Hello, this is my first post in this forum but this forum has been an asset to me for various ebike issues so first and foremost I'd like to thank all the experienced people here for help with problems I've had in the past. I'm fairly familiar with various aspects of brushless hub motors due too my own trial and error I've replaced a bms before and done other maintenance to other batteries but haven't done a lot of work to the motors themselves though I do feel confident in my abilities to repair an issue when I can determine a problem area and have tried searching for this issue too no avail
I have a 48v 1000w brushless hub motor on the rear wheel for my ebike and a 48v 20ah battery. "Both were the cheapest china made types i could find" I use this ebike for my daily commute too work. About 14 miles per trip twice a day. It's been a trooper and has worked great. Ive ridden it in the rain a few times without issue sense ive tried to do everything i could to weather proof it "just mentioning this too give the most info i can". The issue I'm having is this. I was on my way to work and the wheel partially locked up after almost a mile of riding I could spin the wheel but it was EXTREMELY difficult if I tried to spin the wheel by hand as soon as my hand left the wheel it stopped spinning. I thought it felt a little wobbly when I was riding it this morning but I just switched tired and tubes too a thinner width and it was really windy so I don't know if it was the wind and tires that made it seem weird. Regardless of if the battery was connected or not it was still very hard too turn it.From what I studied the main possible culprits were something being lodged between magnets or the bearings seizing. After taking apart the motor I found the bearings were great and there was nothing lodged between anything. But the magnets on the motor and the wheel itself seem to be sticking to one another not with anything other than there own magnetism nothing has come unglued and the hall sensors appear to be there and in working order however 3 of the little magnet sections on the outer rim of the ebike have a extremely small section of rust. The magnets are also just a tiny bit greasy. In the past I noticed a bit more resistance when riding the bike with no power I sprayed a little wd40 on where the bolts go on and I thought this solved the problem thought i hadnt felt this issue in weeks . But as I said today it messed up. The magnets on the outer rim seem to be sticking magnetically to the magnets on the motor itself when I went to put the motor back together when I was sliding the outer magnets/tire back together with the motor itself they REALLY slammed back together and when I go to try to spin the wheel I still had that extreme resistance and there is no battery connected to it. Also the spinning even with the resistance is clicky? Like it isnt a smooth moving it moves in little ticks. No audibke noise just tick tick tick is what it feels like "I know not a great description but its the best way i can put it into words". The ONLY thing I can think is that some of the wd40 got into the inside of the motor which caused the slight greasy Ness of the magnets and that's somehow causing the magnets to magnetize to each other moreso than usual. My next plan is to use a LITTLE bit of soap and water to remove the greasy Ness and ensure everything is bone dry and put everything back together. I'm at a complete loss it seems so strange any help anyone could give me would be greatly appreciated.
I have a 48v 1000w brushless hub motor on the rear wheel for my ebike and a 48v 20ah battery. "Both were the cheapest china made types i could find" I use this ebike for my daily commute too work. About 14 miles per trip twice a day. It's been a trooper and has worked great. Ive ridden it in the rain a few times without issue sense ive tried to do everything i could to weather proof it "just mentioning this too give the most info i can". The issue I'm having is this. I was on my way to work and the wheel partially locked up after almost a mile of riding I could spin the wheel but it was EXTREMELY difficult if I tried to spin the wheel by hand as soon as my hand left the wheel it stopped spinning. I thought it felt a little wobbly when I was riding it this morning but I just switched tired and tubes too a thinner width and it was really windy so I don't know if it was the wind and tires that made it seem weird. Regardless of if the battery was connected or not it was still very hard too turn it.From what I studied the main possible culprits were something being lodged between magnets or the bearings seizing. After taking apart the motor I found the bearings were great and there was nothing lodged between anything. But the magnets on the motor and the wheel itself seem to be sticking to one another not with anything other than there own magnetism nothing has come unglued and the hall sensors appear to be there and in working order however 3 of the little magnet sections on the outer rim of the ebike have a extremely small section of rust. The magnets are also just a tiny bit greasy. In the past I noticed a bit more resistance when riding the bike with no power I sprayed a little wd40 on where the bolts go on and I thought this solved the problem thought i hadnt felt this issue in weeks . But as I said today it messed up. The magnets on the outer rim seem to be sticking magnetically to the magnets on the motor itself when I went to put the motor back together when I was sliding the outer magnets/tire back together with the motor itself they REALLY slammed back together and when I go to try to spin the wheel I still had that extreme resistance and there is no battery connected to it. Also the spinning even with the resistance is clicky? Like it isnt a smooth moving it moves in little ticks. No audibke noise just tick tick tick is what it feels like "I know not a great description but its the best way i can put it into words". The ONLY thing I can think is that some of the wd40 got into the inside of the motor which caused the slight greasy Ness of the magnets and that's somehow causing the magnets to magnetize to each other moreso than usual. My next plan is to use a LITTLE bit of soap and water to remove the greasy Ness and ensure everything is bone dry and put everything back together. I'm at a complete loss it seems so strange any help anyone could give me would be greatly appreciated.