CN217643322U - IGBT tube driving circuit and electromagnetic heating equipment - Google Patents
IGBT tube driving circuit and electromagnetic heating equipment Download PDFInfo
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- CN217643322U CN217643322U CN202221199500.9U CN202221199500U CN217643322U CN 217643322 U CN217643322 U CN 217643322U CN 202221199500 U CN202221199500 U CN 202221199500U CN 217643322 U CN217643322 U CN 217643322U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to an electromagnetic heating technical field discloses a IGBT manages drive circuit and electromagnetic heating equipment. The IGBT tube driving circuit comprises a detection circuit, a control circuit, a driving circuit, an IGBT tube and an LC oscillating circuit; the detection circuit is used for detecting the envelope voltage of the alternating current when the alternating current is connected; the control circuit is used for outputting a first control signal when the envelope voltage is in a first voltage stage and outputting a second control signal when the envelope voltage is in a second voltage stage; the driving circuit is used for receiving the first control signal or the second control signal and outputting corresponding driving voltage to the grid electrode of the IGBT tube so that the IGBT tube is conducted when receiving the driving voltage. The utility model discloses a control output to IGBT manages drive signal's duty cycle to make IGBT pipe drive signal's duty cycle when being in the high pressure under low power state be greater than the drive signal's when being in the low pressure duty cycle, but make electromagnetic heating equipment continuous heating.
Description
Technical Field
The utility model belongs to the technical field of the electromagnetic heating technique and specifically relates to a IGBT manages drive circuit and electromagnetic heating equipment.
Background
In the prior art, IH heating products such as an induction cooker, an IH electric cooker, a pressure cooker and the like mostly adopt a single-tube IGBT tube scheme due to cost reasons. Under the high-power working state, the collector of the IGBT tube has very high voltage, the IGBT tube with the pressure-resistant 1350V specification is usually adopted, the high voltage of the collector is limited below 1080V, and the high power is limited to about 2000W; and under low power operating condition, the non-zero voltage of IGBT pipe is switched on, and the conduction voltage is high, and the electric current of conducting in the twinkling of an eye is big, and the IGBT pipe can be overheated and even explode the machine and damage, therefore low power operating condition is intermittent heating, and the heating is stopped after the several seconds of heating of the 50% of high power mode of sampling usually, and then reheat several seconds, so the circulation goes on, culinary art effect and user experience are poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a IGBT manages drive circuit and electromagnetic heating equipment to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.
In a first aspect, an IGBT tube driving circuit is provided, which includes a detection circuit, a control circuit, a driving circuit, an IGBT tube, and an LC oscillating circuit;
the detection circuit, the control circuit, the drive circuit and the grid electrode of the IGBT tube are electrically connected in sequence, and the collector electrode of the IGBT tube is electrically connected with the LC oscillating circuit;
the detection circuit is used for detecting the envelope voltage of the alternating current when the alternating current is connected;
the control circuit is used for outputting a first control signal when the envelope voltage is in a first voltage stage and outputting a second control signal when the envelope voltage is in a second voltage stage;
the driving circuit is used for receiving the first control signal or the second control signal and outputting corresponding driving voltage to the grid electrode of the IGBT tube so that the IGBT tube is conducted when receiving the driving voltage;
the duty ratio of the first control signal is larger than that of the second control signal, and the voltage peak value of the envelope voltage is in a first voltage stage.
According to the utility model discloses an embodiment, detection circuitry includes first diode, second diode, first resistance, second resistance, third resistance and first switch tube;
the positive pole of first diode is used for the electricity to connect the live wire, and the positive pole of second diode is used for the electricity to connect the zero line, and the negative pole of first diode and the one end of the first resistance of second diode electric connection, the trigger end of the other end of first resistance and the one end electricity of second resistance connection first switch tube, the first end electricity connection control circuit of first switch tube and through third resistance electricity connection DC voltage, the second end of first switch tube and the other end ground connection of second resistance.
According to the utility model discloses an embodiment, first switch tube chooses NPN type triode or N type MOS pipe for use.
According to the utility model discloses an embodiment, drive circuit includes level transition sub-circuit and push-pull drive sub-circuit, and the grid that control circuit, level transition sub-circuit, push-pull drive sub-circuit and IGBT pipe are connected in order.
According to an embodiment of the present invention, the level shift sub-circuit includes a second transistor, a fourth resistor, a fifth resistor, and a sixth resistor;
one end of the fourth resistor and one end of the sixth resistor are connected with direct-current voltage, the other end of the fourth resistor and one end of the fifth resistor are connected with the control circuit, the other end of the fifth resistor is connected with a base electrode of the second triode, the other end of the sixth resistor and the input end of the push-pull driving sub-circuit are connected with a collector electrode of the second triode, and an emitting electrode of the second triode is grounded.
According to an embodiment of the present invention, the push-pull driving sub-circuit includes a third transistor, a fourth transistor, a seventh resistor, and an eighth resistor;
the base electrode of the third triode and the base electrode of the fourth triode are connected with the output end of the level conversion sub-circuit, the collector electrode of the third triode is connected with direct current voltage, the emitter electrode of the third triode is connected with the grid electrode of the IGBT device through a seventh resistor and is connected with the emitter electrode of the fourth triode through an eighth resistor, the collector electrode of the fourth triode is grounded, the third triode is an NPN type triode, and the fourth triode is a PNP type triode.
According to the utility model discloses an embodiment, detection circuitry and control circuit integration package or drive circuit and control circuit or detection circuitry, control circuit and drive circuit integration package.
According to an embodiment of the invention, the duty cycle of the second control signal is zero.
According to an embodiment of the invention, the duty cycle of the first control signal and/or the duty cycle of the second control signal is positively correlated with the value of the envelope voltage.
In a second aspect, an electromagnetic heating device is provided, which includes the IGBT tube driving circuit according to the first aspect.
The utility model has the advantages that: by controlling the duty ratio of the driving signal output to the IGBT tube in stages, the duty ratio of the driving signal when the IGBT tube is in a high voltage state under a low power state is larger than the duty ratio of the driving signal when the IGBT tube is in a low voltage state, the collector voltage of the IGBT tube and the resonance input energy of the electromagnetic coil are reduced under the low voltage state, and the non-zero conduction voltage and the conduction loss of the IGBT tube are reduced under the high voltage state.
Drawings
Fig. 1 is one of the schematic structural diagrams of the IGBT driving circuit according to the embodiment of the present invention.
Fig. 2 is a schematic diagram of a control waveform of an IGBT driving circuit according to an embodiment of the present invention.
Fig. 3 is a second schematic diagram of the control waveform of the IGBT driving circuit according to the embodiment of the present invention.
Fig. 4 is a third schematic diagram of a control waveform of the IGBT driving circuit according to the embodiment of the present invention.
Fig. 5 is a fourth schematic diagram of a control waveform of the IGBT driving circuit according to the embodiment of the present invention.
Fig. 6 is a fifth schematic diagram of a control waveform of the IGBT driving circuit according to the embodiment of the present invention.
Fig. 7 is a second schematic structural diagram of an IGBT driving circuit according to an embodiment of the present invention.
Fig. 8 is a third schematic structural diagram of an IGBT driving circuit according to an embodiment of the present invention.
Fig. 9 is a fourth schematic structural diagram of an IGBT driving circuit according to an embodiment of the present invention.
Fig. 10 is a fifth schematic diagram of the IGBT driving circuit according to the embodiment of the present invention.
Fig. 11 is a sixth schematic diagram of the IGBT driving circuit according to the embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the present invention will be further described with reference to the following embodiments and accompanying drawings.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of terms means an indefinite amount, and a plurality of terms means two or more, and the terms greater than, less than, exceeding, etc. are understood to include no essential numbers, and the terms greater than, less than, within, etc. are understood to include essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. Additionally, appearing throughout and/or representing three side-by-side scenarios, e.g., A and/or B represents a scenario satisfied by A, a scenario satisfied by B, or a scenario satisfied by both A and B.
In the description of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, which may contain other elements not expressly listed in addition to those listed.
According to the utility model discloses an aspect provides a IGBT manages drive circuit.
As shown in fig. 1, an embodiment of the present invention provides an IGBT tube driving circuit including a detection circuit 100, a control circuit 200, a driving circuit 300, an IGBT tube 400, and an LC oscillating circuit 500.
The detection circuit 100, the control circuit 200, the drive circuit 300 and the gate of the IGBT tube 400 are electrically connected in sequence, and the collector of the IGBT tube 400 is electrically connected to the LC oscillation circuit 500.
In practical use, the detection circuit 100 is configured to detect an envelope voltage of an alternating current when the alternating current is connected, the control circuit 200 is configured to output a first control signal when the envelope voltage is in a first voltage stage and output a second control signal when the envelope voltage is in a second voltage stage, and the driving circuit 300 is configured to receive the first control signal or the second control signal and output a corresponding driving voltage to the gate of the IGBT tube 400, so that the IGBT tube 400 is turned on when receiving the driving voltage. The duty ratio of the first control signal is larger than that of the second control signal, and the voltage peak value of the envelope voltage is in the first voltage phase.
The utility model provides a IGBT manages drive circuit can be at low power mode (for example 50% of rated power) continuous operation, the alternating current is followed detection circuitry 100 and is inputed, control circuit 200 for example MCU (microprocessor) acquires the envelope voltage waveform that detection circuitry 100 detected the alternating current, and then according to the present voltage phase output first control signal or the second control signal at place of envelope voltage, the difference of first control signal and second control signal lies in the duty cycle, receive first control signal or second control signal's drive circuit 300 output drive voltage, so that IGBT pipe 400 switches on when receiving drive voltage, thereby control LC oscillating circuit 500's break-make.
Because the duty ratio of the first control signal is greater than that of the second control signal, when the control circuit 200 outputs the first control signal, the driving voltage output by the driving circuit 300 receiving the first control signal is relatively large, so that the non-zero conduction voltage and the conduction loss of the IGBT tube 400 are reduced, and when the control circuit 200 outputs the second control signal, the driving voltage output by the driving circuit 300 receiving the second control signal is relatively small, so that the resonance input energy from the LC oscillation circuit 500 is reduced, and the collector voltage of the IGBT tube 400 is reduced.
As shown in fig. 2, in one embodiment, the envelope voltage is divided into a first voltage phase and two second voltage phases within a half of a complete power supply cycle, wherein the peak voltage of the envelope voltage is in the first voltage phase, and the two second voltage phases are respectively located at the left and right sides of the first voltage phase.
IGBT tube 400 is in a low power state (e.g., 50% of rated power). When the envelope voltage obtained from the detection circuit 100 is in the first voltage stage, the control circuit 200 outputs a first control signal with a relatively large duty ratio, so that the resonance input energy of the LC oscillating circuit 500 in the first voltage stage is increased, and the non-zero conduction voltage and the conduction loss of the IGBT tube 400 are reduced; when the envelope voltage obtained from the detection circuit 100 is in the second voltage stage, the control circuit 200 outputs a second control signal with a relatively small duty ratio, so that the resonant input energy of the LC oscillating circuit 500 is reduced, and the power of the electromagnetic heating device is compensated.
As shown in fig. 3 and 4, in some embodiments, the envelope voltage is divided into a first voltage phase and a second voltage phase by dividing the envelope voltage into half a full power cycle, the peak voltage of the envelope voltage being within the first voltage phase.
IGBT diode 400 is in a low power state (e.g., 50% of rated power). When the envelope voltage obtained from the detection circuit 100 is in the first voltage stage, the control circuit 200 outputs a first control signal with a relatively large duty ratio, so that the resonance input energy of the LC oscillating circuit 500 in the first voltage stage is increased, and the non-zero conduction voltage and the conduction loss of the IGBT tube 400 are reduced; when the envelope voltage obtained from the detection circuit 100 is in the second voltage stage, the control circuit 200 outputs the second control signal with a relatively small duty ratio, so that the resonance input energy of the LC oscillating circuit 500 is reduced, and the power of the electromagnetic heating device is compensated.
As shown in fig. 5 and 6, in some embodiments, the envelope voltage is divided into two phases within a half of a full power supply cycle, a first voltage phase in which the peak voltage of the envelope voltage is located and one or two second voltage phases respectively located on the left or right of the first voltage phase.
Wherein the duty cycle of the second control signal is zero. The control circuit 200 suspends the output of the driving signal in the second voltage phase and resumes the output of the driving signal in the first voltage phase, further reducing the resonance input energy of the LC oscillating circuit 500.
In one embodiment, the duty cycle of the first control signal and/or the duty cycle of the second control signal is positively correlated with the value of the envelope voltage. For example, the duty cycle at which the control circuit 200 outputs the first control signal increases as the value of the envelope voltage increases in the first voltage phase of the envelope voltage, or the duty cycle at which the control circuit 200 outputs the second control signal decreases as the value of the envelope voltage decreases in the second voltage phase of the envelope voltage.
The specific structure of the IGBT tube driving circuit provided by the present invention is explained below.
As shown in fig. 7, in one embodiment, the detection circuit 100 includes a first diode D1, a second diode D2, a first resistor R1, a second resistor R2, a third resistor R3, and a first switch Q1.
Wherein, first diode D1's positive pole is used for the electricity to connect live wire L, second diode D2's positive pole is used for the electricity to connect zero line N, first diode D1's negative pole and second diode D2's negative pole electricity connection first resistance R1's one end, first switch tube Q1's trigger end is connected to first resistance R1's the other end and second resistance R2's one end electricity, control circuit 200 is connected to first switch tube Q1's first end electricity and direct current voltage is connected through third resistance R3 electricity, first switch tube Q1's second end and second resistance R2's other end ground connection.
The detection circuit 100 collects the envelope voltage of the alternating current based on the principle of zero-crossing detection. Voltages in two directions of the alternating current are respectively input from the first diode D1 or the second diode D2, the first switch tube Q1 is triggered to be conducted in turn, the control circuit 200 obtains an envelope voltage waveform from the first end of the first switch tube Q1, and then outputs a first control signal or a second control signal.
The first switch tube Q1 is an NPN-type triode or an N-type MOS tube. When the first switching tube Q1 is an NPN-type triode, the trigger end of the first switching tube Q1 is a base electrode, the first end is a collector electrode, and the second end is an emitter electrode; when the first switch tube Q1 selects the N-type MOS transistor, the trigger end of the first switch tube Q1 is the gate, the first end is the drain, and the second end is the source.
As shown in fig. 8, in one embodiment, the driving circuit 300 includes a level shift sub-circuit 310 and a push-pull driving sub-circuit 320, and the control circuit 200, the level shift sub-circuit 310, the push-pull driving sub-circuit 320 and the gate of the IGBT tube 400 are connected in sequence.
The level shift sub-circuit 310 includes a second transistor Q2, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. One end of the fourth resistor R4 and one end of the sixth resistor R6 are connected to the dc voltage, the other end of the fourth resistor R4 and one end of the fifth resistor R5 are connected to the control circuit 200, the other end of the fifth resistor R5 is connected to the base of the second triode Q2, the other end of the sixth resistor R6 and the input end of the push-pull driving sub-circuit 320 are connected to the collector of the second triode Q2, and the emitter of the second triode Q2 is grounded.
The push-pull driving sub-circuit 320 includes a third transistor Q3, a fourth transistor Q4, a seventh resistor R7, and an eighth resistor R8. The base of the third triode Q3 and the base of the fourth triode Q4 are connected with the output end of the level conversion sub-circuit 310, the collector of the third triode Q3 is connected with direct current voltage, the emitter of the third triode Q3 is connected with the grid of the IGBT device through the seventh resistor R7 and is connected with the emitter of the fourth triode Q4 through the eighth resistor R8, the collector of the fourth triode Q4 is grounded, the third triode Q3 selects an NPN-type triode, and the fourth triode Q4 selects a PNP-type triode.
The level shift sub-circuit 310 receives the driving signal output by the control circuit 200, and the level of the driving signal changes alternately, so that the third transistor Q3 and the fourth transistor Q4 of the push-pull driving sub-circuit 320 are switched on alternately, specifically, when the driving signal is at a low level, the second transistor Q2 and the fourth transistor Q4 are switched off, the third transistor Q3 is switched on to output a dc voltage as a driving voltage for driving the IGBT tube 400, and conversely, the second transistor Q2 and the fourth transistor Q4 are switched on, the third transistor Q3 is switched off, and no driving voltage is output to the IGBT tube 400.
As shown in fig. 9 to 11, in some embodiments, the detection circuit 100 and the control circuit 200 are integrally packaged, or the driving circuit 300 and the control circuit 200, or the detection circuit 100, the control circuit 200 and the driving circuit 300 are integrally packaged, and after integration, a control chip may be formed, so as to reduce the system volume.
According to the utility model discloses IGBT pipe drive circuit exports the duty cycle to IGBT pipe 400's drive signal through controlling stage by stage to make IGBT pipe 400 drive signal's when being in the high pressure duty cycle under the low power state be greater than the duty cycle of the drive signal when being in the low pressure, IGBT pipe 400's collector voltage and solenoid's resonance input energy can reduce when the low pressure, IGBT pipe 400's non-zero on-voltage and conduction loss can reduce when the high pressure.
According to a second aspect of the present invention, an electromagnetic heating apparatus is provided.
The electromagnetic heating device comprises the IGBT tube driving circuit of the first aspect, and the electromagnetic heating device of the embodiment adopts all technical schemes of all the embodiments, and at least has all beneficial effects brought by the technical schemes of the embodiments.
The electromagnetic heating equipment can be household electromagnetic heating products such as an electromagnetic oven, an electromagnetic rice cooker or an electromagnetic pressure cooker.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The IGBT tube driving circuit is characterized by comprising a detection circuit, a control circuit, a driving circuit, an IGBT tube and an LC oscillating circuit;
the detection circuit, the control circuit, the drive circuit and the grid electrode of the IGBT tube are electrically connected in sequence, and the collector electrode of the IGBT tube is electrically connected with the LC oscillating circuit;
the detection circuit is used for detecting the envelope voltage of the alternating current when the alternating current is connected;
the control circuit is used for outputting a first control signal when the envelope voltage is in a first voltage stage and outputting a second control signal when the envelope voltage is in a second voltage stage;
the driving circuit is used for receiving the first control signal or the second control signal and outputting corresponding driving voltage to the grid electrode of the IGBT tube so that the IGBT tube is conducted when receiving the driving voltage;
and the duty ratio of the first control signal is greater than that of the second control signal, and the voltage peak value of the envelope voltage is in a first voltage phase.
2. The IGBT tube driving circuit according to claim 1, wherein the detection circuit comprises a first diode, a second diode, a first resistor, a second resistor, a third resistor and a first switch tube;
the positive pole of first diode is used for the electricity to connect the live wire, the positive pole of second diode is used for the electricity to connect the zero line, the negative pole of first diode and the one end of the first resistance of second diode electric connection, the trigger end of the other end of first resistance and the one end electricity connection of second resistance first switch tube, the first end electricity connection control circuit of first switch tube and through third resistance electricity connection DC voltage, the second end of first switch tube and the other end ground connection of second resistance.
3. The IGBT tube driving circuit according to claim 2, wherein the first switching tube is an NPN-type triode or an N-type MOS transistor.
4. The IGBT tube driving circuit according to claim 1, wherein the driving circuit comprises a level conversion sub-circuit and a push-pull driving sub-circuit, and the control circuit, the level conversion sub-circuit, the push-pull driving sub-circuit and the gate of the IGBT tube are connected in sequence.
5. The IGBT tube driving circuit according to claim 4, wherein the level shift sub-circuit comprises a second triode, a fourth resistor, a fifth resistor and a sixth resistor;
direct current voltage is connected to one end of the fourth resistor and one end of the sixth resistor, the other end of the fourth resistor and one end of the fifth resistor are connected with the control circuit, the other end of the fifth resistor is connected with a base electrode of the second triode, the other end of the sixth resistor and an input end of the push-pull driving sub-circuit are connected with a collector electrode of the second triode, and an emitting electrode of the second triode is grounded.
6. The IGBT transistor driving circuit according to claim 4, wherein the push-pull driving sub-circuit comprises a third triode, a fourth triode, a seventh resistor and an eighth resistor;
the base of the third triode and the base of the fourth triode are connected with the output end of the level conversion sub-circuit, the collector of the third triode is connected with direct current voltage, the emitter of the third triode is connected with the grid of the IGBT device through a seventh resistor and connected with the emitter of the fourth triode through an eighth resistor, the collector of the fourth triode is grounded, the third triode is selected from NPN type triodes, and the fourth triode is selected from PNP type triodes.
7. The IGBT tube driving circuit according to any one of claims 1 to 6, wherein the detection circuit and the control circuit are integrally packaged or the driving circuit and the control circuit are integrally packaged or the detection circuit, the control circuit and the driving circuit are integrally packaged.
8. The IGBT tube driving circuit according to any one of claims 1-6, wherein the duty cycle of the second control signal is zero.
9. The IGBT tube driving circuit according to any one of claims 1-6, wherein the duty cycle of the first control signal and/or the duty cycle of the second control signal is positively correlated with the value of the envelope voltage.
10. Electromagnetic heating device, characterized in that it comprises an IGBT tube driver circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221199500.9U CN217643322U (en) | 2022-05-18 | 2022-05-18 | IGBT tube driving circuit and electromagnetic heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221199500.9U CN217643322U (en) | 2022-05-18 | 2022-05-18 | IGBT tube driving circuit and electromagnetic heating equipment |
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| Publication Number | Publication Date |
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| CN217643322U true CN217643322U (en) | 2022-10-21 |
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| CN202221199500.9U Active CN217643322U (en) | 2022-05-18 | 2022-05-18 | IGBT tube driving circuit and electromagnetic heating equipment |
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| CN (1) | CN217643322U (en) |
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- 2022-05-18 CN CN202221199500.9U patent/CN217643322U/en active Active
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