Hypersynchronous SER Drive
The Slip Energy Recovery (SER) Drive is a well proven technology that are used especially for large power motoring systems. SER Drives are highly efficient in its class, superb reliability, compact and highly capable of controlling very precise motor speed while recovering slip energy in the Wound Rotor Induction Motors (WRIM).
The Hypersynchronous SER Drive recovers excess energy that is supplied from the stator terminals (slip energy) and feeds this energy back into the grid. With the recovery of slip energy, the user will achieve very high efficiency ratios, thus reducing electricity consumption and reducing carbon emissions.
Main advantages of Slip Energy Recovery (SER) Drives compared to classic Variable Speed Systems (VSS) are:
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Redundancy - SER Drives may have a LRS/RCD as a backup drive in case of any potential failure in the starting drive. This will prevent any equipment downtime that will result in loss of production in critical applications.
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Reliability and Robustness - SER Drives are designed with a large safety factor to allow for one of the highest MTBF in drive technology. They are also simple to maintain and are air-cooled.
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Top-class Energy Efficiency - The recovery of slip energy through the SER Drive to the grid has proved to be one of the highest efficiency drive compared to other technology.
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Hypersynchronous Speed - SER Drives allow the user to increase production without the need to replace the motor. This is due to the capability of the SER Drive to run motors above the rated speed without any torque losses, compared to other drive technology that is required to reduce torque to maintain the Torque/Frequency Ratio.
Background of our Technology Partner
Our SER drives are manufactured by ElectroDrives, who is one of our trusted technology partners.
Electrodrives is based in Madrid-Getafe, Spain and is a global market leader in Slip Energy Recovery (SER) Drives for Slip Ring Motors that are mainly used in the mining industry especially for SAG Mills. Following the acquisition of International Electronics S.A. (IES) in 2018, ED is focused to further innovate and continue developing customer-focused solutions for the mining industry.
Technical Specifications : Hypersynchronous SER Drive
Configurations:
Typical Applications:
Motor Rated Power:
Typical Speed Ranges
(% of Synchronous Speed)
Typical Grid Voltages:
Motor Rotor Voltage:
Input Power Factor:
Efficiency:
Starting Method:
Redundancy:
Operating Temperature:
Cooling Method:
Switching Semiconductor:
Plant Communications:
Single Drive
Dual-pinion Drive (Master-slave with load sharing)
Constant Load (SAG Mills, Ball Mills, Vertical Mills)
1,000 kW up to 10,000 kW (per motor)
85% - 110% (Default for new grinding mills)
80% - 120% (Extended Range)
70% - 100% (In case the gearbox is not optimized)
3.3kV, 4.16kV, 6.0kV, 6.6kV, 11kV, 13.8kV
Up to 4,200V
0.99 with power factor control
>99.1% ( For motors of 5,000kW and above)
External LRS or RCS
Bump-less bidirectional transfer to LRS/RCS
+0 .. +50 deg C
Air-cooled (No water or other fluids)
IGCTs rated 4,500V
Ethernet/IP, Modbus-TCP, Profibus, Profinet, Ethercat, Devicenet