Recent content by bose

Kepler, have you looked into using a mouldable plastic for using as a support against your frame? I.e. plastic pellets that becomes clay like in 60degC (might be an issue in Oz?) and could then be pushed around the part of the swingarm you want to use as attachment point for your drive. Then...

I have one laying around in a wide 20” rim in Sweden. I’ll give it away for free as long as shipping gets paid.

Why not go with a tool battery? The Bosch 18V 6Ah - easy fast charging with minimum hassle and danger. Makita also has premium batteries for their 18V tools. 3D print an interface board and Bob’s your uncle. If you need bigger range - bring an extra battery in a backpack or saddle bag and...

Well.. my freewheeling comment was to the system design itself - not to adding a torque sensor. However - all functionality needed for implementing the control side can be programmed in the VESC.

Inspiring build - just the right way to go - assist with electrical freewheeling! Regarding a torque sensing bottombracket - it will not be possible for the torque sensor to differentiate between your leg input vs the input from the motor. The torque sensing needs to be done in the pedal arms...

Check out this http://endless-sphere.com/forums/viewforum.php?f=35 part of endless sphere for the VESC open source controller. The VESC have absolutely everything and anything you need for a friction drive. There are endless possibilities to choose ramping, current/power control etc. There...

The photos suggests that you have connected the negative side of the capacitor to plus (red). Also, try to keep the leads as short as possible. I.e. Try to mount the capacitor closer to the cables.

Posted this earlier in an other thread. What do you think about implementing this, Vedder?

VESC consists of: MOSFETs MCU Use motor coils as inductor or connect external inductor together with input power cable. Some reconnections will be necessary when charging but with smart designing of cables it shouldn't be an issue. See also the Russian adappto (spelling?) e-bike controller...

Do you really mean 0.5Ohm and not milli Ohm? If your shunt is on 0.5 Ohm a 50A current will yield a 25V voltage drop over the shunt that will seriously affect your performance.

Check the skateboard / stand up scooter forum for the VESC. Should be perfect for the task. You could write an application for whatever throttle ramp you would wish for that makes it activate smoothly. No need for any external arduino/whatever, all code would run in the ESC.

I am not experienced enought in analog design to give any advice but I am sure that Vedder has set the 12s as a realistic limit. You can always try it out and be sure to log all voltages with the bldc tool. Optionally you could look at spikes on the phase lines in different load conditions with...

Happy to help. 60V is maximum rating and you should always give an overhead since it is an inductive load you are connecting that will be able to generate voltage spikes.

The FET driver that is used supports 60V maximum. If you have a read through at http://www.vedder.se there are lots of info. FET driver data sheet http://www.ti.com/product/drv8302

Have anyone tried leather on the can?