CN221151597U - IGBT driving circuit of electromagnetic oven - Google Patents
IGBT driving circuit of electromagnetic oven Download PDFInfo
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- CN221151597U CN221151597U CN202323055554.5U CN202323055554U CN221151597U CN 221151597 U CN221151597 U CN 221151597U CN 202323055554 U CN202323055554 U CN 202323055554U CN 221151597 U CN221151597 U CN 221151597U
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Abstract
The induction cooker IGBT driving circuit is characterized in that the input end of the induction cooker IGBT driving circuit is connected with a diode D1 and a diode D2, the diode D1 is grounded through a diode D4, a resistor R25 and a capacitor EC1, the resistor R25 is also connected with a switching power supply U1, the output end of the switching power supply U1 is connected with the input end of a transformer winding T1 through a capacitor C19, a diode D6 is arranged between the output end of the transformer winding T1 and the capacitor C19, and 18V voltage is output from the output end of the transformer winding T1; the power supply device also comprises a main control unit IC1, wherein the VCC end of the main control unit IC1 receives 18V voltage, the LDO end of the main control unit IC1 outputs +5V, and the model of the main control unit IC1 is OB6654; the heating input end is connected with a terminal LIN1 and a terminal LOUT1 which are used for being connected with the coil panel, a capacitor C1 is arranged between the terminal LIN1 and the terminal LOUT1, the capacitor C1 is connected with the drain electrode of the IGBT tube, the source electrode of the capacitor C1 is grounded, the grid electrode of the IGBT tube is respectively connected with the diode ZD1 through a resistor R6, the grid electrode of the IGBT tube is also connected with the main control unit IC1 through a resistor R4, the resistor R4 is connected with 18V through a diode D3 and is grounded through a capacitor C20.
Description
Technical Field
The utility model relates to the field of induction cookers, in particular to an IGBT driving circuit of an induction cooker.
Background
The induction cooker breaks through the traditional open fire and bright cooking mode, adopts a magnetic field induction eddy current heating principle, continuously activates and stops IGBT grid voltage to enable current to pass through a coil to generate a magnetic field, magnetic force lines repeatedly cut and change at the bottom of the cooker to enable the bottom of the cooker to generate annular current (eddy current), countless small eddy current is utilized to oscillate iron molecules at a high speed, so that the utensil self-heats at a high speed, and then the utensil heats the things contained in the utensil through a heat transfer principle.
Therefore, the input alternating voltage must be converted into an alternating magnetic field through complex electronic circuit control, the IGBT plays a vital role, and the control logic of the IGBT directly influences the reliability and the service life of the induction cooker.
The traditional IGBT driving circuit generally adopts discrete components and consists of a plurality of triodes and other peripheral resistor and capacitor components, and the whole circuit has a plurality of component elements and complex circuits, so that the production and processing cost is increased.
Disclosure of utility model
In order to solve the problems, the technical scheme provides an induction cooker IGBT driving circuit.
In order to achieve the above purpose, the technical scheme is as follows:
The induction cooker IGBT driving circuit comprises an input end, wherein the input end is connected with a diode D1 and a diode D2, the diode D1 is grounded through a diode D4, a resistor R25 and a capacitor EC1 in sequence, the resistor R25 is also connected with a switching power supply U1, the output end of the switching power supply U1 is connected with the input end of a transformer winding T1 through a capacitor C19, a diode D6 is arranged between the output end of the transformer winding T1 and the capacitor C19, and the output end of the transformer winding T1 outputs 18V voltage;
The power supply system further comprises a main control unit IC1, wherein the VCC end of the main control unit IC1 receives 18V voltage, the LDO end of the main control unit IC1 outputs +5V, and the model of the main control unit IC1 is OB6654;
Still include the heating input, the heating input is connected with terminal LIN1 and the terminal LOUT1 that are used for being connected with the coil panel, be equipped with electric capacity C1 between terminal LIN1 and the terminal LOUT1, electric capacity C1 is connected with IGBT tube drain electrode, and its source ground, IGBT tube grid is connected through resistance R6 and diode ZD1 respectively, its grid still through resistance R4 with main control unit IC1 is connected, resistance R4 is connected with 18V voltage through diode D3, still is grounded through electric capacity C20.
In some embodiments, one end of the capacitor C1 is grounded through a resistor R3, a resistor R8, a resistor R10, a resistor R12, a resistor R14, a resistor R17 and a resistor R19 in sequence, and a common connection end of the resistor R17 and the resistor R19 is connected with the master control unit IC 1;
The other end of the capacitor C1 is grounded through a resistor R1, a resistor R5, a resistor R11, a resistor R13, a resistor R15, a resistor R18 and a resistor R20 in sequence, and the common connection end of the resistor R18 and the resistor R20 is connected with the main control unit IC 1.
In some embodiments, the device further comprises a thermistor T for detecting the IGBT tube, one end of the thermistor is connected with the +5V through a resistor R34, the other end of the thermistor is also connected with the main control unit IC1, and the other end of the thermistor is grounded.
In some embodiments, the furnace face probe further comprises a terminal TOP1 for connecting with the furnace face probe, one end of the terminal TOP1 is connected with the +5v through a resistor R35, and the other end is also connected with the main control unit IC1, and the other end is grounded.
In some embodiments, the output end of the transformer winding T1 is grounded through a capacitor EC3 and is also grounded through a resistor R38, the output end of the transformer winding T1 is connected to a diode D7, the output end of the diode D7 is grounded through a capacitor C14 and a capacitor EC4, respectively, and the 18V voltage outputs the signal VIN through a resistor R39.
In some embodiments, the input terminal is grounded through a resistor R21, a resistor R23, a resistor R29, and a resistor R32 in sequence, the resistor R29 is also grounded through a capacitor C12, and a VAD signal is sent to the master control unit IC 1;
The input end is further connected with the main control unit IC1 through a resistor R22, a resistor R24 and a resistor R30 in sequence, the resistor R30 is further connected with +5V through a diode D5 and used for voltage detection, and the resistor R30 is further grounded through a resistor R33.
The application has the beneficial effects that:
compared with the traditional 5V power supply circuit, the integrated LDO module circuit reduces the discrete component combination circuits such as LM7805 voltage stabilizing IC, diode, resistor, capacitor and the like, saves the space on a circuit board, reduces the production cost and improves the reliability of the circuit.
Compared with the traditional driving circuit, the integrated driving circuit reduces 3-4 triodes, and the peripheral resistor, the capacitor and other combined discrete elements thereof, saves the space on a circuit board, reduces the production cost and improves the reliability of the driving circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.
FIG. 1 is a block diagram of an embodiment of the present utility model;
fig. 2 is a schematic circuit structure of an embodiment of the present utility model.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1-2, an IGBT driving circuit of an induction cooker includes an input end, the input end is connected with a diode D1 and a diode D2, the diode D1 is grounded through a diode D4, a resistor R25 and a capacitor EC1 in sequence, the resistor R25 is also connected with a switching power supply U1, an output end of the switching power supply U1 is connected with an input end of a transformer winding T1 through a capacitor C19, a diode D6 is arranged between an output end of the transformer winding T1 and the capacitor C19, and an output end of the transformer winding T1 outputs 18V voltage;
The power supply circuit further comprises a main control unit IC1, wherein the VCC end of the main control unit IC1 receives 18V voltage, the LDO end of the main control unit IC1 outputs +5V, and the model of the main control unit IC1 is OB6654.
In this embodiment, the output end of the transformer winding T1 is grounded through a capacitor EC3 and is also grounded through a resistor R38, the output end of the transformer winding T1 is connected with a diode D7, the output end of the diode D7 is grounded through a capacitor C14 and a capacitor EC4, and the 18V voltage outputs a signal VIN through a resistor R39.
In this embodiment, the input end is grounded through a resistor R21, a resistor R23, a resistor R29 and a resistor R32 in sequence, and the resistor R29 is grounded through a capacitor C12 and sends a VAD signal to the main control unit IC 1;
The input end is further connected with the main control unit IC1 through a resistor R22, a resistor R24 and a resistor R30 in sequence, the resistor R30 is further connected with +5V through a diode D5 and used for voltage detection, and the resistor R30 is further grounded through a resistor R33.
The utility model converts the input 220V alternating voltage into 18V through the switching power supply circuit, and then directly connects to the MCU, and the LDO module integrated in the MCU directly outputs 5V for supplying power to the MCU and other peripheral circuits.
Referring to fig. 2, the circuit adopts an OB6654 singlechip, the VCC input end of the circuit is directly connected with the 18V output of a switching power supply, and an LDO module integrated in the singlechip directly outputs 5V voltage for supplying power to a sensor detection circuit, a buzzer output circuit, a signal detection circuit and the like.
The circuit of the utility model works as follows: the input 220V alternating voltage is connected to a switching power supply IC after passing through components such as D1, D2, D4, R25 and EC1, 18V voltage is coupled through D6, C19 and a transformer winding, the 18V voltage is directly connected to a VCC end of a singlechip, and 5V voltage is output through conversion of an LDO module in the singlechip.
According to the utility model, the singlechip with the model OB6654 is utilized, and the integrated LDO conversion module of the singlechip is directly introduced into the singlechip to output 5V voltage, so that compared with a traditional power supply voltage stabilizing circuit, the integrated LDO conversion circuit has the advantages that the discrete element combination circuits such as an LM7805 voltage stabilizing IC, a diode, a resistor, a capacitor and the like are reduced, the space on a circuit board is saved, the production cost is reduced, and the reliability of a driving circuit is improved.
The application further comprises a heating input end, wherein the heating input end is connected with a terminal LIN1 and a terminal LOUT1 which are used for being connected with a coil panel, a capacitor C1 is arranged between the terminal LIN1 and the terminal LOUT1, the capacitor C1 is connected with the drain electrode of an IGBT tube, the source electrode of the capacitor C1 is grounded, the grid electrode of the IGBT tube is respectively connected with a diode ZD1 through a resistor R6, the grid electrode of the IGBT tube is also connected with the main control unit IC1 through a resistor R4, and the resistor R4 is connected with 18V voltage through a diode D3 and is grounded through a capacitor C20.
The utility model provides an electromagnetic oven IGBT driving circuit, which is characterized in that an input voltage is connected with a coil panel after passing through a rectifying and filtering module, and is branched into a group of power circuits for supplying power to a singlechip and controlling a peripheral circuit, and the singlechip adjusts PPG in real time by detecting feedback signals of the work of the IGBT and the peripheral circuit signals so as to achieve an optimal working state;
And the IGBT driving control circuit adopts a singlechip with the model OB6654, and the driving output end of the IGBT driving control circuit is directly connected with the IGBT grid electrode through a resistor.
The working process of the utility model is as follows: the singlechip is driven by rectangular pulses sent by an IGBT driving module circuit integrated in the chip, and when the IGBT is conducted, the current flowing through the coil panel is rapidly increased. When the IGBT is turned off, the coil panel and the C1 generate series resonance, and the drain electrode of the IGBT generates high-voltage pulse to the ground. When the pulse drops to zero, the drive pulse will again be applied to the IGBT to turn it on. The process is repeated, high-frequency electromagnetic waves of 18KHZ-35KHZ are finally generated, and finally, the magnetic field induction eddy current heating is realized.
The utility model utilizes the singlechip with model OB6654, the integrated 18V driving capability of the chip, and the singlechip directly outputs PPG control signals which are enough to drive the IGBT to be turned on and off, compared with the traditional driving circuit, 3-4 triodes and the peripheral resistor, capacitor and other combined discrete elements are reduced, the space on a circuit board is saved, the production cost is reduced, and the reliability of the driving circuit is improved.
In this embodiment, one end of the capacitor C1 is grounded through a resistor R3, a resistor R8, a resistor R10, a resistor R12, a resistor R14, a resistor R17, and a resistor R19 in sequence, and a common connection end of the resistor R17 and the resistor R19 is connected with the main control unit IC 1;
The other end of the capacitor C1 is grounded through a resistor R1, a resistor R5, a resistor R11, a resistor R13, a resistor R15, a resistor R18 and a resistor R20 in sequence, and the common connection end of the resistor R18 and the resistor R20 is connected with the main control unit IC 1.
In this embodiment, the device further includes a thermistor T for detecting the IGBT tube, where one end of the thermistor is connected to the +5v through a resistor R34, and the other end of the thermistor is connected to the main control unit IC1, and the other end of the thermistor is grounded, where the module is used to detect the operating temperature of the IGBT module, and the resistance of the thermistor changes along with the temperature change, so that the voltage value of the +5v that reaches the main control unit IC1 after being divided by the voltage changes, thereby detecting the operating temperature of the IGBT tube.
In this embodiment, the device further includes a terminal TOP1 for connecting with a furnace surface probe, one end of the terminal TOP1 is connected with the +5v through a resistor R35, the other end is also connected with the main control unit IC1, and the other end is grounded, and the module is used for detecting the working temperature of the furnace surface.
The foregoing description of the preferred embodiments of the present application is not intended to limit the scope of the application, but rather is presented in the claims.
Claims (6)
1. The electromagnetic oven IGBT driving circuit is characterized by comprising an input end, wherein the input end is connected with a diode D1 and a diode D2, the diode D1 is grounded through a diode D4, a resistor R25 and a capacitor EC1 in sequence, the resistor R25 is also connected with a switching power supply U1, the output end of the switching power supply U1 is connected with the input end of a transformer winding T1 through a capacitor C19, a diode D6 is arranged between the output end of the transformer winding T1 and the capacitor C19, and the output end of the transformer winding T1 outputs 18V voltage;
The power supply system further comprises a main control unit IC1, wherein the VCC end of the main control unit IC1 receives 18V voltage, the LDO end of the main control unit IC1 outputs +5V, and the model of the main control unit IC1 is OB6654;
Still include the heating input, the heating input is connected with terminal LIN1 and the terminal LOUT1 that are used for being connected with the coil panel, be equipped with electric capacity C1 between terminal LIN1 and the terminal LOUT1, electric capacity C1 is connected with IGBT tube drain electrode, and its source ground, IGBT tube grid is connected through resistance R6 and diode ZD1 respectively, its grid still through resistance R4 with main control unit IC1 is connected, resistance R4 is connected with 18V voltage through diode D3, still is grounded through electric capacity C20.
2. The induction cooker IGBT drive circuit according to claim 1, characterized in that: one end of the capacitor C1 is grounded through a resistor R3, a resistor R8, a resistor R10, a resistor R12, a resistor R14, a resistor R17 and a resistor R19 in sequence, and the common connection end of the resistor R17 and the resistor R19 is connected with the main control unit IC 1;
The other end of the capacitor C1 is grounded through a resistor R1, a resistor R5, a resistor R11, a resistor R13, a resistor R15, a resistor R18 and a resistor R20 in sequence, and the common connection end of the resistor R18 and the resistor R20 is connected with the main control unit IC 1.
3. The induction cooker IGBT drive circuit according to claim 2, characterized in that: the intelligent control device is characterized by further comprising a thermistor T for detecting the IGBT tube, wherein one end of the thermistor T is connected with the +5V through a resistor R34, the end of the thermistor T is also connected with the main control unit IC1, and the other end of the thermistor T is grounded.
4. The induction cooker IGBT drive circuit according to claim 3, wherein: the furnace surface probe is characterized by further comprising a terminal TOP1 used for being connected with the furnace surface probe, one end of the terminal TOP1 is connected with the +5V through a resistor R35, the terminal is also connected with the main control unit IC1, and the other end of the terminal TOP1 is grounded.
5. The induction cooker IGBT drive circuit of claim 4, wherein: the output end of the transformer winding T1 is grounded through a capacitor EC3 and is also grounded through a resistor R38, the output end of the transformer winding T1 is connected with a diode D7, the output end of the diode D7 is grounded through a capacitor C14 and a capacitor EC4 respectively, and 18V voltage outputs a signal VIN through a resistor R39.
6. The induction cooker IGBT drive circuit of claim 5, wherein: the input end is grounded through a resistor R21, a resistor R23, a resistor R29 and a resistor R32 in sequence, the resistor R29 is grounded through a capacitor C12, and a VAD signal is sent to the main control unit IC 1;
The input end is further connected with the main control unit IC1 through a resistor R22, a resistor R24 and a resistor R30 in sequence, the resistor R30 is further connected with +5V through a diode D5 and used for voltage detection, and the resistor R30 is further grounded through a resistor R33.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323055554.5U CN221151597U (en) | 2023-11-10 | 2023-11-10 | IGBT driving circuit of electromagnetic oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323055554.5U CN221151597U (en) | 2023-11-10 | 2023-11-10 | IGBT driving circuit of electromagnetic oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221151597U true CN221151597U (en) | 2024-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323055554.5U Active CN221151597U (en) | 2023-11-10 | 2023-11-10 | IGBT driving circuit of electromagnetic oven |
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| Country | Link |
|---|---|
| CN (1) | CN221151597U (en) |
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2023
- 2023-11-10 CN CN202323055554.5U patent/CN221151597U/en active Active
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