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sara ahmed
09-13-2013 11:06 PM

Make VFD drive stepper motor

i wanna make drive circuit to drive stepper motor to give me 30 A output current can help me to make it :)
09-14-2013 01:16 AM
Top #2
Trevor de Wilde Micromech
09-14-2013 01:16 AM
We are Stepper Motor Specialists in the UK and do not know of any Stepper Motors generally available which are rated for a 30 Amp Phase current. More to the point you would be wasting a lot of power as Stepper Motors are very inefficient so to estimate just multiply your 30Amps by the working Voltage of your System . Even at 50 Volts you would waste around 1KW! Why can't you use ageared Servo Drive?
09-14-2013 04:08 AM
Top #3
Sandro Calligaro
09-14-2013 04:08 AM
If you're controlling phase current by PWM at 30A peak, dissipation will be R*I^2, which however can be quite high, depending on resistance...

Is 30A an oversized spec, i.e. N-times the max driving current?
09-14-2013 06:23 AM
Top #4
Jairo Muñiz
09-14-2013 06:23 AM
Looking for power electronics components (ICs, thyristors, power diodes, etc..) That fit the effort and flow you need and design the circuit to give you the flow you require...
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