On average a delimiter will push the motor harder than without. Wind resistance is a huge factor in affecting the duration of peak output.
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No this is false. First of all peak output in general refers to the maximum possible output of the device whether it is a speaker or an electric motor. This power is not guaranteed to be sustained continuously under normal conditions(normal conditions are defined by the manufacturer) but it can be sustained in bursts when the device is capable of doing so. The power that can be sustained continuously is "Nominal power" which the device should be able to output for longer periods under normal conditions.
Well designed electrical motors have protective measures that take into account several sensors' data like temperature to regulate the time for peak power. Basically your motor will output 600W as long as the temperature is below a certain threshold, the amp draw is within certain limits, battery is not stressed etc. When these variables are beyond the limits the speed controller simply decreases the power output until they are back to sustainable values.
In a well designed device, only the relevant information is monitored for the protection circuitry. In a mid drive system the speed of the vehicle is determined by the cadence(rpm at the motor) plus mechanical conversion parameters such as gearing and wheel size. The mechanical conversion parameters are completely independent of the electrical system parameters hence for protective circuitry, there is no information that can be had from the "speed" variable when you already have the rpm/cadence information.
One may speculate that the manufacturer is relying on the rider not to push the product. Even if this is the case, limiting speed will not achieve this. As I mentioned many times earlier even with 15mph limit, the motor can be stressed just as much if not more by mountain biking and climbing hills (these climbs can be very long) while having the maximum assist(this actually puts more stress on the motor compared to high speed rides, since at lower speeds the airflow is less hence the motor will not be cooled as well). Of course if the company is relying on limiting speed instead of proper protective measures that is really bad design on its part. Bosch is too good of a company to make this kind of bad design decision.
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The HS models =may= have higher rated discrete components than the non-HS (maybe military/aerospace spec or automotive spec vs industrial spec) so that they can handle higher temperatures for longer. There may be different heat dissipation techniques employed in the HS models. There may be more expensive higher grade greases involved, there may be higher grade insulation on the copper strands of the motor windings. Who knows for sure?
Yes, they may be the same, they may also not.
Now this may be true but it has nothing to do with the speed limit. Bosch rates HS motors
350W NOMINAL while the CX is rated at
250W. This may indicate that HS may have better internals to cope with the heat and sustain 100W more continuously. I actually asked this on the forums but no one seems to know the actual technical data.
However
when you bypass the speed limit on your CX it will NOT make it a 350w nominal motor! It will still output 250W continuously but you will have the support beyond the speed limit. On the other hand if this technical data is correct, the HS motor will keep on pushing 350W all the way up to 28mph.
What this means is if both motors are pushed to the point that they can not sustain their peak power, CX will decrease the power to 250W while HS will be able to keep it at 350W and will be faster.
