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Sci.Electronics.Basics -> Help with simple DC motor
There are 7 messages in this thread.
You are currently looking at messages 1 to 7.
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Author: JatanDate: 13:58 12-05-08
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I need help in designing and simulating a circuit on PSIM/Matlab/
PSpice for a simple DC motor going forward/stop/reverse using a 12Vdc
source
My application is a power window DC motor controlled by up/neutral/
down window switch - any tips/ideas?
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Author: Tim WescottDate: 15:08 12-05-08
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Jatan wrote:
> I need help in designing and simulating a circuit on PSIM/Matlab/
> PSpice for a simple DC motor going forward/stop/reverse using a 12Vdc
> source
>
> My application is a power window DC motor controlled by up/neutral/
> down window switch - any tips/ideas?
What exactly are you trying to simulate? The motor as a load, or the
terminal behavior of the motor, with position out vs. volts in?
Are you asking which of the above mentioned tools would be best for this?
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
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Author: JatanDate: 19:35 12-05-08
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On May 12, 2:08=A0pm, Tim Wescott <t...@seemywebsite.com> wrote:
> What exactly are you trying to simulate? =A0The motor as a load, or the
> terminal behavior of the motor, with position out vs. volts in?
>
> Are you asking which of the above mentioned tools would be best for this?
>
> --
>
> Tim Wescott
> Wescott Design Serviceshttp://www.wescottdesign.com
>
> Do you need to implement control loops in software?
> "Applied Control Theory for Embedded Systems" gives you just what it
says.=
> See details athttp://www.wescottdesign.com/actfes/actfes.html
Behavior of the motor - showing outputs (voltage, current, speed) when
the up switch is pressed and then the same for when the down switch is
pressed with the motor spinning the other way to roll down a window
I guess I need an H-bridge type circuit
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Author: John FieldsDate: 20:36 12-05-08
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On Mon, 12 May 2008 16:35:53 -0700 (PDT), Jatan <jatans@gmail.com>
wrote:
>On May 12, 2:08 pm, Tim Wescott <t...@seemywebsite.com> wrote:
>> What exactly are you trying to simulate? The motor as a load, or the
>> terminal behavior of the motor, with position out vs. volts in?
>>
>> Are you asking which of the above mentioned tools would be best for this?
>>
>> --
>>
>> Tim Wescott
>> Wescott Design Serviceshttp://www.wescottdesign.com
>>
>> Do you need to implement control loops in software?
>> "Applied Control Theory for Embedded Systems" gives you just what it
says.
>> See details athttp://www.wescottdesign.com/actfes/actfes.html
>
>Behavior of the motor - showing outputs (voltage, current, speed) when
>the up switch is pressed and then the same for when the down switch is
>pressed with the motor spinning the other way to roll down a window
>
>I guess I need an H-bridge type circuit
---
Yes.
Plus:
1. When the switch is released, and it goes to neutral, do you want to
brake the motor or let it coast to a stop?
2. Do you want to have limit switches at the ends of the window's
travel or do you just want stall current to be drawn until the
switch is released and goes to neutral?
JF
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Author: JatanDate: 21:38 12-05-08
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On May 12, 7:36=A0pm, John Fields <jfie...@austininstruments.com> wrote:
> On Mon, 12 May 2008 16:35:53 -0700 (PDT), Jatan <jat...@gmail.com>
> wrote:
>
>
>
>
>
> >On May 12, 2:08=A0pm, Tim Wescott <t...@seemywebsite.com> wrote:
> >> What exactly are you trying to simulate? =A0The motor as a load, or the=
> >> terminal behavior of the motor, with position out vs. volts in?
>
> >> Are you asking which of the above mentioned tools would be best for thi=
s?
>
> >> --
>
> >> Tim Wescott
> >> Wescott Design Serviceshttp://www.wescottdesign.com
>
> >> Do you need to implement control loops in software?
> >> "Applied Control Theory for Embedded Systems" gives you just
what it sa=
ys.
> >> See details athttp://www.wescottdesign.com/actfes/actfes.html
>
> >Behavior of the motor - showing outputs (voltage, current, speed) when
> >the up switch is pressed and then the same for when the down switch is
> >pressed with the motor spinning the other way to roll down a window
>
> >I guess I need an H-bridge type circuit
>
> ---
> Yes.
>
> Plus:
>
> 1. When the switch is released, and it goes to neutral, do you want to
> =A0 =A0brake the motor or let it coast to a stop?
>
> 2. Do you want to have limit switches at the ends of the window's
> =A0 =A0travel or do you just want stall current to be drawn until the
> =A0 =A0switch is released and goes to neutral?
>
> JF- Hide quoted text -
>
> - Show quoted text -
Which ever is easier for both those options
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Author: Tim WescottDate: 22:20 12-05-08
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On Mon, 12 May 2008 16:35:53 -0700, Jatan wrote:
> On May 12, 2:08Â pm, Tim Wescott <t...@seemywebsite.com> wrote:
>> What exactly are you trying to simulate? Â The motor as a load, or the
>> terminal behavior of the motor, with position out vs. volts in?
>>
>> Are you asking which of the above mentioned tools would be best for
>> this?
>>
>> --
>>
>> Tim Wescott
>> Wescott Design Serviceshttp://www.wescottdesign.com
>>
>> Do you need to implement control loops in software? "Applied Control
>> Theory for Embedded Systems" gives you just what it says. See details
>> athttp://www.wescottdesign.com/actfes/actfes.html
>
> Behavior of the motor - showing outputs (voltage, current, speed) when
> the up switch is pressed and then the same for when the down switch is
> pressed with the motor spinning the other way to roll down a window
>
> I guess I need an H-bridge type circuit
Model the motor as a resistor (the armature resistance) in series with a
capacitor that's in parallel with a resistor. The cap/resistor parallel
combination simulates the inertia and friction of the mechanical load, as
seen by the motor.
Set the series resistor value to the armature resistance, set the second
resistor (that's in parallel with the cap) to properly establish your
expected 'running' current, then choose the cap to give you the right
mechanical time constant.
--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com
Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html
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Author: JatanDate: 07:11 13-05-08
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> Model the motor as a resistor (the armature resistance) in series with a
> capacitor that's in parallel with a resistor. =A0The cap/resistor parallel=
> combination simulates the inertia and friction of the mechanical load, as
> seen by the motor.
>
> Set the series resistor value to the armature resistance, set the second
> resistor (that's in parallel with the cap) to properly establish your
> expected 'running' current, then choose the cap to give you the right
> mechanical time constant.
>
> --
> Tim Wescott
> Control systems and communications consultinghttp://www.wescottdesign.com
>
> Need to learn how to apply control theory in your embedded system?
> "Applied Control Theory for Embedded Systems" by Tim Wescott
> Elsevier/Newnes,http://www.wescottdesign.com/actfes/actfes.html- Hide quot=
ed text -
>
> - Show quoted text -
Thanks for the help - will look into it
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