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
18468 times

More from scolton

Imprecise Aggressive Maneuvers for Remote Control Quadrobots (a.k.a. Twitch, Jr.)

Imprecise Aggressive Maneuvers for ...

Added 4 years ago | 00:01:00 | 13087 views

B.W.D. Scooter Test Drive #2

B.W.D. Scooter Test Drive #2

Added 5 years ago | 00:02:29 | 27225 views

New Toy

New Toy

Added almost 7 years ago | 00:00:54 | 13272 views

Cap Kart 2.0: 8/21/2010 Test Drive

Cap Kart 2.0: 8/21/2010 Test Drive

Added 4 years ago | 00:02:44 | 11597 views

FRC Championship - Team 97 - Practice Match

FRC Championship - Team 97 - Practi...

Added over 7 years ago | 00:02:23 | 12686 views

FIRST Robot - Week 6

FIRST Robot - Week 6

Added over 6 years ago | 00:00:58 | 11328 views