This is something I'm a little unsure of. The AMPs the ESC records don't seem to corelate with what's coming out of the battery. I noticed that on one of Alex's videos the cable to ESC was flowing 265A yet the ESC recorded 320A+. Maybe @AlexLTDLX can clarify ?
Want to build 500Hp electric turbo, people with experience please chime in
- Thread starter Vetal
- Start date
You're comparing apples to oranges here, you can't compare directly the type of loads an RC car would pull to those of a supercharger, also heat is energy and the differences you are seeing at the ESC vs anywhere else is an element of efficiency, work is being done inside the ESC as well as the motor. 100% efficiency is where you would expect to see the energy in equal to the energy out and we know neither the ESC or motor is 100% efficient. Without having to research and get "sciencey" with equations, I suspect the power capacitors contribute play a role in this process also.
You will need to focus on the power required to drive a given compressor to the demand level you have set. The Borg Warner turbo matchbot I believe it is called can give you a range estimate of the power level you'll need by entering your system specs and having them calculated and plotted on the various compressor maps they offer.
@AlexLTDLX did you try to turn charger on while in hands? I don't remember for sure. I am interested, does it really cause considerable axial force on the compressor
Get a 48v alternator from a hybrid car and figure out the control wiring, or purchase an conventional style 48 volt alternator and regulate up or down to the voltage and current rate you need. Both can be found on ebay for around $3-600. Or you can buy an external charger in the right voltage range for far less money and plug the car in while parked.
New 1800W 40A Current DC-DC Constant Voltage Constant Current Boost Power Modul | eBay
It is very powerful. With airfoil-type heat dissipation, the heat dissipation effect is very good, and the output power is even greater (the power of the 48V input and fan can reach around 1800W). Output power: 1800W.
www.ebay.com
Sounds too complicated 
I see that Lipo chargers can also be powered by 6-30V DC input. Question is, can you simultaneously have batteries plugged into ESC (and dumping power) and plugged into charger? Like a normal car battery. And like any other electronics like laptops, smartphones etc.
I see that Lipo chargers can also be powered by 6-30V DC input. Question is, can you simultaneously have batteries plugged into ESC (and dumping power) and plugged into charger? Like a normal car battery. And like any other electronics like laptops, smartphones etc.
Last edited:
If a charger is not made for this purpose I would not recommend this. Chargers in your phone are quite advanced, while normal charger will follow a predetermined charger profile based on some parameters like 1/10 of charging current, a certain voltage etc.
When the battery is being loaded while charged, this might confuse the charger.
There are some chargers, like for boats / RVs etc, that are better suited for this. I might have found a decent charger but need to look into this first, and probably. test a bit as well, before I can recommend this one.
When the battery is being loaded while charged, this might confuse the charger.
There are some chargers, like for boats / RVs etc, that are better suited for this. I might have found a decent charger but need to look into this first, and probably. test a bit as well, before I can recommend this one.
I believe you're both over thinking this. The focus should be on a functional electric supercharger, as for an onboard charging system, a simple on/off or open/closed circuit activated when the supercharger is in use can be deployed to disengage charging during that brief period, something as simple as a relay that is activated when voltage is applied to the motor. The smart charging systems of modern cars are designed mainly for efficiency in my observation.
There is talk of better battery life but they don't seem to be lasting any longer. Managing the charge load from the old continuous charging system to duty cycle charging does a better service to fuel efficiency however small.
In regards to this experimental subject a high capacity power supply makes the most sense in anything intended to be a daily driver so that recharging frequency is greatly reduced, or minimal relative to boost demand. You can't drive around town in boost for stretches much more than about 6-7 seconds and even that could be long enough to reach "Go to jail" speeds if caught.
Battery power with about 3 minutes of boost time would likely last me an entire day the way I drive, although my focus is on variable boost characteristic of a traditional turbo with an initial activation point of about 70% throttle input.
I left out the battery maintenance controller (BMS) for charging, but that would be your smart charger, this isn't complicated as long as you know your equipment specifications and requirements.
There is talk of better battery life but they don't seem to be lasting any longer. Managing the charge load from the old continuous charging system to duty cycle charging does a better service to fuel efficiency however small.
In regards to this experimental subject a high capacity power supply makes the most sense in anything intended to be a daily driver so that recharging frequency is greatly reduced, or minimal relative to boost demand. You can't drive around town in boost for stretches much more than about 6-7 seconds and even that could be long enough to reach "Go to jail" speeds if caught.
Battery power with about 3 minutes of boost time would likely last me an entire day the way I drive, although my focus is on variable boost characteristic of a traditional turbo with an initial activation point of about 70% throttle input.
I left out the battery maintenance controller (BMS) for charging, but that would be your smart charger, this isn't complicated as long as you know your equipment specifications and requirements.
I use a 12-48v on board charger made for RV vehicles that I bought off Aliexpress. My Alternator is a stock OEM 100A 12v. The charger is designed to charge while the battery is being discharged and this is how I'm running it. So far no issues at all with that. I have noticed that it pulls a few more amps while the batteries discharge but there still is sufficient Amps to run the coils etc. The charger has two settings 35A and 70A (@12v). I use the 35A setting and have found this is plenty for street use when paired with my 20Ah LTO batteries. Highest draw I have seen so far is 260A @ 47v. I figure the extra 10A@50v from the charger is adding to that. For a track setup I'd go to a larger (12v) alternator and swap to the 70A setting.
www.electrifiedboost.com
RX8 Renesis Rotary eSC
I'm looking at doing something like this into my mx5 nd that i engine swapped in a 3.6l LFX, Trying to get my head around all the calculation etc lol
www.electrifiedboost.com
Is it some RV speciffic? Can you share the link maybe?I use a 12-48v on board charger made for RV vehicles that I bought off Aliexpress. My Alternator is a stock OEM 100A 12v. The charger is designed to charge while the battery is being discharged and this is how I'm running it. So far no issues at all with that. I have noticed that it pulls a few more amps while the batteries discharge but there still is sufficient Amps to run the coils etc. The charger has two settings 35A and 70A (@12v). I use the 35A setting and have found this is plenty for street use when paired with my 20Ah LTO batteries. Highest draw I have seen so far is 260A @ 47v. I figure the extra 10A@50v from the charger is adding to that. For a track setup I'd go to a larger (12v) alternator and swap to the 70A setting.
RX8 Renesis Rotary eSC
I'm looking at doing something like this into my mx5 nd that i engine swapped in a 3.6l LFX, Trying to get my head around all the calculation etc lol
I see a heap of projects half finished on this site :
Before you start spending money , ask yourself if you are prepared to spend a ton of time learning about how all this stuff works. You need electrical know how/wiring skills/fabrication skills/tuning skills and LOTS of spare time. If you don't have one of those you're going to need lots of money to pay someone else.
Before you start spending money , ask yourself if you are prepared to spend a ton of time learning about how all this stuff works. You need electrical know how/wiring skills/fabrication skills/tuning skills and LOTS of spare time. If you don't have one of those you're going to need lots of money to pay someone else.
That looks like a great charger, does it allow you to adjust the charging voltage for LTO cells?
I’m going with a Victron Orion charger myself. Similar concept, and you can modify the end voltage using the app. Victron is very well known for their electronics for off grid and recreational vehicle solutions. This particular charger also is not even that expensive.
www.victronenergy.com
I’m going with a Victron Orion charger myself. Similar concept, and you can modify the end voltage using the app. Victron is very well known for their electronics for off grid and recreational vehicle solutions. This particular charger also is not even that expensive.
Orion-Tr Smart DC-DC Charger Isolated | Victron Energy
The Orion-Tr Smart DC-DC charger is an adaptive 3-stage charger (bulk – absorption – float) designed for dual battery systems, such as in vehicles or on boats where the starter battery (hence the alternator) is used to charge the service battery. The name "Smart" comes from its built-in...
www.victronenergy.com
Last edited:
There are 8 different charging programs, none of which were designed for LTOs. But seeing as I couldn't find any alternatives at the time I just bought it and xd my fingers. It could benefit from more aggressive charging but otherwise it works great.That looks like a great charger, does it allow you to adjust the charging voltage for LTO cells?
I’m going with a Victron Orion charger myself. Similar concept, and you can modify the end voltage using the app. Victron is very well known for their electronics for off grid and recreational vehicle solutions. This particular charger also is not even that expensive.
Orion-Tr Smart DC-DC Charger Isolated | Victron Energy
The Orion-Tr Smart DC-DC charger is an adaptive 3-stage charger (bulk – absorption – float) designed for dual battery systems, such as in vehicles or on boats where the starter battery (hence the alternator) is used to charge the service battery. The name "Smart" comes from its built-in...
