Hello everyone, I am doing my second intern at www.Solarbotics.com. I brought with me a friend, Rudy to work at SB. We are having a blast here. The weeks go by way to fast!
I just wanted to let you know where my project is going. I broke the motor of my scooter.
I tried to fix it, it did work… for 10 meters when it broke again.
What happen is that the motor lead short circuited and that made the motor heat up a lot!
The vibration of the scooter rolling around made the battery move, thus pulling on the motor driver and unconnected/shorting the motor leads!!
Here is a picture of the power consumption when I had the short circuit. Look at the current, 143Amp!!
This is the motor I might buy
Rated Power: 1580w
Cell count: 4~8 Lipoly
It seems to be a very good candidate for my new motor. My original motor is 380rpm/v, this mean I will go faster!
I will have to wait to got back home to machine a new shaft.
BTW, did I told you I crash with my scooter going 34km/h? I popped a wheelie at 34km/h. The throttle was too sensitive.
I coded a function that would smoothed the input read from the throttle.
On a other note, I am also thinking of getting a motor controller devboard from Microchip.
Since I have no experience in brushless motor controller, I guest I could start with this neat product.
I has a user interface on the computer so I can see different things about the motor in action.
The PCB looks like this:
Here is the block diagram:
Rudy is working on a Hybrid SAE formula car for is final engineering 2 years project.
He his working on the electric motor drive system and I send him links to lithium battery, MIT go kart, etc. He got really interested in motor driver.
He will help me in the fabrication of the motor controller.
I am also posting this from a desktop wordpress application call Blogjet. It works nicelly for the moment. I am on the free trial. Not sure if I will buy it since there are tons of free one out there. Adding pictures to post is really easy. I will try a posting with w.bloggar too.
After posting, I realise that when you click on a image, it link to the the wrong images. I remove the links. We will try again.