DYDG-181G General Electrician, Electronics, Electric Drag Train Platform

The general electrician , electronics , and electric drag laboratory complete set of equipment provides courses such as "Electrical Experiment", "Electronic Experiment", and "Electric Drag Experiment".

Electrician, electronics, and electric mop experimental bench students can clearly and intuitively understand the circuit structure and experimental principles.

The purpose of teaching electrical engineering, electronics, and electric mop laboratory equipment is to enable students to receive more systematic education and tr*ning in basic knowledge, basic methods, and basic skills in basic circuit experiments, and to deepen and consolidate their understanding of the basic concepts and laws of circuits. Cultivate students with preliminary experimental abilities, good experimental habits and rigorous scientific attitude and style, laying a solid foundation for subsequent experimental courses and scientific research work on circuit fundamentals.

1. Product features:

General Electrical and Electronic Technology and Electric Tow Test Bench The test bench has relatively complete safety protection measures and relatively complete functions (see the structure introduction of the experimental bench for det*ls). The center of the experimental table is equipped with a universal nine-hole plug-in board. The m*n body of the nine-hole plug-in board is made of ABS injection molding. There are nine holes on the surface to form a group of interconnected jacks. There are 126 groups embedded in the nine-hole plug-in board. Copper nine-hole one-piece molded insert. The weak current module in the experiment must be a single module with an independently packaged transparent component box. The component box can be used with a nine-hole plug-in board to freely build a combined circuit like building blocks. The component box body is transparent and the internal components are intuitive. Good, the printed circuit diagram on the box cover is scratch-resistant and wear-resistant, and the symbols are beautiful and clear. The component box body and lid adopt a more scientific clamping structure, which is convenient for m*ntenance, disassembly and assembly. The components are placed in the storage cabinet under the experimental table, which greatly improves the management level and planning level, and greatly reduces the teacher's experimental preparation work.

2. Electrical and electronic technology and electric drag experimental device structure

The general electrical and electronic technology and electric motive test bench consists of a power control box, an experimental table (equipped with a nine-hole plug-in board), an electrical control experimental hanging box, an experimental hanging box bracket, a mobile low cabinet, an oscilloscope stand, a transparent innovative experimental module, Composed of student benches, etc. The experimental device bracket and experimental table can be combined and disassembled. The bracket is integrated with the table legs and has an aluminum alloy structure; the electrical control experimental hanging box and each experimental module can be freely combined for experiments according to experimental needs.

(1) Power supply control box structure:

1. Power control box shell size: 146cm×20cm×25cm       

2. Three phase fuse

3. Three-phase power input indicators

4. M*n switch: m*n switch of the power supply of the experimental bench, with leakage and overload protection

5. Test button: Test the leakage function of the leakage switch

6. Power input indicator 1

7. 3 power output indicators (red, green and yellow)

8. AC voltmeter: Indicates output line voltage

9. Voltage conversion switch: Used in conjunction with a voltmeter to monitor the size and symmetry of the output line voltage

10. 5 terminal blocks: unit A three-phase four-wire and ground wire output

11. Ammeter W phase current output indication

12. O/I switch: three-phase four-wire power output control (improving safety factor)

13. 2 terminal blocks: Unit B AC low-voltage power output  

14. Electric meter (2A): Unit B AC current indication        

15. Knob: Unit B 3-24V AC low voltage selection output  

16. Switch: C unit dual-channel DC regulated power supply switch    

17. Knob: C unit dual-channel I channel steady flow adjustment         

18. Knob: C unit dual-channel II channel steady flow adjustment        

19. 2 terminal blocks: Unit C Ⅰ DC regulated output  

20. Insurance holder: C unit dual-channel regulated power supply fuse      

twenty one. 4 electric meters: dual-channel regulated power supply voltage and current indication

twenty two. Terminal block: D unit DC 5V regulated output

twenty three. Electric meter: D unit current 0.5V output indication       

twenty four. Switch 1: Controls various low-voltage alternating current and signal sources

25． Switch 2: Control the AC and DC voltage-regulated power supply of unit E     

26. Electric meter: E unit AC voltage output indication        

27． 4 terminal blocks: E unit AC and DC output ports

28. Knob: E unit 0~240V voltage adjustment

29. Socket: G unit 2-way 220V output socket

30. Knob: Audio power amplifier volume adjustment

31. 2 terminal blocks: audio signal input

32. Button: Single pulse enable switch

33． 3 terminal blocks: single pulse output port

34. Power output function generator/frequency meter

(2) Experimental table structure:

The specifications of the experimental table are 1600 (length) * 700 (width) * 1500 (height). The m*n structure of the experimental table is made of high-performance surface oxidized aluminum profiles and one-time aluminum die-cast frame connecting components. The connecting components adopt die-casting molding process (non-welded). Process), it is machined, shot blasted, sandblasted, and surface electrostatic sprayed. It is easy and fast to install, and users can DIY it by themselves. The uprights of the table body are made of industrial aluminum profile molding technology, with surface oxidation treatment. The cross-sectional size is 70×70mm, with grooves on all sides, the width of the groove is about 8mm, and the ends are equipped with plastic plugs. The desktop is made of 25mm E1 grade melamine decorative panel. There is a support frame under the desktop panel with a bearing capacity of not less than 300kg. Equipped with a storage cabinet to store components and tools. The bottom of the storage cabinet has 4 high-strength universal brakeable PU casters for easy movement. The overall experimental device is simple but not simple, high-end and elegant, in line with modern product aesthetics and development trends.

The experimental table has two seats. The center of the experimental table is equipped with a universal nine-hole plug-in board (size: 35×90cm). The m*n body of the nine-hole plug-in board is made of ABS injection molding. The surface is covered with nine holes to form a group of interconnected ones. Jack, nine-hole** plug-in board is embedded with 126 sets of copper nine-hole integrated inserts (a total of 1134 holes). The weak current module in the experiment must be a single module with an independently packaged transparent component box. The component box can be used with a nine-hole plug-in board to freely build a combined circuit like building blocks; the component box body is transparent and the internal components are intuitive Good, the printed circuit diagram on the box cover is scratch-resistant and wear-resistant, and the symbols are beautiful and clear. The component box body and lid adopt a more scientific clamping structure, which is convenient for m*ntenance, disassembly and assembly. Each table is equipped with a rubber plate to protect the universal bottom plate and desktop (if motors, welding, etc. need to be placed on the table).

The two legs behind the experimental table extend upward and are equipped with two specially-molded aluminum profile beams to form an electrical experiment hanging box bracket. The bracket is matched with the electrical control experiment hanging box, making it easy to move up and down and shift left and right.

(3) Transparent component module: The component box body is transparent, the components inside are intuitive, the printed circuit diagram on the cover is scratch-resistant and wear-resistant, and the symbols are beautiful and clear. The component box body and lid adopt a more scientific clamping structure, which is convenient for m*ntenance, disassembly and assembly.

General electrician, electronics, and electric mop laboratory equipment (Figure 3)

(4) Electrical control experiment hanging box: aluminum panel, back cover made of die-cast aluminum profiles and injection-molded plastic parts. The electrical component wiring points have all been led to safety sockets, making experimental wiring convenient, safe and fast.

1. Electrical experiment hanging box 1: 2 AC contactors

2. Electrical experiment hanging box 2: 1 AC contactor, 1 thermal relay

3. Electrical experiment hanging box three: 1 time relay, 1 red, yellow and green buttons each

4. Electrical experiment hanging box four: 4 travel switches, 1 AC contactor, 1 button, 2 resistors (510Ω/25W)

5. Lamp holder load hanging box: 9 lamp holders and corresponding control switches, bulb users must prepare by themselves

(5) 2 three-intersection motors : 380V/180W, aluminum casing.

General electrician, electronics, and electric mop laboratory equipment (Figure 4)

(6) Student stool

1. The stool legs are made of 30×30×1.2mm square tubes;

2. The drawing tube adopts 30×30×1.2mm square tube;

3. The stool surface is made of 240×340×25mm particleboard with wood gr*n paper, and the height of the stool is 40cm. The stool surface and the metal stool frame are fixed with large flat-head anti-scratch screws and anti-retreat nuts;

4. Anti-rust treatment: All metal parts need to be pickled, phosphated, and surface rust-removed. High-voltage electrostatic spraying and high-temperature baking are used. They require strong adhesion, anti-oxidation, no peeling, smooth and beautiful, and metal tables Body color is gray.

3. M*n technical indicators of the experimental bench:

1. Input working power: three-phase four-wire

2.Output power:

Unit A: three-phase four-wire

Unit B: AC 3, 6, 9, 12, 15, 18, 24V

Unit C: Dual-channel constant-current regulated power supply (with overload and short-circuit protection functions), both output voltages are 0~30V, built-in relay automatically shifts, continuously adjusted by a multi-turn potentiometer, easy to use, output ** The current is 2A and has a preset current limiting protection function.

Voltage stability: <10-2 Load stability: <10-2 Ripple voltage: <5mv

Unit D: DC regulated voltage 5V, current 0.5A

Unit E: AC and DC voltage continuously adjustable from 0 to 240V, current 2A

Unit F: 2 sets of 220V voltage output sockets for external instruments.

3. Single pulse source: a p*r of positive and negative pulses can be output each time

4. Power output function generator/frequency meter:

(1) Use direct digital frequency synthesis (DDS) to generate high-precision sine waves, square waves and triangle waves. Use large-screen LCD to display output frequency, waveform, and attenuation value.

(2) Sine wave output amplitude ≥10V, output impedance 50Ω, distortion <1% (0.1HZ-- 1KHz).

(3) Frequency range: 0.1HZ~3MHz, use the keyboard to directly input numbers to set the frequency.

(4) The output amplitude is adjusted by a potentiometer, and the sine wave output has 20db and 40db attenuation.

(5) Square wave duty cycle is adjustable, adjustment range: 1%-99% adjustment; square wave and triangle wave adopt TTL level output.

(6) Frequency meter has a maximum measurement range of 100MHz and automatically shifts gears.

5. Audio power amplifier: The input audio voltage is not less than 10mv, the output power is not less than 1W, the volume is adjustable, and there is a speaker inside, which is used for amplifier circuit amplification and can also be used as a signal tracing instrument.

6. Insulation resistance: >5MΩ

7. Leakage protection: leakage action current ≤30mA

5. Experimental projects:

(1) Electrical experiment

1. Use of electrical measuring instruments

2. Identification and detection of commonly used components　　　　　　  

3. Volt-ampere characteristics of linear components and nonlinear components    

4. External characteristics of power supply　　　　　　　        

5. Measurement of potential value and voltage value　　　　      

6. Range extension for ammeters and voltmeters

7. Verification of Kirchhoff's Laws　　　　       

8. Verification of Lenz's Law

9. Verification of the superposition principle and reciprocity theorem

10. Verification of Thevenin's Theorem and Norton's Theorem

11. Equivalent transformation of voltage source and current source

12. Research on controlled source characteristics

13. First order circuit experiment

14. Transition process of second-order circuit

15. Study the characteristics of LC components in DC and AC circuits

16. Conditions for load to obt*n maximum power

17. Measurement of AC circuit parameters

18. Characteristics of RLC components in sinusoidal AC circuits

19. RL and RC series circuit experiments

20. RLC series resonant circuit

twenty one. Fluorescent lamp circuit connection and power factor improvement

twenty two. Star and delta connection of three-phase load

twenty three. Three-phase circuit and power measurement

twenty four. Research on RC Frequency Selective Network

25． Two-port network research

26. Single phase transformer experiment　　　　　　        

27． Mutual inductance circuit experiment

The following circuit experiments can also be completed using the components of the above 27 experiments.

1. ***Simple circuit

2. Selection of potentials and reference points at each point in the circuit

3. series connection of resistors

4. Resistors in parallel

5. Mixed connection of resistors

6. resistor divider circuit

7. Ohm's law for the whole circuit

8. Bridge application and balancing conditions

9. node voltage method

10. loop voltage method　　　　　　　         

11. branch current method

12. RCL parallel circuit　　　　 　　　     

13. series circuit　　　　　　　　　       

14. Transformer structure and working principle　　　　　   

15. Kirchhoff's law

16. Kirchhoff's second law

17. Fluorescent lamp circuit principle　　              

18. Expand the voltmeter range

19. Expand ammeter range                      

20. Transition process of RC circuit

twenty one. RL transition process

twenty two. series circuit of capacitors

twenty three. capacitor parallel circuit

twenty four. Capacitor charging and discharging

25． The role of capacitors in AC and DC

26. Movement of bar magnet in coil

27． Mixed connection of capacitors

28. Pure resistance, inductance, capacitance circuits

29. Magnetic coupling coil sequence

30. Counter-series of magnetically coupled coils

31. How an ohmmeter works

32. Double switch two ground control

33． Use an oscilloscope to observe the hysteresis loop

34. Magnetic Circuit Ohm's Law

35. The mutual inductance of the two coils and the same terminal

36. mutual inductance coupling

37. How to improve power factor

38． Measurement of single-phase circuit power

39. Radio recorder power circuit

40. filter circuit

41. The relationship between resistance and temperature: Use voltammetry to measure the resistance of the filament at different voltages.

(2) Electronic experiments

1. Characteristics and detection of crystal diodes 　　　　　　        

2. Transistor input and output characteristics           

3. Low frequency small signal voltage amplifier             

4. Directly coupled two-stage amplifier               

5. RC coupled two-stage amplifier                

6. The impact of negative feedback on amplifier performance         

7. Transformer coupled push-pull power amplifier              

8. Complementary Symmetrical Push-Pull Power Amplifier (OTL)      

9. Single phase half wave rectifier                     

10. Single phase full wave rectification                      

11. Single phase bridge rectifier                      

12. Single-phase bridge rectifier filter                  

13. Single junction transistor characteristics                                       

14. Unijunction transistor trigger circuit              

15. Simple test of thyristor and controllable rectifier circuit                    

16. Field effect tube test                    

17. Series regulated voltage                  

18. Research on differential amplifier circuit                       

19. Testing of integrated operational amplifier parameters              

20. Integrated op amp subtraction circuit               

twenty one. Integrated op amp adding circuit                               

twenty two. Integrated operational amplifier integrating circuit

twenty three. Integrated operational amplifier differential circuit

twenty four. Integrated Op Amp Wien Sine Wave Oscillator

25． Capacitive three-point oscillator

26. Inductive three-point oscillator

27． Integrated voltage stabilizing circuit

28. Astable circuits (multivibrators)

29. Schmitt trigger

30. Integrated AND gate logic function test

31. Integrated NOT gate logic function test

32. Integrated OR gate logic function test

33． Integrated NAND gate logic function test

34. Testing of CMOS gate circuits

35. Basic RS flip-flop

36. JK flip-flop

37. D flip-flop

38. Application of 555 time base circuit (square wave generator)

39. binary decimal counter

40. Binary decimal 8421 decoder

41. Adder

42. subtractor

43. Constructing a Monostable Flip-Flop Using Integrated NAND Gates

44. combinational logic circuit

Surface experiments can also be completed using the above 44 experimental components.

45. PN junction unidirectional conductive characteristics

46. Measurement circuit of three-power ICBO

47． Measurement circuit of triode ICEO

48. Transistor current amplification    

49. VA characteristics of triodes             

50. Single-stage small-signal voltage amplification with load

51. Voltage negative feedback bias circuit

52. Voltage-divided current negative feedback bias circuit

53. Stabilizing the operating point with a thermistor            

54. Using diodes to stabilize the operating point              

55. Analyze the influence of Ce on low frequency characteristics         

56. Common base amplifier experimental circuit         　   

57． Common collector amplification experimental circuit             

58. Common source basic amplifier circuit              

59. Field effect tube self-cont*ned bias amplifier circuit

60. Field effect transistor voltage dividing self-bias circuit

61． Field effect transistor common dr*n circuit

62． Field effect transistor common gate circuit

63. Single-tube resistance-capacitance amplifier circuit                

64． Basic DC amplifier circuit                

65． Use a resistor to increase the emitter potential of the subsequent stage        

66. Use a voltage regulator tube to increase the emitter potential of the rear stage      

67. Transformer coupled amplifier circuit              

68. Class A power amplifier circuit                 

69. Class B power amplifier circuit               

70. Series current negative feedback                  

71. Series voltage negative feedback circuit              

72. Parallel voltage negative feedback circuit              

73. Parallel current negative feedback circuit              

74. Negative feedback in two-stage amplifier circuit          

75. Emitter output circuit                    

76. Bootstrap emitter output circuit

77. Use capacitors to attenuate high-frequency voltages

78. Use negative feedback to eliminate self-oscillation

79. battery monitoring circuit

80. Field effect transistors and transistors form an amplifier circuit

81． PNP-NPN direct coupling amplifier circuit

82． Common base cascode amplifier circuit

83． Transistor switching function

84． Liquid level photoelectric control

85． Simple temperature control circuit

86. Analog light-controlled simple street light automatic switch circuit

87． RC Phase Shift Oscillator

88. Double T frequency selection network

89． Oscillator composed of double T frequency selective network

90. Transformer feedback oscillation circuit

91. Field effect transistor transformer feedback oscillation circuit

92． Anti-theft alarm circuit

93. Series crystal oscillator circuit

94. complementary audio oscillator

95. alarm sounder

96． Music doorbell circuit

97． Electronic alarm circuit

98. The basic form of differential amplifier circuit

99. Electronic doorbell circuit

100. Quasi-complementary symmetrical circuit

101. Three-tube OTL complementary symmetrical circuit

102. Long t*l differential amplifier circuit

103. Differential input single-ended output

104. Single-ended input double-ended output

105． Single-ended input single-ended output

106. Dual power supply long t*l differential amplifier circuit

107. Differential amplifier experimental circuit

108. Differential amplifier circuit measures with constant current source

109. Ironic analysis of single-ended output differential amplifier circuit

110． flasher circuit

111． Basic connection method of operational amplifier

112． Current differential operational amplifier is used as AC proportional amplification

113. Simple measurement method of Vos

114. A simple measurement method for Aos

115． A simple measurement method of Aod

116． Simple test of common mode rejection ratio Cmrr          

117． **Simple test of common mode input voltage UIcm

118. Yopp's simple test

119. SR measurement method

120. Basic non-inverting amplification connection method

121. LC oscillator composed of op amp

122. Electric heating cup temperature adjustment circuit

123． Lead to the reverse end input zero adjustment measure         

124. Lead to the same direction end and input the zero adjustment instruction.

125. In order to prevent the electric value from being too large,         

126. Using the base current of the transistor to achieve temperature compensation of Ios                    

127． Utilizing T-shaped network to improve equivalent feedback resistance  

128. Measures to make the complementary tube work in Category A and B to expand the output current                      

129. Measures to be taken when correcting capacitive loads

130. Inverting input protection measures

131. Non-inverting input protection measures  　　　       

132． Use voltage regulator tubes to protect devices   

133. Protection ag*nst wrong polarity of power supply  　　　     

134. Instantaneous overvoltage protection when power is on　　　　   

135. Diode detection circuit     　　　 　   

136. Circuit principle of measuring temperature using the temperature coefficient of PN junction                     

137. Dual diode limiter

138. Basic circuit of inverting op amp   　　　      

139. Variable ratio magnification      　　　       

140. Basic circuit of non-inverting op amp  　　　       

141． Voltage/current conversion circuit 　　　        

142． Current/voltage conversion circuit

143. voltage follower       　　　        

144． Differential amplifier basic circuit  　　　       

145. The differential output of the operational amplifier　　　     

146. Inverted input sum operation    　　　     

147. In-phase input summation operation

148. Two-ended input sum operation

149. Basic integrating circuit

150. EG test leakage resistance p*r integral operation circuit

151． Measures to improve the integration time constant

152. Fast integrating circuit

153. Simulate first-order differential equation circuits

154. Simulate second-order differential equation circuits

155. basic differential circuit

156. Practical Differential Circuits

157. Using indirect methods to obt*n approximate differentials

158. Basic logarithmic operation circuit

159. Using the logarithmic characteristics of transistors to form a logarithmic operation circuit

160. Basic circuit of antilog amplification

161. Vo is proportional to the VxVy circuit

162. Simple zero-crossing comparison circuit

163. Comparator circuit with hysteresis characteristics

164. Double limit comparison circuit

165. Using diodes as upper limit detection amplitude selection circuit

166. Double limit three-state comparison circuit

167. Lower limit detection amplitude selection circuit

168. Basic sampling protection circuit

169. RC passive network terminal low-pass filter circuit

170. The filter circuit is connected to the non-inverting input terminal of the component

171. The filter circuit is connected to the inverting input of the component

172. Simple second-order RC filter circuit

173. Typical RC active filter circuit

174. Two-stage active filter circuit

175. Multi-channel feedback secondary active filter circuit

176. Typical second-order high-pass active filter circuit

177. Basic bandpass filter circuit

178. Typical bandpass filter circuit

179． Band stop filter composed of double T network

180. Output limiting inverter

181． Practical Difference Op Amp

182. Square wave oscillator circuit

183. Resistor-capacitor phase shift trigger circuit

184. Electric heating mattress temperature control device

185. Adjustable width rectangular wave generator

186. Simple sawtooth wave generator            

187. Amplitude and frequency adjustable sawtooth wave generator         

188． Commonly used drawing circuits for single-phase bridge rectifiers       

189. The maximum reverse peak voltage of the full-wave rectifier circuit

190. Capacitor filter circuit                    

191. Capacitive filter with resistive load　　 　　　  

192． Full wave rectifier capacitor filter circuit

193． RC filter circuit

194. Multi-stage RC filter circuit       　  

195. Basic LC filter circuit      　　　  

196． T-shaped filter circuit           　　　   

197. Double voltage rectifier circuit        　　　   

198. Triple voltage rectifier circuit        　　　   

199. Basic voltage regulator circuit     　　   

200. Basic regulating tube voltage stabilizing circuit    　　　   

201. Voltage stabilizing circuit with amplification link 　　　  

202. Adjustment tube current stabilizing circuit  　　　         

203． electronic filter       　　　        

204. Series voltage stabilizing circuit

205. Parallel voltage stabilizing circuit

206. electronic hypnosis device　　　      

207. Three-terminal integrated voltage stabilizing circuit

208． Positive power output adjustable integrated voltage stabilizing circuit

209. Single-phase full-wave controllable rectification

210． Silicon voltage regulator circuit

211. Single-phase half-wave controllable rectification

212． Single-phase bridge semi-controlled rectifier

213. Principle of silicon rectifier for charging

214. Effect of inductive load on thyristor

215. Thyristor trigger conduction test

216. Back electromotive force load thyristor circuit

217. Simple electronic voltage regulation circuit

218. Test the single-junction tube partial pressure ratio n

219. Single junction oscillator circuit

220. Single junction tube trigger application circuit

221. Diode AND gate circuit

222. Transistor "OR" gate circuit

223. visualization with logic

224. or logical visualization

225. illogical visualization

226. Transistor "NOT" Gate

227. Transistor NAND gate

228． Transistor "NOR" gate

229. Three-barrel bistable circuit

230. triode monostable circuit

231. triode multivibrator circuit

232． Set trigger circuit

233. emitter coupled bistable

234. Symmetric multivibrator

235. ring multivibrator

236． Differential monostable circuit

237. Integrated Schmitt circuit

238. Square wave generator

239. single pulse circuit

240. continuous pulse generator

(3) Electric drag experiment

1. Use and starting of three-phase asynchronous motor

2. Three-phase motor contactor inching forward control circuit

3. The three-phase motor has a self-locking forward control circuit

4. The three-phase motor has a forward rotation control circuit with over-finding protection.

5. Three-phase motor contactor interlocking forward and reverse control circuit

6. Three-phase motor button interlocking forward and reverse control circuit

7. Three-phase motor button contactor composite interlocking control circuit

8. Three-phase motor contactor control Y/△ reduced voltage starting

9. Three-phase motor time relay control Y/△ step-down starting

10. Workbench automatic round-trip control circuit

11. Three-phase asynchronous motor reverse braking control circuit

12. Three-phase asynchronous motor control in multiple places

13. Electric hoist circuit m*ntenance control circuit