DC / AC Conversion

Electric energy is tapped at the car battery in the form of DC voltage and is then applied as a DC current. However, in modern electrical drives an AC voltage is needed with an approximate sinusoidal alternating current. In this course the generation of AC voltage and currents is described and demonstrated in a simple and graphic fashion. The knowledge acquired in the theoretical section is then verified empirically by means of experiment. All of the components needed for the experiment are arranged on a single printed circuit board. In knowledge tests the student's progress is checked and thus the most important aspects of DC/AC conversion are effectively learned in the fastest possible time.

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UniTrain: DC/AC Conversion in Vehicles

This UniTrain course provides easy-to-understand material on the benefits and function of DC/AC conversion in the automotive area. Thanks to target-group oriented theory and practical experiments, the trainee becomes familiar with the technical processes and components required to make DC/AC conversion possible. 

Includes:

• 1 Experiment card (potentiometer and incandescent lamp, PWM generator, DC-AC converters)
• LabSoft browser course software and virtual instruments

Training contents:

• Electrical induction
• Lorentz force
• “Right hand rule”
• Relationship between current and voltage
• Pulse width modulation (PWM)
• PWM and voltage
• PWM and current
• Generating upper half-wave
• Generating AC voltage
• Rotating electrical field

Additionally Required

The UniTrain-I system is a computer-based training and experimentation system for vocational and further training and education in the areas of basic and advanced electrical engineering and electronics. Its multimedia courses combine cognitive and hands-on (haptic) training units into a comprehensive unified concept, specifically enabling students to acquire skills in the handling of equipment. Starting with basic courses and advancing to cover a huge variety of electrical engineering and electronics topics, a wide range of multimedia courses is available for study in school or in professional and advanced training courses. The UniTrain-I system is completely self-contained and can be used anywhere at any time. The multimedia learning environment the system provides high degrees of motivation, and maximum learning effectiveness in laboratories, at work or at home. It thus becomes a guarantor for effective and efficient study. Access to the multimedia courses and control of virtual instruments and experiment hardware is provided by LabSoft, the system's open experiment platform. The courses teach the theoretical building blocks and provide experiments to be carried out using the course-specific experiment hardware. The intelligent measurement interface supplies the analog and digital measuring and control I/O and represents, in combination with the system's virtual instruments, a high quality item of laboratory equipment. In addition, students' progress can be monitored and electronically documented on the basis of fault finding experiments with faults simulated by the hardware as well as tests of knowledge. The electrical and electronic circuits needed for the experiments are connected to the system with the aid of an Experimenter module.

UniTrain Interface with Virtual Instruments (Basic VI)

The UniTrain Interface is the central unit of the UniTrain system. It incorporates all inputs and outputs, switches, power and signal sources and measurement circuitry needed to perform experiments. The Interface is controlled via the connected PC.

Equipment:

• 32-bit processor with storage memory for measurements
• USB interfaces, transfer rate 12 Mbits/s
• WLAN/WiFi interface, 2.4 GHz, IEEE 802.11 b/g/n
• Simultaneous connection of any number of Experimenters via serial bus system
• High-quality designer casing with aluminium feet and surface-hardened Plexiglas front panel
• Suitable for accommodating in training panel frames for DIN A4 training panels
• Designed for connection of 2-mm safety measuring leads
• Multi-coloured LEDs for displaying status
• Adjustable analog output, +/-10 V, 0.2 A, DC – 5  MHz, via BNC and 2-mm sockets
• 4 Analog differential amplifier inputs with 10 MHz band width, safe for voltages up to 100 V, sampling rate 100 mega samples, 9 measuring ranges, memory depth 4 x 8 k x 10 bits, inputs via BNC (2 inputs) or 2-mm sockets (4 inputs)
• 2 Analog inputs for current measurement, overcurrent-protected up to 5 A, sampling rate 250 kilo samples, 2 measuring ranges, resolution 12 bits, connection via 2-mm sockets
• 3 variable analog outputs +/- 20V, 1 A, DC-150 Hz (requires CO4203-2B)
• 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, memory depth 16 bit x 2 k, TTL/CMOS, sampling rate 0 – 100 kHz, electric strength +/- 15 V,
• 8 Relays, 24 V DC/1 A, of which 4 are accessed via 2-mm sockets
• Dimensions: 29.6 x 19 x 8.6 cm
• External power supply with wide range input 100-264 V, 47-63 Hz, output 24 V / 5 A
• Weight (including power supply): 2.1 kg

Virtual instruments (meters and sources):

• 2 x Voltmeter VIs, 2 x Ammeter VIs: AC, DC, 9 ranges, 100 mV to 50 V, true RMS, AV
• 1 x Power meter, 9 ranges, 100 mV to 50 V
• 1 x VI with 8 relays, 1 x Multimeter VI: multimeter display (optional LM2330, LM2331 or LM2322) in LabSoft
• 1 x 2-channel ammeter VI: AC, DC, 2 ranges, 300 mA and 3 A, TrueRMS, AV
• 1 x 2-channel voltmeter VI: AC, DC, 9 ranges, 100 mV to 50 V, TrueRMS, AV
• 1 2-/4-channel oscilloscope: band width 10 MHz, 25 time ranges, 100 ns/div to 10 s/div, 9 ranges 20 mV/div to 10 V/div, trigger and pre-trigger, XY and XT modes, cursor function, addition and multiplication function for 2 channels
• 1 x VI Spectrum Analyzer: 9 voltage ranges 100 mV to 50 V, input frequency range 3 Hz to 1 MHz, time domain display
• 1 X VI Bode-Plotter: 9 voltage ranges 100 mV to 50 V, frequency range 1 Hz - 5MHz, time domain display and locus diagram
• 1 x Adjustable DC voltage VI 0 - 10 V
• 1 x Function generator VI: 0.5 Hz - 5 MHz, 0 - 10 V, sine, square, triangular,
• 1 x Arbitrary generator VI, 1 x Pulse generator VI
• 1 x VI with 16 digital outputs, 1 x VI with 16 x digital inputs, 1 x VI with 16 digital input/outputs. Display modes: binary, hex, decimal and octal numerals
• 1 x Three-phase power supply VI, 0 - 150 Hz, 0 - 14 Vrms, 2 A (requires CO4203-2B)
• 1 x Adjustable DC power supply VI, 3 x (-20 V - +20 V), 2 A (requires CO4203-2B)
• 1 x Three-phase power supply VI with additional phase-shift and clock rate adjustment (requires CO4203-2B)

Includes:

• Interface
• Power supply
• Power lead
• USB cable
• CD with basic software
• Operating manual

System requirements:

• Personal computer with Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10 (32 or 64 bit)
• CD-ROM drive for installing software
• USB port for connection to Interface

UniTrain Experimenter

UniTrain Experimenter for coupling to the UniTrain Interface or to other Experimenter modules.

Equipment:

• Connects to the UniTrain Interface and additional Experimenters via UniTrain bus
• UniTrain bus connection for experiment cards
• High-quality designer casing with aluminium feet and surface-hardened Plexiglas front window
• Suitable for accommodating training panel frames for DIN A4 training panels
• Fixed and variable voltages available via 8 2-mm sockets
• Designed for connection of 2-mm safety measuring leads
• Accommodates UniTrain experiment cards
• Eject mechanism for UniTrain experiment cards with return spring
• Accommodates a breadboard for experimenting with discrete components and integrated circuits
• Accommodates a multimeter using IrDa interface
• Dimensions: 29.6 x 19 x 8.6 cm
• Weight: 1.0 kg

UniTrain Measurement Accessories, Shunts and Connection Cables

Shunt resistors on a PCB, for current measurement using the analog inputs of the UniTrain system.

• 6 Shunt resistors: 2 x 1 ohm, 2 x 10 ohm, 2 x 100 ohm
• Screen print of symbols for identifying resistors, the voltage taps and current inputs
• 24 x 2-mm sockets
• Dimensions: 100 x 40 mm

Set of connection cables 2 mm (28 pcs) for UniTrain consisting of:

• 8 x connection leads 2 mm, 15 cm, blue
• 4 x connection leads 2 mm, 15 cm, yellow
• 5 x connection leads 2 mm, 45 cm, black
• 2 x connection leads 2 mm, 45 cm, yellow
• 5 x connection leads 2 mm, 45 cm, red
• 2 x connection leads 2 mm, 45 cm, blue
• 1 x safety adapter lead 4 mm to 2mm, 50 cm, black
• 1 x safety adapter lead 4 mm to 2mm, 50 cm, red
• 10 x 2-mm connector plugs / Plug spacing 5 mm, white

Additionally Recommended

UniTrain Storage Case for One System

Sturdy aluminium case with moulded foam block to accommodate a complete UniTrain system (without equipment)

• Capable of accommodating 1 Interface, 2 Experimenters, 1 power supply as well as cables and smaller accessories
• Lockable padlock; stable padlock hinge
• Colours: aluminium, black, chrome
• Dimensions: 610 x 480 x 100 mm
• Weight: 4,6 kg