Reduce noise brushless RC motor
- Thread starter Allinone
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bobc
10 kW
The bigger motors seem to be quieter, but I've not run that many.... Inrunners cost more and run faster (so need more gearing) but should be quieter I would think.
I ran a 63mm diam outrunner for quite a few years, it was quite buzzy but I got used to it. My present bike has a 50mm diameter motor & by comparison it's embarrassingly loud. A few years ago I made a 1 wheel electric trailer with a very small motor on, 33mm diam or so, that was horrific - high pitched too...
PS other reasons for running a motor that's bigger than you need - 1) bigger motors are more efficient 2) bigger motors need less reduction gearing
both sweeping generalisations of course
A motor that's too big will still be pretty light and cheap - I just bought 2 "2kW" outrunners (190kV) for £25 ($32?) each, they weigh 670g
I ran a 63mm diam outrunner for quite a few years, it was quite buzzy but I got used to it. My present bike has a 50mm diameter motor & by comparison it's embarrassingly loud. A few years ago I made a 1 wheel electric trailer with a very small motor on, 33mm diam or so, that was horrific - high pitched too...
PS other reasons for running a motor that's bigger than you need - 1) bigger motors are more efficient 2) bigger motors need less reduction gearing
both sweeping generalisations of course
A motor that's too big will still be pretty light and cheap - I just bought 2 "2kW" outrunners (190kV) for £25 ($32?) each, they weigh 670gbobc said:The bigger motors seem to be quieter, but I've not run that many.... Inrunners cost more and run faster (so need more gearing) but should be quieter I would think.
I ran a 63mm diam outrunner for quite a few years, it was quite buzzy but I got used to it. My present bike has a 50mm diameter motor & by comparison it's embarrassingly loud. A few years ago I made a 1 wheel electric trailer with a very small motor on, 33mm diam or so, that was horrific - high pitched too...
PS other reasons for running a motor that's bigger than you need - 1) bigger motors are more efficient 2) bigger motors need less reduction gearing
both sweeping generalisations of course
Where are those motors avail?
bobc
10 kW
Here we go:
http://www.hobbyking.com/hobbyking/store/__51866__KD_53_30_High_Voltage_Brushless_Outrunner_190KV.html
I note the price is now higher than I said above at 44.5 dollars - I'll check exactly what I paid on my bill when I get home...
http://www.hobbyking.com/hobbyking/store/__51866__KD_53_30_High_Voltage_Brushless_Outrunner_190KV.html
I note the price is now higher than I said above at 44.5 dollars - I'll check exactly what I paid on my bill when I get home...
Wheazel
10 kW
Much noise in rc motors comes from the squarewave they are driven with.
I experienced this when I ran my rv120pro (like a large rc motor) with my adaptto controller.
Tried both squarewave and sinewave, and the noise difference was big.
ANd I imagine that the sound would be even worse with higher rpm (smaller motors)
My old (and now retired) rc setup of a ~1kg 150kV HK outrunner + phoenix 160 did scream like a pig.
I can not say wether it would be a good idea to run smaller rc motors on sinewave, just stating what I experienced.
I experienced this when I ran my rv120pro (like a large rc motor) with my adaptto controller.
Tried both squarewave and sinewave, and the noise difference was big.
ANd I imagine that the sound would be even worse with higher rpm (smaller motors)
My old (and now retired) rc setup of a ~1kg 150kV HK outrunner + phoenix 160 did scream like a pig.
I can not say wether it would be a good idea to run smaller rc motors on sinewave, just stating what I experienced.
bobc
10 kW
OK price for 2 motors + delivery was £66, but the delivery was by UPS who added £25 without any warning.
So I would say the motors were bought thinking they were £33 each but they turned out to be £45.50 each.
And it would have been cheaper to buy more expensive motors which are now in stock in their UK warehouse.
A lot cheaper
Thanks UPS thanks a bundle
So I would say the motors were bought thinking they were £33 each but they turned out to be £45.50 each.
And it would have been cheaper to buy more expensive motors which are now in stock in their UK warehouse.
A lot cheaper
Thanks UPS thanks a bundle
Wheazel
10 kW
rmrf said:
Great info! Thats the same motor type I had in my rc setup which was all but silent.
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