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Author Topic: Gravity assisted power project- GRAM  (Read 47001 times)

Low-Q

• Hero Member
• Posts: 2589
Re: Gravity assisted power project- GRAM
« Reply #90 on: October 18, 2016, 05:19:40 PM »
Just a tip for your project:
If you want to calculate energy, you must multiply torque with displacement. Torque is usually measured in punds pr feet or Newton per meter radius.

A buck converter is useful. These small devices increase voltage output on expense on current input. If you want to power a 10W load that runs on 20V @ 0.5 Ampére, and the input voltage is 10V, then the buck conveter will draw 1 Ampére from the input. So a buck converter does not increase energy output. The more expensive ones have an efficiency of approx 90-95%, which means for each watt output, it draws 1.05 - 1.1W at the input. Think of a inverted pulley with ropes. You must displace 1 meter of rope at 2kg force to lift a 1kg weight 2 meters up.

Good luck :-)

Vidar

Re: Gravity assisted power project- GRAM
« Reply #90 on: October 18, 2016, 05:19:40 PM »

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #91 on: October 19, 2016, 04:20:12 PM »
DC to DC step down converter = Buck converter

https://youtu.be/B3dLzZZ5jKQ

Low-Q

• Hero Member
• Posts: 2589
Re: Gravity assisted power project- GRAM
« Reply #92 on: October 19, 2016, 09:06:08 PM »
You can also buy them as DC to DC step UP converters. Amazingly how stable the output voltage is when you load them. I use such a converter to power my DIY aux head lights on my car. From the 12V car battery, this converter outputs 30V @ 3.2A, and if I hook off the load, the voltage is still 30V. I had to hook it directly on to the battery with a 10A fuse, and a relay, because the converter draws 9A from the battery, and the fuse in the car will blow if I power the converter directly from the head lights.
My LED aux lights are 2 x 5 LEDs at approx 10W each. Mine can deliver approx 160W max. Bought on DX.com.

Vidar

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #93 on: October 22, 2016, 03:37:57 PM »
https://youtu.be/uWsDc0oMrmI

proceeding to fabricate  Milkovic 2 stage oscillator  configuration

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #94 on: October 22, 2016, 09:18:39 PM »
https://youtu.be/lUm_nV3TRlQ

I will be adding a gear train at the output and use a buck converter at the PMA output.

Re: Gravity assisted power project- GRAM
« Reply #94 on: October 22, 2016, 09:18:39 PM »

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #95 on: October 25, 2016, 03:05:02 PM »

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #96 on: October 25, 2016, 06:27:35 PM »
Project on hold until Spring.

Re: Gravity assisted power project- GRAM
« Reply #96 on: October 25, 2016, 06:27:35 PM »

webby1

• Hero Member
• Posts: 3147
Re: Gravity assisted power project- GRAM
« Reply #97 on: October 26, 2016, 01:21:44 PM »
Unfortunate,, Nothing serious I hope.

ramset

• Hero Member
• Posts: 6182
Re: Gravity assisted power project- GRAM
« Reply #98 on: October 26, 2016, 02:00:57 PM »
is it the Chill in the air ? [an unheated shop can be most uncomfortable to work in the winter

your tenacity in this quest is inspiring.

Thanks for sharing your work !
Chet K

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #99 on: October 26, 2016, 02:56:42 PM »
Hi, after a summer of experimentation I found that the fewer moving parts the better, a large flywheel sucks a lot power from the system, and the two stage oscillator appears to be the best way to use a pendulum. I will purchase a hand warmer and try to continue when I can. Cheers

This is a small project I did a few years ago.
https://youtu.be/nfoDyKCA3xs  warm, it is a gravity device

Re: Gravity assisted power project- GRAM
« Reply #99 on: October 26, 2016, 02:56:42 PM »

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #100 on: October 27, 2016, 08:44:39 AM »

CG2016

• Newbie
• Posts: 20
Re: Gravity assisted power project- GRAM
« Reply #101 on: October 28, 2016, 01:18:46 AM »
Yep, it looked like it was getting out of hand.
Too many components. All that friction adds up.
Simple is better.

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #102 on: October 28, 2016, 02:59:49 AM »
https://youtu.be/Z3_DKdiN1w4

need 4 running in parallel, driving one output shaft to the gear train

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #103 on: October 28, 2016, 08:56:52 PM »

burnit0017

• Full Member
• Posts: 215
Re: Gravity assisted power project- GRAM
« Reply #104 on: October 30, 2016, 11:06:07 PM »