cycloconverter for sag mill feet
Modeling and evaluation of cycloconverter-fed, two-stator windings SAG
A detailed evaluation of a SAG mill starting is presented using three different modeling options. First option considers a qd0 model of the two-stator windings synchronous motor fed by two 6-pulse cycloconverters. The second option considers the qd0 model of an equivalent one-stator winding synchronous motor fed by a 12-pulse cycloconverter. …
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Gearless Mill Drive Protection Improvements and Its …
Abstract—A cycloconverter-fed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating …
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Revolutionary Drive Controller for Gearless Mills
frozen charge can drop and damage the mill body or the mill bearings. Air gap supervision (static - on stator and rotating - on rotor) The Ringmotor stator is supported on the floor or on concrete pedestal and the rotor poles are mounted on the mill flange (the rotor is the mill itself). To prevent the rotor from touching the stator, the air gap
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Gearless Mill Drives
Antamina Compania Minera Antamina S.A. Peru Project: One SAG Mill and 3 Ball Mill Drive Systems Capacity: SAG Mill 1000 t/h Ball Mills 1000 t/h Consultant: Bechtel, USA Mill Builder: FFE Minerals, USA Mill Size: SAG Mill 38 feet/11,58 m Ball Mills 24 feet/7,32 m Ore processed: Copper/Zinc Drive Rating: SAG Mill 20,1 MW, 9,23 rpm Ball Mills …
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Cycloconverter Fed Capacitor Start Capacitor Run Induction …
Cycloconverter is a naturally commutated converter with bi-directional power flow capability. There are variety of applications of cycloconverter such as gearless motor drive in cement industry, centrifugal pump, electric traction, rolling mills, variable speed constant frequency (VSCF) system, ship propellers etc. Evaluation of …
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Power circuit topology of a cycloconverter-fed mill drive …
The "frozen charge" phenomena, in which the ore is packed after a mill's shut down period, is a remarkable concern for SAG mills because it can destroy the mill when it is restarted [53]. In this ...
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Cycloconverter (AC To AC Converter): Working, Circuit …
The cycloconverter is a power electronic device that converts alternating current (AC) power of one frequency to AC power of another adjustable but lower frequency without using any intermediate direct current (DC) link. It achieves this by synthesizing the output waveform from segments of the input AC supply. Cycloconverters are commonly …
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Current issues on high-power cycloconverter
Current issues on high-power cycloconverter - Fed gearless motor drives for grinding mills ... feet or greater with powers 10 MW or higher, have been ... The interior of a SAG mill is shown as a ...
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SIMINE Gearless mill drives
stops the mill with balanced charge, and with no time-wasting oscillations.In creep-ing mode at 0.3 rpm, the operator can directly control the mill while observing the mill and the material. Whether inching or creeping, you can dramatically shorten the mill's maintenance time, and thereby significantly boost availability and mill productivity. 4
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What is Cycloconverter – Types, Working Principle, Circuits …
The full wave converter is called as 6-pulse Cycloconverters or 36-thyristor Cycloconverters. A 3-pulse Cycloconverter is shown in the picture below . Here we have six sets of Rectifiers of which two is allocated for each phase. The working of this CCV is similar to single phase CCV except here the rectifiers can rectify only half the wave and ...
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Gearless mill drives
The motor is fed by a fuse-less cycloconverter that is connected to the MV network through three special cycloconverter transformers. ... Conga: The world's first 42-foot diameter 28 MW gearless SAG mill ( en - pdf - …
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Modeling and Evaluation of Cycloconverter-Fed Two-Stator …
This paper presents and evaluates three different modeling options for the SAG mill drive. The first option considers a complete model in phase and $qd0$ …
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Siemens modernises SAG mill gearless drive in Cadia Valley
This two-stage grinding circuit consists of a 40 ft SAG mill with a 20 MW Siemens gearless drive and two parallel 10 MW gear driven ball mills. Siemens has now fitted the SAG mill with a Sinamics SL 150 cycloconverter for closed-loop control as well as with a Sinamics DCM control module for the excitation circuit – the first time that both ...
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(PDF) Technical evaluation and practical …
This paper describes the application of synchronous machines fed by cycloconverter drives for rolling mills. Principles of …
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Modeling and evaluation of cycloconverter-fed, two-stator …
A detailed evaluation of a SAG mill starting is presented using three different modeling options. First option considers a qd0 model of the two-stator windings …
WhatsApp: +86 18221755073
Modeling and Evaluation of Cycloconverter-Fed Two-Stator …
This paper presents and evaluates three different modeling options for the SAG mill drive and considers the equivalent one-stator synchronous motor fed by an …
WhatsApp: +86 18221755073
Modeling and Evaluation of Cycloconverter-Fed Two-Stator …
The first option considers a qd0 model of the two-stator winding synchronous motor fed by two six-pulse cycloconverters. The second option considers the qd0 model …
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Resonance effects, power quality and reliability issues of …
For economy of scale, new projects consider grinding circuits with SAG and ball mills with 36′ or larger mill diameters with cycloconverter-fed drives with powers in the range near 20. MW.. For the huge volume of slurry flows, big pumps with low-speed gearless drives fed by medium voltage converters in the range of 1–2 MW are being …
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Gearless Mill Drive Protection Improvements and Its …
Keywords-cycloconverter; gearless mill drive; GMD; protection; minerals processing; grinding I. INTRODUCTION To process an average of 120.000 tons/day of mineral, the Laguna Seca concentrator uses a SAG mill and three ball mills, all driven by gearless mill drive (GMD) systems.
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ABB
ACS 6000c Cycloconverter for high perfomance speed and torque control of 1 to 27 MW synchronous motors. Overview Cycloconverter drives for all applications ABB provides …
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Mount Milligan mill drives
mill drive (GMD) for the SAG mill, and two 13 MW low-speed dual-pinion ring-geared mill drive (RMD) systems for the ball mills. The GMD system consists of a 23.5 MW wrap-around motor, three cycloconverter transformers, an excitation transformer, a cycloconverter and the ABB control system for the mill and its auxiliaries. Each RMD …
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Modeling and Evaluation of Cycloconverter-Fed Two-Stator-Winding SAG
Abstract: Typical drive configurations of high-capacity SAG mills use a two-stator-winding vector-controlled synchronous motor, with a 30 $^{circ} $ shift between the two windings, fed by a two-secondary delta-delta-wye power transformer and two six-pulse cycloconverters. This paper presents and evaluates three different modeling options for …
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Cycloconverter : Circuit, Working, Types, Control Strategies
The advantages of Cycloconverter include the following. Cycloconverter changes electrical power directly between various frequencies exclusive of an intermediate DC stage. This device generates output waveforms with less harmonic content which is helpful where reducing harmonic distortion is dangerous for the correct working of …
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ABB Library
The test and study work showed that a single line 42 ft SAG mill circuit gave the most favorable project economics in comparison to an equivalently powered single line 40 ft SAG mill circuit. ... Brown Boveri & Cie) installed the world's first Gearless Mill Drive (GMD) in 1969. This 6.4MW GMD powered a 16 feet (ft) cement mill in Le Havre ...
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Modeling and evaluation of cycloconverter-fed, two-stator windings SAG
A detailed evaluation of a SAG mill starting is presented using three different modeling options. First option considers a qd0 model of the two-stator windings synchronous motor fed by two 6-pulse ...
WhatsApp: +86 18221755073
Modeling and Evaluation of Cycloconverter-Fed Two-Stator-Winding SAG
A dynamic model of the dynamic behavior of the mill charge, especially during the first half turn of the SAG mill, is developed and uses the radius and angle position of themill charge center of mass. A detailed evaluation of a SAG mill starting is presented using three different modeling options. The first option considers a qd0 model of the two-stator …
WhatsApp: +86 18221755073
Modeling and Evaluation of Cycloconverter-Fed Two-Stator-Winding SAG
A detailed evaluation of a SAG mill starting is presented using three different modeling options. The first option considers a qd0 model of the two-stator winding synchronous motor fed by two six ...
WhatsApp: +86 18221755073
Modeling and evaluation of cycloconverter-fed, two-stator windings SAG
Typical drive configurations of high-capacity SAG mills uses a two-stator windings vector controlled synchronous motor, with 30º shift between the two windings, fed by a two secondary's delta-delta-wye power transformer and two 6-pulse cycloconverters. Paper presents and evaluates three different modeling options for the SAG mill drive. First …
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(PDF) Current-Source Converter and Cycloconverter …
While mill diameters have touched 42 feet, at the same time power required has gone upto 38 MW per system. ... TABLE II TYPICAL PARAMETERS OF A SYNCHRONOUS MACHINE FOR A SAG MILL V. F UTURE T REND The current source converter technology has been used in high-power adjustable-speed drives over the past two …
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Mount Milligan mill drives
mill drive (GMD) for the SAG mill, and two 13 MW low-speed dual-pinion ring-geared mill drive (RMD) systems for the ball mills. The GMD system consists of a 23.5 MW wrap …
WhatsApp: +86 18221755073
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