True DC generator idea. Need help to solve a problem

[Low-Q]

Hi Low-Q
Unless I'm misunderstanding it,there is no change in the flux,which is needed to generate,as flux cannot continually increase,or decrease forever,ac,or at least rippled dc must result.
I reserve the right to be totally wrong.
peter

That is something which has crossed my mind too. On the other hand, there is a reason why Eddie currents occour in a rotating metal disc inside a uniform magnetic field - the Faraday generator. There are no change in the magnetic flux, but electricity are made anyways.

I have a small hope that the coils in my idea are an "equivalent" to the rotating disc, but instead of using brushes on the rotating metal disc to harness the energy, my idea are to do this brushless.

I have been looking for a way to force the magnetic flux to enter/cross a coils windings, but exit the coil without crossing the windings the opposite direction. If this can be realized, this pure DC generator can provide energy with higher voltage and lower current, with less loss due to no brushes and low currents - the opposite of the Faraday generator.

This generator can also be one of those which cannot work as an electric DC motor - as the Faraday generator CAN. However, IF it could be used as a brushless electric DC motor, it would not take long  for a permanent magnet motor to be realized...

So i have two guesses of the outcome:

1- It will not work as both a generator and a motor

2- It will work as a generator, but not as a motor


Vidar

[Lunkster]

I think that just because something was done many years before, it is helpful to have many eyes look at it again.  With new materials that have been  introduced into the market places along with the new technologies and new understanding in the sciences, the old designs may benefit from these things.  I added a file of what I think a true DC generator would look like.  I see applications where the AC generator makes sense at the same time where DC generators make more sense.  If and when we get to commercialized self-contained power generation systems, the motor and generator will be combined into one device. 

The Lunkster

[onepower]

LowQ from October 30, 2010

I have drawn a model of what I could think of as a true DC generator. All generators today are AC either internally with DC output, or both AC internally and output. I want to make a generator that produce pure DC current.

I thought this was strange enough it deserved a response...

In fact all of the first electrical generators were true DC and there was no such thing as AC, it simply did not exist until it was invented later on. Not unlike the fact that all the first vehicles were electric because there was no such thing as a fossil fueled engine or fossil fuels like gasoline or diesel. In this respect it pays to do the research, educate ourselves and follow the time line of where a given technology started and where it is now.

In fact the first generators I built from scratch were true DC generators such as the Bennet doubler, Pfaff multiplier, a Wimshurst and then a 300 kV Van De Graaff. It was only after I learned the basics of what electricity is, how it actually works and how it was generated that I moved on to AC generators. As it were, I also found it easier to simply scratch build my own AC generators based on what I learned from reading Robert Adams work because our present off the shelf AC motor/generators are a joke. They are designed to hard couple to the grid sacrificing efficiency for simplicity not generate power at peak efficiency.

It's important to understand what we normally do and understand as "popular" or "normal" is not the only way of doing things. In fact it is this populism and adherence to a supposed warped sense of normalcy which inhibits our growth as beings in my opinion. We have options... use them.

Regards

[AllanV]

LowQ from October 30, 2010
I thought this was strange enough it deserved a response...

In fact all of the first electrical generators were true DC and there was no such thing as AC, it simply did not exist until it was invented later on. Not unlike the fact that all the first vehicles were electric because there was no such thing as a fossil fueled engine or fossil fuels like gasoline or diesel. In this respect it pays to do the research, educate ourselves and follow the time line of where a given technology started and where it is now.

In fact the first generators I built from scratch were true DC generators such as the Bennet doubler, Pfaff multiplier, a Wimshurst and then a 300 kV Van De Graaff. It was only after I learned the basics of what electricity is, how it actually works and how it was generated that I moved on to AC generators. As it were, I also found it easier to simply scratch build my own AC generators based on what I learned from reading Robert Adams work because our present off the shelf AC motor/generators are a joke. They are designed to hard couple to the grid sacrificing efficiency for simplicity not generate power at peak efficiency.

It's important to understand what we normally do and understand as "popular" or "normal" is not the only way of doing things. In fact it is this populism and adherence to a supposed warped sense of normalcy which inhibits our growth as beings in my opinion. We have options... use them.

Regards

Hi, sometime ago and after some thinking about the magnetic field around a conductor two short pieces of aluminum 2cm diameter were rolled NOT spun between two speaker magnets. A model car differential was used and slip rings for brushes also. It was spun a bit slow probably but a voltage appeared. The aluminum conductors protruded out further than the magnets so they were trued up and then no voltage appeared.
It seemed that the field on the edge of the speaker magnet where it expands out was necessary. It varies in intensity through the rolling conductor and creates voltage.

It is still in the workshop. The next improvement is to have a tapered conductor 8mm one end and about 14mm or slightly more at the other. Because the magnetic field needs further to reach it should expand through out the taper.
Seven sets of laminated transformer steel to make 5-6mm could be spaced around the tapered conductor. the south pole needs to take one step and the north pole would switch between 4 one at a time and then the south would take a step and the north would again take 4 steps. And so on very fast. The magnetic field would always be progressing into new conductor material.

The taper would mean that current would flow into the different intensity. The speed at one end may need to be faster than the other to allow for the different diameters. It could be made solid state, but there was a plan to use strong small magnets.

regards,

Allan         

[AllanV]

ALL Pre 1955 US cars had REAL DC Generators with a Commutator and Brushes.

Ebay has HUNDREDS of them for sale.  Why reinvent the wheel?

Cheers

Hi, you're taking all the fun out of it for one. The magnetic field is very weak around a conductor and it may be possible to get welder voltage and currents cheaply.

Allan