Recent content by Teh Stork

It is basically going to be throttle or regen, yes - no coasting. Motor 1 will activate torque sensor in Motor under test (motor 2), and Motor 3 will act as a generator. Motor 3 will get the whole brunt of Motor 1 and 2. Could do a simple 3-ph rectifier on the generator, making sure that the...

Hi, We are going to build 3 test benches for mid drive motors. My question is related to controllers with regen capabillity. I have used controllers from Sabvoton, Kelly and TIs Instaspin FOC development boards - most have been a simple coasting regen, where the instaspin board did full...

Test print a 1x1x1 cube on your printer. Measure the precision of your printer. If that isnt the reason why it wont fit: do some CAD Tutorials so you can make the bracket your self ;)

Go away, you are wasting everybodys time with your BS. You are wrong in your understanding of electricity. Open a new thread and be gone.

Having the same problem with some SVMC 72100 Sabvoton controllers. Fitted with variable regen brake connector. Will not work as expected from programming. Can't get slide regen, general ebrake regen or variable regen to work. The brake signal is active when I hold it to VBat (which is ok), 5V...

Just verified that the hall-sensors in my QS single-side axle hub is wrongly connected. Applying 5 V to red and gnd to black, these voltages appear when spinning wheel slowly: Green: 0 - 2.7 V Yellow: 0 - 0.6 V Blue: 0 - 0.6 V Seems like the hall sensor hookup is wrong. Need to remove...

Got a pair of SSC 48060 controllers. Wrongly delivered without secondary 0-5V analog input for variable regen braking. New ones will be delivered, but looks like I will have to make-do with the current ones for a while. Is there any way to modulate sliding mode or regen braking? I have a...

Drilled new holes, want to have a solution that lasts. One down, one to go :twisted:

Hi, Long story short. Bought motorcycle style motor, custom made. Spoke holes are Ø4,2mm in diameter. Going to lace in bicycle rim. Ordered to length 13G spokes. I want to do this somewhat the right way. Problems: 1. Spoke hole too big, nipple falls through 2. Spoke "neck" too short in...

VW E-UP! ZymlqWxwqNI Love it :twisted: Perfect city EV.

One Norwegian startup tried to get rid of the gearbox and run windmills direct drive. Part of the invention was a stator and rotor supported like a bicycle rim, with spokes. One set to hold the rotor, and one to hold the stator. Regarding air-gap fluctuations due to shifts in wind and load -the...

I cringe at coming out in Bionx's defence, but that comparison is wrong. The 500W Bionx run somewhere around 1kW max and definitely has torque in the 50-70 Nm range. The same goes for their 250W system that peaks at around 1000 W. In the end, it boils down to watts delivered. Comparing a "1000...

Ok. My understanding of motor design is that power production is a function of active area and magnet speed. Active area gives torque. Magnet speed supplies the necessary angular speed to produce power. Bigger diameter: more magnet speed - more power. Bigger active area: More torque As in...

Your basic math is wrong when applied to brushless motors. Brushless Permanent-Magnet Motor Design by Duane Hanselman goes into the math and basics of motors wrt diameter, weight and power. Chapter 1.8 goes into detail of how motor torque can be calculated: T=k*D^2*L T=Torque, k = constant...

Coming from Norway, this is an very interesting development in Finland. Can you elaborate on when the rule went into effect, and what affect it has had on ebikes in finland? What is MUT's? And does the 1kW e-bike have a speed restriction? The reason I ask is that I've heard some conflicting...