Recent content by WDR

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  1. W

    High voltage 18650 pack

    The higher initial voltage will not be an issue. Acording to the manual the low voltage trip is 400+\-20v, and the high voltage trip is 790. I don't know that I'll be getting to this project that quickly (recently moved, not a lot of cash or a work area right now)but if/when I do I'll be sure...
  2. W

    High voltage 18650 pack

    And looking through the drive manual it looks as though I don't need a voltage that high. I believe 420 is the minimum D.C. Voltage, so that helps
  3. W

    High voltage 18650 pack

    Okay, thanks for all the info! And yeah, as far as cost and such I will not be able to do this right now although now have an idea of what it would entail. I haven't really done much with battery powered systems in general so didn't have a good idea where to start with it
  4. W

    High voltage 18650 pack

    So then the rc type packs, can those be seriesed in that quantity without any sort of regulating circuits between? I'm just thinking with the combined overal voltage level if any one cell or pack had an issue things could get exciting quickley.
  5. W

    High voltage 18650 pack

    Yeah, the electronics are more the part I wasn't sure about, I had come up with about what you've stated about the batteries themselves but I have no idea as far as balancing circuits/charging that many batteries...
  6. W

    High voltage 18650 pack

    Thanks for the reply, as for the application I have a 480v vfd drive I use to run large motors on various projects and stuff I have(like a tornado siren, another area of interest). Often I'd like to run these in remote locations, a generator is obviously the logical choice however they are...
  7. W

    High voltage 18650 pack

    Hi all, I'm wondering about the feasibility of building a rather high voltage 18650 battery pack. would need to be 670v and around 30a although only looking for 5-10 min of capacity. I'm thinking this isn't really feasible but currious what thoughts people have? Aside from the obvious high...
  8. W

    4000 Watt short arc searchlight project

    Ahh, yes thanks for the remindor about temp sensor and the ignition voltage, probably would have overlooked that. It was my understanding that the military lights used a heat exchanger, I just didn't consider it feasible thinking conponants wouldn't be available until I thought of the...
  9. W

    4000 Watt short arc searchlight project

    Yeah, I know the airspeed depends on resistance over the system as a whole and such, I was just trying to get some sort of baseline idea so that I can choose a oversized fan that actually is oversized. that I can slow if required as you mentioned. I was thinking on testing with a thermocouple...
  10. W

    4000 Watt short arc searchlight project

    So, not just dragging this up for no reason, I've been working on the light lately with good progress. So far I have made a cage for the reflector and have it mounted into the cage, I'm currently constructing the mount and focusssing aperatus for the bulb and I've purchased another welder...
  11. W

    4000 Watt short arc searchlight project

    It's pretty easy to remember things differently then they are, I haven't even been on here very long and I am fully confident in your input BVH. just want to let you guys know I am currently still progressing on the light. I have redone the ignition system with a noticeable improvement. I am...
  12. W

    4000 Watt short arc searchlight project

    Slowly, I'm still considering how I'm mounting the bulb and reflector allowing for focussing.
  13. W

    Questions on power supply for osram xbo

    I will do some under load measurements when I get mine together. I'm thinking now I may wind my own secondary on a core and build a power supply from scratch.
  14. W

    Questions on power supply for osram xbo

    Yes, I get what you are saying. One thing I did forgot about the differences in circuit sizing, I am in the U.S. Even non commercial welders here are often designed for 40 or so amps input and commonly operated on 50A 240v circuits. I'm sure the output voltage is still a bit low, but the...
  15. W

    Questions on power supply for osram xbo

    Yeah, a proper power supply is definitely best. However mainly my point was it can be done without one. And interestingly my welder actually has a specified open circuit voltage of 80 volts I believe. My point with the duty cycle wasn't about the efficiency so much as that you would not be...
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