Other Parts Discussed in Thread: DRV10983, , , DRV8353RS-EVM, DRV8353
I am looking for a sensorless BLDC motor driver for a centrifugal fan in a consumer product.
At the moment I am just trying to make a prototype demo that looks like the final product.
Power is perhaps 100W or so, speed probably between about 1000 and 4000 rpm, which would be between about 60Hz and 300Hz 3 phase frequency.
I am currently using a packaged driver and a 48V supply. It has plenty of power, and drives over the right speed range.
It will not tolerate any filtering between the driver and the motor.
The motor I am using is compact light and effective, it is ridiculously expensive, intended for a quad-copter.
The acoustic noise is dreadful, so bad that I can't use it even as a demo to marketing, even with explanations that it will improve.
I believe that the current driver uses back emf from one phase at a time to get information for commutation,
this strikes me as inherently more noisy that sensing this information from the phase currents.
I saw information about the DRV10983, claiming particularly low noise, but it doesn't have the power output.
The DRV8323 seems to have ample power (albiet with external FETS) and a very nice evaluation unit BOOSTXL-DRV8323RH.
It seems to use current sensing, not back emf sensing.
Is this the best product for me to pursue for the moment?
Once it is turned into a consumer product I'm sure there will be a new motor, but these driver parts do not seem excessively expensive, they may well persist.
