Previous in Forum: Resistivity of a Magnet   Next in Forum: CT Characteristics
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
nak_4104
Member

Join Date: Jul 2008
Posts: 8

Variable Frequency Drive

09/16/2010 1:05 AM

What is difference and advantage and disadvantages between VFD and Mechanical Gear Box?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
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
#1

Re: Variable freqvency drive

09/16/2010 2:34 AM

When changing speed with a gear box, torque is changed inversely to the speed change. This can provide some serious benefits in some applications. With a VFD, torque remains constant as speed is changed. Gearboxes represent a power loss, so are less efficient than VFDs. VFDs are infinitely variable, gears are not. VFDs create harmonic disturbance on the power supply, gearboxes do not. There's more, I'm just tired of it now.

__________________
 ** All I every really wanted to be, was... A LUMBERJACK!.**
Register to Reply
nak_4104
Member

Join Date: Jul 2008
Posts: 8
#2
In reply to #1

Re: Variable freqvency drive

09/16/2010 3:50 AM

thanks frnd
Register to Reply
TonyS
Guru
United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#3

Re: Variable freqvency drive

09/16/2010 4:36 AM

Do you mean a variable speed gearbox? From past experience, I'd avoid them like the plague! Inefficient and unreliable!

__________________
 The reports of my death are greatly exaggerated.
Register to Reply
Register to Reply
Have a Different Question?
3 comments
Copy to Clipboard

Users who posted comments:

JRaef (1); nak_4104 (1); TonyS (1)

Previous in Forum: Resistivity of a Magnet   Next in Forum: CT Characteristics

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 (56 right now)
Show Members
Advertisement