CN117572911A - Intelligent steelmaking temperature control system of electric arc furnace - Google Patents
Intelligent steelmaking temperature control system of electric arc furnace Download PDFInfo
- Publication number
- CN117572911A CN117572911A CN202410038896.6A CN202410038896A CN117572911A CN 117572911 A CN117572911 A CN 117572911A CN 202410038896 A CN202410038896 A CN 202410038896A CN 117572911 A CN117572911 A CN 117572911A
- Authority
- CN
- China
- Prior art keywords
- module
- electric arc
- arc furnace
- sample
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010891 electric arc Methods 0.000 title claims abstract description 79
- 238000009628 steelmaking Methods 0.000 title claims abstract description 22
- 238000009423 ventilation Methods 0.000 claims abstract description 73
- 238000001514 detection method Methods 0.000 claims abstract description 69
- 238000005070 sampling Methods 0.000 claims abstract description 43
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000007493 shaping process Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000005284 excitation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 2
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses an intelligent steelmaking temperature control system of an electric arc furnace, which relates to the technical field of ventilation control and comprises a rotor detection module, a rotor control module and a control module, wherein the rotor detection module is used for detecting the position of a rotor of a ventilation device of the electric arc furnace; the sampling selection module is used for detecting exciting voltage and controlling the signal sampling state of the rotor detection module when the signal amplitude is maximum; the intelligent control module is used for receiving signals and adjusting the ventilation rate of the ventilation temperature control module of the electric arc furnace; and the restarting control module is used for controlling the signal holding module to perform signal holding work after the power failure is restarted and performing ventilation rate difference calculation by matching with the difference detection module and the rotor detection module. According to the intelligent steelmaking temperature control system of the electric arc furnace, the rotor detection module detects the rotor position of the ventilation device of the electric arc furnace, the intelligent control module adjusts the ventilation rate of the ventilation device of the electric arc furnace, and after the electric arc furnace is restarted after power failure, the difference value of the ventilation rates before and after the power failure is calculated by the difference detection module, so that the intelligent control module controls the ventilation rate to quickly reach the ventilation rate before the power failure.
Description
Technical Field
The invention relates to the technical field of ventilation control, in particular to an intelligent steelmaking temperature control system of an electric arc furnace.
Background
The electric arc furnace (electric arc furnace) is an electric furnace for smelting ores and metals at high temperature by utilizing electrode electric arcs, energy is concentrated when gas discharge forms an electric arc, the temperature of an arc area is more than 3000 ℃, in the steelmaking process of the electric arc furnace, local overheating phenomenon is easy to occur due to uneven material distribution, so that the temperature in the furnace is uneven, uniform smelting reaction cannot be realized, the conventional electric arc furnace adopts a mode of controlling a fan by a microcontroller to realize a temperature control effect, the condition that the heat of the electric arc furnace is uneven is avoided, but after the microcontroller is restarted due to outage, the system control is restarted, so that the ventilation rate of the fan is required to be regulated again according to the temperature condition, the required regulation time is longer, and unnecessary energy consumption is increased, so that improvement is needed.
Disclosure of Invention
The embodiment of the invention provides an intelligent steelmaking temperature control system of an electric arc furnace, which aims to solve the problems in the background technology.
According to an embodiment of the present invention, there is provided an intelligent steelmaking temperature control system for an electric arc furnace, the intelligent steelmaking temperature control system including: the device comprises a power supply module, a sampling selection module, a rotor detection module, an intelligent control module, an electric arc furnace ventilation temperature control module, a restarting control module, a signal holding module and a difference detection module;
the power supply module is used for providing power supply electric energy and standby electric energy;
the sampling selection module is connected with the electric arc furnace ventilation temperature control module and is used for detecting exciting voltage of an electric arc furnace ventilation device in the electric arc furnace ventilation temperature control module, performing partial pressure, amplitude comparison, two-division and pulse shaping on the detected exciting voltage, and outputting a first control signal when the detected exciting voltage amplitude is smaller than a set voltage threshold value and outputting a second control signal when the detected exciting voltage amplitude is larger than the set voltage threshold value;
the rotor detection module is connected with the electric arc furnace ventilation temperature control module and the sampling selection module, and is used for detecting the rotor position of the electric arc furnace ventilation device through the rotor detection circuit and generating sine and cosine alternating voltage, carrying out partial pressure isolation transmission on the sine and cosine alternating voltage and carrying out sampling and holding processing on signals which are subjected to partial pressure isolation transmission according to the first control signal and the second control signal;
the intelligent control module is connected with the rotor detection module, the difference detection module and the restarting control module, and is used for receiving signals output by the rotor detection module in a sampling and holding way and judging the rotor position of the electric arc furnace ventilation device, adjusting and outputting a first pulse signal according to the detected rotor position information, receiving the signals output by the restarting control module and performing system restarting work, and receiving the signals output by the difference detection module and adjusting the pulse width of the first pulse signal according to the difference degree;
the electric arc furnace ventilation temperature control module is connected with the intelligent control module and the power supply module and is used for receiving the first pulse signal and adjusting the ventilation rate of the electric arc furnace ventilation device;
the restarting control module is connected with the power supply module and is used for carrying out isolation outage detection on the electric energy output by the power supply module and outputting a third control signal in a self-locking mode after outage;
the signal holding module is connected with the sampling selection module, the restarting control module and the rotor detection module, and is used for carrying out reverse phase processing on the first control signal and the second control signal and respectively outputting a fourth control signal and a fifth control signal, and is used for holding and sampling the signals output by the rotor detection module through a fourth control signal and a fifth control signal holding circuit;
the difference detection module is connected with the signal holding module and is used for subtracting the signals which are held and sampled by the signal holding module and output by the rotor detection module and the signals which are sampled and held by the rotor detection module and output difference signals.
Compared with the prior art, the invention has the beneficial effects that: the intelligent steelmaking temperature control system of the electric arc furnace detects rotor position information of the electric arc furnace ventilation device through the rotor detection module, then judges the ventilation rate of the electric arc furnace ventilation device through the intelligent control module, and adjusts the ventilation rate, meanwhile, the sampling selection module can detect the rotor when the detection amplitude is maximum, so that the detection precision is improved, the restarting control module judges the power failure, and meanwhile, the self-locking control signal holding module holds the signal with the maximum amplitude detected before the power failure, so that after the intelligent control module is powered on and restarted, the difference value between the signal detected by the restarting rotor detection module and the signal detected before the power failure is calculated through the difference value detection module, so that the intelligent control module can quickly adjust the ventilation rate of the electric arc furnace ventilation device, and the ventilation rate can quickly reach the ventilation rate before the power failure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of an intelligent steelmaking temperature control system for an electric arc furnace according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of an intelligent steelmaking temperature control system for an electric arc furnace, which is provided by the embodiment of the invention.
Fig. 3 is a circuit diagram of connection of the signal holding module, the rotor detecting module and the sampling selecting module provided in the embodiment of the present invention.
Fig. 4 is a connection circuit diagram of a restart control module provided by an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In one embodiment, referring to FIG. 1, an intelligent steelmaking temperature control system for an electric arc furnace includes: the device comprises a power supply module 1, a sampling selection module 2, a rotor detection module 3, an intelligent control module 4, an electric arc furnace ventilation temperature control module 5, a restarting control module 6, a signal holding module 7 and a difference detection module 8;
specifically, the power module 1 is configured to provide power supply and standby power;
the sampling selection module 2 is connected with the electric arc furnace ventilation temperature control module 5 and is used for detecting exciting voltage of an electric arc furnace ventilation device in the electric arc furnace ventilation temperature control module 5, performing partial pressure, amplitude comparison, two frequency division and pulse shaping on the detected exciting voltage, and outputting a first control signal when the detected exciting voltage amplitude is smaller than a set voltage threshold value and outputting a second control signal when the detected exciting voltage amplitude is larger than the set voltage threshold value;
the rotor detection module 3 is connected with the electric arc furnace ventilation temperature control module 5 and the sampling selection module 2, and is used for detecting the rotor position of the electric arc furnace ventilation device through a rotor detection circuit and generating sine and cosine alternating voltages, carrying out partial pressure isolation transmission on the sine and cosine alternating voltages and carrying out sampling and holding processing on signals which are subjected to partial pressure isolation transmission according to the first control signal and the second control signal;
the intelligent control module 4 is connected with the rotor detection module 3, the difference detection module 8 and the restarting control module 6, and is used for receiving signals output by the rotor detection module 3 in a sampling and holding way and judging the rotor position of the electric arc furnace ventilation device, adjusting and outputting a first pulse signal according to the detected rotor position information, receiving the signals output by the restarting control module 6, receiving the signals output by the difference detection module 8 and adjusting the pulse width of the first pulse signal according to the difference degree;
the electric arc furnace ventilation temperature control module 5 is connected with the intelligent control module 4 and the power supply module 1 and is used for receiving the first pulse signal and adjusting the ventilation rate of the electric arc furnace ventilation device;
the restarting control module 6 is connected with the power module 1 and is used for carrying out isolation outage detection on the electric energy output by the power module 1 and outputting a third control signal in a self-locking way after outage;
the signal holding module 7 is connected with the sampling selection module 2, the restarting control module 6 and the rotor detection module 3, and is used for carrying out reverse phase processing on the first control signal and the second control signal and respectively outputting a fourth control signal and a fifth control signal, and is used for carrying out holding and sampling processing on the signal output by the rotor detection module 3 through a fourth control signal and a fifth control signal holding circuit;
the difference detection module 8 is connected with the signal holding module 7, and is used for respectively subtracting the signals which are output after the signal holding module 7 holds and samples and processes with the signals which are output after the rotor detection module 3 samples and holds and processes and outputting a difference signal.
In a specific embodiment, the power module 1 may supply power by using a power supply and a standby power supply, and the standby power supply performs power supply operation after the power supply is powered off; the sampling selection module 2 can adopt an excitation voltage detection circuit and a signal processing circuit, the excitation voltage detection circuit detects the excitation voltage of the electric arc furnace ventilation device during working and judges whether the detected signal is larger than a set voltage threshold value, and the signal processing module carries out frequency division by two and pulse shaping processing on the signal output after the judgment; the rotor detection module 3 can adopt a rotor detection circuit consisting of a rotary transformer circuit and a sine and cosine signal processing circuit, wherein the rotary transformer circuit detects the rotor position of the electric arc furnace ventilation device and generates sine and cosine alternating voltage, and the sine and cosine alternating voltage is subjected to partial pressure transmission, signal sampling and holding treatment through the sine and cosine signal processing circuit; the intelligent control module 4 can adopt a micro control circuit to receive signals and control the module; the electric arc furnace ventilation temperature control module 5 can adopt an electric arc furnace ventilation temperature control circuit, and the temperature of the electric arc furnace is controlled by the intelligent control module 4 and regulated by an electric arc furnace ventilation device; the restart control module 6 can adopt a power-off detection circuit and a restart control circuit, wherein the power-off detection circuit is used for power-off detection, and the restart control circuit is used for logic self-locking after power-off, so as to control the restart of the intelligent control module 4; the signal holding module 7 may use a signal holding circuit composed of a sample-and-hold device to hold the signal with the maximum amplitude detected by the rotor detecting module 3; the difference detection module 8 may employ a subtracting circuit, and may determine the difference between the two sets of signals by subtracting the two sets of signals.
In another embodiment, referring to fig. 1, 2, 3 and 4, the power module 1 further includes a power supply and a standby power supply; the electric arc furnace ventilation temperature control module 5 comprises a first frequency converter U2 and an electric arc furnace ventilation device; the intelligent control module 4 comprises a first controller U1;
specifically, the power supply is connected with the standby power supply and the input end of the first frequency converter U2, the control end of the first frequency converter U2 is connected with the third IO end of the first controller U1, and the output end of the first frequency converter U2 is connected with the electric arc furnace ventilation device.
In a specific embodiment, the power supply and the standby power supply both provide the required working electric energy, and the standby power supply will be automatically switched in after the power supply is powered off, which is not described herein; the first frequency converter U2 can be a frequency converter consisting of IGBT; the first controller U1 may be, but is not limited to, TMS320F2812.
Further, the rotor detection module 3 includes a first sensor B1, a first resistor R1, a second resistor R2, a first operational amplifier OP1, a first sample-and-hold device J1, and a first capacitor C1;
specifically, a first end of the first sensor B1 is connected to one end of the second resistor R2 and the in-phase end of the first operational amplifier OP1 through the first resistor R1, the other end of the second resistor R2 and the second end of the first sensor B1 are both grounded, an inverting end of the first operational amplifier OP1 is connected to an output end of the first operational amplifier OP1 and a third end of the first sample-and-hold device J1, a fourth end of the first sample-and-hold device J1 is connected to a seventh end and a ground end of the first sample-and-hold device J1 through the first capacitor C1, an eighth end of the first sample-and-hold device J1 is connected to the sample selection module 2, and a fifth end of the first sample-and-hold device J1 is connected to the first IO end of the first controller U1.
In a specific embodiment, the first sensor B1 may be a resolver, where the first end and the second end of the first sensor B1 are a first end and a second end of a sinusoidal output winding; the first resistor R1 and the second resistor R2 are used for voltage division; the first operational amplifier OP1 may be, but is not limited to, an OP07 operational amplifier, and forms a voltage follower; the first sample-hold device J1 can select an LF398 chip to realize the sample transmission and the hold transmission of signals.
Further, the rotor detection module 3 further includes a third resistor R3, a fourth resistor R4, a second operational amplifier OP2, a second sample-and-hold device J2, and a second capacitor C2;
specifically, one end of the third resistor R3 is connected to the third end of the first sensor B1, the other end of the third resistor R3 is connected to the in-phase end of the second operational amplifier OP2 and is connected to the fourth end and the ground end of the first sensor B1 through the fourth resistor R4, the inverting end of the second operational amplifier OP2 is connected to the output end of the second operational amplifier OP2 and the third end of the second sample-and-hold device J2, the fourth end of the second sample-and-hold device J2 is connected to the seventh end and the ground end of the second sample-and-hold device J2 through the second capacitor C2, and the eighth end and the fifth end of the second sample-and-hold device J2 are respectively connected to the sample selection module 2 and the second IO end of the first controller U1.
In a specific embodiment, the third end and the fourth end of the first sensor B1 are a first end and a second end of a cosine output winding; the third resistor R3 and the fourth resistor R4 are used for voltage division; the second operational amplifier OP2 may be, but is not limited to, an OP07 operational amplifier, and forms a voltage follower; the second sample-hold device J2 can be an LF398 chip, so as to realize the sample transmission and hold transmission of signals.
Further, the sampling selection module 2 includes a first winding B2, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first comparator A1, a first power source VCC1, an eighth resistor R8, a first diode D1, a second diode D2, a voltage threshold device, and a frequency division shaping device;
specifically, the first end of the first winding B2 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7 through the fifth resistor R5, the second end of the first winding B2 and the other end of the sixth resistor R6 are both grounded, the other end of the seventh resistor R7 is connected to the inverting end of the first comparator A1, the non-inverting end of the first comparator A1 is connected to the voltage threshold device, the power end of the first comparator A1 is connected to the first power VCC1 and to the output end of the first comparator A1 and to the anode of the first diode D1 through the eighth resistor R8, the cathode of the first diode D1 is connected to the cathode of the second diode D2 and to the input end of the frequency division shaping device, the anode of the second diode D2 is grounded, and the output end of the frequency division shaping device is connected to the eighth end of the first sample holding device J1 and the eighth end of the second sample holding device J2.
In a specific embodiment, the first winding B2 detects the exciting voltage of the electric arc furnace ventilation device during operation, and is not described herein; the first comparator A1 can be an LM393 comparator, and is matched with a voltage threshold device to detect exciting voltage larger than a set voltage threshold value, so as to obtain the exciting voltage with the maximum amplitude; the frequency division shaping device can be composed of 74LS74 and MCI4538, and is used for performing frequency division and shaping on the input signal so as to trigger the operation of the rotor detection module 3.
Further, the signal holding module 7 includes a third sample-and-hold device J3, a fourth sample-and-hold device J4, a first switching tube VT1, a third capacitor C3, a fourth capacitor C4, and a first inverter U5; the difference detection module 8 comprises first subtracting means and second subtracting means;
specifically, the third end of the third sample-and-hold device J3 is connected to the first input end of the first subtracting device and the fifth end of the first sample-and-hold device J1, the fourth end of the third sample-and-hold device J3 is connected to the seventh end of the third sample-and-hold device J3 and the ground end through a third capacitor C3, the fifth end of the third sample-and-hold device J3 is connected to the second input end of the first subtracting device, the eighth end of the third sample-and-hold device J3 is connected to the output end of the first inverter U5, the collector of the first switching tube VT1 and the eighth end of the fourth sample-and-hold device J4, the emitter of the first switching tube VT1 is grounded, the base of the first switching tube VT1 is connected to the restart control module 6, the input end of the first inverter U5 is connected to the output end of the divider shaping device, the third end of the fourth sample-and-hold device J4 is connected to the fifth end of the second subtracting device J2, the fourth end of the fourth sample-and-hold device J4 is connected to the fourth end of the fourth subtracting device J4 through a fourth capacitor C4, and the fourth end of the fourth sample-and the fourth output end of the fourth subtracting device J4 is connected to the fifth end of the fourth subtracting device.
In a specific embodiment, the third holding device and the fourth holding device may each be an LF398 chip; the first switch tube VT1 can be an NPN triode; the first subtracting device and the second subtracting device may be composed of subtracting circuits composed of operational amplifiers, and are not described herein.
Further, the restart control module 6 includes a third diode D3, a first optocoupler U3, a ninth resistor R9, a second power source VCC2, a fourth diode D4, a fifth diode D5, and a first logic chip U4;
specifically, the anode of the third diode D3 is connected to the power supply, the cathode of the third diode D3 is connected to the first end of the first optocoupler U3, the second end of the first optocoupler U3 is grounded, the third end of the first optocoupler U3 is connected to the anode of the fourth diode D4 and is connected to the second power VCC2 and the first input end of the first logic chip U4 through the ninth resistor R9, the cathode of the fourth diode D4 is connected to the second input end of the first logic chip U4 and the cathode of the fifth diode D5, and the anode of the fifth diode D5 is connected to the output end of the first logic chip U4, the fourth IO end of the first controller U1 and the base of the first switching tube VT 1.
In a specific embodiment, the first optical coupler U3 may be a PC817 optical coupler; the first logic chip U4 may be a logic chip, and cooperates with the second power VCC2, the ninth resistor R9, the fourth diode D4, and the fifth diode D5 to perform logic self-locking processing on the input signal.
In the intelligent steelmaking temperature control system of the electric arc furnace, a first sensor B1 acquires sine information and cosine information corresponding to the operation of an electric arc furnace ventilation device, the sine information and the cosine information are respectively processed by a first operational amplifier OP1, a first sampling and holding device J1, a second operational amplifier OP2 and a second sampling and holding device J2, the processed signals are transmitted to a first controller U1, the rotor position information of the electric arc furnace ventilation device is obtained after the decoding of the first controller U1, then ventilation rate information of the electric arc furnace ventilation device is obtained, in order to ensure the high precision of detection signals, the excitation voltage of the electric arc furnace ventilation device is detected by a first winding B2, the amplitude of the excitation voltage is judged by a first operational amplifier OP1, when the amplitude of the excitation voltage is maximum, the holding work of the first sampling and holding device J1 and the second sampling and holding device J2 is controlled by a frequency division device, and when the amplitude of the excitation voltage is maximum, the first inverter U5 controls the third sampling and holding device J3 and the fourth sampling and holding device J4 to perform sampling and transmission operation, so that the third capacitor C3 and the fourth capacitor C4 respectively hold signals with the largest amplitude, when the power supply is suddenly cut off, the standby power supply is connected, at the moment, the system is restarted due to the power failure, the ventilation rate of the electric arc furnace ventilation device is reduced, in order to ensure that the original ventilation rate is quickly restored, the first logic chip U4 continuously outputs high level, the first switching tube VT1 is controlled to be conducted, the third sampling and holding device J3 and the fourth sampling and holding device J4 perform signal holding processing, meanwhile, the first subtracting device performs subtracting processing on signals output by the third sampling and holding device J3 and the first sampling and holding device J1, the second subtracting device performs subtracting processing on signals output by the fourth sampling and holding device J4 and the second sampling and holding device J2, then, after power failure is known, the difference value between the obtained signal and the signal before power failure is detected, and at the moment, the first controller U1 quickly changes the pulse width of the first pulse signal until the difference value is smaller, so that the pulse width of the first pulse signal is stabilized, and the ventilation rate adjustment control of the electric arc furnace ventilation device is completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. An intelligent steelmaking temperature control system of an electric arc furnace is characterized in that,
the intelligent steelmaking temperature control system of the electric arc furnace comprises: the device comprises a power supply module, a sampling selection module, a rotor detection module, an intelligent control module, an electric arc furnace ventilation temperature control module, a restarting control module, a signal holding module and a difference detection module;
the power supply module is used for providing power supply electric energy and standby electric energy;
the sampling selection module is connected with the electric arc furnace ventilation temperature control module and is used for detecting exciting voltage of an electric arc furnace ventilation device in the electric arc furnace ventilation temperature control module, performing partial pressure, amplitude comparison, two-division and pulse shaping on the detected exciting voltage, and outputting a first control signal when the detected exciting voltage amplitude is smaller than a set voltage threshold value and outputting a second control signal when the detected exciting voltage amplitude is larger than the set voltage threshold value;
the rotor detection module is connected with the electric arc furnace ventilation temperature control module and the sampling selection module, and is used for detecting the rotor position of the electric arc furnace ventilation device through the rotor detection circuit and generating sine and cosine alternating voltage, carrying out partial pressure isolation transmission on the sine and cosine alternating voltage and carrying out sampling and holding processing on signals which are subjected to partial pressure isolation transmission according to the first control signal and the second control signal;
the intelligent control module is connected with the rotor detection module, the difference detection module and the restarting control module, and is used for receiving signals output by the rotor detection module in a sampling and holding way and judging the rotor position of the electric arc furnace ventilation device, adjusting and outputting a first pulse signal according to the detected rotor position information, receiving the signals output by the restarting control module and performing system restarting work, and receiving the signals output by the difference detection module and adjusting the pulse width of the first pulse signal according to the difference degree;
the electric arc furnace ventilation temperature control module is connected with the intelligent control module and the power supply module and is used for receiving the first pulse signal and adjusting the ventilation rate of the electric arc furnace ventilation device;
the restarting control module is connected with the power supply module and is used for carrying out isolation outage detection on the electric energy output by the power supply module and outputting a third control signal in a self-locking mode after outage;
the signal holding module is connected with the sampling selection module, the restarting control module and the rotor detection module, and is used for carrying out reverse phase processing on the first control signal and the second control signal and respectively outputting a fourth control signal and a fifth control signal, and is used for holding and sampling the signals output by the rotor detection module through a fourth control signal and a fifth control signal holding circuit;
the difference detection module is connected with the signal holding module and is used for subtracting the signals which are held and sampled by the signal holding module and output by the rotor detection module and the signals which are sampled and held by the rotor detection module and output difference signals.
2. The intelligent steelmaking temperature control system of an electric arc furnace as set forth in claim 1, wherein said power module further comprises a power supply and a backup power supply; the electric arc furnace ventilation temperature control module comprises a first frequency converter and an electric arc furnace ventilation device; the intelligent control module comprises a first controller;
the power supply is connected with the standby power supply and the input end of the first frequency converter, the control end of the first frequency converter is connected with the third IO end of the first controller, and the output end of the first frequency converter is connected with the electric arc furnace ventilation device.
3. The intelligent steelmaking temperature control system of an electric arc furnace according to claim 2, wherein the rotor detection module comprises a first sensor, a first resistor, a second resistor, a first operational amplifier, a first sample-and-hold device, and a first capacitor;
the first end of the first sensor is connected with one end of the second resistor and the same-phase end of the first operational amplifier through the first resistor, the other end of the second resistor and the second end of the first sensor are grounded, the opposite-phase end of the first operational amplifier is connected with the output end of the first operational amplifier and the third end of the first sample holding device, the fourth end of the first sample holding device is connected with the seventh end and the ground end of the first sample holding device through the first capacitor, the eighth end of the first sample holding device is connected with the sample selection module, and the fifth end of the first sample holding device is connected with the first IO end of the first controller.
4. The intelligent steelmaking temperature control system of an electric arc furnace according to claim 3, wherein said rotor detection module further comprises a third resistor, a fourth resistor, a second operational amplifier, a second sample-and-hold device, and a second capacitor;
one end of the third resistor is connected with the third end of the first sensor, the other end of the third resistor is connected with the in-phase end of the second operational amplifier and is connected with the fourth end and the ground end of the first sensor through the fourth resistor, the inverting end of the second operational amplifier is connected with the output end of the second operational amplifier and the third end of the second sample holding device, the fourth end of the second sample holding device is connected with the seventh end and the ground end of the second sample holding device through the second capacitor, and the eighth end and the fifth end of the second sample holding device are respectively connected with the sampling selection module and the second IO end of the first controller.
5. The intelligent steelmaking temperature control system according to claim 4, wherein said sampling selection module comprises a first winding, a fifth resistor, a sixth resistor, a seventh resistor, a first comparator, a first power supply, an eighth resistor, a first diode, a second diode, a voltage threshold device, and a divider-shaper;
the first end of the first winding is connected with one end of a sixth resistor and one end of a seventh resistor through a fifth resistor, the second end of the first winding and the other end of the sixth resistor are grounded, the other end of the seventh resistor is connected with the opposite phase end of the first comparator, the in-phase end of the first comparator is connected with a voltage threshold device, the power end of the first comparator is connected with a first power supply and is connected with the output end of the first comparator and the anode of a first diode through an eighth resistor, the cathode of the first diode is connected with the cathode of a second diode and the input end of a frequency division shaping device, the anode of the second diode is grounded, and the output end of the frequency division shaping device is connected with the eighth end of the first sample holding device and the eighth end of the second sample holding device.
6. The intelligent steelmaking temperature control system of an electric arc furnace according to claim 5, wherein the signal holding module comprises a third sample-and-hold device, a fourth sample-and-hold device, a first switching tube, a third capacitor, a fourth capacitor and a first inverter; the difference detection module comprises a first subtracting device and a second subtracting device;
the third end of the third sample-hold device is connected with the first input end of the first subtracting device and the fifth end of the first sample-hold device, the fourth end of the third sample-hold device is connected with the seventh end of the third sample-hold device and the ground end through a third capacitor, the fifth end of the third sample-hold device is connected with the second input end of the first subtracting device, the eighth end of the third sample-hold device is connected with the output end of the first inverter, the collector of the first switching tube and the eighth end of the fourth sample-hold device, the emitter of the first switching tube is grounded, the base of the first switching tube is connected with the restarting control module, the input end of the first inverter is connected with the output end of the frequency division shaping device, the third end of the fourth sample-hold device is connected with the first input end of the second subtracting device and the fifth end of the second sample-hold device, the fourth end of the fourth sample-hold device is connected with the seventh end of the fourth sample-hold device through a fourth capacitor, the fifth end of the fourth sample-hold device is connected with the second input end of the second subtracting device, the base of the first switching tube is connected with the output end of the fourth subtracting device and the output end of the fourth subtracting device is connected with the output end of the IO of the fourth subtracting device.
7. The intelligent steelmaking temperature control system of an electric arc furnace according to claim 6, wherein the restarting control module comprises a third diode, a first optocoupler, a ninth resistor, a second power supply, a fourth diode, a fifth diode and a first logic chip;
the anode of the third diode is connected with the power supply, the cathode of the third diode is connected with the first end of the first optical coupler, the second end of the first optical coupler is grounded, the third end of the first optical coupler is connected with the anode of the fourth diode and is connected with the second power supply and the first input end of the first logic chip through the ninth resistor, the cathode of the fourth diode is connected with the second input end of the first logic chip and the cathode of the fifth diode, and the anode of the fifth diode is connected with the output end of the first logic chip, the fourth IO end of the first controller and the base of the first switching tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410038896.6A CN117572911B (en) | 2024-01-11 | 2024-01-11 | Intelligent steelmaking temperature control system of electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410038896.6A CN117572911B (en) | 2024-01-11 | 2024-01-11 | Intelligent steelmaking temperature control system of electric arc furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117572911A true CN117572911A (en) | 2024-02-20 |
| CN117572911B CN117572911B (en) | 2024-03-12 |
Family
ID=89886514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410038896.6A Active CN117572911B (en) | 2024-01-11 | 2024-01-11 | Intelligent steelmaking temperature control system of electric arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117572911B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4716274A (en) * | 1985-10-25 | 1987-12-29 | Gilliland Malcolm T | Distributed station welding system |
| US5073695A (en) * | 1985-10-25 | 1991-12-17 | Gilliland Malcolm T | Welding power supply with short circuit protection |
| WO2023071495A1 (en) * | 2021-10-28 | 2023-05-04 | 北京卫星制造厂有限公司 | Power-on/off enabling and undervoltage locking circuit for satellite-borne power supply |
| WO2023098529A1 (en) * | 2021-11-30 | 2023-06-08 | 长春捷翼汽车科技股份有限公司 | New energy electronic lock and feedback control circuit thereof, and control method and new energy automobile |
| CN117147950A (en) * | 2023-11-01 | 2023-12-01 | 广东科信电子有限公司 | Automatic detection circuit for chip power supply voltage |
| CN220291875U (en) * | 2023-07-20 | 2024-01-02 | 上海泽兆电子科技有限公司 | Intelligent voltage conversion power supply |
-
2024
- 2024-01-11 CN CN202410038896.6A patent/CN117572911B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4716274A (en) * | 1985-10-25 | 1987-12-29 | Gilliland Malcolm T | Distributed station welding system |
| US5073695A (en) * | 1985-10-25 | 1991-12-17 | Gilliland Malcolm T | Welding power supply with short circuit protection |
| WO2023071495A1 (en) * | 2021-10-28 | 2023-05-04 | 北京卫星制造厂有限公司 | Power-on/off enabling and undervoltage locking circuit for satellite-borne power supply |
| WO2023098529A1 (en) * | 2021-11-30 | 2023-06-08 | 长春捷翼汽车科技股份有限公司 | New energy electronic lock and feedback control circuit thereof, and control method and new energy automobile |
| CN220291875U (en) * | 2023-07-20 | 2024-01-02 | 上海泽兆电子科技有限公司 | Intelligent voltage conversion power supply |
| CN117147950A (en) * | 2023-11-01 | 2023-12-01 | 广东科信电子有限公司 | Automatic detection circuit for chip power supply voltage |
Non-Patent Citations (3)
| Title |
|---|
| 何文杰;徐丽萍;朱强化;: "电弧炉控制系统设计", 信息通信, no. 04, 15 April 2015 (2015-04-15) * |
| 左涛;唐巍;: "基于DSP和CPLD实现的电能质量监测系统", 继电器, no. 08, 16 April 2008 (2008-04-16) * |
| 欧剑波;罗安;唐杰;荣飞;: "基于DSP的静止同步补偿器软硬件设计", 电力电子技术, no. 02, 20 February 2008 (2008-02-20) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117572911B (en) | 2024-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW201534039A (en) | Inverter apparatus and control method thereof | |
| CN117572911B (en) | Intelligent steelmaking temperature control system of electric arc furnace | |
| RU2013119629A (en) | ELECTRONIC CONTROL DEVICE AND METHOD FOR REDUCING ENERGY CONSUMPTION BY ELECTRIC HOUSEHOLD APPLIANCES IN STANDBY MODE | |
| CN103889114B (en) | A kind of LED dimming driving circuit | |
| RU2013119627A (en) | ELECTRONIC CONTROL DEVICE AND METHOD FOR REDUCING ENERGY CONSUMPTION BY ELECTRIC HOUSEHOLD APPLIANCES IN STANDBY MODE | |
| CN201527444U (en) | High-speed current detection circuit | |
| CN108418432B (en) | Control circuit and control method for improving load dynamic response and switching power supply | |
| CN103857084A (en) | Induction cooker control circuit and control method | |
| JP3553574B2 (en) | Control method of power converter for photovoltaic power generation | |
| CN102892247B (en) | The Method and circuits of crest factor is improved in gaseous discharge lamp | |
| JP4754902B2 (en) | Inverter power supply | |
| CN210605503U (en) | Voltage reduction circuit for ultra-high pressure mercury lamp | |
| JP5009689B2 (en) | Inverter power supply | |
| CN210380270U (en) | Energy storage power supply protection and operation control system | |
| CN108006991B (en) | Constant air quantity control system of gas rapid water heater | |
| CN207993772U (en) | D.C. contactor energy saving driving circuit plate | |
| CN219875462U (en) | Shut-off voltage adjusting circuit | |
| CN100377488C (en) | Semi-bridge conrol signal generating circuit and method thereof | |
| CN111404383B (en) | Power supply control device, air conditioner and power supply control method of air conditioner | |
| CN220382769U (en) | Low-voltage passive filtering compensation device | |
| CN219264530U (en) | Standby control circuit of air conditioner and air conditioner | |
| CN210524096U (en) | Arc stabilizer of alternating current argon arc welding machine | |
| JP2001060119A (en) | Maximum power control method for solar battery | |
| CN219960534U (en) | Power amplifier switch control device and power amplifier system | |
| CN219535908U (en) | Switching tube rectifying circuit, driving chip and controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |