How to design a 3 phase induction motor

Click For Summary

Homework Help Overview

The discussion revolves around the design of a three-phase induction motor for a project related to electrical engineering, specifically for a soot blower arrangement. The original poster is seeking assistance in determining the load and load torque on the motor, having already calculated rotor parameters, losses, and efficiency.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the need to calculate work done per unit time to find the load on the motor, suggesting factors such as the speed and volume of the cleansing media. There is a clarification that the cleansing media is steam, not air, prompting further questions about the motor's function and setup.

Discussion Status

The discussion is ongoing, with some participants providing guidance on calculating power and torque based on the motor's application. However, there is a lack of explicit consensus on the specific setup and requirements for the motor's design, indicating that further clarification is needed.

Contextual Notes

Participants note the absence of a fan in the setup, which alters the approach to calculating load and torque. The original poster has not provided detailed information about the motor's specific function, which may affect the analysis.

copresh1
Messages
29
Reaction score
0
I am trying to do a project on electrical engineering which involves design of electrical circuitry for a soot blower arrangement.i am having problems in designing a motor( 3phase induction motor). i know how to calculate the rotor parameters,losses, efficiency,etc. i am told that i have to find the load and load torque on the motor. how do i do that and how i proceed from there?.i would appreciate if anyone can help me in this.
 
Physics news on Phys.org
copresh1 said:
I am trying to do a project on electrical engineering which involves design of electrical circuitry for a soot blower arrangement.i am having problems in designing a motor( 3phase induction motor). i know how to calculate the rotor parameters,losses, efficiency,etc. i am told that i have to find the load and load torque on the motor. how do i do that and how i proceed from there?.i would appreciate if anyone can help me in this.
To find the load on the motor (it doesn't matter what kind of motor it is) you need to find the work done per unit time. In this case, it is the work done in blowing soot, I should think. Determine the pitch and speed of the fan and the volume (and mass) of air/soot it moves per rotation. From that you can determine the force x distance / time = power.

To produce that power, you will need to factor in the efficiency of an electric motor, which is typically 75-80%.

The torque of the motor will depend on how it is connected to the load. If it is directly connected (same speed as fan) the torque is related to the fan speed:
[tex]Power = \tau\omega = 2\pi\tau f[/tex] where f is the speed in revolutions per unit time

AM
 
Last edited:
there is no fan invovled here( sorry i shud have mentioned)the cleansing media is steam and directed directly from a steam manifold.how do i go ahead?
 
copresh1 said:
there is no fan invovled here( sorry i shud have mentioned)the cleansing media is steam and directed directly from a steam manifold.how do i go ahead?
You have not told us what the motor does. You have to figure out what work the motor is doing per unit time. If you can describe the set-up we might be able to help you.

AM
 

Similar threads

  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 7 ·
Replies
7
Views
2K
Replies
2
Views
5K
  • · Replies 10 ·
Replies
10
Views
3K
Replies
4
Views
4K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 27 ·
Replies
27
Views
1K
  • · Replies 9 ·
Replies
9
Views
4K
Replies
4
Views
3K