Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

High power motor control with power electronics devices

Status
Not open for further replies.

jean12

Advanced Member level 2
Joined
Aug 27, 2013
Messages
529
Helped
5
Reputation
12
Reaction score
6
Trophy points
18
Activity points
5,497
triac control with microcontroller

Hello,could anyone help me to control a three phase system with pic16f877a?

thank you for helping.
 

re:triac control with microcontroller

Hello,could anyone help me to control a three phase system with pic16f877a?

thank you for helping.
Hi jean12

What kind of help you exactly need ? name of your topic is
triac control with microcontroller

Hence i presume you want to know how to use triacs in there phase and how to drive them with a signal which is coming from and MCU ? right ?

If so , that's not to hard ! you've signal coming from MCU then apply it to zero crossing detector opto triac and trig em ! but you need another circuit in order to shut em down when you want !

How ever i don't recommend you using triacs for this purpose because there are more better ways ! using IGBTs or Mosfets they are much easier to do the task !


Best Wishes
Goldsmith
 

re: triac control with microcontroller

Hello,could you help me to handle this using MOSFET?Which kind of MOSFET do you advise me?Please help also the codes are very interesting.What are the component to be used for this system,I want to drive an asynchronous motor of 11KW.

Thanks.
 

Asynchronous Machine control with SV-PWM from PIC16F877A

Hello,there I am implementing a project for controlling an AC three phase asynchronous machine of 11KW ,I want to use 6 MOSFETS and do it with SPWM;could you please advise on the components and codes to use?

Thank you!!
 
Last edited by a moderator:

re: Asynchronous Machine control with SV-PWM from PIC16F877A

Hello,could you help me to handle this using MOSFET?Which kind of MOSFET do you advise me?Please help also the codes are very interesting.What are the component to be used for this system,I want to drive an asynchronous motor of 11KW.

Thanks.
Hi jean12
Of course i'll help you !
Try to search and understand how gaertz bridge based on mosfet can work ! i mean 6 mosfet in pair ! each pair will control one phase as well . (2*6)
after you understood how it works you need to design it's power circuit after that you can design control circuit .

You can simply find a lot of mosfets and IGBTs which are rated for high powers like your required power .

Best Wishes
Goldsmith
 

Re: Asynchronous Machine control with SV-PWM from PIC16F877A

for 6 IGBT making a bridge I understand how they work but my problem is to understand how a PIC16F877A will be used for providing the controlling signals the 6 Gates currents for all those MOSFET/IGBT.
that`s why I have a problem on generating those signals with PIC16F877A,help on its implementation could you help on handling that suing proteus simulation?

Thank you!!
 

Re: triac control with microcontroller

I see that you took part in a lengthy discussion about (single phase) sine PWM two years ago https://www.edaboard.com/threads/293785/

So I presume you have already basic knowledge about µC PWM generation. The additional issue here are three phase sine generation, also availability of hardware PWM resources with PIC16.

There's Microchip AN967 describing three phase motor control with a PIC16F72, it should give you at least the basic ideas. https://ww1.microchip.com/downloads/en/AppNotes/00967A.pdf

Personally I would prefer a recent motor control PIC with advanced PWM generation capabilities. I like also to add for consideration that a 11 kW VFD inverter is far beyond a simple demonstration circuit, building it requires profound power electronics knowledge and respective tools.
 

Hello,I would like to construct a dc-ac converter three phase based on IGBTs with SV-PWM I want to control the speed of a an asynchronous motor three phase 11KW,could you advise me on how I can rise the power of my system for handling big motor of those 11Kw?

The control is implemented using PIC16F1936 and the bootstrap drivers IR21365.

Please help.

Thanks
 
Last edited by a moderator:

Hi,

what voltage do you need for the motor?

There are a lot of applications and examples on how to drive a three phase motor.
You surely did go through them. Where do you see the difficulties with your project?

Klaus
 

on coding SV-PWM for controlling the six IGBTs,the motor is 220/380V,11KW.

Thank you

- - - Updated - - -

Hey, FvM could you advise on how the PIC16F72 has been codes for generating six PWM signals,referring to the Microchip tutorial?

Thank you
 

Re: triac control with microcontroller

Unfortunately,I judged AN967 incomplete for running the system,the codes looks incomplete I checked with AN889 but the sine table is not there and also the codes are incomplete,someone to help me to handle.
I created my self a sine table but don`t know how I can access it .

I placed the sine table in EEPROM and then I want to adapt it to the AN889.could you please help mehttps://ww1.microchip.com/downloads/en/AppNotes/00889b.pdf


Thanks.
 

There are asm source codes for AN889 and AN967 at microchip.com. They are complete and implement a (rather small) sine table.

Writing VFD code in assembly language is somehow outdated.
 

which technique to be used(for code writing) for controlling if writing the VFD in assembly is outdated?could you post the complete codes for AN889 here?I found some but they are not ok,some terms are lucking.!!!
 

There are asm source codes for AN889 and AN967 at microchip.com. They are complete and implement a (rather small) sine table.

Writing VFD code in assembly language is somehow outdated.

Hello,could you please help me to handle the issue.??Providing VFD code using C.

Thx
 

Hello, **broken link removed** could some body using the link above in assembly show me how the minimum frequency of 5HZ and maximum frequency of 60HZ has been calculated?I would like to control but using the minimum at 0HZ and Maximum at 40Hz,please let me know the formula in use.


Secondarly I am using PIC16F1936 but when editing the codes of AN889 from macrochip the keywords likeFSR,INDF,EXTERN are generating erros,could you please help on dealing with this?

Any body knowing the same example in ccs or MicroC can post and let us have more information,I am a beginner in assembly programming.

Please help to handle this.

Thank you!!
 

controlling a three phase motor IGBT bridge

Hello,could you please advise on how I can implement a power electronic system which takes a PIC signal and then driver an AC three phase momtor 11KW?

I was thinking on providing gate signal on the IGBTs of 15A and thinking that is enough for an AC Three phase motor of those 11KW,please help me to think on the power components to use for this system
 

Re: controlling a three phase motor IGBT bridge

3 phase BLDC I presume...you have commutation switching, from coil to coil , to make it spin, then within that you have high frequency pwm which efficiently keeps the motor current at the required level....yur pic must know at what point to commutate from one coil to the other, sometimes this is done by "sensorless" control of BLDC. But sometimes the rotor position is sensed using some kind of other method, like having hall sensors etc. So you cannot just pulse away like with a stepper motor , but you must do it at the specific instants, otherwise your motor will not spin properly.
 

Re: controlling a three phase motor IGBT bridge

The problem here is power electronics for passing that high current for this motor but also I don`t have an idea on how to shift the three signal in order to control these phases.

Please help
 

Re: Asynchronous Machine control with SV-PWM from PIC16F877A

Hello,there I am implementing a project for controlling an AC three phase asynchronous machine of 11KW ,I want to use 6 MOSFETS and do it with SPWM;could you please advise on the components and codes to use?

Thank you!!
You have a lot to learn before you can do this. And you cannot expect to find all the answers here without asking all the right questions.... dozens and dozens of them.. so start web searching then ask a better question.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top