Please vote for one!!!
 

Hi all,

I would like to know form all of you guys and girls, which system would you prefer:

1: High Volt (up to 14S lipos)
2: Low Volt (up to 6S lipos)

Here are just a few inputs: 200A and 6S (25.2 volts fully charged (4.2v per cell), 22.2 volts nominal(3.7v per cell)) equals 4440 watts now 110A and 12S (50.4 volts fully charged (4.2v per cell), , 44.4 volts nominal (3.7v per cell)) equals 4884 watts. Now those might be Max AMPs and to handle the 200A controller one would need the highest quality and capacity lipo pack to get a good 20-30 minutes of run time (Not sure how long it'll last in race condition). Now with 110A a good quality 2200 or 2500mAh packs will give the same run time. Keep in mind you can still use 6S lipos with the 12S controller. Please vote 1 for HV or 2 for LV and post a comment of what you think.

Regards.

I vote for: 1 HV

I for example have used 44.4 volts and was really happy. I also used 10S A123 and 10S TP with much enjoyment. My set up is: Schulze 40.160, Neu 1521/1Y. With the 1521/1Y I'm using 6S lipos. So you see, even though my controller can handle 14S lipos I can still use 6S. Now if I wanted more torque and run less AMPs all I have to do is throw my 1521/1.5Y and 10S lipos. The choices for motors and batteries in a HV system is more flexible then with a 6S system.

+1 for the HV

Another plus for using batteries with 2000-2500mah is that the cells are shorter and can be packaged easier, plus the a123 users would beifit in 10-14s 1p battery configurations, compared to 2p.

I vote for 1 HV.....plenty of 6S controllers out there already.

I vote for 1 HV because anything less would just suck!

i vote hv also. not much on the market for hv car application. the 6s has simular numbers a mmm is suposed to have so you'll compete with it. HV BABY!

Vote for HV as well.

HV!!! woot!

Another vote for the Higher Voltage.. :)

+1 for HV.

Why are you asking, btw? Are you trying to decide which one to produce? I thought you were already working on an HV model.

maybe he's deciding which first. another vote from my self and daughter

HV

+1 for HV

Here: http://www.rctech.net/forum/showthre...=192048&page=8 post #238 is where it started. I'm still waiting for my scratch built 14S controllers to be done. I'm just wondering what a company with skills would be able to do.

HV!!!

Who cares what RCT people say, we here want HV!

High voltage all the way!! :yes:

1.

I want a relatively inexpensive HV CAR ESC, so I can ditch the mechanical brakes on my Savage and MT2 speed trucks (both run 33v from A123).

6s seems to be enough for me most of the time. I did play with a 8s setup once just for kicks and it ran very well, but with quality components the 5s and 6s setups run plenty cool and efficient for me for the most part.

Is it really cheaper to buy a 10s or 12 2200 mah pack vs a 4s, 5s or 6s 5000mah pack? Seems like you are just trading cell size for cell quanitity and the price will shake out about the same.



I'll put it this way... If the 12s 200amp controller was the same price as the 6s 200 amp controller Id buy the 12s all other things being equal. But if the 12s controller costs twice as much I'll stick with 6s.

+1 for HV

High Voltage.....................:gasp:

A 12S 100A would be the same as a 6S 200A controller in terms of power and they can be made to be the same price, it all depends on the company making them. With so many people buying 8000, you will see that going with the smaller packs helps a lot in terms of price, weight and placement of the packs in your veicle. Example: 2 3S 8000mAh ($235.48 and 545 grams each)= $470.96 and 1090 grams, now 2 6S 2200mAh ($149.99 and 340 grams each)= $299.98 and 680 grams. The 8000mAh packs each have the following dimensions: 44mm X 137mm X 38mm. The 2200mAh packs each have the following dimensions: 51mm X 33mm X 107mm. jhautz with this little info would you still vote for LV or would you go with HV?

But thats an unfair comparison, just because lots of people choose the 8000 doesnt mean you can evenly compare 6s 8000 to 12s 2200. Looking at the power each pack provides (taking 3.7v nominal cell v) thats about 177Wh from the 6s and under 100Wh from the 12s, of course the 12s will be smaller and lighter...

And on top of that, I've noticed people tend to choose th 8000 for 3s and 4s setups, and then 4 or 5000 for 6s...

Sound like the HV will be versital enough and you can run it at a lower voltage. The HV gives a person options. I vote the HV.

This is just to show some of the advantages of HV. I use all kinds of voltage in my RCs and I really want an HV systems from one of the US based companies. Yes, it's a unfair comparison, but what is more unfair is only having to go overseas to find HV capable controllers for cars. Most of the things I hear about conversions is how heavy my RC is. I'm not saying you can only stick to 12S 2200 or 2500mAh, but it was mentioned to show the weight difference. Please vote for the one you would like.

I vote for: 1 HV

still vote for HV. can you please tell me the approximate dimensions of the controller? and would it be possible to make a 150-200a HV controller?

lutach... Your not telling me anything that I didn't understand when I wrote my first reply.

I didn't "vote" for LV, I said I wouldn't pay allot more for the HV and that 6s seems to be plenty in my experience. If you cant get a truck to run cool on a well setup 6s rig, then you have problems.



As far as your battery size and cost argument please see below.

My thoughts exactly. Comparing apples and oranges here. Give me a comparison with the same amount of potential energy in both setups and then tell me how much "cheaper" and "lighter" it is.


This question is like hammer or screwdriver.... which one is better? Unless you know the "for what" you cant answer it. I am just trying to give you some context around my thoughts. There isn't an answer that is black or white IMO.

HV is nice.. but 6S is not Low voltage either.. LOL..

they're both nice.. and definately powerful.. but with higher voltage, you could use thinner wires because of the lower amp draws.. I think that's the only advantage... and a little bit more efficient...

a fair comparison would be 12S 4000mAh vs 6S 8000mAh... would be the same...

1 for hv

If my 200A controllers were to be built they would have the following dimensions: 105X74X17. For comparison the Schulze 40.160 has the following dimensions: 120X71X20. Now this is mainly because of the DPAK MOSFETs. With new technology in MOSFETs available a manufacturer can make them smaller. One example that I like a lot is the HV110 from Castle. Now the HV110 uses the Si4470 http://www.vishay.com/docs/71606/71606.pdf. Here are 2 components with 8-SOIC footprint that puts out some good number: NXP (Philips) http://www.nxp.com/acrobat/datasheets/PH1875L_1.pdf and Renesas http://documentation.renesas.com/eng...hat2266hds.pdf.

I like the HV but would want a higher current rating so if I choose to run LV that day (or in a certain vehicle) I can do so without worry of taxing the speed control and heating it up. HV is great and definitely the better way to go, no doubt there, but not everyone has the means to make the switch just yet. New chargers, batteries, motor's, etc. cost money, a decent amount of money. Buying a new controller would be step 1 in upgrading, then the other equipment follows. So while I'm saving to upgrade I want to be able to run my new controller in my current setup. Maybe that's just me though. An idea could be to do two versions, one of which is high amp. (I believe Castle has four versions of their new Hydra, 60, 120, 180, and 240 amps, 50v max)

Anyway, I would still rather see a HV controller purpose built for cars, I just worry about new guys who want the best x product, break it, and want it to be covered even though it was their fault and didn't bother to read any instructions. Grrrr... I remember when I was in Japan and I was helping a guy get his Mad Force running. I pull off the body and see there's no air filter. I said, "Dude, your air filter fell off." to which he replied, "Oh, no it didn't, I took it off because it felt more powerful when it was off.". I was stunned. The thing is, some people just aren't as into the hobby as much as the people on this forum are, for example. And they'll be some of the ones to buy this controller.

Sorry for the rant:oops:

Edit: Is the controller going to be 100 amp 12s or 200 amp 12s? 200 amp is great, I was referring to 100 amp when I started my post.

The components I mentioned above are more then twice as powerful as the Vishay used in the HV110, so in reality if you go with the other you can have a controller put out over 200A. What we are trying to do here is just to get a vote for which system would you like to see the US manufacturer come out with. Current sensing can help out incase someone goes over what the controller is capable of.

I vote 12S
I plan to run 2x 4S Lipo in my 1/8th scale and 1x 4S Lipo in my 1/10th scale
vehicles
A 100 amp esc is plenty for either scenerio above seeing how my avg amp draw varies between 35-45amps
One thing to keep in mind is the all mighty ROAR and other sanctioning bodies that currently limit MT's to 4S :diablo:

I don't like to play by ROAR rules. Specially when a few years ago Trinity had a big fuss about brushless and even put adds in magazines. Look at them now. Also LIPOs, it's funny when some big players in the hobby industry got into lipos ROAR went ahead to approved them. ROAR is like the FIA and F1 racing. I used to love watching Nelson Piquet driving his little 1.3L 1300HP turbo engine car around the tracks. Lets not forget about my all time favorite Group C. I think there should be some new form of sanctioning body that allows new technology to e used. It would prove if a product is worthy for us consumers to use.

I want to run 9S A123. So I would vote HV.

Why becuase I set my packs up for 3s and 3 of them would be great. If I run 6s 2P then I have more weight then I want.

HV gives you more options it's not that you always need more power sometimes it is better for more run time without simple adding twice the batteries. After all we all know that you can not run 6s1.5P

Highflier

This is a good one on HV:

Found on this site: http://www.zerorc.com/wram-show-2008-report

"Speaking of the T-Rex 450, I chatted with Joe Ford at the Castle Creations booth, who flies his on 12S LiPos. That's not a typo - he uses four 3S 480 mAh batteries wired in series, for a total of 44.4 volts. Using a Castle high voltage speed controller, he draws only 2 amps at full throttle and full collective! He also hinted that controllers with switching BECs were under development, to meet the demands of high-draw digital servos".

My license plate says it all.

That is nice. I guess I'm not the only one who got electrocuted a few times in the past :lol:. I must say that I reather get 220V flowing through my body then 12V and some crazy amount of AMPs!

I would say HV for all out power and the best running. However, the simplicity of a mild KV motor and a 4S/5S setup properly geared is the best for racing in my opinion...

My record so far, and one I don't want to break, is 43kV. (Dam you, Nikola!)

I've been hit by 600 Volts @ 25Amps... it did not feel good let me tell you.. my palms had 4 prong marks and was smoking...all of my joints were very tingly..