TQ Motor efficiency test

[Calcoaster]

I came across this site that tests e-bike motors. Their most comprehensive test is of the TQ HPR50 and it’s pretty interesting. Their most comprehensive tests were all done at the highest setting and thermal throttling was an issue that the test shows well. They tested with 150 watts rider input, full turbo mode, and with 300 and again 400 watts of resistance (their dyno to simulate hills). I found another article on their site that compared the Fazua 60 motor with the TQ in terms of efficiency. This time they tested them at different power levels and the TQ seems to average around 60% efficiency, motor mechanical output/electrical power. here’s the first TQ test article:

https://www.testmybike.com/public_html/wp-content/uploads/2023/10/INFORME_TQ_HPR50_EN_HI.pdf

 

[stompandgo]

Great stuff, there. I have never heard of the Maxon motor, or which manufacturers use it.

 

[Stefan Mikes]

This time they tested them at different power levels and the TQ seems to average around 60% efficiency, motor mechanical output/electrical power.

That low? Specialized SL 1.1 motor has the efficiency of around 79%, a proven thing.

 

[Calcoaster]

That low? Specialized SL 1.1 motor has the efficiency of around 79%, a proven thing.

Yes, it varied from 58 to 69 percent depending on power. Seemed to be best at around 200-300 watts. It’s a little confusing because they talk about electrical power as an output so I assume that’s battery power output, which I would call motor electrical input. And they explain how peak power can be much higher than the rated output. I’m translating from Spanish so that could explain some of the confusion.
TQ did say their updated hpr60 is more efficient.

 

[stompandgo]

Hopefully, the HPR 60 has better thermal management. This is where DJI shines. Bosch does a good job with it, but not great.

 

[Calcoaster]

Hopefully, the HPR 60 has better thermal management. This is where DJI shines. Bosch does a good job with it, but not great.

Yeah, they claim to have resolved the thermal throttling issues. The hpr60 motor looks the same except it has fins on the bottom for cooling. I have never had a problem with my HPR50 but very rarely use more that half its available power output.