FAQ – TQ E-Bike

Below we have briefly and concisely summarized the answers to many frequently asked questions (FAQ). The answers are arranged according to topics and products. If your question is not listed, please feel free to contact us directly at any time.

Are 50 Nm really enough?

YES! We use the energy as efficiently as possible, so we don’t need an excessive amount of Newton meters. Our TQ-HPR50 drive system supports exactly as much as necessary and exactly where you need it and it is virtually invisible. With this minimum weight and integration space we are providing an uncompromised riding experience. You decide how you want to ride it. With the 50 Nm you will ride your e-bike just like an analog bike but more, further, higher…

How can the TQ-HPR50 reach its torque within such a small space?

The trick is our patented harmonic pin-ring transmission. In most commonly used e-bike motors, power is transmitted through respective cog wheels where only few touchpoints are engaged at a time, while the rest of the gears are usually not engaged at all. This results in a less efficient and indirect power transmission. This kind of gearbox usually takes most of the space in mid-mounted motors.
With the harmonic pin-ring gear, all teeth of the gear are engaged at the same time and are used for power transmission. As a result, the gearbox can be designed much more compactly and still easily reproduce the necessary reduction ratio (currently 1:17.5) in just one gear stage. With standard transmissions, this requires comparatively more space and gear stages.

Are there any other comparable transmissions?

No. In robotics, there are similar rotationally symmetrical transmissions, also with low gear ratio (e.g. cycloidal or harmonic gears). However, their use always implies at least one or more limitations such as:

a. Significantly lower efficiency
b. Non or only small hollow shaft (otherwise usable installation space around the central axis)
c. Wide axial design
d. High cost

The harmonic pin-ring transmission developed by TQ is not subject to these limitations.

How efficient is the TQ-HPR50 drive unit?

The electric motor in the TQ drive unit was designed specifically for its intended application and achieves an efficiency of more than 90%. The optimized coordination of drive unit, battery management system and power sensor technology allows for maximum yield of the battery capacity. However, the efficiency of the drive unit is only one link in the efficiency chain. The efficiency of the overall system, consisting of all components such as the drive unit, battery and their software, is much more decisive for the range that can be experienced. The entire software and hardware of the HPR50 system were completely developed and produced by TQ, so we can ensure that all components are optimally matched and thus a very high system efficiency is ensured.

Do I have to pedal the e-bike motor when riding without motor support?

No. When riding without motor assistance, the HPR50-equipped e-bike behaves like an analog bike. The reason for that are specifically developed freewheel sprags which completely disengage from the whole motor and transmission.

How do we create the natural riding experience?

Instead of the using a commonly applied torque sensor, we’ve redesigned and patented our own force sensor. It measures the input variables: crank speed, crank acceleration and the forces of both pedal cranks independently. A specially developed algorithm uses this to control the motor and, in addition to seamless response, also enables the natural riding experience.

On top of that the new force sensor now takes up even less installation space and weight.

Are third-party chargers safe to use?

Our active charger communicates with the battery during the entire charging process. While doing that, it also checks various factors such as cell parameters, ambient temperature and many more. This allows us to optimize charging times and at the same time we can charge in a highly battery-friendly way. However, this also means that currently our batteries may only be charged with the respective TQ charger and no third party charger.

What is the capacity of the battery?

The TQ-HPR50 e-bike system includes 360 Wh – and that’s enough! As we mentioned before, our system is the lightest and most efficient one within its class. Therefore we simply need less energy which also means less weight.

Can you increase the TQ e-bike systems battery capacity?

Yeah – with our range extender which weighs only 950 g you can add another 160 Wh. The range extender is as small and light as a full water bottle and fits perfectly in the specifically designed bottle cage. So nothing stands in the way of your extra-long e-bike rides.

How does the charging process work when the range extender is installed?

It is very easy. You just keep the range extender connected to the charge port of the bike and plug the charger straight into the range extender. Our software detects the range extender and then starts the charging process. However, the main battery will always be recharged first and then comes the range extender. This way you can always start your ride with a full main battery and leave the empty range extender at home in case you did not have not enough time to charge both.

How long does it take to charge the main battery?

It takes about 2-3 hours to charge the internal battery for the TQ-HPR50 e-bike system and to get ready for your next adventure.

What is the range of the TQ-HPR50 e-bike system?

The range mainly depends on the following factors:

  • What kind of terrain you are riding on
  • The level of assistance you are using
  • The total weight you are carrying
  • External factors such a temperature

Our software accounts for these and many other factors and calculates the remaining battery range based on your specific rider profile. This is then shown on your fully integrated display and constantly updated.

Example: 

Our 75 kg test rider has already climbed 1,200 hm and ridden 50 km in the steepest terrain at the highest support level. On flat terrain and with less support, however, he has also managed to ride more than 100 km.

Can I connect my smartphone with the TQ-HPR50 equipped bike?

Yes, via ANT+ you can connect your bike, like any other sensor with the bike computer or with ANT+ compatible watches. In addition, you can connect your bike via Bluetooth with the TQ E-Bike app and thus you can customize motor tuning, for example. 

Contact

Please contact us if you need information about TQ E-Bike, products or services.

 

*By submitting a request, you have taken note of the data protection information and agree to the use of your personal data within the parameters of these conditions.

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