Author Topic: PVG32 PVEM Proportional actuation  (Read 11829 times)

PARK JONG SOO

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PVG32 PVEM Proportional actuation
« on: November 09, 2010, 10:59:33 AM »
There has not been a problem so far to control PVG32 with PLUS+1 Micro Controller using PVEH proportional atuation.
However, if PVEM proportional atuation are used, the problem that the signal becomes unstable takes place.
Could you please tell me what the reason is?
(I’ve controlled it using the ‘PVE DRIVE’ of ‘FB Library’ which is in the PLUS GUIDE.)

Offline Stefan

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Re: PVG32 PVEM Proportional actuation
« Reply #1 on: November 09, 2010, 11:10:09 AM »
Hello,

The output from the PLUS+1 controller is a PWM-signal usually 4 kHz. The filter on the input of the PVEM is not able to suppress this frequency enough so is will interfere in the control of the valve.

Stefan

PARK JONG SOO

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Re: PVG32 PVEM Proportional actuation
« Reply #2 on: November 10, 2010, 09:57:22 AM »
Hello Stepan,

Thank you for reply my topic right away
As far as I know, if PVEM proportional atuation are used, the output from the PLUS+1 controller is voltage signal.
PVEM is converts voltage to generate energy ON/OFF signal.
PVEH is converts voltage to generate energy PWM-signal.
 
Best regards.
Park
« Last Edit: November 10, 2010, 10:01:20 AM by park »

Offline Stefan

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Re: PVG32 PVEM Proportional actuation
« Reply #3 on: November 10, 2010, 10:28:09 AM »
Hello,

It's the PVEO that works as on/off with 2 output pins. One for port A and one for port B on the valve.

Stefan

kfeng

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Re: PVG32 PVEM Proportional actuation
« Reply #4 on: November 26, 2010, 05:57:21 PM »
Hi everyone,
I am a novice pvg32 user.
My PVG32 five bank system currently has all PVEM coils.
Lets say if one of the PVEM coils becomes spoilt,
(Lets assume say there is currently no stock for a PVEM coil at hand, and would take some time to indent one)
Can i use a PVEH to fill in the job of the PVEM ?   
What would be the result?
Can anyone help me here?
Thanks a lot.

jsaluk

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Re: PVG32 PVEM Proportional actuation
« Reply #5 on: November 26, 2010, 07:48:53 PM »
I've used the PVEA actuator controled by PVEA function block without issues.  It is a bit slower to respond than a PVEH, but linearity is excellent, hysteresis low and it is less costly than a PVEM. 

Jelmer

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Re: PVG32 PVEM Proportional actuation
« Reply #6 on: November 30, 2010, 01:47:37 PM »
Normally it's no problem to replace a medium by a high. We do it lots of times in case of emergency.

Offline Marbek_Elektronik

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Re: PVG32 PVEM Proportional actuation
« Reply #7 on: March 22, 2012, 05:38:54 PM »
I have drived many PVEM with Plus1 PWM Outputs (4kHz).
But I have seen no problem.
It were many forest cranes with 2 PVEH and 4 PVEM valves.
Marbek Elektronik, Dipl.-Ing. Bernd Konrad
Dienstleistung, Entwicklung, Herstellung

valtranovice

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Re: PVG32 PVEM Proportional actuation
« Reply #8 on: April 18, 2012, 09:45:56 PM »
hello this is my first post in this forum, i hope it is ok to tag onto the end of this discussion.

we have 2 pvg 32 proportional valves that operate a front loader on a tractor, since being serviced, the bucket tips but the loader arms do not go up or down. swapping the left to right and right to left the working functions are reversed, so its not a problem further on in the system

we have been advised to check the connection, and check if any dirt has got in to stop oil flow which we have done to no avail.

The green light remains on all the time, but a safety/error state has been mentioned. could this have anything to do witth the non-function?

If anyone could give advice i would be most gratefull