Wound Rotor Motor Mill Drives

Wound Rotor Motor Mill Drives

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 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.

wound rotor motor mill drives - aadvanderzwan.nl

wound rotor motor mill drives; Speed control of induction motor (7 ways to control , Speed control of induction motor by 7 ways Today I will discuss very important topic , speed control of induction motorThe speed of a three-phase induction motor driving a given load is determined by matching the torque-speed characteristics of the motor and ...

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.

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.

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 ...

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 pinion gears reach their present limit in size.


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

Torque Capabilities of DC and AC Drives in the Constant ...

the stator and rotor amps on starting inrush or by evaluating the wattage rating of the rotor control resistors. To use a wound rotor motor as an adjustable speed drive, the rotor control resistors must be rated for continuous current. If the motor is used only for a slow acceleration or high starting torque but then operates at its maximum ...

What We Do: Drives - Synergy Eng

Mill inching drives; Conveyor creep drives. Cycloconverters eliminate the need for external switching to control the magnetic field as a current’s polarity changes. Commonly used for low-speed reversible high-power motor drives, cycloconverters generate inter-harmonic currents to reduce network disturbances and voltage distortion.

Drive Solutions for the Global Mining Industry

drive application is a dual-pinion SAG mill driven by two 5,000 kW wound rotor induction motors (WRIM). Two TMdrive-10SPRs control motor speed by recovering rotor current and returning the power to the utility supply. Confi gured in a twin motor arrangement, …

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. .

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.


wound rotor motor shown below, one of ... 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 ... For a mill motor rated at 5000kW, running at 80 per cent speed, the power

Initial Start Up Testing of 1915 Vintage 750 HP Wound ...

Dec 31, 2015 · City of Memphis Gayoso Pumping Station 750 HP 6,250 Volt 116 RPM Wound Rotor Motor #3 initial Start-Up testing after rewind of both the stator and …

Whats the Difference? - LittleMachineShop.com

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.

Specialty Products and Services | Benshaw Advanced ...

Once the motor approaches full synchronous speed, the RediStart DC exciter induces a constant polarity to the rotor, causing the motor to lock into sync. Because the rotors field is constant, and separately excited, there is no slip required to produce torque, as with an induction motor, allowing the motor to run at synchronous speed.

Wound Rotor Induction Motor - The Engineering Projects

Oct 10, 2016 · A Wound Rotor Induction Motor is also known as slip ring induction motor. I will tell you about the construction of Wound Rotor Induction Motor in the first section. In the second section, I would be throwing light on the operation and working principle of Wound Rotor Induction Motor.

Wound Rotor Motor Mill Drives - dielustigenfreunde.be

ABBs Gearless mill drive system is the most powerful mill . excitation via the slip rings to the rotor of the gearless motor. . Gearless Mill Drives . obrolan online ; wound rotor motor mill drives - skinzleather. wound rotor motor mill drives. AC Motor Technologies - Applications . …

The effect of voltage dips on wound rotor induction motors ...

rotor windings and the external rotor resistors [6]. SER is an alternative approach to induction motor speed control. Modern SER drives consist of back-to-back voltage source converters which are positioned in the rotor circuit of a wound rotor induction motor (Figure 2). These converters decouple the mechanical and electrical rotor

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