Electrical Engineering Division

Open Electrical Machine Lab - AUTOMATIC CONFIGURATION

THIS SYSTEM IS A COMPLETE SET OF COMPONENTS AND MODULES SUITABLE FOR ASSEMBLING THE

ROTATING ELECTRIC MACHINES, BOTH FOR DIRECT CURRENT AND FOR ALTERNATING CURRENT.

STUDENTS CAN PERFORM A CRITICAL AND WELL ANALYZED ASSEMBLY, IN ORDER TO UNDERSTAND THE

PRODUCTION TECHNIQUES BEFORE PERFORMING PRACTICAL TESTS OF THE OPERATING CHARACTERISTICS.

THE SYSTEM IS SUPPLIED AT LOW VOLTAGES IN ORDER TO PREVENT THE RISK OF ACCIDENTS.

 

HOWEVER, THE MACHINES HAVE FULLY INDUSTRIAL FEATURES.

The OPENLAB system, in its automatic configuration, is composed of:

• A set of components DL 10280

• Motor driven AC/DC power supply DL 10017

• Mechanical power measurement module DL 10050N

• A load cell 100 N DL 2006D

• Electrical power measurement module DL 10065N (2)

• Motor driven resistive load unit DL 10045

• An adapter bracket DL 10284

• A pole changing module DL 10185

• A locking and rotating device DL 10285

• A parallel board DL 10310

• Electromagnetic brake DL 10300A

• Star/Delta starter DL 10116

• Starting and synchronization DL 10125

• Motor driven power supply for brake DL 10306

• Data acquisition and processing software for electric machines DL 8330SW

• Computerized data acquisition system via USB DL 1893

 

• Power supply module

It includes the following components:

1. Base plate

2. Supports with bearing

3. Coupling joints

4. Flexible coupling

5. Electronic speed transducer

6. Assembling screws

7. Wrenches

8. DC stator

9. AC stator

10. Rotor with commutator

11. Brush holder with 2 brushes

12. Cage rotor

13. Ring rotor

14. Brush holder with 6 brushes

Besides, a magnetic probe is foreseen to display the magnetic fields and a transparent covering, for safety

 

reasons, prevents students from the accidental contact with the rotating parts.

Open Electrical machine Lab The system is a component kit that should allow to assemble the rotating electrical machines, both for AC/DC, leaving the student the possibility of a personal critical realization with the purpose of a real knowledge of the various constructive techniques.  

Whole unit should to assembled & disassembled very easily:

• Baseplate
• Four removable bearing housing
• Coupling
• Elastic buffer
• Optical speed transducer
• Clamping screws
• keys
• DC stator with salient poles
• AC stator with three-phase winding
• Commutator rotor
• Brush holder with two brushes
• Squirrel cage rotor
• Slip-ring rotor

 

It must be possible the realization of the following experiments :

• Main poles
• Interpoles
• Main magnetic field
• Intensity of the magnetic field
• Induced voltage
• Interpole effect
• No-load magnetic neutral axis
• Rotating magnetic field
• Three-phase rotating field
• Single-phase rotating field

 

It is also possible to perform tests and measurements on the electric machines of the OPENLAB system through a data acquisition and processing system composed of a dedicated software in LabView environment, an interface to PC and a set of suitable motor driven modules for the control of the parameter and interfaceable modules for the acquisition of data. The following table shows the changes in modules that is necessary to make to the system in order to obtain a fully automatic data acquisition and processing system with the OPENLAB components. All the substituting modules come from the Microlab electric

Product description

ts1800 measures the capacitance and dielectric loss factor (tgδ) of high voltage electric equipment.  it is integrated structure, built-in dielectric loss test bridge, variable frequency adjustable power supply, boosting transformer and sf6 standard capacitor.

 

high voltage source is generated by internal inverter of the instrument, which is used for testing test object after transformer boost.  if adding a insulation cup and temperature control device, dielectric loss of insulating oil can be tested.

 

 

features

• touch lcd screen display.
• calendar chip and large storage inside.  save testing result according to time order, check history record and print the result.
• the instrument data can be exported through u disk, and can be used to view and manage the data through the software on pc.
• multiple testing mode, with modes of inside high voltage, outside high voltage, inner standard, external standard, gst/ust, self-excitation.  high voltage(more than 10kv) dielectric loss test can be made in the situation of external standard outside high voltage.
• test full sealed cvt (capacitive voltage transformer) c₁ and c₂ dielectric loss and capacitance at the same time.  also test cvt transformation ratio and voltage angle difference.
• the dielectric loss and capacitance value of c0 in the upper end of cvt can be measured by using the reverse shielding method.
• high speed sampling signal.  inverter and sampling circuit inside are digitized controlled.  output voltage is adjusted continuously.
• lcr automatic measurement. Inductance, capacitance, resistance can be measured and displayed.
• multiple protection of input voltage fluctuation, output short circuit, over-voltage, over-current, temperature, secure and reliable.  meanwhile, it has the function of grounding testing, that voltage boost is not permitted for non-grounding equipment.
• no need to dismantle hv lead to measure dielectric loss and capacitance of cvt.
• frequency can be changed into 50hz, 47. 5hz/52. 5hz, 45hz/55hz, 60hz, 57. 5hz/62. 5hz, 55hz/65hz.

This laboratory has been designed to introduce the fundamentals of Modern Electrical Machine Lab. The main functions of processes, controllers and controlled systems are shown on a simulated controlled system, as well as the interactions between the transfer elements of a control loop.

Salient FeaturesA complete elaborative setup for synchronous Machines:
1. To estimate the voltage regulation of an alternator by Synchronous Impedance Method.2. To determine voltage regulation of an alternator using ZPF Method3. To determine OCC and SCC of an alternator and to draw its equivalent circuitPower Circuit
• Input 230 V AC• Full bridge SCR based 220V / 10 Amp output• Supports signal conditioning circuit for smooth supply for machine.• System furnishes its DC Requirement inbuilt so as no external DC is required

Technical specifications:

System is divided in three sectionsControlling and Measuring SectionControlling Section consist of Duly markedterminals on a duly engraved insulatedpress board with all accessories asmentioned

This laboratory is focused on the topic of the generation, the distribution and the utilization of the electrical energy, used for both industry and domestic applications.
The trainer is composed of a set of modules for the simulation of the various subsystems forming a complete electrical power system, from power generation to energy utilization.

Salient Features

A complete elaborative setup

to:

1. Perform No-load test and

Blocked rotor test on a

three-phase Induction

Motor and to derive its

equivalent.

2. Determination of the

performance characteristics

of a three-phase induction

motor by Load test.

3. Vary the speed of three

phase induction motor by

varying voltage and change

the direction of rotation

Power Circuit

??? Input: 3-phase AC, 415 V

±10%, 50Hz

Our electrical machine trainer is a novel effort to make the long prevailing screwdriver technology of educating students, a thing of the past.

By way of this trainer that comes with 2 stators & 2 rotors students and teachers are capacitated to assemble and operate all types of A.C. & D.C. MOTORS effortlessly enabling them to unravel the various intricacies of electrical machine technology.

This trainer is indispensable in so far as it gives the forthcoming generation of engineering experts a chance to view their theoretical concepts perfectly synchronize with the practical know how of assembling & dismantling machines.

More so, the trainer brings to them 54 assembly experiments to familiarize them with the construction, operation and manipulation of all motors dominating every facet of our modern times.

It would not therefore be an exaggeration to state that the trainer is nothing but a manifestation of their very own technical ideas.

The novelty and authenticity of our research has received due certification from SHRI S.K.BHATTACHARYA, Head of Electrical Dept, TECHNICAL TEACHER'S TRAINING INSTITUTE, CHANDIGARH under ministry of HUMAN RESOURCE DEVELOPMENT.

The Opera Simulation Software Suite is a powerful interactive Finite Element Analysis (FEA) software package proven to provide accurate electromagnetic field modelling for all types of machines, including axial flux topologies and linear motion devices. Electromagnetic and other physics solvers, that provide different levels of analysis complexity, are available to offer users the best tools for their requirements. Comprehensive material modelling options (including magnetization, demagnetization in service and full vector hysteresis material model) as well as easy definition of external drive circuits are all geared towards facilitating machines design. The integrated Optimizer provides an efficient route from concept to competitive product. The Machines Environments (ME) is an easy to use, template-driven development tool specifically designed for electrical machines engineers.

Opera-2d offers functionality for designing most radial flux machines in two dimensions, by using the assumption that for the majority of the length of the machine a Cartesian (XY) cross-sectional analysis accurately defines the behaviour.

Opera-3d supplies three dimensional modelling, essential when:

• the length of the machine is short compared to the radius
• the rotor and stator lengths are substantially different and this cannot be adequately compensated for by changes in material properties
• axial flux paths exist that significantly affect the performance
• more accurate representations of the end windings/induced current return paths are needed

Depending on the geometrical complexity and symmetry, users have the option of using either Opera-2d or Opera-3d. Statics, Steady-state and Transient with motion Opera’s Static solver provides an accurate representation of the electromagnetic behaviour of the machine. This is useful for certain types of machines where the fields can be considered as ‘frozen’ in time (as in the case of DC machines) or travelling at the same speed as the rotor (Synchronous Machines), Users can deploy the Steady-state (timevarying AC) solvers for machine analyses that include time varying fields, for example the induction machine or torque vs. slip characterisation.

By using the Transient with motion solvers, users can analyse completely the real-world performance of any machine. This also includes analysis of the effects of mechanical coupling. Losses Opera’s range of solvers allow users to evaluate Iron losses (including eddy current, hysteresis and excess/rotational components) for any type of machine. This can be done using Fourier methods with losses described by Steinmetz based formulations or directly from manufacturers curves. Users can calculate copper losses simply from the current flowing in simulated windings. Opera’s hysteresis solver gives users the ability to obtain explicit hysteresis losses (including rotational component losses and eddy current losses) by explicitly defining the materials’ conductivities. Any loss quantity can be used as a heat source in 2D or 3D? thermal analyses.

• Minimum Order Quantity: 01 Unit

The following portable type laboratory module designed to study the working principal of power system lab equipments. (Both static and Electro mechanical)

• Microcontroller based IDMT/DMT type over current relay study trainer.
• Electro mechanical over current relay study trainer (IDMT/)
• Microcontroller based over/under voltage realy study trainer (IDMT/DMT).
• Electro mechanical type over voltage relay study trainer (DMT/IDMT).
• Electro mechanical type under voltage relay study trainer (/IDMT).
• Microcontroller based over/under frequency relay study trainer.
• Microcontroller based earth fault relay study trainer.
• High voltage at transmission line analysis.
• FACTS Study trainer.
• Bucholtz relay study trainer.
• AC transmission line analyser.
• DC Network analyser.
• Electro mechanical type 

Advanced Power Electronics & Drive lab

Product Description 

The machine TS-50L can effectively remove moisture, gas and impurities in the insulating oil, improve the pressure resistance of the oil and the quality of the oil, to ensure the safe operation of the power equipment. It is mainly used in the power sector and industrial and mining enterprises to deal with unqualified transformer oil, transformer oil, switch oil and so on.

 

Features

• Small size and high efficiency, easy to move. It is especially suitable for live working on site. It also can dry the moisture of power equipment, and conveniently vacuum the power equipment.
• Infrared liquid level automatic control device, system pressure automatic protection device and high-efficiency degassing components are adopted in the structure. The operation is convenient and safe.

 

 

Specifications 

• Capacity: 50L/min. 
• When the vacuum pump is working, pay attention to the oil condition indicated by the oil mark (the oil should be on the oil mark line). When the water is much in the vacuum pump oil, the oil should be replaced in time.
• When operation, if there is more water in the cooler, it should be released in time.
• Always pay attention to the change of pressure gauge value. When the pressure is >0.3Mpa, the filter should be cleaned, or the filter element replaced.
• The filter screen of the primary filter, the secondary filter and the fine filter should be removed and cleaned frequently, and kept clean to avoid blockage, that resulting in insufficient oil or excessive pressure.
• During operation, pay attention to whether the running noise of the pump and the corresponding motor is normal. If abnormal, it should be eliminated immediately.
• When the machine is not in use, the residual oil in the oil machine should be put out for use.

PLECS® tools can be applied to many disciplines of power electronics engineering. Conceived with a top-down approach in mind, PLECS facilitates the modeling and simulation of complete systems, including power sources, power converters, and loads.

Included with PLECS is a comprehensive component library, which covers the electrical, as well as the magnetic, thermal, and mechanical aspects of power conversion systems and their controls. Power electronics circuits are captured with a schematic editor in a way that is familiar and intuitive for electrical engineers. Typical power electronics components such as semiconductors, inductors and capacitors are placed on the circuit diagram and simply connected by drawing wires.

Control and instrumentation systems are at the very heart of the technology-based world in which we live. The functions that they perform are crucial to the operation of products found in all aspects of everyday life. The automobiles we drive, the domestic appliances in our homes and the automated machines in the workplace – all involve the use of control and instrumentation systems.Technosys range of control and instrumentation training systems effectively address the need to teach students the complexities of control and instrumentation technology.

• Computer Based Analog & Digital Motor Control Teaching Systems
• DC Servo motor control system & PID Controller
• DC Motor Position Control System.
• DSP Based DC Servo motor position control system.
• MATLAB Based Control Systems Trainer
• Controller for Linear Induction Motor & Inverted Pendulum.
• Digital Control System.
• Digital Simulation of Linear Systems.
• Temperture Control Systems.
• Relay Control Systems.

The branch of electronics, which deals with the control of power at supply frequency (50 Hz or 60 Hz), is known as power electronics and it is one of the contemporary subjects of electrical engineering that has seen many advancements in recent times and has affected human life in almost all spheres. It is a hybrid of power engineering, analogue electronics, semiconductor devices and control systems. One major field of semiconductor devices has been to control large blocks of power flow in a system that has led to the development of power electronics. Such devices act as controlled switches and can perform the duties of controlled rectification, inversion and regulation of power in a load and the most important switching devices are thyristors or SCR (Silicon Controlled Rectifier), Triac (Triode for alternating current), Diac (Diode for alternating current), IGBT (Insulated Gate Bipolar Transistor), MOSFET (Metal Oxide Semiconductor Field Effect Transistor) and BJT (Bipolar Junction Transistor). Lastly, the electric energy in itself is not usable until it is converted into a tangible form of energy such as motion, sound, heat, light, etc. Technosys has designed a complete laboratory, with industrial components mounted on didactic panels, that covers the main configurations of power electronic circuits such as AC to DC conversion (Rectifiers), AC to AC conversion (fixed AC to variable AC at same input frequency or to AC with variable frequency), DC to DC conversion (Choppers), DC to AC conversion (Inverters) and applications as DC and AC motor driving.

AC-DC conversion - Diodes and SCR

AC-AC conversion - TRIAC and phase control

DC-DC conversion - Chopper and switching supplies

DC-AC conversion - Inverter and frequency converters

DC and AC motor driving

Software

To make some topics, covered in the various laboratories of power electronics, easier and more attractive, De Lorenzo has developed a software that allows studying in automatic mode the subjects concerning diodes and uncontrolled rectifiers, SCR and controlled rectifiers, thyristors and controlled AC/DC converters and induction motor drives. The software is divided in two parts one for power semiconductor devices (diode, SCR and thyristor) and one for variable frequency converter by means of the method of U/F characteristic curve. It is a Windows application that allows user to communicate with Power Electronics configuration through three main devices such as Isolation amplifier unit, PC interface unit and PWM control unit. It allows to work comfortably through a friendly interface, which makes possible to analyze the current configuration, and includes different graphs to monitor performance. It shows up with a very accurate graphic presentation and it is developed in LabVIEW environment.

Power Electronics Drives & Control Training Systems

ETAP  is the most comprehensive electrical engineering software platform for the design, simulation, operation, and automation of generation, transmission, distribution, and industrial systems.

ETAP Base Package is a set of core tools, embedded analysis modules, and engineering libraries that allow you to create, configure, customize, and manage your system model. Core tools allow you to quickly and easily build 3-phase and 1-phase AC and DC network one-line diagrams with unlimited buses and elements including detailed instrumentation and grounding components. 

Base Package includes an intelligent one-line diagram, element editors, verified and validated engineering device libraries, configuration manager, report manager, project and study wizards, multi-dimensional database, theme manager, data exchange, and user access management. Embedded analysis modules, such as Cable Ampacity, Cable Sizing, and Transmission Line Constants, provide integrated as well as stand-alone capabilities to design, analyze, and size equipment.

Network Analysis

Network Analysis includes a powerful set of analytical tools that allow for simulation, prediction, design and planning of system behavior utilizing an intelligent one-line diagram and the flexibility of a multi-dimensional database. Network Analysis includes Arc Flash, Short Circuit, Load Flow, Motor Acceleration, and Load Analyzer modules.

Renewable Energy

Wind Turbine Generator
 Model unlimited wind turbine generators
 Detailed modeling of turbine dynamics, aerodynamics, & power coefficients
 DFIG with pitch & converter controller
 Simulate wind disturbance like ramp & gust
 Individual or zone-based disturbances
 WECC wind turbine models
 WTG manufacturer / model library
 Support User-defined Dynamic Model controllers

Photovoltaic Array

 Solar farm modeling
 Solar irradiance based on location & time
 Performance adjustment coefficients
 AC & DC System Analysis
 Inverter dynamic modeling & operation modes
 Maximum Peak Power Tracking (MPPT)
 Constant current source modeling
 Model PV systems with individual panels
 Model DC cables & combiner boxes
 Extensive manufacturer / model library
 P-V & I-V curves

Each Laboratory Is Composed Of:

• Basic autonomous benches with power supplies capable of providing all voltages, in AC or DC, fixed and variable and stabilized in order to develop a course on electrical measurements and electrical machines;
• Universal bases to assemble the machines and to couple them to the other machines of the laboratory;
• Motors, generators, transformers, brakes, RLC loads, instrumentation and accessories to perform any test on electrical machines.

 

Each electric machine is equipped with a comprehensive training manual showing all tests that can be performed at no-load and load conditions.

• The control training systems effectively addresses the need to teach students the complexities of production control technology, by providing complete training solutions covering the following areas: Motor control systems Transducer and Instrumentation Programmabl
• D1750 is a rugged self-contained panel trainer with a steel case and integral power supplies. It provides a range of transducer input and output devices together with associated instrumentation circuitry, The transducer and signal conditioning elements of this trainer are typical of those used throughout industry, These elements include.
• OUTPUT DEVICES :For the generation of heat, light, rotary and linear actions, audible and ultrasonic sound and visual indication of voltage, time and number of event
• INSTRUMENTATION CIRCUITRY :For the investigation of Wheatstone Bridges and current. measurement techniques, Linear and non-linear signal amplification, closed and open loop control, one, two and three term (PID) control, DC restoration of AC signals, signal transmission techniques and alarm generation. The comprehensive competency-based curriculum manual provided with the D1750 covers the following topic areas :

The Electronics Explorer board (EE board) includes all of the test and measurement equipment needed to design and test analog and digital circuits of all types. Built around a large solderless breadboard, the EE board includes oscilloscopes, waveform generators, power supplies, voltmeters, reference voltage generators, and thirty-two digital signals that can be configured as a logic analyzer, pattern generator, or any one of several static digital I/O devices. All of these instruments can be connected to circuits built on the solderless breadboards using simple jumper wires. Designed for daily use and intended for every student to own, the EE board combines everything needed to design and test circuits in a single "all in one" device. Even in introductory classes, students can complete, test, and analyze real circuit designs as a part of every homework assignment. No more once a week labs; now every student can complete designs in virtually any setting - any residence can be a complete, 24-hour design studio! The EE board is powered by the free, PC-based WaveForms™ software that makes it easy to acquire, store, analyze, produce and reuse analog and digital signals. WaveForms™ runs well on virtually any notebook PC, including low-cost Netbooks. A high-speed USB2 connection ensures all EE board instruments respond in near real-time. WaveForms™ data files are stored using standard formats, making it easy to share data between instruments, and to export data to word processors or graphics editors. This means well documented student lab/project reports can be completed using standard office tools, and submitted electronically.

Electronics Explorer Board:

• All-in-one circuit design station powered by WaveForms™ soft
• 2 programmable reference voltages
• 2-channel Arbitrary Waveform Generator
• Triple-Output Power Supply (two programmable)
• 32-Channel Logic Analyzer
• Discrete digital I/O’s (buttons, switches, LEDs, etc)