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wound rotor motor mill drives

IET Digital Library Variable Frequency AC Motor Drive Systems

2 Power switching devices Show details Hide details p 54 103 50 There is a very wide range and variety of semiconductor switching devices which can be considered for use in AC variable speed drives and this chapter explains the principles the capabilities and the performance characteristics of those devices which are most likely to be used for this purpose

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ball mill wound rotor moror starting

Wound Rotor Motor And Ball Mill Starting Curve liquid rotor starter for ball mill samac mining ball mill liquid rotor starter Ball MILL drive motor choices666 Кб In more recent times the wound rotor motor with the liquid rheostat has come into use in North America whenThis solution meets the requirements of all gear trains on the market

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Slip ring motors up to 8000 kW 13800 V

They are used in various industries such as cement paper water or steel and are employed there as drives for mills compressors blowers refiners shredders etc MENZEL slip ring motors also called wound rotor motors are available in all current motor cooling and protection types for low voltage from 75 kW as well as medium and high voltage up to 15000 kW

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Induction Motor

Induction Motors Wound rotor • Most motors use the squirrel cage rotor because of the robust and maintenance free construction • However large older motors use a wound rotor with three phase windings placed in the rotor slots • The windings are connected in

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Brushless DC electric motor

Brushless vs brushed motors Brushed DC motors were invented in the 19th century and are common Brushless DC motors were made possible by the development of solid state electronics in the electric motor develops torque by alternating the polarity of rotating magnets attached to the rotor the rotating part of the machine and stationary magnets on the stator which surrounds the rotor

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Gearless mill drives ABB

2 GEARLESS MILL DES The gearless mill drive eliminates ring gear pinion gearbox coupling motor shaft and motor bearings used within a conventional mill drive system By mounting the rotor poles directly onto the mill the mill itself becomes the rotor of the gearless motor Building a track record

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Variable Speed Drives & MV/HV Motors CSE

With Wound Rotor WRM and Squirrel Cage SCM options CSE Universe can design and manufacture a motor to suit existing or new applications Talk to us about drop in replacements for other brands or upgrading your plant to higher levels of output and efficiency

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Slip Ring Motor MCQ [Free PDF] Objective Question Answer

Brush friction or contact losses in wound rotor induction motor Generally in a slip ring or wound rotor induction motor the three terminals of the star connected rotor windings are brought out and are connected to external resistors through the slip rings and brush arrangement mounted on the shaft ; Brushes sliding on the slip rings are used for making the connection of rotor windings with

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AUTOMATIC ON LINE OPTIMIZATION OF AC WOUND MOTOR S ROTOR

1 AUTOMATIC ON LINE OPTIMIZATION OF AC WOUND MOTOR S ROTOR RESISTORS IN ADVANCED INDUSTRIAL CRANE CONTROLLER Fetah Kolonic 1 Alojz Slutej 2 Alen Poljugan 1 1 Faculty of Electrical Engineering and Computing HR 10000 Zagreb Croatia tel /fax 385 1 6129 824/ 6129705 e mail

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Starter of SAG Mills with rotor resistance VFD AC

17/9/2021 · Wound rotor motors are suitable and recommended for application for MV drive where it is required to be started on load such as ID Fans Fans Drill etc As you aware the torque is directly proportional to the rotor resistance r2 & varies with slip S hence injection of resistance into the rotor via Slip Rings High Starting Torque can be got while the Speed efficiency and Starting

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4 Wound Rotor and Synchronous Motors AC Motor Designs

The rotor of a wound rotor motor has more windings than the squirrel cage of a typical AC induction motor The induced voltage in the rotor is higher and the current is lower During start up a typical rotor has 3 poles connected to the slip ring Each pole is wired in series with a variable power resistor

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wound motor with liquid resistor starter for mill

Wound Rotor Induction Motor Slip Power Recovery Wound Rotor Induction Motor driving a Grinding Mill A WRIM has a 3 phase wound stator that is usually connected directly to the power system The rotor has a 3 phase winding with the three terminals connected to separate slip rings which are normally connected to a liquid rheostat or resistor bank

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Wound Rotor Motor Resistor Electric motors & generators

28 03 2021 · We have a 250 HP wound rotor motor that came with a salvaged rod mill that is going to be put back in service at another nine site The nameplate has been lost We have a consultant s interconnection diagram from the installation that shows a 4 stage resistor bank in connected to what I would call a tap changer which is drawn like it is manually operated

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Three Phase AC Motors Wound Rotor TEFC

Rigidly sealed Terminal Box at RHS when viewed from drive end Suitable for flexible direct coupling or belt drives with Load GD2 equal to Motor GD2 Suitable for starting with external resistance in the rotor circuit THREE PHASE AC MOTORS WOUND ROTOR TEFC SPECIFICATIONS 415V / 10% 3 Ph AC 50 / 5% 55 IC 411 o 500c 75 kW 180 280

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What are slip rings and why do some motors use them

In a version of the AC induction motor referred to as a wound rotor motor slip rings are used not for transferring power but for inserting resistance into the rotor windings A wound rotor motor uses three slip rings — typically made of copper or a copper alloy — mounted to but insulated from the motor

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P Series High Power Heavy Duty Planetary Gearboxes

P Series High Power Heavy Duty Planetary Gearboxes Rated Power 12 934 kW Rated Ratio 25 4000 Output Speed 60 r/min 185 2500 kw high torque wound rotor induction motor ; 160 2021 kw high power high voltage squirrel cage electric motor ; Brake motors Pipe Rolling Mill Drives Tube Mill Drives Sewage treatment Dredgers

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AN2388 Application note Home

Three phase induction motor and classical AC drives Three phase AC induction motor are widely used in many fields They are classified in two categories Squirrel cage motor Wound rotor motor 90% of the three phase AC Induction motors are squirrel

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gearless sag mill slip ring motor

what are ring motors for sag mills ABB s Gearless mill drive system is the SAG ball and autogenous AG mills excitation via the slip rings to the rotor of the gearless motor abb drives sag mill dctm gearless ring motor for sag mill principles Grinding gearless ring motor for sag mill principles sag mill dual pinion geared drive

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Mining and Processing WEG

In addition to the operating advantages of the wound rotor induction motor WEG have developed a new motorized brush lifting devise which is responsible for the short circuit of the rotor when the motor reaches its rated speed taking advantage of high starting torques and low starting current together with minimum brush and slip ring wear

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Heavy Industrial Controls Industrial Controls Electrical

By Electric Controller and Manufacturing Company For use with ac wound rotor motor on hoist and travel drives of general purpose overhead cranes The hoist controllers are of the reversing dynamic lowering type when used on cranes without mechanical load brakes and are of the reversing hoist type when used on cranes with mechanical load brakes

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ball mill motor starting curves

wound rotor motor and ball mill starting curve ball mill motor starting curves nagpur ball mill motor starting curves conveyors compressors and ball mills for drives Slip Ring or other wound type rotor motors are used all Free Quote

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NEW LOCKED CHARGE PROTECTION SYSTEM PREVENTS

the mill is starting up and trips the mill if the ore angle exceeds a trip angle setting The calculation of the ore angle is derived from the mill motor rotor currents only no mechanical transducers are required The head of Gold Fields West Africa Peter Turner says of the new system This is excellent work and the

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Use of wound rotor motor with VFD Automation & Control

14 08 2021 · 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 said that most VFDs only hold 200% if that current for a very limited time before

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Ball Mill Liquid Rotor Starter Logan Sainlez

Liquid rotor starter for ball millhenan mechanic wound rotor induction motor with liquid rheostat suitable starter for ball mill starting through slipring motor 11 kv 2600 kw a slip ring motor uses resistors in get price new experience with synchronous and cimentec

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A 3 V 50 Hz 6 pole Wound rot

Question A 3 V 50 Hz 6 pole Wound rotor Induction Motor Drives A Variable speed Centrifugal Pump When The Motor Is Connected To 4100 V Line The Open circuit Rotor Line Voltage Is A 1800 V A 3 phase 4100 V/500 V Transformer Is

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ELECTRICAL ENGINEERING IMPORTANT MCQ INDUSTRIAL DRIVERS

· ELECTRICAL ENGINEERING IMPORTANT MCQ INDUSTRIAL DRIVERS Harikesh Yadav EE MCQ PDF While selecting an electric motor for a floor mill Wound rotor induction motor Ans b 28 Belted slip ring induction motor is almost invariably

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The effect of voltage dips on wound rotor induction motors

Key words Slip energy recovery trapped flux voltage dips wound rotor induction motors 1 INTRODUCTION SER drives provide a cost effective means of achieving speed control of large induction motors and have been used extensively in industry driving mill fan and pump loads These drives are advantageous as they offer a wide range of speed

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LITERATURE SURVEY OF PERMANENT MAGNET AC MOTORS AND DRIVES

synchronous motor PMSM drive since the motor was originally produced by replacing the field coil and slip rings of a wound rotor synchronous motor with a permanent magnet It should be noted that this definition is by no means standard and that other

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