Switched Reluctance Drives

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SR Drives Manufacturing Ltd has successfully utilised SR Drive^® switched reluctance technology in its range of DIAMOND^® drive systems for the underground coal industry. DIAMOND^® drives installed within the mining industry range from 35kW to 300kW and are employed as drives on belt conveyors, armoured face conveyors, traction systems and pumps.

A DIAMOND^® drive, for underground operation, is a flameproof system which comprises a switched reluctance motor and a medium voltage controller. Both units are water cooled and

Infinitely variable speed solutions for the most hostile of environments.

Flameproof drive systems for potentially explosive atmospheres.

have been custom engineered to fully interface with the stringent requirements for electrical equipment working in potentially explosive atmospheres. The system has Group I hazardous area approval and is of rugged construction to withstand the arduous conditions of underground coal mining.

Today, DIAMOND^® drives are successfully used on key materials-handling applications throughout the industry. One such application is underground at UK Coal’s Maltby Colliery. Here, three 150kW DIAMOND^® drive systems are installed on a 2300 metre long belt conveyor. They provide the conveyor with three operating speeds for materials movement, man-riding and maintenance; each with torque limit control. The conveyor has totally variable acceleration rates that give extremely smooth ramp-up without surge, thereby reducing belt stretch and wear.

In parallel with their success and experience in the demanding mining industry, SR Drives Manufacturing has developed a range of industrial motors and controllers for use in general industrial applications – see the Products section for more details.