CN112737361A - Direct-current switching power supply with inversion fault protection function - Google Patents
Direct-current switching power supply with inversion fault protection function Download PDFInfo
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- CN112737361A CN112737361A CN202011619150.2A CN202011619150A CN112737361A CN 112737361 A CN112737361 A CN 112737361A CN 202011619150 A CN202011619150 A CN 202011619150A CN 112737361 A CN112737361 A CN 112737361A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
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- Inverter Devices (AREA)
Abstract
The invention discloses a DC switch power supply with inversion fault protection function, comprising: the circuit comprises a rectification module, a first resistor R1, a second resistor R2, a thyristor V1, a capacitor C1, an inversion module, a sampling module, a driving module, a high-frequency transformer, a rectification filtering module and a controller; the positive electrode output of the rectifying module is connected with one end of a first resistor R1 and used for rectifying the input alternating current into direct current and outputting the direct current to a first resistor R1; the anode of the thyristor V1 is connected with one end of the first resistor R1, the cathode of the thyristor V1 is connected with the other end of the first resistor R1, and the thyristor V1 is used for controlling whether the first resistor R1 acts on a circuit; a comprehensive method of detection, voltage and current monitoring and redundancy switching of a power switch device is adopted to solve the problem that a direct-current switch power supply lacks a protection function for an inversion fault.
Description
Technical Field
The invention relates to the field of direct-current switching power supplies, in particular to a direct-current switching power supply with an inversion fault protection function.
Background
Dc switching power supplies are almost all electronic devices widely used in industrial fields, household appliances, and the like.
The inverter circuit works on the principle that direct-current voltage is converted into alternating-current voltage with required frequency, and single-phase or three-phase alternating-current voltage can be obtained at three phases of an output end by periodically controlling the on and off of the upper bridge arm power switching device and the lower bridge arm power switching device. The traditional inverter circuit (inverter) works on the principle that the power switching devices are controlled to be switched on and switched off through software, but the method has the defect that software faults are easy to occur, and the power switching devices are caused to be directly connected to explode. The prior art lacks the protection function to the contravariant trouble.
The invention provides a direct-current switching power supply which can detect a power switching device in inversion and has protection starting and redundancy switching after a fault.
Disclosure of Invention
The invention aims to provide a direct-current switching power supply with an inversion fault protection function, which adopts a comprehensive method of detection, voltage and current monitoring and redundancy switching of a power switching device to solve the problem that the direct-current switching power supply in the prior art lacks the protection function on the inversion fault.
The invention provides a DC switch power supply with inversion fault protection function, comprising: the circuit comprises a rectification module, a first resistor R1, a second resistor R2, a thyristor V1, a capacitor C1, an inversion module, a sampling module, a driving module, a high-frequency transformer, a rectification filtering module and a controller;
the positive electrode output of the rectifying module is connected with one end of the first resistor R1 and is used for rectifying the input alternating current into direct current and outputting the direct current to the first resistor R1;
the anode of the thyristor V1 is connected with one end of the first resistor R1, the cathode of the thyristor V1 is connected with the other end of the first resistor R1, and the thyristor V1 is used for controlling whether the first resistor R1 acts on a circuit;
one end of the first resistor R2 is connected with the gate of the thyristor V1, and the other end of the first resistor R2 is connected with the high-frequency transformer; the first resistor R2 is used for limiting the current for controlling the gate of the thyristor V1;
the positive electrode of the capacitor C1 is connected with the other end of the first resistor R1, the negative electrode of the capacitor C1 is connected with the negative electrode output of the rectifying module, the capacitor C1 is used for storing electric energy, and a buffer circuit is arranged;
the inversion module is connected with the other end of the first resistor R1, and is also connected with the sampling module, the driving module and the high-frequency transformer respectively, and is used for inverting the direct current into alternating current;
the rectification filtering module is connected with the high-frequency transformer and used for rectifying and filtering alternating current output by the secondary side of the high-frequency transformer into standard direct current;
the controller is respectively connected with the sampling module and the driving module and is used for controlling the driving module according to sampling signals of voltage and current so as to complete an inversion function.
Optionally, the inverter module includes a selection circuit, a full-bridge circuit, and a standby full-bridge circuit; the selection circuit is respectively connected with the full-bridge circuit and the standby full-bridge circuit and used for switching the full-bridge circuit to the standby full-bridge circuit.
Optionally, the sampling module includes sampling a voltage of a positive electrode on the capacitor C1, and d sampling a current flowing through the inverting module.
Optionally, the high-frequency transformer includes a primary winding, an auxiliary winding, and a secondary winding.
Optionally, the auxiliary coil of the high-frequency transformer is used to control the conduction of the thyristor V1, and the specific conduction control method is as follows:
when the controller detects that the voltage of the positive electrode on the capacitor C1 is greater than the starting voltage, the inverter enters an inversion working state, the primary coil of the high-frequency transformer passes through the alternating current, so that the auxiliary coil of the high-frequency transformer is electrified, and the thyristor V1 is switched on.
Optionally, the first resistor R1 is used for voltage buffering when the dc switch current is powered on; when the normal inversion working state is entered, the thyristor V1 is conducted, and the first resistor R1 is not connected to the system any more.
Optionally, when the dc switching power supply is powered on, the specific detection and switching method of the inverter module is as follows:
controlling the selection circuit to select to access the full-bridge circuit, wherein the full-bridge circuit has no driving signal, if the current sampled by the current is greater than zero, the full-bridge circuit has a short-circuit fault, otherwise, the full-bridge circuit is normal;
when the full-bridge circuit fails, controlling the selection circuit to select to access the standby full-bridge circuit, wherein the standby full-bridge circuit has no driving signal, if the current sampled by the current is greater than zero, the standby full-bridge circuit has a short-circuit fault, otherwise, the standby full-bridge circuit is normal;
if the full bridge circuit and the standby full bridge circuit are both in fault, the selection circuit does not select any circuit.
Optionally, when the dc switching power supply is in a working state, the specific detection and switching method of the inverter module is as follows:
controlling the selection circuit to select to access the full-bridge circuit, wherein the full-bridge circuit is in a working state, if the current sampled by the current is greater than a critical value, the full-bridge circuit has a short-circuit fault, otherwise, the full-bridge circuit is normal;
when the full-bridge circuit fails, controlling the selection circuit to select to access the standby full-bridge circuit, wherein the standby full-bridge circuit is in a working state, if the current sampled by the current is greater than a critical value, the standby full-bridge circuit has a short-circuit fault, otherwise, the standby full-bridge circuit is normal;
if the full bridge circuit and the standby full bridge circuit are both in fault, the selection circuit does not select any circuit.
Optionally, the selection circuit selects to switch in the full bridge circuit or selects to switch in the standby full bridge circuit or not switches in any circuit.
Optionally, the critical value is 2 times of the rated input current of the dc switching power supply.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adds the selection circuit and two groups of inverter circuits in the inverter module, and can simultaneously deal with one group of inverter faults and two groups of inverter faults, so that the inverter fault protection of the direct current switch power supply has the characteristic of redundancy and can also quickly discharge the faults.
2. The invention adopts the detection of two groups of inverter circuits when the direct current switch power supply is electrified and operated, and is different from the traditional electrification detection.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
fig. 1 shows a circuit block diagram of a dc switching power supply with an inverter fault protection function according to the present invention;
fig. 2 shows a circuit block diagram of an inverter module in a dc switching power supply with an inverter fault protection function according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a direct current switch power supply with an inversion fault protection function, a circuit block diagram of which is shown in figure 1 and comprises: the circuit comprises a rectifying module 51, a first resistor R1, a second resistor R2, a thyristor V1, a capacitor C1, an inverter module 52, a sampling module 53, a driving module 54, a high-frequency transformer 56, a rectifying and filtering module 57 and a controller 55;
the positive electrode output of the rectifying module 51 is connected with one end of a first resistor R1, and is used for rectifying the input alternating current into direct current and outputting the direct current to a first resistor R1;
the anode of the thyristor V1 is connected with one end of the first resistor R1, the cathode of the thyristor V1 is connected with the other end of the first resistor R1, and the thyristor V1 is used for controlling whether the first resistor R1 acts on a circuit;
one end of the first resistor R2 is connected with the gate of the thyristor V1, and the other end of the first resistor R2 is connected with the high-frequency transformer 56; the first resistor R2 is used for limiting the current of the gate of the control thyristor V1;
the positive electrode of the capacitor C1 is connected with the other end of the first resistor R1, the negative electrode of the capacitor C1 is connected with the negative electrode output of the rectifier module 51, the capacitor C1 is used for storing electric energy, and a buffer circuit is arranged;
the inversion module 52 is connected with the other end of the first resistor R1, and is also connected with the sampling module 53, the driving module 54 and the high-frequency transformer 56 respectively, and is used for inverting the direct current into alternating current;
the rectifying and filtering module 57 is connected with the high-frequency transformer 56 and used for rectifying and filtering alternating current output by the secondary side of the high-frequency transformer 56 into standard direct current;
the controller 55 is respectively connected to the sampling module 53 and the driving module 54, and is configured to control the driving module 54 according to the sampling signal of the voltage and the current to perform an inversion function.
Alternatively, a circuit block diagram of an inverter module in a dc switching power supply with an inverter fault protection function is shown in fig. 2, where the inverter module 52 includes a selection circuit 521, a full-bridge circuit 522, and a standby full-bridge circuit 532; the selection circuit is respectively connected with the full-bridge circuit and the standby full-bridge circuit and used for switching the full-bridge circuit to the standby full-bridge circuit.
Optionally, the sampling module 53 includes sampling the voltage on the positive side of the capacitor C1 and sampling the current flowing through the inverting module.
Alternatively, the high-frequency transformer 56 includes a primary winding L1, an auxiliary winding L2, and a secondary winding L3.
Optionally, the auxiliary coil L2 of the high-frequency transformer 56 is used to control the conduction of the thyristor V1, and the specific conduction control method is as follows:
when the controller detects that the voltage of the positive electrode on the capacitor C1 is greater than the starting voltage, the inverter enters an inversion working state, the primary coil L1 of the high-frequency transformer 55 is passed by alternating current, so that the auxiliary coil L2 of the high-frequency transformer 55 is electrified, and the thyristor V1 is switched on.
Optionally, the first resistor R1 is used for voltage buffering when the dc switch current is powered up; when the inverter enters a normal inversion working state, the thyristor V1 is conducted, and the first resistor R1 is not connected to the system any more.
Optionally, when the dc switching power supply is powered on, the specific detection and switching method of the inverter module 52 is as follows:
the selection circuit 521 is controlled to select to access the full-bridge circuit 522, at this time, the full-bridge circuit 522 has no driving signal, if the current sampled by the current is greater than zero, the full-bridge circuit 522 has a short-circuit fault, otherwise, the full-bridge circuit 522 is normal;
when the full-bridge circuit fails, the selection circuit 521 is controlled to select to access the standby full-bridge circuit 523, at this time, the standby full-bridge circuit 523 has no driving signal, if the current sampled by the current is greater than zero, the standby full-bridge circuit 523 has a short-circuit failure, otherwise, the standby full-bridge circuit 523 is normal;
if both the full-bridge circuit 522 and the standby full-bridge circuit 523 fail, the selection circuit 521 does not select any circuit.
Optionally, when the dc switching power supply is in an operating state, the specific detection and switching method of the inverter module 52 is as follows:
the selection circuit 521 is controlled to select to access the full-bridge circuit 522, at this time, the full-bridge circuit 522 is in a working state, if the current sampled by the current is greater than a critical value, the full-bridge circuit 522 has a short-circuit fault, otherwise, the full-bridge circuit 522 is normal;
when the full-bridge circuit 522 has a fault, the selection circuit 521 is controlled to select to access the standby full-bridge circuit 523, the standby full-bridge circuit is in a working state, if the current sampled by the current is greater than a critical value, the standby full-bridge circuit 523 has a short-circuit fault, otherwise, the standby full-bridge circuit 523 is normal;
if both the full-bridge circuit 522 and the standby full-bridge circuit 523 fail, the selection circuit 521 does not select any circuit.
Optionally, the selection circuit 521 selects to access the full-bridge circuit 522 or selects to access the standby full-bridge circuit 523 or not to access any circuit.
Optionally, the critical value is 2 times of the rated input current of the dc switching power supply.
The invention relates to a direct current switch power supply with an inversion fault protection function, which comprises the following specific working processes:
the alternating current is input into a rectifying module 51 to obtain direct current, and stable voltage is obtained through buffering of a resistor R1 and a capacitor C1; the controller 55 detects the voltage on the capacitor C1 and the state of the circuit in the inverter module 52 through the sampling module 53; when the voltage of the capacitor C1 meets the turn-on requirement and the circuit of the inverter module 52 is normal, the controller 55 sends a signal to the driving module 54, so that the inverter module 52 operates; further, the primary coil L1 of the high-frequency transformer 56 is powered, the auxiliary coil L2 is powered, and the thyristor V1 is driven to be opened through the current limiting of the resistor R2, so that the resistor R1 is not connected to the system any more; similarly, the secondary winding L3 is powered on, and is processed by the rectifying and filtering module 57 to obtain a stable dc output.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details shown and described herein without departing from the general concept defined by the claims and their equivalents.
Claims (10)
1. A DC switching power supply with an inversion fault protection function is characterized by comprising: the circuit comprises a rectification module, a first resistor R1, a second resistor R2, a thyristor V1, a capacitor C1, an inversion module, a sampling module, a driving module, a high-frequency transformer, a rectification filtering module and a controller;
the positive electrode output of the rectifying module is connected with one end of the first resistor R1 and is used for rectifying the input alternating current into direct current and outputting the direct current to the first resistor R1;
the anode of the thyristor V1 is connected with one end of the first resistor R1, the cathode of the thyristor V1 is connected with the other end of the first resistor R1, and the thyristor V1 is used for controlling whether the first resistor R1 acts on a circuit;
one end of the first resistor R2 is connected with the gate of the thyristor V1, and the other end of the first resistor R2 is connected with the high-frequency transformer; the first resistor R2 is used for limiting the current for controlling the gate of the thyristor V1;
the positive electrode of the capacitor C1 is connected with the other end of the first resistor R1, the negative electrode of the capacitor C1 is connected with the negative electrode output of the rectifying module, the capacitor C1 is used for storing electric energy, and a buffer circuit is arranged;
the inversion module is connected with the other end of the first resistor R1, and is also connected with the sampling module, the driving module and the high-frequency transformer respectively, and is used for inverting the direct current into alternating current;
the rectification filtering module is connected with the high-frequency transformer and used for rectifying and filtering alternating current output by the secondary side of the high-frequency transformer into standard direct current;
the controller is respectively connected with the sampling module and the driving module and is used for controlling the driving module according to sampling signals of voltage and current so as to complete an inversion function.
2. The dc switching power supply with the inverter fault protection function according to claim 1, wherein the inverter module includes a selection circuit, a full bridge circuit, a standby full bridge circuit; the selection circuit is respectively connected with the full-bridge circuit and the standby full-bridge circuit and used for switching the full-bridge circuit to the standby full-bridge circuit.
3. The dc switching power supply with inverter fault protection as claimed in claim 1, wherein said sampling module comprises sampling the voltage of the positive pole on said capacitor C1, and d sampling the current flowing through said inverter module.
4. The dc switching power supply with an inverter fault protection function according to claim 1, wherein the high-frequency transformer includes a primary winding, an auxiliary winding, and a secondary winding.
5. The dc switching power supply with the inverter fault protection function according to claim 1, wherein an auxiliary winding of the high-frequency transformer is used for controlling conduction of the thyristor V1, and the specific conduction control method is as follows:
when the controller detects that the voltage of the positive electrode on the capacitor C1 is greater than the starting voltage, the inverter enters an inversion working state, the primary coil of the high-frequency transformer passes through the alternating current, so that the auxiliary coil of the high-frequency transformer is electrified, and the thyristor V1 is switched on.
6. The dc switching power supply with the inverter fault protection function according to claim 1, wherein the first resistor R1 is used for voltage buffering when the dc switching current is powered on; when the normal inversion working state is entered, the thyristor V1 is conducted, and the first resistor R1 is not connected to the system any more.
7. The dc switching power supply with the inverter fault protection function according to claim 1, wherein when the dc switching power supply is powered on, the specific detection and switching method of the inverter module is as follows:
controlling the selection circuit to select to access the full-bridge circuit, wherein the full-bridge circuit has no driving signal, if the current sampled by the current is greater than zero, the full-bridge circuit has a short-circuit fault, otherwise, the full-bridge circuit is normal;
when the full-bridge circuit fails, controlling the selection circuit to select to access the standby full-bridge circuit, wherein the standby full-bridge circuit has no driving signal, if the current sampled by the current is greater than zero, the standby full-bridge circuit has a short-circuit fault, otherwise, the standby full-bridge circuit is normal;
if the full bridge circuit and the standby full bridge circuit are both in fault, the selection circuit does not select any circuit.
8. The dc switching power supply with the inverter fault protection function according to claim 7, wherein when the dc switching power supply is in an operating state, the specific detection and switching method of the inverter module is as follows:
controlling the selection circuit to select to access the full-bridge circuit, wherein the full-bridge circuit is in a working state, if the current sampled by the current is greater than a critical value, the full-bridge circuit has a short-circuit fault, otherwise, the full-bridge circuit is normal;
when the full-bridge circuit fails, controlling the selection circuit to select to access the standby full-bridge circuit, wherein the standby full-bridge circuit is in a working state, if the current sampled by the current is greater than a critical value, the standby full-bridge circuit has a short-circuit fault, otherwise, the standby full-bridge circuit is normal;
if the full bridge circuit and the standby full bridge circuit are both in fault, the selection circuit does not select any circuit.
9. The dc switching power supply with an inverter fault protection function according to claim 8, wherein the selection circuit selects to switch in the full bridge circuit or selects to switch in the standby full bridge circuit or does not switch in any circuit.
10. The dc switching power supply with inverter fault protection as set forth in claim 9, wherein the critical value is 2 times of the rated input current of the dc switching power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011619150.2A CN112737361A (en) | 2020-12-31 | 2020-12-31 | Direct-current switching power supply with inversion fault protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011619150.2A CN112737361A (en) | 2020-12-31 | 2020-12-31 | Direct-current switching power supply with inversion fault protection function |
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| Publication Number | Publication Date |
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| CN112737361A true CN112737361A (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011619150.2A Pending CN112737361A (en) | 2020-12-31 | 2020-12-31 | Direct-current switching power supply with inversion fault protection function |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6400584B1 (en) * | 2001-03-23 | 2002-06-04 | Koninklijke Philips Electronics N.V. | Two stage switching power supply for connecting an AC power source to a load |
| US20040228153A1 (en) * | 2003-05-14 | 2004-11-18 | Cao Xiao Hong | Soft-switching techniques for power inverter legs |
| CN102355155A (en) * | 2011-10-13 | 2012-02-15 | 无锡威华电焊机制造有限公司 | Welding inverter for steel truss |
| CN203645600U (en) * | 2014-01-09 | 2014-06-11 | 云南品森科技有限公司 | Wind and solar complementation power supply system used for high mountain monitoring station |
| CN203674779U (en) * | 2014-01-21 | 2014-06-25 | 青岛经济技术开发区创统科技发展有限公司 | Turbine generator static starting power supply |
-
2020
- 2020-12-31 CN CN202011619150.2A patent/CN112737361A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6400584B1 (en) * | 2001-03-23 | 2002-06-04 | Koninklijke Philips Electronics N.V. | Two stage switching power supply for connecting an AC power source to a load |
| US20040228153A1 (en) * | 2003-05-14 | 2004-11-18 | Cao Xiao Hong | Soft-switching techniques for power inverter legs |
| CN102355155A (en) * | 2011-10-13 | 2012-02-15 | 无锡威华电焊机制造有限公司 | Welding inverter for steel truss |
| CN203645600U (en) * | 2014-01-09 | 2014-06-11 | 云南品森科技有限公司 | Wind and solar complementation power supply system used for high mountain monitoring station |
| CN203674779U (en) * | 2014-01-21 | 2014-06-25 | 青岛经济技术开发区创统科技发展有限公司 | Turbine generator static starting power supply |
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Application publication date: 20210430 |
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