Hello 

I'm building a special press machine with 2 hydraulic pumps.

Since about of 40% the machine cycle is dead, I thought of using a servo motor, in order to save energy, and reduce the system wear.

the machine cycle is about 300 seconds.

Pump No.1 need to work in the range of about 500-4000 RPM, with max power of 0.75 KW for about 20 seconds, 2 times in a cycle. In the rest of the time, this pump need to work in 0.6 KW for 5 seconds, 4 times in a cycle.

Pump No.2 need to work in the range of about 500-4000 RPM, with max power of 0.2 KW for about 10 seconds, 1 times in a cycle. In the rest of the time, this pump need to work in much lower power.

I thought of using V90 0.75KW (Low inertia motor) for both of the pumps.

This motor can provide the needed speed and torque.

When I  look and the SINAMICS selection guide, I don't see V90 series in the hydraulic pump application.

I also don't see it in Hydraulic systems - mall.

If I understand correctly, G120 driver and induction motor, won't be able to give me the requested speed, so I need to choose a servo motor.

Why does V90 is not recommended, and what are the benefits of S120 system?

The only reason that I see for using S120 system, is the DCC app for hydraulic pumps.  SINAMICS DCC servo pump , but I think that I will be able implement similar functions with V90 system.  

Thanks in advance

Uri

Hi,

that overview is still valid but also a little bit out-dated.

So where you can see the S110 (medium range for non-continuous motion) I would more or less also see the SINAMICS V90 -> maybe between basic and medium - always depends on accuracy etc. 

The S110 system is an old product - the successor of it is the SINAMICS S210, which is also a single axis servo drive.

So the actual range/portfolio of servo controllers is:

V90 - basic (single axis drive for basic motion control with less accuracy requirements)

S210 - medium (single axis drive for high performance and accuracy in motion control)

S120 - high end (very flexible multi axes drive system for high performance and accuracy in motion control)

Thanks for your answer.

So if I understand correctly, using a V90 system for a hydraulic pump should be OK.

Correct me if I'm wrong.

Uri

Hi,

I do not really want to give a concrete answer that it will work for your requirements for sure. 

My suggestion would be to contact your local Siemens sales partner and talk about the application details with him/her to find the best fitting configuration.