Gearless Ball Mill Operation
The 17 ft. x 56 ft. double compartment ball mill at St. Lawrence Cement Company has the first gearless drive built in North America and has the world's largest hydrodynamic bearings currently built and running. ... The mill is powered by a synchronous motor rated 8750 HP, 14.5 rpm, 1.0. PF, 1900 volts, 3 phase, 4.84 Hz, 1.0 …
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Mill drive selection for semiautogenous grinding mills
Secondary ball mill, ac synchronized motor coupled to a gear mill, $2.5 million 18x27 drive with an air clutch. motor, $602,000 6050 ... The ac synchronous motors used in the gear and gearless drives have a higher efficiency than the dc drive. Thus: for large motor horsepowers, the efficiency
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Mill drive selection for semiautogenous grinding mills
ball mills, 18x27 drive with an air clutch. motor, $602,000 6050 F Ptimary SAG, 34x16 Ringmotor system. mill, $3.1 million 22,500 motor, $7 million 12,050 Two secondary ac …
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Synchronous Motor Applications
Synchronous motors are used mainly for power factor corrections, voltage regulation, and constant speed- constant torque applications. Squirrel cage induction motors are the preferred choice for motor and drive system applications. Synchronous motors are not commonly used for outputs below 40 kW due to their higher cost. In addition to the …
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[Solved] Synchronous motor is used for
Synchronous motors: The important characteristic of the synchronous motor is its constant speed irrespective of the load conditions and variable power factor operation. Due to constant speed characteristics, it is used in machine tools, motor generator sets, synchronous clocks, stroboscopic devices, timing devices, belt-driven …
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Synchronous Motor: Construction, Working Principle
A synchronous motor is an AC motor, which is identical to the alternator or synchronous generator. Similar to the dc generator, the synchronous generator can be made to run as a synchronous motor when driven electrically. The synchronous motor converts the electrical energy input into mechanical energy. In the synchronous motor, …
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Synchronous Motors | AC Motors | Electronics Textbook
The number of poles is n. For rotor speed in rpm, multiply by 60. S = f120/n where: S = rotor speed in rpm f = AC line frequency n = number of poles per phase. The 3-phase 4-pole (per phase) synchronous motor will rotate at 1800 rpm with 60 Hz power or 1500 rpm with 50 Hz power. If the coils are energized one at a time in the sequence φ-1, φ ...
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Synchronous Motors
Synchronous Motor Driving a Ball Mill Ball Mill and Motor Dual Motor Load Shown for Ball Mill Industry Standards WEM manufactures synchronous motors to meet all current industry standards including NEMA MG 1, IEEE 115, IEC 60034 and ISO 9001:2000 standards. Motors can be designed to match your existing machines space limitations,
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crusher/sbm synchronous motor specficiions which for ball mills…
sbm synchronous motor specficiions which for ball millsNew & Used 1 4 HP Single Phase Induction and Synchronous. Savona Equipment is a 1 4 HP single phase electric motor wholesale supplier.We buy,sell and consign low voltage motors.Our inventory includes top brands of single phase motors made by General …
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Used Ball Mills (Mineral Processing) in Philippines
Mill, Ball, 9' X 15', Kobe-Allis Chalmers, 600 HP, #D733559. used. Manufacturer: Allis-Chalmers; Ball mill, 9'diameter (2745mm) x 15' long (4570mm), manufactured by Kobe-Allis. Last used as regrind ball mills in copper circuit, each complete with Yasakawa 450 kW (603 HP) synchronous motors, 3300V, 60 cycles....
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VFD Ball Mill Solutions | Benshaw Inc.
Working with a long time customer and local partner in the motor controls industry, Benshaw was able to solve this problem by applying a 480VAC 700HP AC variable frequency drive. The Benshaw VFD powers the 4160 volt – 3500HP synchronous ball mill motor during positioning to smoothly rotate the ball mill and bring it to the …
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Ball mill drive system: (a) traditional drive mode; and …
The large permanent magnet synchronous machine (PMSM) brings great difficulties in manufacture, assembly, and maintenance. A kind of unwinding stator module-combined permanent magnet synchronous ...
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Synchronous Motors: Definition, Working Principle, Types…
Synchronous motors are usually used where there is a need for precise and constant speed. Low power applications of these motors include positioning machines. This kind of electric motors is also applied in robot actuators. Some other applications make use of synchronous motors such as ball mills, clocks, and record player turntables.
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BALL MILL DRIVE MOTOR CHOICES
The mill used for this comparison is a 4.4-meter diameter by 13.6 meter long ball mill with a 5000 HP drive motor. It is designed for approximately 90 s.ton per hour. This type two-compartment mill is a state- of-the-art shell supported cement finish mill. The torque and time requirements of the mill with the ball
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BROCHURE Synchronous motors High …
Variable speed synchronous motors are often used in demanding applications in process industries and in applications where variable speed delivers clear benefits. Rolling mills, …
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The engineering and process effects of choosing a …
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Choosing the Right Motors for your Mills
WEB•Three commonly used mill motor types: –Gearless drives •largest size, up to 28 MW •highest efficiency –Synchronous with pinion •one or two pinion configuration, up to 15.6 …
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1000 HP KVS (Kennedy Van Saun) Ball Mill | 17092 | New Used …
Used 11.5' diameter X 17' long ball mill. Manufactured by KVS (Kennedy Van Saun). 1000 HP open winding synchronous motor. Features trommel discharge and feed tank. Refurbished in 2013, which included installation of new oil jacking system, oil lube system for Babbitt bearings, new titanium steel water jet-machined discharge grates, and motor …
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Synchronous Motor Advantages, Disadvantages
Advantages of Synchronous Motor. 1. Its power facto r can be controlled by the control of field current. Also Read: Physical significance of power factor. 2. In certain applications, the fact that its speed is independent of load and applied voltage, may be important. 3. It's efficiency is slightly higher than that of induction motor.
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Motors for Metal Rolling Mills | TMEIC
TMEIC designs and manufactures two types of AC solutions for this purpose. Salient pole synchronous motors that meet the high power and torque demands of a hot strip mill, as well as roughing and finishing stands. Squirrel cage rotor motor applied to medium power requirements of reels and stands. Meets NEMA MG1 and JEM 1157 standards.
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Synchronous Motor: Features, Applications, Advantages and Disadvantages
The synchronous motors have the following advantages −. It operates at a constant speed (i.e., synchronous speed) from no-load to full-load. Power factor of a synchronous motor can be easily controlled by changing the excitation of the motor. For low speed (< 300 RPM) applications, synchronous motors are more economical than …
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Ball Mill Positioning
Synchronous Ball Mill Motor Ball mills are used in many industries to grind coarse material into a fine powder. A ball mill typically consists of an horizontal cylinder partly filled with steel balls that rotates on its axis, imparting a tumbling and cascading action to the balls. In cement manufacturing, clinker
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BALL MILL DRIVE MOTOR CHOICES
B. SYNCHRONOUS MOTOR WITH AIR CLUTCH The high starting torque design synchronous motors directly connected to the mills have been used for years. This …
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Inching Solutions | Benshaw Inc.
The Benshaw variable frequency drive powers the 4160v synchronous ball mill motor during positioning to smoothly rotate the ball mill, providing full torque at …
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Used Allis-Chalmers Ball Mills (Mineral Processing)
Mill, Ball, 10'x14', Allis Chalmers, 800 HP #D744959. used. Manufacturer: Allis-Chalmers. Allis Chalmers Ball Mill, 10' diameter x 14' long, driven by Westinghouse 800 HP Synchronous Motor, 3-phase, 275 RPM, 4160 Volts. Includes helical pinon gear, rubber liners, trunnions, Babbitt bearings, and lube ...
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Ball Mill
Ball mills are among the most variable and effective tools when it comes to size reduction of hard, brittle or fibrous materials. The variety of grinding modes, usable volumes and available grinding tool materials make ball mills the perfect match for a vast range of applications. Cooling, heating & cryogenic grinding.
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Elom-TDMK high torque ball mill synchronous motor
TDMK high voltage synchronous ball mill Motor. TDMK high voltage synchronous ball mill Motor are design with high starting torque, high inertia requirement, is ou r new design products, they are high efficiency and perfect performance,they are proved to be reliable to match diffrent industry clients needs. the applications where our motors are ...
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STEPPING FORWARD: USING VARIABLE SPEED …
Current grinding technology based on tumbling mills is a mature and well-known process which enjoys the confidence of most end users. An electric motor (asynchronous or synchronous machine, depending on the application) is the link between the electrical energy source and the mechanical load, the tumbling mill.
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Allis Chalmers 13' X 39' (4m X 12m) Ball Mill With 4000 Hp Motor
ALLIS CHALMERS 13' x 39' (4m x 12m) Ball Mill with 4000 HP Motor. Item #: 6C-DAN02. Print. Questions. Share Facebook Twitter Linkedin Email Sell Us Yours. Categories: GRINDING EQUIPMENT. Sub-Category: BALL MILLS. Location: North America. Manufacturer: ... G.E. 4000 HP Synchronous Motor
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Synchronous Motors: Applications And Working Principle
The applications of synchronous motors include: A synchronous motor having no load connected to its shaft is used for power factor improvement. Owing to its characteristics to behave at any electrical power factor, it is used in power systems in situations where static capacitors are expensive. Synchronous motor finds applications …
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id/22/synchronous motor specficications which used for ball mills…
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