CN209659171U - Power inverter - Google Patents
Power inverter Download PDFInfo
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- CN209659171U CN209659171U CN201920454893.5U CN201920454893U CN209659171U CN 209659171 U CN209659171 U CN 209659171U CN 201920454893 U CN201920454893 U CN 201920454893U CN 209659171 U CN209659171 U CN 209659171U
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- power inverter
- input terminal
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Abstract
Embodiment of the disclosure is related to a kind of power inverter.The power inverter includes output end and input terminal.The power inverter further includes converter unit, is coupling between output end and input terminal and including multiple switch element, and the multiple switch element is configured as carrying out power conversion to the input from input terminal.The power inverter further includes Electro Magnetic Compatibility EMC filter, is coupling at least one in output end and input terminal between converter unit, and is configured as the electromagnetic interference for inhibiting to generate in output end and input end.By this method, embodiment of the disclosure provides a kind of relatively reliable and safe power inverter.
Description
Technical field
Embodiment of the disclosure relates generally to electrical equipment, more specifically, embodiment of the disclosure is related to a kind of power
Converter.
Background technique
Occurs the trend of modular power inverter design in recent years.Three are generallyd use in conventional power converters
Two rank inverter of phase.With the continuous development of process of industrialization, have existed for modular power inverter efficiency and
The requirements at the higher level of design size.In addition, it is expected that modular power inverter should can have higher extension possibility
With lower production cost.
Utility model content
In order at least be partially solved problem of the prior art and other potential problems, the disclosure provides a kind of power change
Parallel operation.The power inverter can be under the premise of meeting modularized design and needing, the safety of the individual devices of raising and can
By property.The power inverter can also improve good extension possibility simultaneously.
In the disclosure in a first aspect, providing a kind of power inverter.The power inverter output end and input terminal.It should
Power inverter includes converter unit, is coupling between output end and input terminal and including multiple switch element, multiple
Switch element is configured as carrying out power conversion to the input from input terminal.In addition, the power inverter further includes that radio frequency is dry
(RFI) filter is disturbed, is coupling at least one in output end and input terminal between converter unit, and be configured as
Inhibit the electromagnetic interference generated in output end and input end.
The power inverter proposed in the first aspect is capable of providing improved stability and reliability, this can especially lead to
It crosses the local RFI filter being arranged in single deck power converter module and is implemented.RFI filter in the first aspect can
Emitted with the radio of strong attenuation individual module, without using large-scale, system-level EMC filter.
In some embodiments, converter unit includes T-type neutral point clamp (TNPC) inverter.TNPC inverter provides one
Three rank inverter structures of kind.Compared to two traditional rank inverter structures, the efficiency of inverter can be significantly improved, harmonic wave is reduced and contains
Amount reduces the design difficulty of radiator and filter.At the same time, TNPC inverter has less switch element, can drop
Low cost reduces volume.
In some embodiments, the input of input terminal includes DC voltage or alternating voltage, converter unit be configured as by
Input transformation is at the alternating voltage or DC voltage exported in output.
In some embodiments, the input of input terminal is alternating voltage, and power inverter further includes soft charge circuit.
The soft charge circuit is coupling between input terminal and converter unit and is configured as using the input from input terminal being function
The charging of rate converter.Soft charge circuit provides charge protection for power inverter, which is directly led to
Alternating Current Power Supply end is crossed to charge.
In some embodiments, power inverter further includes LCL filter, is coupling in soft charge circuit and transformation is single
Between member and it is configured to supply sinusoidal voltage.LCL filter is able to suppress the high-frequency harmonic generated in the devices.
In some embodiments, power inverter further includes control circuit.The control circuit is coupled to converter unit, soft
It charging circuit and output end and is configured to independently control being switched on or switched off for converter unit, soft charge circuit and output end.
The control circuit can be connected with converter unit, soft charge circuit and output end to independently control each of power inverter
The on-off of subdivision, in this manner it is possible to realize effective blocking for device local fault.
In some embodiments, power inverter further includes auxiliary power interface.Auxiliary power interface and control circuit coupling
Merge and is suitable for connecting with external power supply equipment.
In some embodiments, power inverter further includes shell and radiating subassembly.Radiating subassembly includes fan.The wind
Fan is suitable for being inserted into shell via the first opening being opened on shell and being configured as to being arranged in the intracorporal electricity of shell
Pneumatic module provides the cooling fluid from hull outside.Radiating subassembly further includes air filter, suitable for via being opened in shell
On the second opening and be inserted into shell and adjacent with fan.Air filter is configured as filtering cooling fluid heat dissipation group
Part further includes cooling fin.The cooling fin is disposed in the lower section of electric component and is configured as using via air filter mistake
Cooling fluid after filter cools down electric component.
On the one hand, above-mentioned radiating subassembly can be realized effective cooling of the electric component for power inverter, so that cold
But fluid has effective cooling duct inside power inverter.On the other hand, due to fan and air filter be can
Plug, can be conducive to that the radiating subassembly of power inverter is replaced and safeguarded.
Further, since the electric component of compact to be integrated in the enclosure interior of changed power device, power conversion is realized
The modularization of device.For needing the industrial scene of numerous power inverter, this power inverter can be conducive to whole
The deployment of a industry scene, on the one hand saves space, reduces cost, on the other hand convenient for safeguarding and replacement.
In some embodiments, power inverter further includes multiple pluggable connectors.Multiple pluggable connector quilt
It is respectively coupled to output end and input terminal and is configured as extending to the outside of shell.The pluggable connector can be convenient for function
Rate converter is connected to external equipment, strengthens the extension possibility of the power device.This for producing and processing system on a large scale
It is especially advantageous for manufacturing apparatus.
In some embodiments, power inverter further includes multiple fuses.Multiple fuse is respectively coupled in more
Between a pluggable connector and the output end and between multiple pluggable connectors and input terminal.Fuse is power change
The safety of parallel operation, which provides, to be advantageously assured that.
There is provided utility model content part is their tools below in order to which simplified form introduces the selection to concept
It will be further described in body embodiment.Utility model content part is not intended to identify the key feature of present disclosure or main
Feature, be also not intended to limit scope of the present disclosure.
Detailed description of the invention
The following detailed description is read with reference to the accompanying drawings, above-mentioned and other purposes, the feature of embodiment of the disclosure
It will become prone to understand with advantage.In the accompanying drawings, several embodiments of the disclosure have been illustrated by way of example, and not by way of limitation,
Wherein:
Fig. 1 shows the schematic diagram of the circuit of power inverter according to an embodiment of the present disclosure；
Fig. 2 shows power inverters according to an embodiment of the present disclosure in the case where removing cap state rear portion top view；
Fig. 3 shows power inverter according to an embodiment of the present disclosure rear portion bottom view in the case where removing cap state；
Fig. 4 shows power inverter according to an embodiment of the present disclosure front top view under closure shell cover shape state；
Fig. 5 shows the schematic diagram of the removable cooling component of power inverter according to an embodiment of the present disclosure.
In various figures, identical or corresponding label indicates identical or corresponding part.
Specific embodiment
Embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the certain of the disclosure in attached drawing
Embodiment, it should be understood that, the disclosure can be realized by various forms, and should not be construed as being limited to this
In the embodiment that illustrates, providing these embodiments on the contrary is in order to more thorough and be fully understood by the disclosure.It should be understood that
It is that being given for example only property of the accompanying drawings and embodiments effect of the disclosure is not intended to limit the protection scope of the disclosure.
Terminology used in this article " comprising " and its deformation indicate that opening includes, i.e., " including but not limited to ".Unless
Especially statement, term "or" indicate "and/or".Term "based" indicates " being based at least partially on ".Term " implemented by an example
Example " and " one embodiment " expression " at least one example embodiment "." at least one is other for term " another embodiment " expression
Embodiment ".Term " first ", " second " etc. may refer to different or identical object.Hereafter it is also possible that other are bright
True and implicit definition.
Occurs the trend of modular power inverter design in recent years.In addition, for modular power inverter
Efficiency and design size requirements at the higher level.In addition, it is expected that modular power inverter should can have higher expansion
Open up possibility and lower production cost.
Existing power device can not meet the requirement of modularization and performance simultaneously.Therefore, embodiment of the disclosure provides
A kind of power inverter, can be under the premise of meeting modularized design and needing, the safety of the individual devices of raising and can
By property.The power inverter can also improve good extension possibility simultaneously.
Fig. 1 shows the schematic diagram of the circuit of power inverter according to an embodiment of the present disclosure.As shown in Figure 1, power
Converter 100 may include output end 141 and input terminal 142.In the embodiment shown in fig. 1, input terminal 142 can input three
Phase alternating voltage, the output end 141 can export DC voltage.
Converter unit 120 is coupling between output end 141 and input terminal 142, including multiple switch element 121, with right
Input from input terminal 142 is rectified.
In some embodiments, which may include T-type neutral point clamp (TNPC).The TNPC inverter is
A kind of three rank inverters.Compared to two traditional rank inverters, the efficiency of inverter can be significantly improved, reduces harmonic content, drop
The design difficulty of low heat emission device and filter.At the same time, with the inverter of another three stage structure of three-phase, that is, clamp three
Rank (NPC) is compared, and TNPC inverter has less switch element, can reduce cost, reduces volume.
Fig. 1 is returned to, each RFI filter is coupling in output end 141 and converter unit 120 and 142 He of input terminal
Between converter unit 120.The RFI filter is used to inhibit the electromagnetic interference generated at output end 141 and input terminal 142.
RFI filter is used to cut off the path for the electromagnetic interference propagated with radiation mode.Consider to replace passing using RFI filter herein
Electro Magnetic Compatibility (EMC) filter of system, this is because cost is relatively low for RFI filter, for eliminating due to power inverter
Part caused by the case where electromagnetic interference, RFI filter can satisfy requirement, large-scale, system-level without using
EMC filter.
In some embodiments, two RFI filters 130 of substitution setting, can be only in output end 141 and input terminal 142
In one between converter unit 120 be arranged RFI filter 130, to eliminate corresponding electromagnetic interference.
Although it should be appreciated that in the embodiment being described above, using alternating voltage as input terminal 142 input simultaneously
And the principle of the disclosure is described as the output of output end 141 as example using DC voltage, but input terminal 142 is defeated
Enter and is not limited to said combination with the output of output end 141.
In in accordance with an embodiment of the present disclosure, the input of input terminal 142 may include in DC voltage or alternating voltage
Any one, and the output at output end 141 also may include any one in DC voltage or alternating voltage.Accordingly
Ground, it is various types of that converter unit 120 can be realized alternating voltage (AC)-DC voltage (DC), DC-AC, AC-AC, DC-DC etc.
Power conversion.By the way that corresponding RFI filter 130, energy are arranged between output end 141 and input terminal 142 and converter unit 120
Enough electromagnetic interferences for inhibiting to generate at output end 141 and input terminal 142, so that power inverter 100 is capable of providing and changes
Kind stability and reliability.
In some embodiments, power inverter can also include soft charge circuit 133.The soft charge circuit 133 is by coupling
It closes between input terminal 142 and converter unit 120.The soft charge circuit 133 is used to input using the exchange from input terminal 142
For power inverter charging.The soft charge circuit 133 can provide charge protection for power inverter 100, so that the power becomes
Parallel operation 100 can directly be charged by Alternating Current Power Supply end.
In addition, in some embodiments, power inverter 100 can also include LCL filter 134.The LCL filter
134 are coupling between soft charge circuit 133 and converter unit 120 and are configured to supply sinusoidal voltage.LCL filter energy
Enough inhibit the high-frequency harmonic generated in the devices.The total inductance amount as needed for LCL filter 134 is more much smaller than L-type filter,
Therefore it is considered for the gird-connected inverter equipment of low switching frequency.And LCL filter itself is a kind of three rank resonance circuits, because
This is particularly suitable for TPNC inverter mentioned above.
In some embodiments, power inverter 100 can also include control circuit 150.The control circuit 150 is coupled
To converter unit 120, soft charge circuit 133 and output end 141 and it is configured to independently control converter unit 120, soft charge
Circuit 133 and output end 141 are switched on or switched off.The control circuit 150 can with converter unit 120, soft charge circuit 133 and
Output end 141 is connected to independently control the on-off of each subdivision of power inverter 100, in this manner it is possible to realize
Effective blocking for device local fault.Moreover it is possible to realize the active control shared procedure based on control circuit 150 and mention
For the quick and independent control to functions such as rectifications.
In some embodiments, power inverter 100 further includes auxiliary power interface 160.Auxiliary power interface 160 and control
Circuit 150 processed couples and is suitable for connecting with external power supply equipment.The accessory power supply 160 for example may include for power conversion
The power supply of the fan 182 of device 100.
In some embodiments, which further includes shell 110.The shell 100 is described above for accommodating
Power inverter 100 electric component.It is real since the electric component of compact to be integrated in the enclosure interior of changed power device
The modularization of power inverter is showed.For needing the industrial scene of numerous power inverter, this power inverter
The deployment that can be conducive to entire industrial scene, on the one hand saves space, reduces cost, on the other hand convenient for safeguarding and replacement.
In addition, in some embodiments, which can also include radiating subassembly.
Fig. 2 shows power inverters 100 according to an embodiment of the present disclosure in the case where removing cap state rear portion top view,
Fig. 3 shows power inverter 100 according to an embodiment of the present disclosure rear portion bottom view in the case where removing cap state.Below in conjunction with
The power inverter 100 of embodiment of the disclosure is further described in Fig. 2 and Fig. 3.
As shown in Figures 2 and 3, electric component is accommodated in inside the shell 110 of power inverter 100.Power inverter
100 can also include radiating subassembly.The radiating subassembly may include cooling fin 181, fan 182 and air filter 183.In
Respectively as can be seen that fan 182 and air filter 183 are in 110 inside of shell close to the position of housing wall in Fig. 2 and Fig. 3
It sets.Fan 182 from the cooling fluid outside shell 110 for that will introduce in shell 110, adjacent to the fan 182 arrangement
Air filter 183 is used to filter the cooling fluid to reduce the pollution from external such as dust or moisture.Cooling fin 181
Positioned at the lower section of electric component, it can utilize via the filtered cooling fluid of air filter and cool down electric component.By
This above-mentioned radiating subassembly can be realized effective cooling of the electric component for power inverter, so that cooling fluid becomes in power
There is effective cooling duct inside parallel operation.
In some embodiments, fan 182 be suitable for via be opened on shell 110 first opening 172 (referring to Fig. 5) and
It is inserted into shell 110, and air filter 183 is suitable for being inserted into via the second opening 173 being opened on shell 110
Shell 110.This can for example be clearly shown in figures 4 and 5.In Fig. 4, shown from the visual angle outside shell 110
Fan 182 and air filter 183 are inserted into the state in shell 110, and fan 182 and air mistake is shown in FIG. 5
The state that filter 183 is pulled out from shell 110.Due to fan and air filter be it is pluggable, can be conducive to function
The radiating subassembly of rate converter is replaced and is safeguarded.
Referring again to Fig. 2 and Fig. 3, in some embodiments, power inverter 100 further includes multiple pluggable connectors
190.Multiple pluggable connector 190 is respectively coupled to output end 141 and input terminal 142 and is configured as extending to shell
The outside of body 110.The pluggable connector can be connected to external equipment convenient for power inverter, strengthen the power device
Extension possibility.This is especially advantageous for producing and processing manufacturing equipment on a large scale.
In addition, in some embodiments, power inverter 100 further includes multiple fuses 170.Multiple fuse 170
It is respectively coupled between multiple pluggable connectors 190 and output end 141 and multiple pluggable connectors 190 and input terminal
Between 142.Fuse is provided for the safety of power inverter and is advantageously assured that.In addition, the fuse can also ensure that function
Failure inside rate converter will not travel to the other equipment for being connected to the power inverter.
It may be noted that sinusoidal filter condenser 135 and sinusoidal filter reactor 136 is shown in FIG. 3, the two can
It is implemented as LCL filter 134 described above.The feed(er) reactor be used to avoid filter condenser and other systems capacitor
Resonance interaction between device.
It should be appreciated that without prejudice to the principle and conception of the disclosure, it can be to electric component described above
It replaced, added or deleted.Such as change the circuit structure of converter unit, various filters the selection of type sum number purpose with
And wiring path etc..
The presently disclosed embodiments is described above, above description is exemplary, and non-exclusive, and
It is not limited to the disclosed embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In the principle, practical application or improvement to the technology in market for best explaining each embodiment, or make the art
Other those of ordinary skill can understand various embodiments disclosed herein.
Claims (10)
1. a kind of power inverter (100) characterized by comprising
Output end (141)；
Input terminal (142)；
Converter unit (120) is coupling between the output end (141) and the input terminal (142) and opens including multiple
It closes element (121), the multiple switch element (121) is configured as carrying out power to the input from the input terminal (142)
Transformation；And
Radio frequency interference RFI filter (130), at least one be coupling in the output end (141) and the input terminal (142)
Between item and the converter unit (120), and it is configured as inhibiting in the output end (141) and the input terminal (142)
Locate the electromagnetic interference generated.
2. power inverter (100) according to claim 1, which is characterized in that the converter unit (120) includes T-type
Neutral point clamp TNPC inverter.
3. power inverter (100) according to claim 1, which is characterized in that the input of the input terminal (142)
Including DC voltage or alternating voltage, the converter unit (120) is configured as the Input transformation in the output end
(141) alternating voltage or DC voltage exported at.
4. power inverter (100) according to claim 1, which is characterized in that the input of the input terminal (142)
For alternating voltage, the power inverter (100) further includes soft charge circuit (133), be coupling in the input terminal (142) and
Between the converter unit (120) and it is configured as using the input from the input terminal (142) being the power
Converter (100) charging.
5. power inverter (100) according to claim 4, which is characterized in that the power inverter (100) further includes
LCL filter (134) is coupling between the soft charge circuit (133) and the converter unit (120) and is configured as
Sinusoidal voltage is provided.
6. power inverter (100) according to claim 5, which is characterized in that the power inverter (100) further includes
Control circuit (150), the control circuit (150) are coupled to the converter unit (120), the soft charge circuit (133)
With the output end (141) and being configured to independently control the converter unit (120), the soft charge circuit (133) and
Output end (141) are switched on or switched off.
7. power inverter (100) according to claim 6, which is characterized in that the power inverter (100) further includes
Auxiliary power interface (160), the auxiliary power interface (160) couple and are suitable for and outside with the control circuit (150)
Power supply unit connection.
8. power inverter (100) according to claim 1, which is characterized in that further include shell (110) and heat dissipation group
Part, the radiating subassembly include:
Fan (182), suitable for being inserted into the shell (110) via the first opening being opened on the shell (110),
The fan (182) is configured as providing to the electric component being arranged in the shell (110) from shell (110) outside
Cooling fluid；
Air filter (183), suitable for being inserted into the shell via the second opening being opened on the shell (110)
(110) and adjacent with the fan (182), the air filter (183) is configured as filtering the cooling fluid；And
Cooling fin (181), is disposed in the lower section of the electric component, and the cooling fin (181) is configured as using via institute
The filtered cooling fluid of air filter (183) is stated to cool down the electric component.
9. power inverter (100) according to claim 8, which is characterized in that further include multiple pluggable connectors
(170), the multiple pluggable connector (170) is respectively coupled to the output end (141) and the input terminal (142) simultaneously
And it is configured as extending to the outside of the shell (110).
10. power inverter (100) according to claim 9, which is characterized in that further include multiple fuses (190), institute
State multiple fuses (190) be respectively coupled between the multiple pluggable connector (170) and the output end (141) with
And between the multiple pluggable connector (170) and the input terminal (142).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920454893.5U CN209659171U (en) | 2019-04-04 | 2019-04-04 | Power inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920454893.5U CN209659171U (en) | 2019-04-04 | 2019-04-04 | Power inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209659171U true CN209659171U (en) | 2019-11-19 |
Family
ID=68528916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920454893.5U Active CN209659171U (en) | 2019-04-04 | 2019-04-04 | Power inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209659171U (en) |
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2019
- 2019-04-04 CN CN201920454893.5U patent/CN209659171U/en active Active
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