Recent content by Kevin Crawford

I disagree with your assessment of what would happen when losing one phase with a Delta-wired motor. Refer to the drawing below. If for example the L1 wire was disconnected, we couldn’t have current flow between L1 and L2 nor between L1 and L3. Current would only flow between L2 and L3 - one phase.

Thank you Amberwolf, that’s a much appreciated and thorough response. I did suspect the motor to controller connections first, and that seems to be fine. I haven’t thought of checking the wires right where they exit the axle. I did think of the hall sensors, but I had such a problem before and...

Hey everyone. I have a Q100H front hub motor on one of my bikes that is almost exclusively used for commuting, about 100 miles per week. I have used this build for many thousands of miles - maybe as many as 40,000! It's been rock solid and I'm very happy with it. I've almost always ran it, with...

Thanks. The tires are 700C x 32, and I go with max pressure whenever I top off. That's 65 PSI on my current winter studded tires, and something like 100 on 3-season tires. I figured it was important to have them high, considering the loads on them (though I use a front hub motor). But you're...

Hello all. My 2nd rear rack just failed. It's this one: http://www.ebikes.ca/shop/electric-bicycle-parts/battery-accessories/battrack-dd-ez.html. It failed at the rear welds, and also one tube snapped (?). This is the 2nd rack I've had fail on me this way in 3 years. They are aluminum. I don't...

No need to apologize! I certainly appreciate the help. After my last post, I decided to solder a resistor in series with the button. The throttle input impedance (between input and ground) on the CA was 110k-ohm, so I added a 5k-ohm resistor. This dropped the voltage input to 4.74 (as seen on...

Well, I've got the button, and I was able to get it to work. My only concern is that I can't set the throttle fault voltage higher than 4.99 V, and with the button pressed I get a 4.98 V input. Which means whenever I use the button I;m only .01 V away from faulting - way too close for my...

I did a little research before I built my wheel with the same motor and rim size. I think you'll be fine at 1X. I did 1X with triple butted spokes, which are 13G at the hub (which is what the holes are sized for), 14G at the threads, and 15G in the middle. It's worked fine so far. Does your rim...

Well, that's more like it! I think I finally have this configuration working properly now. I cut off both halves of the waterproof connector, and set up all of the wires on a terminal strip for testing. I didn't want to have another break in the cable, and I didn't want to go through the tedium...

Thanks. I'm going to experiment with wiring combos one more time. I like the quick-disconnect idea. Once I get that all set up running through all of the combinations shouldn't take long at all. I could even test it in real (on the street) conditions easily this way, to really nail down the...

neptronix: LOL, I was kind of expecting a response like that. With the amount of riding I do (100 miles per week), and in the conditions I ride in, I just don't see my battery pack lasting long enough to make using this motor worthwhile. I squeaked out 2 years averaging about 8A before. At...

I know I'm late here, but thanks, everyone! That horn button is exactly what I'm looking for. I was wondering whether it was momentary or toggle-type, but I think either would work just fine with my CA, since it locks in the setting after a set (programmable) amount of time.

Hey everyone: After experimenting with swapping wires around, I was able to get the motor running in the correct direction. It is "working", but the trouble is, the power is sorely lacking. There is some assist, but it's so little that it doesn't seem worthwhile to even use vs. just hopping on...

No, a button to activate full throttle input.

Hello everyone, I'm finishing up my 2nd ebike conversion, and want to do the throttle differently this time. I use a Cycle Analyst with cruise control feature, and I almost always just set the throttle to full for 2 seconds until cruise kicks in, and then let it go. I don't really need to use...