CN112737091A - High-voltage frequency converter and uninterrupted power supply system of high-voltage frequency converter - Google Patents
High-voltage frequency converter and uninterrupted power supply system of high-voltage frequency converter Download PDFInfo
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- CN112737091A CN112737091A CN202011608485.4A CN202011608485A CN112737091A CN 112737091 A CN112737091 A CN 112737091A CN 202011608485 A CN202011608485 A CN 202011608485A CN 112737091 A CN112737091 A CN 112737091A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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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
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Inverter Devices (AREA)
Abstract
The application relates to a high-voltage inverter and high-voltage inverter uninterrupted power system relates to motor control technical field, high-voltage inverter includes: a main switching power supply circuit configured to receive a first alternating current output from a mains side and output a first direct current; a standby switching power supply circuit configured to receive the second alternating current output from the power grid side and output a second direct current; meanwhile, the positive pole of the first direct current is connected with the positive pole of the second direct current, and the negative pole of the first direct current is connected with the negative pole of the second direct current. In the application, the main switching power supply circuit and the standby switching power supply circuit are mutually backup, so that the reliability of stable operation of the high-voltage frequency converter is improved.
Description
Technical Field
The application relates to the technical field of motor control, in particular to a high-voltage frequency converter and an uninterruptible power supply system of the high-voltage frequency converter.
Background
With the rapid development of modern industries, the application of high-voltage frequency converters in various industries is particularly remarkable. The stable and reliable operation of the high-voltage frequency converter is very important for motor control. And the stability of the high-voltage frequency converter depends on whether the high-voltage frequency converter can reliably supply power.
In the conventional technology, a power-taking scheme of a switching power supply circuit in a power supply control module of a high-voltage frequency converter provides power to the high-voltage frequency converter from a mains supply side. If the mains supply is powered down, the high-voltage frequency converter can be synchronously shut down, and continuous power supply cannot be realized.
In the related art, in order to solve the problem of mains supply power failure, an Uninterruptible Power Supply (UPS) is often serially connected to a power supply loop of a high-voltage frequency converter, on one hand, the UPS is additionally added to increase the cost, and a power supply matched with the UPS needs to be continuously maintained, so that a part of extra expenses are generated.
Disclosure of Invention
The embodiment of the application provides a high-voltage frequency converter and an uninterruptible power supply system of the high-voltage frequency converter, and provides a new scheme for realizing stable and reliable operation of the high-voltage frequency converter.
In a first aspect, a high-voltage frequency converter is provided, which includes:
a main switching power supply circuit configured to receive a first alternating current output from a mains side and output a first direct current;
a standby switching power supply circuit configured to receive the second alternating current output from the power grid side and output a second direct current;
meanwhile, the positive pole of the first direct current is connected with the positive pole of the second direct current, and the negative pole of the first direct current is connected with the negative pole of the second direct current.
In some embodiments, the main switching power supply circuit includes a first rectifying circuit, a first filter circuit, a first buck converter, and a first transformer, which are connected in sequence.
In some embodiments, the switch-standby power supply circuit includes a second rectifying circuit, a second filtering circuit, a second buck converter and a second transformer, which are connected in sequence.
In some embodiments, the positive pole of the secondary winding of the first transformer is connected to the positive pole of the secondary winding of the second transformer, and the negative pole of the secondary winding of the first transformer is connected to the negative pole of the secondary winding of the second transformer.
In some embodiments, the first alternating current is 380V industrial electricity.
In some embodiments, the effective values of the second alternating current and the first alternating current are the same.
In some embodiments, the first direct current is the same as the second direct current.
In a second aspect, a high-voltage inverter uninterruptible power supply system includes a third transformer and a high-voltage inverter, an input side of the third transformer is configured to be connected to a high-voltage alternating current output from a power grid side, an auxiliary winding side of the third transformer is configured to output a second alternating current, and the high-voltage inverter includes:
a main switching power supply circuit configured to receive a first alternating current output from a mains side and output a first direct current;
a standby switching power supply circuit connected to the auxiliary winding side of the third transformer, configured to receive the second alternating current and output a second direct current;
meanwhile, the positive pole of the first direct current is connected with the positive pole of the second direct current, and the negative pole of the first direct current is connected with the negative pole of the second direct current.
In some embodiments, the transformer is a phase shifting transformer.
In some embodiments, the transformer is sized to accommodate a 10KV high voltage power supply.
The beneficial effect that technical scheme that this application provided brought includes: the main switch power supply circuit and the standby switch power supply circuit are mutually backup, and the reliability of stable operation of the high-voltage frequency converter is improved.
The embodiment of the application provides a high-voltage inverter, including main switch power supply circuit and the reserve switch power supply circuit for each other is backup, main switch power supply circuit is by the power that commercial power side provided and export first direct current, reserve switch power supply circuit and provide the power and export the second direct current by the electric wire netting side, provide the direct current to the power consumption load again after first direct current and the second direct current are parallelly connected. In this application embodiment, after the commercial power falls, the power of main switch power supply circuit is cut off, and the power of being equipped with switch power supply circuit this moment still continues the power supply, the second direct current's of being equipped with switch power supply circuit output voltage with it is the same with the parallelly connected back of second direct current and first direct current provides the direct current voltage to the power consumption load again, so the condition that the high-voltage inverter shut down can not appear, demonstrate the same effect with uninterrupted power source UPS, promote the reliability that the high-voltage inverter steady operation.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a high-voltage inverter according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a main switching power supply circuit according to an embodiment of the present disclosure;
fig. 3 is a block diagram of a standby switching power supply circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of an uninterruptible power supply system of a high-voltage inverter according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
The embodiment of the application provides a high-voltage frequency converter, wherein, main switching power supply circuit and reserve switching power supply circuit are each other for backup, improve the reliability of high-voltage frequency converter steady operation.
As shown in fig. 1, an embodiment of the present application provides a high-voltage frequency converter, including:
a main switching power supply circuit configured to receive a first alternating current output from a mains side and output a first direct current;
a standby switching power supply circuit configured to receive the second alternating current output from the power grid side and output a second direct current;
meanwhile, the positive pole of the first direct current is connected with the positive pole of the second direct current, and the negative pole of the first direct current is connected with the negative pole of the second direct current.
In this embodiment, the high-voltage inverter includes main switch power supply circuit and the reserve switch power supply circuit that each other is the backup, main switch power supply circuit is by the power that commercial power side provided and export first direct current, reserve switch power supply circuit provides the power and exports the second direct current by the electric wire netting side, first direct current and second direct current provide the direct current to the power consumption load after connecting in parallel again.
When the mains supply is powered down, the power supply of the main switching power supply circuit is cut off, the power supply of the standby switching power supply circuit still continues to supply power at the moment, the voltage of the second direct current output by the standby switching power supply circuit is the same as the voltage of the direct current supplied to the power load after the first direct current is connected with the second direct current in parallel, the high-voltage frequency converter cannot be shut down, the same effect as an Uninterruptible Power Supply (UPS) is achieved, and the reliability of stable operation of the high-voltage frequency converter is improved.
As shown in fig. 2, the main switching power supply circuit includes a first rectification circuit, a first filter circuit, a first buck converter, and a first transformer, which are connected in sequence. In this embodiment, the main switching power supply circuit rectifies and filters the incoming commercial power, and outputs a first direct current through the buck converter and the first transformer, where the voltage of the first direct current is equal to the set target voltage. Meanwhile, the main switching power supply circuit is a circuit known to those skilled in the art and will not be described in detail herein.
As shown in fig. 3, the standby switching power supply circuit includes a second rectification circuit, a second filter circuit, a second buck converter, and a second transformer, which are connected in sequence. In this embodiment, the input terminals of the main switching power supply circuit and the backup switching power supply circuit are connected to the commercial power side and the power grid side, respectively, and if the first ac power input to the main switching power supply circuit and the second ac power input to the backup switching power supply circuit are different, the second transformer may adjust the voltage of the second dc power so that the voltage is equal to the target voltage.
Specifically, the positive pole of the secondary winding of the first transformer is connected with the positive pole of the secondary winding of the second transformer, and the negative pole of the secondary winding of the first transformer is connected with the negative pole of the secondary winding of the second transformer.
The first alternating current can be 220V civil power or 380V industrial power. Specifically, the first alternating current is 380V industrial electricity. In practical application, continuous power supply of the high-voltage frequency converter is often found in industry, so that the first alternating current is more suitable for 380V industrial power.
Specifically, the effective values of the second alternating current and the first alternating current are the same. When the effective values of the first alternating current and the second alternating current are the same, the main switching power supply circuit and the standby switching power supply circuit can be set to be in the same form and can be interchanged in interface.
In particular, the first direct current is the same as the second direct current. In this embodiment, the main switching power supply circuit and the standby switching power supply circuit are standby power supplies, so that the first direct current and the second direct current are the same.
As shown in fig. 4, in another aspect, the present embodiment also provides a high-voltage inverter uninterruptible power supply system, including a third transformer and a high-voltage inverter, where an input side of the third transformer is configured to access a high-voltage alternating current output from a grid side, and an auxiliary winding side of the third transformer is configured to output a second alternating current, where the high-voltage inverter includes:
a main switching power supply circuit configured to receive a first alternating current output from a mains side and output a first direct current;
a standby switching power supply circuit connected to the auxiliary winding side of the third transformer, configured to receive the second alternating current and output a second direct current;
meanwhile, the positive pole of the first direct current is connected with the positive pole of the second direct current, and the negative pole of the first direct current is connected with the negative pole of the second direct current.
In this embodiment, the high-voltage inverter includes main switch power supply circuit and the reserve switch power supply circuit that each other is the backup, main switch power supply circuit receives the first alternating current that commercial power side provided and exports first direct current, reserve switch power supply circuit receives the second alternating current that the electric wire netting side provided and exports the second direct current, provide the direct current to the electric load again after first direct current and the second direct current are parallelly connected.
When the mains supply is powered down, the power supply of the main switching power supply circuit is cut off, the power supply of the standby switching power supply circuit still continues to supply power at the moment, the voltage of the second direct current output by the standby switching power supply circuit is the same as the voltage of the direct current supplied to the power load after the first direct current is connected with the second direct current in parallel, the high-voltage frequency converter cannot be shut down, the same effect as an Uninterruptible Power Supply (UPS) is achieved, and the reliability of stable operation of the high-voltage frequency converter is improved.
Preferably, the transformer is a phase-shifting transformer.
Preferably, the transformer is sized to accommodate a 10KV high voltage power supply.
The specific embodiments of the high-voltage frequency converter in the embodiment of the present application have been described in the above specific embodiments of the high-voltage frequency converter, and are not described in detail herein.
The embodiment of the application provides a high-voltage inverter uninterrupted power source system, main switch power supply circuit receives the first alternating current of commercial power side output, precharges and inserts the electric wire netting side to shifting the phase transformer, later at excision precharge circuit, shift the phase transformer output isolated 380V second alternating current. In the embodiment, the phase-shifting transformer is precharged firstly to realize the soft start of the power grid side access, so that the reliability of the uninterrupted power supply system of the high-voltage frequency converter is improved.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; 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 application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A high-voltage frequency converter, comprising:
a main switching power supply circuit configured to receive a first alternating current output from a mains side and output a first direct current;
a standby switching power supply circuit configured to receive the second alternating current output from the power grid side and output a second direct current;
meanwhile, the positive pole of the first direct current is connected with the positive pole of the second direct current, and the negative pole of the first direct current is connected with the negative pole of the second direct current.
2. The high-voltage frequency converter according to claim 1, wherein the main switching power supply circuit comprises a first rectifying circuit, a first filtering circuit, a first buck converter and a first transformer connected in sequence.
3. The high-voltage inverter of claim 2, wherein the standby switching power supply circuit comprises a second rectifying circuit, a second filtering circuit, a second buck converter and a second transformer connected in sequence.
4. The high-voltage inverter of claim 3, wherein an anode of the secondary winding of the first transformer is connected to an anode of the secondary winding of the second transformer, and a cathode of the secondary winding of the first transformer is connected to a cathode of the secondary winding of the second transformer.
5. The high-voltage frequency converter according to claim 1, wherein the first alternating current is 380V industrial electricity.
6. The high-voltage inverter as claimed in claim 1, wherein the second alternating current and the first alternating current have the same effective value.
7. The high-voltage inverter of claim 1, wherein the first direct current is the same as the second direct current.
8. The utility model provides a high-voltage inverter uninterrupted power system which characterized in that, includes third transformer and high-voltage inverter, the input side of third transformer is configured to insert the high-voltage alternating current with the electric wire netting side output, the supplementary side of winding of third transformer is configured to output the second alternating current, high-voltage inverter includes:
a main switching power supply circuit configured to receive a first alternating current output from a mains side and output a first direct current;
a standby switching power supply circuit connected to the auxiliary winding side of the third transformer, configured to receive the second alternating current and output a second direct current;
meanwhile, the positive pole of the first direct current is connected with the positive pole of the second direct current, and the negative pole of the first direct current is connected with the negative pole of the second direct current.
9. The uninterruptable power supply system of claim 8, wherein the transformer is a phase shifting transformer.
10. The uninterruptable power supply system of high-voltage frequency converter as claimed in claim 8, wherein the specification of the transformer is adapted to 10KV high voltage power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011608485.4A CN112737091A (en) | 2020-12-30 | 2020-12-30 | High-voltage frequency converter and uninterrupted power supply system of high-voltage frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011608485.4A CN112737091A (en) | 2020-12-30 | 2020-12-30 | High-voltage frequency converter and uninterrupted power supply system of high-voltage frequency converter |
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| CN112737091A true CN112737091A (en) | 2021-04-30 |
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| CN202011608485.4A Pending CN112737091A (en) | 2020-12-30 | 2020-12-30 | High-voltage frequency converter and uninterrupted power supply system of high-voltage frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117595652A (en) * | 2024-01-19 | 2024-02-23 | 芯北电子科技(南京)有限公司 | Power management circuit, chip, communication unit and equipment |
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