fizzit
10 kW
Hey guys,
I am helping a friend rebuild an electric scooter. He got it from someone for free, because apparently they were riding it one day and it just "stopped working". It sat for a long time and the lead batteries died, so we recently set to work replacing them with a large quantity of Turnigy LiPo. Today, we hooked up some of the batteries for a test run and were disappointed to see that the rear wheel was spinning very slowly and making a strange noise.
The scooter is an Evader scooter. Apparently they were made for a few years in Bellevue, WA. It has a 48V 1000W brushed hub motor and controller that I haven't been able to find any information about on the internet.
Here's a video of the noise that I'm talking about. The throttle is being held wide open, and we were measuring about 20A and 46V from the battery. On the motor output of the controller, however, there was only about 16V DC. We're not sure if this is because the controller is limiting the current, or because there is some problem with the controller.
[youtube]9p156ALXvmU[/youtube]
The motor spins freely when you turn it by hand, with little cogging, so it doesn't seem likely that it's a bad bearing.
Any tips or ideas would be appreciated. Thanks!
I am helping a friend rebuild an electric scooter. He got it from someone for free, because apparently they were riding it one day and it just "stopped working". It sat for a long time and the lead batteries died, so we recently set to work replacing them with a large quantity of Turnigy LiPo. Today, we hooked up some of the batteries for a test run and were disappointed to see that the rear wheel was spinning very slowly and making a strange noise.
The scooter is an Evader scooter. Apparently they were made for a few years in Bellevue, WA. It has a 48V 1000W brushed hub motor and controller that I haven't been able to find any information about on the internet.
Here's a video of the noise that I'm talking about. The throttle is being held wide open, and we were measuring about 20A and 46V from the battery. On the motor output of the controller, however, there was only about 16V DC. We're not sure if this is because the controller is limiting the current, or because there is some problem with the controller.
[youtube]9p156ALXvmU[/youtube]
The motor spins freely when you turn it by hand, with little cogging, so it doesn't seem likely that it's a bad bearing.
Any tips or ideas would be appreciated. Thanks!