Proportional electrohydraulic controls for PVPC pumps pressure-flow combined P/Q controls, analog or digital

Transcription

1 Table A70/E Proportional electrohydraulic controls for PVPC pumps pressureflow combined P/Q controls, analog or digital The variable displacement axial piston pumps type PVPC, can be supplied with advanced electrohydraulic proportional controls: open loop pressure control; load sensing control of the flow; P/Q controls, a complete range with open or closed loop regulation of pressure and flow. These controls perform high dynamics and fine regulations, directly commanded from PC or from the machine controller. They are available with separated driver or with integral electronics. New digital controllers, integrated to the pump, realize combined closed loop controls of pressure, flow and max power limitation and they are also available with optional sequence module ( version) that allows to operate the pump with minimum pressure in the circuit close to zero. Following communication interfaces are available for the digital PE(R)S execution, see section 7: PS: RS serial communication interface PVPCPS06 BC: CANbus interface BP: PROFIBUSDP interface For technical characteristics and features of MODEL CODE the PVPC pumps, see table A. PVPC XE BC 06 /0 / * / D / 8 0 /* Variable displacement axial piston pump Additional suffix for double pumps XE = with a fixed displacement pump type PFE (see tab. A00) Series number Synthetic fluids: WG = waterglycol PE = phosphate ester See notes, section Type of control (see section, 6 and 7): = proportional pressure compensator = proportional flow control (load sensing) = proportional pressure & flow control (load sensing) R = as plus sequence module = closed loop integral digital P/Q controller = as plus sequence module Communication interface, only for and versions PS = RS serial BP = PROFIBUSDP BC = CANBus Size: = for displacement 09 = for displacement 06 = for displacement 07 and 090 Max displacement of axial piston pump: 09 = 9 cm /rev 06 = 6 cm /rev 07 = 7 cm /rev 090 = 88 cm /rev Type of PFE (for double pumps), see tab. A00 Pressure setting (only for and ): 00 = 00 bar 0 = 0 bar 80 = 80 bar (not available for 090) ) pumps with ISO 09/ mounting flange and shaft (option /M) are available on request Options, see sections and 7: 8 = with 8 VDC coil instead of standard VDC coil (only for,, ) for versions and PE(R)S: C =predisposed to receive 0 ma feedback signal from the remote pressure transducer X =with integral pressure transducer (only for ) S =additional closed loop pressure control with multiple PID parameters set only for PS Z =as S but with double power supply, enable and fault only for BC and BP Direction of rotation (viewed at the shaft end) D = clockwise S = counterclockwise Shaft (SAE Standard): = keyed (7/8 for 09 for 06 / for 07 and 090) = splined ( teeth for 09 for 06 for 07 and 090) OPERATING CHARACTERISTICS Pump model PVPC*09 PVPC*06 PVPC*07 PVPC*090 External load position Displacement [cm /rev] Theorical max flow at 0 rpm [l/min] 66,7 0,8 7,6 Max working pressure / Peak pressure[bar] 80/0 80/0 80/0 0/ Min/Max inlet pressure [bar abs.] 0,8 / 0,8 / 0,8 / 0,8 / Max pressure on drain port [bar abs.],,,, Power consumption at 0 rpm and at [kw] 9,9,6 0,, maximum pressure and displacement Type Type Type Type Type Type Type Type Max torque on the first shaft [Nm] Max permissible load Fax [N] on drive shaft Frad Speed rating [rpm] Fax = axial load Frad = radial load Notes: For speeds over 800 rpm the inlet port must be under oil level with adequate pipes. Maximum pressure for all models with option /WG is bar, with option /PE is 90 bar. Max speed with options /WG and /PE is 000/900/0/00 rpm respectively for the four sizes. A70

2 MAIN CHARACTERISTICS OF VARIABLE DISPLACEMENT AXIAL PISTON PUMP TYPE PVPC Installation position Any position. The drain port must be on the top of the pump. Drain line must be separated and unrestricted to the reservoir and extended below the oil level as far from the inlet as possible. Suggested maximum line lenght is m. Ambient temperature from 0 C to +70 C for versions with separated electronics / from 0 C to + C for versions / Fluid Hydraulic oil as per DIN...; for other fluids see section Recommended viscosity 00 mm /sec at 0 C (ISO VG 00). Maximum startup viscosity: 000 mm /sec Fluid contamination class ISO 6/ (filters at 0 µm value with ß0 7 recommended) Fluid temperature 0 C + C 0 C +0 C (seals /WG) 0 C +80 C (seals /PE) LVDT electric characteristics (, versions) Supply + VDC / ma; VDC / ma; Signal 0, VDC. Coils characteristics Coil resistance R at 0 C Pump size Pump sizes,, Ω for standard VDC coil;, Ω for 8 VDC coil (only for version,, *),8, Ω for standard VDC coil;, Ω for 8 VDC coil (only for version,, *) Max solenoid current,6 A for standard VDC coil;, A for 8 VDC coil (available only for version,, *) Max power Watt Protection degree (CEI EN9) IP6 for, and ; IP6 67 for versions with integral electronics (see section.) Duty factor Continuous rating (ED = 00%) OPTIONS FOR AND. Option /X (only for ) Option providing the presence of the pressure transducer, with output signal 0 ma, integral to the pump and factory wired to the electronics through a cable gland.. Option /C The pump electronics is set to receive 0 ma feedback signal from the remote pressure transducer, instead of the standard 0 0 V.. Option /S (only for version PS) Option providing up to set of PID pressure parameters real time selectable during the axis motion via onoff signals to the poles connector to optimize the control performances in the different phases of the machine cycle. For additional information and for the electrical wiring, see sez 9.. Option /Z (only for versions BC and BP) Option providing the same characteristics of option /S plus additional double power supply, enable and fault. The multiple set of PID pressure parameters can be real time selected during the axis motion through the BC or BP interfaces, to optimize the control performances in the different phases of the machine cycle. The double power supply is specifically introduced for BC and BP fieldbus interfaces and it provides two separated power supplies for the digital electronic circuits and for the pilot valve power supply stage. It allows to interrupt the pump functioning by cutting the solenoid power supply of the pilot valve (e.g. for emergency, as provided by the European Norms EN9 for components with safety class ), but keeping energized the digital electronic circuits, thus avoiding fault conditions of the machine fieldbus controller. For additional information and for the electrical wiring, see sez 9.. Model codes of power supply and communication connectors PUMP VERSION,,, RS (PS) OR CANBUS (BC) only for and PROFIBUS (BP) only for and PRESSURE TRANSDUCER only for PE*/S, /Z CONNECTOR CODE SP666 SPZHP () SPZHP () SPZHP/BP () SPZHPM8 / ()() PROTECTION DEGREE IP6 IP6 IP67 IP67 IP67 () to be ordered separately () M8 connector moulded on cable mt lenght PROGRAMMING DEVICES FOR PVPC* AND PVPC* The functional parameters of the digital valves, as the bias, scale, ramp and linearization of the regulation characteristic, can be easily set and optimized with graphic interface by using the following software programming devices suitable for standard PC: KITESWPS for electronics with RS interface (option PS) KITESWBC for electronics with CANbus interface (option BC) KITESWBP for electronics with PROFIBUSDP interface (option BP) see tab. G00 for complete information about the programming device kits and for the PC minimum requirements. Only for the BC and BP communication options, the functional parameters can be alternatively set via fieldbus through the machine control unit, using the standard communication protocol implemented by Atos. The protocol operating instructions to be implemented in the standard protocols (DS0V.0, DSP08 for CANbus and DPVO for PROFIBUSDP) are described in the user manuals MANSBC (for BC option) and MANSBP (for BP option) supplied with the relevant programming device kits. The above programming devices have to be ordered separately.

3 6 ELECTROHYDRAULIC CONTROLS Proportional pressure compensator The pumps displacement, and thus the flow, remains constant as far the pressure in the circuit reaches the value set on the proportional pilot valve, then the flow is reduced to maintain the circuit pressure to the value set by the electronic reference signal to the proportional valve. In this conditions the pressure in the circuit can be continuosly modulated by means of the reference signal. Proportional pressure setting range: see below pressure control diagram. Compensator setting range : 0 0 bar ( bar for 090) Compensator factory setting : 80 bar (0 bar for 090) Flow [l/min] Pressure [bar] Isteresi ed incremento pressione; max bar Proportional flow (loadsensing) Open loop control of the flow rate via an reference signal to the electronic driver of the pilot proportional valve. This energy saving control regulates the outlet pressure up to the minimum level required to operate the flow set by the reference signal to the proportional valve. Flow [l/min] Pressione [bar] R Proportional pressure & flow (load sensing) Open loop control of pressure and flow via two reference signals to the electronic drivers of the two pilot proportional valves. This energy saving control regulates the outlet pressure up to the minimum level required to operate the flow set by the reference signal. In addition the proportional pressure control reduces the outlet flow, as per control once max pressure is reached. Minimum regulated pressure: bar For lower minimum regulated pressure, consult our technical office. Maximum allowed pressure: 0 bar Flow and pressure proportional control with sequence module. Same construction concept of control, in addition it is equipped with RES sequence module which ensures the minimum pump piloting pressure in case the system pressure drops below the minimum value (8 bar). Flow [% of max] Pressure [% of max] Flow reference [% of max] Pressure reference [% of max] Pump size cm /rev Diagrams for,, Regulation diagrams = Flow control = Pressure control () for standard VDC coil () for 8 VDC coil Regulated flow [l/ min] Regulated pressure [bar] () () Driving current [ma] () Driving current [ma] () A70

4 7 P/Q DIGITAL CONTROLLER Pressure transducer not included Pressure transducer included only for Digital P/Q controller integrates the combined pressure and flow regulation with the electronic max power limitation. A remote pressure transducer must be installed on the system and its feedback has to be interfaced to the pump digital driver. If the real value of the pressure in the system (measured by the pressure transducer) remains below the relevant reference signal, provided by the machine controller, then the digital driver regulates in closed loop the pump swash plate position, according to the flow reference signal. When the real pressure become close to the relevant reference signal, the driver automatically performs the closed loop control of the pressure. This option allows to realize accurate dynamic pressure profiles. Following communication interfaces are available: PS, RS serial communication interface. The pump reference signals are provided with analog commands via the pins connector BC, CANbus interface BP, PROFIBUSDP interface In the BC and BP executions the pump reference signal are provided via fielbus; during start up or maintenance, the pump can be operated with analog signals via the pins connector. The digital control ensures high performances as flow and pressure linearity (see diagram ), better flow knee (see diagram ), internal leakage compensation (controlled flow independent to the load variations). PVPC basic version, without sequence module and without pressure transducer, which has to be installed on the main line and wired to the poles connector of the integral digital electronics. PVPC version with sequence module RES which grant a minimum piloting pressure (8 bar) when the actual pressure falls below that value. Without pressure transducer. Response time Displacement [%] Type pump PVPCPE(R)S09 PVPCPE(R)S06 PVPCPE(R)S07 PVPCPE(R)S090 d d d [ms] d d Time [ms] Response time of displacement variation for a step change of the electronic reference signal. Regulated flow P/Q control Displacement [%] Reference Regulated flow [l/min] Feedback Reference [%] Operating pressure [bar]

5 8 ELECTRONIC AND WIRING BLOCK DIAGRAM PVPCPE(R)S For the electric wiring shielded cables must be provided: the shield must be connected to the power supply zero on the generator side, see tab. F00 DC/DC CONVERTER Fieldbus INTERFACE RAMPS LINEARIZATION BIAS SCALE HYDRAULIC POWER LIMITATOR POWER SUPPLY CONNECTOR (front view) PRESSURE TRANSDUCER CONNECTOR option /S and /Z CABLE GLAND CONNECTION FOR OPTION /X COIL PILOT FEEDBACK SWASHINGPLATE FEEDBACK COMUNICATION CONNECTOR (front view) POWER SUPPLY CONNECTOR COMMUNICATION CONNECTOR PIN DESCRIPTION SIGNAL SIGNAL power supply VDC Stabilized: + VDC power supply zero Filteredrectified: Vrms (ripple max Vpp) Fault Signal zero Alarm = 0 VDC Reference 0 VDC Correct functioning = + VDC PE Input Q Monitor Q Pressure input signal Pressure monitor Power limitation enable Pressure feedback + VDC Pressure feedback 0 Earth 0 0 VDC (referred to pin ) 0 0 VDC (referred to pin ) 0 0 VDC (referred to pin ) 0 0 VDC (referred to pin ) > 9 to + VDC 0 0 VDC pressure feedback (not connected with option /X) 0 ma with option /C Connect only with supply not conforming to VDE 0 (CEI 6/6) Communication option PIN number Signal description PS (RS) Male connector NC Not connected NC Not connected RS_GND Signal zero data line RS_RX valves receiving data line RS_TX valves transmitting data line BC (CAN Bus) Male connector CAN_SHLD Shield NC Not connected CAN_GND Signal zero data line CAN_H Bus line (high signal) CAN_L Bus line (low signal) BP (PROFIBUSDP) Female connector (reverse key) +V Termination voltage LINE A Bus line (high signal) DGND Signal zero data line / termination voltage LINEB Bus line (low signal) SHIELD Shield Notes: Electrical signals (e.g. feedback signals) acquired via valve electronics must not be used to switch off the machine safety functions. This is in accordance with the European standards (Safety requirements of fluid technology systems and components hydraulics, EN 98). Installation notes with basic information for commissioning and startup are always supplied with the relevant components, together with the specific technical tables. 9 CONNECTION PVPCPE(R)S/S and PVPCPE(R)S/Z for detailed information, see tab. G POWER SUPPLY CONNECTOR (OPTION /S) only for /PS POWER SUPPLY CONNECTOR (OPTION /Z) only for /BC and /BP PIN SIGNAL DESCRIPTION TECHNICAL SPECIFICATION PIN SIGNAL DESCRIPTION TECHNICAL SPECIFICATION Power supply VDC (power stage) Stabilized: + VDC Power supply VDC (power stage) Stabilized: + VDC Power supply 0 VDC (power stage) Filtered and rectified: Vrms (ripple max Vpp) Power supply 0 VDC (power stage) Filtered and rectified: Vrms (ripple max Vpp) Enable Enabling input normal working VDC Enable Enabling input normal working VDC Flow input signal ± 0 VDC 0 0 VDC Flow input signal ± 0 VDC 0 0 VDC Signal zero Reference 0 VDC Signal zero Reference 0 VDC 6 Flow monitor ± 0 VDC referred to pin 6 Flow monitor ± 0 VDC referred to pin 7 Pressure input signal ± 0 VDC 0 0 VDC 7 Pressure input signal ± 0 VDC 0 0 VDC 8 Pressure monitor ± 0 VDC referred to pin 8 Pressure monitor ± 0 VDC referred to pin 9 0 PID selection (see section.) Zero or + VDC 9 0 Power supply VDC (logic stage) Stabilized: + VDC Power supply 0 VDC (logic stage) Filtered and rectified: Vrms (ripple max Vpp) Fault Alarm = 0 VDC Correct functioning = + VDC Fault Alarm = 0 VDC Correct functioning = + VDC PE Earth Connect only when the power supply is not PE Earth Connect only when the power supply is not conform to VDE 0 (CEI /6) conform to VDE 0 (CEI /6) 9. Pressure transducer connector (options /S and /Z) The pressure transducer and the poles connectror type SPZHPM8/ have to be ordered separately. See tab. G for the pressure transducer. PIN options /S and /Z option /C (Ri = 6 Ω) Pressure real value Pressure signal Common zero for power supply and signal Reserved (do not connect) Transducer power supply VDC Power supply Reserved (do not connect) Reserved (do not connect) PRESSURE TRANSDUCER CONNECTOR options /S and /Z (front view)

6 9 DIMENSIONS OF PVPC PUMPS VERSION VERSION VERSION VERSION R VERSION VERSION VERSION (dotted line) Pressure transducer () = Regulation screw for max displacement. Adjustable range 0% to 00% of max displacement (not available for versions, and ). In case of double pump the regulation screw is not always available, please contact our technical office. Drawing shows pumps with clockwise rotation (option D): pumps with counterclockwise rotation (option S) will have inlet and outlet ports inverted and consequently also the position of the control devices. Pump type PVPC*09 PVPC*06 PVPC*07 PVPC*090 PVPC*09 PVPC*06 PVPC*07 PVPC*090 Version R R R A , 7, 7, B C D , 6, 6, 6, 6, 6, E 6, 6, Mass (kg) 7, 8,6 7, 6,9 7,6,6 6 6, 7,6,7, 6,6 6,7 7, 0/06