CN219477850U - Power supply conversion circuit of aviation case - Google Patents
Power supply conversion circuit of aviation case Download PDFInfo
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- CN219477850U CN219477850U CN202221842910.0U CN202221842910U CN219477850U CN 219477850 U CN219477850 U CN 219477850U CN 202221842910 U CN202221842910 U CN 202221842910U CN 219477850 U CN219477850 U CN 219477850U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model provides a power supply conversion circuit of an aviation case, which belongs to the technical field of aviation electrical appliances and comprises an AC-DC power supply module and an inversion module; the inversion module comprises a high-frequency boost circuit, a high-frequency SPWM inversion circuit and an EMI filter. The input end of the high-frequency boosting circuit is connected with the output end of the AC-DC power supply module; the input end of the high-frequency SPWM inverter circuit is connected with the output end of the high-frequency booster circuit; the input end of the EMI filter is connected with the output end of the high-frequency SPWM inverter circuit, and the output end is connected with load equipment. The inversion module of the aviation power supply conversion circuit can stably boost the voltage of an AC115V (400 Hz) at the input end to DC400V through the high-frequency boost circuit, then the voltage is inverted to AC220V/50HZ through the high-frequency inversion conversion circuit, and finally the voltage is output to load equipment through an EMI filter capacitor.
Description
Technical Field
The utility model belongs to the technical field of aviation electrical appliances, and particularly relates to a power supply conversion circuit of an aviation case.
Background
The aviation power supply converter is also called an alternating current converter, and because of different power environments of countries and regions of the world, different voltages exist in the countries, and the voltage application ranges of electric appliances in the countries are also different. There are commonly two voltages, 220V and 110V.
At present, a 115V and 400HZ constant-speed constant-frequency three-phase alternating current power supply system is widely adopted as an airport alternating current power supply system in China to supply power to a main power supply of an airplane. The ground maintenance detection instrument and the communication equipment are powered by an AC220V (50 Hz) power supply, so that the airport power supply vehicle cannot directly power various detection instruments and communication equipment, and great inconvenience is caused. Therefore, it is necessary to convert 115V, 400HZ constant speed constant frequency three-phase AC power supply into AC220V (50 HZ) power supply by using an aviation power supply converter, and the principle of the aviation power supply converter is an integrated body composed of an AC/dc inverter and a corresponding voltage stabilizing circuit, and the design of the inverter module is a design difficulty of the aviation power supply converter.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a power supply conversion circuit of an aviation case.
In order to achieve the above object, the present utility model provides the following technical solutions:
a power supply conversion circuit of an aircraft comprises an AC-DC power supply module and an inversion module;
the inversion module includes:
the input end of the high-frequency boosting circuit is connected with the output end of the AC-DC power supply module;
the input end of the high-frequency SPWM inverter circuit is connected with the output end of the high-frequency booster circuit;
and the input end of the EMI filter is connected with the output end of the high-frequency SPWM inverter circuit, and the output end of the EMI filter is connected with load equipment.
Preferably, two groups of first capacitors are connected in parallel between the AC-DC power supply module and the high-frequency boost circuit.
Preferably, two groups of second capacitors are arranged in parallel between the high-frequency boosting circuit and the high-frequency SPWM inverter circuit.
Preferably, the high-frequency boosting circuit comprises an LLC circuit, a high-frequency isolation transformer and a rectifying circuit which are sequentially connected, wherein the input end of the LLC circuit is electrically connected with the output end of the AC-DC power supply module, and the output end of the rectifying circuit is electrically connected with the input end of the high-frequency SPWM inverter circuit.
Preferably, the system further comprises a control module, wherein the control module comprises: the intelligent control device comprises an MCU controller, two IGBT driving boards, an input sampling circuit, a direct current bus sampling temperature circuit and an output sampling circuit, wherein the output ends of the input sampling circuit and the direct current bus sampling temperature circuit are electrically connected with the input end of the MCU controller, the input ends of the output sampling circuit and the two IGBT driving boards are electrically connected with the output end of the MCU controller, and the output ends of the two IGBT driving boards are respectively electrically connected with the LLC circuit and the high-frequency SPWM inverter circuit.
Preferably, the power supply comprises an isolation power supply module and a third DC-DC module, wherein the isolation power supply module comprises a first DC-DC module and two second DC-DC modules, the output end of the first DC-DC module is electrically connected with the input end of the third DC-DC module, the output end of the third DC-DC module is electrically connected with the input end of the MCU controller, and the output ends of the two second DC-DC modules are respectively electrically connected with the input ends of the two IGBT driving boards.
Preferably, the first path of DC-DC module converts the DC120V-180V voltage at the input end of the isolation power supply module into DC12V voltage, and the two second paths of DC-DC modules convert the DC120V-180V voltage at the input end of the isolation power supply module into two paths of DC15V voltage; and the third path of DC-DC module converts the DC12V voltage at the output end of the first path of DC-DC module into DC5V and 3.3V voltages.
Preferably, the sampling parameters of the input sampling circuit and the output sampling circuit are voltage and current.
The power supply conversion circuit of the aviation case provided by the utility model has the following beneficial effects:
the inversion module of the aviation power supply conversion circuit can stably boost the voltage of an AC115V (400 Hz) at the input end to DC400V through the high-frequency boost circuit, then the voltage is inverted to AC220V/50HZ through the high-frequency inversion conversion circuit, and finally the voltage is output to load equipment through an EMI filter capacitor.
Drawings
In order to more clearly illustrate the embodiments of the present utility model and the design thereof, the drawings required for the embodiments will be briefly described below. The drawings in the following description are only some of the embodiments of the present utility model and other drawings may be made by those skilled in the art without the exercise of inventive faculty.
FIG. 1 is an overall circuit diagram of a power conversion circuit for an aircraft cabin in accordance with an embodiment of the present utility model;
fig. 2 is a circuit diagram of an inverter module.
Detailed Description
The present utility model will be described in detail below with reference to the drawings and the embodiments, so that those skilled in the art can better understand the technical scheme of the present utility model and can implement the same. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly specified or limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more, and will not be described in detail herein.
Examples
The utility model provides a power supply conversion circuit of an aviation case, which is particularly shown in figures 1-2 and comprises an AC-DC power supply module and an inversion module.
The input voltage of the power supply conversion circuit of the aviation case is AC115V (400 Hz), after the AC-DC power supply module is passed, the AC-DC power supply module converts the voltage of the AC115V (400 Hz) into DC120V-180V and outputs the DC120V-180V, and the voltage is the input voltage of the inversion module. The inversion module comprises a high-frequency boost circuit, a high-frequency SPWM inversion circuit and an EMI filter. The input end of the high-frequency boosting circuit is connected with the output end of the AC-DC power supply module; the input end of the high-frequency SPWM inverter circuit is connected with the output end of the high-frequency booster circuit; the input end of the EMI filter is connected with the output end of the high-frequency SPWM inverter circuit, and the output end is connected with load equipment; the high-frequency boosting circuit comprises an LLC circuit, a high-frequency isolation transformer and a rectifying circuit which are sequentially connected, wherein the input end of the LLC circuit is electrically connected with the output end of the AC-DC power supply module, the output end of the rectifying circuit is electrically connected with the input end of the high-frequency SPWM inverting circuit, the LLC circuit, the high-frequency isolation transformer and the rectifying circuit boost and rectify the input DC120V-180V voltage to DC400V, the DC400V is inverted to AC220V/50HZ through the high-frequency inverting circuit, and finally the AC220V/50HZ is output to load equipment through an EMI filter capacitor. Two groups of first capacitors connected in parallel are arranged between the AC-DC power supply module and the high-frequency boost circuit, and two groups of second capacitors connected in parallel are arranged between the high-frequency boost circuit and the high-frequency SPWM inverter circuit, so that interference in the voltage transmission process can be reduced.
In this embodiment, the control module further includes a control module, the control module includes an MCU controller, two IGBT driving boards, an input sampling circuit, a dc bus sampling temperature circuit and an output sampling circuit, the output ends of the input sampling circuit and the dc bus sampling temperature circuit are electrically connected with the input end of the MCU controller, the input ends of the output sampling circuit and the two IGBT driving boards are electrically connected with the output end of the MCU controller, the output ends of the two IGBT driving boards are electrically connected with an LLC circuit and a high-frequency SPWM inverter circuit, and sampling parameters of the input sampling circuit and the output sampling circuit are both voltage and current. The MCU control module performs A/D conversion on the collected signals, is then connected with the driving module of the SPWM inverter circuit, can adjust the SPWM control signals according to the collected output voltage and current signals, and outputs the SPWM control signals to the SPWM driving module, and adjusts the SPWM duty ratio, so that the output voltage of the inverter module can correspondingly change along with the input voltage and current. The inverter circuit adopts a single MCU to realize a multifunctional numerical control inverter power supply, and the reliability, performance and conversion efficiency of the whole circuit system are greatly improved.
The isolation power supply module comprises a first path of DC-DC module and two second paths of DC-DC modules, the output end of the first path of DC-DC module is electrically connected with the input end of the third path of DC-DC module, the output end of the third path of DC-DC module is electrically connected with the input end of the MCU controller, and the output ends of the two second paths of DC-DC modules are respectively electrically connected with the input ends of the two IGBT driving boards. The first path of DC-DC module converts the DC120V-180V voltage at the input end of the isolation power supply module into DC12V voltage, the third path of DC-DC module converts the DC12V voltage at the output end of the first path of DC-DC module into DC5V and 3.3V voltage to supply power for the MCU controller, and the two second paths of DC-DC modules convert the DC120V-180V voltage at the input end of the isolation power supply module into two paths of DC15V voltage to supply power for the two IGBT driving boards. Because the input voltage DC120-180V is converted into two paths of 15V to supply power to the IGBT driving board and one path of 12V to supply power to the DC/DC module after passing through the isolation power supply module, in order to prevent the input voltage from deviating by +/-15% during power supply, data acquisition and monitoring of the voltage and the current are needed so as to give an alarm in time. The input sampling circuit directly samples by using a special ADC chip AD7706 of ADI company, and the voltage is sampled by resistor voltage division; the current sampling is converted into voltage through a series power resistor for sampling; the direct current bus sampling temperature circuit selects a special temperature sensor chip DS18B20Z to realize temperature sampling, the purpose of collecting bus temperature is to monitor the bus temperature, and if instantaneous heavy current occurs in the working process of the inverter, the temperature of the bus is increased, so that the alarm can be timely given out. The output sampling circuit is used for indicating whether the inverter circuit is normal or not.
As can be seen from the above description, the inverter module of the aviation power supply conversion circuit can stably boost the voltage of the AC115V (400 Hz) at the input end to DC400V through the high-frequency boost circuit, then invert to AC220V/50Hz through the high-frequency inverter conversion circuit, and finally output to the load device through the EMI filter capacitor.
The above embodiments are merely preferred embodiments of the present utility model, the protection scope of the present utility model is not limited thereto, and any simple changes or equivalent substitutions of technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present utility model disclosed in the present utility model belong to the protection scope of the present utility model.
Claims (8)
1. The power supply conversion circuit of the aviation case is characterized by comprising an AC-DC power supply module and an inversion module;
the inversion module includes:
the input end of the high-frequency boosting circuit is connected with the output end of the AC-DC power supply module;
the input end of the high-frequency SPWM inverter circuit is connected with the output end of the high-frequency booster circuit;
and the input end of the EMI filter is connected with the output end of the high-frequency SPWM inverter circuit, and the output end of the EMI filter is connected with load equipment.
2. The power conversion circuit of an aircraft tank of claim 1, wherein two sets of first capacitors are connected in parallel between the AC-DC power module and the high frequency boost circuit.
3. The power conversion circuit of an aircraft cabin according to claim 1, wherein two sets of second capacitors are arranged in parallel between the high frequency boost circuit and the high frequency SPWM inverter circuit.
4. The power conversion circuit of an aircraft tank according to claim 1, wherein the high frequency boost circuit comprises an LLC circuit, a high frequency isolation transformer, and a rectifier circuit connected in sequence, an input of the LLC circuit being electrically connected to an output of the AC-DC power module, an output of the rectifier circuit being electrically connected to an input of the high frequency SPWM inverter circuit.
5. The power conversion circuit of an aircraft cabin according to claim 4, further comprising a control module comprising: the intelligent control device comprises an MCU controller, two IGBT driving boards, an input sampling circuit, a direct current bus sampling temperature circuit and an output sampling circuit, wherein the output ends of the input sampling circuit and the direct current bus sampling temperature circuit are electrically connected with the input end of the MCU controller, the input ends of the output sampling circuit and the two IGBT driving boards are electrically connected with the output end of the MCU controller, and the output ends of the two IGBT driving boards are respectively electrically connected with the LLC circuit and the high-frequency SPWM inverter circuit.
6. The power conversion circuit of an aircraft cabin according to claim 5, further comprising an isolation power module and a third path of DC-DC modules, wherein the isolation power module comprises a first path of DC-DC module and two second paths of DC-DC modules, the output end of the first path of DC-DC module is electrically connected with the input end of the third path of DC-DC module, the output end of the third path of DC-DC module is electrically connected with the input end of the MCU controller, and the output ends of the two second paths of DC-DC modules are respectively electrically connected with the input ends of the two IGBT driving boards.
7. The power conversion circuit of an aircraft cabin according to claim 6, wherein the first DC-DC module converts the DC120V-180V voltage at the input of the isolated power module to a DC12V voltage, and the two second DC-DC modules convert the DC120V-180V voltage at the input of the isolated power module to two DC15V voltages; and the third path of DC-DC module converts the DC12V voltage at the output end of the first path of DC-DC module into DC5V and 3.3V voltages.
8. The power conversion circuit of an aircraft cabin according to claim 5, wherein the sampling parameters of the input and output sampling circuits are voltage and current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221842910.0U CN219477850U (en) | 2022-07-18 | 2022-07-18 | Power supply conversion circuit of aviation case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221842910.0U CN219477850U (en) | 2022-07-18 | 2022-07-18 | Power supply conversion circuit of aviation case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219477850U true CN219477850U (en) | 2023-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221842910.0U Active CN219477850U (en) | 2022-07-18 | 2022-07-18 | Power supply conversion circuit of aviation case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219477850U (en) |
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2022
- 2022-07-18 CN CN202221842910.0U patent/CN219477850U/en active Active
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