Hi All,

I am newbie in electronic, but I have little project.
Can some body help me please about DC Motor Overload Protection Circuit?
I have see on youtube

https://www.youtube.com/watch?v=z8hFJkP2zw4&feature=youtube_gdata_player

Its use :
MOFSET(IRF830)
C1815
Resistor (don't know how many ohms)
Relay SPDT.

Regards

 

Hi All,

I am newbie in electronic, but I have little project.
Can some body help me please about DC Motor Overload Protection Circuit?
I have see on youtube

https://www.youtube.com/watch?v=z8hFJkP2zw4&feature=youtube_gdata_player

Its use :
MOFSET(IRF830)
C1815
Resistor (don't know how many ohms)
Relay SPDT.

Regards

U need to post your diagram.

 

U need to post your diagram.

Thats is the problem, I need help for this diagram.
Any body now about this, please help

 

That is the main problem. We cannot help you if you do not have anything.

So you saw a youtube and you want to make it. Fine, but you have to ask the guy who posted the video. Not us.

Cause we do not have diagrams laying around. We help not make.

But I will tell u this.
A motor overload protection can be made if we know the motor type ( it's data or specification )
It's load. What is it driving etc.

You don't just build and overload and expect it to work for ya.
Overload protector are build for THAT motor.

Its use :
MOFSET(IRF830)
C1815
Resistor (don't know how many ohms)
Relay SPDT.

In addition the above does not make any sense to me.

 

Do you have a motor to begin with?
If so tell us.

 

It is usually preferable and more practical to build in current limit rather than motor cut off.
This is how it is done in electronically controlled motor drives.
Max.

 

A good option these days is to use a SMPS PSU. They are common and cheap, and have voltage regulation which is good for motor performance and safety. They also have current limiting, which is excellent for motor protection and limiting startup current etc.

Just buying a modern SMPS PSU instead of a traditional transformer/bridge/cap PSU will solve most of your problems. It is also smaller, lighter and cheaper!

 

It looks like it's just a relay across a series resistor that latches or unlatches.

Not a standard circuit that someone will engineer for you.
Something to experiment with if you understand the principle.

 

Thanks all for the reply,

Thats the point, I must detect jammed dc motor,
actualy in dc motor has already apply thermal protection.
but I have circuit to control DC motor, this circuit must detect when rotate dc motor.

For the limit switch is greath idea, but its not recomended for my design.

regards

 

Then we need to see the diagram to put the so called overload protector.

If you do not tell us what we need to know, it's just useless to go on.

You haven't told us any thing about the drive circuit and motor spec

 

Give me the must hold and must trip current and I'll see if one of these would work.

http://forum.allaboutcircuits.com/showthread.php?t=93967

It's just a reed switch in series with the stop circuit latched relay.

If you have access to ac side of circuit and current rises proportionately, one of these might work. (picture)


Dc versions are not as available.

 

Here is a way that might work.

Select series load resistor R2 and CR1/R1 combination, so that CR1/R1 drops out with voltage drop under overload.

 

I have DC motor 12V, 10A.
I need help build circuit for detection jammed motor to cut off the power.
To all Senior, please help me.

Regards

 

Here is a way that might work.

Select series load resistor R2 and CR1/R1 combination, so that CR1/R1 drops out with voltage drop under overload.

What, no good?

This it what was suggested by the video.

If my simple examples won't work for you, someone on here can design a solid state circuit to your specs.

Or are you looking for something to buy off the shelf?

 

What, no good?

This it what was suggested by the video.

If my simple examples won't work for you, someone on here can design a solid state circuit to your specs.

Or are you looking for something to buy off the shelf?

Oke, I will try this circuit,
I hope this work, many thanks all.

 

I am very confuse about this,
I have motor power windows 12V 20Amp,
and I have circuit to operate this motor with time delay relay 5s.
If the motor has stall (full close window), I must cutt off the power.
Because I use remote to operate Auto Up from auto lock door.
My circuit has run as well, but if lock door operate many time in shot duration,
the power has run to the motor for along time,
Because motor has stall, my circuit has been hot.
So I need build Overload Protection for safety my circuit,
In my country hasn't shel circuit breaker.
Any body now about this? please help me

 

Dear all,

Finaly its done, many thanks for support.