Changing 48V to 36V
- Thread starter polypop
- Start date
wturber
1 MW
polypop said:
I don't know the specifics of your model controller, so this is a fairly generic answer.
Assuming that the controller wasn't designed to optionally run at 36 volts, you can either buy a new 36 volt controller, or you can use a boost converter as I am doing.
If your other electronics (display if you have one) are happy with running from a 36 volt controller, then the simplest and cleanest solution is the new controller. But you will have a bit of a top speed penalty if you go that route.
Running a boost converter can work without needing to alter any of your other equipment. The boost converter I'm using will pull about 1000 watts from the battery. If you need more than that, then there is only one commonly available boost converter that might work - though I don't know of anyone who has tried it. The boost convert allows all the 48 volts stuff to work as if there were a 48 volt battery. I set mine to output 54 volts. So the system always thinks it has a full battery. The negatives are that the system can no longer tell you actual batter voltage or estimate range since it always sees about the same voltage. You can't run regen back through a boost converter. You lose about 5% efficiency with it. You may have to fiddle with its settngs (max current, min voltage, etc) a bit to get it working smoothly with your system. There is extra wiring, more connections, and one more electronic item in the loop that might fail. I've lost one boost converter in about 8500 miles of ebiking.
Don't use a boost converter to power your motor like the first reply suggests. That is inefficient and will lose you range, among other things.
The issue you would have with putting in a 36v battery is you need to reprogram the lower voltage limit where the controller stops working to protect your battery. If there isn't one of those you'll be good to go.
Make sure you're still monitoring the battery by some means! Don't charge or discharge too far.
The issue you would have with putting in a 36v battery is you need to reprogram the lower voltage limit where the controller stops working to protect your battery. If there isn't one of those you'll be good to go.
Make sure you're still monitoring the battery by some means! Don't charge or discharge too far.
docw009
10 MW
There is a long long thread about the TSDZ2 here.
https://endless-sphere.com/forums/viewtopic.php?f=28&t=79788
In it, they talk about reflashing the motor firmware so it will run on 36V. You have to buy a couple of little electronic clip-ons, I was going to do that, but I never did.
https://endless-sphere.com/forums/viewtopic.php?f=28&t=79788
In it, they talk about reflashing the motor firmware so it will run on 36V. You have to buy a couple of little electronic clip-ons, I was going to do that, but I never did.
