Technical Specifications

Specifications

Modular Rack Mount Design:

– Three rows of compartments designed to house training modules
– Two of these rows have full-height compartments while  the  other  row  has  half-height compartments
–  Each  row  of  full-height  compartments  can  accommodate  up  to  three  full-size  EMS modules or six half-size EMS modules whereas the row of half-height compartments can accommodate up to three half-size training modules
– Separators between each bay of the workstation ensure perfect alignment of the modules

– A front-mounted release lever for each module row

– A safety locking device for each compartment
– Two safety padlocked bars on the front of the workstation prevent students from removing modules during laboratory exercises
– Holes in the rear panel of  the  workstation  with  removable  cover  plates  for  cable connection

Power Supply
Fixed single-phase and three-phase AC power, as well as fixed DC power, at the power levels required to operate the equipment used in that training program.

– Input: Line Voltage: 240/415 V

– Outputs: Fixed AC 3-Phase: 120/308 V – 5 A and Fixed DC: 120 V – 5 A

Power Thyristors

– Six (6) power thyristors (SCRs) each protected against over-currents and short-circuits

– All anodes and cathodes terminated on the faceplate by color-coded, 4 mm safety banana jacks
– Two (2) toggle switches on the faceplate  which  can  be  used  to  reduce  the  number  of external connections
– Peak Inverse Voltage: 600 V or equivalent

– Maximum Current: 1 A for 240/415 V) or equivalent

– Gate Control Signals: 0-5 V pulses (TTL compatible)

IGBT Chopper/Inverter

– Seven (7) insulated-gate bipolar transistors (IGBT)

– One of the seven IGBT and a dumping resistor allows smooth dissipation of excess energy at the DC bus

– The dumping circuit to be activated through the use of a toggle switch on the front panel

– IGBTs protected against short-circuits, overvoltage, overcurrent, and overheat

– DC Bus Maximum Voltage: 840 V or equivalent

– DC Bus Maximum Current: 6 A or equivalent

– DC Bus Filtering Capacitor: 450 uF or equivalent

– DC Bus Overvoltage Protection: 880 V or equivalent

– DC Bus Circuit Breaker Protection: 6 A or equivalent

– IGBT Electronic Overcurrent Protection: 12 A

– IGBT Overheat Protection: 70-degrees Celsius (approximately)

– Dumping Circuit Voltage Threshold: 660 V or equivalent

– Dumping Circuit Resistor: 250 Ohms, 100 Watts or equivalent

– Switching Control Signals Level: 0/5 V

– Switching Control Signals Frequency Range: 0-20 kHz

– Power Requirements: 24 V, 0.16 A, 50/60 Hz

Rectifier and Filtering Capacitors

Features of this equipment include:

– One (1) Three-Phase Bridge Rectifier

– Peak Increase Voltage: 800V or equivalent

– Maximum Current: 8 A or equivalent

– Two (2) Filtering Capacitors: 165 uF – 900 VDC or equivalent

Capacitive load

– Nine (9) oil-filled capacitors arranged in three(3) identical groups for balanced or unbalanced, three-phase-delta or star (wye) loading

– Group independently varied in seven (7) steps loading

– Group connection in parallel available to create a single-phase load variable in 21 steps

– All capacitors identified by a schematic symbol, their capacitance value, as well as the current that will flow through them when connected to a nominal voltage power source and their equivalent reactance

– All capacitors within 5% tolerance of the stated capacitance value

– Nominal Voltage: 240 V – 50 Hz

– Capacitance (group): 0.66 / 1.33 / 2.65 μF at 240/415 V – 50 Hz

– Reactance (group): 1200 / 2400 / 4800 Ω at 240/415 V

Three-Phase Transformer Bank

– Three (3) power transformers

– Fifteen (15) safety banana jacks on the module front panel

– Allows connection in wye or delta configurations

– The primary and secondary windings shall be protected against over-currents and short-circuits

– Rating of each transformer: 250 VA / 1.2 A

Filtering Inductors and Capacitors

– Low Frequency Filters:

Inductance: 50 mH – 5 A – 0-2 kHz (approx)

Capacitor (Aluminum Electrolytic): 210 μF – 450 V (approx)

– High Frequency Filters:

Inductance (2): 2 mH – 2.5 A – 0-20 kHz at 220/380 V and 240/415 V (approx)

Capacitor (Metallized Polupropylene): 5 μF – 400 V (approx)

Three-Phase Filter

– Three(3) inductors, each in-line on their respective line, and a set of three(3) wye-connected capacitors

– A connection to the center point of the wye connection

– An additional capacitor (1) in series with the center point

– Inductors (3): 2 mH – 5 A – 0-2 kHz (approx)

– Metallized Polypropylene Capacitors (4): 5 μF – 400 V (approx)

Permanent Magnet DC Motor

– High-speed DC brush motor

– Equipped with a pulley half the size of the standard training system pulleys to experience power transmission with different gear ratios

– Output Power: 222 W (approx)

– Nominal Voltage: 48 V DC (approx)

– Nominal Speed: 4000 rpm (approx)

– Nominal Torque: 0.525 Nm (4.65 lbf·in) (approx)

Timing Belt

It shall consist of an industrial synchro-cog rubber timing belt.

Four-Quadrant Dynamometer/Power Supply

– Computer-based function control as well as manual function control capability using the front panel buttons

– 500 Watts or more power supply (approx)

– A variable AC and DC voltage source up to 150 Volts (approx)

– A variable current source up to 5 Amps (approx)

– Front panel LCD showing operational values such as voltage, current, electrical power, speed, torque, and mechanical power in real time

– User-selectable functions such as: positive and negative voltage source, DC voltage source, positive and negative current source, DC current source, 50 Hz and 60 Hz power source, variable frequency AC power source, lead-acid battery float charger, two-quadrant constant torque brake, clockwise and counter-clockwise prime mover/brake, clockwise and counter-clockwise constant-speed prime mover/brake, four-quadrant constant speed prime mover/brake, positive and negative constant-torque prime mover/brake, speed sweep

– A permanent magnet (PM) DC motor running up to 2500 RPM or more both clockwise and counter-clockwise and up to 3 Newton-meter (Nm) or more

– A pulley mounted on the shaft of the PM-DC motor for mechanical coupling with other motors

– One (1) command input of -10 to 10 Volts

– One (1) thermistor input

– Two (2) shaft encoder outputs

– Two (2) analog outputs of -10 to 10 Volts

– One (1) USB 2.0 port

– Overcurrent, overvoltage and fault resettable protection

Data Acquisition and Control Interface DAQ (DACI)

DAQ DACI shall be used to measure, observe, analyze, and control electrical and mechanical parameters in electric power systems and power electronics circuits. The DACI shall have software that allows training in Power Electronics.

The DACI shall complete two main functions of data acquisition, feeding raw signal data to the computer-based instruments and data acquisition for implementing a control function. The DACI shall have four isolated, high-level voltage inputs and four isolated, high-level current inputs. The DACI shall have a set of digital outputs which can be used to control power electronics components such as IGBTs and Thyristors.

The DACI shall have the following technical features:

– Low/High Insulated Voltage Inputs Range: -80 to +80 / -800 to +800 V

– Low/High Insulated Voltage Inputs Impedance: 326.6 kOhms / 3.25 MOhms

– Voltage Inputs Bandwidth: DC to 65 kHz (-3 dB)

– Voltage Inputs Accuracy: 1% (DC to 10 kHz)

– Low/High Insulated Current Inputs Range: -4 to +4 A / -40 to +40 A (25 A RMS)

– Low/High Insulated Current Impedance: 50 mOhms / 5 mOhms

– Current Inputs Bandwidth: DC to 65 kHz (-3 dB)

– Current Inputs Accuracy: 1% (DC to 10 kHz)

– Analog Inputs (8) Voltage Range: -10 to +10 V

– Analog Inputs Impedance: Less than 10 MOhms

– Analog Inputs Bandwidth: DC to 125 kHz– Analog Outputs Voltage Range: -10 to +10 V

– Analog Outputs Operational Load Impedance: Less than 600 Ohms

– Digital Inputs Types: Encoder (2), Synchronization (1)

– Digital Inputs Signal Level: 0-5 V (TTL compatible)

– Digital Inputs Maximum Input Frequency: 50 kHz

– Digital Inputs Impedance: 5 kOhms

– Digital Outputs (8 total) Type: Control (DB9 connector and 2mm banana jacks)/Synchronization (DB9)

– Digital Outputs Signal Level: 0-5 V (TTL compatible)

– Digital Outputs Maximum Output Frequency: 20 kHz (software limited)

– Digital Outputs Impedance: 200 Ohms

– Computer I/O Interface: USB 2.0 full speed via type-B receptacle

Connection Leads Kit

– PVC-covered, extra-flexible lead:

4-mm Safety socket: 20 x 30 cm (12 in), 10 x 60 cm (24 in), 4 x 90 cm (36 in)

2-mm Safety sockets: 4 x 60 cm (24 in)

– Lead Holder

 

Basic Experiment Possibilities:

1. Basic measurement and characteristics of SCR,TRIAC

1.1  Operation of RMS meter and measuring of three phase voltage

1.2  Operation of storage oscilloscope and differential amplifier

1.3  Measurement and characteristic of SCR

1.4  Measurement and characteristic of TRIAC

 

2. Single / Three phase rectifier and phase control (AC – DC, AC – AC)

2.1  Single phase half-wave uncontrolled rectifier (Half wave rectifier)

2.2  Single phase full-wave uncontrolled rectifier (Full wave rectifier)

2.3  Operation of reference variable generator and three phase angle controller

2.4  Operation of voltage/current to measuring transducer

2.5  Single-phase half-wave controlled rectifier (Half-wave controlled rectifier)

2.6  Single-phase full-wave controlled rectifier

2.7  Single-phase full-wave semi-symmetric controlled rectifier (Symmetric)

2.8  Single-phase full-wave semi-asymmetric-controlled rectifier (Asymmetric)

2.9  Single phase semi controlled AC regulator

2.10Single phase full controlled AC regulator

2.11Three phase half wave uncontrolled rectifier

2.12Three phase full wave uncontrolled rectifier

2.13Three phase half wave controlled rectifier

2.14Three phase full wave semi-controlled rectifier

2.15Three phase full wave full controlled rectifier

2-16Three phase full-wave semi-controlled AC regulator

2-17Three phase full-wave full-controlled AC regulator

 

3. DC Chopper Circuit and Characteristic of IGBT (DC – DC)

3.1  Measurement and characteristics of IGBT

3.2  Basic description of DC chopper

3.3  Single quadrant DC chopper

3.4  Two quadrant DC chopper

3.5  Four quadrant DC chopper

 

4. Single / Three Phase Frequency Converter (AC – DC – AC)

4.1  Basic description and principle of frequency converter

4.2  Single phase PWM controller circuit

4.3  Single phase frequency converter

4.4  Analysis of Three–phase PWM controller circuit

4.5  Three–phase PWM controller circuit

4.6  Three–phase frequency converter

5. Switching Power Supply Circuit and Characteristics of MOSFET (DC – DC)

5.1  Measurement and characteristics of MOSFET

5.2  Buck switching power supply

5.3  Boost switching power supply

5.4  Buck-Boost switching power supply

5.5  Fly-back switching power supply

 

6. Electronic Ballast circuit (AC – AC)

 

7. Inverter (DC – AC)

7.1  Single Phase Half Bridge Square Wave Inverter

7.2  Single Phase Full Bridge Square Wave Inverter

7.3  PWM Inverter and Frequency Inverter

 

Software theory

The trainer comes with computer aided learning software which cover the following topics:

1. Definition, Insulators, Semiconductors and Conductors, Type of Semiconductors, PN Junction Diode, Transistor PNP & NPN, Power Electronic Devices
2. Turn-On Methods of a Thyristor, Gate Triggering Methods, Turn-Off Method
3. General Firing Circuit, Resistance Firing Circuit, Resistance-Capacitance Firing Circuit for Half and Full Wave, UJT Oscillator, Synchronized UJT Triggering (Ramp Triggering), Ramp and Pedestal Triggering
4. Uncontrolled Rectifiers (Half Wave, Full Wave and Bridge), Firing Circuits for Controlled Rectifiers (using Triangular Comparator, Ramp Comparator, Cosine Firing Scheme, IC-TCA785), Controlled Rectifier (Single Phase Half, Full, Semi Converter and Bridge Rectifiers with R-Load and RL-Load), Applications
5. Series Inverter, Parallel Inverter, Bridge Inverter, Applications
6. DC-DC Chopper (Introduction, Step-Down Chopper, Step-Up  Chopper), AC Chopper, Applications
7. Frequency Converter Firing Scheme, Single Phase Frequency Converter, Applications
8. AC Voltage Controller Half and Full Wave with R-Load and RL-Load, Application