Electric Motors

Hi...

I need to know about the efficiency of 3 phase electric motor where i have only input voltage,current,frequency & rpm.

What is the formula to find the efficiency?


asked 12/14/2016
Manick2
Manick

3 Answers

an electric motor is an electrical machine thats convert electrical energy to mechanical energy most electric motors  operate through the interaction between the motors magnetic field and winding currents to generate force in the form of rotation
answered 4 months ago rajkishor 2
rajkishor

E(efficiency)
Po(power out)
Pi(power in)

E=Po/Pi
thus, if you have the rating of the power delivered you just divide it and get your efficiency 

OR can use the following 

E=(746*HP)/[(746*HP)+(watts lost)] Where 746 is a constant and HP=horsepower

just my two humble cents, hope this helps
Regards

answered 9/21/2018 Expeditions Conquistador 2
Expeditions Conquistador
i think by using the relation of the losses so we can find the losses and subtract the losses we get output .
i think it is correct .we can get an appropriate efficiency. if wrong forgive me sir .
and please tell me the solution sir.
thank you
answered 12/30/2016 Thulasi 2
Thulasi

Your Answer

In order to provide an answer to this question, you must Login

I am flagging this question because...




10 inform moderator flags remaining

I am deleting this question because...




I am flagging this answer because...




10 inform moderator flags remaining

Flagging a Post

You have already flagged this post. Clicking "Remove Flag" below will remove your flag, thus reducing the count by one as well.

I am deleting this answer because...





Software Usage Guidelines

Using software in our  work is essential for most of us and we are becoming even more dependant on it's use.  While software is a great asset, many times...

IEC Document Designation

Often document control is dictated by project requirements, for example a particular organisation may have an existing numbering system. Existing company...

Voltage Levels – Confused?

I was having a conversation the other day about voltage levels.  While everyone was in agreement that low voltage was 1000 V and less, there was more confusion...

GE's Shingijutsu Factory

GE's latest thinking on product manufacturing is he Shingijutsu philosophy or Lean production system. They have started applying this at the Louisville...

The ac resistance of conductors

In a previous article I looked at the dc resistance of conductors and in this article we turn our attention to ac resistance. If you have not read the...

Large Hadron Collider

The 27 km, Euro 6 billion  Collider lies on the border between France and Switzerland, took nearly 30 years to complete.  Some of the lofty goals for the...

Lead us, Warleader

Delum, who had watched all in silence, his face empty of expression, now spoke in turn. ' "Lead us, Warleader, into glory."' Reading is something I do...

Introduction to Cathodic Protection

If two dissimilar metals are touching and an external conducting path exists, corrosion of one the metals can take place.  Moisture or other materials...

ANSI (IEEE) Protective Device Numbering

The widely used United Sates standard ANSI/IEEE C37.2 'Electrical Power System Device Function Numbers, Acronyms, and Contact Designations' deals with...

Dielectric loss in cables

Dielectrics (insulating materials for example) when subjected to a varying electric field, will have some energy loss.   The varying electric field causes...

Our website uses cookies so that we can provide a better experience.
To learn more about what cookies are and how to manage them visit AboutCookies.org