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  1. Fun with industrial VFDs

    A long time ago I bought an IDM "PowrMaster" VFD, 480V at 9 amps, which never quite worked, and now I am stripping it for parts and maybe repurposed for a DIY inverter: It appears to be 3.7 kW (5 HP) and with all the panels and parts (not all shown) it probably weighed at least 40...
  2. Analyzing, troubleshooting, & fixing EMW 10kW DIY Charger

    Batteries and Charging
    I have finally gotten started on my efforts to work on a couple of these chargers that forum members have had trouble with, and sent to me to see what I might be able to do. I am still recuperating from cervical spine surgery so my mobility is a bit limited, but I have made some progress, and I...
  3. Battery quick drain.

    Technical Discussion
    Hi, this is my 1st post. My vehicle is for special events and will not be street driven except for parades. It will pull a passenger trailer. 10mph max. All the equipment was bought used. Parts: Warp 9", Kelly 1000 amp controller, Albright sw180 Main contactor, albright dc182 reverse...
  4. Controller Issues

    New Member Introductions
    I am currently in the process of bench testing a permanent magnet electric motor when I cam across a bit of a hiccup. The motor is wired to an axe7245 alltrax motor controller, a 0-5000 ohm pot box and is running on 24v. After everything was wired up I went to test it and discovered that the...
  5. Curtis 1231C-8601 controller issues

    120V lead acid car Problem 1 When I drive my car I will sometimes get a 400 amp acceleration boost. This has just started happening to me. I have had it hit 400 amps for two seconds in first gear at full throttle, but now I will sometimes get 400 continuous amps while driving 35mph or...