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29th Apr 2022, 07:25 PM #16Senior Member
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- Apr 2018
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- Perth
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- 168
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29th Apr 2022, 08:10 PM #17Diamond Member
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- Sep 2006
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- Australind , WA
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- 58
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- 1,281
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30th Apr 2022, 09:53 PM #18
Hi Steve,
A BLDC motor is fundamentally a three phase device and in theory could be run from a VSD. However it does use hall sensors to detect the position of the rotor with respect to the field coils. The hall sensor output is used to switch on or off the semiconductor devices used to pass power through the field coils at the right instant in time. Also by varying the time and duration of the power fed to the coils can be used to control the speed and the amount of output power the motor can produce.
HTH.Best Regards:
Baron J.
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30th Apr 2022, 10:06 PM #19Diamond Member
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- Sep 2006
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- Australind , WA
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30th Apr 2022, 10:16 PM #20Diamond Member
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- Sep 2006
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- Australind , WA
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OOoooh, look. Looks like it will work, but its a bit of work. No Problem.
https://www.youtube.com/watch?v=1oQPl-GqB0E
I searched again, but using words , instead of abreviations this time and different results came up!
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1st May 2022, 10:49 PM #21
Steven, there is no point in trying to use a VSD to run that kind of motor ! As seen in the video he has direct access to all three motor phases. Without that, it would be a sure fire way of letting the smoke out.
Its original controller would use a DC supply and the low resistance of the windings would need unknown amounts of current from that DC supply ! The supply voltage would only be switched on for a few fractions of a second for each phase of the motor windings, depending on speed and required power output. Also there may be multiple phases, more than the three you would normally expect.
HTH.Best Regards:
Baron J.
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1st May 2022, 11:43 PM #22Diamond Member
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- Sep 2006
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- Australind , WA
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2nd May 2022, 06:59 PM #23Member
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- Apr 2020
- Location
- Hackham West
- Age
- 55
- Posts
- 55
Hope you get it sorted mate
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2nd May 2022, 11:50 PM #24Diamond Member
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- Sep 2006
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- Australind , WA
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