I. Basic Requirements This electrical and electronic engineering training kit meets the experimental teaching needs of courses such as “Circuit Analysis,” “Basic Electrical Engineering,” “Electrical Engineering,” and “Motor Drives.” Besides completing the corresponding experimental projects for these courses, it also meets the engineering training requirements of universities and colleges.
II. Structure and Manufacturing Process
- This kit features a double-layer aluminum alloy frame structure. The frame allows for the detachable installation of AC power modules, DC power supplies, signal generators, AC/DC measuring instruments, experimental modules, etc. An experimental table is provided at the bottom, equipped with storage cabinets and drawers.
- This kit provides multiple protection functions to ensure student safety. The power supply and measuring instruments are designed with circuit breaking, open circuit, and over-range protection functions to ensure equipment safety.
- This kit includes the necessary instruments for experiments, such as a single-phase adjustable power supply, a 380V three-phase AC power supply, a DC power supply (including constant current and constant voltage sources), a signal generator and frequency counter, AC voltmeters and ammeters, single-phase and three-phase power and power factor meters, and DC voltmeters and ammeters.
III. Completeable Experiments
- Electrical Engineering Experiments
1) Use of electrical instruments and calculation of measurement errors
2) Methods to reduce instrument measurement errors
3) Design and experiment of instrument voltage limit extension circuit
4) Design and experiment of instrument current limit extension circuit
5) Plotting of known component volt-ampere characteristics
6) Measurement of potential and voltage and plotting of potential diagrams
7) Verification of Kirchhoff’s laws and superposition principle
8) Verification of Thevenin’s theorem
9) Principle and experimental testing of equivalent network transformation
10) Experiments and design of VCVS, VCCS, CCVS, and CCCS
11) Experiments on two-port networks
12) Observation and measurement of typical electrical signals
13) Response and testing of first-order RC circuits
14) Study of second-order dynamic circuit response
15) Determination of impedance characteristics of R, L, and C components
16) Characteristic testing of gyroscopes
17) Use of oscilloscopes
18) Testing of double-T networks
19) Characteristic testing of RC frequency selective networks 20) Series Resonance of R, L, C
21) Measurement of Equivalent Parameters of AC Circuit Using the Three-Meter Method
22) Power Factor Improvement Experiment
23) Measurement of Mutual Inductance Circuit
24) Testing of Characteristics of Single-Phase Iron Core Transformer
25) Measurement of Voltage and Current in Three-Phase AC Circuit
26) Measurement of Power in Three-Phase Circuit
27) Measurement of Power Factor and Phase Sequence - Motor Drive Experiment
1) Direct Starting Control of Three-Phase Asynchronous Motor
2) Y/Δ Starting of Three-Phase Asynchronous Motor
3) Forward and Reverse Rotation Experiment of Three-Phase Asynchronous Motor
4) Sequential Starting of Three-Phase Asynchronous Motor
5) Energy Consumption Braking - Virtual Simulation Training of Motors
1) Experiment on Working Characteristics of Three-Phase Squirrel-Cage Asynchronous Motor
2) Experiment on Variable Frequency Speed Regulation of Three-Phase Asynchronous Motor - Virtual Simulation Experiment Content of Electrical and Electronic Technology Principles (Based on the General Multisim Software Platform)
1) Kirchhoff’s Laws
2) Verification of Superposition Principle
3) Verification of Thevenin’s Theorem
4) Determination of Impedance Characteristics of R, L, C Components
5 5. Electrical Circuit 3D Animation Teaching Virtual Simulation Training Project
1) Introduction to Electrical Experiment Platform
2) Mapping of Volt-Ampere Characteristics of Linear and Nonlinear Components
3) Verification of Kirchhoff’s Laws
4) Verification of Superposition and Homogeneity of Linear Circuits
5) Voltage Source, Current Source and Equivalent Transformation of Power Sources
6) Verification of Thevenin’s Theorem and Norton’s Theorem
7) Testing of Impedance Characteristics of R, L, C Components
8) Study of R, L, C Series Resonant Circuits
9) Study of Mutual Inductance Coil Circuits
10) Experimental Test on Improving Power Factor of Fluorescent Lamps
11) Measurement of Mutual Inductance Circuits
12) Testing of Characteristics of Single-Phase Iron Core Transformers
13) Measurement of Voltage and Current in Three-Phase AC Circuits
14) Measurement of Power in Three-Phase Circuits
IV. Technical Conditions of the Kit
- 1. Total Capacity: ≤1.5KVA;
- Dimensions: 1450mm×750mm×1600mm (±200mm);
- Weight: ≤200kg;
- Power Supply: AC3N/380V/50Hz/3A.
V. Package Technical Specifications
- Safety Protection Functions
1) Provides current-type leakage protection, meeting national low-voltage electrical safety standards;
2) Two specifications of experimental leads are used. High-voltage experiments use all-plastic safety experimental leads, eliminating the possibility of electric shock from students touching metal parts. Low-voltage leads use metal-tipped leads; the two types cannot be interlocked. This prevents the possibility of high-voltage current entering low-voltage current.
3) The experimental operation panels are all engraved and silk-screened using high-strength insulating material ≥3mm thick.
4) The power supply and measuring instruments of the experimental device are designed with protection functions such as circuit breaking, open circuit, and over-range protection. - Set Structure
2.1 The set consists of a double-layer aluminum alloy bracket, experimental power supply, measuring instruments, experimental table, experimental modules, experimental wires, and spare parts. The double-layer aluminum alloy bracket can hold AC power supplies, DC power supplies, AC/DC measuring instruments, signal generators, experimental circuits, and other modules. The experimental table is made of iron with a powder-coated finish, the tabletop is made of high-strength density board, and drawers and storage cabinets are located underneath.
2.2 Experimental Hanging Box Modules: Considering the personal safety, convenience, and efficiency of after-sales service for teachers and students, all hanging boxes use non-metallic environmentally friendly insulating materials for their enclosures and panels, avoiding the use of metal materials for enclosures and panels. - Experimental Device Instruments
1) AC Power Supply: Provides a 0-430V/3A three-phase AC adjustable experimental power supply. The power supply is switched via a leakage protection switch, and the power output has dual protection functions via electronic circuitry and fuses, with LED phase loss indication.
2) AC Instruments
AC digital voltmeter (1 unit, accuracy 0.5, measurement range 0-450V)
AC digital current meter (1 unit, accuracy 0.5, measurement range 0-3A)
Power meter (2 units, accuracy 1.0, measurement range 0-450V)
Power factor meter (2 units, accuracy 1.0, measurement range 0-3A)
3) DC Power Supplies
Constant voltage source: 0-30V continuously adjustable, maximum output current: 1A; voltage stability <3%, ripple voltage <1mV, adjustment accuracy 1%; short circuit protection and automatic recovery function, with a 3.5-digit monitoring instrument.
Constant current source: 0-200mA continuously adjustable, three-range switching: 2mA, 20mA, and 200mA; maximum open circuit voltage adjustable from 0.00mA: 30V, open circuit protection, with a 3.5-digit monitoring instrument.
4) Intelligent DC Instruments
DC Voltmeter: Voltage range 0V~750V with automatic switching; five ranges (200mV/2V/20V/200V/750V), accuracy 0.5%. Internal resistance for each range: 750V–941KΩ, 200V–951KΩ, 20V–1040KΩ, 2V–940KΩ, 200mV–940KΩ
DC Ammeter: Current range 0A~3A with automatic switching; four ranges (2mA/20mA/200mA/3V), accuracy 0.5%. Internal resistance for each range: 3A–0.0667Ω, 200mV–1.0667Ω, 20mA–11.0667Ω, 2mA–11.0667Ω
5) Signal Source and Frequency Meter
The signal source can output various waveforms. The output is amplified and equipped with a 6-digit frequency meter.
Output waveforms: Square wave, sine wave, triangle wave, two-pulse, four-pulse, eight-pulse, single-shot.
Output frequency: 3Hz-1MHz continuously adjustable.
Sine wave distortion: ≤1%. Square wave leading edge: ≤100ns.
Triangle wave nonlinearity: Slope change no greater than 3% (100Hz).
Amplitude adjustment range: 0-17Vp-P, with 20dB and 40dB attenuation functions.
Equipped with a 6-digit digital frequency meter, it can be used as a monitoring signal source output and also as an external frequency meter.
Frequency meter accuracy: 0.5 grade; frequency meter test range: 0-1MHz.
6) Fluorescent lamp assembly: Provides fluorescent lamp circuit, starter, and inductive ballast, enabling experiments related to fluorescent lamps. Also includes a 500V withstand voltage capacitor with five adjustable voltage ranges (0.47-10.17μF), enabling experiments related to power factor changes.
7) AC circuit: Provides experimental transformer, mutual inductance coil, and four sets of current sampling sockets.
8) Three-phase AC circuit: Provides three-phase bulb loads, with three independently controllable 25W incandescent lamps per phase.
9) Circuit principle: Provides controlled source VCCS and CCVS circuits, which can be combined to form four types of controlled source experiments.
10) Relay contact control I: The experimental box consists of two 220V control voltage contactors, one thermal relay, and three sets of switches.
11) Relay contact control II: Consists of one 220V control voltage contactor and one time relay. One push-button switch, two limit switches. Consists of one 200Ω/50W diode and one 6A/1000V diode.
12) Three-phase squirrel-cage asynchronous motor (power under 200W)