Search found 409 matches

by MJSfoto1956
Jun 20 2019 8:17am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

larsb wrote:
Jun 19 2019 11:38pm
That's glorifying a bit, EG did his usual "testing"...mad scientist and shoestring does not fit.
Oh he fits my definition of a classic mad scientist -- i.e. someone who likes to break things! :P

M
by MJSfoto1956
Jun 19 2019 4:59pm
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

It is exactly one year ago when i bought the modules in May-June 2018 To be fair to all, if you are down in the trenches, then one year seems like an eternity (I've been there). If you are a consumer, then a year is like yesterday (I've been there too). Can we make an effort to understand each othe...
by MJSfoto1956
Jun 19 2019 6:59am
Forum: Battery Technology
Topic: AliExpress battery pack unboxing
Replies: 128
Views: 5392

Re: AliExpress battery pack unboxing

What are the suggested max phase amps? According to QSmotor: "The motor supports peak phase current 500A to 600A. " Notwithstanding, other than take off, the bike is a joy to ride at speed -- exceeds my expectations. Just need to work on the take off and I'll be a happy camper. OTOH, there is some ...
by MJSfoto1956
Jun 18 2019 8:57pm
Forum: E-Bike Technical
Topic: DIY 0-5k throttle
Replies: 11
Views: 223

Re: DIY 0-5k throttle

I see 3 wires so I'm thinking hall sensor. AFAIK, most POTs use 3 wires too (see photo below). Notwithstanding, if it doesn't provide better behavior than my current cheap, twitchy Chinese Hall throttle, I'll simply hack it to use a high-quality POT instead. Something like this: https://sc01.alicdn...
by MJSfoto1956
Jun 18 2019 7:42pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1076
Views: 77111

Re: bluetooth BMS?

...You need to pair it with your phone first. That is mandatory for every BT device. That is how it works... Well, you are "technically" right, but the advice above might lead to confusion for certain setups. To wit: Neither my PowerVelocity app nor Xiaoxiang app should ever be directly paired via ...
by MJSfoto1956
Jun 18 2019 3:56pm
Forum: E-Bike Technical
Topic: DIY 0-5k throttle
Replies: 11
Views: 223

Re: DIY 0-5k throttle

I'm ditching the cheap, twitchy hall throttle that came with my Chinese electric scooter/moped in favor of a remote POT activate by a good-old, tried-and-true throttle cable. I've ordered one of these from AliExpress: https://www.aliexpress.com/item/Electric-Motorcycle-Scooter-Accelerator-Unit-With-...
by MJSfoto1956
Jun 18 2019 1:19pm
Forum: E-Vehicles General Discussion
Topic: Is this corrosion in my hub motor?
Replies: 7
Views: 169

Re: Is this corrosion in my hub motor?

were you riding on the beach or anywhere near the ocean?

M
by MJSfoto1956
Jun 18 2019 12:24pm
Forum: E-Bike Technical
Topic: Do you like puzzles? Help with this controller protocol
Replies: 5
Views: 124

Re: Do you like puzzles? Help with this controller protocol

My first guess is that everything between the checksum and packet number could be a bitmap. Try converting the stuff "in between" to a bitmap and then see if grouping parts of the bitmap into 16-bit or 32-bit chunks might say something to you. The processor being used might suggest a strategy for th...
by MJSfoto1956
Jun 18 2019 12:01pm
Forum: E-Bike Technical
Topic: Do you like puzzles? Help with this controller protocol
Replies: 5
Views: 124

Re: Do you like puzzles? Help with this controller protocol

How many packets are there in total?
And can you post a block of sample packets grouped by sample speed?
(a spreadsheet might come in handy here...)
by MJSfoto1956
Jun 18 2019 11:47am
Forum: E-Bike Technical
Topic: Do you like puzzles? Help with this controller protocol
Replies: 5
Views: 124

Re: Do you like puzzles? Help with this controller protocol

can we assume the last byte is some sort of checksum?
(and thus can be ignored)

M
by MJSfoto1956
Jun 17 2019 7:40am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

My story: I had a problem with two BT modules which both did not work on arrival... If your story is more than two years old, then you are being disingenuous by (deliberately) not mentioning that fact. I think that your constant harping on an earlier experience (which will likely be interpreted as ...
by MJSfoto1956
Jun 16 2019 9:03pm
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

+1 for inadequate weather proofing. Controller was no where near "sealed" upon further inspection Hard to disagree with that statement -- OTOH, the majority of controllers on the market are lacking in waterproofing, especially with regard to the connectors. As such, one of my first "customizations"...
by MJSfoto1956
Jun 16 2019 5:35pm
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

ElectricGod wrote:
Jun 16 2019 5:31pm
What I have said is the module and app are the best there is. I'm challenging anybody to show me the product that's better.
+1 on the app.
by MJSfoto1956
Jun 14 2019 3:39pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing
Replies: 128
Views: 5392

Re: AliExpress battery pack unboxing

How much voltage sag do you get on that big battery pack in how many amps is your controller set at I don't have a lot of data, but when pushed hard I've seen about 8V sag @ full throttle going up a hill. The controller is currently set to 82A battery & 230A phases. I may up the phase Amps a bit mo...
by MJSfoto1956
Jun 14 2019 11:37am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

ElectricGod wrote:
Jun 14 2019 11:23am
Temp inputs are separate connectors on the module that have nothing to do with the CA connector. Maybe you have a custom made wiring harness, but they don't come from PV that way.
I stand corrected. My bad.
by MJSfoto1956
Jun 14 2019 11:34am
Forum: Battery Technology
Topic: AliExpress battery pack unboxing
Replies: 128
Views: 5392

Re: AliExpress battery pack unboxing

Some more progress on little details: I found a used PUIG windscreen for cheap, then modified some of the clear plastic to fit the scooter's tight dimensions. Made a custom mount for the license plate out of black HDPE Took a nice 30 mile round-trip to get the bike inspected -- given their reaction,...
by MJSfoto1956
Jun 14 2019 9:52am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

That last chip was the one that was sent to me. It only has one temp input. And powervelocity said any other "open ports" were under development, aka no dual temp sensor inputs as far as I can see. The controller temp comes via the CA connector while the other (single) temp sensor mentioned above i...
by MJSfoto1956
Jun 14 2019 6:37am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

larsb wrote:
Jun 13 2019 11:53pm
*Pick*, damn, it got to be 88V,
*Pick*, damn it, 76V
Yeah I gave up on the sliders -- I just click the number field and type in what I want. Works every time.

M
by MJSfoto1956
Jun 11 2019 4:18pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing
Replies: 128
Views: 5392

Re: AliExpress battery pack unboxing

So I just took a quickie 3.8mi test around my neighborhood with some runs up/down various nearby hills. Temperature was 80°F/26.7C Charge was at 91% PowerVelocity 20kW 100V controller, limited to 82A battery, 230A phase QSmotor V4 8000W hub motor 57Ah 20s 17p li-ion battery pack Approximately 284lbs...
by MJSfoto1956
Jun 11 2019 7:54am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

How do you read motor temp when the seller didnt have any point on BT module for input nor would advise on it? There most certainly is a what you call a "point on BT module for input" on the PV BT module. In fact, I just last week wired my V4 QSmotor temp output directly to the PV BT module and the...
by MJSfoto1956
Jun 10 2019 12:57pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing
Replies: 128
Views: 5392

Re: AliExpress battery pack unboxing

999zip999 wrote:
Jun 10 2019 11:51am
Give it some time and cycles before you try to find LVC.
Yeah I'm currently limiting charging to 4.1V and not letting it drop below 3V -- just so I can get my bearings first.
by MJSfoto1956
Jun 10 2019 12:53pm
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

Also almost always harder to see under bright sunlight also. Just went out for a spin on my bike in bright sunlight. No issues reading the iPhone display running the PowerVelocity app -- even through dark sunglasses and a tinted visor. And prominently shown below the speedo was both controller and ...
by MJSfoto1956
Jun 10 2019 11:23am
Forum: Battery Technology
Topic: AliExpress battery pack unboxing
Replies: 128
Views: 5392

Re: AliExpress battery pack unboxing

It will easily do 50mph up hills that my 150cc ICE scooter had trouble doing 45mph. Not sure of the top speed yet -- still tweaking things. On a related note, the other day I went for a 25mi round trip and it used 25% of the battery (i.e. it went from 50% to 25%). I wonder if that suggests that I mi...
by MJSfoto1956
Jun 10 2019 11:19am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 97
Views: 3275

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

ElectricGod wrote:
Jun 10 2019 11:13am
... Of course, the question that comes to mind for me is, why would you want to? The phone app is excellent!
+1