Search found 156 matches

by kiwifiat
Apr 08 2014 5:53pm
Forum: Battery Technology
Topic: Arduino cell monitor
Replies: 30
Views: 6141

Re: Arduino cell monitor

The voltage divider steps down roughly a 60 volt input to 5 volts which is safe for the ardunio's 5v analog inputs, the 1024 level input i expect to get (60 / 1024) 0.058 steps in reading accuracy i can expect double this as i have error subtracted from error in the calculations for the final value...
by kiwifiat
Apr 04 2014 1:07am
Forum: Motor Technology
Topic: low inductance output stage contruction
Replies: 157
Views: 22155

Re: low inductance output stage contruction

I have had plans for something along these lines for years and in have posts explain how I will do it but I need to get finished my power stage first then I will parallel them up. Most likely it will be 4 FETs in parallel and then multiple power stages parallel to either 3 6 9 or any multiple of 3 ...
by kiwifiat
Dec 18 2013 10:26pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG, 1000W 48V BB-drive, $400
Replies: 3517
Views: 528353

Re: GNG, 1000W 48V BB-drive, $400

I got my three big block motors from Mister Tao. One has cosmetic damage and another one is trashed. They put like one sheet of crappy styrofoam that turned to powder in the box with three 11 pound motors. The steel helical gear was just the tool for mangling the aluminum case fins. I am bummed. Ri...
by kiwifiat
Dec 01 2013 4:23pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG, 1000W 48V BB-drive, $400
Replies: 3517
Views: 528353

Re: GNG, 1000W 48V BB-drive, $400

I will be cutting and machining the motor spindles for the four big blocks that I have if you want to send yours down. It has to be annealed, cut, machined and then rehardened. Easier and more economical to do in batches. I also have six small block spindles that I'm going to rework. Several of tho...
by kiwifiat
Nov 30 2013 7:25pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG, 1000W 48V BB-drive, $400
Replies: 3517
Views: 528353

Re: GNG, 1000W 48V BB-drive, $400

One setback today. I just saw that Mister Tao had "refunded" my order for 10 GNG spec motors. I PMed them asking for an explanation but have not heard back. There are great deals to be had in China but the waters are treacherous and deep. My order for three 404 big blocks is still processing. ! Tha...
by kiwifiat
May 01 2013 8:33pm
Forum: Motor Technology
Topic: Field Oriented Control using dsPic33
Replies: 173
Views: 34030

Re: Field Oriented Control using dsPIC33

Thanks to Burtie a quality blank PCB turned up in my mail box today via Royal Mail. I will be building it up over the coming months after the components are to hand and will start a new thread when I commence.