Wound Rotor Motor Mill Drives

Wound Rotor Motor Mill Drives

Use of variable frequency drives with wound rotor …

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 ...

Induction Motor Drives - Circuit Globe

The induction motor drive has many applications like it is used in fans, blowers, mill run-out tables, cranes conveyers, traction, etc. The induction motor drive is self-starting, or we can say when the supply is given to the motor, it starts rotating without any external supply.

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 ...

Can a VFD run a wound-rotor motor? - Schneider …

Most wound-rotor motors are used where high starting torque is required so an Altivar 312, Altivar 32 or Altivar 71 drive would be most suitable for this application. 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 ...

Advantages of SER drives for SAG mills | GoHz.com

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.

BALL MILL DRIVE MOTOR CHOICES - artec-machine.com

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

Ball Mill Drives - Mineral Processing & Metallurgy

Several types of ball mill drives can be furnished, made up of various combinations of gearing, motors and transmission equipment. The correct combination to be selected takes into consideration power requirements, gear ratings, floor space, interference from other plant equipment and motor characteristics. The main types are described and illustrated on these pages. Motors considered are …

Synchronous motor - Wikipedia

A synchronous electric motor is an AC motor in which, at steady state, the rotation of the shaft is synchronized with the frequency of the supply current; the rotation period is exactly equal to an integral number of AC cycles. Synchronous motors contain multiphase AC electromagnets on the stator of the motor that create a magnetic field which rotates in time with the oscillations of the line ...

SER DRIVE

The Slip Energy Recovery Drive (S.E.R. Drive) is a technology well proven in the industry for large power motoring systems that allows precise motor speed control at the same time that recover the slip energy in the wound rotor induction motors (WRIM). The typical applications include SAG mill, AG mill and ball mill.

Mineral Processing | Toshiba International …

Application: Ball Mill Equipment: 1 x 44000kW 30 pole 6600 volt Synchronous Motor Location: Kalgoorlie, Western Australia Ernest Henry Mine Application: 1 x 11000kW SAG Mill driven by Dual 5500kW motors, 1 x 5500kW Ball Mill Equipment: 3 x 5500kW 6 pole 11000 volt Wound Rotor Induction Motors Location: Cloncurry, Queensland

vfd on slip ring "wound rotor" motors - Variable …

7-2-2008 · 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 ...

Wound Rotor - TECO-Westinghouse Motor Company

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.

Induction Motor - an overview | ScienceDirect Topics

For the wound rotor induction motor, ... the mill drive system design must include a mechanism to achieve a variable speed capability (Barratt et al., 1999). Both the synchronous and wound-rotor induction motors can be made fully variable speed if the electric AC waveforms delivered to them by the drive electrical system are modified.

Wound Rotor Induction Motors | AC Motors | …

5-5-2020 · 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).

MOTOR TECHNOLOGY Saving energy - TMEIC

mills. In fact, until about 1985, a wound rotor induction motor was the only large ac motor that controlled starting characteristics and adjustable speed capability. Stator R ot r Slip Rings 3-Phase stator connections 3-Phase rotor connections to ex tr nal si c Figure 1: wound rotor induction motor Starting duty rated Utility Interface ...

Slip Energy Recovery System Rotor Drive (SER) | …

The CSE Uniserve Rotor Drive Slip Energy Recover System (SER) is designed for speed control of wound rotor induction motors. Typical applications include mills, crushers, fans and pumps. Designed and manufactured in Europe to CSE Uniserve’s specifications, offers the ultimate in single or dual motor …

Can a VFD drive a slip ring motor?

Next the VFD must have a brake control system that measures motor torque to release brake and motor speed to set brake. Test with gradually increasing weights to determine performance max capability. Since this seems to be a matter of using an existing slip ring motor, from start not designed for VFD, the most important concern in this is the insulation of the windings, not which drive ...

TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL …

Motor The GMD is a drive system without any gear where the transmission of the torque between the motor and the mill is done 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.

Wound Rotor Induction Motor - The Engineering …

Hi friends, I hope you are fine and having fun. In my last article, we have discussed Squirrel Cage Induction Motor which is a type of 3 Phase Induction Motor.. Today, I am going to tell you about a Wound Rotor Induction Motor , which is also a type of 3 phase induction motor.

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