Search found 142 matches

by BobBob
May 09 2021 7:52am
Forum: EBike Troubleshooting
Topic: Blown Controller Mosfets!Is it worth replacing?
Replies: 13
Views: 310

Re: Blown Controller Mosfets!Is it worth replacing?

I replaced the little gate driver with the one from my old controller and it now WORKS!! Thank you all for your assistance! The overheating issue persists however. The only thing I know is that the phase wire ends are pretty much destroyed from fiddling around, but I think they make good contact as...
by BobBob
May 09 2021 6:50am
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 30
Views: 687

Re: Do some motors have more/less torque with the same power levels?

Unfortunately I have no clue what the specs for the motors are. Couldn't find it in the simulator either :( I am after reliability though, so less overheating for sure. I like the amount of power and range I have. More top end would be nice, but 45 mph on an e bike is already more than enough for m...
by BobBob
May 08 2021 9:40am
Forum: EScooters/EMotorcycles
Topic: special pleading
Replies: 70
Views: 1795

Re: special pleading

In the event that I can make this mobility scooter faster .. I wonder how to increase the braking power. if you have a standard DC drivemotor and reduction box it will be difficult to have electrical braking. personally i would try to see if you can get some direct drive hubs in that size. that sho...
by BobBob
May 08 2021 8:43am
Forum: EBike Troubleshooting
Topic: Blown Controller Mosfets!Is it worth replacing?
Replies: 13
Views: 310

Re: Blown Controller Mosfets!Is it worth replacing?

I finally found what the issue is! There is a shorted gate driver on the negative side of the green phase mosfets! 1HC Is written on top of the transistor. I also found 1HC transistor on my old controller can I take that and replace the shorted one on my current controller? Great :) According to a ...
by BobBob
May 07 2021 12:46pm
Forum: Items for Sale - New
Topic: Nucular 12f controller for electric bikes and scooters
Replies: 3
Views: 416

Re: Nucular 12f controller for electric bikes and scooters

It appears to be sold according to ebay
by BobBob
May 07 2021 12:13pm
Forum: EBike Troubleshooting
Topic: Blown Controller Mosfets!Is it worth replacing?
Replies: 13
Views: 310

Re: Blown Controller Mosfets!Is it worth replacing?

2) Replace the gate driver in that section. There will be a trace from the pin you blew to a small IC. (There may be a resistor along the way; the signal goes through the resistor.) Replacing ICs is somewhat difficult, so you may want to get a local shop to do that. (If it doesn't have a separate g...
by BobBob
May 07 2021 10:58am
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 30
Views: 687

Re: Do some motors have more/less torque with the same power levels?

The 48V peak speed is about 29 MPH, the 36V is about 22 MPH. We normally ride about 10-15 MPH. Many steep grades where we ride, 10% climbs some over a mile long. We pretty much ride the same speed (mostly side by side) on the uphills & flats, but sometimes I'll see 35+ MPH on the downhills whil...
by BobBob
May 06 2021 2:31pm
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 30
Views: 687

Re: Do some motors have more/less torque with the same power levels?

If both are the same MAC 10T but driven with different voltages, it will be partly the controller or wiring. Copper losses would be greater for higher current due to lower voltage to maintain the same overall power. Solution thicker wire for the 36V motor? 15-20% seems a lot though and the motor ge...
by BobBob
May 04 2021 2:20pm
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 30
Views: 687

Re: Do some motors have more/less torque with the same power levels?

With nothing but mechanical gear and winding changes, bike b is going faster while using less power, and not overheating, due to better efficiency due to the motor spinning faster. https://ebikes.ca/tools/simulator.html?motor=MMAC10T&batt=cust_36_0.2_16&cont=cust_150_300_0.02_V&grade=6&a...
by BobBob
May 04 2021 1:53pm
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 30
Views: 687

Re: Do some motors have more/less torque with the same power levels?

So it's as I thought then. If they are geared to the same max speed (meaning the winding is irrelevant, right?) and powered with the same controller, they should have the same performance, unless one motor is more efficient than the other. In which case the more efficient motor will have better per...
by BobBob
May 04 2021 11:44am
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 30
Views: 687

Re: Do some motors have more/less torque with the same power levels?

The gear ratio difference also brings up the topic of efficiency. At half RPM one motor will be less efficient than the other at lower speeds. Pole switching frequency plays a huge role in efficiency levels at low speeds so the "Slow Wind" motor converts more power to heat. Efficiency los...
by BobBob
May 04 2021 6:49am
Forum: EBike Troubleshooting
Topic: Blown Controller Mosfets!Is it worth replacing?
Replies: 13
Views: 310

Re: Blown Controller Mosfets!Is it worth replacing?

I would compare the blown channel with the good ones. It is likely that voltages on the control circuits will be similar and you have 6 sets of the same circuit so hopefully can see if something is different. Can you guide me as to what I have to check? I only have a multimeter but I can give the b...
by BobBob
May 03 2021 8:11pm
Forum: EBike Technical
Topic: PowerVeloCity F18-100 controller, not working
Replies: 13
Views: 348

Re: PowerVeloCity F18-100 controller, not working

Could be a bit of dirt but hope that fixes it but if the micro is blown it's probably more tricky. And yes, I agree, not impressive quality I've been looking for higher voltage so have limited options, there's nothing much at 150V and not many at 120v The YKZ120150 is a little cheaper and goes up to...
by BobBob
May 03 2021 7:38pm
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 30
Views: 687

Re: Do some motors have more/less torque with the same power levels?

The bigger motor can potentially provide more torque or power without it overheating, but only if you provide it with more power. You may have to upgrade your controller or battery to do so. The old motor might be limiting the power If you put in 1.8 KW then you will get out 1.8 KW, some of it as h...
by BobBob
May 03 2021 6:03pm
Forum: EBike Troubleshooting
Topic: Blown Controller Mosfets!Is it worth replacing?
Replies: 13
Views: 310

Re: Blown Controller Mosfets!Is it worth replacing?

I agree, give it a go, I have replaced blown mosfets a couple of times on a dead controller. Most of the circuitry round there is pretty robust as you have high spikes of voltage and current so you may be lucky I've also blown a control chip for mosfets so that might be the next thing to go - there ...
by BobBob
May 03 2021 2:26pm
Forum: Bike Mechanical & Structural
Topic: My model of spoke breakage.
Replies: 19
Views: 766

Re: My model of spoke breakage.

A rims resistance to spoke pull through is simply proportional to it's thickness. It's a little more complex than that: A stiffer rim will flex less and distribute the load at the bottom of the wheel more. This in turn will mean that the reduction in load is distributed across more spokes. It's a l...
by BobBob
May 03 2021 6:29am
Forum: EBike Build Threads
Topic: 3KW / 8KW MXUS & Powervelocity 24S2P / 34S6P ?
Replies: 43
Views: 1715

Re: 3KW / 8KW MXUS & Powervelocity 24S2P / 34S6P ?

Thanks Chalo viewtopic.php?f=51&t=111528#p1653334
Need to work out how strong the rim is somehow
by BobBob
May 03 2021 5:52am
Forum: EBike Technical
Topic: PowerVeloCity F18-100 controller, not working
Replies: 13
Views: 348

Re: PowerVeloCity F18-100 controller, not working

I'm only a hobbyist electronics chap so others could help a lot more and I know this is from a year ago but as you pointed me to the thread I thought I'd note: Top right there appears to be a blown capacitor cap.JPG The location you circle appears to be a DC/DC converter - similar - note the small c...
by BobBob
May 03 2021 12:36am
Forum: Vendor Relations Corner
Topic: Trying to buy a PowerVelocity Controller
Replies: 13
Views: 301

Re: Trying to buy a PowerVelocity Controller

Changed your wording for you. :wink: Kinda like how some praise BMS Battery and others loath BMS Battery. Hi Markz, as always thanks for all the references :) They do seem a bit sporadic but also HAVE SOME return customers singing their praises Having a backup plan seems a good idea so a second con...
by BobBob
May 02 2021 11:19am
Forum: Vendor Relations Corner
Topic: Trying to buy a PowerVelocity Controller
Replies: 13
Views: 301

Re: Trying to buy a PowerVelocity Controller

Maybe if I feign interest in the newest and then change my order at the last minute OK, but let me know what strategy works later, when you are no longer a potential customer and need something. Yeah, I reckon patience and persistance but who knows, maybe buy some accessories but money doesn't seem...
by BobBob
May 02 2021 9:46am
Forum: Vendor Relations Corner
Topic: Trying to buy a PowerVelocity Controller
Replies: 13
Views: 301

Re: Trying to buy a PowerVelocity Controller

You're probably ordering the wrong controller. My observation, yours may vary, is that the fastest responses appear to be to questions related to the latest and greatest "next-gen" controller PS. Others have mentioned that being very persistent may help, so you may need to just keep posti...
by BobBob
May 02 2021 9:44am
Forum: Vendor Relations Corner
Topic: Trying to buy a PowerVelocity Controller
Replies: 13
Views: 301

Re: Trying to buy a PowerVelocity Controller

So you are having all this trouble with them, with simple things and yet you still want to buy from them. I could only imagine what would happen to try and get a response from them if something were to go wrong in any aspect after the controller is dropped off at their mail delivery provider. Yet y...
by BobBob
May 02 2021 9:28am
Forum: Vendor Relations Corner
Topic: Trying to buy a PowerVelocity Controller
Replies: 13
Views: 301

Re: Trying to buy a PowerVelocity Controller

Mine did arrive. A nice 7kw brick. https://endless-sphere.com/forums/viewtopic.php?f=2&t=105551&p=1544179#p1544179 I went through this with my IPS e-unicycle and am on my third controller. The UK seller was a good guy and the middlemen were selling him badly repaired second hand kit as new....
by BobBob
May 02 2021 9:25am
Forum: Vendor Relations Corner
Topic: Trying to buy a PowerVelocity Controller
Replies: 13
Views: 301

Re: Trying to buy a PowerVelocity Controller

john61ct wrote:
May 01 2021 7:13pm
Have you searched for others' experiences with this vendor?
Seems pretty mixed for all the controllers and I've read qulte a bit, but there's a lot to read
by BobBob
May 02 2021 9:23am
Forum: Vendor Relations Corner
Topic: Trying to buy a PowerVelocity Controller
Replies: 13
Views: 301

Re: Trying to buy a PowerVelocity Controller

Thanks everyone. I'm surprised that there's no-one chirping up that they're great The response on the thread about this controller seems pretty good with a few teething problems, mainly on the BT. https://endless-sphere.com/forums/viewtopic.php?f=31&t=85156#p1245133 People seem to complain about...