Wound Rotor Motor Mill Drives

Wound Rotor Motor Mill Drives

Wound Rotor Motor Mill Drives - Fact Jeugd Noord

Wound-rotor inductionommon in australia and africa, the wound-rotor motor also uses a gear system to transmit energy to the millt operates at a higher motor speed than the synchronous motor and needs an additional mechanical gear-box to reduce the motor shaft speed to the pinion speed needed to drive the mill.

Wound Rotor Motor Mill Drives - buddymobil.de

Wound Rotor Motor Mill Drives. Jan 29, 2009183 dear all, i have task to change two motor drives of wound rotor type with new vfd drives, data about old drives is given in atachments, i need some sugestions which drives should be good for this application. More Details.

Wound rotor motor - Wikipedia

A wound-rotor motor can be used in several forms of adjustable-speed drive. Certain types of variable-speed drives recover slip-frequency power from the rotor circuit and feed it back to the supply, allowing wide speed range with high energy efficiency.

Use of variable frequency drives with wound rotor motors ...

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, and rotary kilns.

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.

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

Feb 07, 2008 · Rotor resistors alter the slip of the motor and produce high slip losses. At half speed, the power dissipated in the rotor resistors is equal to the power produced to the load. For normal applications, you can apply a VFDto a slip ring motor by shorting out the rotor (no resistors) and applying the VFD to the stator as per a normal induction motor.


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.

Ball Mill Drives - Mineral Processing & Metallurgy

Where power exceeds this, drives become so large and motors become special, resulting in an uneconomical application. Generally the driven mill sheave is of split hub construction to facilitate field assembly. V-belt drives allow use of higher speed motors, generally low in initial cost. Motor speeds should be between 580 and 1160 rpm.

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 windings while starting (figure below).

Induction Motor Drives - Circuit Globe

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. The initial resistance of the supply is zero, and hence large current flows through the motor, which damages the windings of the motor.

Advantages of SER drives for SAG mills | GoHz.com

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 …

Wound-Rotor Motors — High Torque and Adjustable Speed | EC&M

Wound-rotor motors deliver speed control of heavy and high-torque loads.Whats 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 …

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

Altivar variable frequency drives may be used to operate wound-rotor motors. 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.

Variable-frequency drive - Wikipedia

Thus, rated power can be typically produced only up to 130-150% of the rated nameplate speed. 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.

#EletroTechCC Speed Control Techniques of Synchronous ...

Apr 17, 2020 · synchronous motor drive 2. Wound field motor (a)cylindrical rotor wound field motor (b) salient pole rotor wound field motor Permanent magnet motor Synchronous reluctance motor Hysteresis ...


• Drive 1 - A 5000 HP, 1200 rpm wound rotor motor with liquid rheostat and power factor correction capacitors to a dual pinion gear driven mill; • Drive 2 - A 5000 HP, 514 rpm synchronous motor with an air clutch and gear box to a center drive mill; a Drive 3 - A 5000 HP, 514 rpm synchronous motor with soft-start and an air clutch and

Can a VFD drive a slip ring motor?

Your VFD can achieve the purposes of a slip ring and resistance starting, so I would shot out the wound rotor at the slip rings and run the motor as a normal induction motor, that way I eliminate unnecessary points of potential breakdown.

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