wound rotor motor mill drives

wound rotor motor mill drives

wound rotor motor mill drives

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wound rotor motor mill drives

  • Use of variable frequency drives with wound rotor motors

    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, centri­fugesThe induction motor drive has many applications like it is used in fans, blowers, mill runout tables, cranes conveyers, traction, etc The induction motor drive is selfstarting, or we can say when the supply is given to the motor, it starts rotating without any external supplyInduction Motor Drives Circuit GlobeFeb 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 We have sent the motor to our motor guy to refurbish and interconnect the rotor windingsIs there any advice or similar applications out there that could be helpfulvfd on slip ring "wound rotor" motors Variable Speed

  • Wound rotor motor Wikipedia

    A woundrotor motor, also known as slip ringrotor motor, is a type of induction motor where the rotor windings are connected through slip rings to external resistance Adjusting the resistance allows control of the speed/torque characteristic of the motor Woundrotor motors can be started with low inrush current, by inserting high resistance into the rotor circuit; as the motor acceleratesThis 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 The motor and pinion shafts are connected together through a flexible coupling This drive is the most compact, resulting in minimum floor spaceBall Mill Drives Mineral Processing & MetallurgyWound Rotor Motor Mill Drives A wrim is a type of induction motor with unique construction , in the cement and mining industry for starting and driving large grinding mills in fact, until about 1985, a wound rotor induction motor was the , motors on grinding mills, slip power recovery drives have been applied in other industries, such as in municipal chat onlineWound Rotor Motor Mill Drives Fact Jeugd Noord

  • TECOWestinghouse Wound Rotor Motors

    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 carboncomposite brushesOct 10, 2016· 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 JLCPCB – Prototype 10 PCBs for $2 (For Any Color) China’s Largest PCB Prototype Enterprise, 600,000+ Customers & 10,000+ Online Orders DailyWound Rotor Induction Motor The Engineering ProjectsA wound rotor induction motor has a stator like a squirrel cage induction motor, but a rotor with insulated windings brought out via slip rings and brushes However, no power is applied to the slip rings Their sole purpose is to allow resistance to be placed in series with the rotorWound Rotor Induction Motors | AC Motors | Electronics

  • Wound Rotor Induction Motors | AC Motors | Electronics

    A wound rotor induction motor has a stator like a squirrel cage induction motor, but a rotor with insulated windings brought out via slip rings and brushes However, no power is applied to the slip rings Their sole purpose is to allow resistance to be placed in series with the rotor windings while starting (figure below)Thus, rated power can be typically produced only up to 130150% of the rated nameplate speed Woundrotor synchronous motors can be run at even higher speeds In rolling mill drives, often 200300% of the base speed is used The mechanical strength of the rotor limits the maximum speed of the motorVariablefrequency drive WikipediaAltivar variable frequency drives may be used to operate woundrotor motors Most woundrotor 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 application The woundrotor motors use resistor to connect the rotor windingsCan a VFD run a woundrotor motor? Schneider Electric

  • BALL MILL DRIVE MOTOR CHOICES artecmachine

    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 highspeed synchronous motor became quite popular In more recent times the wound rotor motor with the liquid rheostat has come into use inBut why would you want to keep the slip ring part of the motor when you have a VFD? Your VFD can achieve the purposes of a slip ring and resistance starting, so I would shot out the wound rotor at the slip rings and run the motor as a normal induction motorCan a VFD drive a slip ring motor?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 millSER DRIVE

  • WoundRotor Motors — High Torque and Adjustable Speed |

    Woundrotor motors deliver speed control of heavy and hightorque loadsWhat's special about the woundrotor motor? This type of 3phase induction motor has high starting torque, which makes it ideal for applications where standard NEMA design motors fall short The woundrotor motor is particularly effective in applications where using a squirrelcage motor may result inApplication: 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, QueenslandMineral Processing | Toshiba International CorporationThe wound rotor induction motor design incorporates a three phase, star configuration rotor winding connected to slip rings, to which external resistance is connected for starting This type of motor is used when high starting torque, reduced starting current and controlled acceleration characteristics are required mill operates; in such aInduction Motor an overview | ScienceDirect Topics

  • Advantages of SER drives for SAG mills | GoHz

    Dec 19, 2014· 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 (cycloconverter) is typically used because gearboxes andThe wound rotor induction motor has some distinct application advantages Historically, it has been used for hardtostart, high inertia fans, or where power system requirements demand a soft start With a liquid rheostat, or a static secondary speed control, the wound rotor is an important alternative drive where limited range adjustable speed is requiredHV Wound Rotor Induction Motors | Power ConversionThe wound rotor motor has a lower starting torque per amp of starting current than any other type of three phase motor True The wound rotor motor can be started in multiple steps to provide smooth acceleration from 0 RPM to maximum RPMMotor Controls Final Exam Flashcards | Quizlet

  • Are there single phase wound rotor induction motors? Quora

    Dec 03, 2016· No, I've never heard of that Wound rotor motors are an old system for providing relatively efficient operation of a relatively large (eg 100+ kW) three phase AC motor at variable speeds from just a few hundred RPM to perhaps 1750 RPM Their advAltivar variable frequency drives may be used to operate woundrotor motors Most woundrotor 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 application The woundrotor motors use resistor to connect the rotor windingsCan a VFD run a woundrotor motor?May 18, 2018· 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 are the following: 1Cement Mill Process | Requirement of Mill Motors | Kiln

  • wound rotor motor mill drives casaldigioiait

    Dec 19, 2014· 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 (cycloconverter) is typically used because gearboxes andThe woundrotor induction motor (sometimes called a slipring motor) is a variation on the standard cage induction motors Woundrotor motors have a threephase winding wound on the rotor, which is terminated to slip rings The operation of the motor can be summarized as follows The rotor slip rings connect to startup resistors in order toWound Rotor Induction Motor Servo Motor, Servo DrivesMCW 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 motor75kW Wound Rotor Control For Steel Rolling Mill

  • Electrical Equipment Company Specializes in Electric Motors

    We have the largest inventory in the world composed of 100 to 20,000 HP AC electric motors in wound rotor, squirrel cage, synchronous, vertical, and DC Call Toll Free — (888) 5608122 Request A QuoteWoundRotor Drives Woundrotor induction motor speed is controlled by varying the current through the motor’s rotating armature Transistors control the current to provide smooth acceleration and deceleration Woundrotor drives are available inEddy Current and Wound Rotor Drives | Minneapolis, MNThe CSE Uniserve Rotor Drive Slip Energy Recover System (SER) is designed for speed control of wound rotor induction motors Typical applications include mills, crushers, fans and pumps Designed and manufactured in Europe to CSE Uniserve’s specifications, offers the ultimate in single or dual motor speed controlSlip Energy Recovery System Rotor Drive (SER) | CSE Uniserve

  • Wound Rotor Induction Motor, AC Low Voltage Induction

    Left hand side when viewed from nondrive end, reversible assembly at site is not possible Terminal box arrangement For KCW 450 & 500: Stator – , Rotor –