Electric arc stove and electric arc stove power supply control board

Abstract

The utility model provides an electric arc stove and a power supply control board of the electric arc stove. The power supply control board of the electric arc stove comprises a microcontroller module, a filtering current stabilization module, an alternating current-direct current conversion module, an inversion boosting module, a direct current-alternating current conversion driving module and a high-voltage pack module, the input end of the filtering current-stabilizing module is connected with a two-phase power supply of a commercial power grid, the output end of the filtering current-stabilizing module is connected with the input end of the AC-DC conversion module, the output end of the AC-DC conversion module is connected with the input end of the inversion boost module, and the output end of the inversion boost module is connected with the input end of the DC-AC conversion driving module. The output end of the direct current-alternating current conversion driving module is connected with a copper coil electric arc stove for heating; the AC-DC conversion control signal output end of the microcontroller module is connected with the control signal input end of the AC-DC conversion module, and the DC-AC conversion signal output end of the microcontroller module is connected with the control signal input end of the DC-AC conversion driving module.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen utensils of electric energy drive especially an electric arc stove and electric arc stove power control panel. BACKGROUND

[0002] The kitchen utensils in prior art are of two types: one type is to use traditional wood, coal, natural gas and other energy sources to produce open fire, and the other type is to use electromagnetic oven to directly heat the pot without producing open fire. The traditional energy sources will produce smoke and other waste gas, affecting the health of the user. The kitchen utensils of the electromagnetic oven type are very clean and convenient, but the cooking flavor is not as good as that of the open fire stove. If an electric stove that can convert electric energy into open fire heat energy, has high node temperature, releases small amount of heat to the surroundings, has high heat energy conversion efficiency and fast cooking time can be provided, the shortcomings of the prior art can be avoided, open fire can be produced, and the electric stove is clean and environmentally friendly, providing a better electric stove for the user. SUMMARY

[0003] To solve the above technical problems, the utility model provides an electric arc stove and electric arc stove power control panel.

[0004] A power control panel of an electric arc stove, comprising: a microcontroller module, a filter and stabilizer module, an AC-DC conversion module, an inverter and booster module, a DC-AC conversion and driving module, and a high-voltage package module; the input end of the filter and stabilizer module is connected to a two-phase power supply of a power grid, the output end of the filter and stabilizer module is connected to the input end of the AC-DC conversion module, the output end of the AC-DC conversion module is connected to the input end of the inverter and booster module, the output end of the inverter and booster module is connected to the input end of the DC-AC conversion and driving module, and the output end of the DC-AC conversion and driving module is connected to a copper coil electric arc stove for heating; the AC-DC conversion control signal output end of the microcontroller module is connected to the control signal input end of the AC-DC conversion module, and the DC-AC conversion signal output end of the microcontroller module is connected to the control signal input end of the DC-AC conversion and driving module; the two pins of the AC power output end of the DC-AC conversion and driving module are used for parallel connection at both ends of the copper coil of the electric arc stove; and the high-voltage package module is used for parallel connection at both ends of the copper coil of the electric arc stove and between the two pins of the AC power output end of the DC-AC conversion and driving module.

[0005] The filter and steady current module sends the filtered and steady current processed input mains power to the power input end of the AC-DC conversion module, the AC-DC conversion module receives the AC-DC conversion control signal of the microcontroller module, the AC-DC conversion module converts the input AC power into DC power and sends it to the power input end of the inverter and voltage boosting module, the inverter and voltage boosting module boosts the received DC power and sends it to the power input end of the DC-AC conversion and driving module, the control signal input end of the DC-AC conversion and driving module receives the DC-AC conversion signal of the microcontroller module, the DC-AC conversion and driving module converts the DC power into AC power and sends it to the copper coil of the electric arc stove, the high-voltage pack module is used for processing the AC power into high-voltage, and the DC-AC conversion and driving module and the high-voltage pack module act on the copper coil of the electric arc stove at the same time, the copper coil of the electric arc stove emits high-temperature electric arc to form a visible fire for heating work.

[0006] Further, the electric arc stove power supply control board, wherein the filter and steady current module comprises a zero sequence current transformer unit and an EMI filter unit:

[0007] The zero sequence current transformer unit comprises a zero sequence current transformer, a ground wire detection circuit and a phase sequence matching signal transmission circuit.

[0008] The live wire pin of the mains input end of the zero sequence current transformer is connected to the live wire L of the mains power supply, the zero wire pin of the mains input end of the zero sequence current transformer is connected to the zero wire N of the mains power supply, the live wire pin of the mains output end of the zero sequence current transformer is connected to the first pin of the input end of the EMI filter, the zero wire pin of the mains output end of the zero sequence current transformer is connected to the second pin of the input end of the EMI filter, the first current transformer inside the zero sequence current transformer is connected between the live wire pin of the mains output end of the zero sequence current transformer and the live wire pin of the mains input end of the zero sequence current transformer, the second current transformer inside the zero sequence current transformer is connected between the zero wire pin of the mains output end of the zero sequence current transformer and the zero wire pin of the mains input end of the zero sequence current transformer, and the zero sequence current transformer further has a detection signal output end, the L phase detection signal output pin of the detection signal output end corresponds to the L phase of the mains, and the N phase detection signal output pin of the detection signal output end corresponds to the N phase of the mains.

[0009] The phase sequence matching signal transmission circuit comprises a second rectifier bridge and a seventeenth resistor, the second rectifier bridge is composed of four diodes, the L phase AC signal input pin of the second rectifier bridge is connected to the L phase detection signal output pin of the zero sequence current transformer, the N phase AC signal input pin of the second rectifier bridge is connected to the N phase detection signal output pin of the zero sequence current transformer, the DC signal positive output pin of the second rectifier bridge is connected to the first phase sequence signal input pin of the microcontroller after being connected to the seventeenth resistor in series, and the DC signal negative output pin 1 of the second rectifier bridge is connected to the second phase sequence signal input pin of the microcontroller.

[0010] The microcontroller module is used for phase sequence comparison of the first and second phase sequence signals of the first phase sequence signal input pin and the second phase sequence signal input pin, judging whether the phase sequence is accurate or not, and outputting corresponding information;

[0011] The ground detection circuit comprises a twenty-first voltage dividing resistor, a twenty-second voltage dividing resistor, a first optoelectronic coupler, a twenty-third voltage dividing resistor, a ground detection chip, a twenty-fifth voltage dividing resistor, a twenty-sixth voltage dividing resistor, a second optoelectronic coupler and a twenty-seventh voltage dividing resistor; one end of a series circuit composed of the twenty-first voltage dividing resistor and the twenty-second voltage dividing resistor is connected to a live wire L pin of a commercial power supply, the other end is connected to a positive electrode of a light-emitting diode side of the first optoelectronic coupler, a negative electrode of the light-emitting diode side of the first optoelectronic coupler is grounded, an input pin of a light-sensitive element side of the first optoelectronic coupler is connected to a 3.3V direct current power supply through the twenty-third voltage dividing resistor, the input pin of the light-sensitive element side of the first optoelectronic coupler is connected to a live wire detection input pin of the ground detection chip through an intermediate junction point of the twenty-third voltage dividing resistor, and an output pin of the light-sensitive element side of the first optoelectronic coupler is grounded;

[0012] One end of a series circuit composed of the twenty-fifth voltage dividing resistor and the twenty-sixth voltage dividing resistor is connected to a neutral wire N pin of the commercial power supply, the other end is connected to a positive electrode of a light-emitting diode side of the second optoelectronic coupler, a negative electrode of the light-emitting diode side of the second optoelectronic coupler is grounded, an input pin of a light-sensitive element side of the second optoelectronic coupler is connected to the 3.3V direct current power supply through the twenty-seventh voltage dividing resistor, the input pin of the light-sensitive element side of the second optoelectronic coupler is connected to a neutral wire detection input pin of the ground detection chip through an intermediate junction point of the twenty-seventh voltage dividing resistor, and an output pin of the light-sensitive element side of the first optoelectronic coupler is grounded;

[0013] A ground detection signal output pin of the ground detection chip is connected to a ground detection signal input pin of the microcontroller module;

[0014] The live wire L of the commercial power supply is connected to the light-emitting diode side of the first optoelectronic coupler between the live wire L and a grounding end GD, the light-emitting diode of the first optoelectronic coupler is powered, the live wire detection input pin of the ground detection chip obtains a voltage, similarly, the neutral wire N of the commercial power supply is connected to the light-emitting diode side of the second optoelectronic coupler between the neutral wire N and the grounding end GD, the light-emitting diode of the second optoelectronic coupler is powered, the neutral wire detection input pin of the ground detection chip obtains a voltage, the ground detection chip performs an AND gate logic on the levels of the live wire detection input pin and the neutral wire detection input pin, and the ground detection chip sends a ground detection signal to the ground detection signal input pin of the microcontroller module through the ground detection signal output pin; when the ground detection signal output pin of the ground detection chip is a high level, it indicates that the ground line is normally connected, and when the ground detection signal output pin of the ground detection chip is a low level, it indicates that the ground line is not normally connected;

[0015] The live wire L and the neutral wire N of the commercial power are correctly connected to the live wire input pin and the neutral wire input pin of the zero sequence current transformer, when there is working current, the L-phase detection signal output pin and the N-phase detection signal output pin of the zero sequence current transformer will output the inducted current of the same phase in proportion, after the second rectifier bridge detection, the signals are sent to the first phase sequence signal input pin and the second phase sequence signal input pin of the microcontroller module, the microcontroller module obtains the voltage variation zero-crossing period from the signals, and matches the phase sequence with the ground detection signal received by the ground detection signal input pin, judges whether the sequence of the zero wire, the live wire and the ground wire is correct, and calculates the input current size through the amplitude at the same time;

[0016] The first capacitor is connected between the live wire pin of the commercial power output end of the zero sequence current transformer and the ground end GND; the second capacitor is connected between the neutral wire pin of the commercial power output end of the zero sequence current transformer and the ground end GND, the first capacitor and the second capacitor are used to form a reactive power compensation circuit; the first capacitor is further connected with a first voltage-dependent resistor in parallel, and the second capacitor is further connected with a second voltage-dependent resistor in parallel, the first voltage-dependent resistor and the second voltage-dependent resistor are used to absorb the impact impulse voltage in the connected commercial power grid;

[0017] The EMI filter unit includes a second filter capacitor, a current stabilizing circuit, and a third filter inductor, the current stabilizing circuit includes a twenty-ninth resistor, a thirty-first resistor, and a thirty-fourth resistor, the twenty-ninth resistor, the thirty-first resistor, and the thirty-fourth resistor are connected in series to form a series circuit, the second filter capacitor and the current stabilizing circuit are connected in parallel between the live wire pin and the neutral wire pin of the commercial power output end of the zero sequence current transformer; the two input end pins of the third filter inductor are respectively connected to the two ends of the current stabilizing circuit, and the two output end pins of the third filter inductor are respectively connected to the two power input end pins of the AC-DC conversion module;

[0018] The third filter inductor is used to filter the white noise interference of the connected commercial power grid; the second filter capacitor is used to eliminate the interference caused by the power grid;

[0019] The AC-DC conversion module includes a control unit and an AC-DC conversion unit, the control unit includes a first main circuit and a second slow start circuit; the AC-DC conversion unit includes a first rectifier bridge composed of four diodes;

[0020] The second slow start circuit comprises a second relay, a load resistor matrix, a ninth MOS transistor, an eleventh diode, a thirtieth load resistor, one end of the normally open contact point of the second relay is connected to the live wire L output pin of the third filter inductor, the other end is connected to the input end of the load resistor matrix, the output end of the load resistor matrix is used for connecting the AC input end L phase connecting pin of the first rectifier bridge in the AC-DC conversion unit, the AC input end N phase connecting pin of the first rectifier bridge is connected to the zero line N output pin of the third filter inductor; one end of the coil of the second relay is connected to a +12V DC power supply, the other end is connected to the source electrode of the ninth MOS transistor, the source electrode of the ninth MOS transistor and the +12V DC power supply are further connected with the eleventh diode, the positive electrode of the eleventh diode is connected to the source electrode of the ninth MOS transistor, and the negative electrode of the eleventh diode is connected to the +12V DC power supply; the gate electrode of the ninth MOS transistor is connected to the slow start drive signal output pin of the microcontroller module, the thirtieth load resistor is connected in series between the gate electrode and the drain electrode of the ninth MOS transistor, and the drain electrode of the ninth MOS transistor is grounded; when the slow start drive signal output pin of the microcontroller module outputs a high level signal, the ninth MOS transistor is turned on, the second slow start circuit is enabled, and the second slow start circuit controls the slow start due to the action of the load resistor matrix;

[0021] The first main circuit comprises a first relay, an eighth MOS transistor, a seventh diode, a twenty-fourth load resistor, one end of the normally open contact point of the first relay is connected to the live wire L output pin of the third filter inductor, and the other end is also connected to the AC input end L phase connecting pin of the first rectifier bridge in the AC-DC conversion unit; one end of the coil of the second relay is connected to a +12V DC power supply, the other end is connected to the source electrode of the eighth MOS transistor, the source electrode of the eighth MOS transistor and the +12V DC power supply are further connected with the seventh diode, the positive electrode of the seventh diode is connected to the source electrode of the eighth MOS transistor, and the negative electrode of the seventh diode is connected to the +12V DC power supply; the gate electrode of the eighth MOS transistor is connected to the main circuit drive signal output pin of the microcontroller module, the twenty-fourth load resistor is connected in series between the gate electrode and the drain electrode of the eighth MOS transistor, and the drain electrode of the eighth MOS transistor is grounded; when the main circuit drive signal output pin of the microcontroller module outputs a high level signal, the eighth MOS transistor is turned on, and the first main circuit is enabled;

[0022] The main circuit drive signal output pin and the slow start drive signal output pin of the microcontroller module do not output high level signals at the same time;

[0023] The inverter boost module comprises a PFC power factor correction unit, a BOOST boost circuit, an energy storage circuit and a BUCK step-down circuit; the energy storage circuit comprises a seventh energy storage capacitor and an eighth energy storage capacitor connected in parallel; the PFC power factor correction unit comprises a PFC power factor correction chip;

[0024] The BOOST voltage boosting circuit comprises a ninth diode, a tenth capacitor, a second inductor, a tenth MOS triode, a twelfth diode, a twenty-eighth capacitor, a twenty-seventh capacitor, a first isolation diode, a thirty-second resistor, the positive and negative poles of the tenth capacitor are connected in parallel between the positive and negative pole pins of the direct current output end of the first rectifier bridge, the input end of the second inductor is connected to the positive pole pin of the direct current output end of the first rectifier bridge, the input end of the second inductor is also connected to the PFC power factor correction voltage VBIN output pin of the PFC power factor correction chip, the output end of the second inductor is connected to the source of the tenth MOS triode, the gate of the tenth MOS triode is connected to the boost control signal PFC_DRV output pin of the PFC power factor correction chip, the gate and the drain of the tenth MOS triode are connected to the parallel circuit composed of the first isolation diode and the thirty-second resistor, and the drain of the tenth MOS triode is grounded; the twenty-seventh capacitor is connected in parallel between the source and the drain of the tenth MOS triode; the output end of the second inductor is also connected to the positive pole of the twelfth diode, the negative pole of the twelfth diode is connected to the parallel positive pole of the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit, the twenty-eighth capacitor is connected in parallel to the twelfth diode, the positive pole of the ninth diode is connected to the PFC power factor correction voltage VBIN output pin of the PFC power factor correction chip, and the negative pole of the ninth diode is connected to the negative pole of the twelfth diode; the positive pole of the energy storage circuit is connected to the voltage input end of the direct current-alternating current conversion driving module, the positive pole of the energy storage circuit outputs the voltage BUS, and the positive pole of the energy storage circuit is also connected to the boost feedback signal BUS input pin of the PFC power factor correction chip;

[0025] The BUCK voltage reducing circuit comprises a parallel circuit composed of three parallel ninth capacitors, twenty-ninth capacitors and thirtieth capacitors, and a series circuit composed of three load resistors, i.e., seventy-sixth load resistor, seventy-seventh load resistor and seventy-eighth load resistor, which are connected in series, and the series circuit composed of the seventy-sixth load resistor, the seventy-seventh load resistor and the seventy-eighth load resistor is connected in parallel to the ninth capacitor, the twenty-ninth capacitor and the thirtieth capacitor; the parallel circuit composed of the ninth capacitor, the twenty-ninth capacitor and the thirtieth capacitor is also connected in parallel to the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit;

[0026] The output energy of the two output terminal pins of the third filter inductor is sent into the two AC signal input pins of the first rectifier bridge through the first main circuit or the second soft start circuit, the first rectifier bridge is composed of four diodes, and AC power is converted into DC power through chopper as a DC system supplier; the positive pole of the DC output terminal of the first rectifier bridge provides energy for the seventh energy storage capacitor and the eighth energy storage capacitor through the second inductor and the twelfth diode; the tenth MOS triode boosts the DC power under the driving of the PFC power factor correction chip, and the ninth diode is used for freewheeling; the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit are controlled by the switching state of the tenth MOS triode; the PFC power factor correction chip feeds back the BUS voltage of the switching of the ninth MOS triode in the second soft start circuit in the AC-DC conversion module through the voltage feedback signal BUS input pin, and the output voltage BUS of the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit is more stable; the voltage output by the BOOST boost circuit and the voltage of the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit are cycled through the ninth capacitor, the twenty-ninth capacitor, the thirtieth capacitor, the seventy-sixth load resistor, the seventy-seventh load resistor and the seventy-eighth load resistor in the BUCK step-down circuit, and the positive pole voltage BUS of the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit is further stabilized;

[0027] The DC-AC conversion driving module includes first, second, third and fourth driving circuits and an arc stove voltage detection circuit, the four driving circuits are the same in structure and each include a MOS triode, the MOS triodes included in the first, second, third and fourth driving circuits are first, second, third and fourth MOS triodes respectively; the arc stove voltage detection circuit includes a voltage detection chip, a second current transformer, a full-bridge rectifier bridge, an RC filter circuit and a voltage dividing circuit;

[0028] The sources of the first and second MOS triodes are respectively connected to the positive pole of the energy storage circuit in the inverter boost module, i.e. the voltage output terminal, for receiving DC voltage BUS, the drain of the first MOS triode is connected to the source of the third MOS triode, and the drain of the second MOS triode is connected to the source of the fourth MOS triode;

[0029] The first driving circuit further includes a first isolation circuit composed of an eightieth resistor and a first capacitor in series, and the first isolation circuit is connected in parallel between the source and the drain of the first MOS triode;

[0030] The second driving circuit further includes a second isolation circuit composed of an eighty-first resistor and a second capacitor in series, and the second isolation circuit is connected in parallel between the source and the drain of the second MOS triode;

[0031] The third driving circuit further comprises a third isolation circuit composed of an eighty-second resistor and a third capacitor in series, and the third isolation circuit is connected in parallel between the source and the drain of the third MOS triode;

[0032] The fourth driving circuit further comprises a fourth isolation circuit composed of an eighty-third resistor and a fourth capacitor in series, and the fourth isolation circuit is connected in parallel between the source and the drain of the fourth MOS triode;

[0033] In the arc stove voltage detection circuit, the first pin of the primary side winding of the second current transformer is connected to the intermediate junction between the drain of the first MOS triode and the source of the third MOS triode, and the second pin of the primary side winding of the second current transformer is connected to the first pin of the arc stove copper coil, forming a series connection relationship, for detecting the current passing through the arc stove copper coil;

[0034] The two pins of the secondary side winding of the second current transformer are connected to the rectified signal input end of the full-bridge rectifier bridge; the RC filter circuit comprises a resistor series circuit composed of an sixty-third resistor, a twentieth resistor and an sixty-fourth resistor in series, and a twenty-first capacitor, the twenty-first capacitor is connected in parallel with the resistor series circuit, and the resistor series circuit and the twenty-first capacitor are connected in parallel with the two pins of the rectified signal output end of the full-bridge rectifier bridge in turn; the positive signal output end of the RC filter circuit is connected to the voltage detection signal input end of the voltage detection chip through a voltage dividing circuit; the voltage detection signal output end of the voltage detection chip is connected to the arc stove copper coil voltage detection signal input end of the microcontroller module;

[0035] The DC-AC conversion driving module converts DC into AC and sends it to the copper coil of the arc stove, and the high-voltage package module is used to process the AC into high voltage; the DC-AC conversion driving module and the high-voltage package module act on the arc stove copper coil at the same time, the arc stove copper coil emits high-temperature arc to form a visible fire for heating work;

[0036] In the arc stove voltage detection circuit, the primary side winding of the second current transformer passes through high-voltage current, and the secondary side of the second current transformer is correspondingly converted into low-voltage current and sent to the rectified signal input end of the full-bridge rectifier bridge; the full-bridge rectifier bridge rectifies the DC current sent by the rectified signal input end into DC current, and sends it to the RC filter circuit; the current is formed on the resistor series circuit composed of the sixty-third resistor, the twentieth resistor and the sixty-fourth resistor in series, and the positive voltage is converted on the twenty-first capacitor; the positive voltage is sent to the voltage detection signal input end of the voltage detection chip through the voltage dividing circuit;

[0037] In the first half of a cycle, the microcontroller module controls its first drive circuit control signal output pin and fourth drive circuit control signal output pin to output high level signals at the same time, the first MOS triode and the fourth MOS triode are turned on, the direct current voltage BUS output by the inverter voltage boosting module is transmitted to the first end connecting pin of the arc copper coil through the source and drain of the first MOS triode of the first drive circuit and the primary side winding of the second current transformer, when passing through the arc copper coil, high temperature arc is generated in the arc copper coil under the joint action of the high voltage package module, then transmitted to the source of the fourth MOS triode through the second end connecting pin of the arc copper coil, and finally transmitted to the ground terminal through the drain of the fourth MOS triode;

[0038] In the second half of a cycle, the microcontroller module controls its third drive circuit control signal output pin and second drive circuit control signal output pin to output high level signals at the same time, the third MOS triode and the second MOS triode are turned on, the direct current voltage BUS output by the inverter voltage boosting module is transmitted to the second end connecting pin of the arc copper coil through the source and drain of the second MOS triode of the second drive circuit, when passing through the arc copper coil, high temperature arc is generated in the arc copper coil under the joint action of the high voltage package module, then transmitted to the source of the third MOS triode through the first end connecting pin of the arc copper coil and the primary side winding of the second current transformer, and finally transmitted to the voltage detection signal input terminal P+ pin of the voltage detection chip through the drain of the third MOS triode; the voltage detection signal output terminal of the voltage detection chip transmits the voltage detection signal to the arc copper coil voltage detection signal input terminal of the microcontroller module;

[0039] The microcontroller module implements commutating drive control on the arc according to the mode of switching at the same time of the front half cycle and the rear half cycle: the first MOS triode and the fourth MOS triode are turned on in the front half cycle, the second MOS triode and the third MOS triode are turned on in the rear half cycle, then the next cycle is carried out, and the cycle is carried out, so that direct current signals are converted into alternating current signals, and the arc copper coil is driven to generate arc heating.

[0040] The utility model further provides an arc stove, wherein, the arc stove power control board as claimed in claim 1 or claim 2 is included.

[0041] The utility model provides an electric arc stove and power control panel of electric arc stove, power control panel is connected with the commercial power AC220V voltage, through conversion converts alternating voltage AC220V into direct current DC450V, passes through inverter boost to 20KV again, and secondary boost to 30KV, produces the bright fire through the arc release of plasma, thereby lets the electric arc produce high temperature, circuit control board total energy consumption 2.5 kilowatt of work, the utility model discloses can convert electric energy into bright fire heat energy, node temperature is high to the release of surrounding heat is small, and the heat conversion efficiency is high cooking time is fast, the utility model discloses the technology in the implementation process, release bright fire or extinguish and will not release harmful gas, and have a large number of negative oxygen release and be beneficial to human body. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 It is the first part of the circuit diagram of the power control panel of the electric arc stove of the utility model;

[0043] Figure 2 It is the second part of the circuit diagram of the power control panel of the electric arc stove of the utility model. DETAILED DESCRIPTION

[0044] The utility model provides an electric arc stove and power control panel of electric arc stove, the power control panel includes: microcontroller module, filter steady flow module, alternating current - direct current conversion module, inverter boost module, direct current - alternating current conversion drive module, high voltage bag module, filter steady flow module's input end connects commercial power grid two phase power, filter steady flow module's output end connects alternating current - direct current conversion module's input end, alternating current - direct current conversion module's output end connects inverter boost module's input end, inverter boost module's output end connects direct current - alternating current conversion drive module's input end, direct current - alternating current conversion drive module's output end connects the copper coil electric arc stove for heat generation, microcontroller module's alternating current - direct current conversion control signal output end connects alternating current - direct current conversion module's control signal input end, microcontroller module's direct current - alternating current conversion signal output end connects direct current - alternating current conversion drive module's control signal input end, direct current - alternating current conversion drive module's alternating current output end two pins are used for parallel connection in the copper coil both ends of electric arc stove, high voltage bag module is used for parallel connection in the both ends of electric arc stove copper coil and simultaneously parallel connection between direct current - alternating current conversion drive module's alternating current output end two pins,

[0045] The filter and stabilizing current module sends the filtered and stabilized input mains power to the power input end of the AC-DC conversion module, the AC-DC conversion module receives the AC-DC conversion control signal of the microcontroller module, the AC-DC conversion module converts the input AC power into DC power and sends it to the power input end of the inverter and voltage boosting module, the inverter and voltage boosting module boosts the received DC power and sends it to the power input end of the DC-AC conversion and driving module, the control signal input end of the DC-AC conversion and driving module receives the DC-AC conversion signal of the microcontroller module, the DC-AC conversion and driving module converts the DC power into AC power and sends it to the copper coil of the electric arc stove, the high-voltage pack module is used to process the AC power into high-voltage, and the DC-AC conversion and driving module and the high-voltage pack module act on the copper coil of the electric arc stove at the same time, the copper coil of the electric arc stove emits high-temperature electric arc to form a visible flame for heating work.

[0046] Figure 1 and Figure 2 The circuit diagram of the power control board is shown in the following figure.

[0047] The filter and stabilizing current module includes a zero-sequence current transformer unit and an EMI filter unit.

[0048] The zero-sequence current transformer unit includes a zero-sequence current transformer CT1, a ground wire detection circuit, and a phase sequence matching signal transmission circuit.

[0049] The live wire pin 4 of the mains access end of the zero-sequence current transformer CT1 is connected to the live wire L of the mains power supply, the neutral wire pin 2 of the mains access end of the zero-sequence current transformer CT1 is connected to the neutral wire N of the mains power supply, the live wire pin 3 of the mains output end of the zero-sequence current transformer CT1 is connected to the input end first pin of the EMI filter, the neutral wire pin 1 of the mains output end of the zero-sequence current transformer CT1 is connected to the input end second pin of the EMI filter, the first current transformer inside the zero-sequence current transformer CT1 is connected between the live wire pin 3 of the mains output end of the zero-sequence current transformer CT1 and the live wire pin 4 of the mains access end of the zero-sequence current transformer CT1, the second current transformer inside the zero-sequence current transformer CT1 is connected between the neutral wire pin 1 of the mains output end of the zero-sequence current transformer CT1 and the neutral wire pin 2 of the mains access end of the zero-sequence current transformer CT1, the zero-sequence current transformer CT1 also has a detection signal output end, the L-phase detection signal output pin 6 of the detection signal output end corresponds to the mains L-phase, and the N-phase detection signal output pin 5 of the detection signal output end corresponds to the mains N-phase.

[0050] The phase sequence matching signal transmission circuit comprises a second rectifier bridge BD2 and a resistor R17. The second rectifier bridge BD2 is composed of four diodes. The L-phase AC signal input pin 1 of the second rectifier bridge BD2 is connected with the L-phase detection signal output pin 6 of the zero sequence current transformer CT1. The N-phase AC signal input pin 3 of the second rectifier bridge BD2 is connected with the N-phase detection signal output pin 5 of the zero sequence current transformer CT1. The DC signal positive output pin 2 of the second rectifier bridge BD2 is connected with the first phase sequence signal input pin CT-B of the microcontroller after being connected with the resistor R17 in series. The DC signal negative output pin 1 of the second rectifier bridge BD2 is connected with the second phase sequence signal input pin CT-A of the microcontroller.

[0051] The microcontroller module is used for comparing the first and second phase sequence signals of the first and second phase sequence signal input pins CT-B and CT-A of the microcontroller, judging whether the phase sequence is accurate or not, and outputting corresponding information.

[0052] The ground wire detection circuit comprises a twenty-first voltage dividing resistor R21, a twenty-second voltage dividing resistor R22, a first optoelectronic coupler IC1, a twenty-third voltage dividing resistor R23, a ground wire detection chip U3, a twenty-fifth voltage dividing resistor R25, a twenty-sixth voltage dividing resistor R26, a second optoelectronic coupler IC2 and a twenty-seventh voltage dividing resistor R27. One end of a series circuit composed of the twenty-first voltage dividing resistor R21 and the twenty-second voltage dividing resistor R22 is connected with the live wire L of the commercial power supply, and the other end is connected with the positive pole 1 of the light emitting diode side of the first optoelectronic coupler IC1. The negative pole 2 of the light emitting diode side of the first optoelectronic coupler IC1 is grounded. The input pin 4 of the light sensitive element side of the first optoelectronic coupler IC1 is connected with the 3.3V DC power supply through the twenty-third voltage dividing resistor R23. The input pin 4 of the light sensitive element side of the first optoelectronic coupler IC1 is connected with the live wire detection input pin 1 of the ground wire detection chip U3 through the intermediate junction point of the twenty-third voltage dividing resistor R23. The output pin 3 of the light sensitive element side of the first optoelectronic coupler IC1 is grounded.

[0053] One end of a series circuit composed of the twenty-fifth voltage dividing resistor R25 and the twenty-sixth voltage dividing resistor R26 is connected with the zero wire N of the commercial power supply, and the other end is connected with the positive pole 1 of the light emitting diode side of the second optoelectronic coupler IC2. The negative pole 2 of the light emitting diode side of the second optoelectronic coupler IC2 is grounded. The input pin 4 of the light sensitive element side of the second optoelectronic coupler IC2 is connected with the 3.3V DC power supply through the twenty-seventh voltage dividing resistor R27. The input pin 4 of the light sensitive element side of the second optoelectronic coupler IC2 is connected with the zero wire detection input pin 2 of the ground wire detection chip U3 through the intermediate junction point of the twenty-seventh voltage dividing resistor R27. The output pin 3 of the light sensitive element side of the first optoelectronic coupler IC1 is grounded.

[0054] The ground detection signal output pin 4 of the ground detection chip U3 is connected to the ground detection signal input pin GD_CC of the microcontroller module.

[0055] The light emitting diode side of the first optocoupler IC1 is connected between the live wire L of the mains and the ground terminal GD, and the light emitting diode of the first optocoupler IC1 is powered, and the pin 1 of the ground detection chip U3 obtains a voltage. Similarly, the light emitting diode side of the second optocoupler IC2 is connected between the neutral wire N of the mains and the ground terminal GD, and the light emitting diode of the second optocoupler IC2 is powered, and the pin 2 of the ground detection chip U3 obtains a voltage. The ground detection chip U3 performs an AND operation on the levels of the pins 1 and 2, and sends the ground detection signal to the ground detection signal input pin GD_CC of the microcontroller module through the ground detection signal output pin 4. When the ground detection signal output pin 4 of the ground detection chip U3 is high, it indicates that the ground is normally connected, and when it is low, it indicates that the ground is not normally connected.

[0056] When the live wire L and the neutral wire N of the mains are correctly connected to the input pins 4 and 2 of the zero sequence current transformer CT1, and when there is a working current, the L-phase detection signal output pin 6 and the N-phase detection signal output pin 5 of the zero sequence current transformer CT1 will output the inducted current of the same phase in proportion. After being detected by the second rectifier bridge BD2, the signal is sent to the first phase sequence signal input pin CT-B and the second phase sequence signal input pin CT-A of the microcontroller module. The microcontroller module obtains the voltage zero-crossing period from the signals, and matches the phase sequence with the ground detection signal received by the ground detection signal input pin GD_CC, to determine whether the sequence of zero, live, and ground is correct, and to calculate the input current size through the amplitude.

[0057] The live wire pin 3 of the mains output terminal of the zero sequence current transformer CT1 is connected to the ground terminal GND through the first capacitor CY1, and the neutral wire pin 1 of the mains output terminal of the zero sequence current transformer CT1 is connected to the ground terminal GND through the second capacitor CY2. The first capacitor CY1 and the second capacitor CY2 are used to form a reactive power compensation circuit. The first capacitor CY1 is also connected in parallel with the first pressure-sensitive resistor RT3, and the second capacitor CY2 is also connected in parallel with the second pressure-sensitive resistor RT6. The first pressure-sensitive resistor RT3 and the second pressure-sensitive resistor RT6 are used to absorb the impulse voltage in the connected mains power grid.

[0058] The EMI filter unit comprises a second filter capacitor X2, a current stabilizing circuit, and a third filter inductor L3. The current stabilizing circuit comprises a twenty-ninth resistor R29, a thirty-first resistor R31, and a thirty-fourth resistor R34, which are connected in series. The second filter capacitor X2 and the current stabilizing circuit are connected in parallel between the live wire pin 3 and the second pin 1 of the AC output terminal of the zero sequence current transformer CT1. The current stabilizing circuit is connected to the two input terminals 3 and 1 of the third filter inductor L3. The two output terminals 4 and 2 of the third filter inductor L3 are connected to the two pins of the power input terminal of the AC-DC conversion module.

[0059] The third filter inductor L3 is used to filter the white noise interference of the connected power grid, avoid the current surge caused by the operation of the switch device in the later stage from being fed back to the power grid, and improve the stability of the entire system. The second filter capacitor X2 is used to eliminate the interference caused by the power grid.

[0060] The AC-DC conversion module comprises a control unit and an AC-DC conversion unit. The control unit comprises a first main circuit and a second slow start circuit. The AC-DC conversion unit comprises a first rectifier bridge BD1 composed of four diodes.

[0061] The second slow start circuit comprises a second relay KJ2, a load resistor matrix, a ninth MOS transistor Q9, an eleventh diode D11, and a thirtieth load resistor R30. One end of the normally open contact of the second relay KJ2 is connected to the live wire L output terminal 4 of the third filter inductor L3, and the other end is connected to the input terminal of the load resistor matrix. The output terminal of the load resistor matrix is used to connect the AC power input terminal L phase connection pin 3 of the first rectifier bridge BD1 in the AC-DC conversion unit. The AC power input terminal N phase connection pin 1 of the first rectifier bridge BD1 is connected to the neutral wire N output terminal 2 of the third filter inductor L3. One end of the coil of the second relay KJ2 is connected to a +12V DC power supply, and the other end is connected to the source of the ninth MOS transistor Q9. The source of the ninth MOS transistor Q9 and the +12V DC power supply are further connected to the eleventh diode D11. The anode of the eleventh diode D11 is connected to the source of the ninth MOS transistor Q9, and the cathode of the eleventh diode D11 is connected to the +12V DC power supply. The gate of the ninth MOS transistor Q9 is connected to the slow start drive signal output pin RLY of the microcontroller module. The gate and the drain of the ninth MOS transistor Q9 are connected in series to the thirtieth load resistor R30, and the drain of the ninth MOS transistor Q9 is grounded. When the slow start drive signal output pin RLY of the microcontroller module outputs a high level signal, the ninth MOS transistor Q9 is turned on, and the second slow start circuit is enabled. Due to the action of the load resistor matrix, the second slow start circuit controls the slow start.

[0062] The first main circuit comprises a first relay KJ1, an eighth MOS transistor Q8, a seventh diode D7, and a twenty-fourth load resistor R24. One end of the normally open contact of the first relay KJ1 is connected to the firewire L output pin 4 of the third filter inductor L3, and the other end is also connected to the L-phase connection pin 4 of the AC input end of the first rectifier bridge BD1 in the AC-DC conversion unit. One end of the coil of the second relay KJ2 is connected to a +12V DC power supply, and the other end is connected to the source of the eighth MOS transistor Q8. The source of the eighth MOS transistor Q8 and the +12V DC power supply are further connected to the seventh diode D7. The anode of the seventh diode D7 is connected to the source of the eighth MOS transistor Q8, and the cathode of the seventh diode D7 is connected to the +12V DC power supply. The gate of the eighth MOS transistor Q8 is connected to the main circuit drive signal output pin RLY-DRV of the microcontroller module. The gate and the drain of the eighth MOS transistor Q8 are connected in series with the twenty-fourth load resistor. The drain of the eighth MOS transistor Q8 is grounded. When the main circuit drive signal output pin RLY-DRV of the microcontroller module outputs a high-level signal, the eighth MOS transistor Q8 is turned on, and the overcurrent on the first main circuit is enabled.

[0063] The main circuit drive signal output pin RLY-DRV and the soft start drive signal output pin RLY of the microcontroller module do not output high-level signals at the same time.

[0064] The inverter boost module comprises a PFC power factor correction unit, a BOOST boost circuit, an energy storage circuit, and a BUCK step-down circuit. The energy storage circuit comprises a seventh energy storage capacitor C7 and an eighth energy storage capacitor C8 connected in parallel. The PFC power factor correction unit comprises a PFC power factor correction chip U4.

[0065] The BOOST voltage boosting circuit comprises a ninth diode D9, a tenth capacitor C10, a second inductor L2, a tenth MOS triode Q10, a twelfth diode D10, a twenty-eighth capacitor, a twenty-seventh capacitor, a first isolation diode, a thirty-second resistor, the positive and negative poles of the tenth capacitor C10 are connected in parallel between the positive pin 2 and the negative pin 4 of the direct current output end of the rectifier bridge BD1, the input end of the second inductor L2 is connected to the positive pin 2 of the direct current output end of the rectifier bridge BD1, the input end of the second inductor L2 is also connected to the PFC power factor correction voltage VBIN output pin 4 B_out of the PFC power factor correction chip U4, the output end of the second inductor L2 is connected to the source of the tenth MOS triode Q10, the gate of the tenth MOS triode Q10 is connected to the boost control signal PFC_DRV output pin 8 of the PFC power factor correction chip U4, the gate and the drain of the tenth MOS triode Q10 are connected to the parallel circuit composed of the first isolation diode DR1 and the thirty-second resistor R32, and the drain of the tenth MOS triode Q10 is grounded; the twenty-seventh capacitor is connected in parallel between the source and the drain of the tenth MOS triode Q10; the output end of the second inductor L2 is also connected to the positive pole of the twelfth diode D10, the negative pole of the twelfth diode D10 is connected to the parallel positive pole of the seventh energy storage capacitor C7 and the eighth energy storage capacitor C8 in the energy storage circuit, the twenty-eighth capacitor is connected in parallel to the twelfth diode D10, the positive pole of the ninth diode D9 is connected to the PFC power factor correction voltage VBIN output pin 4 B_out of the PFC power factor correction chip U4, and the negative pole of the ninth diode D9 is connected to the negative pole of the twelfth diode D10; the positive pole of the energy storage circuit is connected to the voltage input end of the direct current-alternating current conversion driving module, the positive pole of the energy storage circuit outputs the voltage BUS, and the positive pole of the energy storage circuit is also connected to the boost feedback signal BUS input pin 6 FDback of the PFC power factor correction chip U4.

[0066] The BUCK voltage reducing circuit comprises a parallel circuit composed of a ninth capacitor C9, a twenty-ninth capacitor C29 and a thirtieth capacitor C30 connected in parallel in sequence, and a series circuit composed of three load resistors, i.e., a seventy-sixth load resistor R76, a seventy-seventh load resistor R77 and a seventy-eighth load resistor R78 connected in series, and the series circuit composed of the seventy-sixth load resistor R76, the seventy-seventh load resistor R77 and the seventy-eighth load resistor R78 is connected in parallel with the ninth capacitor C9, the twenty-ninth capacitor C29 and the thirtieth capacitor C30; the parallel circuit composed of the ninth capacitor C9, the twenty-ninth capacitor C29 and the thirtieth capacitor C30 is also connected in parallel with the seventh energy storage capacitor C7 and the eighth energy storage capacitor C8 in the energy storage circuit.

[0067] The output energy of the two output terminal pins 4 pin and 2 pin of the third inductor L3 is sent into the two alternating current signal input terminal pins 3 pin and 1 pin of the rectifier bridge BD1 through the first main circuit or the second soft start circuit, the rectifier bridge BD1 is composed of four diodes, and AC alternating current is converted into direct current through chopper as a direct current system supplier; the positive pole 2 pin of the direct current output terminal of the rectifier bridge BD1 provides energy for the seventh energy storage capacitor C7 and the eighth energy storage capacitor C8 through the second inductor L2 and the twelfth diode D10; the direct current is boosted under the driving of the tenth MOS triode Q10 in the PFC power factor correction chip U4, and the ninth diode D9 is used for freewheeling; the seventh energy storage capacitor C7 and the eighth energy storage capacitor C8 are controlled by the switching state of the tenth MOS triode Q10; the PFC power factor correction chip U4 feeds back the BUS voltage closed loop control switching of the ninth MOS triode Q9 in the second soft start circuit in the AC-DC conversion module through the voltage feedback signal input terminal 6 pin, and the output voltage BUS of the seventh energy storage capacitor C7 and the eighth energy storage capacitor C8 in the energy storage circuit is more stable; the voltage output by the BOOST boost circuit and the voltage of the seventh energy storage capacitor C7 and the eighth energy storage capacitor C8 in the energy storage circuit are cycled through the three parallel capacitors C9, C29 and C30 and the three series seventy-sixth load resistors R76, seventy-seventh load resistors R77 and seventy-eighth load resistors R78 in the BUCK step-down circuit, and the positive pole voltage BUS of the seventh energy storage capacitor C7 and the eighth energy storage capacitor C8 in the energy storage circuit is further stabilized;

[0068] The direct current- alternating current conversion driving module includes first, second, third and fourth driving circuits and an arc stove voltage detection circuit, the four driving circuits are the same in structure and each include a MOS triode, the MOS triodes included in the first, second, third and fourth driving circuits are first MOS triode Q1, second MOS triode Q2, third MOS triode Q5 and fourth MOS triode Q6 respectively; the arc stove voltage detection circuit includes a voltage detection chip U2;

[0069] The sources of the first and second MOS triodes are respectively connected to the positive poles of the energy storage circuits in the inverter boost module, that is, voltage output terminals, for receiving direct current voltage BUS, the drain of the first MOS triode Q1 is connected to the source of the third MOS triode Q5, and the drain of the second MOS triode Q2 is connected to the source of the fourth MOS triode Q6; the drains of the third MOS triode Q5 and the fourth MOS triode Q6 are both connected to the voltage detection signal input terminal of the voltage detection chip U2; the voltage detection signal output terminal of the voltage detection chip U2 is connected to the arc stove copper coil voltage detection signal input terminal of the microcontroller module;

[0070] The first driving circuit further comprises a first resistor R1, a first guide diode D1, a third resistor R3, a fifth resistor R5, a second isolation diode DR2, a first capacitor C1, a sixteenth diode D16, one end of the third resistor R3 is connected to a first driving circuit control signal output pin DRV1H of the microcontroller module, the other end is connected to a gate of a first MOS triode Q1, the gate and the drain of the first MOS triode Q1 are connected to an isolation circuit composed of the fifth resistor R5 and the second isolation diode DR2 in parallel; the source and the drain of the first MOS triode Q1 are connected to an anti-reverse current control circuit composed of the first capacitor C1 and the sixteenth diode D16 in parallel; the anode of the sixteenth diode D16 is connected to the drain of the first MOS triode Q1, and the cathode of the sixteenth diode D16 is connected to the source of the first MOS triode Q1; a guide circuit composed of the first resistor R1 and the first guide diode D1 in series is connected to the third resistor R3 in parallel, and the anode of the first guide diode D1 is connected to the gate of the first MOS triode Q1;

[0071] The second driving circuit further comprises a second resistor R2, a second guide diode D2, a fourth resistor R4, a sixth resistor R6, a third isolation diode DR3, a second capacitor C2, a fifteenth diode D15, one end of the fourth resistor R4 is connected to a second driving circuit control signal output pin DRV2H of the microcontroller module, the other end is connected to a gate of a second MOS triode Q2, the gate and the drain of the second MOS triode Q2 are connected to an isolation circuit composed of the sixth resistor R6 and the third isolation diode DR3 in parallel; the source and the drain of the second MOS triode Q2 are connected to an anti-reverse current control circuit composed of the second capacitor C2 and the fifteenth diode D15 in parallel; the anode of the fifteenth diode D15 is connected to the drain of the second MOS triode Q2, and the cathode of the fifteenth diode D15 is connected to the source of the second MOS triode Q2; a guide circuit composed of the second resistor R2 and the second guide diode D2 in series is connected to the fourth resistor R4 in parallel, and the anode of the second guide diode D2 is connected to the gate of the second MOS triode Q2;

[0072] The third driving circuit further comprises an eighth resistor R8, a third guide diode D3, a tenth resistor R10, a twelfth resistor R12, a fourth isolation diode DR4, a third capacitor C3, an eighteenth diode D18, one end of the tenth resistor R10 is connected to a third driving circuit control signal output pin DRV1L of the microcontroller module, the other end is connected to a gate of a third MOS triode Q5, the gate and the drain of the third MOS triode Q5 are connected to an isolation circuit composed of the twelfth resistor R12 and the fourth isolation diode DR4 in parallel; the source and the drain of the third MOS triode Q5 are connected to an anti-reverse current control circuit composed of the third capacitor C3 and the eighteenth diode D18 in parallel; the positive electrode of the eighteenth diode D18 is connected to the drain of the third MOS triode Q5, and the negative electrode of the eighteenth diode D18 is connected to the source of the third MOS triode Q5; a guide circuit composed of the eighth resistor R8 and the third guide diode D3 in series is connected to the tenth resistor R10 in parallel, and the positive electrode of the third guide diode D3 is connected to the gate of the third MOS triode Q5; the drain of the third MOS triode Q5 is connected to a voltage input end of the voltage detection chip U2, and a voltage detection signal output end of the voltage detection chip U2 is connected to an arc copper coil voltage detection signal input end of the microcontroller module;

[0073] The fourth driving circuit further comprises a ninth resistor R9, a fourth guide diode D4, an eleventh resistor R11, a thirteenth resistor R13, a fifth isolation diode DR5, a fourth capacitor C4, a seventeenth diode D17, one end of the eleventh resistor R11 is connected to a fourth driving circuit control signal output pin DRV2L of the microcontroller module, the other end is connected to a gate of a fourth MOS triode Q6, the gate and the drain of the fourth MOS triode Q6 are connected to an isolation circuit composed of the thirteenth resistor R13 and the fifth isolation diode DR5 in parallel; the source and the drain of the fourth MOS triode Q6 are connected to an anti-reverse current control circuit composed of the fourth capacitor C4 and the seventeenth diode D17 in parallel, the positive electrode of the seventeenth diode D17 is connected to the drain of the fourth MOS triode Q6, and the negative electrode of the seventeenth diode D17 is connected to the source of the fourth MOS triode Q6; a guide circuit composed of the ninth resistor R9 and the fourth guide diode D4 in series is connected to the eleventh resistor R11 in parallel, and the positive electrode of the fourth guide diode D4 is connected to the gate of the fourth MOS triode Q6; the drain of the fourth MOS triode Q6 is connected to a voltage input end of the voltage detection chip U2, and a voltage detection signal output end of the voltage detection chip U2 is connected to an arc copper coil voltage detection signal input end of the microcontroller module;

[0074] The intermediate junction between the drain of the first MOS triode Q1 and the source of the third MOS triode Q5 is connected to the first end connecting pin of the arc copper coil through the twenty-second capacitor C22, the first inductance L1 is connected between the first end connecting pin and the second end connecting pin of the arc copper coil, and the second end connecting pin of the arc copper coil is connected to the intermediate junction between the drain of the second MOS triode Q2 and the source of the fourth MOS triode Q6;

[0075] The direct-current-to-alternating-current conversion driving module includes first, second, third and fourth driving circuits, an arc voltage detection circuit, and four driving circuits which are the same in structure and each include a MOS triode, the MOS triodes included in the first, second, third and fourth driving circuits are first MOS triode Q1, second MOS triode Q2, third MOS triode Q3 and fourth MOS triode Q4 respectively, the arc voltage detection circuit includes a voltage detection chip U9, a second current transformer CT2, a full-bridge rectifier bridge, an RC filter circuit and a voltage dividing circuit, and the high-voltage package module includes a high-voltage package CT3.

[0076] The sources of the first and second MOS triodes are respectively connected to the positive pole of the energy storage circuit in the inverter boost module, i.e. a voltage output end, for receiving a direct-current voltage BUS, the drain of the first MOS triode Q1 is connected to the source of the third MOS triode Q5, and the drain of the second MOS triode Q2 is connected to the source of the fourth MOS triode Q6.

[0077] The first driving circuit further includes a first isolation circuit composed of an eighty-first resistor R80 and a first capacitor C1 in series, and the first isolation circuit is connected in parallel between the source and the drain of the first MOS triode Q1.

[0078] The second driving circuit further includes a second isolation circuit composed of an eighty-second resistor R81 and a second capacitor C2 in series, and the second isolation circuit is connected in parallel between the source and the drain of the second MOS triode Q2.

[0079] The third driving circuit further includes a third isolation circuit composed of an eighty-third resistor R82 and a third capacitor C3 in series, and the third isolation circuit is connected in parallel between the source and the drain of the third MOS triode Q5.

[0080] The fourth driving circuit further includes a fourth isolation circuit composed of an eighty-fourth resistor R83 and a fourth capacitor C4 in series, and the fourth isolation circuit is connected in parallel between the source and the drain of the fourth MOS triode Q6.

[0081] The first pin 1 of the primary side winding of the second current transformer CT2 is connected to the middle joint of the drain of the first MOS triode Q1 and the source of the third MOS triode Q5, and the second pin 2 of the primary side winding of the second current transformer CT2 is connected to the first pin HPA of the arc copper coil, forming a series connection relationship, for detecting the current through the arc copper coil;

[0082] The two pins of the secondary side winding of the second current transformer CT2 are connected to the rectification signal input end of the full-bridge rectifier bridge, and the full-bridge rectifier bridge includes the nineteenth diode D19, the twenty-second diode D20, the twenty-first diode D21, and the twentieth diode D22; the first pin 3 of the secondary side winding of the second current transformer CT2 is connected to the anode of the twenty-first diode D21; the anode of the twentieth diode D22 is grounded, and the cathode is connected to the first pin 3; the second pin 4 of the secondary side winding of the second current transformer CT2 is connected to the anode of the nineteenth diode D19; the anode of the twenty-second diode D20 is grounded, and the cathode is connected to the second pin 4;

[0083] The cathode of the nineteenth diode D19 and the cathode of the twenty-first diode D21 are connected;

[0084] The RC filter circuit includes a resistance series circuit composed of the sixty-third resistor R63, the twentieth resistor R20, and the sixty-fourth resistor R64, and the twenty-first capacitor C21, which is connected in parallel with the resistance series circuit; the resistance series circuit and the twenty-first capacitor C21 are connected in parallel with the two pins of the rectification signal output end of the full-bridge rectifier bridge, that is, one end of the resistance series circuit and the anode of the twenty-first capacitor C21 are both connected to the common joint of the cathode of the nineteenth diode D19 and the cathode of the twenty-first diode D21, and the cathodes of the resistance series circuit and the twenty-first capacitor C21 are grounded;

[0085] The voltage dividing circuit includes the ninety-ninth resistor R99 and the twenty-third capacitor C23, which are connected in series, and the free end of the twenty-third capacitor C23 is grounded;

[0086] The positive voltage signal output by the anode of the twenty-first capacitor C21 of the RC filter circuit is transmitted to the voltage detection signal input end 1 pin IN- of the voltage detection chip U9 through the ninety-ninth resistor R99 in the voltage dividing circuit; the voltage detection chip U9 is a comparator chip, the voltage detection signal input end 1 pin IN- of the voltage detection chip U9 is the negative end of the comparator, and the 3 pin IN+ of the voltage detection chip U9 is the positive end of the comparator, which is connected to the comparison voltage reference signal output end CT_RV of the microprocessor; the voltage detection signal output end of the voltage detection chip is connected to the arc copper coil voltage detection signal input end OCP of the microcontroller module.

[0087] The direct-current-alternating-current conversion driving module converts direct current into alternating current and sends it to the copper coil of the arc stove, the high-voltage package CT3 is used to process the alternating current into high voltage, and the direct-current-alternating-current conversion driving module and the high-voltage package module act on the copper coil of the arc stove at the same time, the copper coil of the arc stove generates high-temperature arc to form a visible fire for heating work;

[0088] In the arc stove voltage detection circuit, the primary side winding of the second current transformer CT2 passes through high-voltage current, and the secondary side of the second current transformer CT2 is converted into low-voltage current and sent to the rectification signal input end of the full-bridge rectifier bridge. The full-bridge rectifier bridge is rectified into direct current and sent to the RC filter circuit. The current is formed on the resistor string circuit composed of the sixty-third resistor R63, the twentieth resistor R20 and the sixty-fourth resistor R64, and is converted into a positive voltage on the twenty-first capacitor C21. The positive voltage is sent to the voltage detection signal input end 1 foot IN- of the voltage detection chip U9 through the ninety-ninth resistor R99 in the voltage dividing circuit. The voltage detection chip U9 compares the comparison voltage reference value signal CT_RV input by the 1 foot IN- and the 3 foot IN+, and sends the comparison result to the arc stove copper coil voltage detection signal input end OCP of the microcontroller module through the voltage detection signal output end 4 foot of the voltage detection chip U9. The microcontroller module performs subsequent control;

[0089] In the first half of a period, the microcontroller module controls the first driving circuit control signal output pin DRV1H and the fourth driving circuit control signal output pin DRV2L to output high-level signals at the same time, and the first MOS triode Q1 and the fourth MOS triode Q6 are turned on. The direct current voltage BUS output by the inverter boost module is transmitted to the first end connection pin of the arc stove copper coil through the source, drain and twenty-second capacitor C22 of the first MOS triode of the first driving circuit. When passing through the arc stove copper coil, the arc stove copper coil generates high-temperature arc, and then the arc stove copper coil transmits the high-temperature arc to the source of the fourth MOS triode Q6 through the second end connection pin of the arc stove copper coil. Finally, the high-temperature arc is sent to the voltage detection signal input end P+ pin of the voltage detection chip U2 through the drain of the fourth MOS triode Q6. The voltage detection signal output end 7 pin of the voltage detection chip U2 transmits the voltage detection signal to the arc stove copper coil voltage detection signal input end of the microcontroller module.

[0090] In the latter half of a cycle, the microcontroller module controls its third drive circuit control signal output pin DRV1L and second drive circuit control signal output pin DRV2H to output high level signals simultaneously, the third MOS triode Q3 and the second MOS triode Q2 are turned on, the direct current voltage BUS output by the inverter boosting module is transmitted to the second end connecting pin of the arc copper coil through the source and drain of the second MOS triode Q2 of the second drive circuit, when passing through the arc copper coil, the arc copper coil generates high temperature arc, and then the high temperature arc is transmitted to the source of the third MOS triode Q3 through the first end connecting pin of the arc copper coil and the twenty-second capacitor C22, and finally transmitted to the voltage detection signal input end P+ pin of the voltage detection chip U2 through the drain of the third MOS triode Q3; the voltage detection signal output end 7 pin of the voltage detection chip U2 transmits the voltage detection signal to the arc copper coil voltage detection signal input end of the microcontroller module;

[0091] The microcontroller module implements the commutation driving control of the arc copper coil in the mode of switching at the same time of the former half cycle and the latter half cycle: the first MOS triode Q1 and the fourth MOS triode Q6 are turned on in the former half cycle, the second MOS triode Q2 and the third MOS triode Q5 are turned on in the latter half cycle, then the next cycle is performed, and the cycle is continued, so that the direct current signal is converted into an alternating current signal, and the arc copper coil is driven to generate arc heat.

[0092] The technical scheme is an arc copper coil main board designed for providing voltage output for an arc copper coil; the product generates 1200 degrees of high temperature in the working process, has the advantages of fast temperature rise and safe use of a lamp, solves the history that a clear fire must rely on gas, and provides electricity for the arc copper coil to generate arc by using the arc to generate a clear fire, and solves the history of relying on wood to ignite and burn natural gas to generate a clear fire.

[0093] The above merely describes specific implementation manners of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application; therefore, the protection scope of the present application should be the protection scope of the claims.

Claims

1. A power control board for an electric arc range, characterized in that, The application relates to a microcontroller module, a filter and stabilizer module, an AC-DC conversion module, an inverter and voltage boosting module, a DC-AC conversion driving module and a high-voltage package module. The input end of the filter and stabilizer module is connected with two-phase power supply of a commercial power grid, the output end of the filter and stabilizer module is connected with the input end of the AC-DC conversion module, the output end of the AC-DC conversion module is connected with the input end of the inverter and voltage boosting module, the output end of the inverter and voltage boosting module is connected with the input end of the DC-AC conversion driving module, the output end of the DC-AC conversion driving module is connected with a copper coil electric arc range for heating, the AC-DC conversion control signal output end of the microcontroller module is connected with the control signal input end of the AC-DC conversion module, and the DC-AC conversion signal output end of the microcontroller module is connected with the control signal input end of the DC-AC conversion driving module; the two pins of the AC power output end of the DC-AC conversion driving module are used for being connected with two ends of the copper coil of the electric arc range; the high-voltage package module is used for being connected with the two ends of the copper coil of the electric arc range and simultaneously being connected between the two pins of the AC power output end of the DC-AC conversion driving module. The filter and stabilizer module filters and stabilizes the input commercial power supply and sends the power supply to the power input end of the AC-DC conversion module, the AC-DC conversion module receives the AC-DC conversion control signal of the microcontroller module, the AC-DC conversion module converts the input AC power into DC power and sends the DC power to the power input end of the inverter and voltage boosting module, the inverter and voltage boosting module boosts the received DC power and sends the power to the power input end of the DC-AC conversion driving module, the control signal input end of the DC-AC conversion driving module receives the DC-AC conversion signal of the microcontroller module, the DC-AC conversion driving module converts the DC power into AC power and sends the AC power to the copper coil of the electric arc range, the high-voltage package module is used for processing the AC power into high-voltage, and the DC-AC conversion driving module and the high-voltage package module simultaneously act on the copper coil of the electric arc range, the copper coil of the electric arc range emits high-temperature arc, forms a naked fire and is used for heating work.

2. The power control board for an electric range as set forth in claim 1, wherein, The filter and stabilizer module comprises a zero-sequence current transformer unit and an EMI filter unit. The zero-sequence current transformer unit comprises a zero-sequence current transformer, a ground wire detection circuit and a phase sequence matching signal transmission circuit. The firewire pin of the power access end of the zero sequence current transformer is connected with the firewire L of the power supply, the zero line pin of the power access end of the zero sequence current transformer is connected with the zero line N of the power supply, the firewire pin of the power output end of the zero sequence current transformer is connected with the first pin of the input end of the EMI filter, the zero line pin of the power output end of the zero sequence current transformer is connected with the second pin of the input end of the EMI filter, the first current transformer inside the zero sequence current transformer is connected between the firewire pin of the power output end of the zero sequence current transformer and the firewire pin of the power access end of the zero sequence current transformer, the second current transformer inside the zero sequence current transformer is connected between the zero line pin of the power output end of the zero sequence current transformer and the zero line pin of the power access end of the zero sequence current transformer, and the zero sequence current transformer further has a detection signal output end, the L-phase detection signal output pin of the detection signal output end corresponds to the power supply L phase, and the N-phase detection signal output pin of the detection signal output end corresponds to the power supply N phase; The phase sequence matching signal transmission circuit comprises a second rectifier bridge and a seventeenth resistor, the second rectifier bridge is composed of four diodes, the L-phase alternating current signal input pin of the second rectifier bridge is connected with the L-phase detection signal output pin of the zero sequence current transformer, the N-phase alternating current signal input pin of the second rectifier bridge is connected with the N-phase detection signal output pin of the zero sequence current transformer, the direct current signal positive output pin of the second rectifier bridge is connected with the first phase sequence signal input pin of the microcontroller after being connected with the seventeenth resistor in series, and the direct current signal negative output pin 1 of the second rectifier bridge is connected with the second phase sequence signal input pin of the microcontroller; The microcontroller module is used for comparing the first and second phase sequence signals of the first and second phase sequence signal input pins of the microcontroller, judging whether the phase sequence is accurate or not, and outputting corresponding information; The ground wire detection circuit comprises twenty-first and twenty-second voltage dividing resistors, a first optoelectronic coupler, a twenty-third voltage dividing resistor, a ground wire detection chip, a twenty-fifth voltage dividing resistor, a twenty-sixth voltage dividing resistor, a second optoelectronic coupler and a twenty-seventh voltage dividing resistor; one end of a series circuit composed of the twenty-first and twenty-second voltage dividing resistors is connected with the firewire L of the power supply, the other end is connected with the positive pole of the light-emitting diode side of the first optoelectronic coupler, the negative pole of the light-emitting diode side of the first optoelectronic coupler is grounded, the input pin of the light-sensitive element side of the first optoelectronic coupler is connected with a 3.3V direct current power supply through the twenty-third voltage dividing resistor, the input pin of the light-sensitive element side of the first optoelectronic coupler is connected with the ground wire detection input pin of the ground wire detection chip through the middle junction point of the twenty-third voltage dividing resistor, and the output pin of the light-sensitive element side of the first optoelectronic coupler is grounded. One end of a series circuit composed of a twenty-fifth voltage dividing resistor and a twenty-sixth voltage dividing resistor in series connection is connected to a zero line N pin of a commercial power supply, and the other end is connected to a positive electrode of a light emitting diode side of a second optocoupler, a negative electrode of the light emitting diode side of the second optocoupler is grounded, and an input pin of a photosensitive element side of the second optocoupler is connected to a 3.3V DC power supply through a twenty-seventh voltage dividing resistor, the input pin of the photosensitive element side of the second optocoupler is connected to a zero line detection input pin of a ground line detection chip through a middle connection point of the twenty-seventh voltage dividing resistor, and an output pin of a photosensitive element side of a first optocoupler is grounded; A ground line detection signal output pin of the ground line detection chip is connected to a ground line detection signal input pin of a microcontroller module; A light emitting diode side of a first optocoupler is connected between a live line L of a commercial power supply and a ground terminal GD, the light emitting diode of the first optocoupler is powered, a live line detection input pin of the ground line detection chip obtains a voltage, similarly, a light emitting diode side of a second optocoupler is connected between a zero line N of the commercial power supply and the ground terminal GD, the light emitting diode of the second optocoupler is powered, a zero line detection input pin of the ground line detection chip obtains a voltage, the ground line detection chip performs an and gate logic on the levels of the live line detection input pin and the zero line detection input pin, and the ground line detection chip sends a ground line detection signal to the ground line detection signal input pin of the microcontroller module through the ground line detection signal output pin; when the ground line detection signal output pin of the ground line detection chip is a high level, it indicates that the ground line is normally connected, and when it is a low level, it indicates that the ground line is not normally connected; The live line L and the zero line N of the commercial power supply are correctly connected to input pins of a live line and a zero line of the zero sequence current transformer, when there is a working current, L-phase detection signal output pins and N-phase detection signal output pins of the zero sequence current transformer proportionally output the inducted current of the same phase, after being detected by a second rectifier bridge, the current is sent to first phase sequence signal input pins and second phase sequence signal input pins of the microcontroller module, the microcontroller module obtains a voltage variation zero-crossing period therefrom, and performs phase sequence matching with a ground line detection signal received by the ground line detection signal input pin, to determine whether the sequence of the live line / zero line / ground line is correct, and to calculate the size of the input current through the amplitude; A first capacitor is connected between a live line pin of a commercial output terminal of the zero sequence current transformer and a ground terminal GND, and a second capacitor is connected between a zero line pin of the commercial output terminal of the zero sequence current transformer and the ground terminal GND, the first capacitor and the second capacitor are used to form a reactive power compensation circuit; a first voltage-dependent resistor is further connected in parallel across the first capacitor, and a second voltage-dependent resistor is further connected in parallel across the second capacitor, the first voltage-dependent resistor and the second voltage-dependent resistor are used to absorb the impulse voltage in the connected commercial power grid. The EMI filter unit comprises a second filter capacitor, a current stabilizing circuit, and a third filter inductor. The current stabilizing circuit comprises a twenty-ninth resistor, a thirty-first resistor, and a thirty-fourth resistor. The twenty-ninth resistor, the thirty-first resistor, and the thirty-fourth resistor are connected in series to form a series circuit. The second filter capacitor and the current stabilizing circuit are connected in parallel between a live pin and a neutral pin of a power output terminal of the zero sequence current transformer. The current stabilizing circuit is connected to two input pins of the third filter inductor. Two output pins of the third filter inductor are connected to two power input pins of an AC-DC conversion module. The third filter inductor is used for filtering white noise of a connected power grid. The second filter capacitor is used for eliminating interference caused by the power grid. The AC-DC conversion module comprises a control unit and an AC-DC conversion unit. The control unit comprises a first main circuit and a second slow start circuit. The AC-DC conversion unit comprises a first rectifier bridge formed by four diodes. The second slow start circuit comprises a second relay, a load resistor matrix, a ninth MOS transistor, an eleventh diode, and a thirtieth load resistor. One end of a normally open contact of the second relay is connected to a live L output pin of the third filter inductor, and the other end is connected to an input terminal of the load resistor matrix. An output terminal of the load resistor matrix is used for connecting an AC power input terminal L phase connection pin of the first rectifier bridge of the AC-DC conversion unit. An AC power input terminal N phase connection pin of the first rectifier bridge is connected to a neutral N output pin of the third filter inductor. One end of a coil of the second relay is connected to a +12V DC power supply, and the other end is connected to a source of the ninth MOS transistor. An eleventh diode is further connected between the source of the ninth MOS transistor and the +12V DC power supply. A positive electrode of the eleventh diode is connected to the source of the ninth MOS transistor, and a negative electrode of the eleventh diode is connected to the +12V DC power supply. A gate of the ninth MOS transistor is connected to a slow start drive signal output pin of a microcontroller module. The gate and the drain of the ninth MOS transistor are connected in series to the thirtieth load resistor. The drain of the ninth MOS transistor is grounded. When the slow start drive signal output pin of the microcontroller module outputs a high level signal, the ninth MOS transistor is turned on, and the second slow start circuit is enabled. The second slow start circuit controls slow start due to the action of the load resistor matrix. The first main circuit comprises a first relay, an eighth MOS transistor, a seventh diode, and a twenty-fourth load resistor. One end of the normally open contact of the first relay is connected to the live wire L output pin of the third filter inductor, and the other end is also connected to the AC input end L phase connection pin of the first rectifier bridge in the AC-DC conversion unit. One end of the coil of the second relay is connected to the +12V DC power supply, and the other end is connected to the source of the eighth MOS transistor. The source of the eighth MOS transistor and the +12V DC power supply are further connected to the seventh diode. The anode of the seventh diode is connected to the source of the eighth MOS transistor, and the cathode of the seventh diode is connected to the +12V DC power supply. The gate of the eighth MOS transistor is connected to the main circuit drive signal output pin of the microcontroller module. The twenty-fourth load resistor is connected in series between the gate and the drain of the eighth MOS transistor. The drain of the eighth MOS transistor is grounded. When the main circuit drive signal output pin of the microcontroller module outputs a high-level signal, the eighth MOS transistor is turned on, and the overcurrent on the first main circuit is enabled. The main circuit drive signal output pin and the soft start drive signal output pin of the microcontroller module do not output high-level signals at the same time. The inverter boost module comprises a PFC power factor correction unit, a BOOST boost circuit, an energy storage circuit, and a BUCK step-down circuit. The energy storage circuit comprises a seventh energy storage capacitor and an eighth energy storage capacitor connected in parallel. The PFC power factor correction unit comprises a PFC power factor correction chip. The BOOST boost circuit comprises a ninth diode, a tenth capacitor, a second inductor, a tenth MOS transistor, a twelfth diode, a twenty-eighth capacitor, a twenty-seventh capacitor, a first isolation diode, and a thirty-second resistor. The positive and negative poles of the tenth capacitor are connected in parallel between the DC output end positive pole pin and the DC output end negative pole pin of the first rectifier bridge. The input end of the second inductor is connected to the DC output end positive pole pin of the first rectifier bridge. The input end of the second inductor is also connected to the PFC power factor correction voltage VBIN output pin of the PFC power factor correction chip. The output end of the second inductor is connected to the source of the tenth MOS transistor. The gate of the tenth MOS transistor is connected to the boost control signal PFC_DRV output pin of the PFC power factor correction chip. The gate and the drain of the tenth MOS transistor are connected to a parallel circuit composed of the first isolation diode and the thirty-second resistor. The drain of the tenth MOS transistor is grounded. The twenty-seventh capacitor is connected in parallel between the source and the drain of the tenth MOS transistor. The output end of the second inductor is also connected to the anode of the twelfth diode. The cathode of the twelfth diode is connected to the parallel anode of the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit. The twenty-eighth capacitor is connected in parallel with the twelfth diode. The anode of the ninth diode is connected to the PFC power factor correction voltage VBIN output pin of the PFC power factor correction chip. The cathode of the ninth diode is connected to the cathode of the twelfth diode. The positive pole of the energy storage circuit is connected to the voltage input end of the DC-AC conversion drive module. The positive pole of the energy storage circuit outputs the voltage BUS. The positive pole of the energy storage circuit is also connected to the boost feedback signal BUS input pin of the PFC power factor correction chip. The BUCK voltage reduction circuit comprises a parallel circuit composed of the ninth capacitor, the twenty-ninth capacitor and the thirtieth capacitor, and a series circuit composed of the seventy-sixth load resistor, the seventy-seventh load resistor and the seventy-eighth load resistor, the series circuit composed of the seventy-sixth load resistor, the seventy-seventh load resistor and the seventy-eighth load resistor is connected in parallel with the ninth capacitor, the twenty-ninth capacitor and the thirtieth capacitor; the parallel circuit composed of the ninth capacitor, the twenty-ninth capacitor and the thirtieth capacitor is also connected in parallel with the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit; The output energy of the two output terminal pins of the third filter inductor is sent into the two AC signal input pins of the first rectifier bridge through the first main circuit or the second slow start circuit, the first rectifier bridge is composed of four diodes, and AC power is converted into DC power through chopper as a DC system supplier; the positive pole of the DC output terminal of the first rectifier bridge provides energy for the seventh energy storage capacitor and the eighth energy storage capacitor through the second inductor and the twelfth diode; the tenth MOS triode boosts the DC power under the driving of the PFC power factor correction chip, and the ninth diode is used for freewheeling; the seventh energy storage capacitor and the eighth energy storage capacitor are controlled by the switching state of the tenth MOS triode; the PFC power factor correction chip feeds back the BUS voltage of the ninth MOS triode in the second slow start circuit in the AC-DC conversion module through the voltage feedback signal BUS input pin, so that the output voltage BUS of the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit is more stable; the voltage output by the BOOST voltage boosting circuit and the voltage of the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit are recycled through the ninth capacitor, the twenty-ninth capacitor, the thirtieth capacitor, the seventy-sixth load resistor, the seventy-seventh load resistor and the seventy-eighth load resistor in the BUCK voltage reduction circuit, and the positive pole voltage BUS of the seventh energy storage capacitor and the eighth energy storage capacitor in the energy storage circuit is further stabilized; The DC-AC conversion driving module comprises first, second, third and fourth driving circuits and an arc stove voltage detection circuit, the four driving circuits are the same in structure and each comprises a MOS triode, the MOS triodes included in the first, second, third and fourth driving circuits are first, second, third and fourth MOS triodes respectively; the arc stove voltage detection circuit comprises a voltage detection chip, a second current transformer, a full-bridge rectifier, an RC filter circuit and a voltage dividing circuit; The sources of the first and second MOS triodes are connected to the positive pole of the energy storage circuit in the inverter voltage boosting module, i.e. the voltage output terminal, for receiving the DC voltage BUS, the drain of the first MOS triode is connected to the source of the third MOS triode, and the drain of the second MOS triode is connected to the source of the fourth MOS triode; The first driving circuit further comprises a first isolation circuit composed of an eightieth resistor and a first capacitor connected in series, and the first isolation circuit is connected in parallel between the source and the drain of the first MOS triode; The second driving circuit further comprises a second isolation circuit composed of an eighty-first resistor and a second capacitor in series, which is connected in parallel between the source and the drain of the second MOS triode; The third driving circuit further comprises a third isolation circuit composed of an eighty-second resistor and a third capacitor in series, which is connected in parallel between the source and the drain of the third MOS triode; The fourth driving circuit further comprises a fourth isolation circuit composed of an eighty-third resistor and a fourth capacitor in series, which is connected in parallel between the source and the drain of the fourth MOS triode; In the arc stove voltage detection circuit, the first pin of the primary side winding of the second current transformer is connected to the intermediate junction between the drain of the first MOS triode and the source of the third MOS triode, and the second pin of the primary side winding of the second current transformer is connected to the first pin of the arc stove copper coil, forming a series connection for detecting the current passing through the arc stove copper coil; The two pins of the secondary side winding of the second current transformer are connected to the rectified signal input end of the full-bridge rectifier; the RC filter circuit comprises a resistor series circuit composed of a sixty-third resistor, a twentieth resistor and a sixty-fourth resistor in series, and a twenty-first capacitor, which is connected in parallel with the resistor series circuit, and the resistor series circuit and the twenty-first capacitor are connected in parallel with the two pins of the rectified signal output end of the full-bridge rectifier; the positive signal output end of the RC filter circuit is connected to the voltage detection signal input end of the voltage detection chip through a voltage dividing circuit; the voltage detection signal output end of the voltage detection chip is connected to the arc stove copper coil voltage detection signal input end of the microcontroller module; The DC-AC conversion driving module converts DC into AC and sends it to the copper coil of the arc stove, and the high-voltage package module is used to process the AC into high voltage, and the DC-AC conversion driving module and the high-voltage package module act on the copper coil of the arc stove at the same time, the copper coil of the arc stove emits high-temperature arc to form a visible flame for heating work; In the arc stove voltage detection circuit, the primary side winding of the second current transformer passes through high-voltage current, and the secondary side of the second current transformer is converted into low-voltage current and sent to the rectified signal input end of the full-bridge rectifier, the full-bridge rectifier rectifies the DC current into DC current and sends it to the RC filter circuit, forms a current on the resistor series circuit composed of the sixty-third resistor, the twentieth resistor and the sixty-fourth resistor in series, and converts it into a positive voltage on the twenty-first capacitor, which is sent to the voltage detection signal input end of the voltage detection chip through the voltage dividing circuit; In the first half of a cycle, the microcontroller module controls its first drive circuit control signal output pin and fourth drive circuit control signal output pin to output high level signals at the same time, the first MOS triode and the fourth MOS triode are turned on, the direct current voltage BUS output by the inverter voltage boosting module is transmitted to the first end connecting pin of the arc copper coil through the source and drain of the first MOS triode of the first drive circuit and the primary side winding of the second current transformer, when passing through the arc copper coil, the arc copper coil generates high temperature arc under the joint action of the high voltage package module, then the arc copper coil is transmitted to the source of the fourth MOS triode through the second end connecting pin of the arc copper coil, and finally it is transmitted to the ground terminal through the drain of the fourth MOS triode; In the second half of a cycle, the microcontroller module controls its third drive circuit control signal output pin and second drive circuit control signal output pin to output high level signals at the same time, the third MOS triode and the second MOS triode are turned on, the direct current voltage BUS output by the inverter voltage boosting module is transmitted to the second end connecting pin of the arc copper coil through the source and drain of the second MOS triode of the second drive circuit, when passing through the arc copper coil, the arc copper coil generates high temperature arc under the joint action of the high voltage package module, then the arc copper coil is transmitted to the source of the third MOS triode through the first end connecting pin of the arc copper coil and the primary side winding of the second current transformer, and finally it is transmitted to the voltage detection signal input terminal P+ pin of the voltage detection chip through the drain of the third MOS triode; the voltage detection signal output terminal of the voltage detection chip transmits the voltage detection signal to the arc copper coil voltage detection signal input terminal of the microcontroller module; The microcontroller module implements commutating drive control of the arc copper coil in the mode of switching at the same time of the front half cycle and the rear half cycle: the first MOS triode and the fourth MOS triode are turned on in the front half cycle, the second MOS triode and the third MOS triode are turned on in the rear half cycle, then the next cycle is carried out, and the cycle is repeated, so that the direct current signal is converted into an alternating current signal to drive the arc copper coil to generate arc heating.

3. An electric arc range, characterized by: An arc copper coil power supply control board as claimed in claim 1 or claim 2. An arc copper coil power supply control board as claimed in claim 1 or claim 2.

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