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solution either with Low Speed Synchronous Motors (LSSM) and most recently the highly reliable Low Speed Induction Motors [2]. Figure 3 shows a ball mill with a dual pinion drive 2x 6500 kW with low speed induction motors (LSIM). The dual pinion drives demand tight tolerances in the torque between the two motors [2] to dynamically
DIRECT CONNECTED Ball Mill DRIVE. When power exceeds 300 HP a direct connected drive is recommended. This drive is also applicable for lower power requirements if desired. Synchronous motors are preferred, but in some cases wound rotor motors may be used. Motor speeds will vary from 225 rpm to 450 rpm.
Dual motor grinding mill drive synchronous motor Cement Mill Drives Transmission (Mechanics) Engines Scribd The driving motors used in the cement industry can be broadly classified as Slip ring induction motor with rotor resistance starters and speed control are suited as crusher driv Function A cement mill is a drive used to. Read More
Synchronous Motors Full Speed Ahead TECO-Westinghouse synchronous motors and generators provide superior value in terms of proven reliability, low maintenance performance and long life in any application. Our synchronous machines offer numerous benefits including: Constant-speed operation High efficiency ratings Low inrush currents Leading power factor …
for the mill bearings, the mechanical mill brake control and the visualization of all parts of the drive system. Figure 1 shows a picture of a ringmotor used in copper concentrators. The poles of the rotor are directly mounted on the surface of the mill flange. Typically, the synchronous motors used in SAG mills have a power higher than 10 MW.
As the grinding process is not highly dynamic, low speed synchronous motors in mill drives can use brushless excitation. This eliminates wearing parts, helping to reduce maintenance, and keeps the ...
What we claim as new and desire to secure by Letters Patent of the United States is: 1. An electric inching control means for inching a drive system comprising a load driven through gearing by two or more three phase synchronous motors coupled to said load through respective fluid actuated clutches once said clutches are locked-up and said synchronous motors are …
The drive keeps the motor starting currents below full load amps at all times. Starting the motor across the line without the drive, the starting inrush current is six times full current. Using the drive, motor stress is significantly reduced and motor life is extended. All three grinding mills are driven by synchronous motors of identical ratings.
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,
WEG tests dual-pinion ball mill drive ... The products are part of an important order for electric motor drives for eighteen ball mills and semi-autogenous grinding (SAG) mills with dual and single pinions. ... adding to the knowledge and experience of a company which has made thousands of synchronous motors during a long history lasting more ...
Grinding Mill Drive Systems, SagBall etc; ... 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
The company supplied the KOTH project with a Ø36 x 18ft, 15 000kW Dual direct Drive Bi-directional Semi-autogenous (SAG) mill supported off multi-pad hydrostatic trunnion bearings. The direct drive mill excludes the gearboxes, with the two main drive synchronous motors controlled by an ABB VVVF (Variable Voltage, Variable Frequency Drive) and ...
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 is still rocking or moving after a …
The next largest is Asarco's 34-ft diam., 19-ft long, 14,000-hp mill in Arizona. In a ring-motor drive, Figure 4, a ringshaped motor encircles the …
Relatively small slowly varying shaft position and velocity variations superimposed on the normal running speed of dual drive grinding mill motors can cause individual motor torque variations which disturb load sharing. The magnitude of load or torque unbalance is a function of the magnitude of the mechanical variation, the type of motors used, i.e., induction or …
Mill heads are key structural components of any grinding mill. They must carry the load of the shell assembly, liners, media and material in process, and transmit it evenly to the trunnion bearings to assure smooth operation. ... If the advantages of a synchronous motor are desired on any dual pinion drive application, dual synchronous motors ...
This paper concentrate s on modern motor and drive solutions for s ingle and dual pinion ... of Grinding Mill Motors and . Drives ... is a synchronous drive of …
The working principle of this motor is almost the same as the synchronous type motor except for the external exciter. These motors also called induction motors, works on the electromagnetic induction principle, where the rotor in this motor doesn't get any electric power through conduction as in the case of DC motors .
The motors are usually rated in the range 3.5 to 9 MW and operate at a nominal speed of approximately 200 rpm. Compared to the large 30 to 40 pole synchronous motors typically used in fixed speed drives, synchronous motors for variable speed operation have only 8 to 12 poles and are less expensive, more compact and lower in weight.
Millmotor/drive High powered efficiency • Dual motor load sharing between two TM QdX4 Mill Drives. • Low speed synchronous or induction. Motor with Variable Speed Drive (VSD) • Dual motor drives are capable of: – Inching and creeping – Frozen charge detection – Use of standard temperature and • vibration sensors
Updates on geared vs gearless drive solutions for grinding mills. ... energy efficient Hyper Synchronous SER drives are now mature and ready for use on 2 X 10MW dual drive mills. Speed variation required is in the range of +/- 15% of synchronous motor speeds. VVVF drive packages from ABB and Siemens are also available for 2 x 10MW in low and ...
The Outotec QdX4™ Mill Drive features internal torque splitting capability transmitting motor input power to the pinion shaft and equally dividing into two mill pinions. This type of torque splitting gear box technology has been in operation since the early 1960's. We have rearranged the drive architecture in order to apply high ...
Electric Motors May 23, 2021. 2.5-3RPM/MIN 4W 50-60Hz AC100~127V CW/CCW Electric Electric Motor Motor Permanent Magnet Synchron Synchronous Turntable Twidec/2Pcs TYC-50-2.502. Twidec/2Pcs Synchronous Motor AC100~127V 50/60HZ Turntable Synchron Motor 4W CW/CCW Electric Motor 2.5-3RPM/MIN TYC-50-2.502 Product …
further 40 projects worldwide, energy efficient Hyper Synchronous SER drives are now mature and ready for use on 2 X 10MW dual drive mills. Speed variation required is in the range of +/- 15% of synchronous motor speeds. VVVF drive packages from ABB and Siemens are also available for 2 x 10MW in low and high speed options.
dual motor grinding mill drive synchronous motorWhat guarantees the highest product quality in rolling mills . WEG launches new cost effective variable speed drive with dual motor grinding mill drive synchronous motor WEG successfully tests dual pinion ball mill drive speed synchronous motors driven by frequency inverters for mills with dual pinions at its plant in …
200 HP (150 kW) Synchronous Motor with starter, 180 RPM. Synchronous motor and starter used to power a 7 x 10 ft Marcy ball mill Motor: - 200 HP (150 kW) - 180 RPM - 460 V Starter: - Weaver Electric Custom Control Synchronous Starter - HP 300-200 - Voltage 575-460 - Ex...
The current ball mill generall. Dual Motor Grinding Mill Drive Synchronous Motor. Ball Mill Drives Mineral Processing Metallurgy. When using a synchronous motor we recommend having 200 starting torque, 120 to 130 pullin torque, and 225 pullout torque. These assume no greater than a 10 voltage drop at the motor terminals.
Mill type Wet grinding, overflow discharge Mill drive motor size 17,000 HP Mill drive motor type Synchronous 200 RPM Inside diameter 7,315 mm Length 11,430 mm Effective grinding length (EGL) 11,886 mm Bearing type Partial Journal, 120 degree bronze insert Bearing size 3,200 mm diameter by 710 mm wide Bearing material Bronze
Grinding to the core – with pinion mill drives Horizontal mill pinion drives . SIMINE Pinion mill drives offer up to ... cover the entire power range from 1,200 to 10,000 kW in stand-alone operation and up to 20,000 kW with the use of a dual drive. ... Rugged synchronous motors and induction motors. Optimally matched components, including ...
When using a motor without bearings, the whole drive system only has two (2) pulley bearings and no couplings versus conventional design which requires twelve (12) bearings and two (2) couplings (figure 3). A low-speed synchronous motor with bearings would need two addi-tional bearings and a large coupling between the motor and drive pulley.