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. (

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 5 years by ElvenChild

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



Category: Engineering | Updated over 5 years ago

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

19868 times

More from scolton

New Toy

New Toy

Added over 8 years ago | 00:00:53 | 14454 views

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

Cap Kart Summer '10 Rebuild - Rear ...

Added over 5 years ago | 00:00:28 | 14506 views

More Electric Go-Kart Testing

More Electric Go-Kart Testing

Added over 7 years ago | 00:02:30 | 24344 views

FIRST Robot - Practice Match

FIRST Robot - Practice Match

Added 8 years ago | 00:02:59 | 14774 views

Design Tips: Priorities

Design Tips: Priorities

Added over 7 years ago | 00:02:24 | 20739 views

2.009: Coffee Bean Sorter - Testing 2 (Defects)

2.009: Coffee Bean Sorter - Testing...

Added over 8 years ago | 00:01:36 | 11050 views