Re-Inventing The Wheel-Part1-Clemente_Figuera-THE INFINITE ENERGY MACHINE

[TinselKoala]

I'm pretty sure you can do that with an Arduino. The basic Arduino comes with 2 PWM outputs that can be programmed for frequency and duty cycle, IIRC. These are used by robot builders to control servomotors driving wheels, so the robot can turn or accelerate.This means that the frequency and pulse width of each output can be independently controlled, thus giving control of phase in software. I think.

Here a person uses two pots to control the frequency and duty cycle of one of the PWM outputs of an Arduino, I think. Or he might be using both outputs in just the manner you need, one for f and the other for %. The pots don't actually control the motor; the Arduino reads a voltage value from the pots, translates that into a numerical value between 0 and 255, and passes that to the PWM stage digital controller. So the desired numerical values for f and % can be sent by any means or even hard-coded into the program. The second PWM output can be controlled in the same way, and the two can be synched for phase angle in the program. I think.

http://www.youtube.com/watch?v=p5hzv6m_8fo

Arduinos are easy to program, especially if you know c or c++, and there is a _lot_ of help on the internet for Arduino and Arduino clone users. The "Fry's" electronics store chain even usually stocks an Arduino clone line of products called "Osepp"; I have several of these and they are really powerful, can do just about anything you can think of requiring analog or digital inputs controlling analog or digital outputs.

[kEhYo77]

I hate to play the clever one. But I have to tell you, that the L298N is not useful. You can only supply one voltage to the coils (full step). It may be possible to implement a different phase shift than 90° (but I doubt even that).

You do it by PWM Mr. Clever ONE
Read about direct digital synthesis!


Here is an example http://interface.khm.de/index.php/lab/experiments/arduino-dds-sinewave-generator/

[vrand]

The attached document explains how Mr. Figuera's "infinite energy machine" works.
It is amazing how we keep recycling old concepts over and over again. And then, we even claim that we are the inventors.

Bajac


I NOTICED THAT FIGURE 21 IS IN ERROR. PLEASE, REPLACE PAGE 15 WITH THE ATTACHED ONE!

Thank you for sharing, keep up the good work!
Cheers

[conradelektro]

You do it by PWM Mr. Clever ONE
Read about direct digital synthesis!

Here is an example http://interface.khm.de/index.php/lab/experiments/arduino-dds-sinewave-generator/

The DRV8834 (and practically all stepper motor driver ICs) do chopping (at a high frequency) and one can in principle implement a chopper with a microprocessor. But you have to add two full bridges (or at least two half bridges) in an external circuit (and supporting components) in order to get some power (e.g. +-10 Volt and 1.5 Ampere) for driving the Figuera transformer.

My argument is price (less than 5.-- Euro for the DRV8834), the avoidance of a lot of soldering and reliability of operation.

But there are many ways to build a test bed for the Fiquera transformer, I just want to come up with a versatile, cost effective and usable contraption.

I am not a salesman for stepper motor driver ICs, I just happen to know what they can do.

Greetings, Conrad

P.S.: Speeding up and slowing down a stepper motor means to vary the time between steps. "Micro stepping" happens in between steps and tries to smoothly push the rotor from one step to the next by varying the current through the coils at step N and through the coils at step N+1 (which happens to be similar to Fiquera's idea). So, Fiquera's idea is similar to what happens between step N and step N+1 in a stepper motor when doing "micro stepping".

[kEhYo77]

My argument is price (less than 5.-- Euro for the DRV8834), the avoidance of a lot of soldering and reliability of operation.

It's my argument too, L298N is less than 2 Euro
So an Arduino + L298N is very cheap. No problems in soldering, no additional components needed, only freewheeling diodes across the coils and few small caps and inductors for lowpass filtering. (see the example I provided)
By software output signal chopping (PWM) we can control 2 independent full H-bridges inside L298N having TWO sine wave signals (or any other type of signal such as saw-tooth) up to 35 kHz on its outputs.
It means variable current as well...

You can't go cheaper/simpler than that, just wait and see...

Greeting from Poland where the price matters