Officially it’s 90%. I’m still putting the data together from my rides, but it’s not seeming to be inefficient in terms of average meters gained per full charge compared to the Mahle, for example. I‘m likely to use meters gained/Wh to take into account the difference in battery capacity (290Wh TQ, 350Wh Mahle in the Gain I tested) between the systems in my comparison video, though I’ll report on the overall range in m of each system (as it applies to me) too.
Another new TQ motor: hpr40
- Thread starter Calcoaster
- Start date
Calcoaster
Well-Known Member
- Region
- USA
When Specialized rolled out the Creo2 they published this chart comparing their new motor’s efficiency with the TQ hpr50 and others. I saw a lot of room for misleading marketing hype and I asked Spec if I could see their test data and methodology. Like “rider cadence between 80 and 100”, and how that could mean one motor tested at 100 while another at 80, or one at low load and another at maximum load, different temperatures, etc. They said it’s for “internal use only”.
Then I emailed TQ and asked for their comment and I was told they prioritized quietness over efficiency but it was better than the Specialized chart showed. That sounded like an honest (perhaps incomplete) answer. So looking at the chart I assume the specialized 1.2 sl is up to 80% under ideal conditions, likely less under real world conditions. And my assumption is that the TQ 50 is less than that, but at least 65%, and that low figure is probably under the least favorable conditions. All based on my interpretation of a marketing chart with no data supporting it.
Calcoaster
Well-Known Member
- Region
- USA
Here’s another test report I came across showing the efficiency o the HPR50.
Again, just from press blurb, but TQ claim a system efficiency of 80% on the HPR50, and we know that the ‘40 has a few differences in the motor (like the lack of a second freewheel/clutch) so I guess that’s where the claimed additional 10% efficiency comes from. I’d love to know the real figures!
Not really surprising Spesh press rate their main future rival for road bike motors very low…
Not really surprising Spesh press rate their main future rival for road bike motors very low…
Calcoaster
Well-Known Member
- Region
- USA
Yes, it’s logical that the hpr40 will prove to be at least as efficient as the HPR50, likely better. Besides evolving motors, there are still gains to be made in battery technology which will increase range per battery size/weight = more miles per same physical size battery.
Wow that is great stuff! I had a long phone call with the ‘40 Product Manager at TQ last week, trying to sort out those crazy claims of their customer services person, and one of the things I also wanted to check was whether they had addressed the derating that the HPR50 was known for. She said not only had the case design changed, to allow for greater cooling, but that also the 40 produced considerably less heat as it is rated at 200w and they had seen no derating in their testing. That would up the efficiency considerably. I’ll be looking out for Testmybike’s review of that one!
Calcoaster
Well-Known Member
- Region
- USA
It’s nice to get your input and analysis, both here and on your YouTube channel! And you’re so right about the heat/efficiency connection: basic physics says less heat = better electrical/mechanical conversion. Thanks for your reviews!
mschwett
Well-Known Member
- Region
- USA
some interesting data !
90% would be pretty incredible - and quite at odds with what’s shown in the report @Calcoaster posted, which indicates much lower efficiency than a typical mid-drive!
90% would be pretty incredible - and quite at odds with what’s shown in the report @Calcoaster posted, which indicates much lower efficiency than a typical mid-drive!
Calcoaster
Well-Known Member
- Region
- USA
The testmybike site has a few other interesting articles.
www.testmybike.com
Artículos - Test My Bike
Artículos que potencian tu conocimiento. TestMyBike Analiza la Eficiencia de los Motores TQ HPR50 y Fazua Ride 60: Un Estudio de Estándares y Potencia Como ya hemos explorado en artículos anteriores, en el mundo de las bicicletas eléctricas, la eficiencia de un motor no es solo un detalle...
www.testmybike.com
Stefan Mikes
Gravel e-biker
- Region
- Europe
- City
- Mazovia, PL
IS TQ HPR 40 delivering only 200 W peak power?!
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