The subject of this paper is a synchronous drive of grinding ball mills 4 MW, 150 rpm, 6 kV, 50 Hz on the base of PWM CSI. The system is installed at the concentrating plant of Norilsknickel in
Several types of ball mill drives can be furnished, made up of various combinations of gearing, motors and transmission equipment. The correct combination to be selected takes into consideration power requirements, gear ratings, floor space, interference from other plant equipment and motor characteristics. The main types are described and illustrated on these pages. Motors considered are
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.
ball mill A ball mill, a type of grinder, is a cylindrical device used in grinding (or mixing) materials like ores, chemicals, ceramic raw materials and paints. More information →
ABB ring-geared mill drive solu-tions offer a modular concept that pro-vides a common drive control platform for induction and synchronous motors in single- and dual-pinion configurations. These drives are well-suited for all type of mills and ball mill ap-plications, and are able to cover the power range up to
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
A synchronous electric motor is an AC motor in which, at steady state, the rotation of the shaft is synchronized with the frequency of the supply current; the rotation period is exactly equal to an integral number of AC cycles. Synchronous motors contain multiphase AC electromagnets on the stator of the motor that create a magnetic field which rotates in time with the oscillations of the line
Synchronous motors have a unique and merited position as the most efficient electrical drive in the industry and are often 1-2% more efficient than induction motors. Power Factor Correction Synchronous motors can operate at leading power factors, providing VARs to the power system, reducing demand charges often caused by induction motors.
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.
7.1 Ball Mill drives with synchronous motor and air clutch/fluid coupling. 7.2 Ball Mill with slip ring induction motor. 8. Maintenance and operational issues 18 8.1 Synchronous motor and exciter 8.2 Slip ring induction motor and rheostat 8.3 Air clutch 8.4 Fluid coupling 9. Conclusions 21
Apr 17, 2014· Abstract: Synchronous motors continue to be a viable alternative to induction motors because of efficiency advantages. Long used for providing leading kVARs for PF improvement and helping with the device switching in Load Commutated Inverter (LCI) drives, these machines are efficient prime movers for large Mill applications.
Figure 7 ABB synchronous motor on Ball Mill 1 The drive requirements for the Copper Mountain mills are as follows: Rated power: 2 x 6340 kW (2 x 8500 hp) SAG mill rated motor speed 204 rpm, max. motor speed 214 rpm Ball mill rated motor speed 195 rpm, max. motor speed 209 rpm Starting torque: 150% for 15 s
ball mill synchronous motor. The variable frequency drive powers the 4160Volt 3500HPsynchronous ball mill motorduring positioning to smoothly rotate theball milland bring it to the proper position for maintenance. The customer’s previous system utilized multiple DC contactors and a motorized cam switch to position themill.
sincronous motor drive ball mill. synchronous motor for mill drive advantages. 30 results synchronous motor for mill drive advantages 4.6 3429 ratings the gulin product line,consisting of more than . Get Price. industrial drives and applications .
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
sincronous motor drive ball mill. Grinding mills and synchronous motors D'Angelo. Description: 13 ft diameter Allis Chalmers grinding mill configurable as ball or SAG mill Shell cut into multiple sections for transport, can be fit to desired length Falk Gear single helical 257 teeth with 38″ face width very little use in excellent condition
7.1 Ball Mill drives with synchronous motor and air clutch/fluid coupling. 7.2 Ball Mill with slip ring induction motor. 8. Maintenance and operational issues 18 8.1 Synchronous motor and exciter 8.2 Slip ring induction motor
Where is the synchronous motor drive with cycloconverters used? Published on 30 Sep 15. a. Compressors. b. Ball mills in cement plants. c. Fans. d. All of these. ANSWER: Ball mills in cement
Apr 17, 2014· Abstract: Synchronous motors continue to be a viable alternative to induction motors because of efficiency advantages. Long used for providing leading kVARs for PF improvement and helping with the device switching in Load Commutated Inverter (LCI) drives, these machines are efficient prime movers for large Mill
ball mill drive motor choices Artec Machine Systems,ball mills, the starting torque restrictions of some of the newer mill drive Drive 2 A 5000 HP, 514 rpm synchronous motor with an air clutch
AC adjustable speed motor drive systems are the preferred technology for new rolling mill installations and modernization projects. 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
sincronous motor drive ball mill. Grinding mills and synchronous motors D'Angelo. Description: 13 ft diameter Allis Chalmers grinding mill configurable as ball or SAG mill Shell cut into multiple sections
Synchronous motors contain multiphase AC electromagnets on the stator of the motor that create a magnetic field which rotates in time with the oscillations of the line current. The rotorwith permanent
DC Current Excited Motor Applications of Synchronous Motors. usually, synchronous motors are used for applications where precise and constant speed is required. Low power applications of these motors include positioning machines. These are also applied in robot actuators.Ball mills, clocks, record player turntables also make use of synchronous motors.
Mill application features. Frozen charge protection Detects frozen charge in the mill, minimizing equipment wear and liner replacements.; Coupling supervision Detects if a failure or slippage occurs in the couplings and stops the system in case, preventing major damages.; Stand-still detection Prevents the motors from re-starting if the mill
Jan 29, 2013· 1. synchronous motor drive 2. Wound field motor (a)cylindrical rotor wound field motor (b) salient pole rotor wound field motor Permanent magnet motor Synchronous reluctance motor Hysteresis motor 3. Modes of adjustable frequency control (i) Open loop volts/HZ control (or) separate cotrolled (or) true synchronous
The SIMINE Gearless mill drives pump system significantly enhances concentrator productivity by eliminating the reducer gear between motor and pump and all corresponding maintenance. In
CCVs are used for driving mine hoists, rolling mill main motors, ball mills for ore processing, cement kilns, ship propulsion systems, slip power recovery wound-rotor induction motors (i.e., Scherbius drives
12.5 Ft x 25.5 ft Fruitful Ball Mill, with a 1,500hp Westinghouse Synchronous Motor, 720rpm, 4,000volts, Flak Drive Reducer 720rpm in, 239 rpm out, Bull Gear 236 Teeth, 1/25 DP, 26''face,
SYNCHRONOUS MOTOR DRIVES: Operation form faced frequency supply, synchronous motor variable speed drives, and variable frequency control of multiple synchronous motors. Self-controlled synchronous motor drive employing load commutated thruster inverter. Unit 8 INDUSTRIAL DRIVES: Rolling mill drives, cement mill drives, paper mill
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