Hi=20Steve, <Opinionated=20Rant> You've=20been=20told=20rubbish,=20solid=20state=20gives=20you=20infinite=20= control=20over speed=20(within=20the=20limits=20of=20your=20motor=20to=20cope=20with=20it= ),=20all=20a=20rotary phase=20converter=20gives=20you=20is=20an=20expensive=20space=20consuming=20= spinning transformer.=20For=20me=20I=20couldn't=20live=20without=20inverters,=20plu= s=20the=20fact that=20good=20ones=20can=20be=20had=20on=20ebay=20for=20peanuts=20while=20= atavistic=20retards pay=20silly=20money=20for=20rotaries=20is=20just=20another=20plus=20in=20t= heir=20favour </Opinionated=20Rant> I=20personally=20prefer=20inverters=20because=20of=20the=20speed=20control= ,=20you=20can individual=20ones=20on=20a=20per=20machine=20basis,=20as=20long=20as=20you= =20aren't=20going=20over about=207.5kW=20(10HP)=20then=20an=20inverter=20will=20be=20a=20lot=20chea= per.=20Also=20you don't=20have=20to=20have=20tailored=20loads=20on=20an=20inverter,=20so=20i= f=20you're=20only using=20one=20machine=20at=20a=20time=20just=20by=20one=20big=20enough=20t= o=20cope=20with=20the biggest=20thing=20you=20use=20and=20add=20some=20plugs=20or=20switches=20t= o=20change=20machines over=20and=20build=20a=20mobile=20control=20box=20to=20run=20it=20with....= Chris=20Crosskey -----Original=20Message----- From:=20modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx]=20On=20Behalf=20Of=20Sehwuk@aol.com= Sent:=2002=20February=202006=2019:52 To:=20modeleng@xxxxxxxxxxxxx Subject:=20[modeleng]=20Question=20about=20phase=20converters Chaps =20 =20=20=20=20My=20first=20post=20and=20it's=20a=20question=20for=20any=20an= d=20all=20=20to=20answer=20:-=20Has=20 anybody=20out=20there=20got,=20or=20used,=20phase=20converters=20?.=20I'm=20= just=20on=20=20the verge=20of=20 building=20the=20new=20workshop=20for=20an=20attempt=20at=20a=2041/2"=20Bu= rrell=20but=20=20will need=20bigger=20 machinery=20than=20I=20have=20at=20the=20moment,=20which=20really=20=20mea= ns=20going=20to=203 phase.=20I=20 have=20heard=20good=20and=20bad=20things=20abut=20these=20bits=20of=20kit=20= =20but=20would=20rather hear=20 from=20people=20in=20the=20know=20(as=20it=20were).=20I=20have=20definatel= y=20=20been=20told=20that a=20rotary=20 will=20be=20better=20than=20a=20solid=20state.=20ALL=20replies,=20good=20o= r=20=20bad,=20will=20be most=20 welcome. =20 Steve Bodgers=20Retreat,=20=20Burwell MODEL=20ENGINEERING=20DISCUSSION=20LIST. To=20UNSUBSCRIBE=20from=20this=20list,=20send=20a=20blank=20email=20to,=20= modeleng-request@xxxxxxxxxxxxx=20with=20the=20word=20"unsubscribe"=20in=20= the subject=20line. ________________________________________________________________________ This=20e-mail,=20and=20any=20attachment,=20is=20confidential.=20If=20you=20= have=20received=20it=20in=20error,=20do=20not=20use=20or=20disclose=20the=20= information=20in=20any=20way,=20notify=20me=20immediately,=20and=20please=20= delete=20it=20from=20your=20system. ________________________________________________________________________ MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.