Motor VFD

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I've only seen the larger 1 phase motors for augers etc in the last few years. Grain Aeration fans, a long time.

These things are hard to start. Everything needs to be maxed with as minimal startup load as possible.
I haven't encountered much for starting issues myself but yes over 10 HP single phase on other than grain aeration applications is something I haven't seen until last 10 years or so.

The grain aeriation motors were often built about like a 10 HP motor but were rated for "air over" applications, and there is some of these even in three phase versions. I'm sure you encountered all of those mentioned, just mentioning for the sake of others reading this.
 
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