SiePortal

The integrated platform for your product selection, buying and support workflow - bringing together Industry Mall and Online Support.

Products & Services
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
Support Support
{{(apiData.Support | filter:{'rank':1}:true)[0].title}} Support
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
MySiePortal MySiePortal
{{(apiData.MySiePortal | filter:{'rank':1}:true)[0].title}} MySiePortal
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
Cart ({{apiData.CartCount}})

Navigation

How much current will be drawn at 25Hz with V/f linear characteristic?

9/9/2009 12:22 PM	Rate (0)
Nikolaj Posts: 11 Rating: (0)	Hello everyone! Using a V/f linear characteristic with a MM440 I assume that at 50Hz the motor will draw the nominal current with a constant torque load. What happens to the current when the frequency and voltage are reduced for example to 25Hz? Will it draw half the current? Is there any formula to calculate this?
Nikolaj Posts: 11 Rating: (0)
Suggestion To thank Quote Answer

9/10/2009 3:18 PM	Rate (0)
uel123 Gold Member Joined: 1/29/2006 Last visit: 8/16/2025 Posts: 451 Rating: (65)	Hey, Nikolaj! Theoretically, at nominal load torque, motor will draw nominal current also at 25 Hz. I propose you read the following discussion: /tf/WW/en/Posts/17746 have fun! uel123 P.S: this discussion is also very interesting! /tf/WW/en/Posts/15639#top
	Last edited by: uel123 at: 9/10/2009 3:21 PM
Suggestion To thank Quote Answer

9/11/2009 8:14 AM	Rate (0)
Nikolaj Posts: 11 Rating: (0)	Thanks uel123!!! Exactly what I was looking for!
Nikolaj Posts: 11 Rating: (0)
Suggestion To thank Quote Answer

Share this page:

Share this page on...