Velocity Reviews > VHDL > space vector modulation fpga

space vector modulation fpga

hasanabouali
Guest
Posts: n/a

 11-17-2004
i really wanna have the code written by vhdl language implement space
vector modulation i will be very very thankfull, if u get it to me be sure
i can help u in any thing related to embeded system

Neo
Guest
Posts: n/a

 11-18-2004

hasanabouali
Guest
Posts: n/a

 11-22-2004
i wanna to implement space vector modulation by FPGA
then
i control the speed of an induction motor

the problem is sin & cos in fpga
i hope any one can show me the way, i hope also there is a simulation
prog. or where can i find good papers.

Neo
Guest
Posts: n/a

 11-24-2004
"hasanabouali" <(E-Mail Removed)> wrote in message news:<(E-Mail Removed) alkaboutelectronicequipment.com>...
> i wanna to implement space vector modulation by FPGA
> then
> i control the speed of an induction motor
>
> the problem is sin & cos in fpga
> i hope any one can show me the way, i hope also there is a simulation
> prog. or where can i find good papers.

Hi,
Its not difficult, you can do that with look up tables if the
resolution requirement is not high or best go for cordic
implementation. it will converge rapidly within a few iterations. you
can check out this document, its a good ref to cordic in fpga.
http://www.andraka.com/papers.htm

hasanabouali
Guest
Posts: n/a

 11-24-2004
In the name of Allah the most merciful
Thank you zingafriend very much for answering me But what I need exactly
is:
I need to read three voltages and convert them to just two this is not a
problem
But I need to take these values and implement these equation
θ=cos-1(Vα/Vβ) & ta = U[cos() –
(3-½)sin()] & tb = 2U(3-½)sin()
this is my vision, our supervisor refuse to tell us more for now.
**I noticed that in the cordic algorithm which you told me about it
doesn't contain VHDL code.
Thank you anyway if you don't have a problem to talk to me online I will
be happy for that.
Also my e-mail http://www.velocityreviews.com/forums/(E-Mail Removed) if you want to add me to ur
messenger. IF u have any question about power electronics don't hesitate
just tell me if I can't help u I will find someone can.
urs:hasan

tesla
Guest
Posts: n/a

 11-25-2004
> But I need to take these values and implement these equation
> θ=cos-1(Vα/Vβ) & ta = U[cos() –
> (3-½)sin()] & tb = 2U(3-½)sin()

> this is my vision, our supervisor refuse to tell us more for now.
> **I noticed that in the cordic algorithm which you told me about it
> doesn't contain VHDL code.

check

http://www.opencores.org/browse.cgi/by_category

there are some cordic implementations.

"look up table" is also a good idea.

yusuf

hasanabouali
Guest
Posts: n/a

 12-07-2004
dear yusuf

thank you, i realy want the vhdl code that implement sin or cosine, i
can't understand this method.
do you have solved example which already implement cosine by cordic
urs:hasan

veiledcavalier
Junior Member
Join Date: Dec 2008
Posts: 1

 12-12-2008
Salam alikom dear hassanabouali,
i am a student working also with SVM and doing it on FPGA
i think we can exchange knowledge in Power Electronics and
SVM if u don't mind !

i sent u on mail. i'd be grateful if we co-operate.
thanks a lot

jeppe
Senior Member
Join Date: Mar 2008
Location: Denmark
Posts: 348

 12-12-2008
Hi
May be will you find this link useful - however am I still working with the problem.
http://www.jjmk.dk/MMMI/Lessons/11_C..._version_2.htm

Jeppe

balaji
Junior Member
Join Date: Feb 2009
Posts: 2

 02-22-2009
Hi friend
I just started working on the same kind of project indeed which u worked few years back. So I need ur kind suggestion in progressing further..
as of now i had found few architectures to implement SVPWM controller in FPGA..but the problem am facing now are:
1. In implementing FINDING SECTOR MODULE in FPGA, we need to perform iterative calculative comparisons to determine the reference sector.how do u transform that algorithmic flowchart into digital hardware implementable on FPGA?
2. secondly, how would I determine ta, tb applying those mathematical expressions using HDL or digital logic circuit synthesizable on FPGA?

as of now these are the two main questions bothering me..although i found many references speaking of CORDIC algorithm as one possible solution. but still i need to know how the complex mathematical expressions are evaluated using digital circuit?

kindly suggest me possible ways to implement & explain me in brief too..any one who help me out with this are also welcome.

anticipating ur kind response..

cheers & regards
balaji