Electric vehicle controllers and control systems

Electric Bike Hub Motor - How to Replace a Hall-effect Sensor
by Jeremy.Nashon Jul 11, 2007in ride & tech

Repost permission granted by Jeremy, thanks from the V is for Voltage Community members and guest for sharing.

Hi All,

I would like to increase the voltage on my hg-1000 brushless geared hub motor which is rated 350w.

It is quit big in diameter 22cm and 10cm wide and almost never gets warm unless I take both sons on a wagon behind
:) ( extra 50kg).

Has any body tried to use 48v instead of the 36v using the controller as is, which is 36v and the fuse is 30A?

I have a Marketeer Golf Cart (trike from the late 50's early 60's) that is very "Old School" in the motor control dept.

The Motor is a 4 1/2HP Gen Electric series wound motor that has 2 heater type resistive elements that limit the current to the field windings of the motor as the accelerator control is stepped on.

The Forward Reverse switch is a pair of 1/4" thick copper bars that have a 3rd bar that pivots such that the +ve and -ve lines are reversed.

I just got new batterys for my emax and I'm redoing the arrangement as is recommended, so I needed to put new wiring in. I went out and got some #6 wire and some ring terminals to match. However, I went to 4 places it seems that no hardware stores sell crimpers that will work on this size. Also people have been telling me I should just use pliers, but this seems like it would not make a good connection. What is a good technique for making high power connections? Is there anything that doesn't involve a super expensive crimper?

I'm wondering how exactly this works. What does a contactor do? What's the advantage? I'm building a new project built around a Mars motor and Sevcon controller.

T.

Does anyone have any experience, good or bad with the Alltrax controller at 60 volts?
If I remember right people where experiencing problems with them at 72 volts.

Thanks
Matt

Hello,

i have a Huari scooter (same design as Emax) and the speed seems limited to about 22mph...
The motor is a 750W WDF and on their website, its speed is "selectionable 35km/h or 50km/h".
So i'm wondering how the speed could be limited ?

I am currently running a crystalyte motor controller on 66v and have noticed on my drain brain its hitting 25 amps max and is rated for 20.I'm guessing that its not current limiting and want to know is there a big risk of blowing fets? Have people blowin these pretty easy before? The heat sink doesn't really get that hot.

To answer my own question...and check to see if I understand...i have included the following functions:

1. start the motor
2. reverse the direction of the motor - like a reverse gear
3. do regenerative braking
4. regulate the speed of the motor

Is this correct? Are there any others? Is it possible to get a dual voltage controller, i.e. has a switch so that you can use 24 volts and then switch to 36 volts in the need arises?

I've been riding my 48V 700W e-Vespa-clone scoot, "Hummer," for about a year. Since I re-glued the stator magnets in the brush-type motor, it has had a pronounced buzzing "cogging" when not under power: hence the name. You can see it at:

http://www.austinev.org/evalbum/822

Now a strange new problem has arisen.