There is a lot of information in this site: this is an expanded index which is available from the home page, so to get back here, click on 'Home' from any page then go to the 'Site Map' link at the top of the Home Page text. There are also Map buttons on the Section indexes.
There is so much information here that it's difficult to index it in a way that suits everyone. If you know it's here - somewhere, but can't find it, use the Search button (top and bottom of every page).
This is one of several linked 4QD sites WWW Sites
This site index is in several sections. Some (entries in bold type) have separate index pages.
If you are not sure how to select a motor and a controller for your project start in this section.
motor speed controller information sheets:
Special Products
These models are of restricted availablity so are not normally stock items. They may be subject therefore to delays in supply or minimum quantity restrictions.
Accessories
Lots of switches, pots, connectors etc for battery control applications.
You may access our price list from here if you know the order code of the item you want. Otherwise it is generally better accessed from individual product data sheets.
ZIP Files
To help off-line browsing, certain parts of the site are available as zipped archives containing the whole section.
Typically a one-off project: few get made commercially!
Electric Vehicles
Some of the available information is on this site, but there's lots on the www generally. We have a page of addresses and some links to other sites:
This is a large text, with not many graphics (all small) which gives much background information on low voltage motor control. It is split into two files of about 60KBytes each. Recommended reading if you are trying to find out about the subject!