CN214380684U - AC/DC variable frequency power supply - Google Patents
AC/DC variable frequency power supply Download PDFInfo
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- CN214380684U CN214380684U CN202120560402.2U CN202120560402U CN214380684U CN 214380684 U CN214380684 U CN 214380684U CN 202120560402 U CN202120560402 U CN 202120560402U CN 214380684 U CN214380684 U CN 214380684U
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Abstract
The utility model relates to an alternating current-direct current variable frequency power supply. It includes: the AC/DC module is used for converting commercial power into 400V direct current; the DC/DC module is used for converting one path of 400V direct current into two paths of 350V direct current, and the DC/AC module is used for converting two paths of 0-350V direct current into two paths of output AC power supplies: 0-150V alternating current; the sampling module is used for collecting voltage and current signals of the output power supply; the digital control module is electrically connected with the DC/AC module and the acquisition module respectively; the acquisition module is electrically connected with the digital control module through a data isolator. The utility model discloses an acquisition module passes through the data isolator and is connected with CPLD or digital control module electricity respectively to avoid analog signal, digital signal to improve power output's stability, reliability altogether.
Description
Technical Field
The utility model relates to a power technical field relates to an alternating current-direct current variable frequency power supply.
Background
The alternating current-direct current variable frequency power supply is used as a power supply and can provide alternating current and direct current power supplies for electronic equipment, so that the alternating current-direct current variable frequency power supply is widely used; in order to ensure that the frequency, voltage and current of an output power supply meet requirements, a feedback circuit is generally designed, a sampling circuit in the feedback circuit collects analog signals such as voltage and current output by the power supply, and then the analog signals are generated by an analog-to-digital conversion circuit and fed back to a main control circuit.
Disclosure of Invention
An object of the utility model is to prior art not enough, provide an alternating current-direct current variable frequency power supply, this alternating current-direct current variable frequency voltage carries out electrical isolation to analog signal, digital signal, effectively improves power output's stability.
An AC-DC variable frequency power supply, comprising:
the AC/DC module is used for converting commercial power into 400V direct current;
a DC/DC module for converting one 400V DC power into two 350V DC powers,
the DC/AC-DC module is used for converting two paths of 350V direct current into two paths of mutually isolated output power supplies, and the two paths of mutually isolated output power supplies are respectively as follows: 0-150V alternating current or 0-150V direct current;
the sampling module is used for collecting voltage and current signals of the output power supply;
the digital control module is electrically connected with the DC/AC-DC module and the acquisition module respectively; wherein, the acquisition module is electrically connected with the digital control module through the data isolator.
Further, the power supply further comprises an output series-parallel connection and filter module, and the output series-parallel connection and filter module is used for converting 0-150V alternating current or 0-150V direct current into: and outputting the voltage of 0-300 VAC or + 300VDC, filtering and denoising, wherein the output series-parallel connection and filter module is electrically connected with the AC-DC control module through an isolation circuit, the isolation circuit comprises an optical coupler, the analog control module is connected with a light emitting part of the optical coupler, and the output series-parallel connection and filter module is connected with a light receiving part of the optical coupler.
Further, the AC/DC module includes an AC/DC power conversion module and an AC-DC control module.
Further, the DC/DC module comprises a DC/DC high-frequency isolation power module and a DC/DC high-frequency isolation control module.
Further, the DC/AC-DC module comprises a DC/AC-DC power module and a DC/AC-DC control module, wherein the DC/AC-DC control module is respectively electrically connected with the sampling module, the digital control module and the output series-parallel connection and filter module, and the DC/AC-DC control module is electrically connected with the digital control module through a data isolator.
Furthermore, the intelligent control system also comprises a communication module which is electrically connected with the digital control module.
The utility model has the advantages that: the utility model discloses an acquisition module passes through the data isolator and is connected with CPLD or digital control module electricity respectively to avoid analog signal, digital signal to improve power output's stability, reliability altogether.
Drawings
Fig. 1 is a schematic diagram of a schematic architecture of the present embodiment.
FIG. 2 is a schematic circuit diagram of a data isolator application where signals flow from the digital center module to the acquisition module.
FIG. 3 is a schematic circuit diagram of a data isolator application where signals flow from the acquisition module to the digital center module.
Fig. 4 is a schematic diagram of an isolation circuit.
Detailed Description
The following detailed description of the present invention is made with reference to the accompanying drawings. As shown in fig. 1-4.
Example 1: an AC-DC variable frequency power supply, comprising:
the AC/DC module is used for converting commercial power into 400V direct current;
a DC/DC module for converting one 400V DC power into two 350V DC powers,
the DC/AC-DC module is used for converting two paths of 350V direct current into two paths of mutually isolated output power supplies, and the two paths of mutually isolated output power supplies are respectively as follows: 0-150V alternating current or 0-150V direct current;
the sampling module is used for collecting voltage and current signals of the output power supply;
the digital control module is electrically connected with the DC/AC-DC module and the acquisition module respectively; wherein, the acquisition module is electrically connected with the digital control module through the data isolator.
In the technical scheme, the data isolator is arranged for preventing the voltage and current analog signals of the output power supply acquired by the acquisition module from interfering the MCU of the digital control module, and the acquisition module and the digital control module are connected by the data isolator, so that the digital control module is prevented from being interfered by the common ground of the digital signals and the analog signals. The display operation module is mainly a display circuit and an input circuit, and a user sets required voltage, current, waveform and protection value information through the display operation module. The digital control module comprises an MCU and a peripheral circuit.
Further, the power supply device also comprises an output series-parallel connection and filter module which is used for converting 0-300V alternating current or 0-300V direct current into: and outputting the voltage of 0-300 VAC or + 300VDC, filtering and denoising, wherein the output series-parallel connection and filter module is electrically connected with the AC-DC control module through an isolation circuit, the isolation circuit comprises an optical coupler, the analog control module is connected with a light emitting part of the optical coupler, and the output series-parallel connection and filter module is connected with a light receiving part of the optical coupler.
The output series-parallel connection and filter module receives a control signal sent by the analog control module, adjusts the voltage of an output power supply, and then filters and reduces noise; in order to avoid the influence of the control signal on the analog control module, the technical scheme is provided with an isolation circuit which mainly comprises an optical coupler and a peripheral circuit thereof and isolates the signal through the optical coupler.
Further, the AC/DC module includes an AC/DC power conversion module and an AC-DC control module.
The AC/DC power conversion module realizes the conversion output from input alternating current 90VAC-264VAC to direct current 400V through an active power factor correction booster circuit; the AC-DC control module realizes the correction of input power factors, reduces the influence of a power supply on a power grid and improves the utilization rate of electric energy.
Further, the DC/DC module comprises a DC/DC high-frequency isolation power module and a DC/DC high-frequency isolation control module.
The DC/DC high-frequency isolation power module converts 400VDC output by the AC-DC through high-frequency DC/DC isolation and outputs a plurality of isolated DC power supplies, and the technical scheme outputs two paths of 350VDC which are isolated from each other. The modules in the present application are preferably circuits
Further, the DC/AC-DC module comprises a DC/AC-DC power module and a DC/AC-DC control module, wherein the DC/AC-DC control module is respectively electrically connected with the sampling module, the digital control module and the output series-parallel connection and filter module, and the DC/AC-DC control module is electrically connected with the digital control module through a data isolator.
The DC/AC-DC power module is combined with the DC/AC-DC control module, and two isolated 350VDC power supplies which are isolated and converted from the DC/DC high frequency are converted into two paths of independent isolated 0-150 VA or 0-150 VDC outputs through the SPWM mode. The DC/AC-DC control module receives signals such as voltage, current and the like fed back by the sampling module, and sends adjusting signals to the DC/AC-DC module and the output series-parallel connection and filter module according to the signals, so that the DC/AC-DC control module can meet the output requirement of a power supply. The DC/AC-DC control module feeds back information of the output power supply and the working state of the DC/AC-DC power module to the digital control module through the data isolator, and the digital control module sends out control signals to the DC/AC-DC power module through the data isolator, such as voltage, current or waveform output by the power supply.
Furthermore, the intelligent control system also comprises a communication module which is electrically connected with the digital control module.
The communication module mainly is wired communication module and wireless communication module, and wired communication module mainly is 485, 232 communication module, and wireless communication module mainly is wiFi, bluetooth communication module, sets up communication module after, can carry out signal transmission with external electronic equipment.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the present description should not be interpreted as a limitation to the present invention.
Claims (6)
1. An AC-DC variable frequency power supply, comprising:
the AC/DC module is used for converting commercial power into 400V direct current;
a DC/DC module for converting one 400V DC power into two 350V DC powers,
the DC/AC-DC module is used for converting two paths of 350V direct current into two paths of mutually isolated output power supplies, and the two paths of mutually isolated output power supplies are respectively as follows: 0-150V alternating current or 0-150V direct current;
the sampling module is used for collecting voltage and current signals of the output power supply;
the digital control module is electrically connected with the DC/AC-DC module and the acquisition module respectively; the method is characterized in that: the acquisition module is electrically connected with the digital control module through the data isolator.
2. The ac-dc variable frequency power supply according to claim 1, wherein: the power supply also comprises an output series-parallel connection and filter module which is used for converting 0-150V alternating current or 0-150V direct current into: and outputting the voltage of 0-300 VAC or + 300VDC, filtering and denoising, wherein the output series-parallel connection and filter module is electrically connected with the AC-DC control module through an isolation circuit, the isolation circuit comprises an optical coupler, the analog control module is connected with a light emitting part of the optical coupler, and the output series-parallel connection and filter module is connected with a light receiving part of the optical coupler.
3. The ac-dc variable frequency power supply according to claim 2, wherein: the AC/DC module includes an AC/DC power conversion module and an AC-DC control module.
4. The ac-dc variable frequency power supply according to claim 3, wherein: the DC/DC module comprises a DC/DC high-frequency isolation power module and a DC/DC high-frequency isolation control module.
5. The ac-dc variable frequency power supply according to claim 4, wherein: the DC/AC-DC module comprises a DC/AC-DC power module and a DC/AC-DC control module, wherein the DC/AC-DC control module is respectively electrically connected with the sampling module, the digital control module and the output series-parallel connection and filter module, and the DC/AC-DC control module is electrically connected with the digital control module through a data isolator.
6. The ac-dc variable frequency power supply according to claim 5, wherein: the digital control system also comprises a communication module which is electrically connected with the digital control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120560402.2U CN214380684U (en) | 2021-03-18 | 2021-03-18 | AC/DC variable frequency power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120560402.2U CN214380684U (en) | 2021-03-18 | 2021-03-18 | AC/DC variable frequency power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214380684U true CN214380684U (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120560402.2U Active CN214380684U (en) | 2021-03-18 | 2021-03-18 | AC/DC variable frequency power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214380684U (en) |
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2021
- 2021-03-18 CN CN202120560402.2U patent/CN214380684U/en active Active
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