Massachusetts Institute of Technology
Sign in

Cap Kart Speed Controller Testing

Ramp input testing of the custom speed controller we are developing for the cap kart. (http://web.mit.edu/first/kart)

Speed control is done by rapidly switching voltage on to and off of the motor coils. In this video, you can hear the speed controller switching frequency as it ramps up and down (high-pitched whine). It is most noticeable at about half speed.

Our speed controller is entirely custom, built in-house. Testing here is with very little load, just the inertia of the rear axle. However, since no heating of the power transistors used to switch was seen, we will be stepping up to load testing very soon.

We hope to be able to handle a maximum current of 300A. The total component cost to build our speed controller will be less than $100 and plans will be made available on our web site if (when) it has fully proven itself.

Comments (1)

Can’t wait to get my hand on the plans!

Posted over 5 years by ElvenChild

You need to log in, in order to post comments.

scolton

scolton

Category: Engineering | Updated 6 years ago

Created
August 07, 2008 19:27
Category
Tags
License
All Rights Reserved (What is this?)
Additional Files


Viewed
20240 times

More from scolton

D.I.Y. Segway progress

D.I.Y. Segway progress

Added 9 years ago | 00:01:21 | 20973 views

Custom Brushless Motor Controller Testing

Custom Brushless Motor Controller T...

Added 7 years ago | 00:01:09 | 16432 views

Rookie vs. the RC Car (...in slow motion.)

Rookie vs. the RC Car (...in slow m...

Added over 6 years ago | 00:00:43 | 14244 views

Cap Kart Summer '10 Rebuild - Rear Axle Spin-Up

Cap Kart Summer '10 Rebuild - Rear ...

Added 6 years ago | 00:00:28 | 14869 views

Something you CAN ride.

Something you CAN ride.

Added 9 years ago | 00:01:58 | 12719 views

FIRST Robot - Practice Match

FIRST Robot - Practice Match

Added over 8 years ago | 00:02:59 | 15142 views