Search found 9 matches

by CharlySierraGolf
Mar 08 2019 9:09pm
Forum: Battery Technology
Topic: Welding busbars to Nickel Strip?
Replies: 2
Views: 206

Welding busbars to Nickel Strip?

Hi,

Does anyone knows how to weld busbars to nickel strip?

The battery is a 14S20P (300A). The parallel connections will be with nickel strip and i want to make the series connection with the bus bars.

Any advice on bus bat type, material, welding technique?

Thanks in advance
by CharlySierraGolf
Feb 19 2019 9:19pm
Forum: Battery Technology
Topic: Sunkko 737G Transformer Rewiring
Replies: 6
Views: 271

Re: Sunkko 737G Transformer Rewiring

Thank you very much!

This model powers the main board directly with 220v or 110v, no secondary winding besides the one used for spot welding.

Thanks again!
by CharlySierraGolf
Feb 17 2019 1:32am
Forum: Battery Technology
Topic: Sunkko 737G Transformer Rewiring
Replies: 6
Views: 271

Re: Sunkko 737G Transformer Rewiring

Hi, I've received the sunkko 709 110v in a 220v country. It burned when I plugged into the wall. Your modification on the transformer will change the voltage of the spot weld only, the main board will still be a 220v feeded with 110v. In my case it seems that the 110v board didn't handled the 220v. ...
by CharlySierraGolf
Feb 06 2019 10:05pm
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 14
Views: 2431

Re: Converting a MONI motor glider to electric

Good decision to make it work with a regular propeller
Where you will place the battery pack?

My project is a kit for making almost any sailplane self launcher. In my prototype the batteries will go on the wings, near the leading edge. So i need a custom made battery pack that i will build myself.
by CharlySierraGolf
Feb 05 2019 9:19pm
Forum: Electric Aircraft
Topic: Converting a MONI motor glider to electric
Replies: 14
Views: 2431

Re: Converting a MONI motor glider to electric

Nice project! I would stick to low voltages, there is more options on controllers and motors. You already have the feathering propeller? Yes, it sucks to have 300amps at full power, but it is very doable. A 28S30P of samsung 25R would be a nice and safe pack. You can draw 60kW peak with cell within ...
by CharlySierraGolf
Jan 26 2019 11:06pm
Forum: Motor Technology
Topic: Controller for a 30kW and 4500rpm motor
Replies: 4
Views: 538

Re: Controller for a 30kW and 4500rpm motor

Sorry,

I was looking for a more general answer of options at that power output and then see the specs by my own.

Its a BLDC with 40 magnets, 36 slots, 4 windings per slot, Delta configuration.

Other features? The more programable the best.

Regards
by CharlySierraGolf
Jan 26 2019 7:45pm
Forum: Motor Technology
Topic: Controller for a 30kW and 4500rpm motor
Replies: 4
Views: 538

Controller for a 30kW and 4500rpm motor

Hello,

Which controller you recommend for a 30kW 40 magnets and 4500rpm motor?

We had a problem with the mgm compro that we bought and the after sales of that company are a nightmare.

Regards
by CharlySierraGolf
Nov 13 2018 7:13pm
Forum: Items Wanted
Topic: Custom Battery Pack Assemblers / USA / low volume
Replies: 4
Views: 573

Re: Custom Battery Pack Assemblers / USA / low volume

I will send private message to each of you.
by CharlySierraGolf
Nov 04 2018 10:34am
Forum: Items Wanted
Topic: Custom Battery Pack Assemblers / USA / low volume
Replies: 4
Views: 573

Custom Battery Pack Assemblers / USA / low volume

Hello,

I need advice/orientation/recommendation of companies or expert in the US who can build me some 13S20P battery packs.


I've written emails to some companies but they are reluctant to low volume.

Thanks!


Emir