wound rotor motor mill drives
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wound rotor motor mill drives

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 motor accelerates ...

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, centri­fuges ...

BROCHURE Slip ring motors ABB expertise provides the best ...

4 SLI IN MOTOR BROCRE — The most innovative technology for motors and drives More than 125 years of experience for forward-looking products ABB’s wound rotor motors are best suited to the most demanding applications. Where a high starting torque is required or a high inertia load needs to be started, then ABB’s slip ring motors are the ...

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 (cyclo-converter) is typically used because gearboxes and pinion gears reach their present limit in size.

Variable-frequency drive - Wikipedia

Wound-rotor synchronous motors can be run at even higher speeds. In rolling mill drives, often 200-300% of the base speed is used. The mechanical strength of the rotor limits the maximum speed of the motor. Fig. 1: SPWM carrier-sine input 2-level PWM output.

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

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

May 02, 2021  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.

Wound Rotor Induction Motors AC Motors Electronics ...

Feb 12, 2015  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).

Electric Drives and Motors Part-4

Jan 20, 2021  A paper mill drive. d. A cement mill drive. 6. In overhead travelling cranes_____. a. Short-time rating motors are used. b. Continuous minimum rating motors are used ... Wound rotor induction motor. 21. The drive, that can be used for derricks and winches is_____. a. DC shunt motor with Ward-Leonard control. b. AC slip-ring induction motor with ...

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, centri­fuges ...

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 ...

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 motor accelerates ...

TECO-Westinghouse 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 carbon-composite brushes.

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

May 02, 2021  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.

Wound Rotor - TECO-Westinghouse Motor Company, a

easily. Wound rotor motors also can develop high starting torque at standstill - while maintaining low inrush. Long motor life is ensured with the use of external resistor banks or liquid rheostats that dissipate heat build-up generated during motor start-up. What makes the wound rotor motor a unique induction machine is its rotor. Instead of a ...

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

Mar 22, 2021  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.

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

Electric Drives and Motors Part-4

Jan 20, 2021  A paper mill drive. d. A cement mill drive. 6. In overhead travelling cranes_____. a. Short-time rating motors are used. b. Continuous minimum rating motors are used ... Wound rotor induction motor. 21. The drive, that can be used for derricks and winches is_____. a. DC shunt motor with Ward-Leonard control. b. AC slip-ring induction motor with ...

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

MOTOR REBUILDING PROCEDURES - Casey USA

* SLIP RING MOTORS (WOUND ROTOR) * SYNCHRONOUS MOTORS * DC CRANE AND MILL DUTY MOTORS * DC GENERAL PURPOSE MOTORS NEMA FRAME SQUIRREL CAGE/INDUCTION MOTORS: Nema frame motors are available in frame sizes 48 through 505 in both drip proof and totally enclosed fan cooled (tefc) enclosures with the largest motor being typically about 25' high and ...

Ball Mill Drives - Mineral Processing Metallurgy

Mar 17, 2017  DIRECT CONNECTED Ball Mill DRIVE. When power exceeds 300 HP a direct connected drive is recommended. This 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.

Wound Rotor compared to Flux Vector Technology

And the frequency applied to the motor. The average efficiency of a Vector drive control is about 9 6 percent. The resistance control of a wound rotor motor secondary, results in an average efficiency of only 75%. In addition the capacitive Input of the drive, presents closed to unity power factor to the line, from the motor load variable.

75kW Wound Rotor Control For Steel Rolling Mill

MCW 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 motor.

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 ...

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, centri­fuges ...

Wound Rotor compared to Flux Vector Technology

And the frequency applied to the motor. The average efficiency of a Vector drive control is about 9 6 percent. The resistance control of a wound rotor motor secondary, results in an average efficiency of only 75%. In addition the capacitive Input of the drive, presents closed to unity power factor to the line, from the motor load variable.

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

May 02, 2021  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.

Wound-Rotor Motors — High Torque and Adjustable Speed

Wound-rotor motors deliver speed control of heavy and high-torque loads.What'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

(PDF) Evaluation of synchronous motors on grinding mills

Wound rotor mot or solutions are use d mostly for th eir higher st ... In twin motor drive ... This article reviews various mill drive configurations and improved SM characteristics when used with ...

MOTOR REBUILDING PROCEDURES - Casey USA

* SLIP RING MOTORS (WOUND ROTOR) * SYNCHRONOUS MOTORS * DC CRANE AND MILL DUTY MOTORS * DC GENERAL PURPOSE MOTORS NEMA FRAME SQUIRREL CAGE/INDUCTION MOTORS: Nema frame motors are available in frame sizes 48 through 505 in both drip proof and totally enclosed fan cooled (tefc) enclosures with the largest motor being typically about 25' high and ...

Infrastructure - Systems and solutions ABB

We have solutions for all motors and drives cement applications: LV MV squirrel cage motors LV - frequency converters-- Single drive up to 2800 kW-- Multi drive up to 5600 kW MV - frequency converters 315 kW up to 27000 kW Direct Torque Control (DTC) Converter transformers DC drives (new revamping) Slipring motors (wound rotor induction motors)

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

Coalmont Electrical Development

Paper Mill Systems; Rolling Mill Systems; Fiber Optic Services and Repairs; ... Paper Machine Drives and Controls. Wound Rotor Motor Upgrade. Medium Voltage Switch Gear Upgrade. VIEW ALL PROJECTS. Contact us today to get started. Call: (205) 477-4611. CONTACT US.

Ball Mill Drives - Mineral Processing Metallurgy

Mar 17, 2017  DIRECT CONNECTED Ball Mill DRIVE. When power exceeds 300 HP a direct connected drive is recommended. This 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.

Mineral Processing Toshiba International Corporation ...

Slurry Pump Drives; Conveyor Drives; Examples of completed projects include:-Windimurra Vanadium Mine Project: Windimurra Vandium Mine Application: Ball Mill Equipment: 1 x 5500kW 6 Pole 11000 volt Wound Rotor Induction Motor Location: Mount Magnet, Western Australia Kalgoorlie Consolidated Gold Mine Application: Ball Mill

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

Feb 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 windings.Is there any advice or similar applications out there that could be helpful ...

Motors and Drives AC induction motor slip What it is and ...

Nov 15, 2002  The traditional way to control wound-rotor-induction-motor speed is to increase slip by adding resistance in the rotor circuit. The slip of low-hp motors is higher than that of high-hp motors because rotor-winding resistance is greater in smaller motors. As seen in Table 1, smaller and lower-speed motors are associated with higher relative slip.

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