DVA-Kit with an intelligent drive controller The electronically adjustable fixed displacement pump from HYDAC KineSys

Simple pressure control: rely on HYDAC drive technology for your optimum solution and discover our pre-assembled, tested and pre-set pressure supply unit. For universal use wherever constant pressure supply or variable pressures are needed during the machine cycle.

Minimal power dissipation thanks to function-optimised drive solutions from HYDAC

The best drive technology for your all-round carefree package: get advice on your tailor-made speed-controlled drive solution now.

Contact us now

Our solution: HYDAC DVA-Kit with an intelligent drive controllerThe perfect symbiosis of hydraulics and electrical engineering

As a plug & play unit, our compact drive with a motor-mounted drive controller enables variable-speed hydraulic pressure supply for your applications with an output of 0.55 kW to 22 kW. The fully assembled, tested and pre-set intelligent pressure supply unit is for versatile use wherever pressure needs to be regulated. The drive controller parameterisation is tailored to your system – regardless of the task at hand. For example, a boost function can be used for a temporary increase in the flow rate requirement in your system. The motor-mounted drive controller also means that almost any hydraulic unit can be retrofitted – as a switch cabinet is not required.

Technical information:

  • Asynchronous motor
  • Robust hydraulic gear pump
  • Intelligent drive controller with control circuits, networking and safety functions such as STO
  • Wide input voltage range
  • 3x 400 V (360 to 480 V)
  • 1x 230 V (180 to 250 V)
  • Reduced energy input into the system
  • No switch cabinet needed
     

HYDAC drive technology: this makes all the difference

Simple integration & parameterisation With HYDAC KineSys, your system is ready for immediate use

We offer you an all-round carefree package: as an intelligent pressure supply unit that is easy to integrate, HYDAC variable-speed drives are ready for immediate use – you don't need any cross-system expertise in hydraulics, electrics and control technology. There is also no need to assemble individual components. Thanks to the drive controller permanently mounted on the motor-pump group, there is also no need for switch cabinet installation. This avoids possible sources of error during commissioning. Our interdisciplinary HYDAC KineSys team of hydraulic engineers, mechanical engineers, electrical engineers and automation specialists brings all the pieces of the puzzle together.

Reduced complexity Straightforward drive technology for more efficiency

Thanks to our straightforward technology, all sensors and drive details can be networked with a controller via a communication interface on the drive controller – the sensors and control system required for this are already electrically connected and synchronised. This means that your system can be used straight away without any additional expertise. The plain text error code on the HYDAC drive controller also enables simple troubleshooting and error analysis. But that's not all: thanks to the pre-assembled and pre-set unit made up of a motor and drive controller, a rotary field test is also no longer necessary. This means that the system behaviour is independent of the supply frequency. The DVA-Kit operates in the same way everywhere: consistent hydraulic performance worldwide.

HYDAC hydraulic modules for variable-speed drivesWhy you should opt for a DVA-Kit with coordinated hydraulic blocks

HYDAC variable-speed drive solutions can be combined with various hydraulic modules for preconfigured basic functions, including sensors and pressure limiting.

That's why it pays to rely on hydraulic modules for variable-speed pumps from HYDAC:
 

DVA-Kit without hydraulic block for variable-speed pumps

If you use a DVA-Kit without a matching hydraulic block, you will need to take care of further integrations. This means that the following tasks will still need to be completed and taken into account:

  • Connecting the supply voltage
  • Connecting the sensor cables
  • Synchronising the sensors with the drive controller

The following questions need to be answered:

  • Where does the pressure sensor need to be connected?
  • Who will synchronise the connected pressure sensor with regard to signal type, signal level and input terminal in the drive controller?
  • Who will set the process controller?
     

DVA-Kit with hydraulic block for variable-speed pumps

If you select a preconfigured basic supply block for the DVA-Kit, integration is even easier for you. Because everything is coordinated and synchronised. What this means:

  • The right pressure sensor is integrated into the hydraulic block and appropriately coded in the drive controller.
  • The electrical connection of the sensor cable is simple and safe thanks to pre-assembled connectors.
  • You'll also receive step-by-step instructions for commissioning.

All you have to do is answer the following questions:

  • Where does the target value come from?
  • Who will connect the supply line?
     

Configure a HYDAC DVA-Kit now

With our DVA-Kit, you can configure your variable-speed motor pump units – individually tailored to suit your needs.

Configure a DVA-Kit now

FAQ

What is a variable-speed drive?

KineSys variable-speed drives (DVA) are the perfect example of symbiosis between hydraulics and electronics. Thanks to the integrated closed-loop control, the drive motor can be switched on and controlled according to requirements. This results in major potential for energy savings, as only the amount of energy that is actually needed is made available. This means that energy savings of up to 70 % can be achieved, depending on the machine cycle. The condition-optimised adjustment of the KineSys solution reduces the power dissipation to a minimum. It also drastically reduces the complexity on the hydraulic side.

What is meant by closed-loop control?

Closed-loop control circuits

  • A control circuit is the self-contained sequence of actions for influencing a physical variable in a technical system or other type of system.

Speed control

  • If the general control circuit's system is transferred to the control types used in hydraulics, the following block diagram for speed control is obtained.
  • The difference between the target value and actual speed is transferred to the frequency inverter. This then controls the motor so that the control difference (in our example, the speed deviation) is as close to zero as possible.

Pressure control

  • This analogy can also be applied to pressure control. The target and actual pressure difference determines the control of the motor. The actual physical pressure variable is determined by a sensor within the fluid and in turn serves as a reference variable for the controller.

Accumulator charging mode

  • The accumulator charging mode is a special pressure control application. The underlying controller structure is identical to the figure above.
  • If the desired target pressure is reached and there is no decrease in hydraulic power, the drive runs at minimum speed to ensure continuous lubrication of the hydraulic pump. After an adjustable period of time (ΔTimeHysteresis), the drive is switched off completely. If the actual measured pressure value falls below the difference between the target pressure value and ΔPressure hysteresis, the drive switches back on and automatically switches to pressure control. The greatest possible energy savings can be achieved with this operating mode.

What is a (standard) parameterisation?

Parameterisation

Parameterisation means providing a program with variables that control the process.
This also applies to the parameterisation function of our drive controllers. The various parameters are used to define functional variables such as:

  • Minimum and maximum speeds
  • Control types
  • Processing digital and analogue input and output signals
  • Bus system interfaces
    etc.

Standard parameterisations

With our many years of experience with a wide variety of applications, we have defined standards that fully cover most use cases. Adaptations to your system are of course taken into account for every product that we deliver. 

What are the most important parameters for speed control?

Speed control

Below you will find the most important parameters that are present when a drive controller with speed control is supplied to a customer.

  • Customer speed target value on analogue input 2
  • Analogue input 1 for pressure sensor (no effect on speed control)
  • Drive enabling via digital input 1
  • Acknowledgement of pending errors via digital input 4
Parameter numberDescriptionValueUnit
1,020Minimum frequency25Hz
1,021Maximum frequency100Hz
1,050Braking time 10.1s
1,051Run-up time 10.1s
1,100Operating modeFrequency setting mode-
1,130Target value sourceAnalogue input 2 (0-10 V)-
1,131Software releaseDigital input 1 (24 V)-
1,150Direction of rotationOnly left-
1,180Acknowledgement functionDigital input 4 (24 V)-

What are the most important parameters for pressure control?

Pressure control

Below you will find the most important parameters that are present when a drive controller with pressure control is supplied to a customer.

  • PID process controller for pressure control
  • Specification of the P and I components of the controller
  • Target value specification by the customer via analogue input 2
  • Drive enabling via digital input 1
  • Acknowledgement of pending errors via digital input 4
Parameter numberDescriptionValueUnit
1,020Minimum frequency25Hz
1,021Maximum frequency100Hz
1,050Braking time 10.1s
1,051Run-up time 10.1s
1,100Operating modePID process controller-
1,130Target value sourceAnalogue input 2 (0-10 V)-
1,131Software releaseDigital input 1 (24 V)-
1,150Direction of rotationOnly left-
1,180Acknowledgement functionDigital input 4 (24 V)-
3,050PID-P amplification11
3,051PID-I amplification11/s

What are the most important parameters for the accumulator charging mode?

Accumulator charging mode

Below you will find the most important parameters that are present when a drive controller with the accumulator charging mode is supplied to a customer.

  • PID process controller for pressure control
  • Specification of the P and I components of the controller
  • Target value specification by the customer via analogue input 2
  • Drive enabling via digital input 1
  • Acknowledgement of pending errors via digital input 4
Parameter numberDescriptionValueUnit
1,020Minimum frequency25Hz
1,021Maximum frequency100Hz
1,050Braking time 10.1s
1,051Run-up time 10.1s
1,100Operating modePID process controller-
1,130Target value sourceAnalogue input 2 (0-10 V)-
1,131Software releaseDigital input 1 (24 V)-
1,150Direction of rotationOnly left-
1,180Acknowledgement functionDigital input 4 (24 V)-
3,050PID-P amplification11
3,051PID-I amplification11/s

Accumulator charging mode

  • Pressure value as actual value of the PID controller on analogue input 1 (already wired at the factory)
  • Standby time = switch-off time after reaching the target pressure + minimum speed
  • Standby hysteresis = switch-on and switch-off thresholds in relation to the target pressure
Parameter numberDescriptionValue
3,060PID actual valueAnalogue input 1 (0-10 V)
3,070PID standby time0.01 s
3,071PID standby hysteresis10 %

What process data is provided in the optional fieldbus system?

Optional fieldbus system

If the drive controller is ordered from KineSys with the "Fieldbus" option, the following process data is provided for reading and writing as standard. Further information can be found in the documentation for the particular bus system.
 

Parameter numberDescriptionValueUnit
Not parameterisableProcess data Out 1Status word-
Not parameterisableProcess data Out 2Actual frequencyHz
6,080Process data Out 3Motor voltageV
6,081Process data Out 4Motor currentA
6,082Process data Out 5Supply voltageV
6,083Process data Out 6Frequency target valueHz
6,084Process data Out 7Digital inputs bit-coded-
6,085Process data Out 8Analogue input 1V
6,086Process data Out 9Error word 1-
6,087Process data Out 10Error word 2-
Not parameterisableProcess data In 1Control word-
Not parameterisableProcess data In 2Target value%
6,110Process data In 3Digital outputs - relay-
6,111Process data In 4Analogue output 1V
6,112Process data In 5Customer spec. PLC input variable 1-
6,113Process data In 6Customer spec. PLC input variable 2-

What do circuit diagrams for motor-mounted frequency inverters look like?

Circuit diagram

The two circuit diagrams for motor-mounted frequency inverters from KineSys with and without the STO function (Safe-Torque-Off) are shown below. Controlling a valve via digital output and an optocoupler is an option and is not included in the standard scope of delivery.

Circuit diagram with STO function – download now

Circuit diagram without STO function – download now
 

Downloads

Find your optimum solution

Contact us now