1boris said:
ornias said:
1boris said:
The 250w EN15194 motors like Bosch,Yamaha and others dont have problems with overheating.Most of them peaks about 800w with no problems.The 250w TQ motor peaks around 1200w and no overheating problem.
The problem with overheat is poor design,Low internal gearing and small stator/rotor.The point of mid drive is to not overheat when climbing
Make somethings clear:
ALL of these motors will overheat when running continuesly at more than 250w. This means that the cooling is not sufficient to keep running at high wattage. This is required by law/regulation/standards.
How all those manufacturers deal with this, and I expect this is going to include CYC, is lowering power when the temperature goes above a certain point.
Just because a motor overheats when running 10 minutes at 500W, does not mean it will actually run at 500W. A manufacturer can chose to, instead, run it for 5 minutes at 500W and fall back to 250W. (simplification.
In short:
The overheat is there.
However it will not overheat because it has a temperature sensor.
THis is the primary flaw with the TSDZ2: It lacks a temperature sensor. With a temperature sensor, you can run as many watts through it as you want (within reason ofc).
Sorry to read that you really dont know what you are talking about.I have had several of these motors climbing long steep mountain roads road here in Norway at 110kg.They do not overheat.250w is nothing.The TQ 250w motor is almost as powerful as the Bafang Ultra.
The Tq motor is used in the M1 SPITZING and can do 75 kmh
Please actually read what I wrote...
I'm not saying that the end-user unit overheats, i'm saying the motor will overheat at continued use above 250w. They have thermal-protection which just lowers the actuall wattages (aka: limits peak consumption).
So yet again:
ALL motors sold in the EU for ebikes (not speed-pedelecs!) need to overheat when continued load above 250w is applied. The only way to do so is by temperature based load-regulation (aka: limit wattage at higher temperature).
It's the law and all tests on all EN15194 compliant motors confirm this as well.
This does NOT mean your personal unit will overheat, it will just limit output when the temperature increases too much. You're not wrong, but you're simply not correctly reading what I wrote.
Stop talking down to experts on maters, based on your ancedotal end-user experiences. Your experiences might be valid, but your uneducated conclusions are not.
I'm actually one of the resident experts of EN15194:2017 and wrote many explainatory pieces by now.
Calling me out on not knowning things, is absolutely absurd in this case.