why it is used wound rotor motor in cement mills

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Large DC tandem and reversing duty mill motors, custom built wound rotor induction motors, liquid rheostats, and large synchronous machines are just a few products we offer Cement We offer large synchronous motors and wound rotor induction motors complete with liquid rheostat, primary starter and logic controls for ball mills...

Wound rotor motor

Find your wound rotor motor easily amongst the 58 products from the leading brands (GE Motors, SIEMENS, ABB, ,) on DirectIndustry, the industry specialist for your professional purchas , 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 ....

SAG Mill Components

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...

Liquid Resistance Starter

Liquid Resistance Starter These are used for inserting external resistance in the rotor - circuit of slip ring induction motor at the starting to reduce starting - current and increase starting - torque used in various industries and installations like : cement plants, rolling mills , pumping plants, sugar mills, paper plants we manufacture & supply liquid rotor resistances with both motor ....

Wound Rotor Motor: What is it?

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 series of rotor bars, a set of insulated rotor coils is used ,...

Cycloconverter

CCVs are used for driving mine hoists, rolling mill main motors, ball mills for ore processing, cement kilns, ship propulsion systems, slip power recovery wound-rotor induction motors (ie, Scherbius drives) and aircraft 400 Hz power generation The variable-frequency output of a cycloconverter can be reduced essentially to zero...

Ball Mill Drives

Motors considered are the squirrel cage motor, wound rotor motor, and synchronous motor One important advantage of the synchronous motor is the possible correcting of power factor within your operation, through its use When using a synchronous motor we recommend having 200% starting torque, 120% to 130% pull-in torque, and 225% pull-out torque...

Motor Control Resistors

Motor Control Resistors are commonly used with wound-rotor motors as an external resistor circuit Conductors in the rotor are connected to slip rings, these slip rings provide the contact to the resistor circuit By changing the level of resistance in the circuit (the Motor Control Resistor), speed and torque can be adjusted In other words ....

Why split rings are used in dc motor

Dec 13, 2011· Is DC motor used in a textile mill? , A three phase motor with 3 slip rings is a Wound Rotor motor Wound rotor motors are variable speed motors that were used ,...

Cage Induction Motor

The wound rotor induction motor design incorporates a three phase, star configuration rotor winding connected to slip rings, to which external resistance is connected for starting This type of motor is used when high starting torque, reduced starting current and ,...

Can a VFD run a wound

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 frequency drive with a wound-rotor motor the resistors would need to be shorted It is also recommended to use a dv/dt filter on the output of the drive to smooth the PWM...

Wound Rotor Induction Motor

Oct 10, 2016· Wound Rotor Induction Motor is used in applications which require smooth start and adjustable speed Some of the applications of this motor include cranes, mills, hoists and conveyors Wound rotor induction motor is also used in fans, blowers and mixers They are used ,...

Slip Ring Induction Motors

Our design experience and application expertise have made us a leading manufacturer of high voltage slip-ring inductionmotors These motors are widely used in applications requiring high starting torque or low starting current, including mill drives, cement plants, mines, utilities, water works and many more...

Lrs Principle

Wound motors are suitable for application with heavy starting duties such as ball/sag mills, crushers etc Typically LRS in these situations are used to start only, and when motor has reached a certain speed, the rotor is short circuited and it acts like an squirrel cage motor...

Starting a 6kV 3Ph

Feb 19, 2017· - Starting a 6kV 3Ph 50Hz - 2,200kW - 1,000rpm slip-ring motor for a cement ball mill ( 00:55 ) - Starten eine 6kV 3Ph 50Hz - 2,200kW - 1,000rpm Schleifringmotor für ein Zement-Kugelmühle...

AC WOUND ROTOR INDUCTION MOTOR STARTER

Jan 12, 2010· The first 2 basically are the same but with different loads In the first case, using a standard replacement induction motor could get you in trouble unless you use a VFD In the second case, any standard induction motor could be used to replace the wound rotor motor...

What's the Difference?

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...

Wound rotor motor

So, we are able to control the speed of this type of motor easily 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 ,...

Where do we use induction motors more?

Cheap, rugged, efficient, easily sealed and easy to repair The alternatives are: Synchronous motors: expensive motors, expensive controllers, only benefit is potential power factor correction DC motors: Very expensive to build, operate and maint....

Crane Motor Control Resistors

When overhead cranes are used in industrial facilities, crane resistor banks are frequently used for control of hoisting and lowering speeds, as well as positioning the crane itself Resistors are usually mounted in, or on top of, the bridge structureMany steel mills use DC motors because, in the past, DC power was the best way to hoist heavy loads...

Induction motors

Wound-rotor induction motors are used in applications of certain types of pump, in mine hoists, mills, and applications where speed reduction is required in the drive application Stator coil arrangement The schematic in Fig 3 illustrates the relationship between the stator coils The coils operate in pairs...