0.2 kW to 90 kWConstant torque variable speed characteristic

HIGH PERFORMANCE WITH RELIABILITY

SIMPLE INSTALLATION

SIMPLE RUGGED CONSTRUCTION

POWERMAGE C D R I V E S

"POWERMAG" consists of a totally enclosed, fan cooled (TEFC), flange type

three-phase squirrel cage induction motor is mounted on to an eddy current

clutch, having a projected, self-ventilated common frame design. There is no

physical contact between motor and clutch. This results in smooth response,

there by eliminating shock loading and extending equipment life.

"POWERMAG" eddy current variable speed drive operates on AC power supply

and provides constant torque at variable speeds over a wide range.

"POWERMAG" eddy current variable speed drives are economical and widely

used for various Industrial applications.

15 kW to 90 kW Integral Design

In this design, POWERMAG is offered as an independent eddy current

coupling with input and output shafts. The input can be driven from a

standard foot-mounted induction motor suitably arranged on a common

bed-plate. This is a versatile design in which the motor can be mounted

in-line, alongside or on top of "POWERMAG" coupling.

MODULAR DESIGN

0.2 kW to 11 kW Integral Design

The primary elements of POWERMAG eddy current variable speed drive are an AC motor, an eddy current clutch, a tacho generator and

a seperate small solid-state electronic controller. The eddy current clutch consists of two rotating members : a drum driven at constant

speed by the AC motor and within the drum, a rotor / output shaft which connected to the load. Torque is transmitted from the drum to

the rotor / shaft through an adjustable magnetic field that attracts the two members. The magnetic field is produced by a clutch coil

typically below 2% of the total drive power requirements which

means smaller and longer - life controller circuits can be used.

All POWERMAG eddy current variable speed drives have an integral tacho generator mounted around the output shaft, to give voltage

and frequency proportional to speed, which is used for speed reference feed back signal to the controller and maintains the output

speed within 2% for the load changes from 90% to 10%. It can also be used for speed indication.

Drum Pole (Inductor)

Direction of Eddy Currents---- Flux

Eddy current generation in Drum

Standard type POWERMAG footmounted self-ventilated

aircooled eddy current variable speed drives may be

furnished with

Modular design

Flange mounted

Fin-cooled, Water-cooled enclosures

Built in electromagnetic brake

Built in eddy current brake

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MODIFICATIONS

CROSS SECTION OF POWERMAG EC DRIVE

AC MotorTorque Tube

Polewheel AssemblyCoil

Tachogenerator

POWERMAG EC DRIVE

FLOOR MOUNTED

TACHOINDICATOR

SCR OUTPUTSTAGE

SPEED ERRORSENSING

Reference of desiredspeed by potentiometeror automatic signal

FeedbackSignalof actualSpeed

MOUNTING POSITIONS

ROOF MOUNTEDWALL MOUNTED(Shaft Horizontal)

WALL MOUNTED (Shaft Vertical, facing downwards)

WALL MOUNTED (Shaft Vertical, facing upwards)

Totally enclosed Fin-cooled Design

POWERMAG EC Drive can be mounted in any of the above shown methods without affecting the performance of operations.

TYPICAL TORQUE SPEED CURVE

ELECTRONIC CONTROLLER

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Constructed on a single printed circuit board 220/240 volt AC supply

Compatible with computer and transducer signals

Wide speed range with excellent speed holding

Remote control options with no distance limit

Factory preset controls for easy installation

Built-in adjustable dynamic controls, acceleration / deceleration and torque limit

Minimum downtime - controller can be changed in seconds

Many special systems and control options

SPECIFICATIONS

Input Power : 240 V AC; 15%, 1

Output Power : 85V DC, 5.0 A

Speed Holding : 2%

Standard Features : Soft Start 0-90 Sec., Operator Controls & Maximum Torque Limit

Protective Features : Input fuses, low line voltage, line transients & isolated signal circuitsOAmbient : 50 C

Construction : Wall / Panel Mounting

POWERMAG EC drives are economical and widely used for various industrial applications : Cement, Rubber, Chemical,

Plastic, Paper, Wire drawing, Mining, Thermal power plants, Blowers, Extruders, Kilns, Material Handling, Pumps, Screw

Feeders, Conveyors, Sugar, Tea, Tobacco etc.,

POWERMAG is an simple drive, easily installed and maintained, longlife, with no routine maintenance.

APPLICATIONS

5%

0 120

100%

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Speed (rpm)1200 1500

(+)

Characterisitics with feed-back control

Continuous rating

Characterisitics without feed-back control

Dead Zone of speed control

DRIVES RATINGS IN kW

PARAMETERS 0.2 to 11 15 to 55 90 55 to 110

COOLING AIR COOLED - SELF VENTILATED WATER COOLED

COIL VOLTS (Max.) 85 V DC 85 V DC 180V DC 180V DC

COIL VOLTS (Nom) Rated 55V DC 55V DC 110V DC 110V DC

COIL CURRENT (Nom) Rated 2.5A DC 5.0A DC 2.5A DC 5.0A DC

TACHO VOLTS 30V AC rms, 500mA @ 1500rpm (Nom)

TACHO FREQUENCY 600 Hz (Near Sine) @ 1500 rpm

PROTECTION IP - 21 IP - 54

INSULATION CLASS F

TEMPERATURE RISE LIMITED to CLASS B

AMBIENT O50 C

ALTITUDE UPTO 1000 Mts. above sea level

FEATURES BENEFITS

Torque is transmitted by a magnetic field without friction or wear providing longer life Less down time

Tachogenerator feedback maintains the output speed within 2% for load changes from 90% to 10%

Controls speed accurately

Approximately 200% motor torque available at clutch output

Accelerates high inertia loads quickly and handles intermittent overloads without having to increase the horsepower rating.

Rugged AC motor is the main drive member.Permanently lubricated bearings

No routine maintenance

Fewer wearing parts - all POWERMAG drives have only four bearings

H i g h r e l i a b i l i t y a n d l o w m a i n t e n a n c e . M in imum down-time and maximum production from initial start-up reduce annual operating costs and accumulate savings over protracted years of service.

Simple design - drive consists of a clutch, AC induction motor and small solid state controller

Easy to understand, install, operate and maintain

Stationery field design - eliminates all weak links like commutators, slipring or brushes Enhancing life expectancy

All rotating members are dynamically balanced Extremely low vibration and long bearing life

Motor starts off Load Reduce mains peak demands

Constant cooling over whole speed Eliminates external cooling fans

Wide speed range at constant torque Accurate rpm control throughout the speed range of 10:1 for continuous operation and 20:1 for short operation at full load 100% rated torque

ELECTRICAL SPECIFICATIONS

SF No. 532, Nehru Nagar, Maniyakaranpalayam,Ganapathy, Coimbatore - 641 006, India. Tel : 91-422-2532013, 2537990, Fax : 91-422-2537988 E-mail : powermag@vsnl.com URL : www.powermagindia.com

POWERMAG CONTROL SYSTEMS (P) LTD.

POWERMAG continuing investment in high quality production,

inspection, testing and customer service ensures that POWERMAG will

continue to be leader in drives industry well into the future. State of art

of componentry, design and engineering combine to redefine eddy

current variable speed drive performance and sets new standards in

maintenance free, ruggedness and flexibility.

All drives are manufactured in-house in a carefully controlled, multistep

process. Design standards keep projects focussed and regular design

reviews monitor progress. For special applications, field trials are

regular occurrence to ensure functionality in the user environment.

Selected customer requirements are targeted for development of

system and trial to prototype units and their testing is used to fine tune

designs before further production takes place.

In this way, all of POWERMAG products are direct response to user

requirements. Monitoring of POWERMAG drive is continuous. Problems

and additional feature requirement are studied to attain the maximum

value for users in industry.

POWERMAG CONTROL SYSTEMS (P) LTD., was established in 1991 by a team

of qualified engineers. POWERMAG has designed and manufactured a steady

stream of eddy current variable speed drives and controls from 0.2 kW to 90 kW

ratings. These products are found in various types of industries in India and

abroad, handling the demands of most of the industrials application

LEADERS IN EDDY CURRENT VARIABLE SPEED DRIVES....

Customer support-providing control across...

.....Via network of POWERMAG offices and distributors, which provide service and

customer support. POWERMAG valuable customers includes renowned companies

like Ballarpur Industries, Continental Coffee, CVL, EID Parry, Grasim Industries,

Hindustan Latex, Hindustan Lever, Indian Railways, MAC Group of Companies, M.L.

& Co, Seshasayee Papers, TAC, W.S. Industries, ISGEC, Gujarat Ambuja, RNPL,

SSNL, Greaves, Government & Private Sector Sugar & Tea Factories etc.,

POWERMAG key design criteria includes reliability, serviceability, flexibility,

performance and ease of installation assure the customer of a world class product

which can compete with any on the market today.

SAVE NATURE

SAVE THE WORLD

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