Railroad Line Forums
Railroad Line Forums
Username:
Password:
Save Password


Register
Forgot Password?
  Home   Forums   Events Calendar   Sponsors   Support the RRLine   Guestbook   FAQ     Register
Active Topics | Active Polls | Resources | Members | Online Users | Live Chat | Avatar Legend | Search | Statistics
Photo Album | File Lister | File Library
[ Active Members: 0 | Anonymous Members: 0 | Guests: 104 ]  [ Total: 104 ]  [ Newest Member: NP2626 ]
 All Forums
 Model Railroad Forums
 Dead Rail Forum
 An Experiment in Wireless Charging

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

 Posting Form
Screensize:
UserName:
Password:
Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List Spell Checker
   
Callouts: Insert Speech Icon: duh! Insert Speech Icon: oops! Insert Speech Icon: sigh! Insert Speech Icon: ugh! Insert Speech Icon: wow! Insert Speech Icon: yeah! Insert Speech Icon: ok! Insert Speech Icon: yes! Insert Speech Icon: no!
Message Icon:              
             


Smilies
Alien_125 [:-alien] Angel_125 [:-angel] Angry [:(!] Apple_125 [:-apple]
Approve [^] Ashamed_125 [:-ashamed] Banghead_125 [:-banghead] Baseball_125 [:-baseball]
Basketball_125 [:-basketball] Batman_125 [:-batman] Big Smile [:D] Bigeyes_125 [:-bigeyes]
Bigeyes2_125 [:-bigeyes2] Bigmouth_125 [:-bigmouth] Black Eye [B)] Blindfold_125 [:-blindfold]
Blush [:I] Boggled_125 [:-boggled] Boring_125 [:-boring] Bouncy_125 [:-bouncy]
Brokenheart_125 [:-brokenheart] Bulb_125 [:-bulb] Bunny_125 [:-bunny] Captain_125 [:-captain]
Censored_125 [:-censored] Chef_125 [:-chef] Clock_125 [:-clock] clover_125 [:-clover]
Clown [:o)] clown_125 [:-clown] Cold_125 [:-cold] Cool [8D]
Cowboy_125 [:-cowboy] Crazy_125 [:-crazy] Cry_125 [:-cry] Cyclops_125 [:-cyclops]
Dead [xx(] Devil_125 [:-devil] Disapprove [V] Disguise_125 [:-disguise]
Dog_125 [:-dog] Doggy_125 [:-doggy] Dopey_125 [:-dopey] Drool_125 [:-drool]
Drunk_125 [:-drunk] Dunce_125 [:-dunce] Eight Ball [8] Evil [}:)]
Eyebrows_125 [:-eyebrows] Fight_125 [:-fight] Football_125 [:-football] Ghost_125 [:-ghost]
Glasses_125 [:-glasses] Gnasher_125 [:-gnasher] Goldfish_125 [:-goldfish] Golf_125 [:-golf]
Graduate_125 [:-graduate] Grumpy_125 [:-grumpy] Headache_125 [:-headache] Headphones_125 [:-headphones]
Hearts_125 [:-hearts] Hockey_125 [:-hockey] Hot_125 [:-hot] Hypnotized_125 [:-hypnotized]
Idea_125 [:-idea] Indifferent_125 [:-indifferent] Irked_125 [:-irked] Jester_125 [:-jester]
Jump_125 [:-jump] Jump2_125 [:-jump2] jumprefect_125 [:-jumprefect] King_125 [:-king]
Kisses [:X] Kitty_125 [:-kitty] Knockout_125 [:-knockout] Love_125 [:-love]
Magnify_125 [:-magnify] Masked_125 [:-masked] Mean_125 [:-mean] Mischievous_125 [:-mischievous]
Mohawk_125 [:-mohawk] Moptop_125 [:-moptop] Mouse_125 [:-mouse] Mummy_125 [:-mummy]
Nonono_125 [:-nonono] Ouch_125 [:-ouch] Paperbag_125 [:-paperbag] Party_125 [:-party]
Piggy_125 [:-piggy] Pirate_125 [:-pirate] Propeller_125 [:-propeller] Psst_125 [:-psst]
Pumpkin_125 [:-pumpkin] Question [?] Sad [:(] Scared_125 [:-scared]
Shades_125 [:-shades] Shake_125 [:-shake] Shock [:O] Shy [8)]
Sick_125 [:-sick] Sing_125 [:-sing] Skull_125 [:-skull] Slaphappy_125 [:-slaphappy]
Sleep_125 [:-sleep] Sleepy [|)] Slug_125 [:-slug] Sly_125 [:-sly]
Smgreen_125 [:-smile_green] Smile [:)] Smirk_125 [:-smirk] Snooty_125 [:-snooty]
Snorkel_125 [:-snorkel] soccer_125 [:-soccer] Sonar_125 [:-sonar] Sour_125 [:-sour]
Spin_125 [:-spin] Splat_125 [:-splat] Star_125 [:-star] Tapedshut_125 [:-tophat]
Tapedshut_125 [:-taped] Thumbdn_125 [:-thumbd] Thumbup_125 [:-thumbu] Tiger_125 [:-tiger]
Timebomb_125 [:-timebm] Toast_125 [:-toast] Tongue [:P] Tongue_125 [:-tong2]
Tophat_125 [:-tophat] Turtle_125 [:-turtle] Vampire_125 [:-vamp] Viking_125 [:-viking]
Weeping_125 [:-weepn] Williamtell_125 [:-wiltel] Wink [;)] Witch_125 [:-witch]
Xmas_125 [;-xmas] Yawn_125 [:-yawn] Yuck_125 [:-yuck]  

   -  HTML is OFF | Forum Code is ON
   Insert a File
 
  Check here to include your profile signature.
Check here to subscribe to this topic.
    

T O P I C    R E V I E W
Bernd Posted - 07/10/2018 : 2:29:44 PM
I'm going to experiment with wireless charging of battery operated HO scale locomotives.

I received my order for wireless charging boards from the Robot Store today. My hope is to see what can be done in this area of using battery power to run engines.

I'll post more in the next post in the next day or so. Hopefully DanT can coach me along in this project.

Bernd
15   L A T E S T    R E P L I E S    (Newest First)
Bernd Posted - 11/06/2018 : 08:41:01 AM
Sorry to hear about your medical condition. I hope it turns to the better.

Bernd
DanT Posted - 11/05/2018 : 10:41:46 PM
My work on wireless charging has been frustratingly slow.

Reason is, after a series of tests, we received mostly negative news today about my medical condition. I will be re-focusing on other matters, so wireless charging, and a lot of other BPRC projects, are on the back burner for the immediate future.

I regret disappointing some of you, but hope you understand. If I get some time, I'll post information on any progress I've made.

Dan

Bernd Posted - 10/20/2018 : 10:13:56 PM
Welcome aboard Neil.


Bernd
neiler Posted - 10/20/2018 : 8:26:03 PM
Bernd:

Thanks for the link to this forum and glad to find the interest high here as well. This thread has peaked my interest (again) so I hope to jump in with both feet.

NeilEr aka S&NE garden lines and the On30Umauma Railway, Hawaii
DanT Posted - 10/07/2018 : 7:19:54 PM

The loco in the video uses 8 AAA NiMH batteries (4.8V, 1,600mAh), a DelTang Rx43D-2-v5 Rx/ESC and a Swiss 6V, 9-pole coreless brushed motor. Can hardly believe I've been operating this engine for over 5 years. Happy to say it has never failed to perform.

https://www.youtube.com/watch?v=rUwTYucn6u8

BTW, I didn't use a voltage regulator for 2 reasons; Eneloops have a pretty flat output from full charge to depletion, and a voltage regulator would require a higher input voltage and use extra battery power.

The engine is being modified to include 2 Panasonic 18650 or 18500 Li-ion batteries. I'd like more power to pull 8 or more passenger cars. And, of course, it will have 2S wireless charging.

Dan
BurleyJim Posted - 10/07/2018 : 11:33:20 AM
Those Eneloop batteries also have a great 'shelf life'. I use them in my flash equipment and they may be stored for months and never seem to lose their charge. Like 'em a lot.

My thought on the rail sandwich wasn't worrying about spurious signals transmitted, as much as 'absorption' of energy.

Jim
Bernd Posted - 10/07/2018 : 09:03:37 AM
quote:
Originally posted by DanT

Bernd, don't give up on Ni-MH. They're not expensive, they have a flat performance curve, and Eneloop types have low self-discharge and are rated for 2,100 cycles. I bought some AA Twi-cell batteries last year rated at 1.2V and 2,500mAh. That's 3Wh per cell! So two in an "A" unit and two in a "B" unit, I would guess, gives you plenty of power and a good voltage (4.8V) for your regulator.

Dan



Dan,

You just gave me some new food for thought here. Never occurred to me to use four 1.2V batteries and a six volt motor with a 5 volt Deltang Rx. Might have something here.

Bernd
DanT Posted - 10/06/2018 : 4:37:22 PM

Bernd, don't give up on Ni-MH. They're not expensive, they have a flat performance curve, and Eneloop types have low self-discharge and are rated for 2,100 cycles. I bought some AA Twi-cell batteries last year rated at 1.2V and 2,500mAh. That's 3Wh per cell! So two in an "A" unit and two in a "B" unit, I would guess, gives you plenty of power and a good voltage (4.8V) for your regulator.

Jim, I don't know the effect, but when I start testing, I'll check it out. My gut feel was steel rails might have a small effect, and nickel-silver less so. My primary goal is to see if, in principle, wireless charging is practical. I suppose silver colored plastic rail could be used in the future, or plastic rail joiners now, if there was a negative influence from a charging track.

Dan
Bernd Posted - 10/06/2018 : 3:40:46 PM
quote:
Originally posted by BurleyJim
Any thought on whether the rails between the coils will deflect/diffuse some of the power transferring capability?

Will the length of the rails act as antennas to broadcast that signal around the layout? Maybe an old transistor AM radio would work to guess where that signal is going. That was an old way of listening to automotive ignition leaks.

You guys are having too much fun.

Jim


Hey this is model railroading, you're supposed to have fun.

Good question. I'm going to say it has no effect on the rails acting as antennas. I believe the output is to small to send it around on the rails. Do they still make AM transistor radios? I get the idea though.

Bernd
BurleyJim Posted - 10/06/2018 : 2:11:20 PM
quote:
Originally posted by DanT

Bernd,

In any case, that's the largest hole I'll have to deal with. For the 2" x 2" 5 Watt coil, removing ties from a section of Atlas Flex-Track should give me what I need.

Dan





Any thought on whether the rails between the coils will deflect/diffuse some of the power transferring capability?

Will the length of the rails act as antennas to broadcast that signal around the layout? Maybe an old transistor AM radio would work to guess where that signal is going. That was an old way of listening to automotive ignition leaks.

You guys are having too much fun.

Jim

Bernd Posted - 10/06/2018 : 08:45:34 AM
quote:
Originally posted by DanT

Bernd,

Not sure the hole saw would work. I'd have a circular groove, but the ties and the plastic roadbed in the middle would still be stuck to the rails. The Forstner bit, normally used for wood, makes holes with flat bottoms.


I didn't realize you were going for a flat bottom hole. I was thinking a thru hole.

quote:
BTW, I've come across a new Li-ion battery that fits most narrow, as well as wide body, diesel engine shells. It's the Samsung 21700-48G with an amazing 4,800mAh capacity at 3.6V. That's 17.28 Watt-hrs of energy! Price each is around $13. That's expensive, but prices do drop after introduction.


I remember you talking about upcoming battery improvement when we were discussing batteries on Freerails. You said there are going to be improvement's on batteries.

I'm starting to think of not using those Ni-MH batteries in the Atheran F units. Thinking of using one of the 21700-48G with a Dc step up voltage converter to 6 volts and change the motor over to a 6 volt motor. Will have to give that idea some thought.

Thanks for the update on batteries.

Bernd

DanT Posted - 10/05/2018 : 1:35:17 PM
Bernd,

Not sure the hole saw would work. I'd have a circular groove, but the ties and the plastic roadbed in the middle would still be stuck to the rails. The Forstner bit, normally used for wood, makes holes with flat bottoms.

In any case, that's the largest hole I'll have to deal with. For the 2" x 2" 5 Watt coil, removing ties from a section of Atlas Flex-Track should give me what I need.

BTW, I've come across a new Li-ion battery that fits most narrow, as well as wide body, diesel engine shells. It's the Samsung 21700-48G with an amazing 4,800mAh capacity at 3.6V. That's 17.28 Watt-hrs of energy! Price each is around $13. That's expensive, but prices do drop after introduction.

Theoretically, based on the 1.5Wh of power my BLI Hudson uses at medium-high speed, and assuming 15% for power losses, this means I could operate for almost 10 hours continuously, more likely 15-20 hours during an operating session where you run slow as well as fast, and you're occasionally stopped. My Hudson uses two batteries, so everything would be doubled. Batteries have come a long way in just a few years, and IMO are no longer a negative feature of BPRC operation.

BTW, I have operating data that supports this. At the Amherst show a few years ago, I ran my BLI Hudson with 8 passenger cars on two layouts, two hours on each layout. The engine is powered by two Panasonic 18650 batteries, each 3.7V/3,400mAh. I started with batteries fully charged at 4.2V, and when I returned home they were at 3.98V. Using the performance chart for these batteries, I could estimate an overall run time capacity of 12+ hours. This was fully detailed on the freerails.com website.

I'm reflecting my experience during actual operating sessions. If you run at high speed continuously, and/or pull heavy loads, or do not have efficient motors, do expect proportionately less run time. With all the progress in battery technology, I'm happy to continue running BPRC. Wireless charging will just make it better.

Dan

Bernd Posted - 10/05/2018 : 08:01:32 AM
Dan,

Sounds like great progress, even with the slight mishap. Perhaps a hole saw might have worked better. Not sure if they make them that small.

I haven't done much with the coils I have. Been to busy with house projects that nee to get done before that white stuff comes down and the weather turns colder.

Looking forward to see some pictures if you can get them posted.

Bernd
DanT Posted - 10/04/2018 : 5:00:10 PM
Finally picked up a larger Forstner drill bit for the 3 Watt Tx coil. Not recommending anyone try this. Even though I went super slow, a chunk of ties and roadbed went flying as the hole was finally made. Fortunately, the rails were not damaged and the hole looks good. So will finish up the charging track this coming weekend and continue with the engine rebuilds.

Have decided it takes too much time to make a test car. I'll install the Rx coils and boards on the loco and test without the shells on. The metal frames can withstand a mishap, but not so sure about the plastic shells.

Dan

Bernd Posted - 09/24/2018 : 08:46:29 AM
Dan,

That's some pretty exciting news. Can't wait to see what you've done.

Bernd

Railroad Line Forums © 2000-17 Railroad Line Co. Go To Top Of Page
Steam was generated in 0.23 seconds. Powered By: Snitz Forums 2000