[ausev] Dynasty governor, was: WSJ article on open source

[Mark Farver]

> On Wed, 2007-03-28 at 15:41 -0500, Benjamin Viges wrote:
>   
>> Hello Everbody,
>>  Does anyone know how I can take the speed govenor off of a Dynasty EV?
>>
>>                                                 Peace, Hart Viges
>>     

I believe I posted an answer to the question the last time you asked. 

There is no public documentation about these vehicles.  Without knowing 
how they are constructed, or what components the vehicle uses we cannot 
offer any advice.  I suggest you look "under the hood" and get the model 
numbers of the motor and speed controller and how many and of what type 
of batteries that are installed.  If you cannot do this yourself one of 
our members may be willing to stop by and take a look at the vehicle.

Some NEVs have speed limiters, but most are simply limited by available 
horsepower.  The description you gave in your first post was that the 
vehicle lagged climbing hills, a sign that it is underpowered, not 
limited.  A speed limiter would be noticed on flat surfaces, when the 
vehicle reaches the limit speed and simply fails to go any faster.

If the vehicle is power limited there are some very easy, but warranty 
voiding changes you can make.  Installing a larger controller would be 
the first thing I would do.  Alltrax AXE 400amp golf cart controllers 
are available on ebay for a few hundred dollars.  A larger controller 
will supply bigger amps to the motor, giving it more torque and better 
hill climbing abilities.   However, stuffing more amps into a motor that 
is not designed for it may destroy the motor or the batteries prematurely.

A higher current controller will give you better torque and 
acceleration, but the top speed may still be limited by the battery 
voltage.  Adding more batteries may be required. 


Mark Farver