Recent content by harrys

I have a motor tester that tests the Hall sensors, so I count how many times they flash. You can also do it by feel, with two phase wire tied together. I'm dubious about that, because of the strength of cogging, but people say it works. By the way, I have an AKM 100 and mine is 12.5:1 gearing,

Sorry to be a grinch. Is it a sturdy frame bag? I think the vulnerability in these triangle batteries is that their weight makes them prone to damage if the battery falls off the bike. Unit Pack Power Triangle packs are now banned from sale in both the UK and USA because of fires (seven...

I use one of those inexpensive wattmeters between the battery and the controller. They can be variable in accuracy, but this one has been verified to be within 5% on current with my expensive clamp-on DC ammeter and also a fairly accurate load tester. I assume that if the current is close...

I was going to pursue this last year, but got sidetracked. My wife was unhappy with torque sensing on her TSDZ2B equipped bike. Not enough power. The embrusa/OSF allowed me to do a switch from Hybrid mode to Cadence mode in the field. She liked it immediately, and I was surprised at the...

No one has mentioned the Tong Sheng TSDZ2 mid drive kit with coaster brake option yet? I will. It's almost the same price as most hub motor kits. It doesn't need brake levers or throttle. Doesn't have the risk of snapping the forks like a front motor. I think it is very simple to install too...

Matthew has it right. Voltage sag will cause the bike to shut off when the nominal battery voltage is 42-44 volts, above the 40V cutoff you may expect. It's always there, and if you have the means to view it on your meter when riding, you can see the difference between being under power and...

I have installed several AKM100H's on 20" hubs with 20x2" tires. One bike has 8000 miles. I don't think I would go any smaller than than 100H for a 26" wheel, and would prefer the larger AKM128,

Are you running stock TSDZ2 firmware? The only time my throttle did not work was when I first loaded in the OSF firmware. I configured it wrong and had no throttle. Otherwise, it's always been active on both the kits I've installed, It works as long as you select one of the four assist modes...

Samsung 21700 cells in a 48V30AH battery would mean a 13x6 cell matrix assuming 5AH cells. A very nice battery, At 25A, each cell needs to provide only 4.1A, which is well within capability.

I've never seen more than 25A measuring with an peak current wattmeter from my first BBS02 from 2015. I believe Bafang has lowered the max current too on newer motors. I think a 35A BMS is more than enough.

You need a battery that can put out 30A. That's relatively easy with a 30Ah pack if the seller is honest. Not going to bore you with the math, but as long as they use high current cells, you'll get the current.. . Back in 2015, I bought a 48V12ah pack that was rated for 30A for my BBS02 Also...

50% after 17 miles with a 1000Wh battery? That's around 25WH/mile. You must have been averaging over 20 mph, wearing bulky clothing to catch the wind. For a slower speed comparison, my BBS02 runs under 10WH/mile at 12 mph, same as my hub motor ebikes. I've tracked it at 20 WH/mile when riding...

This is why I own the LCD3, I want to see the instantaneous wattage, the ambient temperature, my miles travelled and the speed. It also calls up the voltage, max and average speed. You can buy the LCD1 which only shows the speed, but then you lose ability to l lower the current settings I...

On the LCD3, the temperature refers to a sensor inside the display. The LCD3 settings do allow for it to read a remote number from the controller, but the controller has to have the capability to read and send it. I've owned a number of KT controllers too, maybe five different types, and none...

The KT controller's throttle input looks for a voltage between .8V and 4.2V, As you go toward 4 V, you approach full throttle. Most throttle controls use a hall sensor chip which reads a rotating magnet to control the voltage, The advantage is that there are no moving electrical parts like...