1. Overview
Type GLDG-JExperimental apparatus for electrical and electronic technologyIt is a new type of experimental device launched by the company on the basis of summarizing domestic electrical experimental equipment using mature technology, which integrates the requirements of the current undergraduate and junior college "circuit analysis", "electrical foundation", "electrical engineering", and can also expand the experimental syllabus of "digital circuit", "analog circuit", "motor control", "relay contact control" and "electric power drag", etc., especially suitable for the renewal and transformation of existing experimental equipment in colleges and universities, and new or expanded laboratories for undergraduates and vocational schools. The rapid opening of laboratory courses provides ideal experimental equipment.
2. Characteristics
1. Strong comprehensiveness: It integrates all the experimental projects of the basic courses of electricity in various schools in China.
2. Strong adaptability: the depth and breadth of the experiment can be flexibly adjusted according to the needs, and the popularization and improvement can be organically combined according to the teaching process.
3. Strong completeness: from instrumentation, special power supply to special wires for experimental connection, etc., the performance, accuracy and specifications of instruments are closely combined with the needs of the experiment for configuration.
4. Strong consistency: the selection of experimental devices is reasonable and complete, so that the experimental results of multiple groups have good uniformity, which is convenient for teachers to organize and guide experimental teaching.
5. Strong intuitiveness: this device adopts the structural form of combining the whole and the hanging box, the power supply configuration and instrument are clear at a glance, the task of each experimental hanging box is clear, and the operation and maintenance are simple.
3. Functions
1. This GLDG-J typeExperimental apparatus for electrical and electronic technologyIt can provide AC power supply, low-voltage DC power supply, adjustable constant current source, function signal generator (including frequency meter), controlled source, AC and DC measuring instruments (voltage, current, power factor), and various experimental hanging boxes.
2. Able to complete the superposition, Thevenin, dual-port network, resonance, frequency selection and "Electrician Basics" and "Electrical Engineering".
Experiments on first- and second-order circuits.
3. Able to complete single-phase, three-phase, fluorescent lamp and other experiments in "Circuit Analysis" and "Electrical Engineering".
Fourth, technical performance
1. Input power: three-phase four-wire (or three-phase five-wire) 380V 10% 50Hz.
2. Working environment: temperature -10 +40 relative humidity 85% (25) altitude 4000m.
3. Dimensions: 140 70 153cm.
4. Device capacity: 15kva。
5. Basic experimental projects
1) Basic experiments of electricians.
1. The use of electrical instruments and the calculation of measurement errors.
2. Methods to reduce the measurement error of the instrument.
3. Design and experiment of instrument voltage limit extension circuit.
4. Design and experiment of instrument current limit extension circuit.
5. Mapping of volt-ampere characteristics of known elements.
6. Measurement of potential and voltage and drawing of potential diagram.
7. Verification of Kirchhoff's law and superposition principle.
8. Verification of Thevenin's theorem.
9. Principle and experimental test of equivalent network transformation.
10. Experiment and design of VCVS, VCCS, CCVS, CCCS.
11. Experiments on dual-port networks.
12. Observation and measurement of typical electrical signals.
13. Response and test of RC first-order circuit.
14. Research on the response of second-order dynamic circuits.
15. Determination of impedance characteristics of R, L and C components.
16. Characteristic test of the rotator.
17. The use of oscilloscopes.
18. Test of double-T network.
19. RC frequency selection network characteristics test.
20. R, L, C series resonance.
21. Use the three-table method to measure the equivalent parameters of AC circuits.
22. Experimental test of power factor improvement.
23. Mutual inductance circuit measurement.
24. Test the characteristics of single-phase core transformer.
25. Measurement of voltage and current of three-phase AC circuit.
26. Measurement of three-phase circuit power.
27. Measurement of power factor and phase sequence.
2) Analog circuit training.
1. Transistor common emitter single-tube amplifier.
2. MOSFET amplifier.
3. Negative feedback amplifier.
4. Emitter follower.
5. Difference amplifier.
6. Integrated operational amplifier index test.
7. Basic application of integrated operational amplifier - analog operational circuit.
8. Basic application of integrated operational amplifier - signal processing (active filter).
9. Basic application of integrated operational amplifier - signal processing (voltage comparator).
10. Basic application of integrated operational amplifier - signal processing (waveform generator).
11. RC sine wave oscillator.
12. LC sine wave oscillator.
13. Assembly and debugging of function signal generator.
14. Voltage-controlled oscillator.
15. Low-frequency power amplifier - OTL power amplifier.
16. Low-frequency power amplifier — integrated power amplifier.
17. DC regulated power supply - series transistor regulated power supply.
18. DC regulated power supply - integrated voltage regulator.
19. Meet the practical training of electronic design innovation topics.
3) Digital circuit training.
1. Transistor switch characteristics, limiters and clamps.
2. TTL integrated logic gate logic function and parameter testing.
3. CMOS integrated logic gate logic function and parameter testing.
4. Integrated logic circuit connection and drive.
5. Design and testing of combined logic circuits.
6. Decoder and its application.
7. Data selector and its application.
8. Triggers and their applications.
9. Counters and their applications.
10. Shift registers and their applications.
11. Pulse distributor and its application.
12. Use gate circuit to generate pulse signal - self-excited multivibrator.
13. Monostable flip-flop and Schmitt flip-flop - pulse delay and waveform shaping circuit.
Time-based circuits and their applications.
15. D a, a d converter.
(4) Relay contact and motor experiments.
1. Three-phase squirrel cage asynchronous motor control.
2. Three-phase asynchronous motor jog and self-locking control.
3. Forward and reverse rotation control of three-phase asynchronous motor.
4. Star-delta start control of three-phase asynchronous motor.
Sixth, the device configuration
The device is mainly composed of power supply instruments, control panels, experimental tables, experimental hanging boxes, etc.
1) Power instrument control panel.
The control panel adopts iron double-layer matte dense grain spray structure and aluminum panel. Provide AC power supply, DC power supply, constant current source, controlled source, signal source and various test instruments for experiments. The main control board is described as follows:
Three-phase 0 450V and single-phase 0 250V continuously adjustable AC power supply. Equipped with a three-axis linkage auto-coupling voltage regulator, the specification is 15KVA 0 450V, overcoming many of the shortcomings of the three single-phase regulators consisting of a chain structure or a gear structure. The adjustable AC power output is equipped with over-current protection technology, which can automatically protect the phase-to-phase, inter-line overcurrent and direct short circuit, which overcomes the trouble caused by changing the fuse (and overcomes the slow response speed of peers and the inability to reliably protect). It is equipped with three pointer AC voltmeters, which can indicate the three-phase grid voltage and the three-phase voltage regulation output voltage respectively through the transfer switch; Provide 1 iron core transformer, the specification is 50VA, 36V 220V, and the primary and secondary sides are equipped with current sockets.
2) Experimental hanging box.
1. DDZ-30 DC adjustable regulated power supply.
Provide dual adjustment range 0 30V continuously adjustable, maximum output current: 1A; The voltage stability is <3%, the ripple voltage is <1mV, and the adjustment accuracy is 1%; It has short-circuit protection and auto-recovery function, and has a 3-and-a-half-digit monitoring meter.
2. DDZ-31 constant current source.
It provides a continuous adjustable constant current source of 0 30mA, load stability of 5 10-4, rated change rate of 10-4, equipped with digital DC milliampere meter to indicate output current, and has the function of output open circuit and short circuit protection.
3. DDZ-32 DC and AC power supply.
AC power supply: provide one power supply with 0V, 6V, 10V and 14V taps, and two 17V power supplies with center taps, each power supply has the function of automatic recovery of short-circuit protection;
DC power supply: 5V 05a，±12v/0.There are four 5A regulated power supplies, all of which have short-circuit protection and automatic recovery function.
4. DDZ-33 meter modification training.
Completed the meter modification training (equipped with a mirror pointer precision milliampere meter), volt-ampere characteristic experiments, etc.
5. DDZ-34 controlled source training.
Experimental modules such as fluidic voltage source CCVS, voltage controlled current source VCCS, voltage controlled voltage source VCVS, fluidic current source CCCS, rotary converter and negative impedance converter are provided. The four groups of controlled sources, the rotator, and the negative impedance converter all use standard net symbols.
6. DDZ-40 AC meter.
1 AC voltmeter: ARM system design, flash not less than 64K, RAM not less than 20K, measurement range: 0 500V. The measuring range is automatically switched, and the measurement accuracy is 0Level 5; Four-digit display, with over-range protection function;
1 AC ammeter (industrial control integrated design): ARM system design, flash is not less than 64K, RAM is not less than 20K, and the measurement range: 0 5A. The measuring range is automatically switched, and the measurement accuracy is 0Level 5; Four-digit display, with over-range protection function;
1 multi-function test table (industrial control integrated design): ARM system design, flash is not less than 64K, RAM is not less than 20K, measurement range: 0 500V, 0 5A, can measure the voltage, current, active power, reactive power, apparent power, power factor, etc. of the circuit. The power measurement accuracy is 1Class 0, power factor measurement range 03～1.0, can automatically determine the nature of the load (inductive display "L", capacitive display "C", pure resistance does not display).
7. DDZ-41 DC meter.
1 DC voltmeter (industrial control integrated design): ARM system design, flash is not less than 64K, RAM is not less than 20K, and the measurement range: 0 200V. The measuring range is automatically switched, and the measurement accuracy is 0Level 5; Four-digit display, with over-range protection function;
1 DC milliampere meter (industrial control integrated design): Arm system design, flash is not less than 64K, RAM is not less than 20K, and the measurement range: 0 2000mA. The measuring range is automatically switched, and the measurement accuracy is 0Level 5; Four-digit display, with over-range protection function;
8. DDZ-10 circuit basic training (1).
It provides Kirchhoff's law (three typical fault points can be set), superposition principle (three typical fault points can be set), R, L, C series resonant circuit (L with hollow inductance), R and C series and parallel frequency selection circuit.
9. DDZ-11 circuit basic training (2).
Experiments such as Thevenin's theorem, Norton's theorem, two-port network, reciprocity theorem, first-order and second-order dynamic circuits are provided.
10. DDZ-12 circuit basic training (3).
Provide common bulbs, voltage regulators, potentiometers, resistance boxes, etc. to meet the practical training.
11. DDZ-13 AC circuit training (1).
Provide high-voltage capacitors (1UF 500V, 2UF 500V, 4UF 500V) to meet the needs of practical training, and the fluorescent lamp experimental device is equipped with rectifier, starter, etc.
12. DDZ-14 AC circuit training (2).
Provide single-phase and three-phase load circuits to meet the needs of practical training. The load is three completely independent lamp groups, which can be connected into Y or two kinds of three-phase load lines, each lamp group is provided with two incandescent lamp gong sockets in parallel (each group is provided with two switches to control the on/off of two load parallel branches), six incandescent lamps below 60W can be plugged in, and each lamp group is equipped with a current socket; The primary and secondary sides are equipped with fuses and current sockets.
13. DDZ-21 modular electrical experiment.
Triodes, diodes, regulators, resistors, single junction transistors, buzzers, capacitors, etc. are available. The training module is also equipped with a single-tube negative feedback two-stage amplifier, emitter follower, RC series-parallel frequency selection network oscillator, difference amplifier and low-frequency OTL power amplifier, a total of five fixed circuit training boards.
14. DDZ-22 digital electrical experiment.
Provides a four-digit decimal decoding display, an 8-bit logic level switch, an 8-bit level indicator, a three-state logic pen, and a pulse signal source (positive and negative outputs with a single pulse and frequency of 0.).5Hz 300kHz continuously adjustable counting pulse source one each), the training box is equipped with a fixed circuit board, and is equipped with some high-reliability round foot integrated circuit sockets (8P, 14P, 16P, 28P, 40P several).
15. DDZ-50 relay contact control (1).
Provide 2 AC contactors (coil voltage 220V) to meet the experimental requirements, and lead the working terminal of the device to the panel for experimental wiring, and the working state of the device is indicated by light-emitting diodes.
16. DDZ-51 relay contact control (2).
Provide 1 AC contactor (coil voltage 220V) and 1 time relay (coil voltage 220V) to meet the experimental requirements, and lead the working terminal of the device to the panel for experimental wiring, and the working status of the device is indicated by a light-emitting diode.
17. DDZ-52 button module.
Provide 1 thermal relay to meet the experimental requirements, one button with light (one yellow, one green, one red), and lead the working terminal of each device to the panel for experimental wiring.
18. DQ20-1 three-phase squirrel cage asynchronous motor (380V, Y).
The terminal is led to the fixed terminal.
3) Laboratory table.
The laboratory table is a high-grade aluminum profile structure, and the desktop is a fireproof, waterproof and wear-resistant high-density board.
4) Experimental connection line.