phenomenon where an electric current flowing through a conductor in a magnetic field experiences a force, known as the Lorentz force. This force causes the conductor to rotate, creating motion in the motor.

How does the magnetic field interact with the conductor in a DC motor?

The magnetic field in a DC motor interacts with the conductor through the Lorentz force. When an electric current flows through the conductor, it creates a magnetic field around it. This magnetic field interacts with the external magnetic field, causing the conductor to experience a force and rotate.

What is the role of the Lorentz force in the motoring effect?

The Lorentz force is the force that causes the conductor in a DC motor to rotate. This force is a result of the interaction between the magnetic field created by the electric current in the conductor and the external magnetic field.

How does the motoring effect impact the performance of a DC motor?

The motoring effect is essential for the operation of a DC motor. Without this effect, the motor would not be able to convert electrical energy into mechanical energy. The strength of the motoring effect is directly proportional to the strength of the magnetic field and the current flowing through the conductor.

Can the motoring effect be reversed in DC motors?

Yes, the motoring effect can be reversed in DC motors. This is known as the generating effect, where mechanical energy is converted into electrical energy. This can be achieved by rotating the motor's shaft, which creates an electric current in the conductor, producing a magnetic field that interacts with the external magnetic field and generates electricity.