US3259156A US367120A US36712064A US3259156A US 3259156 A US3259156 A US 3259156A US 367120 A US367120 A US 367120A US 36712064 A US36712064 A US 36712064A US 3259156 A US3259156 A US 3259156A Authority US United States Prior art keywords carriage motor rotor bank sawmill Prior art date Legal status (The legal …
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1930 Wound Rotor Motor Mill Drives. Application of Induction Motors with Variable Frequency Drives . induction motors with variable frequency drives (VFD's) ... and wound rotor motors. 3 Motors ... Paper machines (winder, tension reels, mill stands) l Cement mills ...
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TMEIC2 installed its first AC adjustable-speed motor drive system for a rolling mill main stand in 1980; by January 2004 TMEIC had installed AC adjustable-speed motor drive systems on more than 700 main mill stands, coilers and reels, constituting more than 2,400 MW of installed main drive power. 2. TMEIC: includes equipment supplied by Toshiba
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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, …
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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 ...
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What kind of drive motor? Permanent magnet or wound rotor? Shunt/series wound or separately excited? Armature or field resistors? Shorted field resistors on a field-controlled motor will make it run at minimum output. Shorted armature resistors on a permanent magnet motor will make it run like a bat out of hell.
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A major alternative to the Kramer system for wound-rotor induction machine drives was the Scherbius system, introduced in Germany in 1907.Historical evidence indicates that pioneering Scherbius rolling mill drives were installed at the Saucon works of the Bethlehem Steel plant around the time of World War I.
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wound rotor motor and ball mill starting curve. Ball Mill Drives Mineral Processing & MetallurgySeveral types of ball mill drives can be wound rotor motor These assume no greater than a 10% voltage drop at the motor terminals V-BELT Ball Mill DRIVE -wound rotor motor and ball mill starting curve-,rotor use forget price
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In 1930 the New York City subway installed a 3,000-kW grid-controlled rectifier for traction dc motor drives. In 1931, German railways introduced mercury-arc cycloconverters (CCVs) that converted three-phase 50 Hz to single-phase 16 2/3 Hz for universal motor traction drives. Joseph Slepian of Westinghouse invented the ignitron tube in 1933. It ...
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Wound Rotor Motor Mill Drives - factjeugdnoord.nl. 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, …
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The rotor is the standard cage-type rotor with the d-c field winding brought out two (2) slip-rings on the rotor shaft. It is coupled directly to the mechanical load which it must drive. The entire stator, however, is free to rotate on trunnions, in the same manner as an a …
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The exception being small permanent magnet servo motors and some battery applications in power plants. I've worked on a couple recent log chippers that try to use multiple motors load sharing and one 3000 HP chip mill that uses a synchronous motor but in practice wound rotor motors are more reliable and simpler to troubleshoot and maintain.
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The starting torque of the squirrel-cage rotor can be increased by shaping the rotor bars. Figure 8 shows the motor characteristics of different rotor bar shapes. The change of the rotor resistance is caused by the influence of the skin effect at different slip frequencies. With increasing slip frequency, thus increasing slip, the
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MENZEL has manufactured electric motors since 1927 and has its headquarters in Berlin, Germany. Many industrial plant operators worldwide from the cement, paper, steel, or other industries trust the proven quality of MENZEL electric motors. Our product portfolio includes squirrel cage and slip ring motors as well as DC motors .
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Single and multi-speed three phase motor. AC and DC motors. Servo Motors / Drives. Generators. Wound Rotor Motors. Turbines. Submersible pumps / Pumps /Vacuum Pumps. Mill Motors. Elevator Motors/Generators and Gearless Units . Traction Motors/Traction Generators. Portable Generators and Welders. Brake Coils/Clutch Coils/Magnet Coils
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Electric Drives - AC Motors (Description and Applications) ... Wound Rotor Induction Motor. Now of historic interest only, these motors were designed to permit control of the speed - torque characteristics of the machine. They used conventional windings on the rotor which were accessible through slip rings. The rotor windings were not connected ...
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Over a Century of Dependable Mill-Duty Crane Control Simple, strong circuit design means less downtime, less routine ... originally patented by EC&M in the 1930's. This arc extinction method results in the longest tip life and minimizes arc chute ... and AC wound rotor motors • Reversing dynamic lowering control for hoist drives
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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.
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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.
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Wound Rotor Motor Mill Drives - factjeugdnoord.nl Wound Rotor Motor Mill Drives. A wrim is a type of induction motor with unique construction, in the cement
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It has been the economical workhorse for use in ac motor drive applications during the past quarter Century. It has been used for both low-performance as well as high-performance drive applications. Basically, there are two types of induction machines: the squirrel cage induction machine (SCIM) and the wound rotor induction machine (WRIM).
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February 1930 Four steel cables, each two inches in diameter, support the carrier which runs on 32 wheels. The traction rope is endless and is one inch in diameter. The electric equipment consists, princi pally of two 225-horsepower, wound-rotor, intermittent duty, hoist motors, operating mechanically and electrically in parallel, and
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Wound Rotor Motor Mill Drives Fact Jeugd Noord. 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, …
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While, the attendant demonstrator wore a Powerplus single-rotor assembly, the majority of 'blown' production cars were specified with either Cozette No.9 (4psi) or altogether rarer Zoller (5-7psi) units. Among the earlier supercharged 2-Litres built, 'GK 3466' was proudly displayed on Lagonda's stand at the 1930 Olympia Motor Show.
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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 …
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In 1930, the company already held 84 patents for Germany and 101 foreign industrial property rights. Development of NIVAROX The era of NIVAROX, a hardenable iron-chromium-nickel-beryllium alloy, also began in 1930.
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Wound rotor motor . Find your wound rotor motor easily amongst the 66 products from the leading brands (CG GE Motors ABB ) 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
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1908 BTH displayed a 3-phase alternator driven by a Curtis turbine, a motor drive system for textile machinery and a tungsten filament lamp at the Manchester Electrical Exhibition. F. F. son had abandoned vertical turbines in favour of horizontal, and this 1000kW 3000 rpm machine was the first from BTH.
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Virtually every washing machine, dishwasher, standalone fan, record player, etc. uses some variant of a squirrel cage motor. Wound Rotor: An alternate design, called the wound rotor, is used when variable speed is required. In this case, the rotor has the same number of poles as the stator and the windings are made of wire, connected to slip ...
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Wound Rotor Motor Mill Drives Fact Jeugd Noord. 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, …
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Our GMD eliminates all mechanical components of a conventional mill drive system, such as ring-gear, pinion, gearbox, coupling, motor shaft and motor bearings: By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor.
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2. Which of the following motors is preferred when quick speed reversal is the main consideration ? (a) Squirrel cage induction motor (b) Wound rotor …
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