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Messages - nedfunnell

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1
Parts, Mods And Hacks / Who's installed Domino throttles?
« on: June 30, 2018, 08:03:17 AM »
I know some folks have installed Domino throttles for the reduced twist angle (78° instead of 90°) and seemingly better build quality. My Domino just flaked out after three years. How are everyone else's Domino throttles holding up?

2
Zero Motorcycles Forum | 2013+ / Re: Another Melted 120V Charge Cable
« on: June 30, 2018, 02:06:28 AM »
Quote from: BamBam on June 27, 2018, 01:14:48 AM
Is that a 12ga 5-15P to C13 power cord (similar to the one that comes with the bike) you are referring to?  If so, please let us know where we can source such a cord.  The heaviest I've seen these cords is 14ga.

I looked at mine and it is indeed 14awg. My error- I think it has some extra insulation or something, since it's definitely the thickest C13 cable I've ever seen.

3
Zero Motorcycles Forum | 2013+ / Re: Another Melted 120V Charge Cable
« on: June 27, 2018, 12:00:08 AM »
Quote from: Killroy on June 26, 2018, 02:38:07 AM
Quote from: Erasmo on June 25, 2018, 01:14:07 PM
Step 1 is to check your voltage on the wall.

Voltage at the wall is 119 to 120 V without anything plugged in.

Can you check the voltage with a load on it, either the bike charging (if it's possible) or something 1000 watts and up, like a space heater? If there's a significant drop, it could indicate a wiring issue.

I was able to locate a 12ga C13 cable through my BIL that works in IT. It's nice to have something a bit heavier duty.

4
Home Brew / Re: Custom Eltek Quad charger 8500W
« on: June 26, 2018, 11:21:34 PM »
Quote from: Erasmo on June 25, 2018, 01:35:54 PM
They can accept DC iirc, but it isn't worth the cost and added volume and weight. If you're touring there are plenty enough of +11kW stations to plan your trip around and if you're using it for destination charging charging during a meeting or something the added time shouldn't matter.

Even in the worst case scenario at 11kW you can do a quick 5-10 minute top up and you have more than enough juice to make it to a 22kW station.

I wish we had that kind of network where I live! I installed a public station in my town with a state grant, and it's the only public charging station within 65miles (100+km)! Being creative with charging points is part of life for me here.

5
Home Brew / Re: Custom Eltek Quad charger 8500W
« on: June 24, 2018, 08:34:47 AM »
Do you know if the Elteks would run off of DC input? I have found that some supplies will, and some won't. My Meanwells are happy to take DC, and some server power supplies I tested do, one type didn't. If you rectified the 3ph power to DC, and the DC voltage wasn't too high (should be about 400v, right?) then maybe you could run everything off of an 11kW station reliably.

I can't remember for sure, but I think the Zero onboard charger has been tested on 200VDC input.

6
Parts, Mods And Hacks / Boosting voltage on Elcon with external PSU
« on: January 09, 2018, 04:25:27 AM »
I got a deal on a pair of Elcons to charge my homebrew bike. Elcon PFC-2500s, TCCH-60-35. The chargers are 80v max voltage, and for my 24s LiFePO4 pack, I need to get up to at least 85v or so to charge. I have been thinking of wiring an external PSU in series to get to voltage where I need it, probably a 12v one. Getting a 12v/35A PSU for each won't be too hard. Maybe even a 12v/70A one I can use for both, if possible, for simplicity- not sure if that'd work.

Anybody know if the outputs of the Elcons are isolated? That'd make things easier. Anybody done something like this before?

7
Buy Sell Trade / FS: Fully functional, needs-nothing Native GPR-S - Free delivery possible- $2500
« on: October 07, 2017, 04:29:01 AM »
I am moving up to a new project, but my current daily ride has to go to finance the new one as a winter project. I ride it almost every day, and it needs nothing.

Some specs:
Based on a Native GPR-S
ME0709 DC motor
Alltrax 7234 motor controller
11 Leaf modules for 5.5kWh nominal, but more like 4.5kWh observed
CycleAnalyst 2.11 for energy info: volts, amps, power, efficiency, etc
2kW onboard charger based on 2x Meanwell RSP power supplies
Domino throttle
Also included: DeltaQ QuiQ-DCI charger, not onboard



Real life range is about 40mi in mixed riding, or 32-35 at 65mph, depending on terrain. I've had it up to 75mph. It has about 8000 miles on it. I laid it down once a few months ago, a decent scuff to the left panel, a chewed-up left grip, and a grind mark on the kickstand have been the only apparent damage. It'd ridden fine since then.

Needs nothing, I just rode it 28 miles today. You can see the build process and more in this thread.

$2500 delivered anywhere along this route (UT to FL) or very close to it, on/around November 1-3.

8
Parts, Mods And Hacks / Re: Meanwell + server PSU charger
« on: October 26, 2016, 06:36:14 AM »
Further clarification from MW:

Quote
PV refers to the output voltage programmable function, for which you apply a DC signal to the control pins to trim the output voltage.
Adjusting the output voltage with the trimpot will have the same effects on the under voltage protection limit.
However, the tirmpot can only go to a certain value, whereas the PV function can go all the way down to 40% trimming.

9
Parts, Mods And Hacks / Re: Meanwell + server PSU charger
« on: October 25, 2016, 04:28:55 AM »
I asked Meanwell, here is the answer I got:

Quote
If the RSP-1000-48 is loaded to the maximum current, the output voltage will be maintained until the current draw is increased beyond the overload protection point.
Once the overload protection has been triggered, the output voltage will fold back to a very low value.
The RSP-1000-48 will only operate in constant current mode if the output voltage is clamped by the load, such as in charging or LED driving applications.
The clamped output voltage has a under voltage protection value about 70~80% of the current PV set voltage.
For example, if output voltage is not adjusted, then the 48V default will support constant current operation for voltage down to around 33.6V.
A output voltage clamped to values lower than 33.6V will cause the power supply to shut down.
This value can be lowered by using the PV function.

I presume that "PV" refers to setting the output voltage with the trim pot. Right?

10
Parts, Mods And Hacks / Re: Meanwell + server PSU charger
« on: October 24, 2016, 04:36:56 AM »
Quote from: Doctorbass on July 13, 2016, 10:20:50 AM
Yes guys you have to make sure that the power supply you use can take voltage drop of your empty battery pack otherwise it will enter in protect and you will need to reset these ( unplug and plug back)

3 years ago when i made the first post about Quick Zero charging using CC-CV power supply i used the RSP-2000 witch have a voltage adjust feature that can go as low as 40% of their rated voltage. . If you use a 2013+ zero a empty pack is 28 x 3.0V = 84V minimum voltage. and from a 116v full that's 32V delta that your power supply have to tolerate. This mean that the power supply that you will connect in serie to get the desired voltage will have to take a drop of 32V at their output when in constant current mode and pack is empty. and you want that power supply to be the one with the highest voltage.. ex if you use two 48V  and one 24V in serie, then the 48v will have to be the one that fall in constant current first so the current  they supply must be less tahan the 24v so the 24v will remain at 24v and one of the 48V will take the drop  of 32V. As well the 24V MUST not have to take the 32V drop as it would need to go in reverse voltage...

in other words when you serie multiple power sppply in serie, make sur ethatthe one that will take the voltage drop when connecting your empty battery will be the one that have a voltage that is higher than that drop.. and that this is the one that will have the lower current limit.

Doc

So do you know how much the RSP-1000-48 will sag without failing? For my bike, I need about 12v of sag. Can the RSP-1000-48 sag that much?

11
Parts, Mods And Hacks / Meanwell + server PSU charger
« on: June 07, 2016, 10:57:18 PM »
Howdy folks,
I was going to reply to this thread where this subject is discussed, but decided not to necro it and derail it from the OP's build.

I would like to double my bike's charging speed. I have a 22s Leaf cell pack and charge it to about 91v using two Meanwell RSP-1000-48s trimmed for the desired ending voltage. This gives me 21A charging, which is great, but I want more.

I ordered a HP ESP-120 server power supply which provides 51.2v and is commonly modified to provide power for 48v input chargers by the model flight crowd. My hope is that I can put the RSPs in parallel with their current sharing mode enabled, and put that unit in series with the server PSU- so I'd get 51v from the HP, and then the pair of Meanwells would provide the remainder of the voltage and current control.

I was warned that this could be a problem, as I've been told that the RSP-1000 units will only let the voltage sag 9v or so from their setting in constant current mode. Can anyone confirm that? If so, I couldn't use this to charge from 0% on my pack without re-trimming the voltage. Do I have that right?

This will also get interesting because I 'hacked' one of the RSPs to provide a half-power mode by removing one of the two sense resistors on the underside of the PCB and replaced it with a switch on some short wire that provided similar resistance. I'll have to remove that and hope that it works as originally built.

For reference, here is my original build thread.

12
Home Brew / Re: CHAdeMO
« on: April 13, 2016, 06:38:29 AM »
Sorry for the thread necro, but I figured I'd leave this extremely relevant link here for future searchers:

https://chargedevs.com/features/zero-motorcycles-was-forced-to-abandon-a-dc-fast-charging-option-in-2013-better-interoperability-testing-is-needed/

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