800hz would be the frequency if counting poles as pole pairs, no? If this is a 4-pole motor, counting both the N and S poles, and hz = rpm / 60 * poles / 2, I get 400hz.
Because there are two poles per pole pair. I am not sure that all manufacturers use the same convention. > On Sep 24, 2021, at 10:49 AM, Todd Zuercher <[email protected]> wrote: > > They cost about $6500, but that cost is about half any competitors > equivalent. (such as HSD, Omlat...) > > The motor name plate says 800hz for 24000rpm, (guess I assumed that info was > on that page I linked to.) > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > -----Original Message----- > From: Gene Heskett <[email protected]> > Sent: Friday, September 24, 2021 11:26 AM > To: [email protected] > Subject: Re: [Emc-users] VFD Recomendation > > [EXTERNAL EMAIL] Be sure links are safe. > > On Friday 24 September 2021 10:47:49 Todd Zuercher wrote: > >> Yes. >> https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. >> hsspindles.com%2Fwp-content%2Fuploads%2F2019%2F03%2Fspecs-13.pdf&d >> ata=04%7C01%7Ctoddz%40pgrahamdunn.com%7Cbcf7b99cdd484b02ab9608d97f6fc7 >> 65%7C5758544c573f47cebee96c3e0806fb43%7C0%7C0%7C637680941219090280%7CU >> nknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha >> WwiLCJXVCI6Mn0%3D%7C3000&sdata=bTAaxaFe%2B1kE2WR9jCTqyi2ILgw1x7Jzc >> wvl%2FbzBYAc%3D&reserved=0 >> > Nice chart. But doesn't mention at any place, rpms vs frequency. > I don't imagine they give that puppy away either. > > I tend to run the cheaper stuff, only having a 254 volt center tapped at > ground single phase feed at my location. > >> Todd Zuercher >> P. Graham Dunn Inc. >> 630 Henry Street >> Dalton, Ohio 44618 >> Phone: (330)828-2105ext. 2031 >> >> -----Original Message----- >> From: Gene Heskett <[email protected]> >> Sent: Friday, September 24, 2021 10:27 AM >> To: [email protected] >> Subject: Re: [Emc-users] VFD Recomendation >> >> [EXTERNAL EMAIL] Be sure links are safe. >> >> On Friday 24 September 2021 09:37:32 Todd Zuercher wrote: >>> Anyone have a recommendation for a good VFD and supplier that can >>> run a 15kw 4pole spindle at 24000rpm? >> >> Thats going to be a tough one Todd, its 10x the power of anything I >> have, and would need to get to 800 hz to run a 4 pole at 24k revs. >> >> Are you sure its a 4 pole? All of my 24k's have been 2 pole, doing 24k >> on 400 hz. 3600 on 60 hz, but needing better cooling to run that slow >> for long jobs. The one I'm running now, will be spitting steam back >> into the 5 gallon tank in an hours running at 4k. But is fine for >> longer jobs at 14k-20k with the mister on. At the higher revs, it >> never gets the tank above 36C. >> >>> Todd Zuercher >>> P. Graham Dunn >>> >>> Inc.<https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2 >>> 5 >>> 2F >>> >>> https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww. >>> pgrahamdunn.com%2F&data=04%7C01%7Ctoddz%40pgrahamdunn.com%7Cbcf7b >>> 99cdd484b02ab9608d97f6fc765%7C5758544c573f47cebee96c3e0806fb43%7C0%7C >>> 0%7C637680941219090280%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLC >>> JQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=9shskfk >>> ovi8mTo6%2BL%2BIZfMXKdYXnOIrzDwj1UoyQTRw%3D&reserved=0%2Findex.ph >>> p&data=04%7C01%7Ctoddz%40pgrahamdu >>> nn >>> .com%7C4727423beae5413ddb1008d97f67884b%7C5758544c573f47cebee96c3e08 >>> 06 >>> fb43%7C0%7C0%7C637680905784414687%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC >>> 4w >>> LjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sd >>> at >>> a=Nx%2BJRwnxdrUALX1Gr268XqM%2BcVZ49OAy2BChgj9K%2BOs%3D&reserved= >>> 0> 630 Henry Street >>> Dalton, Ohio 44618 >>> Phone: (330)828-2105ext. 2031 >>> >>> >>> _______________________________________________ >>> Emc-users mailing list >>> [email protected] >>> https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fli >>> st >>> s.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7C >>> to >>> ddz%40pgrahamdunn.com%7C4727423beae5413ddb1008d97f67884b%7C5758544c5 >>> 73 >>> f47cebee96c3e0806fb43%7C0%7C0%7C637680905784414687%7CUnknown%7CTWFpb >>> GZ >>> sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0 >>> %3 >>> D%7C3000&sdata=ZJy9nGS8vpOxvQSNzrWWYuioxOvg%2BKMmPuNAeF%2FRFaQ%3 >>> D& amp;reserved=0 >> >> -- >> "There are four boxes to be used in defense of liberty: >> soap, ballot, jury, and ammo. Please use in that order." >> -Ed Howdershelt (Author, 1940) >> If we desire respect for the law, we must first make the law >> respectable. - Louis D. Brandeis Genes Web page >> <https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgene >> slinuxbox.net%3A6309%2Fgene&data=04%7C01%7Ctoddz%40pgrahamdunn.com% >> 7C4727423beae5413ddb1008d97f67884b%7C5758544c573f47cebee96c3e0806fb43%7 >> C0%7C0%7C637680905784424735%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA >> iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=BmhVGU >> %2BBJ2YB8pm8yvDnpd4oNKOLfpVnG9qR6HPJNFo%3D&reserved=0> >> >> >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist >> s.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Ctod >> dz%40pgrahamdunn.com%7C4727423beae5413ddb1008d97f67884b%7C5758544c573f4 >> 7cebee96c3e0806fb43%7C0%7C0%7C637680905784424735%7CUnknown%7CTWFpbGZsb3 >> d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C >> 3000&sdata=g5sxcHgiurOW3VNSflYYJ6WDgKHIJu8%2FnNo7l3S4Q2Y%3D&res >> erved=0 >> >> >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist >> s.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cto >> ddz%40pgrahamdunn.com%7Cbcf7b99cdd484b02ab9608d97f6fc765%7C5758544c573 >> f47cebee96c3e0806fb43%7C0%7C0%7C637680941219100279%7CUnknown%7CTWFpbGZ >> sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3 >> D%7C3000&sdata=xblPfiQ87FDEtbrEdijFik4CvTXYFDF0SQrT%2F1zulLU%3D&am >> p;reserved=0 > > > > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > - Louis D. 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