CN110460020B - Output protection device of high-power mobile power supply - Google Patents
Output protection device of high-power mobile power supply Download PDFInfo
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- CN110460020B CN110460020B CN201910830032.7A CN201910830032A CN110460020B CN 110460020 B CN110460020 B CN 110460020B CN 201910830032 A CN201910830032 A CN 201910830032A CN 110460020 B CN110460020 B CN 110460020B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the output circuit, e.g. short circuit
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Abstract
The invention discloses an output protection device of a high-power mobile power supply, wherein the output protection device comprises: the device comprises an inverter, a protection circuit, a filter inductor, a filter current sensor, a filter capacitor, a power output interface and a central controller; the input end of the inverter is connected with the output end of the high-power mobile power supply, and the output end of the inverter is connected with the input end of the protection circuit; the input end of the filter inductor is connected with the output end of the protection circuit, and the output end of the filter inductor is respectively connected with one end of the filter capacitor phase and one phase line of the power output interface; the other end of the filter capacitor is connected with the other phase line of the power output interface, and the other end of the filter capacitor is grounded; the filter current sensor is arranged between the filter inductor and the filter capacitor; the central controller is respectively connected with the inverter, the filtering current sensor and the filtering capacitor. In the embodiment of the invention, stable alternating voltage can be output to supply power to the electronic product, so that the damage to the electronic product is reduced.
Description
Technical Field
The invention relates to the technical field of power supply of mobile power supplies, in particular to an output protection device of a high-power mobile power supply.
Background
In the vehicle-mounted device or in a remote mountain area (there may be a place where power is frequently cut off or not powered on), the dc power supply is used for supplying power, which may cause that some electric devices cannot normally perform corresponding operations or the operation effect does not reach the expected effect.
In the prior art, an inverter is directly arranged at the output end of a high-power mobile power supply, direct current output by the direct current power supply is inverted into alternating current, and the alternating current is directly output to power-consuming electronic equipment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an output protection device of a high-power mobile power supply, which can output stable alternating voltage, supply power to electronic products and reduce the damage to the electronic products.
In order to solve the above technical problem, an embodiment of the present invention provides an output protection device for a high-power mobile power supply, where the output protection device includes: the device comprises an inverter, a protection circuit, a filter inductor, a filter current sensor, a filter capacitor, a power output interface and a central controller; wherein, the first and the second end of the pipe are connected with each other,
the input end of the inverter is connected with the output end of the high-power mobile power supply, and the output end of the inverter is connected with the input end of the protection circuit; the input end of the filter inductor is connected with the output end of the protection circuit, and the output end of the filter inductor is respectively connected with one end of the filter capacitor phase and one phase line of the power output interface; the other end of the filter capacitor is connected with the other phase line of the power output interface, and the other end of the filter capacitor is grounded; the filter current sensor is arranged between the filter inductor and the filter capacitor; the central controller is respectively connected with the inverter, the filtering current sensor and the filtering capacitor.
Optionally, the central controller generates a control instruction for controlling the inverter according to the current value of the filter current sensor and the voltage value of the filter capacitor, and sends the control instruction to the inverter for control.
Optionally, the protection circuit includes: the protection circuit comprises an enable control circuit, an overheating protection circuit, an overcurrent protection circuit and an overvoltage or undervoltage protection circuit; wherein the content of the first and second substances,
the enabling control circuit, the overheating protection circuit, the overcurrent protection circuit and the overvoltage or undervoltage protection circuit are respectively connected with the inverter; the enabling control circuit is respectively connected with the overheating protection circuit and the overcurrent protection circuit; the input end of the overvoltage or undervoltage protection circuit is respectively connected with the overheat protection circuit and the overcurrent protection circuit, and the output end of the overvoltage or undervoltage protection circuit is connected with the filter inductor.
Optionally, the enable control circuit is composed of a three-level CMOS inverter; the enabling control circuit is used for generating a first enabling signal and a second enabling signal; the overheat protection circuit is controlled through a first enable signal, and the overcurrent protection circuit is controlled through a second enable signal.
Optionally, the overvoltage or undervoltage protection circuit includes a voltage transformation circuit, a filter circuit, a voltage stabilization output circuit, a voltage sampling circuit, and a control circuit;
the filter circuit, the voltage transformation circuit and the voltage stabilization output circuit are connected in series; one end of the voltage sampling circuit is connected with the filter circuit, and the other end of the voltage sampling circuit is connected with the control circuit; the control circuit is respectively connected with the voltage stabilizing output circuit and the voltage transformation circuit.
Optionally, the control circuit is configured to receive the sampling voltage sampled by the voltage sampling circuit and the output voltage of the voltage stabilization output circuit, and generate a control voltage transformation instruction for controlling the voltage transformation circuit to transform voltage;
and sending the voltage transformation control instruction to the voltage transformation circuit to complete voltage transformation control of the voltage transformation circuit.
In the embodiment, the output voltage of the high-power mobile power supply is converted into alternating current through the inverter, stable output voltage is output through the protection circuit, and the inversion output power of the inverter is controlled through the central controller; therefore, the high-power mobile power supply can output stable alternating voltage to supply power to the corresponding electronic equipment, the electronic equipment is protected from being affected by unstable power supply voltage, damage to the electronic equipment is reduced, and the electronic equipment has longer service life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural composition diagram of an output protection device of a high-power mobile power supply in an embodiment of the invention;
FIG. 2 is a schematic diagram of a protection circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an overvoltage or undervoltage protection circuit according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of an output protection device of a high-power mobile power supply in an embodiment of the present invention.
As shown in fig. 1, an embodiment of the present invention provides an output protection device for a high-power mobile power supply, where the output protection device includes: the device comprises an inverter, a protection circuit, a filter inductor, a filter current sensor, a filter capacitor, a power output interface and a central controller; the input end of the inverter is connected with the output end of the high-power mobile power supply, and the output end of the inverter is connected with the input end of the protection circuit; the input end of the filter inductor is connected with the output end of the protection circuit, and the output end of the filter inductor is respectively connected with one end of the filter capacitor phase and one phase line of the power output interface; the other end of the filter capacitor is connected with the other phase line of the power output interface, and the other end of the filter capacitor is grounded; the filter current sensor is arranged between the filter inductor and the filter capacitor; the central controller is respectively connected with the inverter, the filtering current sensor and the filtering capacitor.
In the specific implementation process of the invention, the inverter converts the direct current output by the high-power mobile power supply into the alternating current, in certain characteristic scenes, certain electronic products can achieve the best use efficiency by using the alternating current, in the field or an automobile, or in a remote mountain area (an area with frequent power failure), only the storage battery can be used for supplying power, but the existing storage battery can only supply the direct current and cannot directly supply the alternating current when supplying power, at this time, the direct current can be inverted into the alternating current through the inverter, the inverted alternating current firstly passes through the protection circuit and then is output to the power output interface through the filter circuit and the filter capacitor, and the electronic equipment can be connected to the power output interface for use; the current signal is acquired by arranging the filter current sensor between the filter capacitor and the filter inductor, the voltage signal is acquired by the filter capacitor, the current signal and the voltage signal are transmitted to the central controller, and the central controller generates a control instruction for controlling the inverter according to the corresponding current signal and the corresponding voltage signal, so that the inverter is controlled, and the circuit is ensured to output stable alternating voltage.
In the specific implementation process of the invention, the central controller generates a control command for controlling the inverter according to the current value of the filter current sensor and the voltage value of the filter capacitor, and sends the control command to the inverter for control.
Specifically, the central controller respectively acquires corresponding current values and voltage values through a filter current sensor and a filter capacitor; generating a control instruction for controlling the inverter according to the current value and the voltage value, and sending the control instruction to the inverter to realize the control of the inverter; the central controller generates a control command according to the comparison result to realize the control of the inverter, and the power of the inversion output of the inverter is controlled not to be larger than the maximum power allowed to be output by the output protection device.
Referring to fig. 2, fig. 2 is a schematic structural composition diagram of a protection circuit according to an embodiment of the invention.
As shown in fig. 2, the protection circuit includes: the protection circuit comprises an enable control circuit, an overheating protection circuit, an overcurrent protection circuit and an overvoltage or undervoltage protection circuit; the enabling control circuit, the overheating protection circuit, the overcurrent protection circuit and the overvoltage or undervoltage protection circuit are respectively connected with the inverter; the enabling control circuit is respectively connected with the overheating protection circuit and the overcurrent protection circuit; the input end of the overvoltage or undervoltage protection circuit is respectively connected with the overheat protection circuit and the overcurrent protection circuit, and the output end of the overvoltage or undervoltage protection circuit is connected with the filter inductor.
Specifically, the enable control circuit generates a corresponding enable signal to correspondingly control the overheat protection circuit and the overcurrent protection circuit which are connected with the enable control circuit, for example, a first enable signal is generated to control the overheat protection circuit, and a second enable signal is generated to control the overcurrent protection circuit; when the overheat protection circuit detects that the circuit structure in the wide-voltage power supply protection device is overheated, a first enabling signal is sent out to control the overheat protection circuit to generate a circuit cut-off channel, a safe signal of the protection circuit is sent to a control circuit in the overvoltage or undervoltage protection circuit, and the control circuit cuts off the channel of the wide-voltage power supply protection device through a trigger in the control circuit to protect the circuit in the wide-voltage power supply protection device; if the overcurrent protection circuit detects that the circuit in the wide-voltage power supply protection device has an overcurrent condition, the enabling control circuit sends a second enabling signal to the overcurrent protection circuit to control the overcurrent protection circuit to generate a signal for cutting off the safety of the circuit protection circuit to the control circuit in the overvoltage or undervoltage protection circuit, and the control circuit cuts off the passage of the wide-voltage power supply protection device through a trigger in the control circuit, so that the circuit in the wide-voltage power supply protection device is protected.
In the specific implementation process of the invention, the enabling control circuit consists of a three-level CMOS inverter; the enabling control circuit is used for generating a first enabling signal and a second enabling signal; the overheat protection circuit is controlled through a first enable signal, and the overcurrent protection circuit is controlled through a second enable signal.
Specifically, the three-stage CMOS inverter is a MOS transistor with hysteresis to prevent various problems such as circuit oscillation due to instability of the generated first and second enable signals.
Referring to fig. 3, fig. 3 is a schematic structural composition diagram of an over-voltage or under-voltage protection circuit according to an embodiment of the invention.
As shown in fig. 3, the overvoltage or undervoltage protection circuit includes a voltage transformation circuit, a filter circuit, a voltage stabilization output circuit, a voltage sampling circuit, and a control circuit; the filter circuit, the voltage transformation circuit and the voltage stabilization output circuit are connected in series; one end of the voltage sampling circuit is connected with the filter circuit, and the other end of the voltage sampling circuit is connected with the control circuit; the control circuit is respectively connected with the voltage stabilizing output circuit and the voltage transformation circuit.
Specifically, the overvoltage or undervoltage protection circuit is realized by a plurality of circuits such as a voltage circuit, a filter circuit, a voltage stabilization output circuit, a voltage sampling circuit, a control circuit and the like, and the output voltage and current are firstly filtered by the filter circuit, then transformed by the transformation circuit, finally stabilized by the voltage stabilization output circuit and then output; the output voltage is stable, the alternating current frequency is stable, and unnecessary damage caused by unstable voltage and unstable frequency is avoided when the electronic equipment uses the output electric energy; the voltage sampling current is used for collecting the voltage of the filter circuit and feeding back the voltage to the control circuit, the voltage stabilizing output circuit feeds back the output voltage to the control circuit, the control circuit controls the voltage transformation circuit to work according to the fed-back voltage, stable voltage is provided for the circuit, and the condition that overvoltage or undervoltage does not exist in the voltage output by the circuit is ensured.
In a specific implementation process of the invention, the control circuit is used for receiving the sampling voltage sampled by the voltage sampling circuit and the output voltage of the voltage stabilizing output circuit to generate a control voltage transformation instruction for controlling the voltage transformation circuit to carry out voltage transformation; and sending the voltage transformation control instruction to the voltage transformation circuit to complete voltage transformation control of the voltage transformation circuit.
Specifically, the control circuit generates a control voltage transformation command for controlling the voltage transformation circuit according to the sampling voltage sampled by the voltage sampling circuit and the output voltage of the voltage stabilization output circuit; and then the control voltage transformation instruction is sent to the voltage transformation circuit to realize the voltage transformation control of the voltage transformation circuit.
In the embodiment, the output voltage of the high-power mobile power supply is converted into alternating current through the inverter, stable output voltage is output through the protection circuit, and the inversion output power of the inverter is controlled through the central controller; therefore, the high-power mobile power supply can output stable alternating voltage to supply power to the corresponding electronic equipment, the electronic equipment is protected from being affected by unstable power supply voltage, damage to the electronic equipment is reduced, and the electronic equipment has longer service life.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.
In addition, the above detailed description is given to the output protection device of the high-power mobile power supply provided by the embodiment of the present invention, and a specific example should be adopted herein to explain the principle and the implementation manner of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (2)
1. An output protection device of a high-power mobile power supply is characterized by comprising: the device comprises an inverter, a protection circuit, a filter inductor, a filter current sensor, a filter capacitor, a power output interface and a central controller; wherein the content of the first and second substances,
the input end of the inverter is connected with the output end of the high-power mobile power supply, and the output end of the inverter is connected with the input end of the protection circuit; the input end of the filter inductor is connected with the output end of the protection circuit, and the output end of the filter inductor is connected with the input end of the filter current sensor; the output end of the filtering current sensor is respectively connected with one end of the filtering capacitor and one phase line of the power output interface; the other end of the filter capacitor is connected with the other phase line of the power output interface, and the other end of the filter capacitor is grounded; the central controller is respectively connected with the inverter, the filtering current sensor and the filtering capacitor;
the central controller respectively acquires corresponding current values and voltage values through the filtering current sensor and the filtering capacitor; generating a control instruction for controlling the inverter according to the current value and the voltage value, and sending the control instruction to the inverter to realize the control of the inverter; the central controller generates a control instruction according to the comparison result to realize the control of the inverter, and controls the power output by the inverter to be not greater than the maximum power allowed to be output by the output protection device;
the protection circuit includes: the protection circuit comprises an enable control circuit, an overheating protection circuit, an overcurrent protection circuit and an overvoltage or undervoltage protection circuit; wherein the content of the first and second substances,
the enabling control circuit, the overheating protection circuit, the overcurrent protection circuit and the overvoltage or undervoltage protection circuit are respectively connected with the inverter; the enabling control circuit is respectively connected with the overheating protection circuit and the overcurrent protection circuit; the input end of the overvoltage or undervoltage protection circuit is respectively connected with the overheat protection circuit and the overcurrent protection circuit, and the output end of the overvoltage or undervoltage protection circuit is connected with the filter inductor;
the enabling control circuit consists of a three-level CMOS inverter; the enabling control circuit is used for generating a first enabling signal and a second enabling signal; the overheating protection circuit is controlled through a first enabling signal, and the overcurrent protection circuit is controlled through a second enabling signal;
the overvoltage or undervoltage protection circuit comprises a voltage transformation circuit, a filter circuit, a voltage stabilization output circuit, a voltage sampling circuit and a control circuit; wherein the content of the first and second substances,
the filter circuit, the voltage transformation circuit and the voltage stabilization output circuit are connected in series; one end of the voltage sampling circuit is connected with the filter circuit, and the other end of the voltage sampling circuit is connected with the control circuit; the control circuit is respectively connected with the voltage stabilizing output circuit and the voltage transformation circuit.
2. The output protection device of claim 1, wherein the control circuit is configured to receive the sampling voltage sampled by the voltage sampling circuit and the output voltage of the regulated output circuit to generate a control transformation command for controlling the transformation circuit to transform;
and sending the voltage transformation control instruction to the voltage transformation circuit to complete voltage transformation control of the voltage transformation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910830032.7A CN110460020B (en) | 2019-09-02 | 2019-09-02 | Output protection device of high-power mobile power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910830032.7A CN110460020B (en) | 2019-09-02 | 2019-09-02 | Output protection device of high-power mobile power supply |
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| CN110460020A CN110460020A (en) | 2019-11-15 |
| CN110460020B true CN110460020B (en) | 2022-05-17 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891476A (en) * | 2011-07-20 | 2013-01-23 | 北京宝盒精英科技有限公司 | Communication standby lithium alternating-current power supply device, battery discharging protection system and method |
| CN207218551U (en) * | 2017-10-09 | 2018-04-10 | 武汉大学 | A kind of adjustable three-phase inverter |
| CN108923378A (en) * | 2018-08-01 | 2018-11-30 | 广州番禺巨大汽车音响设备有限公司 | A kind of Width funtion apparatus for protecting power supply for stereo set |
-
2019
- 2019-09-02 CN CN201910830032.7A patent/CN110460020B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891476A (en) * | 2011-07-20 | 2013-01-23 | 北京宝盒精英科技有限公司 | Communication standby lithium alternating-current power supply device, battery discharging protection system and method |
| CN207218551U (en) * | 2017-10-09 | 2018-04-10 | 武汉大学 | A kind of adjustable three-phase inverter |
| CN108923378A (en) * | 2018-08-01 | 2018-11-30 | 广州番禺巨大汽车音响设备有限公司 | A kind of Width funtion apparatus for protecting power supply for stereo set |
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| CN110460020A (en) | 2019-11-15 |
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