Three phase converter
Archiver
Posts: 46,084
Hello,
I would like to design & build a three phase motor controller using a basic
stamp for
speed control. The program for creating the logic is relatively easy for me as
is the
controlling of speed. I would need the motor to run in one direction only,
therefore an
H-Bridge motor diver won't be needed. I would like to rectify the AC line to
provide a DC
supply for the operation, therefore SCR's are out. What I would like to use is
FET
Technology. Question is how due I select a module for these? What kind of
snubber would I
need? The motors need to be from 5hp to 25 HP and will be running on 220VAC.
Does anyone
know how I might go about selecting a FET control module to fit this
application? And
Also how I might go about interfacing this module to the stamp. As always
thanks for the
help of all the great guys who give such excellent hints for such matters in
this group..
Leroy
I would like to design & build a three phase motor controller using a basic
stamp for
speed control. The program for creating the logic is relatively easy for me as
is the
controlling of speed. I would need the motor to run in one direction only,
therefore an
H-Bridge motor diver won't be needed. I would like to rectify the AC line to
provide a DC
supply for the operation, therefore SCR's are out. What I would like to use is
FET
Technology. Question is how due I select a module for these? What kind of
snubber would I
need? The motors need to be from 5hp to 25 HP and will be running on 220VAC.
Does anyone
know how I might go about selecting a FET control module to fit this
application? And
Also how I might go about interfacing this module to the stamp. As always
thanks for the
help of all the great guys who give such excellent hints for such matters in
this group..
Leroy
Comments
www.ePanorama.net has some great stuff on motors and just about
everything else.
Ian
Original Message
From: Leroy Hall [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=DU7AA1Trtj1TkU2L083bZ7nTvFJls4Fn2g538Bbq7SkdYM7RplPZQJXetZsmy2X4m4o97dA7YQ]leroy@f...[/url
Sent: January 29, 2003 1:11 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Three phase converter
Hello,
I would like to design & build a three phase motor controller using a
basic stamp for
speed control. The program for creating the logic is relatively easy
for me as is the
controlling of speed. I would need the motor to run in one direction
only, therefore an
H-Bridge motor diver won't be needed. I would like to rectify the AC
line to provide a DC
supply for the operation, therefore SCR's are out. What I would like to
use is FET
Technology. Question is how due I select a module for these? What kind
of snubber would I
need? The motors need to be from 5hp to 25 HP and will be running on
220VAC. Does anyone
know how I might go about selecting a FET control module to fit this
application? And
Also how I might go about interfacing this module to the stamp. As
always thanks for the
help of all the great guys who give such excellent hints for such
matters in this group..
Leroy
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject
and Body of the message will be ignored.
Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
http://freedownload.myrice.com/im/imcu/data/dg/toshiba/dg_toshiba_011.pdf
but I can't seem to get it print past the third page before my computer hangs
up. I think
Acrobat is choking but am not sure.
Leroy
Original Message
From: "Ian Phillips" <iphillips@s...>
To: <basicstamps@yahoogroups.com>
Sent: Wednesday, January 29, 2003 2:16 PM
Subject: RE: [noparse][[/noparse]basicstamps] Three phase converter
: Been looking at this kind of thing too. If you don't know already
: www.ePanorama.net has some great stuff on motors and just about
: everything else.
: Ian
:
:
Original Message
: From: Leroy Hall [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=MCfg8KmmMo-3MHbNas_uK3BbQxXO4Cxi5DQ28gcnAP5Baks_-WiFsg6Eg0A3XpJ_OYkCSKWHi3S8]leroy@f...[/url
: Sent: January 29, 2003 1:11 PM
: To: basicstamps@yahoogroups.com
: Subject: [noparse][[/noparse]basicstamps] Three phase converter
:
: Hello,
:
: I would like to design & build a three phase motor controller using a
: basic stamp for
: speed control. The program for creating the logic is relatively easy
: for me as is the
: controlling of speed. I would need the motor to run in one direction
: only, therefore an
: H-Bridge motor diver won't be needed. I would like to rectify the AC
: line to provide a DC
: supply for the operation, therefore SCR's are out. What I would like to
: use is FET
: Technology. Question is how due I select a module for these? What kind
: of snubber would I
: need? The motors need to be from 5hp to 25 HP and will be running on
: 220VAC. Does anyone
: know how I might go about selecting a FET control module to fit this
: application? And
: Also how I might go about interfacing this module to the stamp. As
: always thanks for the
: help of all the great guys who give such excellent hints for such
: matters in this group..
:
:
: Leroy
:
:
: To UNSUBSCRIBE, just send mail to:
: basicstamps-unsubscribe@yahoogroups.com
: from the same email address that you subscribed. Text in the Subject
: and Body of the message will be ignored.
:
:
: Your use of Yahoo! Groups is subject to
: http://docs.yahoo.com/info/terms/
:
:
:
: To UNSUBSCRIBE, just send mail to:
: basicstamps-unsubscribe@yahoogroups.com
: from the same email address that you subscribed. Text in the Subject and Body
of the
message will be ignored.
:
:
: Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
:
:
:
Check out
http://www.joliettech.com/what-is-a-variable-frequency-drive.htm
the chip of choice is an Insulated Gate Bipolar Transistor (IGBT)
Early drives used 6 step (half and full voltage) DC to the motor,
then PWM which is just chopped full voltage and now they are running
high speed PWM as the resonant frequency of the motor and the
electrical pulses could make a motor scream ! Typically they will
incude step over frequencies so that if say, a 16Kh PWM signal makes
the motor whine, they can go to 32K or 8K or something inbetween.
The idea being that some frequencies will deliver speed and torque
while not making the motor vibrate enough to make noise from the
power supply.
If you ever hear a 5hp motor sound like a 100hp with 2 bad bearings,
you'll know that is powered by one of those older units.
Dave
--- In basicstamps@yahoogroups.com, "Leroy Hall" <leroy@f...> wrote:
> Hello,
>
> I would like to design & build a three phase motor controller using
a basic stamp for
> speed control. The program for creating the logic is relatively
easy for me as is the
> controlling of speed. I would need the motor to run in one
direction only, therefore an
> H-Bridge motor diver won't be needed. I would like to rectify the
AC line to provide a DC
> supply for the operation, therefore SCR's are out. What I would
like to use is FET
> Technology. Question is how due I select a module for these? What
kind of snubber would I
> need? The motors need to be from 5hp to 25 HP and will be running
on 220VAC. Does anyone
> know how I might go about selecting a FET control module to fit
this application? And
> Also how I might go about interfacing this module to the stamp. As
always thanks for the
> help of all the great guys who give such excellent hints for such
matters in this group..
>
>
> Leroy