The Electrical machine Fundamentals Training System is a complete program designed to introduce students to the fundamentals The Electrical machine. They learn to connect circuits, measure electrical parameters, perform calculations, and troubleshoot.


1. Main Interface Unit
Main interface unit for training on the fundamentals of electrical machines
Main Features
• 32-bit processor with storage memory for measurements
• USB interfaces, transfer rate 12 Mbits/s
• Analog output, +/- 10 V, 0,4A, DC – 1 MHz, via BNC and 2-mm sockets
• 2 Analog differential amplifier inputs with 4 MHz bandwidth, safe for voltages up to 100V
• 16-bit digital signal output, of which 8 bits are accessed via 2-mm sockets, TTL / CMOS
• Clock frequency 0 –100 kHz, electric strength +/- 15 V
• 16-bit digital signal input, of which 8 bits are accessed via 2-mm sockets, TTL / CMOS,
• 8 Relays 24V DC / 1 A, of which 4 are accessed via 2-mm sockets
Specifications
• 2 x Voltmeter, 2 x Ammeter, true RMS, AV
• 1 Dual-channel oscilloscope: band width 4MHz
• 1 x Adjustable DC voltage 0 - 10 V
• 1 x Function generator 0.5 Hz - 1MHz, 0 - 10 V, sine, square, triangular
• 1 x Arbitrary generator, 1 x Pulse generator
• 1 x with 16 digital outputs, 1 x with 16 x digital inputs, 1 x with 16 digital input/output Display modes: binary, hex, decimal and octal numerals
• 1 x Three-phase power supply
• 1 x Adjustable DC power supply
• 1 x Three-phase power supply with additional phase shift and clock rate adjustment
• 3-phase motor control unit
• DC motor control unit
• Motor temperature meter
• Stroboscope
• DC power supply with static resistor control
• AC power supply with static resistor control
2. DC Machine Training Set
DC machines training set for training purposes
Main Features
• Stator, two pole with two isolated windings, ends are connected to sockets for shunt-wound and series-wound configuration
• Armature with commutator
• Brushes adjusted to -20, -10, 0, 10, 20
• Shunt resistor used for measuring armature or exciter currents
• Wire wound resistor used for armature startup resistor or exciter resistor
• Resistors with overload relays for startup experiments
• Bulb used as load to generator
• Temperature sensor
• Computer control software
Experiments/Activities
• Identifying the most common applications for DC machines
• Explanation of electromagnetic induction and the Lorentz force
• Explanation of design and function of commutated machines (DC machines)
• Introduction to the key components of commutated machines, stator, commutator and carbon brushes
• Measurement of current and voltage in armature and exciter and determining the armature and exciter impedances
• Interpreting a rating plate
• Introduction to circuit diagrams and characteristics for various types of connection: series, shunt and compound windings
• Connection and operation of DC machines in various operating modes
• Speed measurement using a stroboscope
• Introduction to various types of speed regulation and reversal: field weakening, modification by means of armature and field resistors
• Experimental investigation of various methods for controlling speed and direction of rotation
• Connection and operation of commutated machines with AC voltages: universal motors
• Introduction to methods of braking DC machines
• Measurement of current and voltage when braking DC machines
• Explain the importance of temperature monitoring for electrical machines
• Temperature measurement in the exciter winding when a machine is running using a semiconductor sensor
3. Asynchronous Machine Training Set
Asynchronous machine set for training purposes
Main Features
• Stator, two-pole, 3 winding ends accessible via sockets
• Connections for delta or star configuration is allowed
• Rotor with permanent magnet and single phase winding for experiments on static magnetic field or for the assembly of a synchronous machine with permanent magnet rotor and experiments on topics involving three-phase transformers, measurements of no-load voltage and short-circuit current in the rotor
• Inductor with short-circuit rotor for the assembly of an asynchronous motor with squirrel-cage rotor
• Temperature sensor
• Assembly of a capacitor motor via a capacitor for operation on a single phase power supply
• Computer control software
Experiments/Activities
• Identifying the most common applications of rotating field machines
• Explanation of the principles of electromagnetic induction
• Explanation of the design and function of rotating field machines
• Explanation of the differences between motor and generator operation
• Introduction to the key components of a rotating field machine, the rotor and stator
• Experimental demonstration of how torque arises and of the generator principle
• Creation of a rotating magnetic field by rotating field machines: experimental demonstration of a rotating magnetic field in the stator
• Introduction to the principle of a three-phase transformer
• Investigation by measurement of three-phase machines in star and delta configurations
• Measurement of phase-to-phase and line-to-line voltage and current
• Measurement of rotor voltage and current
• Interpreting a rating plate
• Introduction to nominal data and characteristic parameters for electrical machines, power factor, pole-pairs, torque, speed and slip
• Introduction to the design and function of asynchronous machines with squirrel cage rotors
• Investigation by measurement of a squirrel-cage rotor, frequency response characteristics, reversal of rotation
• Investigation by measurement of the operating response of a synchronous machine with a permanent magnet rotor
• Introduction to the principle of a capacitor motor (Steinmetz circuit)
• Investigation by measurement of the operating response of a capacitor motor
• Explanation of the importance of temperature monitoring in electrical machines
• Measurement of winding temperature in running machines
• Fault simulation
4. Synchronous and Slip-ring machines
Synchronous and slip-ring machines set for training purposes
Experiments/Activities
• Identifying the most common applications for synchronous rotors, slip-ring rotors and reluctance machines
• Explanation of a how a magnetic field arises in rotating field machines
• Explanation of the design and function of synchronous, slip-ring and reluctance machines
• Introduction to the key components of synchronous, slip-ring and reluctance machines (including salient pole, non-salient pole and reluctance rotors)
• Introduction to circuit diagrams, terminal charts and nominal data for synchronous, slip-ring and reluctance machines
• Interpreting a rating plate
• Introduction to the principles of speed control of slip-ring rotor machines
• Experimental investigation of the operating response of slip-ring rotor machines
• Measurement of rotor voltages with open and shorted rotor windings, response to starting resistors, determining slip and speed by means of voltage measurements
• Explanation of the differences between motor and generator operation of synchronous machines
• Introduction to the principles of speed control of synchronous machines
• Experimental investigation of the operating response of synchronous machines: run-up behaviour, speed measurement, power factor determination (cos j) with the aid of current and voltage measurements
• Experimental investigation of the operating response of reluctance machines: creation of torque, run-up response, asynchronous and synchronous operation, reversal of rotation, power factor determination (cos j) with the aid of current and voltage measurements
5. Stepping Motor Training Set
Stepping motor set for training purposes
Main Features
• Driver circuit with control inputs and power amplifier
• integrated current regulation, optional switching to resistor current limiting
• Overload and status display via LEDs
• Course software
Experiments/Activities
• Introduction to customary applications of stepper motors
• Introduction to the design and function of stepper motors: Permanent-magnet stepper motors, reluctance and hybrid stepper motors
• Identifying the advantages and disadvantages of various stepper motors
• Introduction to the various principles for controlling stepper motors (unipolar und bipolar)
• Introduction to full-step and half-step operating modes
• Experimental determination of step angle, maximum operating frequency and maximum start frequency
• Investigation by measurement of control signals in half-step and full-step mode
• Analysis of control signals when rotation is reversed
• Introduction to various methods of current regulation for stepper motors
• Experimental determination of the current regulation in use on the basis of control signals
• Writing a program for positioning the stepper motor using relative or absolute position
6. Brushless DC Motor Training Set
Brushless DC (BLDC) motor set for training purposes
Main Features
• 1 Experiment card featuring a brushless DC (BLDC) motor with electronic commutation, speed and torque control plus Hall sensors for measuring speed
• CD-ROM with browser and course software
Experiments/Activities
• Introduction to common applications of BLDC motors
• Introduction to design and function of BLDC motors
• Experimental investigation of how BLDC motors work
• Advantages and disadvantages of BLDC motors
• Introduction to various circuits for controlling BLDC motors: square and sine-wave current signals
• Measurement and analysis of circuits
• Introduction to various methods of detecting rotor position: Hall sensors, back-emf, pole detection, resolvers and incremental sensors
• Measurement of position using Hall sensors
• Introduction to current and speed control of BLDC motors
• Experimental investigation of speed control
• Setting parameters for speed control
7. Linear Motor Training Set
Linear motor set for training purposes
Main Features
Experiment board with:
• Transparent linear motor with non-ferrous armature
• Range 350mm approx.
• Integrated microprocessor control
• 35W power amplifier
• Visualisation of control vector
• Position detection with analog Hall sensors
• CD-ROM with browser and course software
Experiments/Activities
• Introduction to design and operating principle of a linear motor
• Explanation of terms "Lorentz force" and "induced voltage"
• Introduction to linear motor applications
• Designs of linear motors
• Advantages and disadvantages of linear motors in comparison to rotary motors
• Determination of characteristic values for a motor
• Positioning of a linear motor
• Determining motor position with the help of encoders or Hall sensors
• Distinction between relative and absolute positioning
• Determination of motor position using analog Hall sensors

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