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3 Nov 2009

Configuring the Alltrax AXE 7245

So, I've had this big paper weight on my desk for about a month now. I was hoping that after I cleaned out the basement one of the "computer boxes o' junk," that there would be a serial to USB (9-pin RS 232 to USB) so I could play around with the Alltrax AXE 7245 settings, but nothing was found. I have one on order and hope to receive it soon!

The Controller Pro software looks pretty basic and extremely user-friendly. But, the settings will be more than enough for me. You can adjust the General settings, Throttle response and even record the performance. The Monitor option sounds cool as it will be perfect for my wife's netbook.

Here are the options available to the AXE (also has DCX optioins listed) controllers.

HPD (ON-OFF)
High Pedal Disable

AXE and DCX Models Only - Prevent motor controller from
providing power if throttle is applied prior to Key Switch Turned on

PLUG BRAKE
(ON-OFF)

AXE "P" and DCX models ONLY with A2 terminal lug.  Provides
Plug Braking proportional to throttle position reaching ful
"Plugging" (Dynamic Motor Braking) when throttle below 25%.

TURBO (ON-OFF)

Provides higher seed when not in current limit and throttle is at
100%

1/2 SPEED REVERSE

ACXE and DCX Models Only - Limits vehicle speed in reverse
based on 50% of forward "Top Speed" setting.

MAX OUTPUT
CURRENT (0-100%)

0-100% adjustment limits max current supplied to motor.  Used
to limit power. (The 400A controller set to 50%=200Amp max)

UNDER VOLTAGE

Sets the under voltage where the unit limits power and
eventually shuts off.  Prevents battery damage

OVER VOLTAGE

Sets the over voltage shutoff for the controller during excessive
regen or overcharging to prevent damage

THROTTLE UP RATE
(1-15, Default 4)

Determines the rate of controller output power based on an
INCREASE in throttle input.  Setting 1=slow, 15=Fast.

THROTTLE DOWN
RATE
(1-15 Default 4)

Determines the rate of controller output power based on an
DECREASE in throttle input. Setting 1=slow, 15=Fast

BRAKE CURRENT
(0-100%)

>AXE "P" Models - Adjusts the amount of Plug Brake Current as
a percentage of 100A of brake current

>DCX Models - Regeneration Feature is a percentage of possible
current available

TOP SPEED

Sets the top speed as a percentage of top-speed

Once my new cable arrives I will screen capture some of the configuration pages.

3 November, 2009 at 16:08 by voltswagen

Posted in Electric Car | No Comments »

1 Oct 2009

Alltrax AXE 7245 Controller

Got the controller for the Bug today. It is an Alltrax AXE 7245 controller. 24-72 Volts, 450 amps. Just need to get this thing DONE. Parts are coming in, excitement is brewing. Photo... I need to find the SD card for the camera (think the kids have it in the Wii). If you don't know about Alltrax you can find their website here.

If you want to know prices or where to purchase... I got mine here from EV Drives.

Will update with photos. It looks snazzy!

Alltrax Controller

Alltrax AXE 7245 Controller - also pictured is the Kilovac contacter, pre-charge resistor, diode and fuse.

1 October, 2009 at 17:58 by voltswagen

Posted in Electric Car | 2 Comments »

18 Sep 2009

2/0 Welding cable for the EV battery pack

There are plenty of EV sites on the web and all seem to offer different advice on the size of cable needed for the battery pack. I have read some say 1/0 welding cable is fine, while others recommend up to 4/0 welding cable. (Welding cable seems to be the best choice since it very flexible and ideal for routing through the car). I am going to assume the 4/0 is for the higher volt/amp  packs... i.e. 144 volts or greater. Since our little electric vehicle is planned at only 48 volts I would think that the 1/0 welding cable would do just fine. But since I found a great deal on a 50 foot, 2/0 welding cable (free shipping) and to top it off it is made in the USA. The 2/0 cable also allows me to change the battery pack voltage later if so desired without the need to upgrade all the cable.

Here is where I purchased my welding cable :: Harris Welding Supply.

50 foot of 2/0 welding cable

50 foot of 2/0 welding cable

18 September, 2009 at 15:06 by voltswagen

Tags: 2/0 welding cable, battery pack cable
Posted in Electric Car | 2 Comments »

22 Apr 2009

Day 1 – The electric vehicle project starts

Totally by coincidence the day I picked up the vehicle was also Earth Day 2009.

The overall goal is to have this jalopy powered entirely by wind energy. Living in Iowa, I have seen fields of wind farms spring up in a matter of months. (I will add a post with some photos of a nearby wind turbine field). Our power company offers customers the option to have a portion of or up to 100% of their energy use come directly from wind energy. While I know they can't supply my home energy directly from the wind turbines, I understand that the power company probably produces X amount of wind energy and month and I use X amount per month... so there you go. Since they don't store energy it seems kinda iffy, but I do understand what the power company is trying to do and the more people who sign-up for the program the more turbines they put up.

OK. Goals. Gotta have a goal. Having some sort of goal or desired range and speed is important when planning an electric car conversion. I live in a very small town so my needs are limited. A couple of goals I want this project to accomplish in order of priority.

  1. Work. Having it actually work would be good!
  2. Be able to buzz around town (30 mph max)
  3. Be able to bring the kids to school
  4. Be able to go 16 miles round trip to a local state park
  5. Be able to go 20 miles round trip to the next town
  6. Be able to haul 2 kayaks on a roof rack 25 miles round trip
  7. Be able to go 50 miles per hour

I am hoping for the first 3 goals. Anything after that would be awesome. But, after looking and searching at EV Album for VW Beetles I found a few using same motor/controller/voltage that I am planning and are reporting around 40 miles in range. So, maybe I can reach all 7 goals!

OK. Now some info about the junker. It is a 1969 VW Beetle Bug. Now, I'm not quite sure if it was actually driven as a Baja Bug or not, but someone at some point started converting it from stock to baja. The plan of most that convert gas cars to electric is to sell the gas motor and recoup some expenses of the car or project. This VW Beetle didn't some with an engine, but it was partially converted to a Baja and had a fiberglass front end and probably 150lbs of metal removed off the back. So, I forked over $525 for the car. Since the 1-piece fiberglass front-end is worth around $325 dollars it seemed like an OK deal. It did need quite a bit of work, new brakes, had some rust holes, front tires are good, back tires are bad. It had been stripped and media blasted. And anything I do to it is an improvement... I think!

Interior - rear seat area
Interior – rear seat area
69 VW Bug
69 VW Bug

69 VW Bug
69 VW Bug
Front cargo area
Front cargo area

Interior - Front
Interior – Front

22 April, 2009 at 13:45 by voltswagen

Posted in Electric Car | No Comments »

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