Sensorless drive is energy-efficient
Fourth Quarter 2008
Electrical switching & drive systems & components
The new KEB ASCL (asynchronous sensorless closed loop) variable speed drive offers real vector control without feedback as a solution for speed control of pumps, fans and compressors.
Major benefits include:
* High energy savings.
* Excellent speed and torque accuracy.
* Dynamic regulation of load jumps.
* Automatic calculation of the motor by the inverter – auto tune function.
* No encoder, encoder interface or encoder cabling required for feedback.
* Drive calculates the optimum momentary values of motor voltage and current under present load conditions.
The KEB ASCL achieves energy savings by delivering the exact voltage to the motor dependent on the load condition, exact adaptation to the quadratic speed torque characteristic of the pump/fan and automatic reduction of the output voltage in a part load condition. In addition there is no over-magnetisation of the motor, and therefore no additional no-load losses.
Accurate speed and torque control guarantees slip-free speed control for exact flow and delivery quantity. The torque can be limited to protect drive and motor.
Dynamic control of load jumps ensures speed stability thus reducing wear and eliminating current peaks during acceleration and load change.
The speed dependent timer function can be used in compressor applications to organise maintenance intervals dependent on the speed of operation and drain valves can be opened after a dedicated number of revolutions.
In applications like pump dosing, positioning can be achieved without a sensor.
For more information contact Mike Vernes, Pneumatic Electric Control Systems (PECS), +27 (0)31 303 3701, [email protected], www.pecspower.co.za
Further reading:
Specialised heavy lifting and transport solutions for Singapore’s offshore island
Electrical switching & drive systems & components
A groundbreaking land reclamation project on an offshore island in Singapore has paved the way for the country’s first polder, reclaiming about 800 hectares of land.
Read more...
PC-based control for additive machine tools
Beckhoff Automation
Editor's Choice Electrical switching & drive systems & components
IRPD is a specialist in additive machine tools. Development is heavily focused on high system throughput and consistently high process quality. This goal was achieved with the help of PC- and EtherCAT-based control and drive technology from Beckhoff.
Read more...
Major software release for Parker PSD servo drives
Parker Hannifin - Sales Company South Africa
Electrical switching & drive systems & components
Parker Hannifin has released its PSD servo drive family delivering new control modes, advanced synchronisation functions and performance optimisations designed to improve throughput, accuracy and system efficiency in demanding industrial applications.
Read more...
Beckhoff expands economy drive system
Beckhoff Automation
Electrical switching & drive systems & components
Beckhoff’s new AM1000 servomotor joins the company’s economy drive system. The compact, powerful motor and the AX1000 servo drive provide users with a perfectly coordinated, cost-optimised drive system.
Read more...
Moving next-generation monopiles
Electrical switching & drive systems & components
Wind turbine sizes are increasing at an unprecedented rate. The bigger the turbine, the more power it can generate and the fewer are needed per wind farm. Mammoet has been ahead of the curve in coming up with ways to make the movement of even XXL monopiles faster and more cost-effectively.
Read more...
PC-based control for flat wire motors for electric vehicles
Beckhoff Automation
Electrical switching & drive systems & components
Special machine manufacturer, ruhlamat Huarui Automation Technologies has unveiled the second generation of its mass production line for flexible stators with bar winding (pins). This enables an extremely short production cycle and line changeover times, supported by PC- and EtherCAT-based control technology from Beckhoff.
Read more...
New generation surface drill rig
Electrical switching & drive systems & components
Epiroc South Africa is launching a new and improved PowerROC T45. This new generation surface drill rig offers increased fuel efficiency and high availability, and is a welcome addition to the PowerROC family.
Read more...
Coke drum integrity project at Canadian oil sands site
Electrical switching & drive systems & components
Mammoet supported a leading Canadian energy provider in Alberta’s oil sands with replacing its original eight coke drums.
Read more...
Rip-and-ship solution speeds up nuclear decommissioning project
Electrical switching & drive systems & components
When removing steam generators from decommissioned nuclear reactor buildings, the most economical method is to remove them in one piece. Mammoet was commissioned by Framatome to support with the removal of four steam generators from PreussenElektra’s Nuclear Power Plant Unterweser in Germany.
Read more...
Helping to solve wastewater challenges
Electrical switching & drive systems & components
KSB Pumps and Valves is doubling its efforts to help government and municipalities find practical and technical solutions to the growing wastewater challenges gripping large parts of the country.
Read more...
printer friendly version