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
18576 times

More from scolton

FIRST Robot - Ready to Ship

FIRST Robot - Ready to Ship

Added over 6 years ago | 00:00:54 | 18647 views

FRC Championship - Team 97 - Practice Match

FRC Championship - Team 97 - Practi...

Added over 7 years ago | 00:02:23 | 12760 views

FIRST Robot - Week 3

FIRST Robot - Week 3

Added over 6 years ago | 00:00:46 | 12995 views

PCB Quadrotor: Strobe Vibration Visualization

PCB Quadrotor: Strobe Vibration Vis...

Added over 2 years ago | 00:01:59 | 3653 views

More Electric Go-Kart Testing

More Electric Go-Kart Testing

Added 6 years ago | 00:02:30 | 23051 views

Design Tips: To-Do List

Design Tips: To-Do List

Added almost 6 years ago | 00:02:24 | 11436 views