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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.
Wound rotor motor Wikipedia
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
Variable-frequency drive Wikipedia
A variable-frequency drive (VFD) or adjustable-frequency drive 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.
BALL MILL DRIVE MOTOR CHOICES Artec Machine Systems
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
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. .
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
Used Wound Rotor Motors for sale. General electric
Search for used wound rotor motors. Find General electric, Metso, Allis-Chalmers, ABB, Hardinge, P & H, and Titan for sale on Machinio.
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.
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: What is it? Motion Control Tips
Jul 17, 2017· A wound rotor motor is a variation of the three-phase induction motor, designed to provide high starting torque for loads with high inertia, while requiring very low current. Wound rotor motors are also referred to as “slip ring motors.”
What We Do: Drives Synergy Eng
WHAT WE DO: Drives. The Secondary Resistive Controller is a combination of hardware and software that controls the speed of the wound rotor motor and its torque characteristics. Synergy engineers drive systems for large industrial applications: Wound rotor motor secondary resistance control. Conveyors; Crushers; Mills; Pumps
Wound Rotor Induction Motors AC Motors Electronics
Wound Rotor Induction Motors Chapter 13 AC Motors PDF Version. 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
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
Specialty Products and Services Benshaw Advanced
Wound Rotor Motor Starters. Benshaw has successfully applied a 480VAC 700HP AC Variable Frequency Drive for positioning a MV synchronous motor driven ball mill. The Benshaw variable frequency drive powers the 4160Volt 3500HP synchronous ball mill motor during positioning to smoothly rotate the ball mill and bring it to the proper position
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 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
Torque Capabilities of DC and AC Drives in the Constant
Torque Capabilities of DC and AC Drives in the Constant Horsepower Range Using a Wound Rotor Motor Replacement as a Typical Application Example To use a wound rotor motor as an adjustable speed drive, the rotor control resistors must be rated for continuous current. If the motor
TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS
TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL DRIVES FOR GRINDING APPLICATIONS M. Ahrens, ABB, Options for variable speed are DC motors, energy recovery systems for wound rotor motors and frequency converter drives. the motor rotor. The concept to drive the mill this way is relatively
wound rotor motor mill drives vakantievillavaucluse.nl
ball mill drive motor choices Artec Machine Systems. ball mills, the starting torque restrictions of some of the newer mill drive Drive 1 A 5000 HP, 1200 rpm wound rotor motor with liquid rheostat and power factor. Get Price
TECO-Westinghouse Wound Rotor Motors
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.
Torque Capabilities of DC and AC Drives in the Constant
Torque Capabilities of DC and AC Drives in the Constant Horsepower Range Using a Wound Rotor Motor Replacement as a Typical Application Example To use a wound rotor motor as an adjustable speed drive, the rotor control resistors must be rated for continuous current. If the motor
TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS
TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL DRIVES FOR GRINDING APPLICATIONS M. Ahrens, ABB, Options for variable speed are DC motors, energy recovery systems for wound rotor motors and frequency converter drives. the motor rotor. The concept to drive the mill this way is relatively
wound rotor motor mill drives vakantievillavaucluse.nl
ball mill drive motor choices Artec Machine Systems. ball mills, the starting torque restrictions of some of the newer mill drive Drive 1 A 5000 HP, 1200 rpm wound rotor motor with liquid rheostat and power factor. Get Price
Induction Motor Drives Circuit Globe
Induction Motor Drives For variable speed applications, the DC motor drives are used in the past. But this motor has several disadvantages like the presence of commutator and brushes due to which frequent maintenance is required. This problem is overcome by the variable speed induction motor drive.
Milling Energy intensive and high maintenance
motors connected directly to the pinions driving the ring gear or by high speed motors that require a gear reducer between the pinions and the motors. Low speed motors are synchronous motors whereas the high speed solution is normally equipped with an asynchronous squirrel-cage motor. Fixed speed drives, with wound rotor motors or synchronous
Can a VFD run a wound-rotor motor?
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
Ring gear drives huge grinding mill Machine Design
Ring gear drives huge grinding mill. The higher-speed motors are either squirrel cage or wound rotor. Low-speed versions are normally synchronous motors and are used with air clutches
TECO-Westinghouse Wound Rotor Motors
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.
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.
Electrical Equipment Company Specializes in Electric Motors
We have the largest inventory in the world composed of 100 to 20,000 HP AC electric motors in wound rotor, squirrel cage, synchronous, vertical, and D.C.
liquid rotor starter for ball mill YouTube
Jun 28, 2019· The method of powering mills such as AG, SAG and Ball has a Fixed speed drives, with wound rotor motors or synchronous machines, were the
Torque of wound rotor motor with vfd drive Electric
Mar 16, 2005· A wound rotor motor with shorted rotor circuits will likely have too little slip (the torque-speed curve is too near vertical). This makes the current under overload conditions rise too rapidly causing problems for the drive, especially if the drive sizing is a bit skimpy.
Beaudry Electric Motors Repairing Wisconsin Electric
Beaudry Electric Motors has been providing Southeast Wisconsin quality electric motor and gear reducer repair using the highest quality parts and services since 1979.
Why is double winding stator mostly used in high voltage
This is what is known as a wound rotor motor. I used to see them in the paper mill where I worked as a kid, where they used a line of 400 hp units to drive the barking drums which abraded the bark from the logs before the chipper. They were used t...
Ring gear drives huge grinding mill Machine Design
Ring gear drives huge grinding mill. The higher-speed motors are either squirrel cage or wound rotor. Low-speed versions are normally synchronous motors and are used with air clutches
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.
liquid rotor starter for ball mill YouTube
Jun 28, 2019· The method of powering mills such as AG, SAG and Ball has a Fixed speed drives, with wound rotor motors or synchronous machines, were the
Torque of wound rotor motor with vfd drive Electric
Mar 16, 2005· A wound rotor motor with shorted rotor circuits will likely have too little slip (the torque-speed curve is too near vertical). This makes the current under overload conditions rise too rapidly causing problems for the drive, especially if the drive sizing is a bit skimpy.
Why is double winding stator mostly used in high voltage
This is what is known as a wound rotor motor. I used to see them in the paper mill where I worked as a kid, where they used a line of 400 hp units to drive the barking drums which abraded the bark from the logs before the chipper. They were used t...
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
Wound Rotor Induction Motors:Frequency Control electric
Dec 10, 2015· 4. Name three factors that determine the amount of torque developed by a wound rotor induction motor. 5. Explain why the wound rotor motor produces the greatest amount of starting torque per ampere of starting current of any three-phase motor. 6. Explain why controlling the rotor current controls the stator current also. 7.
Changing wound rotor drive with VFD Entries Forum
Jan 29, 2009· 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
Auto Shredding Quad Plus
Another important advantage over squirrel-cage motors is higher starting torque. A wound rotor induction 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.
Beaudry Electric Motors Repairing Wisconsin Electric
Beaudry Electric Motors has been providing Southeast Wisconsin quality electric motor and gear reducer repair using the highest quality parts and services since 1979.
LCI'S AND SYNCHRONOUS MOTORS APPLIED TO ROLLER
With a variable speed grinding table drive, every newly commissioned roller mill could be set to it's optimum speed, the speed could be adjusted at any time to suit different mill feeds, and when the mill is Finally, the last evaluated control of wound rotor motors uses a solid-state slip energy recovery system as shown in Figure 2, curve A
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.
Wound rotor motor Gpedia, Your Encyclopedia
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
Slip ring motors MENZEL Elektromotoren
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. They set technical standards in terms of size, performance, economy and reliability.
