Hi

I have bought an AC laminated solenoid of 7 kg for traction

can anyone help to find like this solenoid of 20 kg or more ?

thanx in advance

 

What voltage,and do you mean 20Kg pulling power?

 

yes exactly

 

That is a very high power required, most certainly you would need a DC version.
A small linear actuator may be more practical?
Max.

 

Hi

It's good idea , but my problem with dc supply

I found on alibaba.com a solenoid of 250 N and I wanna try it.

thanx you very much

 

A simple bridge rectifier is all you need for the DC variety.
Max.

 

Hi Max ,
I will see the difference between the 2 components and choose the best.

thanx in advance

 

The DC version is more efficient and less liable to over-current (burn out) in the case of a overload etc.
Max.

 

Hi everyone

Sorry for my new question!

there're an RC snubber network that should be connected to solenoid to protect switch or relay, that connects the solenoid to the electricity source ,from the effects of spark.

The specialist or engineers gives 2 types of RC snubber connection

1- the first in parallel to switch like this photo :

2- the other is parallel to the load ( and optionaly parallel to the source )

so what's the solution ??

Please let me know !

zara

 

...
1- the first in parallel to switch like this photo :

2- the other is parallel to the load ( and optionaly parallel to the source )

Come on, Mr Engineer. Either will work. It is a simple series circuit: Line voltage, voltage across the inductive load, voltage across the open switch.

The line voltage (or DC supply) is a very low impedance source, so it is what it is. As the switch breaks the circuit, the current keeps flowing in the inductor, causing a large instantaneous voltage across the inductance. The voltage across the open switch is equal but opposite in sign to the voltage across the inductance. Putting a snubber in either place will limit the magnitude of the other.

 

Hi cool Mike
thank you very much.

Is this applicable for DC or AC source?

And how to know the value in Kv of the voltage accros the switch?

Please let me know!

thanx in advance
Zara

 

AC is a bit more complicated, because the switch can open at any point in the AC Sine wave.

The maximum allowed voltage is determined by the switch. Design a snubber to limit the peak voltage across the switch...

 

You show a symbol for a DC motor but it is a AC source?
Here is something on snubbers.
Max.

 

Hi Mr MaxHead

thank you very much for the pdf !

you help me a lot in this thread .

 

I forgot this one also.
Max.