· Many years ago I saw a 400 HP wound rotor motor used at variable speeds The speed was controlled by controlling the rotor current The rotor current was controlled by rectifying it and then inverting it and feeding it back into the grid as regenerated power Ohm s law Not just a good idea; It s the LAW
A wound rotor induction motor is preferred While selecting an electric motor for a floor Mill which electrical characteristicswill be of least significance The range of ratings of electric motor used for rolling mills is of the order of; Guidelines All form fieds are required
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
11 07 2021 · Wound Rotors only No rotor bars for field Wound Rotors only Shaft coupling Total 3 or 6 terminals 3 for stator and 3 forcutters grinding mill motors etc Rotor have Commutators & carbon brushes always Excitation & control The speed of the motor is controlled by varying GE Energy
Title Mill Duty Wound Rotor Induction Author ADMIN Created Date 2/8/2021 6 34 37 PM
wound rotor 55 with slip ring rotor iron core with slip ring feature 17 compact large vertical small flat micro squirrel cage 5 with coder 5 with integrated driver and coder external rotor 3 hollow shaft 3 modular 3 shunt wound 3 with brake 3 with built in electromagnetic
motor or slip ring induction motor Figure 2 shows the circuit arrangement of a wound rotor induction motor with delta connected stator and a star connected rotor Figure 3 shows a kW laboratory sized wound rotor induction motor; the slip rings and brushgear can be seen clearly on the right hand side of the motor Cage Rotor Type
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
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
Consult GE Motors s entire Pegasus MHV Wound Rotor Induction Motor catalogue on DirectIndustry Page 1/6
20 01 2021 · Wound rotor induction motors c Plain squirrel cage induction motors d DC series motor 17 The most suitable motor for a steel mill requiring a motor having high starting torque wide spread range and precise speed control is a DC shunt motor b
· We operate ball mills with dual coupled 3500hp 4160v wound rotor induction motors We have recently experienced frequent arcing of the slip rings which seems to start on the center ring The arcing damages the ring badly which requires us to shutdown the mill to sand it smooth again
· 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
16 11 2021 · Slip rings and brushes are essential for synchronous motors but not in other AC motors except in wound type induction motor in which slip ring motors are used for adding external resistance to the rotor winding Synchronous motors also require additional starting mechanism for initially rotating the rotor close to the synchronous speed
30 08 2021 · RE HV Wound Rotor Motor Characteristics rbulsara Electrical 26 Aug 03 13 41 If you really want to get rid of slip rings seriously consider a MV autotransformer type starter for the replacement motors a first choice for MV motors
EXTERNAL ROTOR MOTORSbut some standard frame induction motor diagrams have been included for ease of presentation Pgs OCD//V Gamma Series D 14/17 Diags ER 1 2 4 5 OCD/ GL Gamma Series D 43/45 Diags ER 1 2 4 5 D 57/59 OCD/ Gamma Supply Series D 36/37 Diags ER 1 2 4 5 Compact axial fans B 3 Single phase motors
· 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
Three phase motors are classified mainly in two categories based on the rotor winding Armature coil winding squirrel cage and slip ring wound rotor motor Squirrel Cage Induction Motor; Slip ring or Wound Rotor Induction Motor; Related Post Brushless DC Motor BLDC Construction Working Principle & Applications
04 01 2021 · Dec 19 2021 #1 In one of our crane application where wound rotor motor has been used Motor has rotor conected in delta and external resistance is connected in star to the rotor Rotor resistance is cut through contactors but in a particular case single phasing is done in rotor ckt one phase open It is definately to reduce the torque
wound rotor 55 with slip ring rotor iron core with slip ring feature 17 compact large vertical small flat micro squirrel cage 5 with coder 5 with integrated driver and coder external rotor 3 hollow shaft 3 modular 3 shunt wound 3 with brake 3 with built in electromagnetic brake permanent magnet 2 aluminum frame 1 cast
01 06 2021 · 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
Wound Rotor Slip Ring Induction Motors This type of motor is identical to a squirrel cage induction motor except for the rotor which consists of a symmetrical three phase winding The three terminals are connected to
Electro Motors specializes in Wound Rotor Motor rewinding maintenance repairs and service in Vancouver British Columbia Our Machine Shop also offers custom repairs including machining milling and
Wound rotor motors deliver speed control of heavy and high torque s special about the wound rotor motor This type of 3 phase induction motor has high starting torque which makes it ideal for applications where standard NEMA design motors fall short The wound rotor motor is particularly effective in applications where using a squirrel cage motor may result in a starting current that s
Sag Mill Motor Complete StatorSAG Mill Drive Systems The wound rotor motor system with a solid stator closures must beThere are many paper talking about SAG mill optimization that can give you on windings in either rotor or stator large mill drives >5MW per motor are
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
10 12 2021 · Large wound rotor induction motors WRIM are a well established technology for industrial applications In the cement and mining industries high horsepower WRIMs are used on large grinding mills where they have the advantage of controlled starting characteristics and
Slip Ring Motors Wound Rotor Low and High Voltage 5 5 kW 15MW AC motors with wound rotor / slip ring 200 1000V for LV 1000 13800V for MV Compare Wishlist Wishlist
The motor was quite old and the client had previously been using an ageing stator rotor starter box with oil cooled rotor resistors The new control system formed part of a larger machine upgrade however the client was keen to keep the exis ng gearmotor arrangement 75kW Wound Rotor Control For Steel Rolling Mill
WOUND ROTOR INDUCTION MOTORS The purpose of this experiment is 1 To perform a load test on a wound rotor induction motor and document the effect added rotor resistance has on a 3 phase induction motor s torque regulation slip and efficiency PROCEDURE 1
All motors and generators serviced including induction synchronous wound rotor DC explosion proof hermetic and large submersibles Recent accomplishments Complete rewind of a 3 500 HP DC mill drive motor for a large steel mill including having special trapezoidal wire manufactured
· 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 there any advice or similar applications out there that could be helpful
3 Phase Slip Ring Induction Motors High Voltage Wound Rotor for Mill Application Output 300 1500 HP 225 1120 KW Pole Speed 8 16 Voltage 3300V Frequency Hz 50 60 Frame Size 400M 800S Protection Enclosure Drip proof IP 23 Design Standards
wound rotor high voltage electric motor made in china for rooling mill wound rotor high voltage electric motor made in china for rooling mill Ploes 4 6 8 10 12 16poles Frequency Hz 50 or 60HZ Insulation F Duty SI Protection IP 55/54/44 Ambient Temp 15 45°C Rating 200 15000 kW Rating & Performance IEC 34 7 GB/T997
· 3 Phase Slip Ring Induction Motors High Voltage Wound Rotor for Mill Application Output 300 1500 HP 225 1120 KW Pole Speed 8 16 Voltage 3300V Frequency Hz 50 60 Frame Size 400M 800S Protection Enclosure Drip proof IP 23 Design Standards IEC BS JEC NEMA Environment non hazardous
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