A comprehensive laboratory-grade training system designed for academic and industrial institutions to study the construction, operation, characteristics, and performance of DC machines. The system supports both instructor-led and blended e-learning environments and includes hardware, software, safety elements, and digital learning resources.

1. SYSTEM OVERVIEW
The Complete Training System for DC Machines provides hands-on experimentation for the following topics :

Training Topics Covered

• Design and functional structure of DC machines
• Armature reaction & commutation
• Energy conversion principles
• Series-wound, shunt-wound, and compound DC machines
• Speed control methods
• Operation at constant speed
• Self-excitation
• Current–voltage characteristics
• Load characteristics
• Starting and braking techniques
• Generator operating characteristics
• Power performance analysis

The system includes a full experimental guide available in printed form and as an interactive digital learning platform with :

• Teacher & student modes
• Tasks with and without answers
• Interactive applications
• No PDF-only formats accepted 

2. SYSTEM COMPONENTS
2.1 DC COMPOUND MACHINE – 0.3 kW
Motor and generator configurable as shunt, series, or compound machine. All windings individually connected via 4-mm safety sockets. Includes thermal protection.

Ratings – Shunt Motor

• Power : 0.3 kW
• Voltage : 220 V
• Current : 1.8 A
• Excitation : 200 V / 0.26 A
• Speed : 2000 rpm

Ratings – Shunt Generator

• Power : 0.22 kW
• Voltage : 220 V
• Current : 1 A
• Excitation : 200 V / 0.26 A
• Speed : 2500 rpm

Ratings – Series Motor

• Power : 0.3 kW
• Voltage : 220 V
• Current : 1.74 A
• Speed : 2050 rpm

Ratings – Compound Motor

• Power : 0.3 kW
• Voltage : 220 V
• Current : 1.83 A
• Excitation : 200 V / 0.26 A
• Speed : 1645 rpm

Ratings – Compound Generator

• Power : 0.22 kW
• Voltage : 220 V
• Current : 1 A
• Excitation : 200 V / 0.26 A 
• Speed : 2400 rpm

2.2 Universal Motor – 0.3 kW
Suitable for AC (230 V) and DC operation.

AC Ratings

• Power : 0.2 kW
• Voltage : 230 V / 50 Hz
• Current : 2.5 A
• Speed : 3000 rpm

DC Ratings

• Power : 0.2 kW
• Voltage : 140 V
• Current : 3 A
• Speed : 3000 rpm

2.3 Starter 0.3 kW
Circular step-wound rheostat (0–100%) for DC motor starting.

• Resistance : 47 Ω
• Current : 2.5 A

2.4 Resistive Load – 0.3 kW
Three synchronously adjustable rheostats (0–100%). Suitable for series, parallel, star, and delta.

• Resistance : 3 × 1800 Ω
• Series resistance : 3 × 47 Ω
• Current : 3 × 1 A

2.5 On/Off Switch – Three-Pole

• Load : 20 A / 500 V AC
• Positions : 0 – 1

2.6 Power Circuit Breaker Module
3-phase ON/OFF switch with NC auxiliary contact for 380 kV line model simulation. Supports manual or external control.

• Load : 400 V AC / 3 A
• Control : TTL / 24 V DC / switching contact
• LED indication & TTL output of switch state
• Supply : 115/230 V, 50 Hz

2.7 Field Regulator – Motor (0.3 kW)

• Circular rheostat 0–100%
• Resistance: 560 Ω
• Current: 0.52 A

2.8 Field Regulator – Generator (0.3 kW)

• Circular rheostat with short-circuit contact
• Resistance: 560 Ω
• Current: 0.52 A

3. MACHINE TEST SYSTEM (WITH 4-CHANNEL DATA ACQUISITION)
A complete test bench for standardized IEC/DIN 60034-2-1 machine testing.

Key Capabilities

• Loss & efficiency testing (IE1–IE4)
• Torque measurement with strain-gauge sensor
• Automatic run-up & load characteristics
• Standalone operation via integrated color display
• Supports digital learning platforms
• Multiple load simulation models :  Flywheel mass, Fan load (M k·n²) ∼ , Winding drive (M k/n) ∼ , Lifting drive (constant torque) , User-defined torque curves

Ratings

• Nominal capacity : 300 W
• Max electrical capacity : 1800 W

3.1 Measurement Ranges

• Speed : ±2000 / ±3500 / ±5000 rpm

Torque : ±10 Nm

Mechanical Power : ±200 / ±600 / ±1200 W

Electrical Power : ±600 / ±1200 / ±1800 W

Voltages

• DC : ±36 / ±150 / ±360 / ±700 V
• AC : 25 / 100 / 250 / 490 V

Currents

• DC : ±1 / ±2.4 / ±10 / ±24 A
• AC : 0.7 / 1.6 / 7 / 16 A

3.2 Integrated Display & Control Unit

• 3.5" QVGA color display
• Shows up to 24 values simultaneously
• Tables, vector diagrams, plots, configuration menus
• Rotary encoder controls

Comfort Features

• Wireless operation via WLAN (AP or Client mode)
• Supports iOS, Android, Windows
• HTTP & VNC server
• USB-C interface
• Audible error alarms
• Internal MicroSD storage (10,000 readings/series)
• CAT III 300 V rated
• FPGA real-time processing

4. PC SOFTWARE FOR TEST SYSTEM
Full-featured PC application with experiment automation.

Key Features

• Plug-and-play detection of modules
• Graphical device representation
• Analog/digital instruments, tables, diagrams
• Manual or automated recording
• Fits : line, parabola, hyperbola, exponential
• Formula editor, FFT, integration, differentiation
• XML experiment files
• Clipboard export
• Logbook function
• Includes 150+ sample experiments

5. INSTRUMENTATION & ACCESSORIES
5.1 Digital Multimeter
Features

• Automatic socket blocking
• Fuse & overload warning
• TRMS AC & AC+DC
• Auto/manual ranges
• 4½-digit display

Ranges

• DC/AC Voltage : 100 mV…1000 V
• DC/AC Current : 1 A…10 A
• Resistance : 100 Ω…40 MΩ
• Frequency : 100 Hz…30 kHz
• Temperature : –250…+1372 °C

5.2 Adjustable Transformer (0–260 V, 4 A)

• Input : 230 V ±10%
• Output : 0–260 V / 4 A
• Thermomagnetic safety switch 5 A
• 4-mm safety sockets

5.3 Mechanical Accessories

• Coupling 0.1/0.3 kW – rubber sleeve
• Shaft End Guard 0.1/0.3 kW
• Transparent Coupling Guard 0.3 kW

5.4 RMS Meter

• True RMS measuring instrument (moving coil).
• Voltage : 3…1000 V
• Current : 0.1…30 A
• Class : 2.5

5.5 Moving Iron Meters

• Ammeter : 0–2.5 A (Class 1.5)
• Voltmeter : 0–100 V / 0–400 V (Class 1.5)

5.6 Power Engineering Accessories

• Equipment trays
• Safety bridging plugs (black, yellow/green)
• 32-piece safety lead set
• Yellow/green protective lead set
• Mobile experiment stand
• Additional equipment boards