drvosjeca said:
Im wondering what could i expect from double nuc12 setup on my dual motor scooter?
Im running stock at 2x1000Watt (3600Watt max) at moment, but im wondering how much power could i expect to push through without big impact on battery performance/range?
Also what im interested is if other screens work with these controllers, or having kit is a must?
thanks in advance
The LCD has several themes you can use. You need the LCD to program the controller and for EV status.
These are pretty great controllers.
Your EV will lose range with more current draw.
It's a safe bet your current draw is going to increase.
Exactly how much range you lose is dependent on your pack and your current draw.
Expect a Nucular 12 fet to be able to pull down 75 amps at 5kw and 66 volts.
IF you have 2 of them that's something like 150 amps.
It is quite possible that your pack and related wiring can't handle this much current loading.
You said 3600 watts max. No idea your pack voltage so I can't guess at an amperage.
It is probable that there is not a lot of "room" for more amperage.
If it is a manufactured scooter, they tend to not over engineer them very much as this adds cost.
Pretty much everything mass produced goes through some amount of value engineering.
This is where they look for ways to cut corners and manufacturing costs without impacting quality and performance too much.
If your scooter was made in China...expect value engineering to play a fairly significant impact on its capabilities for current handling.
No idea what motors you have.
I hope they have temp sensors in them and halls.
If not, add them. You want halls and temp sensing.
I do phase current tuning based on motor temps and torque output.
I pick what I feel is a safe value for initial set up.
Then I ride around a bit and watch the motor temps.
If the motor is getting too hot, I turn down the phase amps.
If it's not getting too hot, I turn phase amps up another 10%.
I check the feel of acceleration. With more phase amps, the motors ought to make more torque.
There is a limit to torque. All motors have a maximum amount of torque they can make.
You keep setting phase amps higher until you feel that torque is not increasing.
You also watch motor temps. More phase amps means more motor heat.
Go for the maximum phase amps possible that produces more torque without over heating the motors.
Just for long term reliability, I then back off phase amps by 5%.
Running at the maximum possible all the time is going to shorten the life span of everything.
Now go for a long ride...like 3 -5 miles at full power.
Keep a close watch on motor temps. You may see that your motors get too hot.
Turn down phase amps a little more until long ride motor temps stabilize at a safe temperature.
It is common that the motor can make more torque than is safe due to heat build-up.
Expect that you will turn down phase amps a fair bit below the maximum torque capability to keep the motor from overheating.
What is a safe motor temp?
If you look at typical wire used for winding motors, the common temp values are 160C and 200C.
Thanks to value engineering, it is common that the 200C wire is not used except in high end motors.
Assume that 160C is your maximum motor temp if you can't verify this.
I've run motors well over 200C and they can handle it SHORT term, but expect them to burn out at any moment.
The location of your temp sensor will impact how good it is at measuring motor heat.
You want it buried in the motor windings pretty deeply.
Deep in the windings is where the heat is the highest.
This is what you need to stay aware of.
Temps at the surface of the windings are going to be a lot less than down inside them.
160C on the surface of the windings is 220-250C deep inside them.
The Nucular controllers are a pretty significant improvement over previous generations of controllers. You will get a great controller with tons of features and options that will make your motors run the best they can. This is a great option for your scooter. Expect that these controllers are going to require additional re-engineering of other aspects of your scooter to accommodate them.
