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Old 04-27-2007, 12:03 AM
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Aaron Aaron is offline
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Bedini Advanced

Bedini Advanced Discussion goes here. Reluctance motors and more.
Aaron Murakami

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Old 04-27-2007, 05:24 AM
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John_Bedini John_Bedini is offline
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reluctance motors from work

To All,
In this video I wanted to hookup one of the reluctance motors from work.(one pole only) I also want to point out that the circuit is using a hall device, but just like Peters circuit, just like he has posted on his home pages. The timing wheel is the most important part of the device. The iron rods are ground on the ends as to deflect the magnetic fields, same as the coil pole piece, (angles). The motor only runs because it is attracted to the electromagnet and then at the half way point the battery is disconnected and the ground angles take over with the bias magnet. The bias magnet is to apply a little magnetic field to the rods, the reason is to cause a differential in the magnetic field so recovery takes place easy and the rotor moves out of the field easy. I will post the diagram if the group finds this of benefit.
But the design Peter has posted for recovery does work and the motor does run.
You may view the motor at:

I admit that I had to do it in three sections as my camera is not that good. I feel that something is missing from the recovery in this type of motor, as I think the iron sucks up all the Radiant energy, you may see something different. The input power is 200Ma and it has about the same torque as the monopole 23%.
If you look at the wave on the scope you can see it almost gives back the input, Ben where are you now we need your input on the wave form. I just thought that the group would like to see this.
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Old 04-27-2007, 09:37 PM
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John_Bedini John_Bedini is offline
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Ben's Answer

Hi John,

Aha the beauty of a video, it is worth a million words...Most
excellent. I commend you on your excellent demonstration model!
Hubba Hubba.

Several things are visible.

I assume you are using a PNP/diode drive/recovery circuit similar to
what is shown in your electronic package on Peters motor but driven
by a Hall effect device. Excellent.

I also assume the bias magnet is a round ceramic with one face N or
South, don't know the bias but it obviously is there to help the rods
switch back after the induced field from the coil reverses and tries
to muck things up. This also ties in with the field reversing in the
drive core and possibly an attempt to get at least a weak push off
this reversal without appreciable generator action.

A whole lot going on, spacing of bias magnet, spacing/shape of field
coil core. Switching speed in rods is also a problem. Industrial
switched reluctance motors must beat the heck out of the SS
components to reset the fields in the rotor! Due to the length of the
recovery pulse and the diameter of the rotor and drive stator core in
your motor and with the flipping fields, it tries to slow motor down.
You're shaping the face of the drive pole and the fixed bias magnet
modifies/overcomes this to a point.

VERY nice square wave to coil No evidence of generator action, Nice
HV (Good transistor there!) EMF pulse when you disconnect battery. I
suspect you would get the same basic waveform if you drove it with a
signal generator at same duty cycle and frequency rate without the

There are several things that could be addressed here.

Obviously the generator action from the turning wheel which also
gives back more energy to the charging battery while the drive
circuit is off in a monopole or bi-polar motor is missing here as
there are basically no magnets. A secondary lightly loaded generator
attached to wheel to provide/use some of the energy generated in the
wheel should be helpful, which I'm sure you have considered.

It is possible that if you increased the input (separate power
supplies for Hall and coil) voltage using a capacative discharge
circuit. You might find that the recovery pulse would widen out and
possibly become larger than the drive pulse at least up to saturation
of coil. A funny beast these reluctance motors. As a thought, I
wonder if you could use a coil on the ROTORS that via a commutator
could use the back EMF to FLIP the rotor to provide push to the rotor
after TDC. Funky idea. It would be switch reluctance and a
monopole! In pieces here, nothing OU but as a system, I don't know.
Recovered back EMF pulse to battery and possibly in series with
suggested rotor coils and also recovered energy from generator
attached to wheel? Who knows? I'm just letting my mind wander and

Third, totally enclose drive coil in magnetic containment case like
DC solenoid construction, this would possibly shape/intensify the
field and increase motor output of wheel.

I wonder if a commercial switched reluctance motor with your recovery
circuit with battery and a generator attached what it would

Again, John, that is a heck of a nice motor!


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Old 05-09-2007, 10:34 PM
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John Bedini | Radiant Energy

John Bedini | Radiant Energy
Aaron Murakami

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Old 02-07-2013, 02:13 AM
John_K John_K is offline
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Updated links

Here's the updated links to the videos above:


John K.
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