Massachusetts Institute of Technology
Sign in | Create Account

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 3 years by ElvenChild

You need to log in, in order to post comments. If you don’t have an account yet, sign up now!

scolton

scolton

Category: Engineering | Updated over 2 years ago

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


Viewed
18389 times

More from scolton

RC Car Tire Spin, 600FPS

RC Car Tire Spin, 600FPS

Added over 4 years ago | 00:00:10 | 17759 views

Holonomic Drive

Holonomic Drive

Added over 7 years ago | 00:02:08 | 17904 views

More Homemade Segway Fun (2)

More Homemade Segway Fun (2)

Added almost 7 years ago | 00:00:10 | 11288 views

2.007 Final Round - 2008

2.007 Final Round - 2008

Added 6 years ago | 00:01:42 | 7543 views

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

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

Added over 4 years ago | 00:00:43 | 13075 views

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

Cap Kart Summer '10 Rebuild - Rear ...

Added almost 4 years ago | 00:00:29 | 13530 views