Previous in Forum: Armour Shunting of Single Core Cable   Next in Forum: KEMA Certification
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
Anonymous Poster

VFD Power Factor

02/27/2010 4:07 AM

why power factor of VFD is Unity??
Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Anonymous Poster
#1

Re: VFD Power Factor

02/27/2010 5:26 AM

VFD (if Digital) =

AC -> (Rectifier)->DC ->(Controlled inverter)->AC

Hence The input AC sees the device as ?
Reply
JRaef
Guru
United States - Member - New Member Engineering Fields - Power Engineering - New Member

Join Date: Sep 2006
Location: California, USA, where the Godless live next door to God.
Posts: 4665
Good Answers: 804
#2

Re: VFD Power Factor

02/27/2010 11:24 PM

Who is feeding you that lie about VFDs having unity PF?

__________________
 ** All I every really wanted to be, was... A LUMBERJACK!.**
Reply
Aldego
Commentator

Join Date: May 2009
Location: Centurion, South Africa
Posts: 87
Good Answers: 5
#3

Re: VFD Power Factor

03/04/2010 12:52 AM

Its not unit but between 0.97 and 0.98. Much better than a motor operating from DOL- or Soft starter anyway.

__________________
 R T F M .......
Reply
Reply to Forum Thread
Have a Different Question?
3 comments
Copy to Clipboard

Users who posted comments:

Aldego (1); Anonymous Poster (1); JRaef (1)

Previous in Forum: Armour Shunting of Single Core Cable   Next in Forum: KEMA Certification

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 (81 right now)
Show Members
Advertisement