3 phase switch relactance motor

Click For Summary

Discussion Overview

The discussion revolves around controlling a three-phase switched reluctance motor (SRM) using power electronics, specifically focusing on the circuit design involving MOSFETs and other components. The scope includes circuit diagram design and the configuration of components for effective motor control.

Discussion Character

  • Technical explanation, Homework-related, Experimental/applied

Main Points Raised

  • One participant is working on a project involving a three-phase switched reluctance motor and is inquiring about necessary components for a circuit diagram.
  • Another participant suggests that controlling a three-phase motor typically requires at least four MOSFETs, with a six-switch and six-diode setup being the most common configuration.
  • The original poster clarifies that the project involves using software simulation to design driving signals for the motor, indicating that the MOSFETs will function as switches for the phases.
  • A participant emphasizes the importance of reviewing the application note linked in their response for further guidance on the circuit design.

Areas of Agreement / Disagreement

Participants express differing views on the appropriate number of MOSFETs needed for controlling the motor, indicating that there is no consensus on the optimal configuration for the circuit design.

Contextual Notes

The discussion lacks detailed specifications regarding the motor's operational requirements and the assumptions underlying the proposed circuit configurations. There are also unresolved questions about the exact role of the MOSFETs in the circuit.

Kasim
Messages
23
Reaction score
0
Hi

Im doing a project to control a 3 phase switch relactance motor using power electronics. I have choosen 3 mosfets, 2 auto couplers and 2 resistors.

1. Would there be any other devices I need ( to solder to pcb board).
2. What would the circuit digaram look like so I can solder this and test it.

Thanks
 
Engineering news on Phys.org
Hello Kasim - welcome.

Hove you done any research on three phase switched reluctance motors? Typically you will not control a three phase with 3 switch configuration (MOSFETs) - probably needs at least 4 but 6 Sw and 6 Diode set up is most common.

http://www.freescale.com/files/product/doc/AN1932.pdf
 
Thanks for the reply.

It is group work and I have been told to do the circuit diagram. I think I've mis-writen the question previously asked.

Basically we will be using a software simulation to design the driving signals to the 3 phase srm. I am guessing the mosfets are just going to act as switches so like in the link you have provided will only switch phase a,b or c at any given time when a current is applied.

Does this make sense now ? If so how would the circuit diagram look.

Thanks again
 
Yes the MOSFETs are switches - but you did not look at the AP note I linked to.
 
Ok thanks il look at that
 

Similar threads

  • · Replies 27 ·
Replies
27
Views
1K
  • · Replies 15 ·
Replies
15
Views
2K
Replies
17
Views
3K
Replies
7
Views
3K
Replies
21
Views
3K
  • · Replies 19 ·
Replies
19
Views
4K
Replies
4
Views
4K
  • · Replies 25 ·
Replies
25
Views
6K
Replies
2
Views
5K
Replies
3
Views
2K