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Member For: 8 months, 3 weeks
Posts: 2

Member of: Visualsizer Forum.
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Recent Posts by eric1:

Re: Regarding servo motor calculation

February 12, 2009 by eric1

dharmaraj,

Here's how I would do it the quick and dirty way...
1 hp = 746 W, approx.
Most servo manufacturers list rated power in Watts for their motors, so start with a servo motor around 750 W.
Note the speed you're running your AC motor at now and make sure this falls in line with rated speed of the servo motor.  Also check the rotor inertias of the AC motor versus the servo motor.  If there's more than a 2:1 difference, find a servo motor with a larger rotor inertia that falls closer in line with your AC motor.

For a more accurate sizing use VisualSizer to model your application - including load and move profile - and use the 750 W motor above as your starting point for the motor in the model.

Regards,
eric1

Re: Units conversion problem

February 12, 2009 by eric1

Wilfried,

I have also corresponded with you about this factor-of-10 inertia unit conversion problem in the past.  I just downloaded version 5.80.050 today and still the see conversion problem, even when I start an application from scratch.

Before installing version .050 I uninstalled version .040 through the Windows Add/Remove Programs function.  Are there additional files I need to delete or uninstall that might be causing this problem to linger?

In the last email you sent me (Feb 4, 2009) you mentioned the next released version would fix this problem.  Maybe .050 is not that version?

Thanks as always,
Eric Rice
Sr. Application Engineer
Applied Motion Products