Welcome to our Mining equipment manufacturing base, Contact Us


Description: This motor was especially designed for applications where high torque to volume ratio is needed. It is a brushless DC motor with outer wound stator, rare-earth/cobalt magnets rotor and Hall effect rotor position sensor. Peak torque obtained on the axis at nominal. Continuous Torque: 35.4 In-lbs.


Table of ContentsMill Power Transmission ArrangementsRequirements for Successful Mill DriveStarting Effect on Mill Mechanical PartsInitial CostLoad SharingRisk AssessmentEvaluation and Selection Ore grinding mills are really just slowly rotating barrels, but barrels that are growing in size so fast that the application of electric drives for them is rapidly …


DIRECT CONNECTED Ball Mill DRIVE. When power exceeds 300 HP a direct connected drive is recommended. This drive is also applicable for lower power requirements if desired. Synchronous motors are preferred, but in some cases wound rotor motors may be used. Motor speeds will vary from 225 rpm to 450 rpm.


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).


Transcribed image text: Roughing mill set-up A 1500 hp wound rotor motor drives a roughing mill setup to reduce a hot metal steel billet from 200mm x 200mm to 120mm x 120mm. Due to its continuous operation and in consideration of the heat, the gearbox, which the motor drives need constant circulating lubrication via an oil pump driven by a 7.5 hp motor.


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 speed is reduced.


Advantages of the wound rotor/SER drive are: If the SER converter drive fails, the drive can be switched to fixed speed bypass - starting the usual way with the LRS. The converter only needs to be sized for 15-20% of the total motor rating with associated reduction in floor space, air-conditioning etc. The converter is only sized for the ...


where n s is the motor synchronous speed and n r is the rotor speed.. Induction motor rotors may be of two types, wound rotor or squirrel-cage rotor.A wound rotor has windings similar to and wound for the same number of poles as the stator. The rotor windings are connected to insulated slip rings mounted on the rotor shaft.


Control of a wound rotor synchronous motor (WRSM) drive for a mine hoist has to address specific properties. One of them is reliable and safe operation without sensor of the rotor position.


* SLIP RING MOTORS (WOUND ROTOR) * SYNCHRONOUS MOTORS * DC CRANE AND MILL DUTY MOTORS * DC GENERAL PURPOSE MOTORS NEMA FRAME SQUIRREL CAGE/INDUCTION MOTORS: Nema frame motors are available in frame sizes 48 through 505 in both drip proof and totally enclosed fan cooled (tefc) enclosures with the largest motor …


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 …


Find your wound rotor motor easily amongst the 74 products from the leading brands (FAULHABER, WEG, Baldor, ...) on DirectIndustry, the industry specialist for your professional purchases. ... 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 successfully ...


Stator and rotor side VSIs (VSI-S and VSI-R) of Double-Inverter-fed Wound Rotor Induction Machine (DIWRIM) drive individually feed 1 p.u. power each, to extract 2 …


Get More Information

CMP Paper 16.10.09 Final

synchronous or wound rotor motors with the power of about 2 MW. Around 10 years later, the mill sizes increased, but the necessary torque could not be transmitted by one pinion therefore dual pinion solutions were developed to power the mills. However, realization of the dual pinion


Following two types of motors are widely used for crane duty applications. Squirrel Cage Crane Duty Motors. Slip ring and Wound Rotor Crane Duty Motors. The crane motors are duty type rated for developing high starting torque with low starting current. The motors are designed to withstand stresses due to frequent starts/stops and reversals.


Wound rotor motors are also referred to as "slip ring motors.". The stator of a wound rotor motor is the same as a typical induction motor, but the rotor has a three-phase winding, with each of the winding terminals connected to separate slip rings. In contrast, a traditional induction motor (aka "squirrel cage motor") has windings that ...


Get More Information

Rewind - K&N Electric Motors

All motors and generators serviced, including induction, synchronous, wound rotor, DC, explosion proof, hermetic, and large submersibles Recent accomplishments: Complete rewind of a 3,500 HP DC mill drive motor for a large steel mill, including having special trapezoidal wire …


Yrkk High Voltage Three Phase AC Electric Slip Ring Wound Rotor Induction Motor of IP54 F Vpi 3kv 6kv for Fan Pump Crusher Cement Yrkk355-4 200kw. FOB Price: US $ 10000-210000 / Piece. Min. Order: 1 Piece.


Transcribed image text: A 1500 hp wound rotor motor drives a roughing mill setup to reduce a hot metal steel billet from 200mm x 200mm to 120mm x 120mm. Due to its continuous operation and in consideration of the heat, the gearbox, which the motor drives need constant circulating lubrication via an oil pump driven by a 7.5 hp motor.


Wound Rotor Motor Mill Drives. A wrim is a type of induction motor with unique construction, in the cement and mining industry for starting and driving large grinding mills in fact, until about 1985, a wound rotor induction motor was the, motors on grinding mills, slip power recovery drives have been applied in other industries, such as in municipal chat online.


systems for wound rotor motors and frequency converter drives. Improvements in power electronics technology and controls have resulted in variable frequency converters that offer high efficiency, high reliability and availability at competitive cost. The first Gearless Mill Drive (GMD) with a power of 6.5 MW was


Motors, variable speed drives and starters. Squirrel Cage Induction Motors (SCIM) Variable Frequency Drives (VFD) Solid-State Soft Starters (SSS) Wound Rotor Induction Motors (WRIM) Slip Energy Recovery Drives (SER DRIVES) Resistance ... for a 6500kW SAG mill. This drive will allow the mill to operate at variable speed, increasing the ...


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 ...


The Static Scherbius Drive provides the speed control of a wound rotor motor below synchronous speed. The portion of rotor AC power is converted into DC by a diode bridge. The controlled rectifier works as an inverter and converts the DC power back into AC and feeds it back to the AC source. This drive has the ability of flow the power both in ...


A paper mill drive. d. A cement mill drive. 6. In overhead travelling cranes_____. a. Short-time rating motors are used. b. Continuous minimum rating motors are used ... Wound rotor induction motor. 21. The drive, that can be used for s and winches is_____. a. DC shunt motor with Ward-Leonard control. b. AC slip-ring induction motor with ...


Abstract: Wound rotor induction motors have been popular for decades in the cement and mining industry for starting and driving large grinding mill. A wound rotor induction motor is large ac motor that controlled starting characteristics and adjustable speed capability. Slip power recovery wound rotor induction motor drives are used in high power,


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 products can be


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. ... For operation in mill drives, slip-ring motors also have a major advantage because they can provide full-start-up torque out of a locked-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, …


Get More Information

Delta Electric Motors

Electric Motor Repair Services. UL Hazardous Location Recertification. NEMA Frame Motors and above. Fractional to over 10,000 horsepower. Synchronous Motors. Wound Rotor Motors. Vertical Motors. Subemersible Pumps. MG Sets. Armatures. DC Traction and Mill Motors. Marine Propulsion. Hydro and Wind Generators. Axial Cooling Fans. Root Cause ...


Ac Squirrel cage motors draw around 500% to 900% of Full Load Current (FLC) during starting. This might not pose a huge concern when starting motors with low kilowatt (kW) ratings but as soon as one starts talking about mill drive applications where the installed motors are generally in the range of 800 kW up to 15 000 kW, it does become a concern.


Rosen Motors, L.P. Wound rotor synchronous motor-generator and field control system therefor US7276877B2 (en) * : : Honeywell International Inc. Sensorless control method and apparatus for a motor drive system US20050283324A1 (en) * : : Swanson David F


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.


asynchronous and synchronous motors have been utilized. Many mills are powered by wound rotor induction motors (WRIM) with some form of secondary control. A benefit associated with variable secondary resistance, for a wound rotor induction motor, is the reduction in starting current. This can be


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.