Recent content by mikew8760

Thanks for the response, every little helps as they say! From what you say it would seem that my original assumption was correct, that is, the two wire connector with 5v and Gnd would simply need to be shorted together, by the brake lever switch, to cut power to the motor. But this doesn't...

Hi, I have a Chinese Noname 36V, 250W brushless ebike controller which works fine. I have now decided to connect brake levers with switches in order to implement the braking function on the controller. Like many controllers mine has "Brake High" and "Brake Low" connectors. I only recently...

After a fairly long break due to weather and other interruptions, I finally got to try out the motor with the new clutch flitted. But, as I feared, it has made absolutely no difference; the staccato rattle is still there under some load conditions. Sadly, it's the result I was expecting, as I...

Thanks Mr Woosh. Attached is a photo of the "working" part of the possibly defective clutch (with the grease cleaned out). As you can see (and no doubt are quite aware) this one has 3 rollers. Close inspection doesn't show any uneven wear, flat spots, surface pitting etc of any part, so maybe...

Thanks to all who have added their 2 cents worth to this thread. I have obtained a clutch from the greenbike people and will fit it when time permits. However, my curiosity forced me to examine the old one. I expected to find worn rollers, broken springs and such-like, but I was disappointed...

From above, I suspected the Power Circle related only to the rim. Also, I have another controller I may try out before attacking the hub. A couple of photos for perusal; one is of the Noname hub and second shows the clutch and gears as I was testing it. Any clues, anyone?

Thanks, but I mis-read the label on the wheel rim; it's actually Power Circle, but no further clues...

Many thanks to all who have given sage advice on my little problem. As a result, and despite a few red herrings, I believe the symptoms I'm experiencing are of a mechanical rather than electrical nature. I've found a couple of entries on the web which describe the result of failure of the...

Thanks woosh, but the 'clutch' is not something I had thought would misbehave intermittently under different load conditions. But, by clutch I assume you mean the mechanism to which the 3 planet gears are attached? I'm thinking it's something like a freewheel, and if badly worn or something...

Many thanks for the advice from you all, but I'm no further forward. This morning I soldered the joints between the motor phase wires and the controller, just in case the connectors were 'iffy' and the cause of the problem. This has not made any difference! If the idea of loose rotor magnets...

Thanks for the response. I should have said that I have checked and rechecked the usual suspects, and even run it with the controller in Hall-less mode, but makes no difference. My suspicions are partly based on my observation that when I first assembled the bike, I had a look inside the motor...

Hi, The 'noname' 250W bldc motor on my bike seems to have developed an odd fault. Occasionally when under load it loses power and makes a grinding noise for a couple of seconds. My suspicion is that some of the magnets have become loose in some way. I have yet to dismantle it to see if my idea...

What sensors did you get? What's the RS part number? You may have got ones that are called 'ratiometric'; these give an output voltage proportional to the magnetic field strength. (These are used in throttle controls.) The ones for phase control must be 'digital' or similar description. If...

Pondering your problem with the bike, if it were me I would want to make 100% sure it was a faulty Hall sensor before attacking the hub motor. It's just possible that the input circuitry in the controller for the sensor has been fried. The simplest way to establish which is the culprit is to...

For what it's worth, I too have put together a variety of parts for my homebrew e-bike from eBay and have some experience of the electronics involved. As you suspect, it is unlikely that the MOSFET's have failed. But the result you've obtained from the 'green' Hall sensor strongly suggests it...