Author Topic: What about using two China VFDs to drive one spindle?  (Read 1000 times)

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Offline Werner

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What about using two China VFDs to drive one spindle?
« on: December 01, 2012, 10:06:41 PM »
Hi Guys,  I just bought another China 2.2kw motor/VFD unit just to have on hand now that one of my units has been in service for so long.  I paid under $400 including shipped and it just got me thinking has anyone heard of using two of these units to drive a single spindle.  You could use a double J-section pulley belt system.  Even have it set up so that you are only using one motor with the other on standby when the HP is not needed which for me would be most of the time.  A pneumatic pressure idler pulley could be used with a cage arrangement similar to what Fadal had used on there two speed systems.  With 3-1 ratio you would end up with a 10k spindle and gob's of torque when you need it.  Just dreaming.