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MOTORS & DRIVES 52 E&MJ; • APRIL 2016 www.e-mj.com with in-house technology to develop a complete electrical drive package. As a result, the company can offer everything from a single frequency converter to a complete drive-train package with rectifi - er transformer, frequency converters and motors, plus appropriate accessories. For mineral processing, Ingeteam has developed applications for both new in- stallations and the refurbishment and expansion of existing systems, for appli- cations such as SAG and ball mills, and belt conveyors, as well as mine hoists. Ingedrive SC is a containerized elec- trical room, housed in a standard 40-ft shipping container, that offers prefabri- cated, modular power control-room hous- ing, with complete power distribution and control cabinets, as well as auxiliary sys- tems such as HVAC, dust fi lter pressuriza- tion, fi re protection and access control. At this year's Society for Mining, Met- allurgy and Exploration (SME) Annual Conference and Expo, held in Phoenix in February, Ingeteam's presentation, New generation variable speed drives: opti- mizing the grinding process in commi- nution circuits, highlighted the technical details of mining projects the company has undertaken worldwide. It also de- scribed drive solutions for ball mills and high-pressure grinding rolls, highlighting the advantages of speed variation for each application and explaining how to achieve a longer service life, as well as providing plant-specifi c details. As an example, Ingeteam offers medi- um-voltage Ingedrive MV frequency con- verters, either as DFE-type diode rectifi - ers or as AFE-type regenerative rectifi ers for mills and high-pressure grinding rolls from 800 kW to 18,000 kW. Benefi ts include the small footprint, a low parts count and excellent reliability, the com- pany stated. Power From TMEIC Established in 2003 through the merg- er of the industrial systems departments of Toshiba Corp. and Mitsubishi Electric Corp., TMEIC produces variable frequen- cy drives, motors and advanced automa- tion systems. Its mining industry applica- tions include motors and drives for mine hoists and fans, pumps, grinding and SAG mills, conveyors, and draglines and mining shovels. The company's product range in- cludes large, rugged three-phase medi- um-voltage electric motors, both synchro- nous and induction up to 100,000 hp (74.6 MW), with multiple poles for rang- es of speed, and designed for variable speed operation. It also offers high-power variable-frequency drives for soft-starting motors and for varying motor speeds, with power levels up to 80 MW (107,300 hp), operating on low- and medium-voltage power at voltages from 440 V up to 11 kV. Its special drives are used for controlling the speed of wound rotor motors, and for recovering slip power, while it supplies special controls for operating large drives, and services for the design of complete custom systems. In February, TMEIC launched its TM21-G family of induction motors, for which typical applications include driv- ing pumps, compressors, fans, conveyors and mine hoists. The motors' main fea- tures include good reliability, high effi - ciency, superior quality leading to long service life, and low maintenance, the company claims. Standard features include frame sizes from 315 to 900 mm, with maximum out- put power of 30,800 hp (23 MW). Rated voltages range up to 11 kV. The maxi- mum speed, operating from a variable frequency drive, is 3,600 rpm. Avail- able enclosures and cooling systems include totally enclosed fan cooling, weather-protected Type II cooling, totally enclosed air-to-air cooling and totally enclosed water-to-air cooling, with the motors available with either antifriction or sleeve bearings. The company lists the benefi ts of using variable-frequency drives in min- ing applications as including increased reliability over mechanical alternatives, signifi cantly less maintenance and, for excavators, good speed and position con- trol. They also offer better soft-starting characteristics for conveyor and mill mo- tors, eliminating stress caused by starting inrush currents and providing extended motor life. Industry-tough Hardware From WEG With its headquarters in Brazil and oper- ations worldwide, WEG offers a range of motor and drive products for mining ap- plications. These include its W22 stan- dard and crusher-duty motors, MV drives and EM synchronous motors. The company stated that its goal for the W22 motor is high performance with maximum energy effi ciency, while provid- ing low lifetime ownership costs. Typical applications include powering pumps, fans, crushers, mills, presses, elevators and packaging equipment. WEG Crusher Duty W22 motors are specifi cally designed to meet require- ments for rock crushing applications. A 10-MW, twin-motor SAG mill equipped with a TMEIC slip power recovery drive system.