Direct-current transmission control system for 285 extra-heavy high-speed bar modular rolling mill

Abstract

The utility model discloses a direct-current transmission control system for a 285 extra-heavy high-speed bar modular rolling mill, which is characterized by comprising a direct-current motor, a domestic high-power thyristor, a driving controller and a primary PLC (Programmable Logic Controller) device, the direct current motor is electrically connected with the domestic high-power thyristor, the domestic high-power thyristor is electrically connected with the driving controller, and the driving controller is in communication connection with the primary PLC device. The direct current transmission control system provided by the utility model has the advantages of low cost and high response speed.

Description

Technical Field

[0001] The utility model relates to the field of electrical automatic control, in particular to a DC drive control system for a 285 ultra-heavy high-speed bar module rolling mill. Background Art

[0002] In the existing technology, the transmission control system of the 285mm ultra-heavy high-speed bar module rolling mill usually adopts an AC transmission control system. The AC transmission control system is a system that uses an AC motor as a power source and accurately controls the running speed, torque and position of the motor through an AC frequency converter. It is widely used in various industrial fields, including manufacturing, energy industry, and transportation. The advantages of the AC transmission control system are its maturity and wide availability, but there are also some problems and shortcomings: First, due to the relatively slow response speed of the AC motor, the AC transmission control system may have insufficient dynamic response during high-speed rolling, resulting in low rolling energy efficiency. Secondly, although the AC transmission control system is currently widely used in industrial applications, its cost is relatively high, especially when applied to large ultra-heavy rolling mills. Therefore, a low-cost, high-response speed AC control system is needed. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a DC drive control system for a 285 ultra-heavy high-speed bar module rolling mill, which has the advantages of low cost and high response speed.

[0004] In a first aspect, the embodiment of the utility model provides a DC drive control system for a 285 ultra-heavy high-speed bar module rolling mill, characterized in that it includes:

[0005] DC motor, domestic high-power thyristor, drive controller, and first-level PLC device;

[0006] The DC motor is electrically connected to the domestic high-power thyristor, the domestic high-power thyristor is electrically connected to the drive controller, and the drive controller is communicatively connected to the primary PLC device.

[0007] Preferably, it further comprises: a detection device, wherein the detection device is electrically connected to the DC motor and the drive controller respectively.

[0008] Preferably, the drive controller is connected to the primary PLC device through a Profibus-DP communication protocol. The utility model has the following beneficial effects:

[0009] The DC drive control system provided by the utility model can provide a high response speed, and compared with the AC variable frequency drive system, the DC drive control system is relatively low in cost and more economical in terms of initial investment and maintenance costs, and can provide a very attractive option for the market.

[0010] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.

[0011] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A schematic diagram of a DC drive control system for a 285 ultra-heavy high-speed bar module rolling mill provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] To facilitate understanding of this embodiment, Figure 1 The DC drive control system for a 285 ultra-heavy high-speed bar module rolling mill disclosed in the utility model is introduced in detail.

[0016] Embodiment 1:

[0017] The DC drive control system for a 285 ultra-heavy high-speed bar module rolling mill disclosed in the embodiment of the utility model includes:

[0018] DC motor 1, domestic high-power thyristor 2, drive controller 3, primary PLC device 4;

[0019] The DC motor 1 is electrically connected to the domestic high-power thyristor 2 , the domestic high-power thyristor 2 is electrically connected to the drive controller 3 , and the drive controller 3 is communicatively connected to the primary PLC device 4 .

[0020] Wherein, the DC motor 1 is the main transmission device of the control system, which is used to provide efficient and fast dynamic response for the DC transmission control system;

[0021] The domestic high-power thyristor 2 is the KP2800A / 2600V thyristor produced by Zhuzhou CSR, which is used to control the on and off of high-power current and is highly efficient and reliable.

[0022] Drive controller 3 is Siemens 6RA80 series DC speed regulator, which is used to achieve precise control of DC motor;

[0023] The primary PLC device 4 is the main controller of the DC drive control system, and is used to process data and instructions based on an optimized control method to ensure that the DC drive control system can operate stably.

[0024] Preferably, it further comprises: a detection device 5, which is electrically connected to the DC motor 1 and the drive controller 3 respectively.

[0025] The detection device 5 is a motor encoder, which is used to monitor the actual operating state of the motor in real time to obtain operating information including rotation speed and position, and accurately feed back the operating information to the drive controller.

[0026] Preferably, the drive controller 3 is communicatively connected with the primary PLC device 4 based on the Profibus-DP communication protocol.

[0027] Embodiment 2:

[0028] The working principle of the DC drive control system for the 285 ultra-heavy high-speed bar module rolling mill disclosed in Example 1 is as follows:

[0029] When the primary PLC device 4 receives the speed adjustment instruction, it sends the corresponding data to the drive controller 3 via the Profibus-DP communication protocol;

[0030] The drive controller 3 receives the data and calculates the data using an optimized control method, thereby adjusting the working state of the domestic high-power thyristor 2, thereby controlling the speed of the DC motor 1;

[0031] At the same time, the drive controller 3 will also feed back the real-time speed of the DC motor 1 to the primary PLC device through the Profibus-DP communication protocol to ensure that the DC drive control system can achieve precise control.

[0032] Among them, the optimized control methods include PID (proportional-integral-differential) control algorithm and speed-current dual closed-loop control method.

[0033] The utility model can bring the following advantages:

[0034] 1. Performance improvement: Compared with the existing technology, the utility model adopts a drive controller and domestic high-power thyristors to make the DC drive control system have a faster response time and higher control accuracy. When the DC drive control system is applied to a high-speed bar production line, it can significantly improve the quality and consistency of the product.

[0035] 2. Cost-effectiveness: The use of domestic high-power thyristors helps to reduce the cost of the overall system. At the same time, due to the high efficiency of the DC drive control system, the maintenance cost and energy consumption cost under long-term operation are also relatively low.

[0036] 3. Improved efficiency: The DC drive control system improves production efficiency by optimizing the motor start, run and stop process. Especially in the acceleration and deceleration stages, it can reach the required speed more quickly and reduce time delays.

[0037] 4. Extended service life: Optimized control methods and stable DC power supply can reduce the impact on mechanical parts, thereby extending the service life of the rolling mill.

[0038] 5. Reduce material consumption and energy consumption: Efficient DC motor control reduces energy waste and material consumption in the production process, meeting the requirements of energy conservation and emission reduction.

[0039] 6. Safe and convenient operation: Profibus-DP communication protocol provides a user-friendly interface, making operation easier and safer; at the same time, the detection device capable of real-time feedback and monitoring can enhance the control of the entire production process.

[0040] 7. Reduce environmental pollution: High-efficiency DC motor control reduces energy consumption and indirectly reduces environmental pollution related to energy production.

[0041] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above-mentioned embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. The DC drive control system for 285 ultra-heavy high-speed bar module rolling mill is characterized in that: include: DC motor, domestic high-power thyristor, drive controller, and first-level PLC device; The DC motor is electrically connected to the domestic high-power thyristor, the domestic high-power thyristor is electrically connected to the drive controller, and the drive controller is communicatively connected to the primary PLC device.

2. The DC drive control system for a 285 ultra-heavy high-speed bar module rolling mill according to claim 1 is characterized in that: Also includes: A detection device is electrically connected to the DC motor and the drive controller respectively.

3. The DC drive control system for a 285 ultra-heavy high-speed bar module rolling mill according to claim 1 is characterized in that: The drive controller is communicatively connected with the primary PLC device based on the Profibus-DP communication protocol.

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