Hi Sandun, I really appreciate the time and dedication you put into this video's. I have followed all of them and I have a much better understanding of the topic, thank you for this! I was wondering could you tell me where I can find the video where you explain how to design the DC_Motor_Speed_Controller at 3:08? Thank you for your help! Mitchell
Hi Mitchell, Thank you! I believe I'm referring to this one. th-cam.com/video/d54R3IOVkP8/w-d-xo.html There are number of other topics in the playlist named "Electric Machine Control". If you are looking for a more thorough design, I would follow phase and gain margin approaches for speed control rather than a simple PI based design. Best,
Hi Sandun, in the Dc_Motor_Speed_Controller block, I don't understand what the Ia_ref refers to. Is it the reference for one stator current of the pmsm?
Hi Sandun, Firstly thankyou for your videos, they are really helpful. I was wondering if you could do a video on how to attenuate DC link voltage when the converter is operating in regeneration for a synchronous machine. That is; how do we make sure that during this type of operation the DC link does not go up too high, but rather saturates at a certain point. Thanks again! Doron
Hi Sandun, I hope you are doing well. I was just wondering if you have given this idea any more thoughts? I've been going over the literature and this seems to be a topic that hasn't been adequately explored. I'm thinking of perhaps characterising the converter and machine in a way where I send multiple negative q axis current commands in simulation at multiple speeds and see characteristically how the DC bus voltage behaves.I could then plot a curve limiter as a function of these two variables. This is quite a crude method and I'm sure there's a better way of going about it. If you want my email it is: s3544386@student.rmit.edu.au Kindest regards, Doron Lolatgis
Hi prof ! is the DC motor in this video is a SENSOR or a RESISTANT CHARGE ? or what is it please ? the reason for my question is , you have give the SPEED_ref to DC motor and not the Synchnrone one ... e ...
Hello Sir, I didn't find the Tem formula that you created with torque_no_test block. I have looked Introduction to Modern Analysis of Electric Machines and Drives by Paul C. Krause. Can you give more reference about it ? Thanks a lot Emin
Hi Prof, Is it possible to do with AC Dyno as well? It will be useful to know how we can load the converter with AC dyno and see the dynamic response of converter when there is step change in the load?
You could do that, but that would take a little bit longer to run the simulation. The AC machine would act as a generator. The AC dyno will be in speed control mode if the PMSM is in torque control mode and vice versa.
Torque reference is based on the torque needed by the application. Here only the current references are set to achieve a certain amount of torque. Torque reference calculation will be a different video later.
Thank you very much for making these lecture series. This is very helpful to me for understanding. I'm stuck in one area. I have used eq. for Tem block Tem=(3/2)(p/2)(Lamba_m_r*iqs_r + (Ld-Lq)*iqs_r*ids_r). But I don't get the desired results. Is this correct? Please reply to me as soon as possible.
Hi, I have watched that video, I am controlling a PMSM with Ld and La=2.4mH and Rs =0.369ohms, can you please tell that how can I calculate the bandwidth for these parameters??
Hi Sandun,
I really appreciate the time and dedication you put into this video's. I have followed all of them and I have a much better understanding of the topic, thank you for this! I was wondering could you tell me where I can find the video where you explain how to design the DC_Motor_Speed_Controller at 3:08?
Thank you for your help!
Mitchell
Hi Mitchell,
Thank you! I believe I'm referring to this one.
th-cam.com/video/d54R3IOVkP8/w-d-xo.html
There are number of other topics in the playlist named "Electric Machine Control". If you are looking for a more thorough design, I would follow phase and gain margin approaches for speed control rather than a simple PI based design.
Best,
@@SandunKuruppu Thank you for your answer, your help is really appreciated!
Which is tat block you used for PI?
Can you specify the time stamp?
Transfer Function block
Hello professor. Can you guide me how Tem is calculated from ia ib and ic and theta
Please refer to the textbook information I have provided!
Hi Sandun,
in the Dc_Motor_Speed_Controller block, I don't understand what the Ia_ref refers to. Is it the reference for one stator current of the pmsm?
That is the DC dyno motor current.
@@SandunKuruppu thank you
Hi Sandun,
Firstly thankyou for your videos, they are really helpful.
I was wondering if you could do a video on how to attenuate DC link voltage when the converter is operating in regeneration for a synchronous machine. That is; how do we make sure that during this type of operation the DC link does not go up too high, but rather saturates at a certain point.
Thanks again!
Doron
Hi Doron, I will add this to the list of topics I'm planning to create videos on. Thanks!
@@SandunKuruppu
Hi Sandun,
Thank you so much! I look forward to watching the video.
Doron - from RMIT (Melbourne)
Hi Sandun,
I hope you are doing well.
I was just wondering if you have given this idea any more thoughts? I've been going over the literature and this seems to be a topic that hasn't been adequately explored.
I'm thinking of perhaps characterising the converter and machine in a way where I send multiple negative q axis current commands in simulation at multiple speeds and see characteristically how the DC bus voltage behaves.I could then plot a curve limiter as a function of these two variables. This is quite a crude method and I'm sure there's a better way of going about it.
If you want my email it is: s3544386@student.rmit.edu.au
Kindest regards,
Doron Lolatgis
@@doronlola1763 I saw a comment from you about a different question, but I cant seem to find it. Feel free to email me if you have questions.
Hi prof ! is the DC motor in this video is a SENSOR or a RESISTANT CHARGE ? or what is it please ?
the reason for my question is , you have give the SPEED_ref to DC motor and not the Synchnrone one ... e ...
Your question is not clear. Sensor or Resistant Charge? What does that mean?
Hello Sir, I didn't find the Tem formula that you created with torque_no_test block. I have looked Introduction to Modern Analysis of Electric Machines and Drives by Paul C. Krause. Can you give more reference about it ?
Thanks a lot
Emin
I figured it out. Analysis of Electric Machinery and Drive Systems (2nd Edition) page. 263 equation 6.2-6
Great!
I think you figured this one out.
Hi Prof, Is it possible to do with AC Dyno as well? It will be useful to know how we can load the converter with AC dyno and see the dynamic response of converter when there is step change in the load?
You could do that, but that would take a little bit longer to run the simulation. The AC machine would act as a generator. The AC dyno will be in speed control mode if the PMSM is in torque control mode and vice versa.
Can you please tell that how can we find reference torque from reference speed??
Torque reference is based on the torque needed by the application. Here only the current references are set to achieve a certain amount of torque. Torque reference calculation will be a different video later.
I dont understand why we substract Tem ? , do we think pmsm tem as a load for dc dyno ?
Can you specify the time stamp?
@@SandunKuruppu 4:16
@@bilgeaydos5629 Ah, that is for the mechanical dynamics. For the DC motor, Tem is a load torque. That is why.
@@SandunKuruppu Thank you sir , ı appreciated that you can share your knowledge us
Thank you very much for making these lecture series. This is very helpful to me for understanding.
I'm stuck in one area. I have used eq. for Tem block Tem=(3/2)(p/2)(Lamba_m_r*iqs_r + (Ld-Lq)*iqs_r*ids_r). But I don't get the desired results. Is this correct? Please reply to me as soon as possible.
Yes, it is correct. Are you comparing with experimental data? If so, make sure the sensor calibration is correct.
Hi, can you please explain the bandwidth speed of pi controller??
Hi Sadaf, I have explained this in this video. th-cam.com/video/d54R3IOVkP8/w-d-xo.html
Hi, I have watched that video, I am controlling a PMSM with Ld and La=2.4mH and Rs =0.369ohms, can you please tell that how can I calculate the bandwidth for these parameters??
Hi Sadaf, You can see it in this video.
th-cam.com/video/d54R3IOVkP8/w-d-xo.html