Uniqunet und uniquom high quality and modern control-devices from vbk technology for EC-fans. With only one single device - to start-up and control EC-Drives from different brands. Suitable for EC-fans and EC-motors from different suppliers as ebmpapst, Ziehl Abegg, NicotraGebhardt ( former Gebhardt Ventilatoren ), Rosenberg.
skilled Measurement- and Control Technician, 20 years experience in Automation, 2005 Accredited Technician, Designer of FFU-Control-Devices at NICOTRA||Gebhardt
2012 Founder of vbk technology GmbH
skilled Electrician, Study Electrical Engineering main area Electrical Drives, Doctorate 2008, until 2011 R&D Leader of Electrical Drives NICOTRA||Gebhardt
2012 Founder of vbk technology GmbH, Lecturer at the BSW (College of Engineering in Plauen and Chemnitz) and at the Sächsische Kältefachschule in Reichenbach
Fans with EC-drives, no matter if from ebmpapst, Ziehl Abegg, Nicotra||Gebhardt or Rosenberg, show highest efficiencies especially in partial load range.
Especially in the HVAC applications this is immensely important, where the electronic drives being used very often in partial load operation exclusively.
Total energy savings up to 50% are not rarely compared to concepts with classical drives.
An EC-drives consists of an EC-Motors where permanent magnets create the required radial magnetic field inside the motor and an EC-controller a sort of frequency inverter that creates the current for the motor in a proper manner.
Especially EC-fans in the HVAC business are integrated that means that motor and controller belong to only one single unit.
The drive control of the EC-motor is done by the EC-controller automatically. The user just needs to ensure a set-point is supplied according his requirements.
Infographic - Advantages EC-fans / EC-motors
EC-motors are according to its name electric commutated motors. The control of the stator winding system is done in accordance to the exact position of the permanent-magnet rotor. The position of the rotor is mainly measured by little hall sensors placed in the EC-motor in rotational sense or is calculated using a special mathematical model. In both variations an electronic drive control of the EC-Motor called EC-controllers is indispensable.
Video - EC motor.
Stator eines EC-Motors einer FFU - Nicotra||Gebhardt
Rotor eines EC-Motors (ebmpapst) in einer FFU-Anlage
EC fans are applied in a wide range of HVAC units, especially in speed controlled systems, where high efficiency and noise reduction matters.
It can be for the control of FFUs or FANWALLs, it can be for Condensers and Evaporators or as classical Exhaust- and Supply Air fans.
In every electrical motor a radial magnetic field is required to interact with the motor current to generate a torque. In EC-motors permanent magnets are used for that purpose. Thus there is no additional current required what is effective, mainly in partial load range and leads to highest efficiencies in the whole operation range.
Fans with backward curved blades are normally higher efficient than those with forward curved blades. They are available either already mounted inside a special housing or delivered without to be plugged by costumer directly in his plant. This is where the name plug fan comes from.
EC-fans are designed for the use of a modern EC-Drive. Those are not only higher efficient than classical induction drives but due to it's electronic driver better in a wider range of voltage and frequency. Thus these products can be used normally worldwide without any modifications.
EC-Motors require a matching drive controller compellingly that generates the supply voltage for the EC-Motor. Together they built the EC-drive. Start-Stopp sequences of the drive will be made very gentle what causes higher lifespan for the EC-motor. To the customer the application is very easy, either it is been speed controlled by an analogue 0-10V signal or nowadays by RS485 interface. The latter one can be very easy controlled by suitable control devices i.e. from our house .
The function of an EC-motor is quite simple as the switching from (winding) phase to phase is not made by a mechanical commutator but by the drive controller, that’s why it is called Electronic Commutated. The exact rotor position is normally been detected by tiny little hall sensors placed inside the motor.
Air Filtering Equipment with Fan, taking Air from the ceiling pressing it through the filter into the cleanroom, either as laminar or turbulent flow. Control of the FFU either by a FFU-Control Center or directly in closed loop manner for a required volume, pressure, speed or any other control value.
For our customers we design different diagnostic and control devices for EC-drive market. This includes drive controllers incl. COM-interfaces (analogue, Modbus rtu as well as other, even proprietary, RS485 systems).
Furthermore we plan whole concepts for electric drives (asynchronous and synchronous) especially for fans as well as special applications.
We help our customer at the design, the data management and the project programming of FFU appliances. Furthermore we would like to support you while the commissioning of new cleanroom appliances or extensions and perform on demand an error diagnostic with our own designed tools (i.e. uniquom / uniqunet ) including a final troubleshooting.
One of the biggest energy suppliers in the western part of Switzerland is now using technologies out of the Vogtland to parametrize and control his EC-fans from ebmpapst.
The chosen parameter set for the service handheld does not only allow to control EC-Drives with Modbus- und ebmBUS-interface but to clone whole parameter sets within seconds from ec-fans of the same physical size.
Smoke Extract Fans, whether as Radial- or Axial fan, should keep emergency exits and paths free of smoke. Even if there is no normal air ventilation required, a save start and operation is demanded in case of fire to achieve the nominated run time for such a fan. A proper function of the motor bearings is there for indispensable.
The bearing monitor unit that was especially developed for a fan manufacturer evaluates different frequencies out of the swinging acceleration that needs to be measured. The evaluation is more or less independent from the type of fan, motor and bearing and it even detects pre-damages of the ball bearings from the induction motors.
However a little more complex is the monitoring of the bearing conditions at EC-fans, because the measured frequencies overlap with the switching frequencies of the EC-Controllers.
The evaluation is quite easy as a simple traffic light control (green-yellow-red) at the device. A special software can be applied for detailed damage analysis.
A big research institution for Micro- and Nano-technologies in Nordrhein Westfalen enlarges their cleanroom capacity this summer. The additional cleanroom surface is covered by FFU's from NICOTRA||Gebhardt that are controlled and monitored by an existing FFU-control centre since last Tuesday.
The commissioning runs without any problem, besides to the correct addressing only some max-speeds needs to be set by hand, what is really no issue with our control devices for EC-fans.
Yesterday a production shutdown was planned in a job-side in northern Germany, used by different companies to perform their annual maintenance. So the FFU System, delivered with EC-fans from Nicotra||Gebhardt and commissioned by vbk technology in 2013 was checked was well.
„Troubleshooting - Commissioning - Training“ were written at the P.O. of a big plant engineering company. They pleased us for support for commissioning a FFU-network with fans from ebmpapst with Modbus Interface at site and to train the operating staff afterwards.
After an address-conflict was eliminated in the FFU-network and no other abnormalities were found we did the programming of the uniqunet FFU-control device together with the end user. Now 3 FFU groups will be controlled according to the manufacturing process with different set-values in day/night mode.
Service uniqunet – FFUs in Cleanroomapplication
After a few years of absence the Cleanroom Lounges took place in Karlsruhe this year again. Personal highlight for me was the operation of a of an uniqunet control device driving an EC-fan of a NICOTRA Gebhardt ( former Gebhardt Ventilatoren ) FFU.
uniqunet control device supports NICOTRA Gebhardt FFU
A well-known research institute in Munich had scheduled a filter change of their FFU's for the last week. Here, the opportunity was taken to check some communication abnormalities in the control of the FFU's by a FFU-Control-Centre type FanCopmmander200). The installation was commissioned with components from NICOTRA Gebhardt in 2005.
All involved have been delighted as it has been find out that neither the EC-FFUs nor the FanCommander200 has caused the problem but just a simple hidden cable damage in the main backbone. After renewing it, the installation is running perfectly again and that after this long run time.
A modern hand device to control and to parametrize several devices with RS485 interfaces.uniquom® - get more information Downloads and information uniquom