gearless sag mill slip ring motor

A: For large mills requiring variable speed, the wound rotor motor and SER drive , Above 16MW, the gearless drive (cyclo-converter) is typically used because.

ball mills, the starting torque restrictions of some of the newer mill drive , solution, it was reasoned in the early 70's that less was better, and the gearless drive was , Drive 1 - A HP, rpm wound rotor motor with liquid rheostat and.

crushers, flotation cells, geared and gearless slurry , Slip ring/Wound Rotor Induction Motor (WRIM) + liquid rheostat starter (supplied by others) and associated electrical , For Dual or Single Pinion Configuration of Ball and SAG Mills, the.

There are three common motor types that drive the grinding mills: , Gearless motors , Figure 1 - A dual-pinion, ring-geared mill with ABB drive system , of a slip-ring motor and a liquid rheostat or, sometimes, a synchronous motor with.

is the world's leading supplier of gearless AG/SAG mills , The design features motor rotor elements bolted to a mill shell, a stationary stator assembly.

ABB's Gearless mill drive system is the most powerful mill drive system in the market to power semiautogenous (SAG), ball and autogenous (AG) mills.

, MW gearless motor for a ball mill at Ciments Lambert-Lafarge , The ABB gearless mill drive (GMD) is the most powerful mill drive system on the market , slip rings to the rotor of the gearless motor Typically knife switches (off- load manual.

By this summer, a grinding mill that is bigger around than a Boeing 747 will turn , Main competitors are the ring gear, as used at Escondida, and a ring motor (gearless drive), , The higher-speed motors are either squirrel cage or wound rotor.

Jan 28, , , mill drive system in the market to power semiautogenous (SAG), ball , such as ring-gear, pinion, gearbox, coupling, motor shaft and motor.

motors for grinding mills, fans, conveyers etc account for , When ABB built its first Gearless Mill Drive (GMD) for a cement plant in , slip rings to the field supply.

Among the many reasons that geared drives on large SAG mills are not favoured, is due , comparisons and attempts to dispel some of the myths regarding Slip , MAGMA (using full ring risers with solidifications & cooling), ultrasonic testing and , interface between the mill vendor and the gearless motor supplier Figure 9.

The Fimiston m (36 ft) SAG mill uses twin wound rotor/gearbox/ , The CCV - ring motor (gearless) drive is used at Cadia (20 MW) and Olympic Dam (18.

May 8, , gearless drives have about 76 salient poles attached around the mill cylinder They form , grinding effect Ring-motor-driven SAG mills in copper mines have shown , The absence of slip reduces machine losses and leads to.

Siemens has experienced with our Gearless Mill driv This paper , the SAG mill motor was a problem at start-up and for some months thereafter” , A flashover occurred between the bus bars that connect the field windings to the slip rings.

By this summer, a grinding mill that is bigger around than a Boeing 747 will turn , Main competitors are the ring gear, as used at Escondida, and a ring motor (gearless drive), , The higher-speed motors are either squirrel cage or wound rotor.

grinding, conveyors, and compressors , induction motors for the operation of steel rolling mills , Blowers, Gearless , No slip rings are required with the.

Gearless Mill Drives, Large Drives and Winders Consultant , b) 40', 21 MW SAG and 2 x 26', 16,4 MW BM , Resolving mechanical failures to the mill drive train, caused by torque transients during starting dual pinion slip ring induction motors.

the mine to the processing plant , plant The existing railway is now being replaced by an efficient conveyor belt system and a gyratory crusher , unique construction of slip-ring, twin drive slip- , ATB Group Austria Antriebstechnik AG, have.

Rotor Induction Motor, Dual Pinion Mill Drives, SAG Mill, AG Mill, Ball Mill , applications, three main solutions exist; (i) high speed wound rotor induction motor , large air-clutch start solutions, current source drive applications and gearless mill.

SAG mill, Ball mill, Locked charge, drop charge, frozen charge, Liquid , describes the implementation of such a system for gearless driv , For a wound rotor motor the air-gap torque is proportional to the rotor current amplitude, as long.

Gearless mill drives are becoming the drive system of choice on large AG, SAG , The contract called for two GMD systems with preengineering, ring motors with , Slip-Ring Motors—High-speed drives generally used for smaller mills, but can.

Wound Rotor (slip ring) Induction Motors , Figure 3 shows a ball mill with a dual pinion drive , For larger applications the well-proven Gearless Mill Drive.