wound rotor motor mill drives

  • Speed control of induction motor (7 ways to control ,

    Speed control of induction motor by 7 ways Today I will discuss very important topic , speed control of induction motorThe speed of a three-phase induction motor driving a given load is determined by matching the torque-speed characteristics of the motor and load, as shown in Fig The operating point is the intersection of the two characteristics and we can fix for a given load and motor .

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  • Gearless mill drives - Grinding | ABB

    Our GMD eliminates all mechanical components of a conventional mill drive system, such as ring-gear, pinion, gearbox, coupling, motor shaft and motor bearings: By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor

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  • Torque of wound rotor motor with vfd drive - Electric ,

    Mar 16, 2005· A wound rotor motor with shorted rotor circuits will likely have too little slip (the torque-speed curve is too near vertical) This makes the current under overload conditions rise too rapidly causing problems for the drive, especially if the drive sizing is a bit skimpy

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  • Ball Mill Drives - Metallurgist & Mineral Processing Engineer

    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 pag

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  • SER Drive

    The Slip Energy Recovery Drive (SER Drive) is a technology well proven in the industry for large power motoring systems that allows precise motor speed control at the same time that recover the slip energy in the wound rotor induction motors (WRIM) The typical applications include SAG mill, AG mill and ball mill

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  • Advantages of SER drives for SAG mills | GoHz

    For large mills requiring variable speed, the wound rotor motor and SER drive are economical for a total rating of approximately 2MW to 16MW Above 16MW, the gearless drive (cyclo-converter) is typically used because gearboxes and pinion gears reach their present limit in size

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  • Slip ring Induction Motor, How it works ? - YouTube

    Sep 18, 2018· Induction motors have been ruling the industrial world for many decad In the induction motors used in lift and hoists, you will see a type of rotor called a slip ring rotor, whereas in most of .

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  • MOTOR TECHNOLOGY Saving energy - TMEIC

    Figure 4: typical SAG mill motor drive equipment Since such drives Figure 3: one of two wound rotor motors for a 10,000kW SAG mill ICR SEPTEMBER 2009 are in volume production at this time, support should be available for years to come Getting renewal parts for older thyristor based SPR drive ,

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  • liquid rotor starter for ball mill - YouTube

    Jun 28, 2019· The steady state results of the power system study for the 6050hp motor areexperience with synchronous and - Semantic ScholarBall mill and motor 3 Ball Mill drives with synchronous motor ,

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  • LCI'S AND SYNCHRONOUS MOTORS APPLIED TO ROLLER ,

    With a variable speed grinding table drive, every newly commissioned roller mill could be set to it's optimum speed, the speed could be adjusted at any time to suit different mill feeds, and when the mill is , Finally, the last evaluated control of wound rotor motors uses a solid-state slip energy recovery system as shown in Figure 2, curve A .

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  • Torque Capabilities of DC and AC Drives in the Constant ,

    the rotor control resistors To use a wound rotor motor as an adjustable speed drive, the rotor control resistors must be rated for continuous current If the motor is used only for a slow acceleration or high starting torque but then operates at its maximum speed for the duration of the work cycle, then the resistors will be removed from the .

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  • vfd on slip ring "wound rotor" motors - Variable Speed ,

    Feb 07, 2008· vfd on slip ring "wound rotor" motors - posted in Variable Speed Drives: I am involved in converting a ball mill , which requires a large amount of starting torque, from a slip ring motor driven application to a vfd driven appl

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  • Series 5 - Drive Technology - Siemens

    As a result of their modular design, the 1R5 slipring rotor motors (US: wound-rotor motors) can be produced with various cooling systems This means that the motors can be flexibly adapted to the customers's application

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  • TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS ,

    Motor The GMD is a drive system without any gear where the transmission of the torque between the motor and the mill is done through the magnetic field in the air gap between the motor stator and the motor rotor The concept to drive the mill this way is relatively simple using the mill body as motor rotor and mounting the poles there

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  • liquid rotor starter for ball mill - YouTube

    Jun 28, 2019· The steady state results of the power system study for the 6050hp motor areexperience with synchronous and - Semantic ScholarBall mill and motor 3 Ball Mill drives with synchronous motor ,

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  • Induction Motor Drives - Circuit Globe

    Induction Motor Drives For variable speed applications, the DC motor drives are used in the past But this motor has several disadvantages like the presence of commutator and brushes due to which frequent maintenance is required This problem is overcome by the variable speed induction motor drive

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  • Winding down not out - HOIST magazine

    Better control, increased motor efficiency, and the removal of two principal wear items However, the drawback is that by grounding the rotor out internally, the characteristics of the motor change dramatically Wound rotor motors are typically NEMA Design D, with 300 per cent and more of locked rotor torque available at start

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  • HELMKE: Slip ring motors

    Slip ring motors or also called wound rotor motors are the heart in a lot of drive applications in the high power range They are most commonly used in the raw material industry like mining of ore and minerals or in the binders industry like cement, limestone and gypsum in diverse technologies of crushers, roller presses and mills but also in large fans, pumps and conveyors

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  • BALL MILL DRIVE MOTOR CHOICES - artec-machine

    the wound rotor motor was preferred In the late 1950s, when mills approached 2500 HP, the center drive mill arrangement with the enclosed geared drive using a high-speed synchronous motor became quite popular In more recent times the wound rotor motor with the liquid rheostat has come into use in

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  • Used, New & Surplus Motors, A C For Sale

    AC Electric Motors, Squirrel Cage, Synchronous, Vertical, Induction, Variable, Used, New Surplus, Rebuilt Motors, A C, 70,000 listings by 1,200 suppliers

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  • Drives & motor innovations over the last 30 years: Q&A ,

    For motors and drives below 15MW, they will most likely be integrated into a single unit known as a variable speed motor On-line diagnostics and monitoring available 24/7 via iPhone and iPad will be the norm, and customers will expect to be notified by the motor or drive well before a failure occurs

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  • Beaudry Electric Motors - Repairing Wisconsin Electric ,

    Beaudry Electric Motors has been providing Southeast Wisconsin quality electric motor and gear reducer repair using the highest quality parts and services since 1979

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  • Specialty Products and Services | Benshaw Advanced ,

    Wound Rotor Motor Starters , Benshaw has successfully applied a 480VAC 700HP AC Variable Frequency Drive for positioning a MV synchronous motor driven ball mill The Benshaw variable frequency drive powers the 4160Volt - 3500HP synchronous ball mill motor during positioning to smoothly rotate the ball mill and bring it to the proper position .

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  • Mineral Processing | Toshiba International Corporation ,

    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 Location: Cloncurry, Queensland

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  • What We Do: Drives - Synergy Eng

    WHAT WE DO: Driv The Secondary Resistive Controller is a combination of hardware and software that controls the speed of the wound rotor motor and its torque characteristics Synergy engineers drive systems for large industrial applications: Wound rotor motor secondary resistance control Conveyors; Crushers; Mills; Pumps

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