Product category:
Industrial Drives/Controls
News Release from: Danfoss Motion Controls | Subject: FC302 Automation Drive
Edited by the Engineeringtalk Editorial
Team on 07 March 2006
Drive keeps them dancing in Copenhagen
Drive powers cooling unit in hotel party room and this keeps power consumption and noise down, and, due to the drive's smart logic controller, there is no need for an external PLC control unit.
Every weekend in the centre of Copenhagen, celebrations take place in the basement of the Hotel Savoy Weddings, dinners, live music and dancing are common, but local noise restrictions means there can be no open windows to disturb residents in and around the hotel
This article was originally published on Engineeringtalk on 7 Mar 2006 at 8.00am (UK)
Related stories
Drive keeps peas flowing
Drive controlled by safety relay eliminates the need for individual output contactors, saving cost and panel space on high speed pea canning line.
New name comes to the fore in UK drives market
Following the acquisition of Bauer by Danfoss, the new Danfoss Motion Controls organisation will offer the market a co-ordinated range of drives and geared motor units
So temperature control of the function rooms is essential but normally only at busy weekends.
The hotel installed a Danfoss VLT FC302 Automation Drive to power a cooling unit from Airedale, and this does the trick with low power consumption, low noise and low commissioning, and, due to the drive's integral smart logic controller, the need for an external PLC control unit has been eliminated.
Cooling is initiated by pushing a start button in the function room.
Further reading
Connection technology cuts motor setup time
From April 2002, all Danfoss Bauer geared motor units up to 2.2kW will be supplied fitted with innovative Cage Clamp connection technology which reduces connection time and costs by up to 75%.
Aseptic motors keep it clean
A new motor design from Danfoss Motion Controls will aid cleanliness in the food and beverage industries.
A pressure sensor transmits the compressor's suction pressure to the FC302 drive, and the smart logic controller moderates the compressor speed and thus maintains the suction pressure constant at a level corresponding to the required temperature of the outlet air.
Any rise in the outlet air temperature is reflected on the suction pressure and this is registered by the PID process controller, which speeds up the compressor drive and thus brings the inlet air temperature back down.
If the load disappears, as when the outlet temperature has reached the lower limit, the logic controller will shift the drive into energy saving standby mode, ready for the temperature to rise again.
Installation was simplified by having only the start-stop wiring and the cooling pipes connecting the HVAC unit with the ventilation units inside the building.
Nevertheless, the system responds rapidly to changing needs for cooling while providing energy savings and optimal compressor operation.
Without the need for any external PLC, the compressor is kept running within the allowable speed range, ensuring precise air temperature control with low power consumption.
"We have installed a similar system for another company, where comfort temperature controlled by the smart logic controller is maintained in two separate office rooms without PLCs and with no wiring between the rooms and the HVAC unit", said Miquel Lopes of Glenco in Copenhagen, the firm that installed the Airedale units.
"The VLT drive simply maintains the suction pressure, and thus the outlet temperature, at the desired level".
"When the load changes, the drive reacts and regulates the temperature".
"It runs perfectly".
This Copenhagen application illustrates how intelligence integral within the drives takes over PLC functions.
The VLT way of simple PLC programming is done by the smart logic controller - an easy and all round way to enable the drive to react to literally any sort of event, including the status of the drive and motor itself.
• Danfoss Motion Controls: contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
