Wound rotor motor mill drives

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Grinding Mills Application

  • Use of variable frequency drives with wound rotor …

    Jim McKee (deceased) Alabama Electric Motor Service Sheffield, Alabama Technical Education Committee Member The slip ring or wound rotor induction motor (WRIM) has been used in a variety of applications. Many of these applications use the WRIM's high starting torque capabil­ity while limiting current to start and run very high inertia loads such as hammer mills, rolling mills, centri­fuges ...

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  • ball mill wound rotor moror starting - hausbau …

    ball mill liquid rotor starter . 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. Contact Us

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  • MOTOR TECHNOLOGY Saving energy

    mills. In fact, until about 1985, a wound rotor induction motor was the only large ac motor that controlled starting characteristics and adjustable speed capability. Stator R ot r Slip Rings 3-Phase stator connections 3-Phase rotor connections to ex tr nal si c Figure 1: wound rotor induction motor Starting duty rated Utility Interface ...

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  • Advantages of SER drives for SAG mills | GoHz.com

    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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  • Wound Rotor - TECO-Westinghouse Motor …

    What makes the wound rotor motor a unique induction machine is its rotor. Instead of a series of rotor bars, a set of insulated rotor coils is used to accept external impedances. The rotor windings are similar to those found on a DC armature, with the coils connected together to a set of rings that make contact with carbon-composite brushes.

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  • Mouse mill motor - Wikipedia

    Froment's "mouse mill" motor was an early form of electric motor, also known as the Revolving Armature Engine. It has similarities to both the synchronous motor and the contemporary stepper motor.. As the mouse mill motor was simple to construct and its speed could easily be governed, it was later used to drive automatic recorders in telegraphy.

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  • Cement Mill Process | Requirement of Mill Motors …

    Kiln Drives. The rotary kiln drives depend upon the type of Cement Mill Process (wet or dry). These are, in general, tubular tilted from the horizontal position with a ring fitted around them. This ring gear engages with one or two pinions. A variable speed motor drives the pinion. The requirements of a kiln motor …

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  • ball mill liquid rotor starter - populareducation.co.za

    Fixed speed drives, with wound rotor motors or synchronous machines, were the ... Liquid Resistor Starter (LRS) are containing agitated mechanical parts requiring... Read More. Starting of slip ring induction motor explained in an easy manner. ... where a 600kW ball mill motor is started by use of a secondary liquid. Read More. Wound Rotor ...

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  • Slip Ring Induction Motors - Baldor.com

    These motors are widely used in applications requiring high starting torque or low starting current, including mill drives, cement plants, mines, utilities, water works and many more. Features Separate slip ring comparment at non drive end to prevent dust ingress into motor windings

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  • why it is used wound rotor motor in cement mills

    wound rotor motor mill drives - ZCRUSHER. Why use resistors for motor control? ... Applications for resistors in motor control Wound Rotor Motors with Slip Rings. This type of motor is still used for high ...

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  • 75kW Wound Rotor Control For Steel Rolling Mill

    MCW were asked to produce a control system for 75kW slip ring fed, wound rotor induction motor that was being used to drive a steel rolling mill via a Radicon gearbox. At the heart of the system MCW used the Fairford Synergy intelligent soft starter to provide a controlled soft start and soft stop for the motor.

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  • Mineral Processing | Toshiba International …

    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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  • Wound rotor motor - Wikipedia, the free …

    A wound-rotor motor is a type of induction motor where the rotor windings are connected through slip rings to external resistances. Adjusting the resistance allows control of the speed/torque characteristic of the motor. Wound-rotor motors can be started with low inrush current, by inserting high resistance into the rotor circuit; as the motor accelerates, the resistance can be decreased.

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  • Product information ECOSS Electronic compact starter for ...

    wound rotor drives Electronic compact ... − Crushers and mills − Mixers − Agitators Power range Drives with slip-ring motors in a power range up to approx. ... The following data for the drive and motor is required at the very least for the precise design of the compact starter, such

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  • vsk rotor cement mill

    vsk rotor cement mill - jorsa.org. CG Double Cage Motor for Cement Mill. ( High Double Cage Motor for Cement Mill. For the raw and cement ball-mill twin drives Slip Ring or other wound type rotor ...

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  • Wound Rotor Induction Motor, AC Low Voltage …

    KECL Manufacture of wound rotor induction motors with Low Voltage, Rerolling Mill Duty Motor, Non corrosive & non hazardous in nature.

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  • Can a VFD run a wound-rotor motor? - Schneider …

    Wound-rotor motor Product Line: Altivar drives Environment: All models and serial numbers Cause: None Resolution: Altivar variable frequency drives may be used to operate wound-rotor motors. Most wound-rotor motors are used where high starting torque is required so an Altivar 312, Altivar 32 or Altivar 71 drive would be most suitable for this ...

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  • Wound rotor motor - All industrial manufacturers

    The wound rotor induction motor has some distinct application advantages. Historically, ... cement ball-mill twin drives Slip Ring or other wound type rotor motors are used all over the world. CG Hungary is the first in the world to successfully break this tradition with double ...

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  • BALL MILL DRIVE MOTOR CHOICES - Artec Machine Systems

    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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  • Use of wound rotor motor with VFD | Automation …

    14-8-2003· I used to design wound rotor starters, and a VFD can work, but as some people mentioned, not always. A Wound rotor motor has double or more starting torque avaible to it, and this torque is (as mentioedn in one reply) a factor of the motor so the VFD will not hurt the rated starting torque....having said that, most VFDs only hold 200% (if that) current for a very limited time before they kick ...

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  • vfd on slip ring "wound rotor" motors - Variable …

    7-2-2008· 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. . We have sent the motor to our motor guy to refurbish and interconnect the rotor windings.Is there any advice or similar applications out there that could be helpful ...

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  • Wound Rotor Induction Motor - The Engineering …

    Wound Rotor Induction Motor is used in applications which require smooth start and adjustable speed. Some of the applications of this motor include cranes, mills, hoists and conveyors. Wound rotor induction motor is also used in fans, blowers and mixers. They are used in large pumps in water industry.

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  • Resource Library - EASA | The Electro•Mechanical …

    When rewinding any wound-rotor motor, watch for consequent-pole connections. Grouping alone is not a reliable indicator of poles. The best way to understand the process is to visualize the rotating electrical field in the stator of a wound-rotor motor. The field rotates one direction, so that when the rotor is driven in the opposite direction ...

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  • Changing wound rotor drive with VFD - Entries - …

    Posts: 43. Rating: (0) Dear all, i have task to change two motor drives of wound rotor type with new VFD drives, data about old drives is given in atachments, i need some sugestions which drives should be good for this application

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