Previous in Forum: Energy meter   Next in Forum: Busbar Selection and Ampacity
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
3 comments
Rate Comments: Nested
Abdou
Active Contributor

Join Date: Jun 2007
Location: Houston (Texas)
Posts: 23

Motor Control

11/11/2009 7:09 AM

Good morning I have a problem and would love help and advice.I put two motor 1/3 hp and control them with a Baldor driver.But when i push the start button I can hold one motor with my hand it didn't run, but I cant hold the other. Do I miss a parameters or the driver is being
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
mjb1962853
Guru
Engineering Fields - Electrical Engineering - Analog and Digital Circuit Design Engineering Fields - Electromechanical Engineering - Transformers, Motors & Drives, EM Launchers Engineering Fields - Engineering Physics - Applied Electrical, Optical, and Mechanical

Join Date: Jan 2008
Location: NY
Posts: 1207
Good Answers: 119
#1

Re: Motor Control

11/11/2009 9:13 AM

For AC motors/drives, there is a starting torque or current limit parameter. It can usually be set over 100% to get optimal starting performance. I believe one or more of the parameters is set differently between your 2 drives.

The AC drives I've used have over 60 programmable settings, several of which can affect the peak current/torque. I normally step through every parameter and write the values down for future reference. Verify that each drive has the same parameters and you should get identical motor performance.

DC drives have fewer parameters, but the same idea applies. Verify each drive has the same settings.
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
2
MalcolmK
Power-User

Join Date: Jul 2008
Location: UK
Posts: 205
Good Answers: 50
#2

Re: Motor Control

11/12/2009 4:47 PM

If I understand you correctly, they are both connected to one VFD output but one motor is not developing much torque.

If this is the case, then the motor is likely connected for a higher voltage. reconnect it to the VFD output voltage level and it should be much better. Check the nameplate for correct connection for your voltage.

Your post is not too clear so I hope this is the correct interpretation and may help

__________________
 Something new every day!
Register to Reply Good Answer (Score 2)
No more Good Answers. Go to first "Almost" Good Answer
Anonymous Poster
#3
In reply to #2

Re: Motor Control

11/13/2009 6:07 AM

Thanks Malcom. I did look all that they both are the same motor what I did yesterday is I increase the torque and it seem working good.Thank you all for your shoot.
Register to Reply
Register to Reply
Have a Different Question?
3 comments

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); MalcolmK (1); mjb1962853 (1)

Previous in Forum: Energy meter   Next in Forum: Busbar Selection and Ampacity

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (96 right now)
Show Members
Advertisement