benjamin84
100 W
- Joined
- May 20, 2010
- Messages
- 177
This may be a silly question, but why do some e-bike motors make a lot of noise, while others are perfectly silent? Are there fundamental differences between the way these motors work, or are some motors simply tuned/built/designed more quietly with casings and bearings that cause less noise?
There is a large difference between hub motors and mid drive motors for example, where something like a QS205 hub motor like I have on my Qulbix (admittedly mid mounted) is completely silent, compared to the motor in most mid-drive kits, or even the Sur-Ron, where you hear a very audible whine every time any power is applied.
I've tried to google this and apart from finding out that some controllers (sine wave vs square wave) are quieter than others then I can't really find a clear answer to this. Please enlighten an EV-noob
There is a large difference between hub motors and mid drive motors for example, where something like a QS205 hub motor like I have on my Qulbix (admittedly mid mounted) is completely silent, compared to the motor in most mid-drive kits, or even the Sur-Ron, where you hear a very audible whine every time any power is applied.
I've tried to google this and apart from finding out that some controllers (sine wave vs square wave) are quieter than others then I can't really find a clear answer to this. Please enlighten an EV-noob