Menu
· 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. . We have sent the motor to our motor guy to refurbish and interconnect the rotor there any advice or similar applications out there that could be helpful ...
Get Price
Woundrotor synchronous motors can be run at even higher speeds. In rolling mill drives, often 200300% of the base speed is used. The mechanical strength of the rotor limits the maximum speed of the motor. Fig. 1: SPWM carriersine input 2level PWM output.
Get Price
Fixed speed drives, with wound rotor motors or synchronous machines, were the ... Liquid Resistor Starter (LRS) are containing agitated mechanical parts requiring... Read More. Starting of slip ring induction motor explained in an easy manner. ... where a 600kW ball mill motor is started by use of a secondary liquid. Read More. Wound Rotor ...
Get Price
Wound Rotor Induction Motor Slip Power Recovery. Large wound rotor induction motors (WRIM) have been used in some industries for decades. In the cement and mining industries, high horsepower WRIMs are used on large grinding mills, where they have the advantage of controlled starting characteristics and adjustable speed capability.
Get Price
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. Features Separate slip ring comparment at non drive end to prevent dust ingress into motor windings
Get Price
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 highinertia equipment and large loads smoothly and easily. Wound rotor motors also can develop high starting torque at standstill – while maintaining low inrush.
Get Price
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 speed for the duration of the work cycle, then the resistors will be removed from the ...
Get Price
A slip ring (wound rotor motor) has a high starting torque, compared to its counterpart, the standard induction motor, and an additional benefit is the ability to vary the speed. While that speed variation is only accurate between 50 and 100 percent of full load speed, that''s something that isn''t possible with a standard induction motor.
Get Price
Most woundrotor 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 woundrotor 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 ...
Get Price
Abstract. The speed of a synchronous motor with constant rotor excitation is determined by the stator frequency and the number of poles. As long as an efficient, variable frequency power supply was not available this meant constant speed operation at fixed frequency.
Get Price
The CSE Uniserve Rotor Drive Slip Energy Recover System (SER) is designed for speed control of wound rotor induction motors. Typical applications include mills, crushers, fans and pumps. Designed and manufactured in Europe to CSE Uniserve''s specifications, offers the ultimate in single or dual motor .
Get Price
The induction motor drive has many applications like it is used in fans, blowers, mill runout tables, cranes conveyers, traction, etc. The induction motor drive is selfstarting, or we can say when the supply is given to the motor, it starts rotating without any external supply.
Get PriceGeen motor zonder Rotor! Dit is de slogan waarmee wij ons al sinds jaar en dag op de markt profileren. Vanuit onze locatie in Eibergen, werken we met een hechte en toegewijde groep mensen, die door goede samenwerking wil voorzien in de behoeftes van onze klanten.
Get Price
These liquid starters are used in mill drives where the motors operate in parallel. ... cannot be coupled electrically due to the mechanical coupling of the grinder. ... Wound rotor motor control for demanding industrial ... machines such as; ball and SAG mills, ... The .
Get Price
Wound field synchronous motor rotor has a dc field winding, which is supplied from a dc source through sliprings and brushes. The rotor can have cylindrical or salient pole construction. Cylindrical rotor motors have higher mechanical strength and are employed in high power and high speed applications; for other applications salient pole motors are preferred due to lower cost.
Get Price
rotor windings and the external rotor resistors [6]. SER is an alternative approach to induction motor speed control. Modern SER drives consist of backtoback 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
Get PriceMCW were asked to produce a control system for 75kW slip ring fed, wound rotor induction motor that was being used to drive a steel rolling mill via a Radicon gearbox. At the heart of the system MCW used the Fairford Synergy intelligent soft starter to provide a controlled soft start and soft stop for the motor.
Get Price
Most woundrotor 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 woundrotor 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 ...
Get Price
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 (cycloconverter) is typically used because gearboxes and pinion gears reach their present limit in size.
Get Price
· Slip Energy Recovery of an Induction Motor Slip Energy Recovery is one of the methods of controlling the speed of an Induction motor. This method is also known as Static Scherbius the rotor resistance control method, the slip power in the rotor circuit is wasted as I 2 R losses during the lowspeed operation. The efficiency is also reduced.
Get Price
Slurry Pump Drives; Conveyor Drives; Examples of completed projects include:Windimurra Vanadium Mine Project: Windimurra Vandium Mine Application: Ball Mill Equipment: 1 x 5500kW 6 Pole 11000 volt Wound Rotor Induction Motor Location: Mount Magnet, Western Australia Kalgoorlie Consolidated Gold Mine Application: Ball Mill
Get PriceWound rotor induction motors provide an excellent starting torque for high inertia loads and have low starting current compared to a squirrel cage induction motor. The wound rotor motor and its adjustable torquespeed characteristics are ideal for driving large ball mills, large presses, variable speed pumps, cranes, hoists, and other high inertial loads.
Get Price
For the raw and cement ballmill twin drives slipring or other wound type rotor motors are used all over the world. Ganz – first in the world – successfully broke this tradition with double squirrel cage motors supplied to DunaDráva Cement Company at Beremend. This new solution is significantly cheaper also from
Get Price
AC wound rotor drives are probably the best choice for super shredders, but DC Drives are a costeffective alternative for systems of 5000 hp and below. Joseph Crosetto The author is is a Sales Engineer for Quad Plus, Inc. Quad Plus, Inc. is an engineering and system integration company specializing in DC Shredder Drives and Automation.
Get Price
الصفحة الرئيسية
معلومات عنا
اتصل
دردشة على الإنترنت
الخط الساخن للمبيعات