CN106452406B - High-voltage high-frequency electronic switch based on pulse edge detection - Google Patents
High-voltage high-frequency electronic switch based on pulse edge detection Download PDFInfo
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- CN106452406B CN106452406B CN201610278392.7A CN201610278392A CN106452406B CN 106452406 B CN106452406 B CN 106452406B CN 201610278392 A CN201610278392 A CN 201610278392A CN 106452406 B CN106452406 B CN 106452406B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
- H03K17/722—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit
- H03K17/723—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit using transformer coupling
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/26—Push-pull amplifiers; Phase-splitters therefor
- H03F3/265—Push-pull amplifiers; Phase-splitters therefor with field-effect transistors only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a high-voltage high-frequency electronic switch based on pulse edge detection, which comprises: the device comprises a square wave generator, a push-pull circuit, a differentiating circuit, a transformer, at least 2 analog comparison units, at least 2 RS triggers and at least 2 power units; the output end of the differential circuit is connected to a primary coil of the primary side of the transformer, each secondary coil is sequentially connected with the analog comparison unit and an RS trigger, and the output end of the RS trigger is connected to the power unit; the analog comparison unit comprises a first analog comparator and a second analog comparator which are connected in parallel, a push-pull amplifying circuit is arranged between the RS trigger and the power unit, and the inverting input ends of the first analog comparator and the second analog comparator in each analog comparison unit are used as corresponding reference ground potential ends. The invention does not need to transmit power signals, greatly reduces the volume of the coupling transformer, breaks through any pulse width technology of the electronic switch, and can meet the vast majority of applications of power change and pulse power.
Description
Technical Field
The invention belongs to the technical field of application of power electronic devices, and particularly relates to a high-voltage high-frequency electronic switch based on pulse edge detection.
Background
The electronic switch is an operation unit for realizing circuit on-off by utilizing an electronic circuit and a power electronic device. The drive power pulses of existing electronic switches are coupled through a transformer. To accommodate any pulse width drive requirement, the coupling transformer volume must be designed to the product of the maximum pulse width and the drive voltage. Because the coupling magnetic ring is large in size, the size and weight of the driving circuit board are large, and even the rising edge characteristic of the driving circuit is influenced. Secondly, the existing driving circuit pushing stage mostly adopts a triode complementary push-pull circuit mode, and the circuit has the defects of large triode base electrode loss and low power supply utilization efficiency. Again, the existing electronic switch pair utilizes the parasitic diode of the device itself to form the reverse current path, which is suitable for operating frequencies around 1MHz due to the lower switching rate of the parasitic diode.
Disclosure of Invention
The invention aims to provide a high-voltage high-frequency electronic switch based on pulse edge detection, which does not need to transmit power signals, greatly reduces the size of a coupling transformer, breaks through any pulse width technology of the electronic switch, and can meet the requirements of most applications of power change and pulse power.
In order to achieve the above purpose, the invention adopts the following technical scheme: a high voltage high frequency electronic switch based on pulse edge detection, comprising: the power supply circuit comprises a square wave generator, a push-pull circuit, a differentiating circuit, a transformer, at least 2 analog comparison units, at least 2 RS triggers and at least 2 power units, wherein an NOT gate is arranged between the square wave generator and the push-pull circuit, the output end of the push-pull circuit is connected to the input end of the differentiating circuit, the secondary side of the transformer is provided with at least 2 secondary coils, and the secondary coils are sequentially connected in series with the analog comparison units, the RS triggers and the power units and have the same number;
the output end of the differential circuit is connected to a primary coil of the primary side of the transformer, each secondary coil is sequentially connected with the analog comparison unit and an RS trigger, and the output end of the RS trigger is connected to the power unit;
the analog comparison unit comprises a first analog comparator and a second analog comparator which are connected in parallel, wherein the non-inverting input end of the first analog comparator is connected with the high-potential output end of the secondary coil, the inverting input end of the first analog comparator is connected with the low-potential output end of the secondary coil, the inverting input end of the second analog comparator is connected with the high-potential output end of the secondary coil, and the non-inverting input end of the second analog comparator is connected with the low-potential output end of the secondary coil;
a push-pull amplifying circuit is arranged between the RS trigger and the power unit, and the inverting input ends of the first analog comparator and the second analog comparator in each analog comparison unit are used as corresponding reference ground potential ends which are used as the grounding ends of the power unit and the push-pull amplifying circuit.
The further improvement scheme in the technical scheme is as follows:
1. in the above scheme, the push-pull amplifying circuit comprises a first power MOS tube, a second power MOS tube and a third power MOS tube, wherein the second power MOS tube is connected with the third power MOS tube in parallel, and the first power MOS tube is connected with the second power MOS tube and the third power MOS tube in series.
2. In the above scheme, the differentiating circuit comprises a capacitor and an R1 resistor, the capacitor is connected in series with the primary coil of the transformer, and the R1 resistor is connected in parallel with the primary coil.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the high-voltage high-frequency electronic switch based on pulse edge detection is characterized in that a narrow pulse signal is formed firstly by pulse edge detection, a narrow pulse square wave signal is formed, then an RS trigger is restored to form a floating ground potential demodulation square wave signal, the floating ground potential demodulation square wave signal is amplified to 0-20V through a push-pull amplifying circuit 8 to drive a power unit 7, a driving circuit only needs to transmit rising edge and falling edge information of pulse voltage and does not need to transmit a power signal, the size of a coupling transformer is greatly reduced, any pulse width technology of the electronic switch is broken through, and most of applications of power change and pulse power can be met; and secondly, the grid floating power supply design technology greatly facilitates the application of high-voltage series electronic switches, and compared with a bootstrap type driving circuit, the driving circuit can meet the application of electronic switches with any voltage class (any series number).
Drawings
FIG. 1 is a schematic diagram of a partial structure of a high-voltage high-frequency electronic switch according to the present invention;
FIG. 2 is a schematic view of a portion of the structure of FIG. 1;
fig. 3 is a schematic diagram showing a partial structure of the high-voltage high-frequency electronic switch according to the present invention.
In the above figures: 1. a square wave generator; 2. a push-pull circuit; 3. a differentiating circuit; 4. a transformer; 5. an analog comparing unit; 51. a first analog comparator; 52. a second analog comparator; 6. an RS flip-flop; 7. a power unit; 8. a push-pull amplifying circuit; 81. a first power MOS tube; 82. a second power MOS tube; 83. and a third power MOS tube.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples:
example 1: a high-voltage high-frequency electronic switch based on pulse edge detection, as shown in figures 1-3, comprises: the power supply circuit comprises a square wave generator 1, a push-pull circuit 2, a differentiating circuit 3, a transformer 4, at least 2 analog comparison units 5, at least 2 RS triggers 6 and at least 2 power units 7, wherein a NOT gate is arranged between the square wave generator 1 and the push-pull circuit 2, the output end of the push-pull circuit 2 is connected to the input end of the differentiating circuit 3, the secondary side of the transformer 4 is provided with at least 2 secondary coils, and the secondary coils, the analog comparison units 5, the RS triggers 6 and the power units 7 are sequentially connected in series and have the same number;
the output end of the differentiating circuit 3 is connected to a primary coil of a primary side of a transformer, each secondary coil is sequentially connected with the analog comparing unit 5 and an RS trigger 6, and the output end of the RS trigger 6 is connected to the power unit 7;
the analog comparing unit 5 comprises a first analog comparator 51 and a second analog comparator 52 which are connected in parallel, wherein the non-inverting input end of the first analog comparator 51 is connected with the high-potential output end of the secondary coil, the inverting input end of the first analog comparator 51 is connected with the low-potential output end of the secondary coil, the inverting input end of the second analog comparator 52 is connected with the high-potential output end of the secondary coil, and the non-inverting input end of the second analog comparator 52 is connected with the low-potential output end of the secondary coil;
a push-pull amplifying circuit 8 is arranged between the RS trigger 6 and the power unit 7, and respective inverting input ends of the first analog comparator 51 and the second analog comparator 52 in each analog comparing unit 5 are used as corresponding reference ground potential ends, and the reference ground potential ends are used as grounding ends of the power unit 7 and the push-pull amplifying circuit 8.
The push-pull amplifying circuit 8 includes a first power MOS transistor 81, a second power MOS transistor 82, and a third power MOS transistor 83, the second power MOS transistor 82 is connected in parallel with the third power MOS transistor 83, and the first power MOS transistor 81 is connected in series with the second power MOS transistor 82 and the third power MOS transistor 83.
The differentiating circuit 3 comprises a capacitor C1 and an R1 resistor, the capacitor C1 being connected in series with the primary winding of the transformer 4, the R1 resistor being connected in parallel with the primary winding.
Example 2: a high-voltage high-frequency electronic switch based on pulse edge detection, as shown in figures 1-3, comprises: the power supply circuit comprises a square wave generator 1, a push-pull circuit 2, a differentiating circuit 3, a transformer 4, at least 2 analog comparison units 5, at least 2 RS triggers 6 and at least 2 power units 7, wherein a NOT gate is arranged between the square wave generator 1 and the push-pull circuit 2, the output end of the push-pull circuit 2 is connected to the input end of the differentiating circuit 3, the secondary side of the transformer 4 is provided with at least 2 secondary coils, and the secondary coils, the analog comparison units 5, the RS triggers 6 and the power units 7 are sequentially connected in series and have the same number;
the output end of the differentiating circuit 3 is connected to a primary coil of a primary side of a transformer, each secondary coil is sequentially connected with the analog comparing unit 5 and an RS trigger 6, and the output end of the RS trigger 6 is connected to the power unit 7;
the analog comparing unit 5 comprises a first analog comparator 51 and a second analog comparator 52 which are connected in parallel, wherein the non-inverting input end of the first analog comparator 51 is connected with the high-potential output end of the secondary coil, the inverting input end of the first analog comparator 51 is connected with the low-potential output end of the secondary coil, the inverting input end of the second analog comparator 52 is connected with the high-potential output end of the secondary coil, and the non-inverting input end of the second analog comparator 52 is connected with the low-potential output end of the secondary coil;
a push-pull amplifying circuit 8 is arranged between the RS trigger 6 and the power unit 7, and respective inverting input ends of the first analog comparator 51 and the second analog comparator 52 in each analog comparing unit 5 are used as corresponding reference ground potential ends, and the reference ground potential ends are used as grounding ends of the power unit 7 and the push-pull amplifying circuit 8.
The push-pull amplifying circuit 8 includes a first power MOS transistor 81, a second power MOS transistor 82, and a third power MOS transistor 83, the second power MOS transistor 82 is connected in parallel with the third power MOS transistor 83, and the first power MOS transistor 81 is connected in series with the second power MOS transistor 82 and the third power MOS transistor 83.
The differentiating circuit 3 comprises a capacitor C1 and an R1 resistor, the capacitor C1 being connected in series with the primary winding of the transformer 4, the R1 resistor being connected in parallel with the primary winding.
The working process of the high-voltage high-frequency electronic switch is as follows: firstly, a TTL square wave signal generated by a square wave generator 1 is converted into a narrow pulse signal only carrying a rising front edge and a falling rear edge through a differential circuit 3; then, through the coupling of the transformer 4, at least 2 secondary coils on the secondary side of the transformer 4 form at least 2 processed narrow pulse signals with different reference ground potentials, and the processed narrow pulse signals are passed through
The analog comparison unit 5 forms a narrow pulse square wave signal, the non-inverting input end of the first analog comparator 51 is connected with the high potential output end of the secondary coil, the inverting input end of the first analog comparator 51 is connected with the low potential output end of the secondary coil, the positive narrow pulse in the processed narrow pulse signal is converted into a positive narrow pulse square wave, the inverting input end of the second analog comparator 52 is connected with the high potential output end of the secondary coil, the non-inverting input end of the second analog comparator 52 is connected with the low potential output end of the secondary coil, and the negative narrow pulse in the processed narrow pulse signal is converted into a negative narrow pulse square wave which is converted into a positive narrow pulse square wave;
the narrow pulse square wave signal forms a demodulated floating ground potential demodulation square wave signal through the RS trigger 6, the floating ground potential demodulation square wave signal is amplified to 0-20V through the push-pull amplifying circuit 8 to drive the power unit 7, and the GND potential of the power supply is embedded on the source potential of the power MOSFET, so that the application of the high-voltage series electronic switch is greatly facilitated.
When the high-voltage high-frequency electronic switch based on pulse edge detection is adopted, a narrow pulse signal is formed firstly by pulse edge detection, a narrow pulse square wave signal is formed, then an RS trigger is restored to form a floating ground potential demodulation square wave signal, the floating ground potential demodulation square wave signal is amplified to 0-20V through a push-pull amplifying circuit 8 to drive a power unit 7, a driving circuit only needs to transmit rising edge and falling edge information of pulse voltage, a power signal is not required to be transmitted, the size of a coupling transformer is greatly reduced, any pulse width technology of the electronic switch is broken through, and most of applications of power change and pulse power can be met; and secondly, the grid floating power supply design technology greatly facilitates the application of high-voltage series electronic switches, and compared with a bootstrap type driving circuit, the driving circuit can meet the application of electronic switches with any voltage class (any series number).
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (1)
1. The utility model provides a high-voltage high-frequency electronic switch based on pulse edge detects which characterized in that: comprising the following steps: the power supply circuit comprises a square wave generator (1), a push-pull circuit (2), a differential circuit (3), a transformer (4), at least 2 analog comparison units (5), at least 2 RS triggers (6) and at least 2 power units (7), wherein a NOT gate is arranged between the square wave generator (1) and the push-pull circuit (2), the output end of the push-pull circuit (2) is connected to the input end of the differential circuit (3), the secondary side of the transformer (4) is provided with at least 2 secondary coils, and the secondary coils are sequentially connected with the analog comparison units (5), the RS triggers (6) and the power units (7) in series and have the same number;
the output end of the differentiating circuit (3) is connected to a primary coil of the primary side of the transformer, each secondary coil is sequentially connected with the analog comparing unit (5) and an RS trigger (6), and the output end of the RS trigger (6) is connected to the power unit (7);
the analog comparison unit (5) comprises a first analog comparator (51) and a second analog comparator (52) which are connected in parallel, wherein the non-inverting input end of the first analog comparator (51) is connected with the high-potential output end of the secondary coil, the inverting input end of the first analog comparator (51) is connected with the low-potential output end of the secondary coil, the inverting input end of the second analog comparator (52) is connected with the high-potential output end of the secondary coil, and the non-inverting input end of the second analog comparator (52) is connected with the low-potential output end of the secondary coil;
a push-pull amplifying circuit (8) is arranged between the RS trigger (6) and the power unit (7), and the respective inverting input ends of the first analog comparator (51) and the second analog comparator (52) in each analog comparison unit (5) are used as corresponding reference ground potential ends which are used as the grounding ends of the power unit (7) and the push-pull amplifying circuit (8);
the push-pull amplifying circuit (8) comprises a first power MOS tube (81), a second power MOS tube (82) and a third power MOS tube (83), wherein the second power MOS tube (82) is connected with the third power MOS tube (83) in parallel, and the first power MOS tube (81) is connected with the second power MOS tube (82) and the third power MOS tube (83) in series;
the differentiating circuit (3) comprises a capacitor (C1) and an R1 resistor, the capacitor (C1) is connected in series with the primary coil of the transformer (4), and the R1 resistor is connected in parallel with the primary coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610278392.7A CN106452406B (en) | 2016-04-29 | 2016-04-29 | High-voltage high-frequency electronic switch based on pulse edge detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610278392.7A CN106452406B (en) | 2016-04-29 | 2016-04-29 | High-voltage high-frequency electronic switch based on pulse edge detection |
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| Publication Number | Publication Date |
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| CN106452406A CN106452406A (en) | 2017-02-22 |
| CN106452406B true CN106452406B (en) | 2023-10-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107390183B (en) * | 2017-08-22 | 2023-05-12 | 无锡晶磊电子有限公司 | Narrow pulse width high frequency modulator |
| CN109698683B (en) * | 2017-10-23 | 2023-04-25 | 新乡市振源电器股份有限公司 | High-voltage thyristor driving device and high-voltage equipment |
| CN109831186A (en) * | 2018-12-27 | 2019-05-31 | 西南技术物理研究所 | A kind of electric-optically Q-switched circuit of micro integrated low-power consumption |
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| CN1938935A (en) * | 2004-01-09 | 2007-03-28 | 罗姆股份有限公司 | Power transistor protecting circuit of motor drive circuit, motor drive circuit, and semiconductor device |
| CN203942267U (en) * | 2014-06-27 | 2014-11-12 | 河北朗天信息科技有限公司 | A kind of quick breaking circuit based on current mode integrated manipulator |
| CN105024557A (en) * | 2015-08-07 | 2015-11-04 | 姚晓武 | Power circuit for driving insulted gate bipolar transistor (IGBT) |
| CN204886740U (en) * | 2015-08-28 | 2015-12-16 | 山东艾诺仪器有限公司 | Hard switch drive circuit of full -bridge contravariant |
| CN205596090U (en) * | 2016-04-29 | 2016-09-21 | 苏州泰思特电子科技有限公司 | High pressure high frequency electronic switch based on pulse edge detection |
-
2016
- 2016-04-29 CN CN201610278392.7A patent/CN106452406B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1938935A (en) * | 2004-01-09 | 2007-03-28 | 罗姆股份有限公司 | Power transistor protecting circuit of motor drive circuit, motor drive circuit, and semiconductor device |
| CN203942267U (en) * | 2014-06-27 | 2014-11-12 | 河北朗天信息科技有限公司 | A kind of quick breaking circuit based on current mode integrated manipulator |
| CN105024557A (en) * | 2015-08-07 | 2015-11-04 | 姚晓武 | Power circuit for driving insulted gate bipolar transistor (IGBT) |
| CN204886740U (en) * | 2015-08-28 | 2015-12-16 | 山东艾诺仪器有限公司 | Hard switch drive circuit of full -bridge contravariant |
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