Loop structure Here, 6RA24 constitutes an armature reverse and magnetic field constant 16RA24 features and structure 6RA24 is a new generation of all-digital DC drive from Siemens, using thyristor control technology to meet the requirements of four-quadrant operation. Hardware structure and features 6RA24 all-digital rectification device adopts modular structure. This structure is easy to maintain in every part. The electronic component box of the device can be equipped with main electronic board and additional boards that may be used, such as communication templates and process templates. Therefore, the device has good expandability and facilitates maintenance and replacement of the electronic board of the device.

The external signal connection (switch input/output, analog input j output and pulse signal, etc.) is realized by the isolated terminals which are isolated from each other, and the signal exchange between the main electronic board and the terminal block is connected by a flat cable; the main electronic The connection between the board and the pulse board is also connected by a flat cable for easy replacement and maintenance. The operation of the system is realized by three buttons on the main electronic board and five seven-segment digital tubes. The operation is simple and easy to learn. With these buttons, you can also operate an additional template such as a graphic board to set parameters.

RA24 also has a powerful ability to pass through, and provides PROFIBUS-DP and FMS network connection functions, which makes it possible to network with many other controllers, because PROFIBUS-DP is the recommended standard for implementation in Europe__"Industry Agreement Software structure and features The system software of 6RA24 adopts program modular structure, object-oriented and user, graphically symbolizes its various internal connection and control relationships. Each program function block is configured by setting its parameters and suitable for various purposes. The application of RA24 is divided into connection quantity, soft switch and parameter group. The user can connect various external signals to input and output through the connection quantity. It can also output various parameters and process variables in the program.

Control loop speed reference and speed feedback We use photoelectric encoder as the speed feedback signal of 6RA24, set P083 2 to select this connection, its adjustment precision â–³. 0.006%, so it can fully meet the requirements of the mine hoist speed map. The speed is given by a technology that is given by the advanced stroke speed, so that the hoist can run at any speed, and the creep distance can be changed to improve the running efficiency. As shown, the tweaking column edits Ye Wenlin given the obscurity curve 6RA24 speed given pulse code 4 claw 5 Since the mine hoisting wire rope is an elastic body, it will generate elastic vibration under the action of external force. The traditional rectangular acceleration curve will have a large amplitude oscillation when the hoist is accelerating, and the oscillation acceleration is generally twice the acceleration of the hoist, which will make the downhole workers feel very uncomfortable, Xiao, 0 about sinusoidal acceleration Research on the application of curve in cage lifting Li Yuzhen 1 Liu Hongbin 2 Beijing Institute of Carbon Design Beijing 1000112 CITIC Heavy Machinery Co., Ltd. 1 sinusoidal acceleration curve and characteristic analysis The sinusoidal acceleration curve is shown in Figure l.

It has been found that the use of a sinusoidal acceleration curve results in better impact limiting characteristics. This paper deals with the acceleration function of sinusoidal acceleration characteristics. The full acceleration phase is operated by the half-wave characteristic of the sinusoidal function throughout the acceleration phase. It is 1.57 times the acceleration of the rectangle.

The realization of communication We use 6RA24 additional CS51 function template to realize the domestic power tube. After careful study and study of the template of the 6RA24 all-digital DC drive. The 6RA24 electronic board was modified, and the thyristor trigger signal line was separately drawn, and the voltage test line was re-introduced to meet the 6RA24 detection of the thyristor and armature voltage without affecting the use of the 6RA24. The field application proves that the method is feasible, saves a lot of cost, reduces the user's investment, and at the same time improves the running performance of the machine in full compliance with the speed map and the force map.

Industrial operation hoist DC drive, the speed curve is S-shaped, smooth transition between start and brake, small impact on mechanical equipment, and operating characteristics. After the system parameters are debugged by software, they are permanently set at one time. There is no parameter drift problem, and the repeatability is good and the reliability is high. The data exchange network of the upper level control computer realizes the speed reference of the transmission device and the exchange of internal parameter information, and also realizes the mutual monitoring and comparison function of the speed and position between the transmission device and the PLC control device, and improves The operation of the mine hoist, reliability and safety.

(Finish)

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