AEVA Forums

A company in Turkey was telling me that whenever they buy motor controllers from Golden Motor, Golden Motor sends fewer than what was ordered, and they take a very long time to ship.

I was mainly concerned with ripple current. The EVTech list had also told me that basically the more capacitance and ripple current the better. I went with the approach of getting as much ripple current capability as possible in the space I had in order to keep the caps cool. I didn't do any officia...

Within the space right now, the sixteen 820uF caps I'm using take about 3-4 times longer to precharge than the Curtis 1231c according to Joe. He had to change to a smaller value precharge resistor. There is also another larger cap that's just about 10mm taller but same diameter that we could use wit...

I emailed them and asked for 10 samples. We'll see what happens. They also have a new 250v mosfet with an RdsOn of 12.9 mOhms I think. 500v diodes are pretty easy to find, so I think it would be basically the same price for making a 200v controller instead of a 144v. Well, maybe an extra $20 or $30....

FANCY MOSFETS! Check out those mosfets! They won "best in show" or whatever at the 2009 mosfet fair or something like that. I was reading about that. Digikey has them for $7 each in quantities of 10, but are out of stock until December. Now, if we could get synchronous rectification working, or som...

Hey Squiggles! The intrinsic diodes in the mosfets don't help. The freewheel diodes conduct from M- to B+, whereas the mosfet intrisic diodes go from B- to M-. Isn't that sad!?

Hello! I think D6 protects against spikes. This is the datasheet: http://www.diodes.com/datasheets/ds21502.pdf Also, see R17, a 1k pulldown to make sure the driver output is pulled low. I learned the hard way to make sure to have one of those. The bike controller I made first didn't have that, and t...