electrical

"DLWD-ETBE series maintenance electrician skill training system" has obtained ten national patents. It was included in the "Encyclopedia of China's Excellent Practical Patents"; it was selected by the "Hong Kong International Patented Technology Patent Products Expo" as the gold medal patent project with the most potential for transformation; the inventor was included in the book "World Contemporary Excellent Technology Experts"; the inventor was introduced by Included in "Chinese Celebrity Ceremony".

This training system consists of a main control power supply module, a power supply module, an equipment transfer module, an electrical instrument module and a grounding protection module. The main control power module provides two adjustable AC0-450V three-phase five-wire power supplies; the power module can provide AC220V single-phase AC power, AC0-220V adjustable AC power, DC220V DC power, DC0-220V adjustable DC power supply; the equipment adapter module provides three-phase five-pole voltage transformer and arc suppression coil wiring and voltage display; electrical instruments can provide DC voltage and current measurement, AC voltage, current, power, power factor, frequency measurement, The grounding protection module is mainly used for grounding protection test.

This device complies with the content and standards for low-voltage electrical, motor and relay control circuits required by the intermediate maintenance electrician training and assessment skills issued by the Ministry of Labor and Social Security, and can meet the relevant requirements of the vocational skill appraisal for the intermediate maintenance electrician skills assessment Claim. Structural features: 1. The design concept adopts double-sided industrial control electric cabinet, which conforms to the characteristics of electric control, has strong protection function, and the operation part and the control part are arranged separately. 2. There are various instruments on the front of the cabinet door, with three-phase power display area, power supply operation area, and button switch operation area. The back of the cabinet door is equipped with power outlet area and button switch outlet terminals to facilitate the connection with the control part. . 3. There are four experimental hanging boards inside the cabinet, which can be installed independently, and each installation position can be adjusted arbitrarily. It is convenient to operate, easy to replace, expandable functions or develop new training; the selection of operating content is typical and practical. Can conduct secondary innovation experiments; 4. The training cabinet adopts three-phase five-wire access to ensure stable and reliable grounding of the training equipment. 5. The training cabinet can be put into use only with three-phase five-wire AC power supply, and it occupies a small area, saving housing and reducing infrastructure investment; 6. The control circuit and small motor used for skill training can simulate the electric drive system of various machinery in the factory, and can meet the skill training requirements of maintenance electrician's installation, debugging, fault analysis and elimination; 7. The selection of operation content is typical and practical. The training cabinet is equipped with leakage protection, which protects the safety of trainers; 8. All the components are led to the terminals through wires, and students only need to wire on the terminals when wiring, which is beneficial to protect the components;

Three major equipment safety protection systems *The first protection: overload and short circuit protection The incoming power supply of this training system first passes through the residual current operated circuit breaker. The residual current operated circuit breaker has overload, leakage and short-circuit protection functions to protect the circuit and equipment from over-current, overload, leakage and short-circuit during the training process. Thereby protecting the equipment safety of the training system. *Second protection: fire board This training system adopts imported fireproof board material, which has the characteristics of environmental protection, wear resistance, corrosion resistance, high insulation, and high temperature resistance. *The third protection: under the eaves Ordinary computer desks and desks are most easily damaged: the edges and cracks of the PVC seals on the edges of the desks. This training system uses rounded corners as a structure, effectively eliminating the above problems.

1. Comprehensive Abundant training projects, open source code, components with clear screen printing and marking, exposed installation, and intuitive appearance. 2. Modular structure The modules are independent for easy adjustment, increasing and decreasing the modules. The wiring is simple for organizing various training projects and upgrade. 3. Expansion It can choose various main control module（MSP430 MCU series, PIC CU series, AVRCU series, and ARM series) according to the teaching needs. 4. Security Rich man-machine security protection devices such as good short-circuit protection, overload protection, strong and weak electricity using different terminals, equipped with totally enclosed cables, sockets, and emergency stop button.

The system adopts a modular design of independent units, completes with electrical bus and mechanical bus, and finally connects between modules (stations). Each unit module (station) can work independently, and various system units can be connected in various ways. Process requirements, hung on the transmission line with the ring-shaped workpiece transmission system as the mechanical bus, and connected to a variety of different training models through the electrical bus; all the control signals and power signals of the controllers, sensors, and actuators are led to the interface The unit and interface have a specially designed misoperation protection circuit to ensure the safety of man and machine.

This equipment takes flow control as an example to give a comprehensive experimental introduction to the basic principles of control engineering. All components are clearly placed on the vertical front panel. The large-format process diagram is helpful for understanding. The water pump transports the water in the storage tank to the pipe section. The flow rate is measured by the paddle wheel sensor. The transparent float flowmeter enables the control process to be clearly observed. The controller used is the most advanced digital industrial controller. The actuator in the control loop is an electric control valve. The ball valve in the pipeline section allows defined disturbance variables to be generated. The control variable x and the manipulated variable y can be used as analog signals for laboratory jacks. This allows external recording equipment such as plotters or oscilloscopes to be connected.

1. Only single-phase three-wire AC power supply can be put into use, and it occupies a small area and saves space. 2. The power supply has protections such as leakage, overvoltage, overcurrent, and short circuit, which protect the safety of operators. 3. The structure design of the open experiment object makes the experiment object intuitive and easy to understand and observe. 4. The design of the hardware object fully considers the certainty of its mathematical model, which is consistent with theoretical textbooks. 5. The parameters and characteristics of the selected instruments meet the design requirements of the system, and the experimental results are ideal. 6. The detachability of the instruments and meters deepens the students' understanding of engineering instruments and meters, especially the internal principles of the devices. 7. A variety of control signals, a variety of control signals and control methods can be selected according to the experimental project. 8. Separation of water and electricity, that is, the separation of the control system and the execution system, and all the wiring of the execution system shall be treated with waterproof measures. 8. You can do DIY experiments, and the training device can change the experimental objects and connection methods according to user requirements. 9. Man-machine interactive experiment, using configuration software for interactive operation, that is, what you see is what you get, and you can also collect and organize data. 2) Security protection 1. The power supply has protections such as leakage, overvoltage, overcurrent, and short circuit, which protect the safety of trainers. 2. Separation of water and electricity; that is, the control system and the execution system are separated, and all the wiring of the execution system is treated with waterproof measures 3) Configure teaching software 1. Portal programming software

Boiler heating program control protection system 1. The boiler heating liner is equipped with a water level and liquid level protection device. The water level does not reach a certain height, and the control system cannot control the operation of the SCR regulator. 2. The power control switch of the electric heating tube adopts a key switch, which is not convenient for teachers to manage. Power protection measures 1. With current leakage protector. 2. The two-phase power supply is equipped with a fuse to prevent disconnection. Power start-stop control mode; Use the start-stop button to control the contactor to control the start and stop of the power supply. Leakage protection device and safety and safety commitment;  Reliable protection functions of various power supplies and various instruments