I still have one of my TSDZ2 filled with 5W20 engine oil. In order to do so, I simply drilled a small hole at the bottom of the case (and motor side) and injected the oil with a syringe. Then I filled the hole with a small screw and that's all. I took an oil with a low viscosity to reduce the drag.
The motor and the controller run just fine, and the TSDZ2 is quieter, the lubrication must be better !
When I touch the case after a ride, it's very hot but this means that the heat dissipation is better.
As I said before, it doesn't avoid the temperature increase at high power continuous use. In fact, with a high ambiant temperature (30°C) and hilly trail, the oil temperature reaches more than 70°C fairly quickly.
This motor is simply not designed to run at this power for a long time. The copper winding is too thin, there's too much joule losses. The only way to decrease theses losses is to increase the voltage (and lowering the max amp). This is why I recommend to everyone wanting maximum power to use a 14S battery. AZUR have done 500km with a 15S battery without killing the controller.
There could be ways of increasing further the continuous power of the TSDZ2 :
- Remplacing all the magnets with better temperature grade. I don't know if it's possible.
and/or
- Building a oil cooling circuit with a pump and a radiator ? :lol:
But at this point, it would be better to buy a Bafang...
Also, I choose engine oil because I had some on hand but there could be better suited and specific oil, with higher thermal conductivity. Engine oil have a TC of 0.15 W/m/K and silicone oil is 0.6 W/m/K
Regarding the leak, it's small but enough to make a mess when riding a dusty trail
However, I did not take any measure to avoid the leak. There are holes (exemple : for the torque sensor wires) that can be filled with silicone and it might avoid the leak. I'm too lazy now to reopen the case and clean everything, I will do that later :lol:
In conclusion, you are not at risk to test the solution but it needs some improvements.
The motor and the controller run just fine, and the TSDZ2 is quieter, the lubrication must be better !
When I touch the case after a ride, it's very hot but this means that the heat dissipation is better.
As I said before, it doesn't avoid the temperature increase at high power continuous use. In fact, with a high ambiant temperature (30°C) and hilly trail, the oil temperature reaches more than 70°C fairly quickly.
This motor is simply not designed to run at this power for a long time. The copper winding is too thin, there's too much joule losses. The only way to decrease theses losses is to increase the voltage (and lowering the max amp). This is why I recommend to everyone wanting maximum power to use a 14S battery. AZUR have done 500km with a 15S battery without killing the controller.
There could be ways of increasing further the continuous power of the TSDZ2 :
- Remplacing all the magnets with better temperature grade. I don't know if it's possible.
and/or
- Building a oil cooling circuit with a pump and a radiator ? :lol:
But at this point, it would be better to buy a Bafang...
Also, I choose engine oil because I had some on hand but there could be better suited and specific oil, with higher thermal conductivity. Engine oil have a TC of 0.15 W/m/K and silicone oil is 0.6 W/m/K
Regarding the leak, it's small but enough to make a mess when riding a dusty trail
However, I did not take any measure to avoid the leak. There are holes (exemple : for the torque sensor wires) that can be filled with silicone and it might avoid the leak. I'm too lazy now to reopen the case and clean everything, I will do that later :lol:
In conclusion, you are not at risk to test the solution but it needs some improvements.