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wound rotor motor mill drives

Rewind - K&N Electric Motors

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 …

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570kw Yrq Series Wound Rotor Slip Ring Motor Ball Mill Motor

China 570kw Yrq Series Wound Rotor Slip Ring Motor Ball Mill Motor, Find details about China Yrq Motor, Wound Rotor Motor from 570kw Yrq Series Wound Rotor Slip Ring Motor Ball Mill Motor - ZCL Electric Motor Technology Co., Ltd. ... It can also drive a variety of different machines, such as fans, compressors, pumps, cutting machines, transport ...

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Wound Rotor Motor: What is it? - Motion Control Tips

Transcribed image text: A 1500 hp wound rotor motor drives a roughing mill setup to reduce a hot metal steel billet from 200mm x 200mm to 120mm x 120mm. Due to its continuous operation and in consideration of the heat, the gearbox, which the motor drives need constant circulating lubrication via an oil pump driven by a 7.5 hp motor.

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Wound Rotor Starters | Benshaw Inc. - Applied Motor Controls

Benshaw Wound Rotor Motor Starters. Wound rotor motors are typically used in application requiring high starting torques, a limited number of operating speeds, or a stepped acceleration to achieve a soft start. Typically, existing applications utilize an electro-mechanical starter on the stator, and introduce multiple stages of resistance in ...

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Wound Rotor Induction Motor: What is it? (Diagram & Speed ...

A wound rotor induction motor (also known as a would round motor or slip ring induction motor) is defined as a special type of 3 phase AC induction motor designed to provide high starting torque by connecting an external resistance to the rotor circuit. The motor's rotor is a type of wound rotor. Hence why it is also known as a wound rotor or ...

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wound rotor motor mill drives - wokmobiel.nl

Wound rotor motor - Wikipedia . A wound-rotor motor, also known as slip ring-rotor motor, is a type of induction motor where the ... A wound-rotor motor can be used in several forms of adjustable-speed drive. Certain types ... Timeline of the electric motor · Ball bearing motor · Barlow's wheel · Lynch motor · Mendocino motor · Mouse mill ...

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Ring gear drives huge grinding mill | Machine Design

In a ring-motor drive, Figure 4, a ringshaped motor encircles the mill and drives it directly without gears. The motor consists of rotating rotor elements (poles) that are bolted to …

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TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL …

systems for wound rotor motors and frequency converter drives. Improvements in power electronics technology and controls have resulted in variable frequency converters that offer high efficiency, high reliability and availability at competitive cost. The first Gearless Mill Drive (GMD) with a power of 6.5 MW was

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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, …

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SAG Mill Components - Mineral Processing & Metallurgy

The use of wound rotor motors also provides for a low inrush situation, if the power system study demands it, and makes mill speed variation possible. This variation comes generally at a sace in motor efficiency because the reduced power demand from the mill is lost in the speed control circuit.

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What Types of motors can be used with variable frequency ...

Ac asynchronous wound rotor motor: This type of motor was traditionally used in variable frequency drive when the load required a high starting torque and the strength of the power supply network was insufficient to permit Direct On-Line (DOL) starting. Variable speed operation is obtained by varying the effective resistance in the rotor circuit.

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Slip ring motors | up to 8000 kW 13800 V

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. ... For operation in mill drives, slip-ring motors also have a major advantage because they can provide full-start-up torque out of a locked-rotor ...

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Wound rotor motor - Wikipedia

A wound-rotor motor, also known as slip ring-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. Wound-rotor motors can be started with low inrush current, by inserting high resistance into the rotor circuit; as the …

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Control of Induction Motors tmp4ab487dc

The less conmion wound-rotor induction motors are used in special applications, in which the existence and accessibility of the rotor winding ... induction motor drives are still basically uncontrolled, the control functions ... paper mill, the manufacturing process in the latter case imposing narrow

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Motors | Power Conversion

Induction motors. GE's induction motor technology –medium power and large power– delivers high reliability and efficiency, primarily by drastically reducing the rotor's parts. It means a leaner, lower maintenance motor that consistently delivers the power you need. With the recent advances of GE's high powered, variable frequency drives, induction motors (medium power …

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Wound rotor motor - All industrial manufacturers

Find your wound rotor motor easily amongst the 74 products from the leading brands (FAULHABER, WEG, Baldor, ...) on DirectIndustry, the industry specialist for your professional purchases. ... 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 ...

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What is a Wound Rotor Motor and How Does it Work?

In wound rotor motors, the rotor is "wound" with wire similar to the stator, with their terminal ends connected to 3 slip rings on the output shaft. These slip rings are attached to brushes and variable power resistor banks, where operators can change the speed of the motor by varying the resistance through the rotor coils.

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Handbook of Electric Machines - Infineon Technologies

The starting torque of the squirrel-cage rotor can be increased by shaping the rotor bars. Figure 8 shows the motor characteristics of different rotor bar shapes. The change of the rotor resistance is caused by the influence of the skin effect at different slip frequencies. With increasing slip frequency, thus increasing slip, the

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vfd on slip ring "wound rotor" motors - Variable Speed ...

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 ...

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TECO-Westinghouse Wound Rotor Motors

Wound Rotor. Wound rotor motors are an extremely versatile breed of induction motors. Featuring a rugged design, these machines provide the unique ability to gradually bring up to speed high-inertia equipment and large loads smoothly and easily. Wound rotor motors also can develop high starting torque at standstill – while maintaining low inrush.

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wound rotor motor mill drives - triathlonclubsursee.ch

Wound rotor motor - Wikipedia. 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 . Danieli Corporation. Danieli Wean United hot skin-pass mill and coil dividing line to Usiminas Cosipa Brazil The new Danieli skin-passing facility ...

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Power Electronics And Motor Drives | ScienceDirect

Occasionally, wound-rotor machines are also used in the high-power range with slip power recovery control. Static Kramer and Static Scherbius drives have been used in industry for limited range speed control near the synchronous speed. A variable-frequency single- phase motor drive is difficult to achieve because of its large pulsating torque.

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BALL MILL DRIVE MOTOR CHOICES

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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EUCLID - Shelley Automation

AC Magnetic Motor Controls Euclid AC controllers are for use with new or existing wound rotor or squirrel cage motor drives. Depending on model and type, they are ideal for motor primary or secondary controls, eddy current brake hoists, counter …

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Use of wound rotor motor with VFD | Automation & Control ...

Nov 14, 2002. #2. Wound rotor motors typically are high torque-high slip motors. They have starting torque ratings about double standard motors and VFDs typically limit the starting current and torque. Older motors may not stand up to the high voltage spikes generated by the switching devices in the VFD. The secondary resistors with contactors ...

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Electric Drives for Large Ore Grinding Mills

The high-torque wound-rotor motor starts the mill under control of a resistor-contactor secondary or a stepless liquid rheostat. The latter can be regulated for constant torque or constant acceleration, or some combination as indicated. The liquid-rheostat is preferable, but a little more expensive for smaller drives.

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MOTOR TECHNOLOGY Saving energy - TMEIC

Figure 4: typical SAG mill motor drive equipment. Since such drives Figure 3: one of two wound rotor motors for a 10,000kW SAG mill ICR SEPTEMBER 2009. are in volume production at this time, support should be available for years to come. Getting renewal parts for older thyristor based SPR drive products can be

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What's the Difference? - LittleMachineShop

HiTorque Drive System: The SIEG drive on the mini lathe and mini mill incorporates a 350 Watt conventional wound rotor DC motor and PWM controller card. The gears provide two speed ranges to enhance low speed torque because the output torque of a DC drive like this falls off as the motor speed is reduced.

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UNIT 3. INDUCTION MOTORS

1. Squirrel cage rotor 2. Wound rotor Squirrel-Cage Rotor In the squirrel-cage rotor, the rotor winding consists of single copper or aluminium bars placed in the slots and short-circuited by end-rings on both sides of the rotor. Most of single phase induction motors have Squirrel-Cage rotor. One or 2 fans are

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Class 5010 Text - Steven Engineering

The following typical motor data is based on the information in AISE Standard No. 1A, AC Mill Motor Standards and NEMA Standards for Wound Rotor Motor Secondary Data. Motor primary currents are based on data published by several motor manufacturers. This information may be used to select the proper crane controllers and crane accessories.

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