A chip control board for a suspension furnace

Abstract

The present application relates to the technical field of suspension furnace, and particularly relates to a chip control panel for a suspension furnace, which comprises a chip unit, a PLC unit, a power supply unit, a start delay unit, a power adjustment unit, a rectification trigger unit, an inverter pulse output unit and a line protection unit, wherein the chip unit, the PLC unit, the line protection unit, the start delay unit, the power adjustment unit, the rectification trigger unit and the inverter pulse output unit are integrated together through a circuit board; the chip unit, the PLC unit, the power supply unit, the start delay unit, the power adjustment unit, the rectification trigger unit, the inverter pulse output unit and the line protection unit are matched, the logic circuit suitable for integration is processed through chip internal logic array assembly, a plurality of electronic components are integrated into the same chip, the chip has the functions of high integration, miniaturization, low power and low cost, and meets the needs of current informatization, digitization and intelligent management control.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of suspension furnaces, and particularly relates to a chip control panel for a suspension furnace. BACKGROUND

[0002] As a key technology for preparing advanced materials, the suspension smelting equipment is currently widely used in the preparation of high-temperature, refractory and active advanced materials in the field of aerospace; at present, the control panel for the suspension furnace is mainly composed of analog components, and the metal in the molten pool is suspended in the air by the magnetic field generated by the electromagnet, and the metal in the molten pool is rapidly heated and reaches the melting temperature under the action of the high-frequency electromagnetic field through the principle of electromagnetic induction;

[0003] However, since the structure of the suspension smelting furnace includes an electric system, a smelting system and a vacuum system and the like, each part needs to be accurately controlled and coordinated, and the overall complexity of the control circuit is increased due to the complex structure, and in the face of the rapid development of intelligent equipment, it cannot meet the needs of current informatization, digitization and intelligent management control, and therefore we need to propose a chip control panel for a suspension furnace to solve the above problems, so that it has the functions of high integration, miniaturization, low power and low cost, and meets the needs of current informatization, digitization and intelligent management control. SUMMARY

[0004] In view of the above problems, the application provides a chip control panel for a suspension furnace, which comprises: a chip unit, which receives feedback information of each unit in real time through an internal program of a programmable logic chip, controls stable operation of the whole system after logical operation, and outputs a protection action signal after judging and processing according to a line feedback signal if the system appears abnormal;

[0005] A PLC unit is used for connecting peripheral control signal transmission and receiving input of a self-set protection value.

[0006] A power supply unit is used for stabilizing an external 220V power signal to positive and negative 15V and positive 5V signals, so as to ensure stable operation of the control panel.

[0007] A start-up delay unit is used for automatically controlling a running action sequence after receiving a start-up command.

[0008] A power regulation unit is used for transmitting a power regulation signal to the control panel after anti-interference processing, and then outputting an instruction of regulating power after signal processing of the chip unit.

[0009] A rectification triggering unit is used for outputting a rectification pulse by the chip unit after receiving a start-up action, so as to control a main loop thyristor element to keep a full open state.

[0010] The inverter pulse output unit amplifies and enhances the pulse signal output by the chip unit after the rectifier trigger unit is working, and outputs it to the main circuit to control the inverter element to work.

[0011] The line protection unit collects the current and voltage signals in the main circuit, processes them through the chip unit, and then performs protection actions.

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

[0013] Furthermore, the chip unit includes a microcontroller U3. A resistor R41 and a crystal oscillator Y1 are connected in parallel between pins 2 and 3 of the microcontroller U3. Capacitors C31 and C32 are connected to the two ends of the crystal oscillator Y1, respectively. One end of capacitor C31 and one end of capacitor C32 are grounded. A capacitor C4 is connected to pin 5 of the microcontroller U3. One end of capacitor C4 is connected to capacitor C5. One end of capacitor C5 is connected to pin 4 of the microcontroller U3. A resistor R11 and a diode D4 are connected in parallel between the connection point of capacitor C5 and pin 4 of the microcontroller U3. A capacitor C3 is connected between pins 31 and 32 of the microcontroller U3. A resistor R9 is connected to ground between the connection point of capacitor C3 and pin 31 of the microcontroller U3. A capacitor C22 is connected to ground between pin 17 of the microcontroller U3.

[0014] Furthermore, the PLC unit includes a PLC controller U12, which has multiple control switches SB connected in parallel. A relay KM2 is connected to the Y0 pin of the PLC controller U12, one end of which 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 starting delay unit comprises a comparator U18A, a comparator U18, a relay JDQ, and a connection terminal J9 connected with the relay JDQ, diode D40 connected to the 1st pin and the 16th pin of the relay JDQ, diode D27 and diode D28 connected in parallel to the 1st pin of the relay JDQ and the connection terminal of the diode D40, diode D27 connected in parallel with resistor R56, diode D28 connected in parallel with resistor R52, resistor R53 connected to the negative terminal of the comparator U18A, one end of the resistor R53 connected to the connection terminal of the diode D28 and the resistor R52, capacitor C27 connected to the connection terminal of the resistor R53 and the diode D28, resistor R55 connected to the negative terminal of the comparator U18B, one end of the resistor R55 connected to the connection terminal of the diode D27 and the resistor R56, resistor R29 and diode D26 connected in series to the output terminal of the comparator U18B, resistor R54 and diode D25 connected in series to the output terminal of the comparator U18A, diode D61 connected between the diode D26 and the diode D25, diode D1 and resistor R36 connected in parallel to the connection terminal of the diode D61 and the diode D25, inverter U13 connected to the connection terminal of the diode D1 and the resistor R36, the positive terminal of the comparator U18A and the positive terminal of the comparator U18B connected, and resistor R66 and resistor R67 connected to the connection terminal of the positive terminal of the comparator U18A and the positive terminal of the comparator U18B.

[0016] Further, the power supply unit comprises a power supply chip U1, a coupling chip U2, a rectifier BD and a transformer T1, the inductive end of the coupling chip U2 is connected with the power supply 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 with the 2 pin of the coupling chip U2 through a voltage stabilizing diode U4, the transformer T1 is connected on the control end of the power supply 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 resistor R4 and the connection end of the capacitor C50 are connected with the control end of the power supply chip U1 through a diode D67, the capacitor C45 is connected between the 3 pin and the 4 pin of the rectifier BD, the other end of the rectifier BD is connected with a common mode inductor LF1, one end of the common mode inductor LF1 is connected in parallel with a capacitor CX1, a voltage-dependent resistor MOV and a resistor R1 and a resistor R2 arranged in series, one end of the voltage-dependent resistor MOV1 is connected with a fuse FUSE, the other end of the transformer T1 is connected with 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 connection end of the diode D7 and the resistor R12 is connected with a ground capacitor C10, the connection end of the diode D8 and the resistor R13 is connected with an inductor L1-1, the two ends of the inductor L1-1 are respectively connected with a ground C9 and a ground C11.

[0017] Further, the power supply unit comprises a power supply chip U1, a coupling chip U2, a rectifier BD and a transformer T1, the inductive end of the coupling chip U2 is connected with the power supply 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 with the 2 pin of the coupling chip U2 through a voltage stabilizing diode U4, the transformer T1 is connected on the control end of the power supply 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 resistor R4 and the connection end of the capacitor C50 are connected with the control end of the power supply chip U1 through a diode D67, the capacitor C45 is connected between the 3 pin and the 4 pin of the rectifier BD, the other end of the rectifier BD is connected with a common mode inductor LF1, one end of the common mode inductor LF1 is connected in parallel with a capacitor CX1, a voltage-dependent resistor MOV and a resistor R1 and a resistor R2 arranged in series, one end of the voltage-dependent resistor MOV1 is connected with a fuse FUSE, the other end of the transformer T1 is connected with 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 connection end of the diode D7 and the resistor R12 is connected with a ground capacitor C10, the connection end of the diode D8 and the resistor R13 is connected with an inductor L1-1, the two ends of the inductor L1-1 are respectively connected with a ground C9 and a ground C11.

[0018] Further, the rectifier trigger unit comprises a rectifier BG2 and a thyristor U10, a capacitor CD8 is connected between the 3-pin and the 2-pin of the thyristor U10, a capacitor CD9 is connected between the 1-pin and the 2-pin of the thyristor U10, the capacitor CD9 is connected between the 1-pin and the 4-pin of the rectifier BG2, and the 2-pin and the 3-pin of the rectifier BG2 are connected with a receiving terminal J5.

[0019] Further, the inverter pulse output unit comprises a transistor Q101 and a transistor Q102 connected with the transistor Q101, a capacitor C101 and a diode D101 are connected between the drain and the source of the transistor Q101, an inductor L102 is connected with the connection end of the diode D101 and the capacitor C101, one end of the inductor L102 is connected with a resistor R102, one end of the resistor R102 is connected with the other end of the diode D101, a resistor R106 is connected with the connection end of the capacitor C101 and the inductor L102, one end of the resistor R106 is connected with an operation device U7, the output end of the operation device U7 is connected in series with a resistor R109 and a resistor R110, the positive end of the operation device U7 is connected in parallel with a resistor R108, a resistor R107 and a capacitor C104 at the connection end of the resistor R106, the drain of the transistor Q101 is further connected with an inductor L101, one end of the inductor L101 is connected with a resistor R101, one end of the resistor R101 is connected with a resistor R104, one end of the resistor R104 is connected with the drain of the transistor Q102, the drain and the source of the transistor Q102 are connected with a capacitor C102, a resistor R105 and an inductor L103, the connection end of the capacitor C102 and the resistor R105 is connected with a resistor R103, one end of the resistor R103 is connected with the other end of the capacitor C102.

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

[0021] The present application has the following beneficial effects:

[0022] 1. The application is characterized in that the chip unit, PLC unit, power supply unit, start delay unit, power regulation unit, rectification trigger unit, inverter pulse output unit and line protection unit are matched to process the integrated logic circuit in the whole electrical circuit through the chip internal logic array assembly, multiple electronic components are integrated 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 informatization, digitization and intelligent management control.

[0023] 2. The application is characterized in that the PLC automatic control system is increased, the Internet of Things online technology is introduced, the chip function and compatibility are expanded, and the digital management and intelligent control function of the main control board chip are realized.

[0024] 3. 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 realization of chip integration, the control circuit board has a more beautiful and delicate appearance, and has a sense of technology.

[0025] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structure indicated in the specification, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0027] Figure 1 The system block diagram according to the embodiment of the present application is shown;

[0028] Figure 2 The circuit diagram of the start delay unit according to the embodiment of the present application is shown;

[0029] Figure 3 The circuit diagram of the chip unit according to the embodiment of the present application is shown;

[0030] Figure 4 The circuit diagram of the PLC unit according to the embodiment of the present application is shown;

[0031] Figure 5 The circuit diagram of the power supply unit according to the embodiment of the present application is shown;

[0032] Figure 6A circuit diagram of the power adjusting unit according to the embodiment of the present application is shown;

[0033] Figure 7 A circuit diagram of the rectification triggering unit according to the embodiment of the present application is shown;

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

[0035] Figure 9 A circuit diagram of the line protection unit according to the embodiment of the present application is shown. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] The embodiment of the present application provides a chip control board for a suspension furnace, as shown in the figure, comprising a chip unit, a PLC unit, a power supply unit, a start delay unit, a power adjusting unit, a rectification triggering 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 adjusting unit, the rectification triggering unit and the inverter pulse output unit are integrated together through a circuit board, and the power supply unit is unidirectionally connected with the chip unit. Figures 1-9

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

[0039] ​The chip unit includes a single-chip microcomputer U3, a resistance R41 and a crystal oscillator Y1 are connected in parallel between the 2th pin and the 3th pin of the single-chip microcomputer U3, the two ends of the crystal oscillator Y1 are connected with a capacitor C31 and a capacitor C32 respectively, one end of the capacitor C31 and one end of the capacitor C32 are grounded, a capacitor C4 is connected to the 5th pin of the single-chip microcomputer U3, one end of the capacitor C4 is connected with a capacitor C5, one end of the capacitor C5 is connected with the 4th pin of the single-chip microcomputer U3, the capacitor C5 is connected in parallel with a resistance R11 and a diode D4 at the connection end of the 4th pin of the single-chip microcomputer U3, a capacitor C3 is connected between the 31th pin and the 32th pin of the single-chip microcomputer U3, a resistance R9 is connected to the connection end of the 31th pin of the single-chip microcomputer U3, a capacitor C22 is connected to the 17th pin of the single-chip microcomputer U3; the single-chip microcomputer U3 receives feedback information of each unit, and performs logical operation and processing on the received information according to its own logical algorithm, generates corresponding control signals based on the logical operation result, and the capacitor C22, the capacitor C3 and the resistance R9 are used to ensure the stability and filtering of the single-chip microcomputer U3, and improve the stability of the single-chip microcomputer U3.

[0040] The PLC unit is used for connecting peripheral control signal transmission and receiving input of the set protection value.

[0041] The PLC unit includes a PLC controller U12, a plurality of control switches SB are connected in parallel on the PLC controller U12, a relay KM2 is connected to the Y0th pin of the PLC controller U12, one end of the relay KM2 is connected with the Lth pin of the PLC controller U12, the Nth pin of the PLC controller U12 is connected with the COM1th pin, by reasonably programming the PLC controller U12, the connection of the peripheral control signal transmission and the receiving input of the set protection value are realized, and the functional parameters temporarily wanted to be input by the designer can also be input through the touch screen, transmitted to the chip by the PLC controller U12 for operation processing, and the corresponding action instruction is output.

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

[0043] The power supply unit includes a power supply chip U1, a coupling chip U2, a rectifier BD and a transformer T1, the inductive end of the coupling chip U2 is connected with the power supply 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 with the 2 pin of the coupling chip U2 through a voltage stabilizing diode U4, the transformer T1 is connected on the control end of the power supply 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 with the control end of the power supply chip U1 through a diode D67, the capacitor C45 is connected between the 3 pin and the 4 pin of the rectifier BD, the other end of the rectifier BD is connected with a common mode inductor LF1, one end of the common mode inductor LF1 is connected in parallel with a capacitor CX1, a voltage-dependent resistor MOV and a resistor R1 and a resistor R2 arranged in series, one end of the voltage-dependent resistor MOV1 is connected with a fuse FUSE, the other end of the transformer T1 is connected with 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 connection end of the diode D7 and the resistor R12 is connected with a ground capacitor C10, the connection end of the diode D8 and the resistor R13 is connected with an inductor L1-1, the two ends of the inductor L1-1 are respectively connected with a ground C9 and a ground C11, alternating current enters the circuit through the rectifier BD, the function of the rectifier is to convert alternating current into direct current, the coupling chip U2 is connected with the power supply chip U1, for realizing coupling and transmission of signals, at the same time, the voltage stabilizing diode U4 is connected in parallel with the resistor R16, and is connected with the 2 pin of the coupling chip U2, for stabilizing 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 alternating voltage into a voltage suitable for the use of the device, and realizes the transmission of 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 transformation and feedback control, the input alternating current is converted into stable and reliable direct current output.

[0044] The starting delay unit is used for automatically controlling the running action sequence after receiving a starting command.

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

[0046] When the device is in the stop state, the 4th pin OFF2 of the connection terminal J9 is in the low level state, the negative terminals of the comparator U18A and the comparator U18B are both low level, and the sampling voltage of the positive terminals of the two through the resistor R66 and the resistor R67 is higher than the level of the negative terminals. The output terminals of the amplifier U18A and the amplifier U18B are in the high level state, and output high level to the outside. The rectification trigger unit stops working, the inverter pulse output unit changes the high level into the low level signal through the inverter U13, and the inverter pulse output unit is in the stop state. Since the capacitor C27 has a capacitance value twice as large as that of the capacitor C26, the charging time is longer than that of the capacitor C26, and the action time is relatively delayed by about 2 seconds. In this way, when starting, the rectification trigger unit is started first, and the inverter unit is started after 2 seconds, which plays a starting sequence delay effect. The diode D61 blocks in between, and the rectification and inversion do not interfere with each other after starting.

[0047] After the start button is pressed, the relay JDQ is attracted, OFF2 becomes 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 positive, and then the output end of U18B outputs a low level signal. The low level signal is transmitted to the upper rectification trigger unit through the protection resistor R29 and the diode D26. After the trigger end of the rectification trigger unit changes from high level to low level, the rectification 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 the charging is completed, the negative terminal of the comparator U18A changes from low level to high level, and exceeds the sampling voltage. After the output end of the comparator U18A changes from high level to low level, the negative terminal of the diode D25 changes from high level to low level. After the resistor R36, the diode D1 discharges the high level through the resistor R37 to the ground, and gives a low level signal to the inverter U13. After the inverter U13 is inverted to high level, the inverter pulse output unit is triggered to start working.

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

[0050] The capacitor C27 compares the capacitor C26 delay charging and discharging time, and ends about 1 second later. The diode D25 outputs a high level signal. After passing through the charging and discharging circuit composed of the resistor R36 and the capacitor C30, the high level signal output to the pin 9 of the inverter U13 has a delay of about 0.5 seconds. To ensure that the rectification trigger unit stops before the inverter pulse unit after the device stops, the power of the main circuit of the device is discharged through the inverter load, so as to avoid the impact on the rectification unit of the main circuit.

[0051] After the power regulation unit receives the power regulation signal, the signal is transmitted to the control board after anti-interference processing, and then the chip unit signal processing is output to output the instruction of regulating power.

[0052] The power regulating unit comprises a regulating chip U21, one end of a resistor R204 connected to the 4-pin of the regulating chip U21, one end of the resistor R204 connected to a bipolar diode VT1, one end of the bipolar diode VT1 connected to a resistor RL, one end of the resistor RL connected to the 5-pin of the regulating chip U21 through a resistor R205, the other end of the bipolar diode VT1 connected to a resistor R203, one end of the resistor R203 connected in parallel to light emitting diodes VL1, VL2 and VL3, and the light emitting diodes VL1, VL2 and VL3 connected to the 6-pin, 8-pin and 1-pin of the regulating chip U21 respectively, the 7-pin and 3-pin of the regulating chip U21 connected in parallel to a capacitor C203 and a switch S2, the 2-pin of the regulating chip U21 connected in parallel to a resistor R201, a capacitor C201, a diode VS1 and a diode VD1 between the connection end of the switch S2, one end of the diode VD1 connected to a capacitor C202, one end of the capacitor C202 connected to a resistor R202, one end of the resistor R202 connected to a diode VD2, and one end of the diode VD2 connected to one end of the diode VS1, through the regulating chip U21 and the surrounding resistors, capacitors, diodes and other components, the accurate control and protection of the power in the circuit are realized.

[0053] After the rectifier trigger unit receives the starting action, the chip unit will issue an instruction to output a rectifier pulse to control the main loop thyristor to remain in a fully open state.

[0054] The rectifier trigger unit comprises a rectifier BG2 and a thyristor U10, the 3-pin and 2-pin of the thyristor U10 connected to a capacitor CD8, the 1-pin and 2-pin of the thyristor U10 connected to a capacitor CD9, and the capacitor CD9 connected between the 1-pin and 4-pin of the rectifier BG2, the 2-pin and 3-pin of the rectifier BG2 connected to a receiving terminal J5, when the rectifier trigger unit receives a power regulating signal, the chip unit will perform logical operation, then transmit to the chip unit after signal processing, through controlling the conduction and shutdown of the thyristor, the accurate control of the power in the circuit is realized.

[0055] The inverter pulse output unit will enhance and amplify the pulse signal output by the chip unit after the rectifier trigger unit works, and output to the main loop to control the inverter element to work.

[0056] The inverse pulse output unit comprises a transistor Q101 and a transistor Q102 connected with the transistor Q101, a capacitor C101 and a diode D101 connected between the drain and the source of the transistor Q101, an inductor L102 connected with the diode D101 and the capacitor C101, an end of the inductor L102 connected with a resistor R102, one end of the resistor R102 connected with the other end of the diode D101, a resistor R106 connected with the capacitor C101 and the inductor L102, one end of the resistor R106 connected with an operation unit U7, the output end of the operation unit U7 connected with a resistor R109 and a resistor R110 in series, the positive end of the operation unit U7 connected with a resistor R108, a resistor R107 and a capacitor C104 in parallel with the connection end of the resistor R106, an inductor L101 connected with the drain of the transistor Q101, an end of the inductor L101 connected with a resistor R101, one end of the resistor R101 connected with a resistor R104, one end of the resistor R104 connected with the drain of the transistor Q102, a capacitor C102, a resistor R105 and an inductor L103 connected between the drain and the source of the transistor Q102, a resistor R103 connected with the capacitor C102 and the resistor R105, one end of the resistor R103 connected with the other end of the capacitor C102, the operation unit U7, the resistor R106, the resistor R108, the resistor R107 and the capacitor C104 forming a feedback network for stabilizing the output of the operation unit and reducing noise interference, and the output voltage and frequency being flexibly controlled by adjusting the on-off time interval of the transistors Q101 and Q102.

[0057] The line protection unit collects current and voltage signals in the main circuit, and makes protection action after operation and processing by the chip unit.

[0058] The line protection unit includes transistor Q22, transistor Q21 and connection terminal J3, the transistor Q21 is connected to the 1 pin 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 with the resistor RS1, the diode VZ1 is connected between the drain and the source of the transistor Q22, one end of the diode VZ1 is connected with the resistor RS2, one end of the resistor RS2 is connected with the diode DS2, one end of the diode DS2 is connected with the drain of the transistor Q21, the drain of the transistor Q21 is connected in parallel with the resistor RS3 and the capacitor C2 at the connection end of the connection terminal J3, the diode DS1 is connected at the connection end of the capacitor C2 and the resistor RS3, one end of the diode DS1 is connected with the source of the transistor Q21, the diode VZ1 is connected between the drain and the source of the transistor Q22, which plays a role of voltage stabilization or protection, prevents the transistor from being damaged by high voltage, the diode DS2 is connected to the drain of the transistor Q21 for rectification or protection, ensures that the current can only flow in one direction, the transistor Q21, the connection terminal J3, the resistor RS3 and the capacitor C2 constitute a feedback network for stabilizing the working state of the circuit, the diode DS1 is further connected at the connection end of the capacitor C2 and the resistor RS3 for rectification or protection, which ensures that the power supply can be quickly cut off or other protection measures can be taken when the circuit fails or abnormally, thereby protecting the safety of the circuit and the equipment.

[0059] In operation, the double-layer PCB structure is adopted, the power supply unit, the rectification trigger unit and the inverter pulse output unit, three types of units using many heating elements, are distributed at the edge position of the circuit board, avoiding thermal radiation interference on the entire line, the signal of the power control unit needs to increase anti-interference processing to avoid the control board sending incorrect action instructions due to peripheral interference signals, and the line protection action is to cut off the rectification pulse signal first and then cut off the inverter pulse output, which can avoid the main loop inverter part directly releasing high-voltage large current to the external inductor, reducing the reverse impact on the upstream rectification unit, the entire electrical circuit is processed by the chip internal logic array assembly, multiple electronic components are integrated into the same chip, and the circuit design with complex functions is realized; the PLC automatic control system is increased, the Internet of Things online technology is introduced, the chip function and compatibility are expanded, the digital management and intelligent control function of the main control board chip are realized; 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 of the control circuit board, the appearance is more beautiful and delicate, and has a sense of technology.

[0060] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood that modifications can be made to the foregoing embodiments, or additional implementations of the present application can be implemented, without departing from the spirit or scope of the application. Accordingly, the present application is not limited except as by the appended claims.

Claims

1. A chip control panel for a suspension furnace, characterized by: The utility model relates to a kind of power supply protection system, including: Chip unit, each unit feedback information is received in real time by programmable logic chip internal program, control whole system stable operation after logic operation, if system appears abnormal, according to line feedback signal, output protection action signal is handled to judge;The chip unit includes single-chip microcomputer U3, resistance R41 and crystal oscillator Y1 are connected in parallel between the 2 feet and 3 feet of the single-chip microcomputer U3, the both ends of the crystal oscillator Y1 are connected with capacitor C31 and capacitor C32 respectively, the one end of the capacitor C31 and the one end of capacitor C32 are all grounded, the 5 feet of the single-chip microcomputer U3 are connected with capacitor C4, the one end of the capacitor C4 is connected with capacitor C5, the one end of the capacitor C5 is connected with the 4 feet of single-chip microcomputer U3, resistance R11 and diode D4 are connected in parallel on the 4 feet connection end of the capacitor C5 and single-chip microcomputer U3, the 31 feet and 32 feet of the single-chip microcomputer U3 are connected with capacitor C3, the 31 feet connection end of the capacitor C3 and single-chip microcomputer U3 is connected with ground resistance R9, the 17 feet of the single-chip microcomputer U3 is connected with ground capacitor C22; PLC unit, the PLC unit is used for connecting peripheral control signal transmission, receives the input of self-setting protection value;The PLC unit includes PLC controller U12, a plurality of control switches SB are connected in parallel on the PLC controller U12, the Y0 feet of the PLC controller U12 are connected with relay KM2, one end of the relay KM2 is connected with the L feet of the PLC controller U12, the N feet of the PLC controller U12 is connected with COM1 feet; Power supply unit, the power supply unit is 220V power signal stabilized to positive and negative 15V and positive 5V signal to the control board stable operation; Start delay unit, the start delay unit is used to automatically control operation sequence after receiving start command; Power regulation unit, after receiving power regulation signal, the power regulation unit is transmitted to control board after anti-interference processing, then the instruction of regulation power is output after signal processing of chip unit; Rectification trigger unit, after receiving start action, the chip unit will issue instruction output rectification pulse, and control main loop thyristor element keeps full open state; Inverter pulse output unit, after rectification trigger unit works, the pulse signal output by chip unit is enhanced and amplified, and output to main loop to control inverter element work; Line protection unit, the line protection unit collects current and voltage signal in main loop, and makes protection action after chip unit operation processing; The chip unit, PLC unit, line protection unit, start delay unit, power regulation unit, rectification trigger unit and inverter pulse output unit are integrated on the circuit board, and the power supply unit is unidirectionally connected with the chip unit. In operation, the power supply unit, rectification trigger unit, inverter pulse output unit, three types of units using more heating elements are distributed at the edge of the circuit board, the power control unit signal, line protection action, is in the chip output protection instruction, cut off rectification pulse signal, after cutting off the inverter pulse output, can avoid the main circuit inverter part, high voltage and large current directly to the external inductance release, reduce the reverse impact on the upstream rectification unit, through the whole electrical circuit, suitable for integrated logic circuit through the chip internal logic array assembly to handle, multiple electronic components integrated into the same chip.

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

3. A chip control board for a suspension furnace according to claim 2, characterized in that: The power supply unit includes a power supply chip U1, a coupling chip U2, a rectifier BD and a transformer T1, an inductive end of the coupling chip U2 is connected with the power supply 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 with the 2 pin of the coupling chip U2 through a voltage stabilizing diode U4, the transformer T1 is connected on a control end of the power supply 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 resistor R4 and a connecting end of the capacitor C50 are connected with the control end of the power supply chip U1 through a diode D67, the capacitor C45 is connected between the 3 pin and the 4 pin of the rectifier BD, the other end of the rectifier BD is connected with a common mode inductor LF1, one end of the common mode inductor LF1 is connected in parallel with a capacitor CX1, a voltage-dependent resistor MOV and a resistor R1 and a resistor R2 arranged in series, one end of the voltage-dependent resistor MOV1 is connected with a fuse FUSE, the other end of the transformer T1 is connected with 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, a connecting end of the diode D7 and the resistor R12 is connected with a ground capacitor C10, a connecting end of the diode D8 and the resistor R13 is connected with an inductor L1 1, two ends of the inductor L1 1 are respectively connected with a ground C9 and a ground C11.

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

5. A chip control board for a suspension furnace according to claim 4, characterized in that: The rectifier triggering unit comprises a rectifier BG2 and a thyristor U10, a capacitor CD8 connected between the 3-pin and 2-pin of the thyristor U10, a capacitor CD9 connected between the 1-pin and 2-pin of the thyristor U10, and the capacitor CD9 connected between the 1-pin and 4-pin of the rectifier BG2, the 2-pin and 3-pin of the rectifier BG2 connected to a receiving terminal J5.

6. A chip control board for a suspension furnace according to claim 5, characterized in that: The inverter pulse output unit comprises a transistor Q101 and a transistor Q102 connected to the transistor Q101, a capacitor C101 and a diode D101 connected between the drain and source of the transistor Q101, an inductor L102 connected to the connection end of the diode D101 and the capacitor C101, a resistor R102 connected to one end of the inductor L102, the other end of the diode D101 and one end of the resistor R102, a resistor R106 connected to the connection end of the capacitor C101 and the inductor L102, an operational amplifier U7 connected to one end of the resistor R106, a resistor R109 and a resistor R110 connected in series to the output end of the operational amplifier U7, a resistor R108, a resistor R107 and a capacitor C104 connected in parallel to the connection end of the resistor R106 and the positive end of the operational amplifier U7, an inductor L101 connected to the drain of the transistor Q101, a resistor R101 connected to one end of the inductor L101, a resistor R104 connected to one end of the resistor R101, the drain of the transistor Q102 connected to one end of the resistor R104, a capacitor C102, a resistor R105 and an inductor L103 connected between the drain and source of the transistor Q102, a resistor R103 connected to the connection end of the capacitor C102 and the resistor R105, and the other end of the capacitor C102 and one end of the resistor R103.

7. A chip control board for a suspension furnace according to claim 6, characterized in that: The line protection unit comprises a transistor Q22, a transistor Q21 and a connection terminal J3, the transistor Q21 is connected to the 1 pin 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 with a resistor RS1, the drain and the source of the transistor Q22 are connected with a diode VZ1, one end of the diode VZ1 is connected with a resistor RS2, one end of the resistor RS2 is connected with a diode DS2, one end of the diode DS2 is connected with the drain of the transistor Q21, the drain of the transistor Q21 is connected in parallel with a resistor RS3 and a capacitor C2 on the connection end of the connection terminal J3, the connection end of the capacitor C2 and the resistor RS3 is connected with a diode DS1, one end of the diode DS1 is connected with the source of the transistor Q21.

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