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## Solid States Devices => solid state devices => Topic started by: dreamyear on January 27, 2013, 11:36:02 AM

Title: self charging electric car (prototype 1)
Post by: dreamyear on January 27, 2013, 11:36:02 AM

self charging electric car

capturing back EMF to capacitor....and discharge capacitor back into battery

Title: Re: self charging electric car (prototype 1)
Post by: Michaelpier on January 27, 2013, 01:03:58 PM
Nice work dreamyear,
what is the difference between circuit-picture 1 and circuit-picture 3 ?

Michael
Title: Re: self charging electric car (prototype 1)
Post by: dreamyear on January 27, 2013, 02:34:10 PM
Nice work dreamyear,
what is the difference between circuit-picture 1 and circuit-picture 3 ?

Michael

they are both same....
Title: Re: self charging electric car (prototype 1)
Post by: gotoluc on January 27, 2013, 05:42:21 PM
Hi dreamyear,

it's a good idea to experiment with trying to collect DC motor coil flyback.

I'm trying to understand how your mechanical switch is turned?... it looks like it's turned independent from the hub motor (L1)?... if so, how would the timing work for only the L1 flyback to be directed to the capacitor at the right moment?

I'm not saying it can't work, just trying to understand your experiment. I have tried this in the past but the timing and switching circuit is the main problem.

Thanks for sharing

Luc
Title: Re: self charging electric car (prototype 1)
Post by: dreamyear on January 27, 2013, 06:21:06 PM
Hi dreamyear,

it's a good idea to experiment with trying to collect DC motor coil flyback.

I'm trying to understand how your mechanical switch is turned?... it looks like it's turned independent from the hub motor (L1)?... if so, how would the timing work for only the L1 flyback to be directed to the capacitor at the right moment?

I'm not saying it can't work, just trying to understand your experiment. I have tried this in the past but the timing and switching circuit is the main problem.

Thanks for sharing

Luc

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[size=78%]
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[size=78%]it's very simple [/size]switch[size=78%] .. u can do this with realy but i prefer this way [/size]
[size=78%]
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[size=78%]i [/size]attached[size=78%] pic     [/size]

Title: Re: self charging electric car (prototype 1)
Post by: dreamyear on January 27, 2013, 06:21:35 PM
u can do this with realy but i prefer this way
Title: Re: self charging electric car (prototype 1)
Post by: dreamyear on January 27, 2013, 06:30:25 PM
Hi dreamyear,

it's a good idea to experiment with trying to collect DC motor coil flyback.

I'm trying to understand how your mechanical switch is turned?... it looks like it's turned independent from the hub motor (L1)?... if so, how would the timing work for only the L1 flyback to be directed to the capacitor at the right moment?

I'm not saying it can't work, just trying to understand your experiment. I have tried this in the past but the timing and switching circuit is the main problem.

Thanks for sharing

Luc
Title: Re: self charging electric car (prototype 1)
Post by: gyulasun on January 27, 2013, 06:55:33 PM
Hi dreamyear,

If I can see correctly, you show 3 different schematics:
1st is in the beginning of your video with a bridge rectifier
2nd is in your first post, one diode and you discharge the capacitor directly into the battery
3rd is in your Reply #4 above, one diode and you dicharge the capacitor via the motor into the battery

Ah, I have just noticed you modified your schematic, your Reply #5 above and now this latter circuit seems to be same as the one in your very first post.

I think that using a full wave diode bridge is better than using a single diode because a DC motor produces spikes with both polarities to deal with when the brushes cut the current (in that moment the normal induced voltage is present across the rotor coils).

"I'm trying to understand how your mechanical switch is turned?... it looks like it's turned independent from the hub motor (L1)?..."

Thanks,  Gyula
Title: Re: self charging electric car (prototype 1)
Post by: gotoluc on January 27, 2013, 06:55:40 PM
I'm sorry, I just tried your circuit and the capacitor is charged by the battery and no L1 (motor) flyback goes to capacitor.

Luc
Title: Re: self charging electric car (prototype 1)
Post by: gyulasun on January 27, 2013, 07:08:53 PM
Hi dreamyear,

Do you happen to have an oscilloscope?  If yes, please check the current waveform across a 0.1 Ohm power resistor, just insert the resistor in series with the negative pole of the battery and show the waveform across it.  I indicated in your schematic where I think the resistor.

Thanks, Gyula
Title: Re: self charging electric car (prototype 1)
Post by: conradelektro on January 27, 2013, 07:12:41 PM
@dreamyear: besides the circuit diagram problems, the motor is not on all the time. This will make it weaker (less torque).

Title: Re: self charging electric car (prototype 1)
Post by: vrand on January 27, 2013, 08:23:55 PM
u can do this with realy but i prefer this way

Very interesting experiment, keep up the good work! Cheers
Title: Re: self charging electric car (prototype 1)
Post by: gyulasun on January 27, 2013, 09:49:06 PM
Hi dreamyear,

I would like to show you a schematic which could be used and you may wish to hook up your DC motor as shown here:
http://jnaudin.free.fr/ossiemotor/images/ossiemotorv13.gif   from Naudin site: http://jnaudin.free.fr/ossiemotor/indexen.htm

Your DC motor would connect to the right hand side to replace the seriesly connected air core coils and your two mechanical switches would be modified in timing: BOTH would be needed to switch ON at the same time and then OFF also at the same time. In the simplest case you may wish to position the rotary prongs at 180° of each other (like when a clock shows 6 o'clock for instance: the minute-hand and the hour-hand form a straight line and at their ends they touch the stationary contacts).  In the original schematic Naudin and Ossie used reed switches that were triggered by control magnets simultenously ON or OFF.

This way all the spikes right after the switch-off of the two switches can immediately go back into the battery via the fast diodes which are permanently hooked up, they form a full wave diode bridge.

As conradelektro noticed for your setup, your DC motor has a smaller torque and this will be so with this suggested setup too BUT for the test purposes this does not matter, once you are able to measure the power taken out of the battery and to measure the real torque.  OR if you have an oscilloscope, you could see the current pulses going out of the battery and going back into it (this latter is seen when the switches are just switched OFF) as I described in my previous post above so that comparing the two pulses we could estimate power levels.

If you build this setup, try to use it first without the puffer capacitor shown in parallel with the battery and later connect it. Of course you do not need to use the series 22 Ohm resistors either.

rgds,  Gyula
Title: Re: self charging electric car (prototype 1)
Post by: dreamyear on January 28, 2013, 02:31:33 AM
I'm sorry, I just tried your circuit and the capacitor is charged by the battery and no L1 (motor) flyback goes to capacitor.

Luc

i'm sorry... use bride rectifier instead  single diode.............are u serious?.. i get  50v back emf  with 24v dc mtor

Title: Re: self charging electric car (prototype 1)
Post by: dreamyear on January 28, 2013, 02:39:12 AM
Hi dreamyear,

Do you happen to have an oscilloscope?  If yes, please check the current waveform across a 0.1 Ohm power resistor, just insert the resistor in series with the negative pole of the battery and show the waveform across it.  I indicated in your schematic where I think the resistor.

Thanks, Gyula

sorry   i do not have   oscilloscope
Title: Re: self charging electric car (prototype 1)
Post by: dreamyear on January 28, 2013, 02:51:41 AM
I'm sorry, I just tried your circuit and the capacitor is charged by the battery and no L1 (motor) flyback goes to capacitor.

Luc

this is boost  converter diagram .....place  L1  with DC motor...and change single diode into bridge recifier
Title: Re: self charging electric car (prototype 1)
Post by: dreamyear on January 28, 2013, 03:08:05 AM
Hi dreamyear,

it's a good idea to experiment with trying to collect DC motor coil flyback.

I'm trying to understand how your mechanical switch is turned?... it looks like it's turned independent from the hub motor (L1)?... if so, how would the timing work for only the L1 flyback to be directed to the capacitor at the right moment?

I'm not saying it can't work, just trying to understand your experiment. I have tried this in the past but the timing and switching circuit is the main problem.

Thanks for sharing

Luc

"I'm trying to understand how your mechanical switch is turned?... it looks like it's turned independent from the hub motor (L1)?..."

Title: Re: self charging electric car (prototype 1)
Post by: elecar on May 28, 2013, 04:26:06 PM
This is a great experiment but I can see the inefficiency of the current configuration.
A better solution would be to use a bank of caps instead of a single cap and increase the switching so the motor is being powered more often than every 360 degrees. I would also do away with the remote motor powering the switching since that is an extra draw not needed.

The more caps you can include and the more switching the better, you can liken it to a conventional petrol engine. The more cylinders you have the smoother it runs.

I will use 4 caps to explain. (but you could use more)

4 caps will require 8 switches. 4 switches for dumping and 4 for powering the motor.

Now instead of your power/dump cycle being how it is currently you can adjust it to every 90 degrees
(360 / 4 cycles = 90)

You would need to build a distributor plate that sat at the rear of the motor to fix the 8 switches to.

Every 90 degrees the battery would supply the motor, as the motor rotates it would engage/ disengage the switches via a cam fixed to the shaft of the motor.

You would need to have the switches fixed in pairs with the leading switch in each pair being the dump and the second switch in each pair being the supply to motor.

Picture a clock, you would have a switch just before 12 o’clock  and a switch just after 12 o’clock and repeat at 3, 6 and 9 o’clock.

As the cam approaches the 12 o’clock position, it activates the dump switch  just as it passes it activates the power switch. As it travels to toward the 3 o’clock position one of the caps would be collecting EMF. As the cam hit’s the first switch at the 3 o’clock position it would dump the charge to the battery. As it passes the 3 o’clock position it would activate the power switch and the cycle starts again.
The more switching that can take place the smoother the motor will run and less torque lost, the maximum switches used would be governed by how quickly the caps can charge during a cycle.

You may even be able to increase the power available by including an alternator/generator driven by the motor. Perhaps charging a second battery whilst the first is in use.
Title: Re: self charging electric car (prototype 1)
Post by: bryanwizard on June 04, 2013, 05:25:17 AM
nice concept, would love to see you progress