servo motor voltage
servo motor voltage
(OP)
hi all
this is my 1st posting so i thought id try a question thats been bugging me for a while .and one which im in no doubt will be quite simple for the more imformed than myself (most of u i imagine).
i work in car manufacturing and the press shop within which im active (some of the time)uses various types of AC DC indution and servo motors and drives ....however could anybody explain why all of our DC motor are rated at 200V when surely (to me anyway) it would be more efficient to design motors to use rectified line voltage .....anyone who can throw any light my way i thank you in advance
this is my 1st posting so i thought id try a question thats been bugging me for a while .and one which im in no doubt will be quite simple for the more imformed than myself (most of u i imagine).
i work in car manufacturing and the press shop within which im active (some of the time)uses various types of AC DC indution and servo motors and drives ....however could anybody explain why all of our DC motor are rated at 200V when surely (to me anyway) it would be more efficient to design motors to use rectified line voltage .....anyone who can throw any light my way i thank you in advance





RE: servo motor voltage
While there certainly are 90 VDC motors that I am familiar with for smaller servo units, which are supplied DC from rectified line voltage, the HP or torque requirements often drive the same types of devices to 180 VDC motors, rectified, of course, from higher voltage AC voltage.
Maybe this is what is driving your situation.
I can't give you the HP threshold where the shift has to be made, but I am sure there are guru on this forum who can.
rmw
RE: servo motor voltage
RE: servo motor voltage
The voltage produced by the servo drive may be more than the "standard" voltage you would expect from just a full wave bridge.
There have been several really great past threads on PWM (pulse width modulation)control which you could probably search here or do a search on the web.
Barry1961
RE: servo motor voltage
i think i have worded my question somewhat babdly tho so here goes hope this gives clearer indication of what im trying to ask
line voltage is around 415 vac so 3 phase ac motors r designed to run at 415 ....so why are dc motors rated at 200 and 90vdc .i imagine it has somethimg to do with the way in they are designed but cant understand why its mainly those two voltages...hope thats a bit clearer....sorry
RE: servo motor voltage
Industrial size DC motors recommended voltages are 240, 500 and 550. It is assumed that the primary power source is Three-phase.
My opinion is that you allow some margins for variable speed control.
RE: servo motor voltage
RE: servo motor voltage