# A motor design to defy Lenz' law?

• Narayanan KR
In summary, this scheme would not work because the generator rotor would not move freely in the field.

#### Narayanan KR

1. The two rotors (purple, green) are electricaly isolated but mechanically fit to rotate along same axis
2. The motor action on the left side rotor will move the armature set, this will produce currents in right side rotor that will pass via a variable load.
3. do you see the magnetic fields of both rotors cancelling each other especially when the no. of turns are large
4. will this cancel lenz effect on generator side or both sides?

You have a motor-generator pair and it does not even transform the voltage. Any time you cut magnetic flux with a conductor connected to a load such as the right side of your drawing you will have an opposing force on said conductor. In other words, it gets harder to push the conductor through. A heads up: Discussion of things of this nature are prohibited on PF. Thought I would explain why your scheme won't work though.

it is difficult to move rotor of generator because the magnetic field of induced current is opposing the rotation (lenz law) , but if that magnetic field is canceled by another adjecent rotor, then the question is will the generator rotor move freely in the field (the diagram shows only half a turn in each rotor, so please imagine more turns) .

Narayanan KR said:
it is difficult to move rotor of generator because the magnetic field of induced current is opposing the rotation (lenz law) , but if that magnetic field is canceled by another adjecent rotor, then the question is will the generator rotor move freely in the field (the diagram shows only half a turn in each rotor, so please imagine more turns) .
Your thread will remain closed. We do not allow challenges to mainstream science here. We do allow sincere questions about basic E&M, with the intent being understanding E&M better. Please PM me if you want to continue this discussion. It is too big of a potential waste of time to leave as a general discussion item. Thank you.

## 1. How does a motor design defy Lenz' law?

A motor design that defies Lenz' law is able to produce motion without creating a counter electromotive force (EMF) in the opposite direction of the applied voltage. This is achieved by using specialized materials and circuitry to minimize the effects of Lenz' law.

## 2. What is Lenz' law and why is it important in motor design?

Lenz' law states that when an EMF is induced in a conductor, it creates a magnetic field that opposes the change in the magnetic field that caused the induction. In motor design, this means that when a current is applied to a coil, it will create a magnetic field that resists the motion of the motor. This can limit the efficiency and performance of the motor.

## 3. What are some examples of motor designs that defy Lenz' law?

Some examples of motor designs that defy Lenz' law include axial flux motors, switched reluctance motors, and permanent magnet synchronous motors. These designs use different methods such as minimizing magnetic flux leakage or using permanent magnets to reduce the effects of Lenz' law.

## 4. What are the benefits of using a motor design that defies Lenz' law?

Using a motor design that defies Lenz' law can result in increased efficiency and performance of the motor. This is because it reduces the energy losses caused by the counter EMF and allows for smoother and more precise control of the motor's speed and torque.

## 5. Are there any disadvantages or limitations to a motor design that defies Lenz' law?

One potential disadvantage of using a motor design that defies Lenz' law is that it may require more complex and expensive materials and circuitry. Additionally, these designs may not be suitable for all applications and may have specific operating conditions or limitations.