DLE-TEST21 : Solid State Delayed Lenz Effect in laminated steel core proved with the VRM measurement
created on february 9, 2013 - JLN Labs - last update april 2, 2013
All informations and diagrams are published freely (freeware) and are intended for a private use and a non commercial use.
Toutes les informations et schémas sont publiés gratuitement ( freeware ) et sont destinés à un usage personnel et non commercial
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Avril 2, 2013 - DLE-TEST21 : This is the continuation of the exploration of the Delayed Lenz Effect. In this case, I have replaced the magnetic motor setup (the magnetic rotor, the excitation coil, the controller) used in the test DLE-TEST20 by a simple excitation coil (aire core) powered with a sinewave function generator tuned at the frequency (208Hz) equivalent to the turn speed of the magnetic motor. To check that the suppression of the eddy current and the hysteresis losses doesn't cancel the Delayed Lenz Effect observed, I have used here as the core, a laminated soft steel core from a transformer.

The purpose of this experiment is to measure the temporal phase shift between the magnetic field produced by the excitation coil and the magnetic field of the core (at a distance x mm). The value of the magnetic field is done by measuring the current of the excitation coil via an 1 Ohm non inductive resistor connected in serie with the coil.

Below the setup of the test DLE-TEST21

To measure the intensity of the magnetic fluctuation along the soft iron rod, I have used a Gaussmeter with its Hall probe UGN3503U (here the full data sheet of the sensor).

A digital oscilloscope is used to measure the phase shift between the magnetic field of excitation coil and the magnetic field of this fluctuation at a distance of x mm from the surface of the coil.


We observe that it is fully possible to get a 180° phase shift between the magnetic field in the ferromagnetic core and the magnetic field of excitation coil at a distance of about 22 mm from the coil surface.

At a distance of 5 mm of the coil surface, the measured magnetic field is in phase with the magnetic field of the excitation coil. The measured intensity is equivalent to the intensity of the field measured at 22 mm (there is only a very weak losses).

Comments :

This experiment of the delayed VRM measurement fully confirms that the Lenz effect can also be reversed (180° phase shift) with a solid state generator (without any magnetic rotor). In addition, the use of a soft iron laminated core reduces significantly the hysteresis losses and the eddy currents, which explains why the intensity of the magnetic field measured is not greatly affected with distance. The use of low losses core for transformer (i.e. with nanocristalline material) will allow to increase dramatically the efficiency of the device...

Here the video of the VRM test which shows a 180° phasing shift in the laminated steel core

Stay tuned,

Email: jnaudin509@aol.com

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