Calculation of induction heating setup power consumption

Click For Summary

Discussion Overview

The discussion revolves around calculating the total power consumption of an induction heating setup, specifically focusing on the contributions from hysteresis, eddy currents, and anomalous losses. Participants explore different definitions and calculations related to input power and resistance in the context of inductive heating.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant questions whether the total power consumption can be expressed as P_total = P_by_Hysteresis + P_by_EddyCurrent + P_Anomalous_loss.
  • Another participant seeks clarification on how to quantify the Anomalous_loss term.
  • There is a reference to a DOI that defines input power (Pin) and its relevance to the discussion.
  • A participant expresses confusion over differing definitions of input power in two references, questioning whether both can be correct regarding the voltage and current used in calculations.
  • One participant provides a formula for electrical power, emphasizing the relationship between current, voltage, and resistance, and notes the variability of inductance based on the material placed in the coil.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the definitions and calculations of power consumption in the induction heating setup. Multiple competing views remain regarding the interpretation of input power and the contributions of different loss mechanisms.

Contextual Notes

There are unresolved questions regarding the definitions of voltage and current in different references, as well as the general way of defining P_rest. The discussion highlights dependencies on specific assumptions and the context of the calculations.

hxianc
Messages
3
Reaction score
0
TL;DR
This thread is for asking for help from professionals about opinions regarding the calculation of total power consumption of an induction heating setup (solenoid structure)
Hi everyone!
I am trying to calculate the total power consumption of an induction heating setup, where ferromagnetic material is placed inside a conductive coil-formed solenoid, and alternating current is passed through the solenoid by a certain power supplier.
My questions are:
1. Under such circumstances, will the total power consumption P_total = P_by_Hysteresis+P_by_EddyCurrent+P_Anomalous_loss?
2. How to quantify the Anomalous_loss term?
Any suggestion would be appreciated!
 
Engineering news on Phys.org
Welcome to PF.

Can you post links to the reading you've been doing about inductive heating so far? Thanks.
 
berkeman said:
Welcome to PF.

Can you post links to the reading you've been doing about inductive heating so far? Thanks.
Thanks for replying. Please check the following DOI: https://doi.org/10.1016/j.cattod.2019.05.005. There is a Pin defined on page 3.
 
hxianc said:
Please check the following DOI: https://doi.org/10.1016/j.cattod.2019.05.005. There is a Pin defined on page 3.
I didn't try to download the full PDF (paywall?), but the summary of the input power looks reasonable to me:

1736803124917.png
 
berkeman said:
I didn't try to download the full PDF (paywall?), but the summary of the input power looks reasonable to me:

View attachment 355801
Thank you for your quick response and confirmation. Sorry for the reference confusion, I was referring to the equation in "Modelling" section.
I have two follow-up questions that:
1. please see the attached material from another reference2(https://doi.org/10.1016/j.cej.2023.147205) In their paper they define P_in = P_reaction+P_elec+P_surrounding which is similar to reference1. However, reference2 calculates P_in by P_in=IV of the power supplier (Ohm's law), which is used in reference1 for the calculation of P_coil (eddy current conduction loss). I am confused are they both right that V,I (R) in the two references are different(reference1 refers to VI(R) of solenoid in induction setup and reference2 refers to VI(R) of power supplier) or one of the definitions is wrong?
2. Is there a general way of defining the P_rest?
 

Attachments

Electrical power is equal to the product of current and voltage: P =UxI. You know the supply voltage. The question boils down to determining the current strength in the circuit. The current in the circuit is equal to the ratio of voltage to resistance: I=U/Z, where Z is the total resistance, which is defined as the sum of active resistance and inductive resistance: Z=R+XL. The active resistance R of the circuit can be measured or calculated by the length, cross-section and material of the wire. Inductive resistance XL = 2nfL, where N = 3.14, f is the mains frequency, and L is the circuit inductance. It is important to keep in mind that the inductance of your circuit will vary, as a unique body is introduced into the coil each time
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 51 ·
2
Replies
51
Views
4K
  • · Replies 5 ·
Replies
5
Views
4K
Replies
3
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 17 ·
Replies
17
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 23 ·
Replies
23
Views
8K
  • · Replies 1 ·
Replies
1
Views
3K