Strip steel induction heating speed and power self-adaptive matching method

Abstract

The invention relates to a speed and power self-adaptive matching method for induction heating of strip steel. According to the method, the difference value between the actual temperature of a strip steel outlet and the target temperature is monitored in real time, and when the difference value exceeds a set threshold value and induction heating voltage and current meet preset requirements, the running speed of the strip steel is automatically reduced; by adjusting the speed, it is ensured that the strip steel reaches the target temperature in the induction heating process, and the product quality and production stability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic induction heating, and particularly to a method for adaptively matching the speed and power of strip induction heating. Background Art

[0002] High-grade non-oriented silicon steel with a high silicon content, silicon steel for new energy vehicles, etc. need to be heated to 80 - 140 °C by electromagnetic induction heating before rolling to reduce the risk of strip breakage. In order to increase the output of the unit, the strip speed of the unit often reaches or even exceeds the maximum designed speed. However, the output power of induction heating is restricted by factors such as the power regulation method of the power supply, changes in strip specifications, and changes in process temperature. Under the current strip speed, the induction heating power is limited and cannot meet the target set plate temperature, and on-site operators are likely to not discover this problem in a timely manner, thereby affecting the product performance of the strip during subsequent rolling and the risk of strip breakage. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for adaptively matching the speed and power of strip induction heating to avoid the influence of limited output power of induction heating on the product performance of the strip.

[0004] To solve the above technical problems, the present invention provides a method for adaptively matching the speed and power of strip induction heating, including: When the difference between the detected actual outlet plate temperature and the target outlet plate temperature is greater than the temperature threshold, and the induction heating voltage and induction heating current meet the preset requirements, the running speed of the strip is reduced.

[0005] According to the above solution, the temperature threshold is 5 °C.

[0006] According to the above solution, when the ratio of the induction heating voltage to the maximum designed voltage of the power supply is within the preset voltage ratio range, the induction heating voltage meets the preset requirements.

[0007] According to the above solution, when the ratio of the induction heating current to the maximum designed current of the power supply is within the preset current ratio range, the induction heating current meets the preset requirements.

[0008] According to the above solution, the preset voltage ratio range is [0.95, 1.05].

[0009] According to the above solution, the preset current ratio range is [0.95, 1.05].

[0010] According to the above solution, the reduced running speed of the strip is determined according to the actual outlet plate temperature, the current running speed of the strip, and the target outlet plate temperature.

[0011] According to the above solution, the reduced running speed of the strip is the product of the ratio of the actual outlet plate temperature to the target outlet plate temperature and the current running speed of the strip.

[0012] The present invention also provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps of the method for adaptively matching the speed and power of strip induction heating described above are implemented.

[0013] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for adaptively matching the speed and power of strip induction heating described above are implemented.

[0014] Beneficial effects By automatically adjusting the strip speed, the present invention ensures that the strip can reach the target temperature during induction heating, avoids the decline of product performance caused by insufficient temperature, and thus improves the stability of product quality.

[0015] Furthermore, by setting a preset ratio range of voltage and current, the present invention ensures that the power supply output is within a reasonable range, avoids the problem of unstable heating caused by power supply fluctuations; and reasonable voltage and current control can prevent equipment overload or damage, and improve the service life and safety of the equipment.

[0016] Furthermore, based on the actual outlet plate temperature and the target outlet plate temperature, the running speed of the strip is adjusted. When the deviation between the actual outlet plate temperature and the target outlet plate temperature is larger, the running speed of the strip decreases more, so that the final running speed of the strip matches the power of strip induction heating. Description of the drawings

[0017] Figure 1 is the method for adaptively matching the speed and power of strip induction heating in Embodiment 1 of the present invention. Detailed implementation manners

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, rather than all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0019] Embodiment 1: See Figure 1 , this embodiment discloses a method for adaptively matching the speed and power of strip induction heating, including: When the difference between the detected actual outlet strip temperature Ta and the target outlet strip temperature Ts is greater than the temperature threshold, and the induction heating voltage U and the induction heating current I meet the preset requirements, the strip running speed V0 is reduced; in other cases, it is considered that the strip running speed matches the induction heating power and can meet the current process temperature production.

[0020] Further, the temperature threshold is 5°C.

[0021] Further, when the ratio of the induction heating voltage to the maximum designed voltage of the power supply is within the preset voltage ratio range, the induction heating voltage meets the preset requirements; the setting of this preset voltage ratio range can effectively avoid the heating instability problem caused by too high or too low voltage, ensure that the power supply output voltage is within a reasonable range, and thus ensure the stability of the heating effect; Further, when the ratio of the induction heating current to the maximum designed current of the power supply is within the preset current ratio range, the induction heating current meets the preset requirements; the setting of this preset current ratio range can effectively prevent the equipment from being damaged due to overload caused by too large current, and at the same time can also avoid insufficient heating caused by too small current, ensuring the safety and reliability of the induction heating process.

[0022] In this embodiment, the preset voltage ratio range is [0.95, 1.05], and the preset current ratio range is [0.95, 1.05]; the specific numerical settings of these two ranges are based on common power supply design parameters and strip heating process requirements, and can maximize the heating capacity of the power supply while ensuring the safe operation of the equipment to meet the production requirements. However, those skilled in the art should know that these values are not fixed and can be optimized and adjusted according to different equipment and processes.

[0023] Further, the reduced strip running speed V1 is determined according to the actual outlet strip temperature Ta, the current strip running speed V0, and the target outlet strip temperature Ts; specifically, the reduced strip running speed V1 is the product of the ratio of the actual outlet strip temperature Ta to the target outlet strip temperature Ts and the current strip running speed V0, that is, V1 = Ta * V0 / Ts; this calculation method can dynamically adjust the strip running speed according to the actual temperature deviation, making the running speed of the strip match the heating power during the induction heating process, so as to ensure that the strip can be fully heated to the target temperature, improve the product quality, and at the same time improve the energy utilization efficiency. However, those skilled in the art should understand that this is only one implementation manner of the present invention, and other reasonable calculation methods can also be used to determine the reduced strip running speed to achieve the adaptive matching of speed and power.

[0024] The beneficial effects of implementing the above technical solutions at least include: 1. Improve product quality: By precisely controlling the temperature and dynamically adjusting the strip speed, ensure that the strip can reach the target temperature during the induction heating process, improving the stability and reliability of product quality.

[0025] 2. Improve production stability: Automatically adjust the strip speed and precisely control the power output to avoid production interruptions or quality problems caused by temperature deviations or power fluctuations, improving the continuity and stability of production.

[0026] 3. Improve energy utilization efficiency: By reasonably matching the power and speed, avoid energy waste caused by excessive speed or unreasonable power output, improve energy utilization efficiency, and reduce production costs.

[0027] 4. Reduce manual intervention: By setting clear temperature thresholds and power control ranges, the system can automatically judge and adjust, reducing the need for manual monitoring and adjustment, and reducing the risk of human operation errors.

[0028] Example 2: The embodiment of the present invention provides a computer device, such as a smart phone, a tablet computer, a notebook computer, a desktop computer, a rack server, a blade server, a tower server or a cabinet server (including an independent server or a server cluster composed of multiple servers) that can execute programs. The computer device of this embodiment at least includes, but is not limited to, a memory and a processor that can communicate with each other through a system bus.

[0029] In this embodiment, the memory (i.e., the readable storage medium) includes flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM). The memory can also be an external storage device of the computer device, such as a plug-in hard disk equipped on the computer device, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Of course, the memory can also include both the internal storage unit of the computer device and its external storage device. In this embodiment, the memory is usually used to store the operating system installed on the computer device and various application software, such as the program code of the method for adaptive matching of strip induction heating speed and power in Example 1. In addition, the memory can also be used to temporarily store various data that have been output or will be output.

[0030] The processor may be a Central Processing Unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chips in some embodiments. The processor is generally used to control the overall operation of the computer device. In this embodiment, the processor is used to run the program code stored in the memory or process data to implement the method for adaptive matching of the speed and power of strip induction heating in Embodiment 1.

[0031] Embodiment 3: The present application also provides a computer-readable storage medium, such as a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an App application store, etc., on which a computer program is stored. When the program is executed by a processor, corresponding functions are implemented. The computer-readable storage medium of this embodiment is used to store the program code of the method for adaptive matching of the speed and power of strip induction heating, and when executed by the processor, it implements the method for adaptive matching of the speed and power of strip induction heating in Embodiment 1.

[0032] It should be noted that according to the needs of implementation, the various steps / components described in the present application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0033] Those skilled in the art can easily understand that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for adaptively matching speed and power of induction heating of steel strip, characterized in that: include: When the difference between the detected actual outlet plate temperature and the outlet target plate temperature is greater than the temperature threshold, and the induction heating voltage and induction heating current meet the preset requirements, the strip running speed is reduced.

2. The method for adaptively matching speed and power of induction heating of steel strip according to claim 1, characterized in that: The temperature threshold is 5°C.

3. The method for adaptively matching speed and power of induction heating of steel strip according to claim 1, characterized in that: When the ratio of the induction heating voltage to the maximum design voltage of the power supply is within a preset voltage ratio range, the induction heating voltage meets the preset requirements.

4. The method for adaptively matching speed and power of induction heating of steel strip according to claim 1, characterized in that: When the ratio of the induction heating current to the maximum design current of the power supply is within a preset current ratio range, the induction heating current meets the preset requirements.

5. The method for adaptively matching speed and power of induction heating of steel strip according to claim 3, characterized in that: The preset voltage ratio range is [0.95,1.05].

6. The method for adaptively matching speed and power of induction heating of steel strip according to claim 4, characterized in that: The preset current ratio range is [0.95,1.05].

7. The method for adaptively matching speed and power of induction heating of steel strip according to claim 1, characterized in that: The reduced strip running speed is determined based on the actual export plate temperature, the current strip running speed, and the export target plate temperature.

8. The method for adaptively matching speed and power of induction heating of steel strip according to claim 7, characterized in that: The reduced strip running speed is the ratio of the actual outlet plate temperature to the outlet target plate temperature, multiplied by the current strip running speed.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for adaptively matching speed and power of induction heating of a steel strip according to any one of claims 1 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for adaptively matching speed and power of induction heating of a steel strip according to any one of claims 1 to 8 are implemented.

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