On Sunday 04 March 2012 10:34:32 Joachim Franek wrote:
2. Add 6 and gates to stop motor commutation in case of to high DC voltage.
Search the net for IGBT protection and find for example:
ir2137igbt.pdf: IGBT Protection for AC and BLDC Motor Drives
fuji_igbt_application_manual(REH984).pdf:
i'm in an apt, so i'd have to luck out and find to wall strings on different
legs for dopple volts.
--- On Thu, 3/8/12, Kirk Wallace kwall...@wallacecompany.com wrote:
From: Kirk Wallace kwall...@wallacecompany.com
Subject: Re: [Emc-users] IRAMS Plan, FAN7382 with BUZ11
To: Enhanced Machine
2012/3/6 Joachim Franek joachim.fra...@pibf.de:
FNB41060 - IGBT SMART PM,600V,10A
10 Euro at Farnell
I think the IRAMS and this FNB41060 definitely 'solve' the H-bridge
part of the circuit. The challenge is to design current-sensing,
EMI-filtering, powersupplies, and optoisolation around the
: Jon Elson el...@pico-systems.com
Subject: Re: [Emc-users] IRAMS Plan, FAN7382 with BUZ11
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Date: Wednesday, March 7, 2012, 10:38 AM
charles green wrote:
so the motor in, say, a small drill press or a _bench
grinder_
Awallin,
those gate drive opto's from Shane Colton are sweet
and the MITER's blogs are great
I have to replace an ebike BLDC controller
maybe able to use orphaned Mitsubishi motors with his design
thanks
TomP
--
On Thu, 2012-03-08 at 03:19 -0800, charles green wrote:
it is a cost sensitive application, as always, and limited to single
115v phase mains supply. there are the sherline spindles/motors with
decent speed controls, but sherline stuff is kinda spendy. i dont
recall seeing any retail vfd
Up to ~1.5hp you can buy 115v input VFDs that output 220v. I think they
just use voltage doublers in their rectifier stage and 2x the capacitance.
FWIW, these DON'T work well in a (properly wired) garage. 120V outlets in
a garage are supposed to all be GFCI protected. Motor frame leakage
tools work ok for small small small stuff, but tend
to have really sloppy bearings. (..and they are noisy.))
--- On Tue, 3/6/12, Jon Elson el...@pico-systems.com wrote:
From: Jon Elson el...@pico-systems.com
Subject: Re: [Emc-users] IRAMS Plan, FAN7382 with BUZ11
To: Enhanced Machine
charles green wrote:
so the motor in, say, a small drill press or a _bench grinder_ is probably of
the resistive start winding type?
Yes, generally. Some of these may be capacitor-start, however. If it
has a big rounded lump
on the side of the motor, then it is cap start.
it would be
: Wednesday, March 7, 2012 12:38 PM
Subject: Re: [Emc-users] IRAMS Plan, FAN7382 with BUZ11
charles green wrote:
so the motor in, say, a small drill press or a _bench grinder_ is probably
of the resistive start winding type?
Yes, generally. Some of these may be capacitor-start, however
Greg Bernard wrote:
Are you saying a single phase motor can be driven with 2 phase? How would
that be done and how would you control speed with such an arrangement?
Almost all motors that run from single-phase mains are actually 2-phase
motors.
The exception are the shaded-pole motors.
On Wed, 2012-03-07 at 21:01 -0600, Jon Elson wrote:
... snip
But, capacitor-RUN motors are made to have the start winding energized
continuously. If you had a VFD that was designed to produce two outputs
with a 90 degree phase shift, you could run a capacitor-run motor from
it just fine. You
FNB41060 - IGBT SMART PM,600V,10A
10 Euro at Farnell
Joachim
--
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what are the differences between one phase motors, two phase motors, and three
phase motors?
--- On Sun, 3/4/12, Jon Elson el...@pico-systems.com wrote:
From: Jon Elson el...@pico-systems.com
Subject: Re: [Emc-users] IRAMS Plan, FAN7382 with BUZ11
To: Enhanced Machine Controller (EMC) emc
On Tue, 2012-03-06 at 04:22 -0800, charles green wrote:
what are the differences between one phase motors, two phase motors, and
three phase motors?
Generally, single phase power can be described with a single sine wave.
The sine wave is the voltage measured between L1 and L2 on the mains and
charles green wrote:
what are the differences between one phase motors, two phase motors, and
three phase motors?
A single-phase motor needs something to get it started, as there is no phase
rotation to cause the rotor to start turning. There are shaded-pole motors,
resistive-start,
charles green wrote:
what are the differences between one phase motors, two phase motors, and
three phase motors?
Oh, I wanted to add that a 2-phase motor has a 90 degree phase shift between
the two pases. A 3-phase motor has a 120 degree shift between phases.
Jon
Any suggestions are welcome.
Hello.
Overvoltage protection:
If the motor acts as a generator DC voltage increases.
1. Add a transistor which switches a resistor in parallel to the DC supply.
2. Add 6 and gates to stop motor commutation in case of to high DC voltage.
Joachim
Hello,
I can report some progress for my attempts to
drive 3 phase motors. I do this to be familiar with the
bldc component and use for safety low voltage devices.
My setups:
Electronics: FAN7382 and BUZ11 board
(http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Bridges_-_Half,_Full,_Three_Phase)
Hal:
On 3 March 2012 19:03, Kirk Wallace kwall...@wallacecompany.com wrote:
I was thinking of using an AVR analog input to sense the IRAMS internal
sense resistor then use software to look for current peaks and separate
the leg currents if needed, but this is much easier to plan, than to
make
On Sun, 2012-03-04 at 11:43 +0100, Joachim Franek wrote:
Hello,
I can report some progress for my attempts to
drive 3 phase motors. I do this to be familiar with the
bldc component and use for safety low voltage devices.
My setups:
Electronics: FAN7382 and BUZ11 board
On Sun, 2012-03-04 at 13:19 +0200, Roland Jollivet wrote:
On 3 March 2012 19:03, Kirk Wallace kwall...@wallacecompany.com wrote:
I was thinking of using an AVR analog input to sense the IRAMS internal
sense resistor then use software to look for current peaks and separate
the leg
Joachim Franek wrote:
But I see cross current
in case one leg is active from pwm and a
commutation occurs. Then for about 120ns
I measure a current of 70A (peak).
I need a comp to delay the rising edge
on the upper fet for one cycle of the fast thread
in case in the last cycle the fet
On Sunday 04 March 2012 18:12:09 Kirk Wallace wrote:
I don't know what a SPSM motor is, but from this they can get big:
http://www-personal.engin.umd.umich.edu/~chrismi/publications/2009_45_12_TMAG_Solid_equi.pdf
Excuse the typo:
PMSM: permanent magnet synchronous motor
All test are with
2012/3/3 Anders Wallin anders.e.e.wal...@gmail.com:
To make your design fool-proof you need to sense current, possibly on
all three motor phases, and do it reliably and quickly in order to
shutdown the IRAMS and/or pwm-source when something bad happens.
Anders, can You suggest, how to
Anders, can You suggest, how to implement that (preferably a simple
and easy way, so that even child or golden retriever :) would
understand)? The scheme in my IRAMS datasheet suggests using Shunt
resistors for that, but I suspect that something else should also be
needed, but I have no idea,
On Sat, 2012-03-03 at 09:40 +0200, Anders Wallin wrote:
... snip
IIRC what can cause a sudden death of the IRAMS is overcurrent for
some reason or another.
To make your design fool-proof you need to sense current, possibly on
all three motor phases, and do it reliably and quickly in order to
On Saturday, March 03, 2012 12:03:01 PM Przemek Klosowski did opine:
Anders, can You suggest, how to implement that (preferably a simple
and easy way, so that even child or golden retriever :) would
understand)? The scheme in my IRAMS datasheet suggests using Shunt
resistors for that, but
On Sat, Mar 3, 2012 at 4:12 AM, Viesturs Lācis viesturs.la...@gmail.comwrote:
2012/3/3 Anders Wallin anders.e.e.wal...@gmail.com:
To make your design fool-proof you need to sense current, possibly on
all three motor phases, and do it reliably and quickly in order to
shutdown the IRAMS
On Sat, 3 Mar 2012, gene heskett wrote:
Date: Sat, 3 Mar 2012 12:20:02 -0500
From: gene heskett ghesk...@wdtv.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] IRAMS Plan
On Saturday, March 03
@lists.sourceforge.net
Subject: Re: [Emc-users] IRAMS Plan
On Saturday, March 03, 2012 12:03:01 PM Przemek Klosowski did opine:
Anders, can You suggest, how to implement that (preferably a simple
and easy way, so that even child or golden retriever :) would
understand)? The scheme in my
(First Message may have failed due to attachment too big)
Attached is my first pass at an IRAMS circuit. It's pretty much a copy
of the IRF datasheet example. The plan is to hook up the digital signals
to an FPGA card, Pluto-P if I can find it, or 5i25 if I sell something
on eBay. The analog
2012/3/2 Kirk Wallace kwall...@wallacecompany.com:
(First Message may have failed due to attachment too big)
Attached is my first pass at an IRAMS circuit. It's pretty much a copy
of the IRF datasheet example. The plan is to hook up the digital signals
to an FPGA card, Pluto-P if I can find
On Fri, 2012-03-02 at 21:52 +0200, Viesturs Lācis wrote:
... snip
From my discussions with Andy Pugh our agreement was that 3-phase
pwmgen output from Mesa card should be the thing to feed into IRAMS
module.
... snip
The parallel port is too slow. I already have a Pluto-P and Pico UPC. I
think
On Fri, 2012-03-02 at 13:17 -0800, Karl Cunningham wrote:
... snip
What DC bus voltage are you planning to feed to the IRAMS module?
I have a 45 Volt motor to start testing with. I 'll probably start at 30
to 50 Volts depending on what supply I can scrounge up, then go up from
there. I would
Attached is my first pass at an IRAMS circuit. It's pretty much a copy
of the IRF datasheet example. The plan is to hook up the digital signals
to an FPGA card, Pluto-P if I can find it, or 5i25 if I sell something
on eBay. The analog signals are an unknown for now. IRF seems to
recommend
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