DYWTS-01 Crystal Tube DC speed adjustment experiment platform

The device adopts a universal small-capacity thyristor DC speed regulating circuit. The m*n circuit is a single-phase bridge half-controlled structure. The system adopts voltage negative feedback and current positive feedback control, and has a current cutoff negative feedback link and a series differential correction network. This device complies with the latest national "Occupational Standards" and the latest "Practical Tr*ning Equipment Industry Standards" issued by the Ministry of Labor and Social Security of the People's Republic of China, and is suitable for all types of secondary vocational and technical schools. It is used in the teaching tr*ning of labor tr*ning and skill appr*sal units and the intermediate/advanced practical assessment and skill appr*sal of m*ntenance electricians .

The device has expansion interfaces, leakage protection and a special fault setting box. It can provide its own unit to form a single closed-loop DC speed control system with static difference. Fault points can be randomly set according to the requirements of teaching and assessment.

2. Technical performance

1. Input power: single phase (220V+_10%50Hz)

2. AC power supply: single-phase AC220V50Hz

3. Rectified output voltage: DC180V

4. Maximum output current: DC2A

5. Excitation voltage: DC180V

6. Speed ​​adjustment range: D=10

7. The static error rate S is less than or equal to 10%

8. Working environment temperature range -10℃ to +40℃, relative humidity less than 85% (25℃), altitude less than 4000 meters

9. The device capacity is less than 1.5KVA

3. Basic configuration of the device

1. DMO1 power control panel

(1) AC power supply: single-phase ~ 220V power supply (with output short-circuit protection).

(2) DC power supply: 220V/0.5A DC excitation power supply, which provides excitation power for the DC generator.

(3) An isolation transformer is provided to ensure personal safety and also facilitate waveform observation with an oscilloscope.

(3) Measuring instruments

1) An AC voltmeter: indicates input phase voltage, accuracy level 1.0

2) One DC voltmeter: mirror precision pointer type DC voltmeter (±300V, accuracy level 1.0

3) One DC ammeter: precision pointer type DC ammeter with mirror (±2A, accuracy level 1.0)

(4) Fault setting box: no less than 10 fault points can be set.

(5) Personal safety protection system: voltage-type leakage protector, current-type leakage protection device, tr*ning cables and sockets, single-phase three-pole 220V power sockets on both sides of the control panel.

2. DM02 tr*ning table

The tr*ning table is made of iron with a double-layer matte textured spray-plastic structure. The tabletop is made of waterproof, fireproof, and wear-resistant high-density board. It has two large drawers for placing tools, storing parts and materials, etc. It is also equipped with four universal wheels and four fixed adjustment mechanisms for easy movement and fixation.

3. DQ03-1 fixed motor guide r*l, optical code disk speed measurement system and intelligent digital display tachometer

Including high-precision photoelectric encoders, intelligent digital display tachometer and fixed motor guide r*ls, etc. The fixed motor guide r*l has good flatness, no stress deformation, fine processing, good concentricity, and good interchangeability. It can ensure that the concentricity deviation between the motor and the motor does not exceed ±5 wires. The motor operates with low noise and the experimental parameters are typical. It can better meet the experimental requirements.

4． DQ09 DC shunt motor (armature voltage 220V, excitation voltage 220V, rated current 1.2A, speed 1600RPM, power: 185W)

5.DQ07-1 DC generator 240W, 220V (braking device, simulated load unit)

6. Power resistor (900 ohm/150W, 90 ohm/150W)

7. Experimental connection line

Experimental connection lines: According to the characteristics of different experimental projects, two different experimental connection lines are equipped. The high-power part adopts a high-reliability sheathed structure pistol plug connection line (there is no possibility of electric shock), and the inside is made of oxygen-free copper wire. The h*r-thin multi-stranded wire is ultra-soft and covered with a nitrile polyvinyl chloride insulation layer, which has the advantages of softness, high voltage resistance, high strength, anti-hardening, and good toughness. The plug is made of solid copper jacket The beryllium light copper shrapnel makes the contact safe and reliable; the weak current part adopts elastic beryllium light copper exposed structure connecting wire. Both types of wires can only match the sockets with corresponding inner holes, which greatly improves the safety and rationality of the experiment.

4. Practical tr*ning projects that can be completed by this device

1. Familiar with the principles and uses of single-junction transistors

2. Debugging and measurement of single-junction transistor trigger circuit

3. Operation tr*ning of single closed-loop DC speed control system with static difference

4． Measurement of parameters of single closed-loop DC speed control system with static error (with current cutoff negative feedback link)

5. Troubleshooting of Single Closed Loop DC Speed ​​Control System with Static Difference

Hot-selling product: Electrician tr*ning bench