Electron
S.R.L.
Design Production & Trading of Educational Equipment
A4 - BASIC ELECTRICAL MACHINES TRAINING SYSTEM
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
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File LEAFLET A4
ELECTRICAL MACHINES TECHNOLOGY MODULE GENERAL DESIGN CONSIDERATIONS The common objective guiding the design of this equipment is the development of tools that are the core of training programs about the latest manufacturing and service technologies and techniques. In following these programs the students acquire theoretical knowledge and practical experience on machines that are basically of an industrial type, but so arranged as to provide maximum learning profitability to them. Also great attention has been given to the human interface to provide a system that is safe, user friendly, easy to understand, continuously updated and tuned to the actual industrial, real life world. Some of the design features that provide our equipment with an outstanding training value are described below.
CONSTRUCTION The ELECTRICAL MACHINES TRAINER provides a complete range of integrated teaching equipment for the various subjects of both AC and DC machines. All equipment is implemented in rugged enclosures. The modules can be optionally mounted on an alluminium frame, when being exercised or when stored, and can be used both for individual or for group demonstration purposes.
The machines within the same power range are fully compatible among them, both mechanically and electrically. They can be easily and quickly assembled on a test board that ensures safe coupling and noiseless, smooth and vibration free running. Educational boards with 4 mm safety terminals and printed electrical diagrams are mounted on each machine. Half-coupling joints are provided with shock absorbers and rotating parts are covered with protection guards. Different types of brakes and dynamometers are available for controlling and measuring the loads of the motors under test. Torque measuring is bi-directional by means of a mechanical levelling system or a thin film strain gauge load cell. Speed and torque readings are normally digital. However, analog, or analog-digital instruments are available on request. A computerized electrical machine test system is available to read and process the parameters of machines under test. By entering data manually the tests can be simulated. Brakes are sized for a breaking power greater than the overload power of the motors. Power range of the machines, and therefore power requirements, can vary from the S series (fractional Horse Power), to the M series (approximately 1 KW) and the L series (up to 5 Kw). For the operation of a typical experimental group, a bench with a working area of 2000 x 700 mm is required.
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
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File LEAFLET A4
EXPERIMENTAL GROUPS
TEACHING TEACHING LEVEL
Several different experimental groups can be selected by the user, each group using the same power supply, loads and control/accessory modules. The attached selection matrix may be used to identify the essential and the recommended items required to provide complete experimental components for each type of machine. Each electrical machine test bench is normally intended for 3 to 4 students groups, but can be easily handled by two. The system requires a three-phase supply, 5 wire, 220/380 V, 50 Hz (or according to local voltages).
The flexible and modular design enables to select a wide range of electrical machines test methods, varying in complexity from simple motor load test up to fully automated PC based measurement and control system. Therefore the teaching level can vary from the technician level up to graduate level and researcher.
SAFETY Our power supply is provided with built-in differential, earth leakage and magnetothermal protections that ensure a safe operation and protection of the equipment against damages caused by incorrect use. An over-speed protection is available on request. Electrical connections are performed via 4 mm safety cables and terminals. Use of our set of cables is recommended
FLEXIBILITY AND COMPATIBILITY The instruments provided are electrically compatible with the various machines of the range. Load modules can be connected in series, parallel, delta and star with no limitation, and are suitable for testing generators and transformers even in overload conditions
EXPANSIONS AND INTERFACING The electrical machines test systems can be integrated with our power electronic drivers for open or closed loop speed control of DC motors and variable speed control of AC motors. Included are computer interfaces for real time monitoring and control techniques under varying load conditions
ORIGIN Our electrical machines and accessories are manufactured in Italy.
COURSEWARE An experiment manual is provided which contains, for each experiment, a theoretical review, circuit diagrams, experiment execution procedure in a step by step approach and worksheets for tabling and graphing the experiment results. Some of the typical experiments covered are listed below (others can be designed by the user as necessary).
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
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File LEAFLET A4
SINGLE AND THREE PHASE TRANSFORMERS MEASUREMENT OF WINDING RESISTANCE MEASUREMENT OF TRANSFORMATION RATIO NO LOAD TEST SHORT CIRCUIT TEST AC ASYNCHRONOUS MACHINES MEASUREMENT OF WINDING RESISTANCE MEASUREMENT OF SLIP RING MOTOR TRANSFORMATION RATIO NO LOAD TEST SHORT CIRCUIT TEST DETERMINATION OF WORKING CHARACTERISTICS AC SYNCHRONOUS MACHINES MEASUREMENT OF WINDING RESISTANCE NO LOAD TEST SHORT CIRCUIT TEST DETERMINATION OF WORKING CHARACTERISTICS DC MACHINES MEASUREMENT OF WINDING RESISTANCE MAGNETIC CHARACTERISTIC NO LOAD TEST DETERMINATION OF WORKING CHARACTERISTICS
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
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File LEAFLET A4
COMPUTER BASED SYSTEM
SYSTEM SELECTION
In alternative to the manual test system, the above experiments can be executed with a computer based system. In this case the electrical machines are connected to a data acquisition box that communicates with a personal computer. The parameters of the tests are read directly into the computer where they are processed for presentation in tables and graphs. The experiments can also be simulated by entering data manually through the PC keyboard. Four software programs are available for testing Transformers, AC Asynchronous Machines, AC Synchronous Machines and DC Machines respectively
To better clarify the use of the Components Selection Table shown below, we propose an example of how a complete list of the required equipment can be produced. 1. Course content First of all the course subjects must be defined: in or example it is assumed that the course will cover three and single phase transformers, three phase motors and generators, single phase motors, DC motors and generators. 2. Number of students and stations Then, the number of students: the laboratory of our example will include 24 students, 3 per test station, therefore 8 stations will be required. 3. Parallel work or rotation A compromise must be reached between simultaneous operation on 8 identical stations (which can simplify the laboratory supervision but requires equipment duplication), and student rotation (which reduces the equipment need but requires careful planning). It is decided to provide the following 8 test stations and one instrument bench
ADVANTAGES The following are the distinct advantages of the ELECTRON test systems: Any machine can be coupled with any other. Due to the unique ELECTRON motor fastening system, the position of the machine shaft on the three axes (X, Y and Z) can be easily and precisely adjusted. By means of a simple kit of accessories it is possible to mechanically couple any machines of the same power range, expand the laboratory possibilities and rationalise the set of equipment to avoid any unwanted duplication. All units are designed to perfectly integrate each other. For example, the power supply is suitable for the educational machines, for the motor and transformer kits and for the motor assembling system; the electrical machines are fully compatible with the power electronics trainer of the electronics section
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
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File LEAFLET A4
TEST STATIONS Test stations N째 1 and 2 - Single and 3phase transformers Composed by 2 sets of : Single phase transformer Three phase transformer Power supply Resistive Load Power measuring module Set of cables Working bench Panel support and 1 set of: Capacitive load Inductive load Test stations N째 3 and 4 - Single and three phase motors Composed by 2 sets of: Squirrel cage motor Power supply Coupling base Eddy current brake Tachometer Power measuring module Set of cables Working bench Panel support and 1 set of: Synchronous machine 2 speed motor Capacitor motor Starting rheostat Excitation rheostat Load cell Star-delta starter Two speed starter Speed control trainer Test stations N째 5 and 6 - Three phase generators Composed by 2 sets of : Synchronous machine Power supply Coupling base DC driving motor Resistive load Tachometer Power measuring module Set of cables Working bench
Panel support and 1 set of: Starting rheostat Excitation rheostat Inductive load Capacitive load Paralleling board Test stations N째 7 and 8 - DC motors and generators Composed by 2 sets of : DC machine compound excitation DC machine series excitation Power supply Coupling base DC machine shunt excitation in brake version Resistive load Tachometer Working bench Set of cables Panel support and 1 set of: Torque measuring by load cell Starting rheostat Excitation rheostat Speed control trainer Power electronics trainer Instrument Bench - Automatic test system Composed by one set of : Measuring instruments with serial interface PC and related Software Data acquisition box Working bench Note: Machines and other accessories for this test bench are obtained from the above 8 stations.
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
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File LEAFLET A4
ELECTRICAL MACHINES TECHNOLOGY COMPONENTS SELECTION TABLE
Description
Code
Q.ty
Essential/ Recomm.
(for 24 Students) min/max
Purpose
POWER SUPPLIES Universal Power Supply
A0240
E/R
Single Phase
A4110
E/R
Three Phase
A4120
E/R
Squirrel Cage Motor
A4220
E/R
Slip Ring Motor
A4222
E/R
Synchronous Machine
A4223
E/R
Two Speed Motor
A4224
E/R
A4223
E/R
Provides variable AC and DC supplies for powering AC and DC machines; extensive protections are included against misuse
6/8
TRANSFORMERS For Lab experiences and single phase voltage step-up/down For Lab experiences and three phase voltage step-up/down
6/8 6/8
THREE PHASE MOTORS For Lab experiences and as a driver for AC and DC generators and for studying different starting methods For Lab experiences, as a driver for AC and DC generators and as voltage phase shifter for studying rotating magnetic fields For Lab experiences, as AC generator and synchronous motor For Lab experiences , as a driver and for studying motor speed controls
6/8 6/8 6/8 6/8
THREE PHASE GENERATORS Synchronous Machine
For Lab experiences, as AC generator and synchronous motor
3/4 (*)
SINGLE PHASE MOTORS Capacitor Run Motor
A4230
E/R
Capacitor Start Motor
A4232
E/R
Universal Motor
A4234
E/R
For Lab experiences, as a driver motor and for studying single phase motors starting methods and ways of producing rotating magnetic fields For Lab experiences, as a driver motor and for studying single phase motors starting methods and ways of producing rotating magnetic fields For Lab experiences, as a driver motor, repulsion motor and for studying effects of magnetic fields
(*) See also Three Phase Motors Section
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
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File LEAFLET A4
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Description Description
Code
Q.ty
Essential/ Recomm.
(for 24 Students) min/max
Purpose
DC MACHINES Compound Excitation
A4240
E/R
For Lab experiences, as driver DC motor and DC generator
4/6
Series Excitation
A4242
E/R
For Lab experiences and DC driver motor
4/6
Shunt Excitation
A4244
E/R
For Lab experiences, as driver DC motor and DC generator
4/6
ASSEMBLING KITS Motor Assembling Kit
A3110
E/R
Transformer Assembling kit
A3120
E/R
For studying motor construction details to integrate the theory; the motor can subsequently be used for any Lab requirement For studying transformer construction details to integrate the theory; the transformer can subsequently be used for any Lab requirement
3/4
3/4
UNIVERSAL MACHINE
A4300
E/R
Flexible and comprehensive system for a great variety of Lab requirements: most rotating electrical machines can be assembled and coupled by means of a set of modular components (stators, rotors, coupling accessories and base)
A4840
E/R
For coupling two machines on a base by fastening and aligning them with a quick method that does not require tools
6/8
Eddy Current Brake
A4420
E/R
Provides a load for testing motors
1/2
Braking DC Generator
A4430
E/R
Provides a means for loading motors and measuring torque
6/8
Resistive Load
A4510
E/R
Resistive load for testing AC and DC generators
6/8
Capacitive Load
A4520
E/R
Capacitive load for testing AC generators
4/6
Inductive Load
A4530
E/R
Inductive load for testing AC generators
4/6
Starter for DC Motors
A4610
E/R
Rheostat for starting DC motors
6/8
Starter for AC Motors
A4620
E/R
Rheostat for starting 3 phase AC motors
6/8
Excitation Rheostat
A4630
E/R
Rheostat for controlling excitation in DC and synchronous AC machines
6/8
Universal Machine
2/4
COUPLING BASE Coupling Base BRAKES
LOADS
RHEOSTATS
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
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File LEAFLET A4
Description
Code
Q.ty
Essential/ Recomm.
(for 24 Students) min/max
Purpose
METERS Tachometer
A4720
E/R
Digital RPM meter
6/8
Transducer for A4720
A4721
E/R
Sensor that provides input to the tachometer
6/8
Torque Meter
A4730
E/R
Transducer for A4730
A4731
E/R
Electrical Power Measuring Module
A4750
E/R
Computer Base System
A4780
R
Paralleling Board
A4810
R
STAR-DELTA Starter
A4820
E/R
Two Speed Commutator
A4830
E/R
Cable Set
A4890
E/R
B3600
E/R
B3610
E/R
B3620
E/R
For measuring torque with the braking DC generator A4430 Sensor that provides input to the torque meter For measuring all DC and AC parameters in the electrical Lab A Personal Computer reads the electrical test data through a data acquisition box and presents processed results to the operator; suitable also for simulating tests without connecting the machines
6/8 6/8 6/8
1
ACCESSORIES For connecting in parallel two or more AC generators or generators and power line For starting AC motor in a STAR configuration and then switching to DELTA To start the 4-2 poles motor A4224 on 4 poles and then switching to 2 poles for double speed For connecting all machines and instruments; 4 mm safety terminals and coloured leads ensure a safe use
1/2 1/2 1/2 6/8
DRIVERS Power Electronics Trainer Speed Control for DC Motors Speed Control for AC motors
NOTES
For study of the power electronics used to drive electric motors For experiences on controlling DC motor speed For experiences on controlling AC motor speed
Code:
Model Code - For power range consult the ELECTRON Catalogue; power of machines, accessories and loads should be matched
E/R:
Essential/Recommended component. Essential components are required to perform the basic experiments. Recommended components provide additional and higher level training capabilities
Q.ty:
Essential/Recommended quantities for an effective and comprehensive training system. The quantities are for a 24 students laboratory.
ELECTRON S.R.L. VIA CASCINA TORCHIO I-26833 MERLINO (LO) ITALY - TEL. 39(Italy) 02(Milan) 9065 9200 FAX 9065 9180 - E-mail: electron@electron.it Web: www.electron.it Rev 11/00 Specifications may change without notice
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File LEAFLET A4
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