why it is used wound rotor motor in cement mills

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Motor Control Resistors

Motor Control Resistors are commonly used with wound-rotor motors as an external resistor circuit Conductors in the rotor are connected to slip rings, these slip rings provide the contact to the resistor circuit By changing the level of resistance in the circuit the Motor Control Resistor , speed and torque can be adjusted...

Design and Analysis of Drive System with Slip Ring ,

Rotor Motor running at 90 full speed in the grinding Mills used in large Cement Plants 3 Also, as the starting Torque developed by the Wound Rotor Motor is directly proportional to Slip ....

Use of variable frequency drives with wound rotor motors ,

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, and rotary kilns...

knowledge of cement mill motor

selection of motors in cement mills , knowledge of cement mill motor This is a 1500 KW, 33 KV, 750 RPM motor driving a Cement Mill through a gearbox cement coal mill knowledge , For the raw and cement ball-mill twin drives Slip Ring or other wound type rotor motors are used all over the , Motor Drive For Cement Ball Mill Motor ....

CG Double Cage Motor for Cement Mill High Voltage Motors

Double Cage Motor for Cement Mill For the raw and 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 Squirrel Cage motors supplied to Duna-DrĂ¡va Cement Company at Beremend...

Electric Motors for Cements Plants

OME provides for the largest cement producers in the world a wide range of medium and low voltage, also wound rotor, AC and DC electric motors to operate in the large mills, crushers, conveyors, ovens and fans contained therein In these plants, all the equipment is exposed to harsh working conditions due to the large amount of dust and temperature with high variations...

Wound Rotor Motor What is it?

A wound rotor motor is a variation of the three-phase induction motor, designed to provide high starting torque for loads with high inertia, while requiring very low current Wound rotor motors are also referred to as slip ring motors...

Selection of AC Induction Motors for Cement Plant Applications

In cement plants, proper specification and supply of AC induction motors is critical to project schedules and providing efficient production This paper focuses on the selection of AC induction motors for cement mill applications, with reference to fan, kiln and vertical mill applications The criteria for motor ,...

Horizontal mills for the cement industry

A ball mill, especially one loaded with product from a dead start, represents a very high starting torque application For fixed speed applications it remains common to provide a wound rotor AC induction motor with a slip ring that provides additional torque by energizing the rotor only during initial startup...

Motor Control Resistors

The most popular uses of Post Glover resistors are control of AC wound rotor induction motors slip ring motors , DC series wound motors, and AC squirrel cage induction motors Our resistors are also commonly used for wye-delta closed-transition starting applications...

Oscillating current in 6300KW wound rotor motor for ball mill

Oscillating current in 6300KW wound rotor motor for ball mill Oscillating current in 6300KW wound rotor motor for ball mill , We have 6300KW, 13800V, 1194 rpm Slip ring SIEMENS MOTOR used for cement grinding ball mill Recently while mill was in operation we noticed that current started to oscillate from 280 Amp to 320 Amp We also observed ....

Ring gear drives huge grinding mill Machine Design

Ring-motor drives were first used in cement industry mills and later in mining industry applications The largest ringmotor- driven mill in the world is a 36-ft diam, 16,000-hp SAG mill that ....

what is GRR Grid Rotot resistance ?Why it is used beside ,

SERIESGENERALLY THIS CONTROL USED IN Y/Y CONNECTION WOUND ROTOR MOTORS Is This Answer Correct ? 23 Yes 6 No what is GRR Grid Rotot resistance ?Why it is used beside of LRS? , motor Or rotor resistance motor , what is GRR Grid Rotot resistance ?Why it is used beside of LRS? Answer / manoj verma Grr stating toruc ....

Liquid Resistance Starter

These are used for inserting external resistance in the rotor -circuit of slip ring induction motor at the starting to reduce starting - current and increase starting - torque used in various industries and installations like cement plants, rolling mills, pumping plants, sugar mills, paper plants...

SLEEVE BEARING DESIGN FOR SLOW SPEED APPLICATIONS ,

SLEEVE BEARING DESIGN FOR SLOW SPEED APPLICATIONS IN CEMENT PLANT Sumit Singhal, Sr Product Engineer, Siemens Energy Automation , generation of hydrodynamic oil film which separates motor rotor and bearing and prevent metal to , Large electrical machines have been used in the cement industry since the turn of the century As...

Wound rotor motor

Find your wound rotor motor easily amongst the 43 products from the leading brands GE Motors, Baldor, ABB, , on DirectIndustry, the industry specialist for your professional purchas , 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 ....

LR USA Trademark

Electric Motors and Electric Motor Starters for Use with Machinery Liquid Rheostats that are used as secondary starters for wound rotor motors in recycling hammer-mill shredders, steel mills, cement ball mills, and any other wound rotor motor applications Machine parts, namely, bearings and bushings electrical insulating bushings for motor ....

Brushed DC electric motor

A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source Brushed motors were the first commercially important application of electric power to driving mechanical energy, and DC distribution systems were used for more than 100 years to operate motors in commercial and industrial buildings...

Wound Rotor Induction Motors AC Motors Electronics ,

A wound rotor induction motor has a stator like the squirrel cage induction motor, but a rotor with insulated windings brought out via slip rings and brush 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...

Ball Mill Drives

Motors considered are the squirrel cage motor, wound rotor motor, and synchronous motor One important advantage of the synchronous motor is the possible correcting of power factor within your operation, through its use When using a synchronous motor we recommend having 200 starting torque, 120 to 130 pull-in torque, and 225 pull-out torque...

Presentation wound rotor ppt

Definition of Wound Rotor A type of three phase rotor that contains windings and slip rings This motor type permits control of rotor current by connecting external resistance in series with the rotor windings 3 Terms used in Wound Rotor Slip The difference between a motor s synchronous speed and its speed at full load Percent slip is a ....

Can a VFD run a wound

The wound-rotor motors use resistor to connect the rotor windings The resistance can be adjusted to control the speed/torque characteristis of the motor To use a variable frequency drive with a wound-rotor motor the resistors would need to be shorted It is also recommended to use a dv/dt filter on the output of the drive to smooth the PWM...

Why is double winding stator mostly used in high voltage ,

This is what is known as a wound rotor motor I used to see them in the paper mill where I worked as a kid, where they used a line of 400 hp units to drive the barking drums which abraded the bark from the logs before the chipper They were used there because the motor is a relatively cheap way to ....

Medium and low voltage AC Motors

The Boron Iron Neodymium magnets used in the motors ensures motors with high power, capable of high overload without the risk of demagnetization The magnetic circuit has been studied to allow the motors to produce sinusoidal power with reduced torque rippl Low rotor inertia allow quickly accelerations and decelerations...

What are wound field motors and where are they applied?

Brushed DC motors are generally available in two types, depending on the construction of the stator permanent magnet or wound field Both motor types use current and windings to produce a magnetic field in the rotor, but they differ in how the stator magnetic field is produced via permanent magnets inside the stator or with electromagnetic windings...

TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS ,

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 As a result the motor does not have a separate motor rotor and thus no separate motor,...

Starting of slip ring induction motor explained in an easy ,

The slip ring induction motor has two distinctly separate parts, one is the stator and other is the rotor The stator circuit is rated as same in the squirrel cage motor, but the rotor is rated in frame voltage or short circuit current...

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...

Wound rotor motor

A wound-rotor 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...

Induction motors

Wound-rotor induction motors are used in applications of certain types of pump, in mine hoists, mills, and applications where speed reduction is required in the drive application Stator coil arrangement The schematic in Fig 3 illustrates the relationship between the stator coils The coils operate in pairs...