Chip control board for suspension furnace

Abstract

The invention relates to the technical field of suspension furnaces, in particular to a chip control panel for a suspension furnace, which comprises a chip unit, a PLC (programmable logic controller) unit, a power supply unit, a start delay unit, a power regulation unit, a rectification trigger unit, an inversion pulse output unit and a line protection unit, the chip unit, the PLC unit, the line protection unit, the start delay unit, the power regulation unit, the rectification trigger unit and the inversion pulse output unit are integrated together through a circuit board. Through cooperation of the chip unit, the PLC unit, the power supply unit, the start delay unit, the power regulation unit, the rectification trigger unit, the inversion pulse output unit and the line protection unit, logic lines suitable for integration are processed through chip internal logic array assembly, and a plurality of electronic elements are integrated into the same chip. Therefore, the system has the functions of high integration level, miniaturization, low power and low cost, and meets the requirements of current informatization, digitization and intelligent management control.

Description

Technical Field

[0001] The invention belongs to the technical field of suspension furnaces, and in particular relates to a chip control board for a suspension furnace. Background Art

[0002] As a key technology for the preparation of advanced materials, suspension melting equipment is currently widely used in the preparation of high-temperature, refractory, active and other advanced materials in the aerospace field. At present, the control panels for suspension furnaces are mostly composed of analog components. The metal in the molten pool is suspended in the air by centrifugation through the magnetic field generated by the electromagnet. The principle of electromagnetic induction is used to rapidly heat the metal in the molten pool under the action of the high-frequency electromagnetic field and reach the melting temperature.

[0003] However, since the structure of the suspension smelting furnace includes multiple parts such as the electrical system, smelting system and vacuum system, each part requires precise control and coordination. This complex structure leads to an increase in the overall complexity of the control circuit. In the face of the rapid development of intelligent equipment, it cannot meet the current needs of information, digitization and intelligent management and control. Therefore, we need to propose a chip control board for a suspension furnace to solve the above-mentioned problems, so that it has the functions of high integration, miniaturization, low power and low cost, and meets the current needs of information, digitization and intelligent management and control. Summary of the invention

[0004] In view of the above problems, the present invention provides a chip control board for a suspension furnace, comprising: a chip unit, which receives feedback information from each unit in real time through an internal program of a programmable logic chip, controls the entire system to operate stably after logical operations, and outputs a protection action signal if an abnormality occurs in the system based on a line feedback signal;

[0005] A PLC unit, the PLC unit is used to connect to the peripheral control signal transmission and receive the input of the self-set protection value;

[0006] A power supply unit, which stabilizes the external 220V power supply signal to positive and negative 15V and positive 5V signals to ensure stable operation of the control board;

[0007] A start delay unit, which is used to automatically control the running action sequence after receiving a start command;

[0008] A power regulating unit, after receiving the power regulating signal, transmits it to the control board after anti-interference processing, and then outputs the power regulating instruction after signal processing by the chip unit;

[0009] A rectifier trigger unit, after receiving the start action, the chip unit will issue an instruction to output a rectifier pulse to control the main circuit thyristor element to remain in a fully open state;

[0010] An inverter pulse output unit, which, after the rectification trigger unit works, performs enhanced amplification processing on the pulse signal output by the chip unit, outputs it to the main circuit, and controls the operation of the inverter element;

[0011] A line protection unit, which collects current and voltage signals in the main circuit and performs protection actions after being processed by a chip unit;

[0012] The chip unit, PLC unit, line protection unit, start-up delay unit, power regulation unit, rectification trigger unit and inverter pulse output unit are all integrated together through a circuit board, and the power supply unit is unidirectionally connected to the chip unit.

[0013] Further, the chip unit includes a single-chip computer U3, a resistor R41 and a crystal oscillator Y1 are connected in parallel between pins 2 and 3 of the single-chip computer U3, capacitors C31 and C32 are connected at both ends of the crystal oscillator Y1, one end of the capacitor C31 and one end of the capacitor C32 are grounded, capacitor C4 is connected to pin 5 of the single-chip computer U3, one end of the capacitor C4 is connected to capacitor C5, one end of the capacitor C5 is connected to pin 4 of the single-chip computer U3, resistor R11 and diode D4 are connected in parallel at the connection end between the capacitor C5 and pin 4 of the single-chip computer U3, capacitor C3 is connected between pins 31 and 32 of the single-chip computer U3, resistor R9 is connected to the connection end between the capacitor C3 and pin 31 of the single-chip computer U3, and capacitor C22 is connected to the ground at pin 17 of the single-chip computer U3.

[0014] Furthermore, the PLC unit includes a PLC controller U12, a plurality of control switches SB are connected in parallel to the PLC controller U12, a relay KM2 is connected to the Y0 pin of the PLC controller U12, one end of the relay KM2 is connected to the L pin of the PLC controller U12, and the N pin of the PLC controller U12 is connected to the COM1 pin.

[0015] Further, the start delay unit includes a comparator U18A, a comparator U18, a relay JDQ and a connection terminal J9 connected to the relay JDQ, a diode D40 is connected to pin 1 and pin 16 of the relay JDQ, a diode D27 and a diode D28 are connected in parallel to the connection end between pin 1 of the relay JDQ and the diode D40, a resistor R56 is connected in parallel to the diode D27, a resistor R52 is connected in parallel to the diode D28, a resistor R53 is connected to the negative terminal of the comparator U18A, one end of the resistor R53 is connected to the connection end of the diode D28 and the resistor R52, and a capacitor C27 is connected to the connection end of the resistor R53 and the diode D28, and a capacitor C27 is connected to the negative terminal of the comparator U18B. A resistor R55 is provided, one end of the resistor R55 is connected to the connection end of the diode D27 and the resistor R56, a resistor R29 and a diode D26 are connected in series to the output end of the comparator U18B, a resistor R54 and a diode D25 are connected in series to the output end of the comparator U18A, a diode D61 is connected between the diode D26 and the diode D25, a diode D1 and a resistor R36 are connected in parallel to the connection end of the diode D61 and the diode D25, an inverter U13 is connected to the connection end of the diode D1 and the resistor R36, the positive terminal of the comparator U18A is connected to the positive terminal of the comparator U18B, and the connection end of the positive terminal of the comparator U18A and the positive terminal of the comparator U18B are connected to resistors R66 and R67.

[0016] Further, the power supply unit includes a power chip U1, a coupling chip U2, a rectifier BD and a transformer T1, the inductive end of the coupling chip U2 is connected to the power chip U1, the inductive end of the coupling chip U2 is connected in parallel with a resistor R14, a resistor R11, and a capacitor C8 and a resistor R16 arranged in series, one end of the resistor R16 is connected to the 2nd foot of the coupling chip U2 through a voltage stabilizing diode U4, the transformer T1 is connected to the control end of the power chip U1, one side of the transformer T1 is connected in parallel with a capacitor C50, a capacitor C45, and a resistor R30 and a resistor R4 arranged in series, the connection end of the resistor R4 and the capacitor C50 is connected to the control end of the power chip U1 through a diode D67, and the capacitor C45 is connected to the 3rd and 4th feet of the rectifier BD. The other end of the rectifier BD is connected to a common-mode inductor LF1, one end of the common-mode inductor LF1 is connected in parallel with a capacitor CX1, a varistor MOV, and resistors R1 and R2 arranged in series, one end of the varistor MOV1 is connected to a fuse FUSE, the other end of the transformer T1 is connected to a diode D8 and a diode D7, the diode D8 is connected in parallel with a capacitor C7 and a resistor R13 arranged in series, the diode D7 is connected in parallel with a capacitor C6 and a resistor R12 arranged in series, the connecting end of the diode D7 and the resistor R12 is connected to a ground capacitor C10, the connecting end of the diode D8 and the resistor R13 is connected to an inductor L1-1, and the two ends of the inductor L1-1 are respectively connected to ground C9 and ground C11.

[0017] Further, the power regulating unit includes a regulating chip U21, wherein the 4th pin of the regulating chip U21 is connected to a resistor R204, one end of the resistor R204 is connected to a bipolar diode VT1, one end of the bipolar diode VT1 is connected to a resistor RL, one end of the resistor RL is connected to the 5th pin of the regulating chip U21 through a resistor R205, the other end of the bipolar diode VT1 is connected to a resistor R203, one end of the resistor R203 is connected in parallel to a light-emitting diode VL1, a light-emitting diode VL2 and a light-emitting diode VL3, and the light-emitting diode VL1, the light-emitting diode VL2 and the light-emitting diode VL3 are connected in parallel. L2 and the light-emitting diode VL3 are respectively connected to the 6th, 8th and 1st pins of the regulating chip U21; a capacitor C203 and a switch S2 are connected in parallel between the 7th and 3rd pins of the regulating chip U21; a resistor R201, a capacitor C201, a diode VS1 and a diode VD1 are connected in parallel between the 2nd pin of the regulating chip U21 and the connecting end of the switch S2; one end of the diode VD1 is connected to the capacitor C202; one end of the capacitor C202 is connected to the resistor R202; one end of the resistor R202 is connected to the diode VD2; and one end of the diode VD2 is connected to one end of the diode VS1.

[0018] Furthermore, the rectification trigger unit includes a rectifier BG2 and a thyristor U10, a capacitor CD8 is connected between pins 3 and 2 of the thyristor U10, a capacitor CD9 is connected between pins 1 and 2 of the thyristor U10, and the capacitor CD9 is connected between pins 1 and 4 of the rectifier BG2, and pins 2 and 3 of the rectifier BG2 are connected to a receiving terminal J5.

[0019] Further, the inverter pulse output unit includes a transistor Q101 and a transistor Q102 connected to the transistor Q101, a capacitor C101 and a diode D101 are connected between the drain and source of the transistor Q101, an inductor L102 is connected to the connecting end of the diode D101 and the capacitor C101, one end of the inductor L102 is connected to a resistor R102, one end of the resistor R102 is connected to the other end of the diode D101, a resistor R106 is connected to the connecting end of the capacitor C101 and the inductor L102, one end of the resistor R106 is connected to an operator U7, and the output end of the operator U7 is connected in series with resistors R109 and R110 A resistor R108, a resistor R107 and a capacitor C104 are connected in parallel to the connection end between the positive terminal of the operator U7 and the resistor R106. An inductor L101 is also connected to the drain of the transistor Q101. One end of the inductor L101 is connected to the resistor R101. One end of the resistor R101 is connected to the resistor R104. One end of the resistor R104 is connected to the drain of the transistor Q102. A capacitor C102, a resistor R105 and an inductor L103 are connected between the drain and source of the transistor Q102. A resistor R103 is connected to the connection end between the capacitor C102 and the resistor R105. One end of the resistor R103 is connected to the other end of the capacitor C102.

[0020] Further, the line protection unit includes a transistor Q22, a transistor Q21 and a connection terminal J3, the transistor Q21 is connected to pin 1 of the connection terminal J3, the transistor Q22 is connected to the gate of the transistor Q21, the gate of the transistor Q22 is connected to a resistor RS1, a diode VZ1 is connected between the drain and source of the transistor Q22, one end of the diode VZ1 is connected to a resistor RS2, one end of the resistor RS2 is connected to a diode DS2, one end of the diode DS2 is connected to the drain of the transistor Q21, the drain of the transistor Q21 and the connection terminal J3 are connected in parallel with a resistor RS3 and a capacitor C2, a diode DS1 is connected to the connection end of the capacitor C2 and the resistor RS3, and one end of the diode DS1 is connected to the source of the transistor Q21.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention, through the cooperation of chip unit, PLC unit, power supply unit, start delay unit, power regulation unit, rectifier trigger unit, inverter pulse output unit and line protection unit, processes the logic circuit suitable for integration in the whole set of electrical circuits through the internal logic array assembly of the chip, and integrates multiple electronic components into the same chip, so that it has the functions of high integration, miniaturization, low power and low cost, realizes the circuit design with complex functions, and meets the needs of current information, digitalization and intelligent management and control.

[0023] 2. The present invention realizes the digital management and intelligent control functions of the main control board chip by adding a PLC automatic control system, introducing Internet of Things online technology, expanding chip functions and compatibility.

[0024] 3. In terms of product cost, the chip integrated control circuit of the present invention can reduce the number of components in the main control board, simplify the system design, and thus reduce the manufacturing cost. After the chip integration is realized, the control circuit board has a more beautiful and delicate appearance and a sense of technology.

[0025] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A system block diagram according to an embodiment of the present invention is shown;

[0028] Figure 2 A circuit diagram of a start-up delay unit according to an embodiment of the present invention is shown;

[0029] Figure 3 shows a circuit diagram of a chip unit according to an embodiment of the present invention;

[0030] Figure 4 shows a circuit diagram of a PLC unit according to an embodiment of the present invention;

[0031] Figure 5 shows a circuit diagram of a power supply unit according to an embodiment of the present invention;

[0032] Figure 6A circuit diagram of a power regulating unit according to an embodiment of the present invention is shown;

[0033] Figure 7 shows a circuit diagram of a rectification trigger unit according to an embodiment of the present invention;

[0034] Figure 8 A circuit diagram of an inverter pulse output unit according to an embodiment of the present invention is shown;

[0035] Fig. 9 A circuit diagram of a line protection unit according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The embodiment of the present invention provides a chip control board for a suspension furnace, such as Figure 1-9 As shown, it includes a chip unit, a PLC unit, a power supply unit, a start delay unit, a power regulating unit, a rectifier trigger unit, an inverter pulse output unit and a line protection unit. The chip unit, the PLC unit, the line protection unit, the start delay unit, the power regulating unit, the rectifier trigger unit and the inverter pulse output unit are all integrated together through a circuit board, and the power supply unit is unidirectionally connected to the chip unit.

[0038] The chip unit receives feedback information from each unit in real time through the internal program of the programmable logic chip, and controls the stable operation of the entire system after logical operation. If the system is abnormal, it judges and processes according to the line feedback signal and outputs a protection action signal;

[0039] The chip unit includes a single-chip microcomputer U3, a resistor R41 and a crystal oscillator Y1 are connected in parallel between pins 2 and 3 of the single-chip microcomputer U3, capacitors C31 and C32 are connected at both ends of the crystal oscillator Y1, one end of the capacitor C31 and one end of the capacitor C32 are both grounded, a capacitor C4 is connected to pin 5 of the single-chip microcomputer U3, one end of the capacitor C4 is connected to capacitor C5, one end of the capacitor C5 is connected to pin 4 of the single-chip microcomputer U3, a resistor R11 and a diode D4 are connected in parallel to the connection end between the capacitor C5 and pin 4 of the single-chip microcomputer U3, A capacitor C3 is connected between pins 31 and 32 of the single-chip microcomputer U3, a resistor R9 is connected to the ground at the connection end between the capacitor C3 and pin 31 of the single-chip microcomputer U3, and a capacitor C22 is connected to the ground at pin 17 of the single-chip microcomputer U3; the single-chip microcomputer U3 receives feedback information from each unit, and performs logical operations and processing on the received information according to its own logical algorithm, and generates corresponding control signals based on the logical operation results. The capacitor C22, the capacitor C3 and the resistor R9 are used to ensure the stability and filtering of the single-chip microcomputer U3, thereby improving the working stability of the single-chip microcomputer U3.

[0040] The PLC unit is used to connect to the peripheral control signal transmission and receive the input of the self-set protection value;

[0041] The PLC unit includes a PLC controller U12, and a plurality of control switches SB are connected in parallel to the PLC controller U12. A relay KM2 is connected to the Y0 pin of the PLC controller U12, and one end of the relay KM2 is connected to the L pin of the PLC controller U12. The N pin of the PLC controller U12 is connected to the COM1 pin. By reasonably programming the PLC controller U12, the connection of peripheral control signal transmission and the reception of input of self-set protection values ​​can be realized. The functional parameters that the designer wants to input temporarily can also be input through the touch screen, and transmitted to the chip by the PLC controller U12 for calculation and processing, and the corresponding action instructions are output.

[0042] The power supply unit stabilizes the external 220V power supply signal to positive and negative 15V and positive 5V signals to ensure stable operation of the control board;

[0043] The power supply unit includes a power chip U1, a coupling chip U2, a rectifier BD and a transformer T1. The inductive end of the coupling chip U2 is connected to the power chip U1. The inductive end of the coupling chip U2 is connected in parallel with a resistor R14, a resistor R11, and a capacitor C8 and a resistor R16 arranged in series. One end of the resistor R16 is connected to the 2nd pin of the coupling chip U2 through a voltage stabilizing diode U4. The transformer T1 is connected to the control end of the power chip U1. One side of the transformer T1 is connected in parallel with a capacitor C50, a capacitor C45 and a resistor C8 and a resistor C16 arranged in series. R30 and resistor R4, the connection end of the resistor R4 and capacitor C50 is connected to the control end of the power chip U1 through a diode D67, the capacitor C45 is connected between pins 3 and 4 of the rectifier BD, the other end of the rectifier BD is connected to a common-mode inductor LF1, one end of the common-mode inductor LF1 is connected in parallel with a capacitor CX1, a varistor MOV and a resistor R1 and a resistor R2 arranged in series, one end of the varistor MOV1 is connected to a fuse FUSE, the other end of the transformer T1 is connected to diodes D8 and D7, The diode D8 is connected in parallel with a capacitor C7 and a resistor R13 which are arranged in series, the diode D7 is connected in parallel with a capacitor C6 and a resistor R12 which are arranged in series, the connecting end of the diode D7 and the resistor R12 is connected with a capacitor C10 to ground, the connecting end of the diode D8 and the resistor R13 is connected with an inductor L1-1, and the two ends of the inductor L1-1 are respectively connected with C9 to ground and C11 to ground. The alternating current enters the circuit through the rectifier BD, and the function of the rectifier is to convert the alternating current into direct current. The coupling chip U2 is connected to the power chip U1, and the coupling chip U2 is connected to the power chip U1. It is used to realize signal coupling and transmission. At the same time, the voltage stabilizing diode U4 is connected in parallel with the resistor R16 and connected to the 2nd pin of the coupling chip U2 to stabilize the voltage. When the system is abnormal, the voltage stabilizing diode can protect the circuit from overvoltage damage. The transformer T1 is responsible for converting the input AC voltage into a voltage suitable for the equipment and transmitting the input voltage to the output end through the principle of magnetic coupling. Through a series of steps such as rectification, filtering, coupling, voltage stabilization, power conversion and feedback control, the input AC power is converted into a stable and reliable DC output.

[0044] The start delay unit is used to automatically control the operation sequence after receiving the start command;

[0045] The start delay unit includes a comparator U18A, a comparator U18, a relay JDQ, and a connection terminal J9 connected to the relay JDQ. The 1st and 16th pins of the relay JDQ are connected to a diode D40. The connection end between the 1st pin of the relay JDQ and the diode D40 is connected in parallel with a diode D27 and a diode D28. The diode D27 is connected in parallel with a resistor R56. The diode D28 is connected in parallel with a resistor R52. The negative terminal of the comparator U18A is connected to a resistor R53. One end of the resistor R53 is connected to the connection end between the diode D28 and the resistor R52. The connection end between the resistor R53 and the diode D28 is connected to a capacitor C27. The negative terminal of the comparator U18B is connected to a resistor R 55, one end of the resistor R55 is connected to the connection end of the diode D27 and the resistor R56, the output end of the comparator U18B is connected in series with the resistor R29 and the diode D26, the output end of the comparator U18A is connected in series with the resistor R54 and the diode D25, a diode D61 is connected between the diode D26 and the diode D25, a diode D1 and a resistor R36 are connected in parallel to the connection end of the diode D61 and the diode D25, an inverter U13 is connected to the connection end of the diode D1 and the resistor R36, the positive terminal of the comparator U18A is connected to the positive terminal of the comparator U18B, and the positive terminal of the comparator U18A is connected to the positive terminal of the comparator U18B. The connection end is connected to the positive terminal of the comparator U18B, and the resistor R66 and the resistor R67 are connected;

[0046] When the device is in the stopped state, the 4-pin OFF2 of the connection terminal J9 is in a low level state, the negative terminal of the comparator U18A and the negative terminal of the comparator U18B are both low levels, and the sampling voltage of the positive terminals of the two through the resistors R66 and R67 is higher than the level of the negative terminal. The output of the amplifier U18A and the output of the amplifier U18B are in a high level state, and the high level is output to the outside. The rectifier trigger unit stops working, and the inverter pulse output unit converts the high level into a low level signal through the inverter U13. The inverter pulse output unit is in a stopped state. Since the capacitance of capacitor C27 is twice that of capacitor C26, the charging time is longer than the charging time of capacitor C26, and the time for the action to occur is relatively delayed by about 2 seconds. In this way, when starting, the rectifier trigger unit is started first, and the inverter unit is started 2 seconds later, which has a delay effect on the startup sequence. There is a diode D61 in the middle to block, and the rectifier and inverter do not interfere with each other after starting.

[0047] After pressing the start button, the relay JDQ is energized, OFF2 becomes a high level, and the capacitor C26 is charged through the resistor R56. After the capacitor C26 is charged, a high level is given to the negative terminal of the comparator U18B through the resistor R55. After the high level is compared with the fixed sampling voltage composed of the resistor R66 and the resistor R67, the comparison voltage is high at the positive terminal. Then, the output terminal of U18B outputs a low level signal, which is transmitted to the upper rectifier trigger unit through the protection resistor R29 and the diode D26. After the trigger end of the rectifier trigger unit changes from a high level to a low level, the rectifier trigger unit starts to work. At the same time, the low level signal output by the diode D26 cannot turn on the diode D61, and does not affect the state of the lower inverter pulse output unit.

[0048] After the start button is pressed, the resistor R52 starts to charge through the capacitor C27. After charging is completed, the negative terminal of the comparator U18A changes from a low level to a high level. After exceeding the sampling voltage, the output terminal of the comparator U18A flips from a high level to a low level, and the cathode of the diode D25 changes from a high level to a low level. After passing through the resistor R36, the diode D1 discharges the high level to the ground through the resistor R37, giving the inverter U13 a low level signal, which is reversed to a high level through the inverter U13, thereby triggering the inverter pulse output unit to start working;

[0049] After the stop button of the device is pressed, the relay JDQ is disconnected, the original high level of OFF2 becomes a low level, the capacitor C26 finishes charging and discharging first, the high level is discharged through the diode D27, the negative terminal of U18B changes from a high level to a low level, the output becomes a high level signal, the diode D26 outputs a high level signal, and the rectifier unit stops.

[0050] The delayed charging and discharging time of capacitor C27 ends about 1 second later than that of capacitor C26. Diode D25 outputs a high-level signal, which passes through the charging and discharging circuit composed of resistor R36 and capacitor C30, so that the high-level signal output to pin 9 of inverter U13 has a delay of about 0.5 seconds to ensure that after the equipment stops, the rectifier trigger unit stops before the inverter pulse unit, allowing the electric energy of the main circuit of the equipment to be discharged through the inverter load, avoiding impact on the main circuit rectifier unit.

[0051] After receiving the power adjustment signal, the power adjustment unit transmits it to the control board after anti-interference processing, and then outputs the power adjustment instruction after signal processing by the chip unit;

[0052] The power regulating unit includes a regulating chip U21, wherein the 4th pin of the regulating chip U21 is connected to a resistor R204, one end of the resistor R204 is connected to a bipolar diode VT1, one end of the bipolar diode VT1 is connected to a resistor RL, one end of the resistor RL is connected to the 5th pin of the regulating chip U21 through a resistor R205, the other end of the bipolar diode VT1 is connected to a resistor R203, one end of the resistor R203 is connected in parallel to a light-emitting diode VL1, a light-emitting diode VL2 and a light-emitting diode VL3, and the light-emitting diodes VL1, VL2 and VL3 are connected to the 6th pin and the 6th pin of the regulating chip U21 respectively. Pin 8 is connected with pin 1, capacitor C203 and switch S2 are connected in parallel between pin 7 and pin 3 of the regulating chip U21, resistor R201, capacitor C201, diode VS1 and diode VD1 are connected in parallel between pin 2 of the regulating chip U21 and the connecting end of switch S2, one end of the diode VD1 is connected with capacitor C202, one end of the capacitor C202 is connected with resistor R202, one end of the resistor R202 is connected with diode VD2, and one end of the diode VD2 is connected with one end of the diode VS1. By regulating the chip U21 and the resistors, capacitors, diodes and other components around it, precise control and protection of the power in the circuit are achieved.

[0053] After the rectification trigger unit receives the start action, the chip unit will issue a command to output a rectification pulse to control the main circuit thyristor element to remain in a fully open state;

[0054] The rectification trigger unit includes a rectifier BG2 and a thyristor U10, a capacitor CD8 is connected between pins 3 and 2 of the thyristor U10, a capacitor CD9 is connected between pins 1 and 2 of the thyristor U10, and the capacitor CD9 is connected between pins 1 and 4 of the rectifier BG2, and pins 2 and 3 of the rectifier BG2 are connected to receiving terminals J5. When the rectification trigger unit receives a power adjustment signal, it will perform a logic operation through the chip unit, and then transmit the signal to the chip unit after signal processing. By controlling the conduction and shutdown of the thyristor, precise control of the power in the circuit is achieved.

[0055] After the rectification trigger unit works, the inverter pulse output unit enhances and amplifies the pulse signal output by the chip unit, outputs it to the main circuit, and controls the inverter element to work;

[0056] The inverter pulse output unit includes a transistor Q101 and a transistor Q102 connected to the transistor Q101, a capacitor C101 and a diode D101 are connected between the drain and source of the transistor Q101, an inductor L102 is connected to the connecting end of the diode D101 and the capacitor C101, one end of the inductor L102 is connected to a resistor R102, one end of the resistor R102 is connected to the other end of the diode D101, a resistor R106 is connected to the connecting end of the capacitor C101 and the inductor L102, one end of the resistor R106 is connected to an operator U7, an output end of the operator U7 is connected in series with resistors R109 and R110, a positive terminal of the operator U7 is connected to a connecting end with resistor R106 with resistors R108, R107 and capacitor C104 in parallel, and the transistor Q101 is connected to the output end of the transistor Q101. The drain of the tube Q101 is also connected to an inductor L101, one end of the inductor L101 is connected to a resistor R101, one end of the resistor R101 is connected to a resistor R104, one end of the resistor R104 is connected to the drain of the transistor Q102, a capacitor C102, a resistor R105 and an inductor L103 are connected between the drain and source of the transistor Q102, a resistor R103 is connected to the connecting end of the capacitor C102 and the resistor R105, one end of the resistor R103 is connected to the other end of the capacitor C102, the operator U7, the resistor R106, the resistor R108, the resistor R107 and the capacitor C104 form a feedback network for stabilizing the output of the operator and reducing noise interference, and the output voltage and frequency can be flexibly controlled by adjusting the on-off time interval of the transistors Q101 and Q102.

[0057] The line protection unit collects the current and voltage signals in the main circuit, and performs protection actions after being processed by the chip unit;

[0058] The line protection unit includes a transistor Q22, a transistor Q21 and a connection terminal J3, wherein the transistor Q21 is connected to pin 1 of the connection terminal J3, the transistor Q22 is connected to the gate of the transistor Q21, a resistor RS1 is connected to the gate of the transistor Q22, a diode VZ1 is connected between the drain and source of the transistor Q22, one end of the diode VZ1 is connected to a resistor RS2, one end of the resistor RS2 is connected to a diode DS2, one end of the diode DS2 is connected to the drain of the transistor Q21, a resistor RS3 and a capacitor C2 are connected in parallel to the connection end of the drain of the transistor Q21 and the connection terminal J3, and a diode D is connected to the connection end of the capacitor C2 and the resistor RS3. S1, one end of the diode DS1 is connected to the source of the transistor Q21, a diode VZ1 is connected between the drain and source of the transistor Q22 to stabilize or protect the voltage and prevent the transistor from being damaged by excessive voltage, a diode DS2 is connected to the drain of the transistor Q21 for rectification or protection to ensure that the current can only flow in one direction, the transistor Q21, the connecting terminal J3, the resistor RS3 and the capacitor C2 form a feedback network for stabilizing the working state of the circuit, and a diode DS1 is further connected to the connecting end of the capacitor C2 and the resistor RS3 for further rectification or protection to ensure that when a fault or abnormal situation occurs in the circuit, the power supply can be quickly cut off or other protective measures can be taken, thereby protecting the safety of the circuit and the equipment.

[0059] When working, a double-layer PCB board structure is adopted. The power supply unit, rectifier trigger unit, and inverter pulse output unit, three types of units that use more heating elements, are distributed at the edge of the circuit board to avoid heat radiation interference to the entire circuit. The signal of the power control unit needs to increase anti-interference processing to avoid the control board issuing erroneous operation instructions due to external interference signals. The line protection action is to output the protection instruction in the chip, first cut off the rectifier pulse signal, and then cut off the inverter pulse output, which can avoid the inverter part of the main circuit, and release the high voltage and large current directly to the external inductance, reducing the reverse impact on the upstream rectifier unit. By assembling the logic circuit suitable for integration in the whole set of electrical circuits through the chip internal logic array, multiple electronic components are integrated into the same chip to realize complex circuit design; add PLC automatic control system, introduce Internet of Things online technology, expand chip functions and compatibility, and realize the digital management and intelligent control function of the main control board chip; in terms of product cost, the chip integrated control circuit can reduce the number of components in the main control board, simplify the system design, and thus reduce the manufacturing cost. After the chip integration is realized, the control circuit board has a more beautiful and exquisite appearance and a sense of technology.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chip control board for a suspension furnace, characterized in that: include: The chip unit receives feedback information from each unit in real time through the internal program of the programmable logic chip, controls the stable operation of the entire system after logical operation, and outputs a protection action signal if the system is abnormal based on the line feedback signal; A PLC unit, the PLC unit is used to connect to the peripheral control signal transmission and receive the input of the self-set protection value; A power supply unit, which stabilizes the external 220V power supply signal to positive and negative 15V and positive 5V signals to ensure stable operation of the control board; A start delay unit, which is used to automatically control the running action sequence after receiving a start command; A power regulating unit, after receiving the power regulating signal, transmits it to the control board after anti-interference processing, and then outputs the power regulating instruction after signal processing by the chip unit; The rectifier trigger unit, after receiving the start action, the chip unit will issue an instruction to output a rectifier pulse to control the main circuit thyristor element to maintain a fully open state; An inverter pulse output unit, which, after the rectification trigger unit works, performs enhanced amplification processing on the pulse signal output by the chip unit, outputs it to the main circuit, and controls the operation of the inverter element; A line protection unit, which collects current and voltage signals in the main circuit, performs protection actions after being processed by a chip unit; The chip unit, PLC unit, line protection unit, start-up delay unit, power regulation unit, rectification trigger unit and inverter pulse output unit are all integrated together through a circuit board, and the power supply unit is unidirectionally connected to the chip unit.

2. The chip control board for suspension furnace according to claim 1, characterized in that: The chip unit includes a single-chip microcomputer U3, a resistor R41 and a crystal oscillator Y1 are connected in parallel between pins 2 and 3 of the single-chip microcomputer U3, capacitors C31 and C32 are connected at both ends of the crystal oscillator Y1, one end of the capacitor C31 and one end of the capacitor C32 are grounded, capacitor C4 is connected to pin 5 of the single-chip microcomputer U3, one end of the capacitor C4 is connected to capacitor C5, one end of the capacitor C5 is connected to pin 4 of the single-chip microcomputer U3, resistor R11 and diode D4 are connected in parallel at the connection end between the capacitor C5 and pin 4 of the single-chip microcomputer U3, capacitor C3 is connected between pins 31 and 32 of the single-chip microcomputer U3, resistor R9 is connected to the connection end between the capacitor C3 and pin 31 of the single-chip microcomputer U3, and capacitor C22 is connected to the ground at pin 17 of the single-chip microcomputer U3.

3. The chip control board for suspension furnace according to claim 2, characterized in that: The PLC unit includes a PLC controller U12, and a plurality of control switches SB are connected in parallel to the PLC controller U12. A relay KM2 is connected to the Y0 pin of the PLC controller U12, one end of the relay KM2 is connected to the L pin of the PLC controller U12, and the N pin of the PLC controller U12 is connected to the COM1 pin.

4. The chip control board for suspension furnace according to claim 3, characterized in that: The start delay unit includes a comparator U18A, a comparator U18, a relay JDQ, and a connection terminal J9 connected to the relay JDQ. The 1st and 16th pins of the relay JDQ are connected to a diode D40. The connection end between the 1st pin of the relay JDQ and the diode D40 is connected in parallel with a diode D27 and a diode D28. The diode D27 is connected in parallel with a resistor R56. The diode D28 is connected in parallel with a resistor R52. The negative terminal of the comparator U18A is connected to a resistor R53. One end of the resistor R53 is connected to the connection end between the diode D28 and the resistor R52. The connection end between the resistor R53 and the diode D28 is connected to a capacitor C27. The negative terminal of the comparator U18B is connected to a resistor R 55, one end of the resistor R55 is connected to the connection end of the diode D27 and the resistor R56, the output end of the comparator U18B is connected in series with the resistor R29 and the diode D26, the output end of the comparator U18A is connected in series with the resistor R54 and the diode D25, a diode D61 is connected between the diode D26 and the diode D25, a diode D1 and a resistor R36 are connected in parallel to the connection end of the diode D61 and the diode D25, an inverter U13 is connected to the connection end of the diode D1 and the resistor R36, the positive terminal of the comparator U18A is connected to the positive terminal of the comparator U18B, and the positive terminal of the comparator U18A and the positive terminal of the comparator U18B are connected to the resistor R66 and the resistor R67.

5. The chip control board for suspension furnace according to claim 4, characterized in that: The power supply unit includes a power chip U1, a coupling chip U2, a rectifier BD and a transformer T1. The inductive end of the coupling chip U2 is connected to the power chip U1. The inductive end of the coupling chip U2 is connected in parallel with a resistor R14, a resistor R11, and a capacitor C8 and a resistor R16 arranged in series. One end of the resistor R16 is connected to the 2nd foot of the coupling chip U2 through a voltage stabilizing diode U4. The transformer T1 is connected to the control end of the power chip U1. One side of the transformer T1 is connected in parallel with a capacitor C50, a capacitor C45, and a resistor R30 and a resistor R4 arranged in series. The connection end of the resistor R4 and the capacitor C50 is connected to the control end of the power chip U1 through a diode D67. The capacitor C45 is connected between the 3rd and 4th feet of the rectifier BD. The other end of the rectifier BD is connected to a common-mode inductor LF1, one end of the common-mode inductor LF1 is connected in parallel with a capacitor CX1, a varistor MOV, and resistors R1 and R2 arranged in series, one end of the varistor MOV1 is connected to a fuse FUSE, the other end of the transformer T1 is connected to a diode D8 and a diode D7, the diode D8 is connected in parallel with a capacitor C7 and a resistor R13 arranged in series, the diode D7 is connected in parallel with a capacitor C6 and a resistor R12 arranged in series, the connecting end of the diode D7 and the resistor R12 is connected to a ground capacitor C10, the connecting end of the diode D8 and the resistor R13 is connected to an inductor L1-1, and the two ends of the inductor L1-1 are respectively connected to ground C9 and ground C11.

6. The chip control board for suspension furnace according to claim 5, characterized in that: The power regulating unit includes a regulating chip U21, wherein the 4th pin of the regulating chip U21 is connected to a resistor R204, one end of the resistor R204 is connected to a bipolar diode VT1, one end of the bipolar diode VT1 is connected to a resistor RL, one end of the resistor RL is connected to the 5th pin of the regulating chip U21 through a resistor R205, the other end of the bipolar diode VT1 is connected to a resistor R203, one end of the resistor R203 is connected in parallel to a light emitting diode VL1, a light emitting diode VL2 and a light emitting diode VL3, and the light emitting diodes VL1, VL2 and The light emitting diode VL3 is respectively connected to the 6th, 8th and 1st pins of the regulating chip U21; a capacitor C203 and a switch S2 are connected in parallel between the 7th and 3rd pins of the regulating chip U21; a resistor R201, a capacitor C201, a diode VS1 and a diode VD1 are connected in parallel between the 2nd pin of the regulating chip U21 and the connecting end of the switch S2; one end of the diode VD1 is connected to the capacitor C202; one end of the capacitor C202 is connected to the resistor R202; one end of the resistor R202 is connected to the diode VD2; and one end of the diode VD2 is connected to one end of the diode VS1.

7. The chip control board for suspension furnace according to claim 6, characterized in that: The rectification trigger unit includes a rectifier BG2 and a thyristor U10, a capacitor CD8 is connected between pins 3 and 2 of the thyristor U10, a capacitor CD9 is connected between pins 1 and 2 of the thyristor U10, and the capacitor CD9 is connected between pins 1 and 4 of the rectifier BG2, and pins 2 and 3 of the rectifier BG2 are connected to a receiving terminal J5.

8. The chip control board for suspension furnace according to claim 7, characterized in that: The inverter pulse output unit includes a transistor Q101 and a transistor Q102 connected to the transistor Q101, a capacitor C101 and a diode D101 are connected between the drain and source of the transistor Q101, an inductor L102 is connected to the connecting end of the diode D101 and the capacitor C101, one end of the inductor L102 is connected to a resistor R102, one end of the resistor R102 is connected to the other end of the diode D101, a resistor R106 is connected to the connecting end of the capacitor C101 and the inductor L102, one end of the resistor R106 is connected to an operator U7, and the output end of the operator U7 is connected in series with resistors R109 and R110. Resistors R108, R107 and C104 are connected in parallel to the connection end between the positive terminal of the operator U7 and the resistor R106. An inductor L101 is also connected to the drain of the transistor Q101. One end of the inductor L101 is connected to the resistor R101. One end of the resistor R101 is connected to the resistor R104. One end of the resistor R104 is connected to the drain of the transistor Q102. Capacitor C102, resistor R105 and inductor L103 are connected between the drain and source of the transistor Q102. Resistor R103 is connected to the connection end between the capacitor C102 and the resistor R105. One end of the resistor R103 is connected to the other end of the capacitor C102.

9. The chip control board for suspension furnace according to claim 8, characterized in that: The line protection unit includes a transistor Q22, a transistor Q21 and a connection terminal J3, the transistor Q21 is connected to pin 1 of the connection terminal J3, the transistor Q22 is connected to the gate of the transistor Q21, the gate of the transistor Q22 is connected to a resistor RS1, a diode VZ1 is connected between the drain and source of the transistor Q22, one end of the diode VZ1 is connected to a resistor RS2, one end of the resistor RS2 is connected to a diode DS2, one end of the diode DS2 is connected to the drain of the transistor Q21, the drain of the transistor Q21 is connected to the connection terminal J3, and a resistor RS3 and a capacitor C2 are connected in parallel, the connection end of the capacitor C2 and the resistor RS3 is connected to a diode DS1, and one end of the diode DS1 is connected to the source of the transistor Q21.

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