This is a question more for the industry rather than the hobbyist but I thought I try anyway I have 3 phase 5 hp fan on 415 volt supply running in delta works OK I need to vary the speed I have a jaguar VX 400 which is 4kw 415 volt 3 phase in 3 phase out variable frequency but the motor which is 10 pole don't like it should the motor be rewired in star when running with a inverter the documentation don't cover this any suggestions
Thanks Andrew Bishop
Should be star for 440 in and out. Not got my books in front of me at the moment. Hang on - web site - Set parameter 29 to 1 - active and set parameter 30 to number of poles - 10 Try that.
-- Regards,
John Stevenson Nottingham, England.
Vary the speed ... upwards or downwards?
Bear in mind that the power required to drive a fan varies as the cube of the speed, so increasing speed is likely to be problematic.
If you're reducing it, see John's answer.
- Brian
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