Electric vehicle controllers and control systems

OK, here's one for the techies:

What functions would the ideal large scooter or motorbike controller have? If you could say to Alltrax or Curtis "build me this" then what features would it have?

Here's my start:

Is there any problems with having your controller a inch away from the motor?
Its a Logitec controller and a Eteck.

Hi all, I'm new to the forum. I sponsor a solar bike club at a highschool and need some advice. We have a 3-wheeled car similar to a recumbent bike. I'm thinking of putting a Crystalyte Pheonix brushless hub motor on it. I was wondering if there were other motor controllers that would work on this motor that would allow regenerative braking?

Thank you all for your help

Ch

I was inquiring to Kelly Controls about a controller for my project, and they informed me that the 84V controller not available, and the 76V is now the standard.

I explained that 84 Volts was the design voltage of my system, and Kelly responded by saying I could special order an 84 V , or order a their new 120 Volt.

Just an FYI incase anyone is looking to go 96 volts or higher.

Thanks.

Mike K.

Back again in my attempt to gain some useful knowledge.
My basic question is how do I calculate if a controller will be sufficient for my use.
Specifically I am planning on running 24v through 2 350w motors in series (I'm assuming this is equivalent to 1 700w motor. Will a 24v 40a controller work for this application.
Thanks
-hendu

Hello, I have a problem with an E-Star 36 volt gokart.
When the throttle is not engaged( pot is at approximately zero) the motor keeps turning at a low rpm. Maybe a couple of MPH. The throttle pot/speed controller works fine on acceleration and deceleration. As soon as I turn on the power the motor engages.
The cart has a Kango speed controller.
A new 5K Vishay spectrol pot digi-key p/n SP657-5.0K-ND.
Batterys are fresh and charged Power Sonics.

A little Brushless Motor Tech 101:

According to Richard Fechter's schematics and accompanying description of the operation of a Crystalite controller, the FET's that drive the coils rapidly alternate between + and - voltage during operation:

http://endless-sphere.com/forums/viewtopic.php?t=764&highlight=fechter+reengineer

Is this due to the phenomemon of attracting the permanent magnets as they approach the coils, and repulsing them after they pass?

For the Honda Elite project I had a brilliant idea (or brain fart) to try out the Kelly Controls controller. This is the same Honda Elite project which Alias mentioned.. as she is participating. The bike has a 48v "4000 watt" motor I bought from Craig (deafscooter) a year ago and the low end Kelly controller is 200 amp. So, ah, this controller will do double what Craig claimed is the capacity of the motor. Ought to make for a good test.

The controller just arrived and I thought to write up initial impressions - it hasn't been installed, just looking over the manual etc. I think someone else bought one of these controllers, right?

The box is in the same style as the curtis controllers, but a silvery color (aluminum) rather than their preferred basic black. The box is very sturdy and appears to be watertight. A welcome departure from the Curtis style is the large number of connectors. The other controller makers, Curtis, Alltrax and Logisystems, 4QD, all use a minimalized number of connectors.

Kelly has separate connections for power, reverse, throttle, ground, three different switch inputs, a horn, both resistive and hall effect throttle, serial port, etc.

The M-/B+/B- connectors are large spade posts to which you screw cables, as is typical. But the hole for inserting the screw is pretty narrow.

They include in the box high value resistors and diodes as per the wiring diagram AND they include a serial port cable and gender changer. Very complete on this end. The wiring diagram is very detailed and thorough unlike the sketchy (and incorrect) diagram which shipped with the last alltrax controller I bought.

An interesting detail -- the unit I bought is rated for 200A. Turns out that's the "3 minute" limit. Their "continuous" rating is 120A.

It supports running in reverse. Simply connect the 'reverse' to a switch, flip the switch, and the motor will run in reverse. Not too interesting for a two-wheeler but 3-4 wheelers would find this very helpful as otherwise running in reverse involves a "reversing contactor" or a reverse/forward switch external to the controller.

It appears to have regenerative braking. However they warn that regenerative braking is not enough, and that you should also have mechanical braking. Looking closely at their web site, they offer a PM controller or a PM controller with regeneration. The serial number has this coded, and the one I bought does not have regeneration.

I have an etek brushless motor with 3 posts labled V - W - U

There are also 6 controller wires: 2 black, white, green, blue, red.

I want to connect the etek to an alltrax 4834.

0-5k pot accellerator

48v 10 amp hour battery

I cant find the information on the internets, so im lost.

Any help or links would be apperciated.

Glenn

I have a 2004 Panterra Retro scooter with a 750W brushless motor. Several problems have been occurring intermittently that I would like some help hopefully fixing. The first is that the electronic throttle appears to get stuck wide-open. This happens most frequently when the scooter has been sitting outside in chilly conditions (usually less 40 degrees F.) The first time that it happened I was standing beside the scooter and turned the key on nearly running myself over.