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Datasheet
WTC3 HUB MODULE 2 Hydraulic pitch controller module for wind turbine pitch systems which uses proportional valves.
Datasheet revised: 2015-07-22. Version no. 0.8
Contents 1 2 3 4
5 6
7 8
9 10 11
12
13
Introduction ........................................................................................................................ 4 1.1 Part numbers .................................................................................................................. 4 Important note ................................................................................................................... 4 Features .............................................................................................................................. 5 Supplies .............................................................................................................................. 6 4.1 Board AC supply input .................................................................................................... 6 4.2 24 VDC valve supply with voltage monitoring ................................................................. 6 4.2.1 Measurement of valve supply ............................................................................ 6 4.3 Transducers supply ......................................................................................................... 7 Environmental data ............................................................................................................. 8 5.1 Temperature .................................................................................................................. 8 Input ................................................................................................................................... 9 6.1 Analog current input ....................................................................................................... 9 6.2 Digital input .................................................................................................................... 9 6.3 RS485 encoder interface ............................................................................................... 10 6.4 Linear position sensor interface .................................................................................... 10 6.5 RS485 interface (TCM) .................................................................................................. 11 6.6 Valve slider position feedback ...................................................................................... 11 On-board sensors .............................................................................................................. 12 7.1 Two axis accelerometer ................................................................................................ 12 Output .............................................................................................................................. 13 8.1 Digital output................................................................................................................ 13 8.2 PWM valve output with current measurement ............................................................. 13 Fuses................................................................................................................................. 14 Ethernet ............................................................................................................................ 15 CAN-bus ............................................................................................................................ 16 11.1 CAN setup..................................................................................................................... 16 11.1.1 CAN address ..................................................................................................... 16 11.1.2 CAN bitrate ...................................................................................................... 16 11.2 Electrical interface ........................................................................................................ 17 11.3 Protocol ........................................................................................................................ 17 11.4 Parameters ................................................................................................................... 17 Pitch control ..................................................................................................................... 19 12.1 Linear pitch encoder ..................................................................................................... 19 12.2 4-20mA pitch encoder .................................................................................................. 20 LED indicators ................................................................................................................... 21 13.1 32 Vac Power ................................................................................................................ 21 13.2 +24 v Val Supply ........................................................................................................... 21 13.3 Module status............................................................................................................... 21 13.4 Digital Input .................................................................................................................. 22 13.5 Digital Output ............................................................................................................... 22 13.6 BILL (RS485 encoder interface) ..................................................................................... 22
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14 15 16 17
13.7 MTS (Linear position sensor)......................................................................................... 22 13.8 TCM (RS485 interface) .................................................................................................. 22 13.9 CAN Rx/Tx..................................................................................................................... 22 13.10 Ethernet ....................................................................................................................... 23 13.11 Valve Slide .................................................................................................................... 23 13.12 PWM Output A, B & C ................................................................................................... 23 Standards.......................................................................................................................... 24 14.1 EMC standards.............................................................................................................. 24 Module view ..................................................................................................................... 25 Mechanical ....................................................................................................................... 26 16.1 Mounting plate ............................................................................................................. 26 Appendix .......................................................................................................................... 27 17.1 Valve supply inrush current .......................................................................................... 27 17.1.1 Supply impedance 0.25 Ω ................................................................................. 27 17.1.2 Supply impedance 1.0 Ω ................................................................................... 28 17.2 Board AC Supply inrush current .................................................................................... 29
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1 Introduction The WTC3 Hub module 2, is the second generation hydraulic pitch control module from KK Wind Solutions. It is designed to be installed in a wind turbine hub, and control a hydraulic pitch system. The module can control up to 3 proportional valves, each one typically used for pitching a wind turbine blade. The Hub module 2 controls the current in the solenoids of the proportional valve directly, and does not need proportional valves within build in control electronics. The module can use both proportional valves with slider feedback (differential transformer) and without. The module is also able to use both linear position sensors, typically build into the hydraulic pistons, or simple 4-20mA encoders.
1.1
Part numbers
This datasheet covers the following part numbers.
V5514 ........................................... : Standard edition.
2 Important note
ESD (Electro Static Discharge) sensitive devices on Printed Circuit Board. Take the necessary precautions when working on ESD sensitive parts.
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3 Features • • • • • • • • • • • • • • • • • • • •
Control of 3 wind turbine blade pitch positions using proportional valves Control of 3 proportional valve slider positions for valves with differential transformer Control of 6 proportional valve solenoid currents (2 for each valve) 2 x digital output (PNP) 2 x digital input (PNP) 6 x analog current input ( 2 - 22 mA) 6 x Pulse-Width Modulated output with current measurement and overload protection 3 x Slide position input ( Differential transformer ) 3 x Linear position sensor interface 3 x RS485 encoder interface (Leine Linde - BiLL protocol) 3 x RS485 multidrop interface (TCM) CAN interface Selectable CAN bitrate Selectable CAN address Two axis accelerometer Ethernet interface for high speed data logging Module status read out via LEDs and CAN-interface Power supply 32VAC ±30% Self-diagnostics Power supply monitoring
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4 Supplies 4.1
Board AC supply input
Main supply for the whole board. Used for internal power and regulated 24VDC supplies for transduceres. The supply for PWM output for valves are not included. Input voltage ................................. : 32VAC +/- 30% Input current ................................. : max. 1.3A @ min. input voltage Max. inrush current half wave ....... : ~40A peak (source impedance ~0.25 ohm, See appendix) Input frequency ............................ : 47..63Hz Fuse .............................................. : 3.15AT 250V CPU power after power down ....... : min. 100 ms. GENConnector X12 – ACPOWER
4.2
Pins PE 0VAC 32VAC
Function Protective earth AC 0V reference 32VAC supply input
24 VDC valve supply with voltage monitoring
Input for 24VDC supplying the PWM Valve output circuit on board. Input voltage ................................. : 24V +/- 20% Input current ................................. : max. 10A Input capacity ............................... : max. 11.3 mF Input inrush current @ RGEN= 1 Ω .. : 24APEAK / 17AAVAGE in 10ms (See Appendix) Connector X30 - DC_POWER_IN
Pins GND GND +24V +24V
Function GND input GND input 24 VDC input 24 VDC input
4.2.1 Measurement of valve supply Measure accuracy ......................... : +/- 2 % Sample frequency ......................... : 833 Hz Average filter ................................ : 1..65535 Samples Update interval (process telegram): 1..65535 ms Measure range .............................. : 0..27V Measure resolution ....................... : 12 bit
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4.3
Transducers supply
+24V is available for transducers connected to the module. This supply is accessed in each connector. The supply are generated form the 32VAC supply input. Output voltage .............................. : +24VDC +/- 10% Output current Group: BILL - MTS - TCM ............. : 750 mA max. total Group: AI - DI - DO ...................... : 750 mA max. total
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5 Environmental data 5.1
Temperature
Operating temperature range ....... : -40..70°C Storage temperature range ........... : -40..85°C
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6 Input 6.1
Analog current input
The analog inputs can be used for either general purpose inputs or for pitch angle encoder inputs. If used for pitch encoders, input 1, 2 and 3 should be used for the three blades. Number of inputs .......................... : 6 Input range ................................... : 2..22 mA Resolution ..................................... : 12 bit Input resistance ............................ : 200 Ω Accuracy ....................................... : +/- 1% full scale Sample frequency ......................... : 833 Hz Average filter ................................ : 1..65535 Samples Update interval (process telegram): 1..65535 ms Connector X1 – AIN1 X2 – AIN2 X3 – AIN3 X4 – AIN4 X5 – AIN5 X6 – AIN6
6.2
Pins
Function
GND
GND
S
Signal input
+24V
Supply for transducer
Digital input
The 2 digital inputs are used for safety loop inputs. In order for the module to consider the safety loop closed, DI1 should be off and DI2 should be on. In all other combinations the safety loop is considered open, and the module will go into emergency stop state. Number of inputs .......................... : 2 Input type ..................................... : PNP Input resistance ............................ : Nom. 1600 Ω Input ON ....................................... : >17,5VDC Input OFF ...................................... : > 0A 0s 1
2ms V(Rgen:2)
2
4ms -I(Cload)
6ms
8ms
10ms
12ms
14ms
16ms
18ms
20ms
Time
Green = Voltage on input (Y axis 1) Read = Current (Y axis 2)
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17.1.2
Supply impedance 1.0 Ω
24
20
16
12
8
4
0 0s V(Rgen:2)
2ms 4ms -I(Cload)
6ms
8ms
10ms
12ms
14ms
16ms
18ms
20ms
Time
Green= Voltage on input Read= Current
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17.2
Board AC Supply inrush current
The board has some capacity in the supply circuit and when power is applied it will result in Inrush currents of higher levels. A simulating of the circuit results in the following graph: 60
40
20
-0
-20
-40
-60 0s
2ms 4ms V(C2:+) I(RGEN1)
6ms V(V1:+,V1:-)
8ms
10ms
12ms
14ms
16ms
18ms
20ms
22ms
24ms
26ms
Time
Voltage = 32VAC Generator impedance = 0.25 ohm Green = AC Voltage on input Blue = AC Current on input Red = Voltage inside circuit after diode bridge. Note: An inductor on the input limits the current raise and that results in a relative little inrush current.
Liability note This document has been prepared with care. The product described is, however, constantly under development. For this reason the document may not in every case have been checked for consistency with regards to performance data, standards or other characteristics to the products delivered. In the event that this document contains technical or editorial information not reflected in the products delivered, we reserve the right to make alterations to this document at any time and without prior warning. The data, diagrams, descriptions and other information in this document shall not in any way form the basis of a direct or indirect claim against us if the products have been delivered and the modifications in the products are not reflected in this document.
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