servo-usecases

Elisa Foltyn
2021-04-06T13:55:17+02:00
Motion Arena
Baum��ller

Drive Integrated process optimization

Use cases for servo pump applications
1 2 3

Use case 1: Pressure sensor monitoring
? Overview
Function

Pump pressure is monitored and regulated in the drive

Pressure sensors for pressure measurement in the hydraulic circuit are monitored at regular intervals

Pressure sensors show an increasing sensor drift due to aging

Possible Problem: Pump rotates in wrong direction as the pressure can not be determined correctly

At regular intervals, a sensor offset is performed

In case of a deviation, a sensor offset is performed (calibration of the sensor to target pressure)

Pressure in the pump is OK despite the aging process of the sensor

Benefits

Pump protection

Extension of the maintenance interval (pump can be operated for a longer time without sensor maintenance)

Detection of necessary sensor replacement

High machine availability

Product quality remains consistently high

Use case 2: Speed monitoring
? Overview
Function

Each pump is subject to wear (aging process)

Speed increases with constant volume flow leakage increases over time)

Speed is readjusted in the drive

If warning limit is reached, a warning is displayed �C production can continue

Output via maintenance interface of the drive or via fieldbus

Deviations from the leakage characteristic curve indicate wear

Benefits

Extension of availability by readjustment of the pump speed

Integrated condition monitoring: Unplanned downtime can be reduced

Use case 3: Pump monitoring
? Overview
Function

Monitoring of the servo pump

Protection of the pump against thermal overload WITHOUT temperature sensor

Thermal overload is particularly likely in case of long dwell times during the machine cycle

Thermal overload increases wear and can lead to premature pump failure

Calculation of the thermal pump load via Temperature model (speed, temperature, pressure)

When the threshold value is reached, hydraulic bypasses are switched on to relieve the pump

The pump is flushed to prevent damage caused by overheating

Detection of unusual conditions in the hydraulic system (e.g. mechanical friction due to clogged filters)

Protection of the pump against overloading by means of bypass

Bypass is not used for regulation, only in emergency situations

Benefits

Protection against pump failures caused by thermal overload �C increased availability

Integrated condition monitoring: Unplanned downtime can be reduced

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