EMG Automation GmbH / Industriestraße 1 / 57482 Wenden (Ger) Tel. + 49 (0) 27 62 / 612 - 0
Fax. + 49 (0) 27 62 / 612 - 384
info@emg-automation.com
Actuators
ESZ electric servo cylinder
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Function:
Electromechanical linear drive
Mechanical design:
Electric motor with planetary gear drive in the
housing block
Connection:
Electrical via frequency converter,
mechanical trunnion and swivel head
Colour/weight:
see separate dimension sheets
weight: from approx.: 40 …240 kg
(depending on the design)
Intended purpose:
The electric servo cylinder is preferably used for adjusting steering frames.
Disadvantages connected with hydraulic systems (oil, leakage, etc.) are avoided. The electro servo cylinder is also suitable for other applications where a load is moved or positioned (adequate dimensioning provided).
Functional description:
The electric servo cylinder is a electric mechanical linear actuator. It fundamentally consists of the following main components:
▪ electric motor (standard: three-phase asynchronous motor)
▪ spindle converter PGT (planetary gear) with piston rod
▪ housing block with bearing, safety clutch, trunnion
▪ housing made from extruded aluminium, including position-independent grease lubrication
▪ end position cushioning (Belleville springs)
▪ Stroke transducer digital
Optional:
▪ locking brake
▪ Adjustable limit switches
▪ Stroke transducer (analogue)
▪ external fan
▪ Automatic lubrication system incl. cartridge and elect. control with EMG iCON® SE strip position controller
The electric motor, which is actuated via a frequency converter (FC), is used to drive the threaded spindle. The rotation of the spindle is
converted into a linear movement in the spindle converter. The speed of the push tube and the speed of the electric motor are not proportional to one another due to the slip in the PGT. An analogue input voltage for the frequency converter (setpoint) means the ESZ electric
servo cylinder can be continuously controlled in terms of force and direction in the same way as a hydraulic cylinder with a servo valve.
The FC operates in V/f control as standard; vector control is required for applications with a permanently high load. The ESZ must be
cooled in this setup by an optional separate fan.
Block diagram
1 Power supply
2 Messages
3 Braking resistor
4 three-phase motor
5 Control
Data sheet
Document No.: DB_ESZ_02_en
Document-ID: EMGDES-00003023
1
EMG Automation GmbH / Industriestraße 1 / 57482 Wenden (Ger) Tel. + 49 (0) 27 62 / 612 - 0
Fax. + 49 (0) 27 62 / 612 - 384
info@emg-automation.com
Actuators
Technical data
Construction series
10
25
50
100
Maximum force
10 kN
25 kN
50 kN
100 kN
Electric motor (4 pole) 3x400 V, 50 Hz
1.1 kW
2.2 kW
4.0 kW
11 kW
Nominal adjusting speed
30 mm/s
30 mm/s
30 mm/s
30 mm/s
Maximum speed
70 mm/s
70 mm/s
50 mm/s
30 mm/s
Nominal stroke (standard strokes)
100 mm, 200 mm, 300 mm, 400 mm, 500 mm, 700 mm
(other strokes on request)
Ambient temperature
0 °C ... +50 °C (standard)
0 °C ... +70 °C (with separate fan)
Protection type
IP 54
Maintenance interval (as a function of load and temperature)
1000 h … 5000 h
approx. 10 cm3 … 20 cm3 with Mobiltemp SHC32 (from Mobil Oil)
Refill grease quantity (each maintenance procedure)
CE compliant
yes
load profile
Short-term stroke operation 10% ED S3
1 min
with 100 % load
with 100 % speed
9 min
with 0 % load
with 0 % speed
Control mode (continuous operation) strip guiding system
99 % time
1 % time
with 20 % load
with 20 % speed
with 100 % load
with 20 % speed
Type code
ESZ 25 400 / F / A / L / / SI / D / 21
ESZ
Electric servo cylinder, ESZ series
25
Installation size: 10, 25, 50, 100 (maximum force in kN)
400
Nominal stroke in mm (standard):
100; 200; 300; 400; 500; 600; 700, (other strokes on request)
ESZ basic configuration (standard, equipped with):
▪ three-phase asynchronous motor with 3 thermal sensors
▪ internal end position dampening
▪ position-independent lubrication
F
F = locking brake, non-ventable at U = 0V
FL = locking brake, ventable at U = 0V
A
A = external adjustable limit switch
L
L = separate fan for cooling (ambient temperatures > 50°C, or in vector control; vector control is required for a sustained high
load)
SC
Stroke transducer:
[SC] = CANopen-converter (MTS-SSI-stroke transducer, digital)
[SI] = CANopen-converter (Novotechnik-SSI-stroke transducer, digital)
[W] = analogue linear stroke transducer LWH
[T] = analogue stroke transducer Temposonics
[P] = PROFIBUS-DP (digital)
[C] = CAN-Bus encoder
D
D = three-phase asynchronous motor
S = servo motor
G = direct current motor with transmission
21
Version: 21 = 3rd generation
Data sheet
Document No.: DB_ESZ_02_en
Document-ID: EMGDES-00003023
2