Saranya M

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To see what your friends are up to and confirm Venugopal Balla as a friend,
follow the link below:
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Skoost

Hello, all.  To say a little about myself, I'm a semi-retired American living in
Germany.  I've got a decent background in computers / networks, and am somewhat
knowledgeable about electronics.

Now, the question:  Does anyone know why an AEG PN3000 or Fein AYSE 636 drill
will not work on generator power?  I've tried 2 different generators, both rated
well over the power requirements of the drills, but both act as if no
electricity was present.  Other tools work fine.

Thanks

John

Dear all,
Sorry for my question.
Now I'm doing simulation DC motor. My Input using torque. But in my experimental
using DC motor as the specification on the simulation, my input in experimental
is using voltage.
How I can convert in simulation , the torque input to the voltage input. Any
equation for this?

Thanks.
Regard
Khair

When you have a DC motor with permanent magnets, the magnetical flux through the
rotor will be constant.
In this case, the torque that the rotor can deliver is propotional to the
current through the rotor.
If you know the resistance of the rotor, the brushes and the supply cable, and
you know the EMK voltage that the rotor makes, you can calculate the voltage
from these variables.

If it is not a permanent magnet motor, but a motor with coils in the stator, you
have to use a constant current source as supply of the stator coils. In this
case the current through the stator remains constant, even if the motorcoils are
warming up. If the current through the stator is constant, the magnetical flux
through the rotor also will be constant. So you get the same as in the above
example.

Keep in mind that the EMK voltage of the rotor is propotional with the rotor
speed.

good luck

Rudy
   ----- Original Message -----
   From: moh_khairudin
   To: ElecMotorControl@yahoogroups.com
   Sent: Tuesday, March 16, 2010 8:55 AM
   Subject: [ElecMotorControl] Hello, question about convert torque to voltage



   Dear all,
   Sorry for my question.
   Now I'm doing simulation DC motor. My Input using torque. But in my
experimental using DC motor as the specification on the simulation, my input in
experimental is using voltage.
   How I can convert in simulation , the torque input to the voltage input. Any
equation for this?

   Thanks.
   Regard
   Khair





[Non-text portions of this message have been removed]

Hi folks,

Please could someone help me to calculate the values of the electronic
components shown on the article named " Bidirectional VF Control of Single and
3-Phase Induction Motors Using the PIC16F72 " ( Application note AN967 ) from
Microchip, in order that this circuit can be used in 220 V - 60 Hz ?

The Microchip web site address is the following :

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appn\
ote=en022135

And the application note can be found here :

http://ww1.microchip.com/downloads/en/AppNotes/00967A.pdf


I would like to use this circuit to control a single phase AC motor with
permanent capacitor , but the local power supply network where I live in Brazil
is 220 V - 60 Hz.

The power of this motor is 1 / 4 W

Any help will be welcome,


Cheers,


Wilson R. Bastazini
From Brazil

Hi All,
Please help with formulae for calculating Transient Volt Drop of a
380VAlternator run from a Diesel engine.
Given:
The standby load is 85kW( 30KW light n small power + 1of 55kw 6pole motor
started by star delta),
  run KVA is 97 and,
  demand start KVA is 133.

Engine develops 109KW -JohnDeere, Alternator is SINCRO SIL250MH.
From my estimates the X'd is between 0.15 and 0.2pu but I dont have any design
charts, curves or formulae.

Please advise.
Thanks in advance
MAhesh

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<<<< GWAVASIG >>>>

Hey,

I have created a Netlog profile with my pictures, videos, blogs and events and I
want to add you as a friend so you can see it. You first need to register on
Netlog! When you log in, you can create your own profile.

Take a look:
http://en.netlog.com/go/mailurl/-bT04OTkwNzc1MjQmbD0xJmdtPTM3JnU9JTJGZ28lMkZyZWd\
pc3RlciUyRmlkJTNEMjAwMzA2NjI3NSUyNmklM0R0OTE_

Cheers,
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3Y3k1amIyMF8lMjZjb2RlJTNEMDUxMzAyMDclMjZpZCUzRDIwMDMwNjYyNzUlMjZpJTNEdDky


[Non-text portions of this message have been removed]

Hello,

I don't know if I am in the right forum or not, but I will ask.

I am working on an old '50s 3/4hp, continues duty motor.  The frame number is
CEW66F, made by Peerless.  The motor is on an engine lathe and it started
blowing fuses.

I have the motor removed, and it does have a damaged paper covered start
capacitor, but I have not found numbers yet.  The cap is about 2 3/4" in
diameter and about 4" long. The capacitor is wired into one set of windings and
the centrifugal start mechanism.  The motor is single phase 110/220. The lathe
motor is reversable, and I think an operator tried to 'brake' the motor by
throwing it into reverse.

I can adapt whatever, but my question is, what size should this start capacitor
be?

Thank you, Roger Beno

Hi to All of u i m new to this group
I have a query if u people can help me
We have a V.F.D at our Plant its working with PEELER CENTRIFUGE MACHINE for
separation of starch slurry we got an issue with the V.F.D.
Let me tell u first we have Electricity from WAPDA(Authority that supplies
ELECTRICITY) we got no issue with V.F.D during the service provider, during the
WAPDA Shutdowns we have two D.G SETS of 1250KVA which are electrically
synchronized for fulfillment of our requirements of Electricity during WAPDA
Shutdown. We use only one generator when  we have very low load that can be
manage by single generator during usage of single D.G.Set we got fault of freq
converter at V.F.D. but when both the generators are in operation fault didn't
come. In short i can say this
WAPDA ON : NO FAULT at V.F.D
BOTH Generators in Operation: NO fault at V.F.D
One of the two Generator In operation: Freq.Converter Fault at v.f.d.

If some one suggest me what will be the solution to this problem?

Dear Sirs,

At the moment we are desigining a gas compressor unit and we are looking for a
specialist in gas compressor units for remote freelance consulting. If you are
interested in this offer please fill in our inquiry form (see attached) and send
it back to us for further negotiations about our cooperation.

Best regards,
El











[Non-text portions of this message have been removed]

Dear All!

At the moment we are desigining a gas compressor unit and we are looking for a
specialist in gas compressor units for remote freelance consulting. If you are
interested in this offer please reply us to el_espinosa@... for further
negotiations about our cooperation.

Best regards,
El

Hi
Is anyone getting this.
I would like some advice on the matter below.
Regards
MAhesh

>>> Mahesh Govender 5/19/2010 11:34 AM >>>
Hi All,
Please help with formulae for calculating Transient Volt Dropof a 380VAlternator
run from a Diesel engine.

The standby load is 85kW( 30KW light n small power + 1of 55kw 6pole motor
started by star delta),
run KVA is 97 and,
demand start KVA is 133.

Engine develops 109KW -JohnDeere, Alternator is SINCRO SIL250MH.
From my estimates the X'd is between 0.15 and 0.2pu but I dont have any design
charts, curves or formulae.

Please advise.
Thanks in advance
MAhesh

Please read this confidentiality disclaimer:

http://www.durban.gov.za/durban/e_colophon/edisclaimer


[Non-text portions of this message have been removed]

hi friends,

can any one let me know how to calculate (formula) the "heat sissipation" in any
conductor or in coil.

hi friends, can any one let me know how to calculate (formula) the "heat
dissipation" in any conductor or in coil

Hi

I would like to seek for advise, if vsd can be apply on my dyeing machine
with the brand ACME am-ohd. i am looking into if some energy saving can be
achieve.

stanley



On 12/26/10 11:00 PM, "Nani" <arush_15@...> wrote:

>
>
>
>
>
> hi friends,
>
> can any one let me know how to calculate (formula) the "heat sissipation" in
> any conductor or in coil.
>
>
>
>
>>>



[Non-text portions of this message have been removed]

Hi folks,
I've recently bought a mobility scooter with a view to converting it into a
go-cart.
Many of these are capable of a heady 8mph but this one seems to be designed for
only 4mph although the faster models appear to share the same Curtis PMC 1203A
DC controller and 500W permanent magnet 24V motor.
I'm going to be altering the gear ratio but I was wondering if there was any way
of getting the motor spinning a little faster too. It's rated at 3500rpm max.
The control voltage into the controller rises to 5V at full pelt.

You SEV enthousiasts may also check out my other yahoogroups forum
the url http://SmallEfficientVehicles.com/ redirects to it


--- In ElecMotorControl@yahoogroups.com, "intermodx9" <intermod@...> wrote:
>
> Hi folks,
> I've recently bought a mobility scooter with a view to converting it into a
go-cart.
> Many of these are capable of a heady 8mph but this one seems to be designed
for only 4mph although the faster models appear to share the same Curtis PMC
1203A DC controller and 500W permanent magnet 24V motor.
> I'm going to be altering the gear ratio but I was wondering if there was any
way of getting the motor spinning a little faster too. It's rated at 3500rpm
max. The control voltage into the controller rises to 5V at full pelt.
>

Client seeks degreed individuals having hands-on knowledge of programming Allen
Bradley PLC. Positions exist for Project Mgrs. application engineers and field
service. Relocation offered for qualified candidates. Permanent positions.
Client currently interviewing.
Contact Alan Gold (714)990-5525 or alangold@...

Hello, I'm Bob, 65 and live in central Florida. I am here to ask a question and
try to learn something.  I have a small Delta Drill Press I use for little jobs
and it quit.  Now it turns just fine, but has absolutely no power (torque).  I
can hold the shaft pulley with my gloved hand fairly easily. If I turn the
little press on, you would think nothing is wrong, until you try to drill
something, even a piece of wood. It just has no power to drill and it seems this
happened suddenly.  Motor is a Delta Model 1190, 1725 rpm, 2.5 amp., 120 V. I
have no idea of the fractional HP, maybe a quarter, but I'm guessing.  There is
no "burnt" smell to the motor.  Any ideas?  Thanks so much everyone.  Bob

First thing that comes to mind is worn gears (and bearings too if there is any
looseness in them).

--- In ElecMotorControl@yahoogroups.com, "Bana Bob" <charlindabob@...> wrote:
>
> Hello, I'm Bob, 65 and live in central Florida. I am here to ask a question
and try to learn something.  I have a small Delta Drill Press I use for little
jobs and it quit.  Now it turns just fine, but has absolutely no power (torque).
I can hold the shaft pulley with my gloved hand fairly easily. If I turn the
little press on, you would think nothing is wrong, until you try to drill
something, even a piece of wood. It just has no power to drill and it seems this
happened suddenly.  Motor is a Delta Model 1190, 1725 rpm, 2.5 amp., 120 V. I
have no idea of the fractional HP, maybe a quarter, but I'm guessing.  There is
no "burnt" smell to the motor.  Any ideas?  Thanks so much everyone.  Bob
>

--- In ElecMotorControl@yahoogroups.com, super_timm <no_reply@...> wrote:
>
> First thing that comes to mind is worn gears (and bearings too if there is any
looseness in them).

Good morning and thanks, but the press is belt driven and the pulleys are tight
with no slippage. Under a small load, I can stop the motor, even drilling into a
#2 pine 2x4 with a 1/4" bit!  But, under no load, you would think nothing wrong.
As I said, there is no burnt smell or smoke from the motor, just no power. 
Could it be the condensor?  I am guessing as I know little to nothing about
electric motors.
Bob

HI! Bob just ask you something about your Motor Drill press... what is you Motor
Brushes or Brush-less? or AC? well'' if your motor had control to run your motor
probably there is a problem in your motor control but if is that direct drive AC
maybe had a problem with your motor windings... and  you may check the motor
Thermal protection inside the windings use Volt Ohm meter VOM. to check the
windings and protection and check all electrical devices.. to do this for now
and update me what you done...

--- In ElecMotorControl@yahoogroups.com, "Bana Bob" <charlindabob@...> wrote:
>
> Hello, I'm Bob, 65 and live in central Florida. I am here to ask a question
and try to learn something.  I have a small Delta Drill Press I use for little
jobs and it quit.  Now it turns just fine, but has absolutely no power (torque).
I can hold the shaft pulley with my gloved hand fairly easily. If I turn the
little press on, you would think nothing is wrong, until you try to drill
something, even a piece of wood. It just has no power to drill and it seems this
happened suddenly.  Motor is a Delta Model 1190, 1725 rpm, 2.5 amp., 120 V. I
have no idea of the fractional HP, maybe a quarter, but I'm guessing.  There is
no "burnt" smell to the motor.  Any ideas?  Thanks so much everyone.  Bob
>

--- In ElecMotorControl@yahoogroups.com, "EDUARD" <eduard0476@...> wrote:
>
>
> HI! Bob just ask you something about your Motor Drill press... what is you
Motor Brushes or Brush-less? or AC? well'' if your motor had control to run your
motor probably there is a problem in your motor control but if is that direct
drive AC maybe had a problem with your motor windings... and  you may check the
motor Thermal protection inside the windings use Volt Ohm meter VOM. to check
the windings and protection and check all electrical devices.. to do this for
now and update me what you done...
>

I have no Volt/Ohm meter and wouldn't know what I was doing if I did have one. 
Sort of embarressed to admit that, but I know very little about motors although
I completely wired my house, but that is a different thing altogether. All I
know is the pulley is on the motor shaft and a belt runs to another pulley
system, but I have checked all of that and the motor is the problem. Don't know
if it's brushless or not but I will check.  I did pull the motor off and it has
an external capacitor but I don't know if it is for starting or running the
motor.  This is on a little 8" drill press for light duty work.  Just hate to
toss it if it can be fixed cheaper than buying a new one. .....Bob

is the armature aligned properly with the field? some times a thrust washer or
bearing wears out and lets it get out of the field and reduce the torque, also a
a bad capacitor can cause things like this, it is hard to tell from here
but those are two guesses.


----- Original Message ----
From: super_timm <no_reply@yahoogroups.com>
To: ElecMotorControl@yahoogroups.com
Sent: Sun, June 19, 2011 11:42:56 PM
Subject: [ElecMotorControl] Re: New guy, have question, know nothing !!

First thing that comes to mind is worn gears (and bearings too if there is any
looseness in them).


--- In ElecMotorControl@yahoogroups.com, "Bana Bob" <charlindabob@...> wrote:
>
> Hello, I'm Bob, 65 and live in central Florida. I am here to ask a question
and
>try to learn something.  I have a small Delta Drill Press I use for little jobs
>and it quit.  Now it turns just fine, but has absolutely no power (torque).  I
>can hold the shaft pulley with my gloved hand fairly easily. If I turn the
>little press on, you would think nothing is wrong, until you try to drill
>something, even a piece of wood. It just has no power to drill and it seems
this
>happened suddenly.  Motor is a Delta Model 1190, 1725 rpm, 2.5 amp., 120 V. I
>have no idea of the fractional HP, maybe a quarter, but I'm guessing.  There is
>no "burnt" smell to the motor.  Any ideas?  Thanks so much everyone.  Bob
>




------------------------------------

Join LMPForum for more discussions.
LMPhotonics Forum www.LMPforum.com
LMPhotonics Web Site www.LMPhotonics.com
Yahoo! Groups Links

Hi! Bob have you check your Push Button switch? i think is that one of ruin why
can't start the motor,  well'' the Capacitor is one of device to speed run of
your motor that's what we called Running Capacitor... your motor is single phase
120vac is that induction motor. this is Tip for you to troubleshoot your Drill
motor. first check your Push Button switch and wire cable going to your motor
terminal if this is not connected to the terminal motor. this is the basic
procedure to find the problem of your motor... do this and up date me... thanks

--- In ElecMotorControl@yahoogroups.com, "Bana Bob" <charlindabob@...> wrote:
>
>
>
> --- In ElecMotorControl@yahoogroups.com, "EDUARD" <eduard0476@> wrote:
> >
> >
> > HI! Bob just ask you something about your Motor Drill press... what is you
Motor Brushes or Brush-less? or AC? well'' if your motor had control to run your
motor probably there is a problem in your motor control but if is that direct
drive AC maybe had a problem with your motor windings... and  you may check the
motor Thermal protection inside the windings use Volt Ohm meter VOM. to check
the windings and protection and check all electrical devices.. to do this for
now and update me what you done...
> >
>
> I have no Volt/Ohm meter and wouldn't know what I was doing if I did have one.
Sort of embarressed to admit that, but I know very little about motors although
I completely wired my house, but that is a different thing altogether. All I
know is the pulley is on the motor shaft and a belt runs to another pulley
system, but I have checked all of that and the motor is the problem. Don't know
if it's brushless or not but I will check.  I did pull the motor off and it has
an external capacitor but I don't know if it is for starting or running the
motor.  This is on a little 8" drill press for light duty work.  Just hate to
toss it if it can be fixed cheaper than buying a new one. .....Bob
>

--- In ElecMotorControl@yahoogroups.com, "EDUARD" <eduard0476@...> wrote:

   "Hi! Bob have you check your Push Button switch? i think is that one of ruin
why can't start the motor,  well'' the Capacitor is one of device to speed run
of your motor that's what we called Running Capacitor... your motor is single
phase 120vac is that induction motor. this is Tip for you to troubleshoot your
Drill motor. first check your Push Button switch and wire cable going to your
motor terminal if this is not connected to the terminal motor. this is the basic
procedure to find the problem of your motor... do this and up date me... thanks"

Hi Eduard, The motor has no push button switch or reset.  The motor starts and
runs just fine, it just has NO power (meaning torque, not electricity) when
under any kind of load. It runs, no wobble to the shaft, has great rpm, no burnt
motor smell, everything appears normal.....until it is under a load. I cannot
drill through a 2x4 because the pressure of trying to drill through it stops the
motor.
Thanks,
Bob

hi! Bob ok now i know your problem... as what you said, the ,motor it just fine
when under no load. let me guess did your motor run when no load or when you try
to Drill something it's didn't stop the motor  it is continue running the motor
or it's stop running? two things sir Bob maybe your running capacitor weak can't
store enough electricity or your belt drive and pulley drive specially
mechanical drive can be had difference...

--- In ElecMotorControl@yahoogroups.com, "Bana Bob" <charlindabob@...> wrote:
>
>
>
>
>
>
>
>
> --- In ElecMotorControl@yahoogroups.com, "EDUARD" <eduard0476@> wrote:
>
>   "Hi! Bob have you check your Push Button switch? i think is that one of ruin
why can't start the motor,  well'' the Capacitor is one of device to speed run
of your motor that's what we called Running Capacitor... your motor is single
phase 120vac is that induction motor. this is Tip for you to troubleshoot your
Drill motor. first check your Push Button switch and wire cable going to your
motor terminal if this is not connected to the terminal motor. this is the basic
procedure to find the problem of your motor... do this and up date me... thanks"
>
> Hi Eduard, The motor has no push button switch or reset.  The motor starts and
runs just fine, it just has NO power (meaning torque, not electricity) when
under any kind of load. It runs, no wobble to the shaft, has great rpm, no burnt
motor smell, everything appears normal.....until it is under a load. I cannot
drill through a 2x4 because the pressure of trying to drill through it stops the
motor.
> Thanks,
> Bob
>

Well, I have removed the capacitor and will try to find another to replace it.
The capacitor is marked as: ADM TYPE, 16uF+-10/5%, 250V.AC,-25*C ~ +70*C,
50/60HZ, AID ELECT........Now to find an electrical supply store that sells this
thing.  I reckon it is worth a try to replace the capacitor.
Bob



--- In ElecMotorControl@yahoogroups.com, "EDUARD" <eduard0476@...> wrote:
>
>
>  hi! Bob ok now i know your problem... as what you said, the ,motor it just
fine when under no load. let me guess did your motor run when no load or when
you try to Drill something it's didn't stop the motor  it is continue running
the motor or it's stop running? two things sir Bob maybe your running capacitor
weak can't store enough electricity or your belt drive and pulley drive
specially mechanical drive can be had difference...
>
> --- In ElecMotorControl@yahoogroups.com, "Bana Bob" <charlindabob@> wrote:
> >
> >
> >
> >
> >
> >
> >
> >
> > --- In ElecMotorControl@yahoogroups.com, "EDUARD" <eduard0476@> wrote:
> >
> >   "Hi! Bob have you check your Push Button switch? i think is that one of
ruin why can't start the motor,  well'' the Capacitor is one of device to speed
run of your motor that's what we called Running Capacitor... your motor is
single phase 120vac is that induction motor. this is Tip for you to troubleshoot
your Drill motor. first check your Push Button switch and wire cable going to
your motor terminal if this is not connected to the terminal motor. this is the
basic procedure to find the problem of your motor... do this and up date me...
thanks"
> >
> > Hi Eduard, The motor has no push button switch or reset.  The motor starts
and runs just fine, it just has NO power (meaning torque, not electricity) when
under any kind of load. It runs, no wobble to the shaft, has great rpm, no burnt
motor smell, everything appears normal.....until it is under a load. I cannot
drill through a 2x4 because the pressure of trying to drill through it stops the
motor.
> > Thanks,
> > Bob
> >
>

Well, an update:  Found the problem, a bad capacitor.  New capacitor, works
like a charm!
Bob

As a part of energy savings , can delta connected motor be changed to an Star
connection,  using an delta star convertor
if so what is minimum requirement over an motor for such modifciation , and also
what are the additional units required for this process conversion ?