PVEP Electrohydraulic Actuator Product Electrical ... - Sauer-Danfoss

PVEP
Electrohydraulic
Actuator
Product Electrical
Installation
Technical
Information

Revision History
2 11022662 • Rev BA • Feb 2010
PVEP Electrohydraulic Actuator
Product Electrical Installation Technical Information
Revisions
Table of Revisions
Date Page Changed Rev.
8 Feb, 2010 5-6 Proportional Valve Body drawing updated;
Basic Concept/ Controller and PVEP drawing updated
BA
4 Apr, 2007 AA
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Danfoss Group.
Front cover illustrations: F301383, 2412

PVEP Electrohydraulic Actuator
Product Electrical Installation Technical Information
Contents
Product Overview Product Image ................................................................................................................................................. 4
Code/ Part Numbers ...................................................................................................................................... 4
Description/ Theory of Operation ............................................................................................................ 5
Hydraulic Schematics .................................................................................................................................... 7
Electrical Specifications ................................................................................................................................ 7
Electrical Installation Pinout ................................................................................................................................................................. 8
Pin Compatibility ............................................................................................................................................ 8
Input/ Output Matrix ..................................................................................................................................... 8
Mating Connector .......................................................................................................................................... 8
Literature References Refer to PVG 32 Proportional Valves Technical Information 520L0344, PVG 100 Proportional
Valves Technical Information 520L0720, PVE Series 4 for PVG 32, PVG 100 and PVG 120
Technical Information 520L0553, Instructions for PVG Series 4 for PVEP 520L0921 for
complete product electrical and mechanical specifications.
Refer to PVEP Compliant Function Block User Manual 11020634 for compliant function
block set-up information.
Technical literature is available at: www.sauer-danfoss.com
11022662 • Rev BA • Feb 2010
3

Product Image
4 11022662 • Rev BA • Feb 2010
PVEP Electrohydraulic Actuator
Product Electrical Installation Technical Information
Product Overview
The PVEP has two low frequency PWM inputs that determine the set point for main spool
control in the valve. This differs from the standard PVE programme where an analogue
ratio metric signal forms the input set point to the valve.
The PVEP will be available in two versions, a standard PVEP and a PVEP-F for valves with
float position option.
This tech note will cover the control functionality for the PVEP.
Code/ Part Numbers PVEP
PVEP proportional actuation Deutsch® DT connector
Standard PVEP 157B4752

Description/
Theory of Operation
PVEP Electrohydraulic Actuator
Product Electrical Installation Technical Information
Product Overview
The philosophy of Sauer-Danfoss electrohydraulic actuation, type PVE, is integration
of electronics, sensors and actuators into a single unit that interfaces directly to the
proportional valve body.
Proportional Valve Body
P
p
11022662 • Rev BA • Feb 2010
T
P
T
V310134.A
Closed Loop Control
All the proportional actuators feature an integrated feedback transducer that measures
spool movement in relation to the input signal, and by means of a solenoid valve
bridge, controls the direction, velocity and position of the main spool of the valve.
The integrated electronics compensate for flow forces on the spool, internal leakage,
changes in oil viscosity, pilot pressure, etc. This results in lower hysteresis and better
resolution. Furthermore the electronics enable built in safety like fault monitoring,
directional indication and LED light indication.
Closed Loop Control Schematic
Set Point Solenoid
Valve Bridge
Feed Back Signal
Transducer
Spool or
Piston
Spool Position
157-503.10
5

Description/
Theory of Operation
(continued)
Set point
Position
PWM
to
- +
11 - 32 V
-
6 11022662 • Rev BA • Feb 2010
PVEP Electrohydraulic Actuator
Product Electrical Installation Technical Information
Product Overview
Concept
Basic Concept/ Controller and PVEP
Driver
A
Sense
- Driver
B
Sense
PVE
Valve
inch
0.3
0.2
-0.2
-0.3
Spool travel
mm
7.5
5.5
-5.5
-7.5
Proportional
Control range
Float posistion
80% 90%
PWM B ratio
[%]
PWM A ratio
V310137.A
The PVEP is driven by two low current PWM inputs, called PWM_A and PWM_B. The duty
cycle of the PWM signal determine the spool position.
Duty Cycle Definition
T = Period [s]
Duty cycle [%] = (ti/T) * 100%
ti = Time impulse (< V bat)
ti tp tp = Time pause ( 0 voltage)
In the PVEP the duty cycle of the pulse is measured as a true time difference
measurement. The PVEP interprets the duty cycle and positions the spool accordingly.
2410

Hydraulic Schematics PVEP
PVEP Electrohydraulic Actuator
Product Electrical Installation Technical Information
Product Overview
U s
Input
Signal
LVDT
Signal
PWM
Electrical Specifications The following technical data is from typical test results. For the hydraulic system
a mineral based hydraulic oil with a viscosity of 21 mm 2 /second [102 SUS] and a
temperature of 50° C [122° F] were used.
Specifications
Supply voltage Vbat range 10 to 32 Vdc
Supply voltage Vbat maximum ripple 5%
Supply voltage Vbat over voltage (maximum 5 minutes) 36 Vdc
PWM control range (duty cycle) 10 to 80 %
PWM float position control PWM_A = PWM_B = 90%
PWM frequency 100 to 1000 Hz
PWM input voltage swing 0 to > Vbat
PWM input low voltage 0 to 0.6 Vdc
PWM input high voltage 5 to 32 Vdc
Input impedance (standard pull down) 5 kΩ
Input capacitor --
Power consumption 7 W
Error voltage (fault monitoring) No fault = 0 Voltage Fault = Vbat
All connector terminals are short circuit protected and protected against reverse connection
(and their combinations)
The main spool position feedback via the LVDT enables PVEP to control the proportional
valve main spool very smoothly and accurately with a hysteresis of typical 3 to 4%. PWM
frequency can be chosen between 100 to 1000 Hz for A or B channel.
�Warning
It’s up to the customer to decide on the required degree of safety for the system.
11022662 • Rev BA • Feb 2010
7

Pinout Pinout
8 11022662 • Rev BA • Feb 2010
PVEP Electrohydraulic Actuator
Product Electrical Installation Technical Information
Electrical Installation
Pin Connector
1 PWM_A
2 Error
3 PWM_B
4 No connection
5 Ground
6 U DC
Pin Compatibility PLUS+1 Module Pin Type/ PVEP Pin Compatibility
Input/ Output Matrix PVEP Input/ Output Matrix
Pin Location
PLUS+1 module pin type Acceptable use: Deutsch® connector pin number
DOUT/PVG Pwr 1-3 6
PWMOUT/DOUT/PVGOUT 1-3 1, 3
Power ground - 5
Dig in 2
Duty cycle A-signal
(pin 1)
Duty cycle B-signal
(pin 2)
3
2
1
4
5
6
Function
2411
Error pin output
(pin 3)
0% 0%

Notes
PVEP Electrohydraulic Actuator
Product Electrical Installation Technical Information
Notes
11022662 • Rev BA • Feb 2010
9

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11022662 • Rev BA • Feb 2010
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