Endless Sphere

Matador is probably right. PSWpower is selling the max current rating. Here's the inside of my 20A sinewave model. and there's only 6 MOSFET's. I've got the S12S, rated at continuous 25A, and I believe there are 12 MOSFET's in it. P1070640.jpg In any case. I've also been running the very mild manner...

Is this a motor intended to work with a cassette or freewheel (in which case it will be offset by whatever is needed to attach the gearset)? Or is it a true front wheel motor, which is symmetrical? Either way, the spokes can be made longer on one side and shorter on the other (by adjusting the nippl...

You're charging to 3.8V/cell The pack will eventually get unbalanced and you have to charge to 100% to get a balamnce BMS to balance. I also think you give up a lot of capacity at 3.8V/cell. People say you only lose 10%, but that's at low current. If you start pulling 1C or 2C, it seems to me the lo...

I just got a completed$300 battery from UnitPackPower (UPP) from CHina to Illinois. In spite of what I hear about tariffs, there were no extra customs fees assessed. Maybe doesn't apply for something small? It was properly labelled as a lithium battery.

If you look inside your controller at the caps and if they are 45v or 63v. The later can handle 52v. Maybe not your display thou. I think he will be OK with the display. The 810LED displays come in 24V, 36V, and 48V versions, and they will have a sticker to denote the voltage. I have both the 36V a...

On many ebikes, the throttle only works after you have selected one of the available PAS levels. If your ebike powers up in PAS 1, then ignore this statement. So now you put your meter on the throttle output wire and see if it starts at 1.0 V and goes up to around 4 or 5 volts when you turn the thro...

High current, high voltage power devices do cost money. On the other hand, controllers and comparator IC's are so cheap. I understand your concern that the low cost of a BMS could extend to the components and quality of design.

Aha thanks. Is there a diagram for just using the BMS for voltage monitoring, to open/close contactors rather than routing all current through the BMS? Would use separate protection, e.g. fuses for overcurrent and short circuit protection. If you paid someone enough money, he/she would tap off the ...

By the way, E=HP, I hadn't noticed your build report before.Nice job on that bike.

I agree that you can probably find a 48V silverfish battery. but 52V may not be available. Some 36V controllers will run on 48V, but the problem is that their low voltage cutoff (LVC) is still locked in for a 36V pack. In fact, my first DIY ebike with a 36V controller will run all day at 52V, but it...

There is a long long thread about the TSDZ2 here.
viewtopic.php?f=28&t=79788

In it, they talk about reflashing the motor firmware so it will run on 36V. You have to buy a couple of little electronic clip-ons, I was going to do that, but I never did.

Many KT controllers have a connectors that can be jumpered to enable cruise control.

Are you sure you meant LCD1? My LCD1 controller only has P1-P5. You can buy a LCD3 or a higher lever controller that has the additional C parameters.

LCD1 has the buttons in the same case. LCD3 has the buttons in a separate unit.

I'd agree with that. Sensor problem, either continuity or the component is bad. I don't know of any multimeter tests to help here.

Is it a US seller?

I just took delivery on a brand new ebike I purchased on ebay. It came with a hub motor and the KT LCD3 display. The very first time I tried to ride it, the error code 3 came in. I checked all the wires and connectors. They all look good. I then used my voltmeter to verify 5v going to the motor hal...

Hey, Back with an update. So yeah most of you were right apparently the cable was broken.. I'm not sure how that happened but at least its fixed now. The motor cables seem to be pretty fragile Great. I didn't see your update when you posted originally, but glad to hear you figured it out! Me, I've ...

Yes, I have used these PSWpower 36/48V 20A sinewave controlers. When a battery is attached, the controller looks at the initial voltage and will select either 36V or 48V. Normal range of a 48V pack is 42-54V. Normal range of a 36V pack is 30-42V. If You attach a discharged 48V pack that is at 44 V, ...

I would do Blue and Yellow to 1 and 2.

When repairing the cable, you obviously matched the wire colors. SInce you supplied the PDF, this is the likely definitions, Red VB: battery voltage, Has to be battery voltage if display can show battery status. Blue Control: The 880 probably connects blue to red to start controller. GND Black: batt...

If you already have the display, then you have to know what controllers work with it. In general, compatible controllers and displays are made by the same company, or they sold by the same seller who knows that the pair work together.

Only one time did I have a opportunity to choose a cassette, and that was the Q100C vs the Q100H. Since the Q100's are dinky motors, I chose the freewheel version because it's a little wider and BMSBattery said it had more torque. And because I put them in 20" wheels, I had to go with the DNP 11T-34T.

Have not damaged any from electrical mishaps, but all were standard 3 wire units. If playing around with a model that brings in battery power to a start button, yes, you would probably smoke it if you miswired any of the low voltage throttle circuits to the battery,

Last night I put a 48V charger by mistake on my 36V 10S-3P shrink wrapped pack. Worse, I had an XT60 adapter plugged into the XT90 discharge port, and thought it was the XT60 charge port. So no BMS protection. I discovered my error a few hours later when I unplugged the pack, saw it was too warm and...

Well, if you can see the 7805, why not check the output. Left side is Vin. Ctr is Gnd. Right side is %V. How do I go about this? Simply connect the multimeter set at 20V DC to the two sides? I figured that if you knew what a 7806 was, then you knew how to use a voltmeter. Black pin on ground. Motor...

Most ebike controllers use the voltage level on the throttle input to control motor speed. WHen they have PAS inputs, they count the pulses produced by the PAS sensor.

That means, No, you cannot connect a PAS sensor to a throttle input.