CN216122241U - Equipment power supply conversion unit - Google Patents
Equipment power supply conversion unit Download PDFInfo
- Publication number
- CN216122241U CN216122241U CN202122304672.XU CN202122304672U CN216122241U CN 216122241 U CN216122241 U CN 216122241U CN 202122304672 U CN202122304672 U CN 202122304672U CN 216122241 U CN216122241 U CN 216122241U
- Authority
- CN
- China
- Prior art keywords
- module
- power supply
- electrically connected
- conversion circuit
- conversion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model provides an equipment power supply conversion unit which comprises a first conversion circuit and a second conversion circuit, wherein the input end of the first conversion circuit and the input end of the second conversion circuit are respectively and electrically connected to an external input power supply, the output end of the first conversion circuit is electrically connected to the input end of the second conversion circuit, and the output end of the second conversion circuit is respectively and electrically connected to an equipment internal module and an equipment internal module. The equipment power supply conversion unit has the functions of overheat protection, overvoltage protection, overcurrent protection and short-circuit protection, wherein digital electricity and analog electricity output by the power supply unit are converted by different DC-DC modules in the DC-DC conversion process, and signals are prevented from being mutually coupled between a digital circuit and an analog circuit through a power supply path, so that the quality of output signals is influenced.
Description
Technical Field
The utility model belongs to the field of power supplies, and particularly relates to a power supply conversion unit of equipment.
Background
At present, more and more transportation devices are driven by electricity, and a power system is an important component of the transportation devices and is used for maintaining the operation of various electric devices, so that the normal operation of the power system is related to the safe driving of the transportation devices, but the existing power module is an independent standard 2U chassis with the installation size of 482.6mm × 600mm × 88.9 mm. When the device is used in equipment, the integration level is low, and the structure needs to be optimized.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a device power conversion unit to solve the deficiencies of the prior art.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
the utility model provides an equipment power supply conversion unit, includes a converting circuit and No. two converting circuits, and the input of a converting circuit, the input electricity of No. two converting circuits are connected to external input power respectively, and the output electricity of a converting circuit is connected to the input of No. two converting circuits, and the output electricity of No. two converting circuits is connected to the inside module of a equipment and the inside module of No. two equipment respectively.
Further, the first converting circuit comprises a rectifier bridge circuit and an AC-DC converting circuit, wherein the input end of the rectifier bridge circuit is electrically connected to an external input power supply, the output end of the rectifier bridge circuit is electrically connected to the input end of the AC-DC converting circuit, and the output end of the AC-DC converting circuit is electrically connected to the input end of the second converting circuit.
Further, the second conversion circuit comprises a first DC-DC module group, a second DC-DC module group, a first isolation module, a second isolation module, a digital secondary power supply module and an analog secondary power supply module, wherein the input ends of the first DC-DC module group and the second DC-DC module group are electrically connected to the output end of the AC-DC conversion circuit in parallel, the output end of the first DC-DC module group is electrically connected to the input end of the first isolation module, the input end of the first isolation module is also electrically connected to an external input power supply, the output end of the first isolation module is electrically connected to the input end of the analog secondary power supply module, the output end of the analog secondary power supply module is electrically connected to the second equipment internal module, the output end of the second DC-DC module group is electrically connected to the input end of the second isolation module, and the input end of the second isolation module is also electrically connected to the external input power supply, the output end of the second isolation module is electrically connected to the input end of the digital secondary power supply module, and the output end of the digital secondary power supply module is electrically connected to the first equipment internal module.
Furthermore, the number of the first DC-DC module group, the second DC-DC module group, the first isolation module, the second isolation module, the digital secondary power supply module and the analog secondary power supply module can be multiple, the first DC-DC module group, the first isolation module and the analog secondary power supply module correspond to each other one by one, and the second DC-DC module group, the second isolation module and the digital secondary power supply module correspond to each other one by one.
Furthermore, the digital secondary power supply module comprises a plurality of first DC-DC conversion circuits which are all arranged in parallel, the input end of each first DC-DC conversion circuit is electrically connected to the second isolation module, and the output end of each first DC-DC conversion circuit is electrically connected to the first equipment internal module.
Furthermore, the analog secondary power supply module comprises a plurality of second DC-DC conversion circuits which are all arranged in parallel, the input end of each second DC-DC conversion circuit is electrically connected to the first isolation module, and the output end of each second DC-DC conversion circuit is electrically connected to the second equipment internal module.
Further, the external input power supply comprises 220V/50Hz alternating current power supply and 28V direct current power supply, wherein the 220V/50Hz alternating current power supply is used for supplying power to the first conversion circuit, and the 28V direct current power supply is used for supplying power to the second conversion circuit.
Compared with the prior art, the equipment power supply conversion unit has the following advantages:
(1) the equipment power supply conversion unit has the functions of overheat protection, overvoltage protection, overcurrent protection and short-circuit protection, wherein digital electricity and analog electricity output by the power supply unit are converted by different DC-DC modules in the DC-DC conversion process, and signals are prevented from being mutually coupled between a digital circuit and an analog circuit through a power supply path, so that the quality of output signals is influenced.
(2) The equipment power supply conversion unit adopts a modular power supply, and a controller, a power device and an energy conversion device are integrated in the equipment power supply conversion unit, so that the design of a peripheral circuit is greatly simplified, the reliability is improved, the requirements of safety, reliability and convenience in use are met under the continuous working condition, and the equipment power supply conversion unit has certain overload resistance.
(3) The equipment power supply conversion unit adopts a modular power supply, and adopts technical means such as power supply isolation, voltage stabilization filtration and the like to isolate equipment from an external power supply, so that the mutual crosstalk between the equipment and the external power supply is prevented. The power supply design meets the electromagnetic compatibility requirement.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
fig. 1 is a schematic block diagram of an overall structure of a device power conversion unit according to an embodiment of the present invention;
fig. 2 is a front view of the overall structure of a power conversion unit of an apparatus according to an embodiment of the present invention;
fig. 3 is a left side view of an overall structure of a device power conversion unit according to an embodiment of the present invention;
fig. 4 is a top view of an overall structure of a device power conversion unit according to an embodiment of the present invention.
Description of reference numerals:
1. a first conversion circuit; 11. a rectifier bridge circuit; 12. an AC-DC conversion circuit; 2. a second conversion circuit; 21. a first DC-DC module group; 22. a second DC-DC module group; 23. an isolation module I; 24. a second isolation module; 25. a digital secondary power supply module; 251. a first DC-DC conversion circuit; 26. simulating a secondary power supply module; 261. a second DC-DC conversion circuit; 3. an external input power supply; 4. a first device internal module; 5. and a second equipment internal module.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 4, in this embodiment, the power conversion unit of the present device is designed as a 1500W power unit, which can convert an external power into a secondary power required by each module inside the device. The power supply unit selects a 220V/50Hz alternating current power supply and a 28V direct current power supply to supply power, and can select one power supply mode according to the power supply environment.
1. Power supply design index
The main specifications of the power supply design are shown in table 1.
TABLE 1 Equipment Power index Allocation
2. Composition and principle
The utility model provides an equipment power supply conversion unit, includes converting circuit 1 and No. two converting circuit 2, and the input of converting circuit 1, the input electricity of No. two converting circuit 2 are connected to external input power 3 respectively, and the output electricity of converting circuit 1 is connected to the input of No. two converting circuit 2, and the output electricity of No. two converting circuit 2 is connected to equipment interior module 4 and No. two equipment interior modules 5 respectively.
The power supply conversion unit of the equipment has the functions of overheat protection, overvoltage protection, overcurrent protection and short-circuit protection, wherein digital electricity and analog electricity output by the power supply unit are converted by using different DC-DC modules in the DC-DC conversion process, and signals are prevented from being mutually coupled between a digital circuit and an analog circuit through a power supply path, so that the quality of output signals is influenced.
The power supply conversion unit of the equipment adopts a modularized power supply, a controller, a power device and a transducer are integrated in the power supply conversion unit, the controller and the transducer are devices used in a power supply module, the design of a peripheral circuit is simplified to a great extent, the reliability is improved, the requirements of safety, reliability and convenience in use are met under the continuous working condition, and certain overload resistance is achieved.
The power supply conversion unit of the equipment adopts technical means such as power supply isolation, voltage stabilization filtration and the like to isolate the equipment from an external power supply, so that mutual crosstalk between the equipment and the external power supply is prevented. The power supply design meets the electromagnetic compatibility requirement.
The first converting circuit 1 includes a rectifier bridge circuit 11 and an AC-DC converting circuit 12, an input terminal of the rectifier bridge circuit 11 is electrically connected to the external input power supply 3, an output terminal of the rectifier bridge circuit 11 is electrically connected to an input terminal of the AC-DC converting circuit 12, and an output terminal of the AC-DC converting circuit 12 is electrically connected to an input terminal of the second converting circuit 2. The first conversion circuit 1 mainly completes the conversion of the primary power of externally input alternating current AC220V into high voltage direct current 300V after being filtered by a high performance filter and input bridge rectification.
The second conversion circuit 2 comprises a first DC-DC module group 21, a second DC-DC module group 22, a first isolation module 23, a second isolation module 24, a digital secondary power supply module 25 and an analog secondary power supply module 26, wherein the input ends of the first DC-DC module group 21 and the second DC-DC module group 22 are electrically connected to the output end of the AC-DC conversion circuit 12 in parallel, the output end of the first DC-DC module group 21 is electrically connected to the input end of the first isolation module 23, the input end of the first isolation module 23 is also electrically connected to an external input power supply 3, the output end of the first isolation module 23 is electrically connected to the input end of the analog secondary power supply module 26, the output end of the analog secondary power supply module 26 is electrically connected to the second equipment internal module 5, and the output end of the second DC-DC module group 22 is electrically connected to the input end of the second isolation module 24, the input end of the second isolation module 24 is also electrically connected to the external input power supply 3, the output end of the second isolation module 24 is electrically connected to the input end of the digital secondary power supply module 25, and the output end of the digital secondary power supply module 25 is electrically connected to the first device internal module 4.
The second conversion circuit 2 mainly performs the following two functions:
1. after being isolated by an isolation module, external input +28V is converted into a secondary power supply required by each module in the case through a DC-DC module, and power supply ripple noise is filtered;
2. after the high-voltage direct current 300V converted and output by the AC-DC power supply part is converted into 28V, the high-voltage direct current is converted into a secondary power supply required by each module in the case through the DC-DC module through the isolation module, and power supply ripple noise is filtered.
The number of the first DC-DC module group 21, the second DC-DC module group 22, the first isolation module 23, the second isolation module 24, the digital secondary power supply module 25 and the analog secondary power supply module 26 can be multiple, the first DC-DC module group 21, the first isolation module 23 and the analog secondary power supply module 26 correspond to one another, and the second DC-DC module group 22, the second isolation module 24 and the digital secondary power supply module 25 correspond to one another.
The first isolation module 23 and the second isolation module 24 have the same structure, and the first isolation module 23 and the second isolation module 24 isolate the equipment from the external power supply by adopting technical means such as power isolation, voltage stabilization filtration and the like, so that mutual crosstalk between the equipment and the external power supply is prevented. The power supply design meets the electromagnetic compatibility requirement. The first isolation module 23 and the second isolation module 24 both adopt a Vicor DCM3623T36G40C2T00 isolation voltage stabilization type converter, provide electrical isolation between input and output, and achieve higher safety.
The digital secondary power supply module 25 comprises a plurality of first DC-DC conversion circuits 251, the plurality of first DC-DC conversion circuits 251 are arranged in parallel, the input end of each first DC-DC conversion circuit 251 is electrically connected to the second isolation module 24, and the output end of each first DC-DC conversion circuit 251 is electrically connected to the first equipment internal module 4.
The analog secondary power supply module 26 comprises a plurality of second DC-DC conversion circuits 261, the plurality of second DC-DC conversion circuits 261 are all arranged in parallel, the input end of each second DC-DC conversion circuit 261 is electrically connected to the first isolation module 23, and the output end of each second DC-DC conversion circuit 261 is electrically connected to the second device internal module 5.
The external input power supply 3 comprises 220V/50Hz alternating current power supply and 28V direct current power supply, wherein the 220V/50Hz alternating current power supply is used for supplying power to the first conversion circuit 1, and the 28V direct current power supply is used for supplying power to the second conversion circuit 2.
Example 1
The utility model provides an equipment power supply conversion unit, includes converting circuit 1 and No. two converting circuit 2, and the input of converting circuit 1, the input electricity of No. two converting circuit 2 are connected to external input power 3 respectively, and the output electricity of converting circuit 1 is connected to the input of No. two converting circuit 2, and the output electricity of No. two converting circuit 2 is connected to equipment interior module 4 and No. two equipment interior modules 5 respectively. The number of the first device internal module 4 and the second device internal module 5 may be plural, the external input power supply 3 includes 220V/50Hz ac power supply and 28V dc power supply, the 220V/50Hz ac power supply is used for supplying power to the first conversion circuit 1, and the 28V dc power supply is used for supplying power to the second conversion circuit 2. The specific data can be designed according to the actual situation of the device, and in this embodiment, the number of the first device internal module 4 and the number of the second device internal module 5 are 1 respectively.
The first conversion circuit 1 includes a rectifier bridge circuit 11 and an AC-DC conversion circuit 12, an input terminal of the rectifier bridge circuit 11 is electrically connected to the 220V/50Hz alternating current of the external input power source 3, an output terminal of the rectifier bridge circuit 11 is electrically connected to an input terminal of the AC-DC conversion circuit 12, and an output terminal of the AC-DC conversion circuit 12 outputs a DC300V current and supplies a DC300V current to input terminals of the first DC-DC module group 21 and the second DC-DC module group 22, respectively.
The second conversion circuit 2 comprises a first DC-DC module group 21, a second DC-DC module group 22, a first isolation module 23, a second isolation module 24, a digital secondary power supply module 25 and an analog secondary power supply module 26, wherein the input ends of the first DC-DC module group 21 and the second DC-DC module group 22 are electrically connected to the output end of the AC-DC conversion circuit 12 in parallel, the power of the first DC-DC module group 21 is 1000W, the output end of the first DC-DC module group 21 outputs DC28V direct current and transmits the DC28V direct current to the input end of the first isolation module 23, the input end of the first isolation module 23 is also electrically connected to DC28V direct current of an external input power supply 3, the output end of the first isolation module 23 is electrically connected to the input end of the analog secondary power supply module 26, the output end of the analog secondary power supply module 26 is electrically connected to the second equipment internal module 5, the power of the second DC-DC module group 22 is 500W, the output end of the second DC-DC module group 22 outputs DC28V direct current and transmits the DC28V direct current to the input end of the second isolation module 24, the input end of the second isolation module 24 is also electrically connected to DC28V direct current of the external input power supply 3, the output end of the second isolation module 24 is electrically connected to the input end of the digital secondary power supply module 25, and the output end of the digital secondary power supply module 25 is electrically connected to the first equipment internal module 4.
The number of the first DC-DC module group 21, the second DC-DC module group 22, the first isolation module 23, the second isolation module 24, the digital secondary power module 25 and the analog secondary power module 26 may be plural, in this embodiment, the number of the first DC-DC module group 21, the second DC-DC module group 22, the first isolation module 23, the second isolation module 24, the digital secondary power module 25 and the analog secondary power module 26 is 1, the first DC-DC module group 21, the first isolation module 23 and the analog secondary power module 26 are in one-to-one correspondence, and the second DC-DC module group 22, the second isolation module 24 and the digital secondary power module 25 are in one-to-one correspondence.
The digital secondary power supply module 25 comprises 4 first DC-DC conversion circuits 251, the 4 first DC-DC conversion circuits 251 are all arranged in parallel, the input end of each first DC-DC conversion circuit 251 is electrically connected to the second isolation module 24, the output end of each first DC-DC conversion circuit 251 is electrically connected to the first device internal module 4, and the output currents are +12V, -12V, +5V, + 3.3V.
The analog secondary power supply module 26 includes 5 second DC-DC conversion circuits 261, the 5 second DC-DC conversion circuits 261 are all arranged in parallel, the input end of each second DC-DC conversion circuit 261 is electrically connected to the first isolation module 23, the output end of each second DC-DC conversion circuit 261 is electrically connected to the second device internal module 5, and the output currents are +28V, +12V, +6V, +9V, -12V, respectively. The number of the first DC-DC conversion circuit 251 and the second DC-DC conversion circuit 261 can be designed according to the actual situation of the device.
The first device internal module 4 and the second device internal module 5 refer to specific devices powered by power, such as a radio frequency inspection instrument, an intelligent tool cabinet and the like, and the internal modules of the devices need power supply of various voltages.
The equipment power supply conversion unit is optimized from an independent standard 2U case to be integrated in the equipment case, and the installation size is optimized from 482.6mm multiplied by 600mm multiplied by 88.9mm to 227mm multiplied by 121.28mm multiplied by 100 mm. This equipment power conversion unit can promote the integrated level of equipment, greatly reduced equipment volume.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. An apparatus power conversion unit, characterized by: the power supply comprises a first conversion circuit (1) and a second conversion circuit (2), wherein the input end of the first conversion circuit (1) and the input end of the second conversion circuit (2) are respectively and electrically connected to an external input power supply (3), the output end of the first conversion circuit (1) is electrically connected to the input end of the second conversion circuit (2), and the output end of the second conversion circuit (2) is respectively and electrically connected to a first equipment internal module (4) and a second equipment internal module (5).
2. The device power conversion unit of claim 1, wherein: the first conversion circuit (1) comprises a rectifier bridge circuit (11) and an AC-DC conversion circuit (12), wherein the input end of the rectifier bridge circuit (11) is electrically connected to an external input power supply (3), the output end of the rectifier bridge circuit (11) is electrically connected to the input end of the AC-DC conversion circuit (12), and the output end of the AC-DC conversion circuit (12) is electrically connected to the input end of the second conversion circuit (2).
3. The device power conversion unit of claim 2, wherein: the second conversion circuit (2) comprises a first DC-DC module group (21), a second DC-DC module group (22), a first isolation module (23), a second isolation module (24), a digital secondary power supply module (25) and an analog secondary power supply module (26), wherein the input ends of the first DC-DC module group (21) and the second DC-DC module group (22) are electrically connected to the output end of the AC-DC conversion circuit (12) in parallel, the output end of the first DC-DC module group (21) is electrically connected to the input end of the first isolation module (23), the input end of the first isolation module (23) is also electrically connected to an external input power supply (3), the output end of the first isolation module (23) is electrically connected to the input end of the analog secondary power supply module (26), and the output end of the analog secondary power supply module (26) is electrically connected to a second equipment internal module (5), the output end of the second DC-DC module group (22) is electrically connected to the input end of the second isolation module (24), the input end of the second isolation module (24) is also electrically connected to an external input power supply (3), the output end of the second isolation module (24) is electrically connected to the input end of the digital secondary power supply module (25), and the output end of the digital secondary power supply module (25) is electrically connected to the first equipment internal module (4).
4. The device power conversion unit of claim 3, wherein: the number of the first DC-DC module group (21), the second DC-DC module group (22), the first isolation module (23), the second isolation module (24), the digital secondary power supply module (25) and the analog secondary power supply module (26) can be multiple, the first DC-DC module group (21), the first isolation module (23) and the analog secondary power supply module (26) correspond to one another, and the second DC-DC module group (22), the second isolation module (24) and the digital secondary power supply module (25) correspond to one another.
5. The device power conversion unit of claim 3, wherein: the digital secondary power supply module (25) comprises a plurality of first DC-DC conversion circuits (251), the plurality of first DC-DC conversion circuits (251) are all arranged in parallel, the input end of each first DC-DC conversion circuit (251) is electrically connected to the second isolation module (24), and the output end of each first DC-DC conversion circuit (251) is electrically connected to the first equipment internal module (4).
6. The device power conversion unit of claim 3, wherein: the analog secondary power supply module (26) comprises a plurality of second DC-DC conversion circuits (261), the plurality of second DC-DC conversion circuits (261) are all arranged in parallel, the input end of each second DC-DC conversion circuit (261) is electrically connected to the first isolation module (23), and the output end of each second DC-DC conversion circuit (261) is electrically connected to the second equipment internal module (5).
7. The device power conversion unit of claim 1, wherein: the external input power supply (3) comprises 220V/50Hz alternating current power supply and 28V direct current power supply, wherein the 220V/50Hz alternating current power supply is used for supplying power to the first conversion circuit (1), and the 28V direct current power supply is used for supplying power to the second conversion circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122304672.XU CN216122241U (en) | 2021-09-23 | 2021-09-23 | Equipment power supply conversion unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122304672.XU CN216122241U (en) | 2021-09-23 | 2021-09-23 | Equipment power supply conversion unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216122241U true CN216122241U (en) | 2022-03-22 |
Family
ID=80688036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122304672.XU Active CN216122241U (en) | 2021-09-23 | 2021-09-23 | Equipment power supply conversion unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216122241U (en) |
-
2021
- 2021-09-23 CN CN202122304672.XU patent/CN216122241U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10720787B2 (en) | Combined charger and power converter | |
| EP2887491A1 (en) | Power conversion device for charging batteries | |
| US9088221B2 (en) | High-voltage power supply module and power supply system | |
| CN208386212U (en) | A kind of uninterruptible power supply | |
| CN111251930A (en) | Direct current fills electric pile equipment | |
| US11811300B2 (en) | Isolated converter | |
| US11440423B2 (en) | System and method for on-board charger with a pulsating buffer | |
| CN216122241U (en) | Equipment power supply conversion unit | |
| KR200428273Y1 (en) | Rectification system within storage battery | |
| CN202818129U (en) | DSP-controlled adjustable large power distribution type DC power supply | |
| CN211579667U (en) | Direct current charging power supply system | |
| CN210225255U (en) | Vehicle fuel cell DC-DC converter and vehicle power system | |
| CN211655781U (en) | Charger conversion circuit | |
| CN102969919A (en) | DC-AC (direct current to alternating current) power conversion device | |
| CN209748187U (en) | Discharge circuit of high-voltage residual charge of new energy electric vehicle | |
| CN216390815U (en) | Power supply circuit and power supply device | |
| CN214756067U (en) | Novel LED display screen power supply system | |
| CN218243353U (en) | Mobile power supply | |
| CN217656471U (en) | Electrical power supply system of automatic change-over switch | |
| CN110752661A (en) | Single-phase series-parallel compensation type UPS (uninterrupted power supply) isolated by bidirectional full-bridge high frequency | |
| CN215580897U (en) | Special quick discharge circuit of power X electric capacity | |
| CN214255826U (en) | Uninterrupted power supply equipment | |
| CN109995128A (en) | Photovoltaic high-frequency isolation charging circuit and high pressure photovoltaic off-grid power supply system | |
| CN210927461U (en) | H-bridge high-voltage frequency converter power unit with laminated busbar | |
| CN212137536U (en) | Power supply system of three-level converter based on IGCT and wind power converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |