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Feb 8, 2018 at 15:56 history edited user80875 CC BY-SA 3.0
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Oct 25, 2016 at 14:03 comment added Marko Buršič Yet better to use 87Hz technique, but you need a three phase VFD and a motor 230/400 star/delta. You connect it in delta, then you addapt V/f characteristics to 87Hz. With a higher reduction ratio of the gear, you can have a span of 15-87Hz operation.
Oct 23, 2016 at 14:18 history answered user80875 CC BY-SA 3.0