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2020-04-27T03:04:07+00:00
  • Gearless mill drives - ABB

    • 28 MW GMD for 42' SAG mill Whether it is size or an installation at the highest altitude (4600 m.a.s.l.), ABB’s GMDs are well ... directly at the motor for both

  • SAG Mill Components - Mineral Processing Metallurgy

    Apr 18, 2018  SAG Mill Components. ... If the trunnion bearings are not reliable the complete mill is not reliable. Various trunnion bearings designs are used, ranging from

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  • Modeling and Evaluation of Cycloconverter-Fed Two-Stator ...

    Dec 10, 2014  Abstract: Typical drive configurations of high-capacity SAG mills use a two-stator-winding vector-controlled synchronous motor, with a 30° shift between the two

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  • 1 x SAG Mill Siemens Motor

    1 x SAG Mill Siemens Motor For Sale/Re-Assignment Mill Details Type of Mill SAG Mill Mill Dimensions 11,582 mm x 7,759 mm (38’ x 26’) (D x

  • Online Monitoring System for Gearless and Low Speed Gear ...

    ProjectHow It WorksTailored SolutionChallengesOutcomeThe Specs at A GlanceThe client required an online monitoring system for its SAG mill. The stator windings in the SAG mill motor have a history of becoming loose. If untreated, loose stator windings will lead to electrical faults with the motor and if complete dislodgement occurs, damage to the stator and rotor. Any downtime in the equipment for repairs is a loss in the ability to produce product, costing the mine.
  • Uneven SAG Mill Drive Power Draw - Grinding ...

    Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. ... There are two GE motors for SAG mill but unfortunately sometimes

  • The Siemens 42ft gearless mill drive, still an ...

    The ring motor is not self-supported and requires the mill to mount the rotor poles and needs the mill foundation to support the stator. In addition

  • (PDF) Evaluation of synchronous motors on grinding mills

    Ball mills and SAG mills, ... To replace the sensor the information on the rotor speed is extracted from measured stator voltages and currents at the motor

  • MOTOR TECHNOLOGY Saving energy - TMEIC

    Mill drive example An example of slip power recovery is the wound rotor motor shown below, one of two for powering a new 10,000 kW SAG mill in Australia as shown

  • Literature Review: Gearless Motor Failures – A Mill ...

    Sep 10, 2014  The Collahuasi motor was for a 40 ft SAG mill. The Antamina 38 ft SAG mill was also driven by an ABB motor and the hanger plates had not failed on that

  • Design and dynamic behavior of large Ring Motors for ...

    Figure 1: Ring Motor of the 38’ SAG-Mill of Rio Paracatú Mineraçao; Brazil 3 Design Verification To assure reliability of operation the mechanical design must be verified. The magnetic field and the motor torque deform the stator of the motor. The stator ovalization leads to additional air gap deformation, which must be kept between limit ...

  • Codelco Andina changes the main motors of its ball mills ...

    Feb 24, 2020  Due to the great technical knowledge and safety protocols of Outotec in this type of work, Codelco Andina invited the company to participate in the change-out of two of its 7500 and 8500 HP SAG grinding ball mill motors in the interior of its underground operation.

  • Autogenous mills, semi-autogenous mills and ball mills for ...

    the-art simulation tools allows Polysius to design and build complete ... of motor stator and motor poles, which are attached to the mill shell. Drive motors In the case of ring gear drives, either wound rotor induction motors or synchronous motors ... motor on a SAG mill.

  • 1 x SAG Mill Siemens Motor

    1 x SAG Mill Siemens Motor For Sale/Re-Assignment Mill Details Type of Mill SAG Mill Mill Dimensions 11,582 mm x 7,759 mm (38’ x 26’) (D x L) Default Mill Speed 7.5-8.0 RPM Mill Speed 7.56-10.08 RPM Liners Excluded Mill Drive Motor Type Wrap Around (included) Mill Drive Motor Size 19,400 KW (26,016 hp) Variable Speed Drive Yes Max.

  • Failure Prediction of Induction Motors: A Case Study using ...

    kV/3ph/50 Hz Sag Mill Motor at Goldfields, Damang Mine C. K. Amuzuvi α H. Warden σ. Abstract- This paper proposes a generalised feed-forward artificial neural network model that fulfils the failure prediction of a three phase 5.8MW, 11 kV Slip-Ring SAG Mill Induction Motor at Goldfields Ghana Limited, Damang Mine. It provides

  • Gearless mill drives - Grinding ABB

    ABB’s GMD is the most powerful mill drive system in the market to power semiautogenous (SAG), ball and autogenous (AG) mills, This ’workhorse’ for grinding operations combines a robust, service-friendly and fit for purpose design to provide highest throughput, reliability

  • (PDF) Operation of High-Power Cycloconverter-Fed Gearless ...

    Power circuit of synchronous motor with two stator windings fed by a 12-pulse cycloconverter. ... Parameters of a typical synchr onous motor for a SAG Mill. ... complete power outage, if a ...

  • Mount Milligan Mill Drives - ABB

    SAG mill and two 26 ft ball mills, all made by . The drive systems that enable the mills to operate at benchmark levels of reliability, efficiency and availability were made by ABB, whose solution comprises a 23.5 MW gearless mill drive (GMD) for the SAG mill, and two 13 MW low-speed dual-pinion ring-geared mill drive (RMD) systems for the ...

  • Projects - Electric Motor Repairs Australian Winders

    Rewedge 13mw ball mill – AUSTRALIA. 18mw ball mill rewind ABB – CHILE. 12mw ABB/Alstom mill rewind – USA. 2x ABB / Alstom mills installations – USA. Sossego mine, mill Rewedge and coil change -BRAZIL. Sag mill rewind in Chile – CHILE. 2 x Sag mill installation, Sweden – SWEDEN. Rewedge ball mill in Nevada USA – USA

  • TMdrive -10SPR Product Application Guide

    Slip Power Recovery Drive System for a grinding mill SAG Mill and Motor The Best Solution: TMdrive-10SPR for each pump • The SPR drive carrying slip power is much smaller and less expensive than an MV drive carrying all the motor power at full speed (4 kV voltage) • The SPR drive has a smaller footprint than a large stator supply drive

  • Main Difference Between Synchronous and Asynchronous Motor

    The synchronous motor is a type of AC motor that runs at synchronous speed. The asynchronous motor is a type of AC motor that runs on speed less than the synchronous speed. It operates on the principle of magnetic interlocking between rotor and stator field. It operates on the principle of electromagnetic induction between stator and rotor.

  • Stator - Wikipedia

    The stator is the stationary part of a rotary system, found in electric generators, electric motors, sirens, mud motors or biological rotors.Energy flows through a stator to or from the rotating component of the system. In an electric motor, the stator provides a magnetic field that drives the rotating armature; in a generator, the stator converts the rotating magnetic field to electric current.

  • Teco-Westinghouse Custom Synchronous Motors

    TECO-Westinghouse synchronous motor are also available with brush rigging and collector rings. The complete assembly is designed for long life and is easily accessible for inspection and routine maintenance. Made of steel or other suitable materials, the collector rings are shrunk onto a steel mandrel over a Micarta insulation sleeve.

  • Online Monitoring System for Gearless and Low Speed Gear ...

    The client required an online monitoring system for its SAG mill. The stator windings in the SAG mill motor have a history of becoming loose. If untreated, loose stator windings will lead to electrical faults with the motor and if complete dislodgement occurs, damage to the stator and rotor.

  • Increasing availability through advanced Gearless Drive ...

    for a 20 MW SAG mill considering a power supply price ... complete the supply. Variable speed for process optimization The speed of the GMD can be adapted to the operational ... motor (equally distributed around the circumference of the motor – in all 4 stator segments)

  • ONLINE MONITORING SYSTEM FOR GEARLESS AND LOW

    The stator windings in the SAG mill motor have a history of becoming loose. If untreated, loose stator windings will lead to electrical faults with the motor and if complete dislodgement occurs, damage to the stator and rotor. Any downtime in the equipment for repairs is a loss in the ability to

  • Inferential measurement of SAG mill parameter' Request PDF

    Paper presents the development of phase and qd space vector models of the 2-stator winding synchronous motor used in SAG mill drives. ... complete drive system are developed. ... 2-stator

  • Wound Rotor - TECO-Westinghouse Motor Company, a

    Ball and Sag Mills Cranes Hoists Pumps Fans and Blowers Chippers Conveyors ... The unit’s stator core features insulated low-loss, high-grade electrical steel. The slot is precisely punched and ... balancing of the complete motor. Users can select either split sleeve or anti-friction bearings. USA CANADA P.O.Box 277 (78680-0277) 18060-109 ...

  • Sag Mill Syncronis Motor high axial vibration non drive ...

    Nov 01, 2014  On site we have a Sag Mill Driven by a 5500KW Motor. We have a vibration issue right across the Mill. The highest vibration is 30mm/sec RMS axial on the motor non drive end bearing.(White metal Bearing) The gear mesh frequency is 4200 CPM. The dominant frequency is 2400 CPM.

  • TMdrive -10SPR Product Application Guide

    Slip Power Recovery Drive System for a grinding mill SAG Mill and Motor The Best Solution: TMdrive-10SPR for each pump • The SPR drive carrying slip power is much smaller and less expensive than an MV drive carrying all the motor power at full speed (4 kV voltage) • The SPR drive has a smaller footprint than a large stator supply drive

  • ABB to deliver three large gearless mill drives for ...

    Mar 10, 2011  ABB’s scope of supply consists of three complete GMD systems including transformers, ring motors and E-house. One 26 MW GMD system will be installed for a 40′ diameter SAG mill, while two 20.5 MW GMD systems will be installed to drive two 27′ diameter ball mills. In addition, Kinross ordered the new ABB GAP-Watch TM for each system. GAP ...

  • Teco-Westinghouse Custom Synchronous Motors

    TECO-Westinghouse synchronous motor are also available with brush rigging and collector rings. The complete assembly is designed for long life and is easily accessible for inspection and routine maintenance. Made of steel or other suitable materials, the collector rings are shrunk onto a steel mandrel over a Micarta insulation sleeve.

  • Handbook of Electric Machines - Infineon Technologies

    Dec 03, 2019  Figure 2: Distributed winding inside stator Figure 3: Rotor of induction motor with slip-rings (2) Motor Handbook 8 Laminations (Rotor Core): Thin silicon steel (ca. 0.2~0.7 mm), reducing eddy-current losses. End-ring: Connecting rotor bars at both ends, which builds short-circuit. Rotor Bar: Rotor windings, usually made of copper or aluminum. ...

  • Difference Between Stator Rotor (with Comparison chart ...

    The stator and rotor both are the parts of the electrical motor. The significant difference between the rotor and the stator is that the rotor is the rotating part of the motor whereas the stator is the stationary part of the motor. The other differences between the stator and rotor are shown below in the comparison chart.

  • Projects - Electric Motor Repairs Australian Winders

    Rewedge 13mw ball mill – AUSTRALIA. 18mw ball mill rewind ABB – CHILE. 12mw ABB/Alstom mill rewind – USA. 2x ABB / Alstom mills installations – USA. Sossego mine, mill Rewedge and coil change -BRAZIL. Sag mill rewind in Chile – CHILE. 2 x Sag mill installation, Sweden – SWEDEN. Rewedge ball mill in Nevada USA – USA

  • Overheating Motors at Ore Processing Plant Testing - IMIA

    grinding (SAG) mill and a ball mill. The SAG mills are driven by two 3.550 kW motors sharing a single cooling system, which consists of a pair of ventilation fans, one for operation and one for standby, connected to a single duct, which then splits to feed the two motors through their bases.

  • Making remote mines and low ore grades economical and ...

    Unlike more traditional ring-geared mill drives – where a ring-shaped gear encircles the mill and drives it through one or two pinions followed by conventional motors – GMDs work by mounting rotor poles directly to the mill body and surrounding it with the stator ring, meaning the mill itself is incorporated into the motor.

  • Mining Resources - Engineered Repair Services - Wajax

    Our Engineered Repair Services (ERS) team has helped companies optimize their site performance, reduce costs and maximize the lifespan of their assets. Our technical and engineering expertise, combined with innovative reliability technologies, enables us to craft custom solutions that can help you address your organization’s environmental, social, governance and sustainability objectives, as ...