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Oct 15, 2020· The order comprises a 22-foot diameter by 8-foot effective grinding length(egl) SAG mill and 14.5-foot diameter by 19.5-foot effective grinding length ball mill. Both mills will be driven by 2000 KW, low speed synchronous motors at 78% critical speed. The mills will be supported on 90-inch diameter hydrodynamic trunnion bearings which will be ...

Synchronous Motor. The synchronous motor doesn't rely on induction current for working. In these motors, unlike induction motor, multiphase AC electromagnets are present on the stator, which produces a rotating magnetic- field.Here rotor is of a permanent magnet which gets synced with the rotating magnetic- field and rotates in synchronous …

SAG mill Ring Motors Ball mill Ring Motors ... High current rectifiers for EW tank houses Medium and high power synchronous motors Low and medium voltage electrical systems PLC control and automation systems ... » Routine maintenance, minor and major shutdowns in SAG GMD drives. » Dielectric recovery through the application of "Cryogenic ...

Synchronous Motors. Solid Salient Pole Rotors. Power Conversion's Solid Salient Poles Motors are composed of integral solid bolt-on pole tips. Designed, built and tested in the motor factory, Solid Salient Poles Motors …

manufacturing and servicing large synchronous motors for the paper industry. Synchronous motor driving a grinder in a paper mill. Industry Standards WEM manufactures synchronous motors to meet all current industry standards including NEMA MG 1, IEEE 115, and ISO 9001:2000 standards. Motors can be designed to match your existing machines space

A comparison of SAG mill power models - SAGMILLING.COM. SAG Mill power draw models are used in mill design and grinding circuit .... The power numbers by Barratt & Sherman are fitted to "normal" cone- ... model consists of a friction balance between concentric layers within the rising part of the mill load. ... conversion factor of 0.931 between motor input (C-model result) and mill...

Synchronous machines can be found wherever there is a demand for highly efficient, cost-effective, dependable machines. They are frequently used for rolling, ball and sag mills, chippers, mixers, pulp refiners, pumps, fans, and compressor (reprocating and centrifical) drives.

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. type wpiix westinghouse 3000 kw 4079 hp ac brushless synchronous motor 200 rpm 50 hz ahlstromcegelec sag mill drive synchronous motor . the synchronous motors and pinions over the large clutches to get accurate . Learn More. Synchronous Motor For Mill Drive Advantages.

The standard inching drive motor is a NEMA or IEC frame typically foot mounted to a motor scoop or base plate. Typical motor speeds are either 4 or 6 pole, i.e. 1750 rpm or 1170 rpm for 60 Hz applications and 1450 rpm or 970 rpm for 50 Hz applications. The advantage of using a four pole motor …

sme grinding mill motors the SAG mill motor has 72 poles and the ball mill motors have 56 poles. GE Motors has designed synchronous motors up to 75,000 kW. Get Price; Sag Mill Mining Motor 4Ft Standard Cone Crusher. sag mill mining motor. AM King each with 1,500 HP Motor. Dismantled Ball Mill, SAG Mill HighPressure Grinding Rolls synchronous motor.

Oct 15, 2020· The order comprises a 22-foot diameter by 8-foot effective grinding length (egl) SAG mill and 14.5-foot diameter by 19.5-foot effective grinding length ball mill. Both mills will be driven by 2000 KW, low speed synchronous motors …

Oct 12, 2017· SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9% to 20%.This process takes place inside the large rotating drum of SAG mill …

large synchronous motor. The poles of ... stage mill (no ball mill after the SAG mill) and has a diameter and length of 32', driven by a 16.5 MW GMD from ABB. TECO-Westinghouse Motor Company synchronous motors and generators provide superior value in terms of ... ball and sag mills, chippers, mixers, pulp refiners ...

Sag Mill Synchronous Motors; Sag Mill Synchronous Motors [email protected] Get price Submit Message. Related Products && Solutions. Coal Briquetting Machine. The coal briquetting machine is used to press materials with little water content including coal, mineral powder and refractory matter.

SAG Mill (Semi-autogenous Grinding) Quantity : 1 unit Composed of a twelve-pulse cycloconverter together with a synchronous ringmotor Power : 26.000 HP Voltage : 4950 V Current : 2485 A Base Speed : 9.31 rpm Maximum Speed : 10.0 rpm Base Frequency : 5.586 Hz Maximum Frequency : 6.0 Hz The grinding mill is the rotor of the synchronous motor.

Figure 1 SAG Mill and synchronous motor. The complexity and in itial cost of a low speed sy nchronous motor and VFD is offset by the simplicity in .

SAG Mill: GM130: 24 Ft dia x 12ft SAG Mill, Allis Chalmers, with a 3,500hp Synchronous Motor, 4,000volts, Philadelphia Gear Box 720 RPM in and 84.2 RPM out, ratio 8.546:1 : 1: SAG Mill: GM135: 32 Ft dia x 16.5ft SAG Mill, Hardinge, with a 8,500hp Motor …

Construction of a SAG mill with the stator and the rotor separately mounted. Cross section of a SAG mill. Two synchronous motors coupled for testing in a factory in Brazil.

manufacturing and servicing large synchronous motors for the paper industry. Synchronous motor driving a grinder in a paper mill. Industry Standards WEM manufactures synchronous motors to meet all current industry standards including NEMA MG 1, IEEE 115, and ISO 9001:2000 standards. Motors …

Typically, the synchronous motors used in SAG mills have a power higher than 10 MW. Even ball mills have a power larger than 10 MW. For this reason, they have an important impact in energy consumption and in the operation of the power distribution system. Figure 1. Picture of a typical GMD system for a SAG mill …

Dec 19, 2014· So at say 85% speed, 15% of the motor rated power is returned from the rotor to the supply. At a hyper-synchronous speed, the SER drive feeds power into the motor rotor allowing it to run faster than synchronous speed. So for a fixed torque and higher speed, the power obtained from the motor is higher than the motor nameplate rating.

The SAG mill in phase 1 uses two 4100 kW synchronous motors and works with a constant 10.5 rpm rotational speed in two directions, and SAG mill of phase 2 uses two 3700 kW synchronous motors and works with variable speed in two directions. Since this research work was carried out with the objective of changing shell liners of the SAG mill of phase

Both mills will be driven by 2000 KW, low speed synchronous motors at 78% critical speed. The mills will be supported on 90-inch diameter hydrodynamic trunnion bearings which will be interchangeable.

Application: Ball Mill Equipment: 1 x 44000kW 30 pole 6600 volt Synchronous Motor Location: Kalgoorlie, Western Australia Ernest Henry Mine Application: 1 x 11000kW SAG Mill driven by Dual 5500kW motors, 1 x 5500kW Ball Mill Equipment: 3 x 5500kW 6 pole 11000 volt Wound Rotor Induction Motors …