CN210640870U - Driving circuit - Google Patents
Driving circuit Download PDFInfo
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- CN210640870U CN210640870U CN201922157487.5U CN201922157487U CN210640870U CN 210640870 U CN210640870 U CN 210640870U CN 201922157487 U CN201922157487 U CN 201922157487U CN 210640870 U CN210640870 U CN 210640870U
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Abstract
The utility model provides a drive circuit relates to electronic circuit technical field, include: the pulse drive control circuit, the transformer, the rectification voltage stabilizing circuit and the switching element unit; the pulse driving control circuit comprises a pulse generating circuit and a power amplifier circuit, and transmits a control pulse signal to a primary coil of the transformer through the power amplifier circuit; the input of rectification voltage stabilizing circuit with the secondary coil of transformer links to each other and is used for carrying out the rectification steady voltage to alternating voltage, the input of switching element unit with rectification voltage stabilizing circuit's output is connected, the utility model discloses simple structure, reliability height have just realized electrical isolation protection, are applicable to the powerful application scene in the well.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially involves a drive circuit.
Background
With the development of power semiconductor devices, many power switching devices have appeared, wherein MOSFETs have the advantages of high switching speed, low required driving power, and the like, and are widely used, and driving circuits for driving the MOSFETs are also various, at present, asymmetric half-bridge MOSFET driving circuits are more and more widely used, but the existing asymmetric half-bridge driving circuits have the problem of complex structure, some require dual power supplies, or require more transformers and other components, resulting in larger occupied space, and some designs use special chips, resulting in increased cost.
In summary, it is a problem to be solved by those skilled in the art to provide a driving circuit with simple structure, low cost, and electrical isolation suitable for medium and high power application scenarios.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned problems and needs, the present invention provides a driving circuit, which can solve the above-mentioned technical problems due to the following technical solutions.
In order to achieve the above object, the utility model provides a following technical scheme: a drive circuit, comprising: the pulse drive control circuit, the transformer, the rectification voltage stabilizing circuit and the switching element unit; the pulse driving control circuit comprises a pulse generating circuit and a power amplifier circuit, and transmits a control pulse signal to a primary coil of the transformer through the power amplifier circuit; the input end of the rectification voltage stabilizing circuit is connected with the secondary coil of the transformer and used for rectifying and stabilizing alternating voltage, and the input end of the switch element unit is connected with the output end of the rectification voltage stabilizing circuit.
Further, the pulse generating circuit is a single pulse generating circuit.
Further, the power amplifier circuit includes a resistor R3, a resistor R4, a polar capacitor C3, a diode D1, a diode D2, an NPN transistor Q1, and a PNP transistor Q2, wherein one end of the resistor R3, one end of the resistor R4, an anode of the diode D1, and an anode of the diode D2 are connected in parallel to form an input port of the power amplifier circuit, the input port is connected to the pulse output port of the single pulse generation circuit to receive the control pulse signal, the other end of the resistor R3 is connected to a cathode of the diode D1 and a base of the NPN transistor Q1, the other end of the resistor R4 is connected to a cathode of the diode D2 and a base of the PNP transistor Q2, an emitter of the NPN transistor Q1 is connected to an emitter of the PNP transistor Q2 to form an output port of the power amplifier circuit, a collector of the NPN transistor Q1 is grounded via the polar capacitor C3, the collector of the PNP type triode Q2 is grounded.
Further, the transformer is a soft magnetic core three-winding transformer.
Furthermore, the output end of the power amplifier circuit is connected with one end of the primary coil of the transformer through a non-polar capacitor C4 for filtering, and the other end of the primary coil of the transformer is grounded.
Further, the rectifying and voltage stabilizing circuit comprises a resistor R5, a resistor R6, a resistor R7, a resistor R8, a nonpolar capacitor C5, a nonpolar capacitor C6, a PNP triode Q3, a PNP triode Q4, a diode D3, a diode D4, a zener diode D5, and a zener diode D6, wherein one end of the resistor R5 and one end of the nonpolar capacitor C5 are connected to one end of a secondary coil of the transformer, the other end of the resistor R5 and the other end of the nonpolar capacitor C5, an anode of the diode D3, a base of the PNP triode Q3 and one end of the resistor R7 are connected in parallel, a cathode of the diode D3, an emitter of the PNP triode Q3, and a cathode of the zener diode D5 are connected in parallel to form a first output end of the rectifying and the other end of the secondary coil of the transformer, the other end of the resistor R7, a collector of the PNP triode Q3 and a collector of the PNP diode D5 are connected in parallel to form a first output end of the rectifying and voltage stabilizing circuit And one end of the nonpolar capacitor C6 is connected to one end of the other secondary coil of the transformer, the other end of the nonpolar capacitor C6 is connected in parallel with one end of the resistor R8, the anode of the diode D4 and the base of the PNP triode Q4 through the resistor R6, the emitter of the PNP triode Q4 is connected in parallel with the cathode of the diode D4 and the cathode of the voltage regulator diode D6 to form a third output end of the rectification and voltage regulation circuit, and the other end of the other secondary coil of the transformer is connected in parallel with the other end of the resistor R8, the collector of the PNP triode Q4 and the anode of the voltage regulator diode D6 to form a fourth output end of the rectification and voltage regulation circuit.
Furthermore, the switch element unit comprises an N-channel field effect transistor Q5 and an N-channel field effect transistor Q6, a gate of the N-channel field effect transistor Q5 is connected with a first output end of the rectification voltage stabilizing circuit, a source of the N-channel field effect transistor Q5 is connected with a second output end of the rectification voltage stabilizing circuit and a drain of the N-channel field effect transistor Q6, a drain of the N-channel field effect transistor Q5 is connected with a power supply through a resistor R9, a gate of the N-channel field effect transistor Q6 is connected with a third output end of the rectification voltage stabilizing circuit, and a source of the N-channel field effect transistor Q6 is connected with a fourth output end of the rectification voltage stabilizing circuit and then grounded.
The beneficial effects of the utility model are that, this utility model compare in the limitation scheduling problem that the drive circuit structure is complicated, occupation space is big and use is kept apart to the tradition, have advantages such as simple structure, reliability height, occupation space are little, and realized the electric isolation protection, be applicable to the powerful application scene in.
The following description of the preferred embodiments for carrying out the present invention will be made in detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. The drawings are intended to depict only some embodiments of the invention, and not all embodiments of the invention are limited thereto.
Fig. 1 is a schematic diagram of a circuit interface of the pulse generating circuit in this embodiment.
Fig. 2 is a schematic diagram of a circuit interface of the middle power amplifier circuit of the present invention.
Fig. 3 is a schematic diagram of the circuit interface of the middle rectifying voltage stabilizing circuit and the switch unit of the present invention.
Detailed Description
In order to make the technical solution of the present invention, its purpose, technical solution and advantages become clearer, the drawings of the embodiments of the present invention will be combined hereinafter, and the technical solution of the embodiments of the present invention will be clearly and completely described. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
As shown in fig. 1 to fig. 3, the utility model provides a drive circuit with high integration level, good applicability, low cost and isolation protection, which comprises: the pulse drive control circuit, the transformer, the rectification voltage stabilizing circuit and the switching element unit; the pulse driving control circuit comprises a pulse generating circuit and a power amplifier circuit, wherein as shown in fig. 1, the pulse generating circuit is a single pulse generating circuit, and the pulse driving control circuit transmits a control pulse signal to a primary coil of the transformer through the power amplifier circuit; the input end of the rectification voltage stabilizing circuit is connected with a secondary coil of the transformer for rectifying and stabilizing alternating voltage, the transformer is a soft magnetic core three-winding transformer, and the input end of the switch element unit is connected with the output end of the rectification voltage stabilizing circuit.
As shown in fig. 2, the power amplifier circuit includes a resistor R3, a resistor R4, a polar capacitor C3, a diode D1, a diode D2, an NPN type transistor Q1, and a PNP type transistor Q2, wherein one end of the resistor R3, one end of the resistor R4, an anode of the diode D1, and an anode of the diode D2 are connected in parallel to form an input port of the power amplifier circuit, the input port is connected to the pulse output port of the single pulse generation circuit to receive the control pulse signal, the other end of the resistor R3 is connected to a cathode of the diode D1 and a base of the NPN type transistor Q1, the other end of the resistor R4 is connected to a cathode of the diode D2 and a base of the PNP type transistor Q2, an emitter of the NPN type transistor Q1 is connected to an emitter of the PNP type transistor Q2 to form an output end of the power amplifier circuit, a collector of the NPN type transistor Q1 is grounded through the polar capacitor C3, the collector of the PNP type triode Q2 is grounded.
As shown in fig. 3, the output terminal of the power amplifier circuit is connected to one end of the primary coil of the transformer through a non-polar capacitor C4 for filtering, the other end of the primary coil of the transformer is grounded, and the input terminal of the rectifying and voltage stabilizing circuit is connected to the secondary coil of the transformer, the rectifying and voltage stabilizing circuit comprises a resistor R5, a resistor R6, a resistor R7, a resistor R8, a non-polar capacitor C5, a non-polar capacitor C6, a PNP transistor Q3, a PNP transistor Q4, a diode D3, a diode D4, a zener diode D5 and a zener diode D6, one end of the resistor R5, one end of the non-polar capacitor C5 and one end of one secondary coil of the transformer are connected, the other end of the resistor R5, the other end of the non-polar capacitor C5, the anode of the diode D3, the base of the PNP transistor Q3 and one end of the resistor R7 are connected in parallel, the negative electrode of the diode D3, the emitter of the PNP triode Q3 and the negative electrode of the zener diode D5 are connected in parallel to form a first output terminal of the rectification voltage stabilizing circuit, the other end of a secondary coil of the transformer, the other end of the resistor R7, the collector of the PNP triode Q3 and the positive electrode of the zener diode D5 are connected in parallel to form a second output terminal of the rectification voltage stabilizing circuit, one end of the non-polar capacitor C6 is connected with one end of the other secondary coil of the transformer, the other end of the non-polar capacitor C6 is connected in parallel with one end of the resistor R8, the positive electrode of the diode D4 and the base of the PNP triode Q4 through the resistor R6, the emitter of the PNP triode Q4 is connected in parallel with the negative electrode of the diode D4 and the negative electrode of the zener diode D6 to form a third output terminal of the rectification voltage stabilizing circuit, the other end of the other secondary coil of the transformer is connected with the other end of the resistor R8, the collector of the PNP type triode Q4 and the anode of the voltage-stabilizing diode D6 in parallel to form a fourth output end of the rectification voltage-stabilizing circuit; the switch element unit comprises an N-channel field effect transistor Q5 and an N-channel field effect transistor Q6, wherein the grid electrode of the N-channel field effect transistor Q5 is connected with the first output end of the rectification voltage stabilizing circuit, the source electrode of the N-channel field effect transistor Q5 is connected with the second output end of the rectification voltage stabilizing circuit and the drain electrode of the N-channel field effect transistor Q6, the drain electrode of the N-channel field effect transistor Q5 is connected with a power supply through a resistor R9, the grid electrode of the N-channel field effect transistor Q6 is connected with the third output end of the rectification voltage stabilizing circuit, and the source electrode of the N-channel field effect transistor Q6 is connected with the fourth output end of the rectification voltage stabilizing circuit and then.
In this embodiment, the magnetic core of the transformer is a high-frequency soft magnetic core, when the pulse generating circuit outputs a high level, the transistor Q1 is turned on to provide a driving power for the fet, and when the pulse generating circuit outputs a low level, the transistor Q2 turns on the stored energy in the capacitor C3 to provide a reverse pulse, and the waveform of the secondary coil of the transformer is converted into a complementary pulse signal after passing through the rectifying and voltage-stabilizing circuit, thereby driving the fet to operate.
It should be noted that the embodiments of the present invention are only the preferred embodiments for implementing the present invention, and all the obvious modifications and changes belonging to the overall concept of the present invention should fall within the protection scope of the present invention.
Claims (7)
1. A driver circuit, comprising: the pulse drive control circuit, the transformer, the rectification voltage stabilizing circuit and the switching element unit; the pulse driving control circuit comprises a pulse generating circuit and a power amplifier circuit, and transmits a control pulse signal to a primary coil of the transformer through the power amplifier circuit; the input end of the rectification voltage stabilizing circuit is connected with the secondary coil of the transformer and used for rectifying and stabilizing alternating voltage, and the input end of the switch element unit is connected with the output end of the rectification voltage stabilizing circuit.
2. The driving circuit of claim 1, wherein the pulse generating circuit is a single pulse generating circuit.
3. The driving circuit as claimed in claim 2, wherein the power amplifying circuit includes a resistor R3, a resistor R4, a polar capacitor C3, a diode D1, a diode D2, an NPN transistor Q1 and a PNP transistor Q2, one end of the resistor R3, one end of the resistor R4, an anode of the diode D1 and an anode of the diode D2 are connected in parallel to form an input port of the power amplifying circuit, the input port is connected to the pulse output port of the single pulse generating circuit to receive the control pulse signal, the other end of the resistor R3 is connected to a cathode of the diode D1 and a base of the NPN transistor Q1, the other end of the resistor R4 is connected to a cathode of the diode D2 and a base of the PNP transistor Q2, an emitter of the NPN transistor Q1 is connected to an emitter of the PNP transistor Q2 to form an output terminal of the power amplifying circuit, the collector of the NPN type triode Q1 is grounded after passing through the polar capacitor C3, and the collector of the PNP type triode Q2 is grounded.
4. The drive circuit of claim 3, wherein the transformer is a soft magnetic core three winding transformer.
5. The driving circuit of claim 3, wherein the output terminal of the power amplifier circuit is connected to one end of the primary winding of the transformer through a non-polar capacitor C4 for filtering, and the other end of the primary winding of the transformer is grounded.
6. The driving circuit as claimed in claim 1, wherein the rectifying and voltage stabilizing circuit comprises a resistor R5, a resistor R6, a resistor R7, a resistor R8, a non-polar capacitor C5, a non-polar capacitor C6, a PNP transistor Q3, a PNP transistor Q4, a diode D3, a diode D4, a zener diode D5 and a zener diode D6, one end of the resistor R5, one end of the non-polar capacitor C5 and one end of a secondary coil of the transformer are connected in parallel, the other end of the resistor R5, the other end of the non-polar capacitor C5, the anode of the diode D3, the base of the PNP transistor Q3 and one end of the resistor R7 are connected in parallel, the cathode of the diode D3, the emitter of the PNP transistor Q3 and the cathode of the zener diode D5 are connected in parallel to form a first output terminal of the rectifying and the other end of the secondary coil of the transformer is connected in parallel to form a first output terminal of the rectifying and the rectifying, The other end of the resistor R7, the collector of the PNP type triode Q3 and the anode of the voltage stabilizing diode D5 are connected in parallel to form a second output end of the rectification voltage stabilizing circuit, one end of the non-polar capacitor C6 is connected to one end of the other secondary winding of the transformer, the other end of the nonpolar capacitor C6 is connected in parallel with one end of the resistor R8, the anode of the diode D4 and the base of the PNP type triode Q4 through the resistor R6, the emitter of the PNP type triode Q4 is connected in parallel with the cathode of the diode D4 and the cathode of the voltage stabilizing diode D6 to form a third output end of the rectifying and voltage stabilizing circuit, the other end of the other secondary coil of the transformer is connected in parallel with the other end of the resistor R8, the collector of the PNP type triode Q4 and the anode of the voltage stabilizing diode D6 to form a fourth output end of the rectification voltage stabilizing circuit.
7. The driving circuit according to claim 6, wherein the switching element unit comprises an N-channel fet Q5 and an N-channel fet Q6, a gate of the N-channel fet Q5 is connected to the first output terminal of the rectifying and voltage stabilizing circuit, a source of the N-channel fet Q5 is connected to the second output terminal of the rectifying and voltage stabilizing circuit and a drain of the N-channel fet Q6, a drain of the N-channel fet Q5 is connected to a power supply via a resistor R9, a gate of the N-channel fet Q6 is connected to the third output terminal of the rectifying and voltage stabilizing circuit, and a source of the N-channel fet Q6 is connected to the fourth output terminal of the rectifying and voltage stabilizing circuit and then grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922157487.5U CN210640870U (en) | 2019-12-05 | 2019-12-05 | Driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922157487.5U CN210640870U (en) | 2019-12-05 | 2019-12-05 | Driving circuit |
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| Publication Number | Publication Date |
|---|---|
| CN210640870U true CN210640870U (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922157487.5U Expired - Fee Related CN210640870U (en) | 2019-12-05 | 2019-12-05 | Driving circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332694A (en) * | 2020-10-27 | 2021-02-05 | 西安工程大学 | Piezoelectric ceramic drive circuit |
| CN117459005A (en) * | 2023-11-08 | 2024-01-26 | 成都航空职业技术学院 | Self-adaptive negative feedforward control circuit based on high-power signal linearity |
-
2019
- 2019-12-05 CN CN201922157487.5U patent/CN210640870U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332694A (en) * | 2020-10-27 | 2021-02-05 | 西安工程大学 | Piezoelectric ceramic drive circuit |
| CN117459005A (en) * | 2023-11-08 | 2024-01-26 | 成都航空职业技术学院 | Self-adaptive negative feedforward control circuit based on high-power signal linearity |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200529 Termination date: 20211205 |