CN203301224U - Control power supply device of voltage-type three-level frequency converter - Google Patents
Control power supply device of voltage-type three-level frequency converter Download PDFInfo
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- CN203301224U CN203301224U CN2013203015508U CN201320301550U CN203301224U CN 203301224 U CN203301224 U CN 203301224U CN 2013203015508 U CN2013203015508 U CN 2013203015508U CN 201320301550 U CN201320301550 U CN 201320301550U CN 203301224 U CN203301224 U CN 203301224U
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Abstract
The utility model discloses a control power supply device of a voltage-type three-level frequency converter, comprising a first switching power supply, a second switching power supply, a third switching power supply, a first rectifier bridge and a second rectifier bridge. A positive bus inlet end and a negative bus inlet end are respectively taken from a positive bus and a negative bus of direct-current buses of the three-level frequency converter; an alternating-current input wire inlet end of the third switching power supply is electrically connected with an external power supply; an output end I of the first switching power supply, an output end I of the second switching power supply and an output end of the third switching power supply are connected with an input end of the first rectifier bridge; an output end II of the first switching power supply and an output end II of the second switching power supply are connected with an input end of the second rectifier bridge; an output end of the first rectifier bridge is electrically connected with a control system of the voltage-type three-level frequency converter; and an output end of the second rectifier bridge is electrically connected with a driving plate of the voltage-type three-level frequency converter. The control power supply device of the voltage-type three-level frequency converter requires no external control power supply, is small in size and low in cost and improves the operation reliability of the frequency converter.
Description
Technical field
The utility model relates to a kind of voltage-type three-level converter and controls power supply device, belongs to the electric energy storage system technical field.
Background technology
The voltage-type three-level converter be in present industrial circle number of applications at most, the most general a kind of frequency converter, in voltage three level-type frequency converters, the power supply reliability of controlling power supply is most important for the stability work of whole frequency converter, the stable operation of voltage-type three-level converter need possess following condition: in the charged situation of main circuit of frequency converter, the power device drive plate also must be charged; Under the unexpected powering-off state of incoming power, need the pulse of guaranteed output device drive to be in "Off" state, therefore need in the case the power device driving pulse after completing "Off" state, to control power supply and just allow outage; In the situation that the incoming power fluctuation needs to guarantee to control the supply voltage ripple disable; The positive and negative busbar voltage of DC bus need guarantee that magnitude of voltage is consistent.
For realizing above function, the existing control Power supply mode that generally adopts is for using the pattern of " UPS+ Switching Power Supply " power supply, and not only system bulk is large for this powering mode, cost is high, and needs external control power supply, has increased the maintenance work of equipment.
Summary of the invention
For the problem that above-mentioned prior art exists, the utility model provides a kind of voltage-type three-level converter to control power supply device, and without external control power supply, volume is small and exquisite, cost is low, improve the frequency converter reliability of operation.
to achieve these goals, the technical solution adopted in the utility model is: a kind of voltage-type three-level converter is controlled power supply device, comprise the first Switching Power Supply, the second switch power supply, the 3rd Switching Power Supply, the first rectifier bridge and the second rectifier bridge, the first Switching Power Supply is connected in parallel between the positive bus-bar and midpoint potential of voltage-type three-level converter by positive bus-bar end of incoming cables and midpoint potential end of incoming cables, the second switch power supply is connected in parallel between the midpoint potential and negative busbar of voltage-type three-level converter by midpoint potential end of incoming cables and negative busbar end of incoming cables, the interchange input end of incoming cables of the 3rd Switching Power Supply is electrically connected to external power supply, the first Switching Power Supply I output, second switch power supply I output is connected with the input of the first rectifier bridge with the 3rd Switching Power Supply output, the first Switching Power Supply II output is connected with the input of the second rectifier bridge with second switch power supply II output, the output of the first rectifier bridge is electrically connected to voltage-type three-level converter control system, the output of the second rectifier bridge is electrically connected to voltage-type three-level converter drive plate.
Further, the first rectifier bridge and the second rectifier bridge can be three-phase commutation bridges, and the second rectifier bridge can be also single-phase rectification bridge.
Further, the first Switching Power Supply and second switch power supply are the wide cut Switching Power Supply.
The beneficial effects of the utility model are: control power acquisition with frequency converter self power supply and externally fed multiple power supplies standby supply power mode each other, realized that not only the control power supply takes conveniently, and improved the frequency converter reliability of operation; The pattern that employing is powered by " dc-link capacitance+Switching Power Supply " replacement " UPS+ Switching Power Supply ", reduced the control system volume and reduced the control system cost.
The accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
In figure: 1, the first Switching Power Supply, 2, the second switch power supply, the 3, the 3rd Switching Power Supply, 4, the first rectifier bridge, the 5, second rectifier bridge, 6, exchange the input end of incoming cables, 7, the 3rd Switching Power Supply output, 8, positive bus-bar end of incoming cables, 9, the negative busbar end of incoming cables, the 10, first Switching Power Supply I output, 11, the first Switching Power Supply II output, 12, second switch power supply I output, 13, second switch power supply II output, 14, the midpoint potential end of incoming cables.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
as shown in Figure 1, this voltage-type three-level converter is controlled power supply device, comprise the first Switching Power Supply 1, second switch power supply 2, the 3rd Switching Power Supply 3, the first rectifier bridge 4 and the second rectifier bridge 5, the first Switching Power Supply 1 is connected in parallel between the positive bus-bar and midpoint potential of voltage-type three-level converter by positive bus-bar end of incoming cables 8 and midpoint potential end of incoming cables 14, second switch power supply 2 is connected in parallel between the midpoint potential and negative busbar of voltage-type three-level converter by midpoint potential end of incoming cables 14 and negative busbar end of incoming cables 9, the interchange input end of incoming cables 6 of the 3rd Switching Power Supply 3 is electrically connected to external power supply, even in the situation that assurance the first Switching Power Supply 1 and second switch power supply 2 can not normally be exported, the control system power supply still can normally provide, the first Switching Power Supply I output 10, second switch power supply I output 12 is connected with the input of the first rectifier bridge 4 with the 3rd Switching Power Supply output 7, the first Switching Power Supply II output 11 is connected with the input of the second rectifier bridge 5 with second switch power supply II output 13, the output of the first rectifier bridge 4 is electrically connected to voltage-type three-level converter control system, the output of the second rectifier bridge 5 is electrically connected to voltage-type three-level converter drive plate.
Positive bus-bar end of incoming cables 8 and negative busbar end of incoming cables 9 connect respectively dc-link capacitance, and its advantage is, without external power supply and utilize the consumption of the load of Switching Power Supply to the bus electric energy, help DC bus-bar voltage neutral balance regulatory function.The first Switching Power Supply 1, second switch power supply 2 utilize the energy of dc-link capacitance, realization is in the situation that power supply outage suddenly, control power supply and can remain the stable output of certain hour, saved UPS, reduced the control system volume and reduced the control system cost.
The first rectifier bridge 4 and the second rectifier bridge 5 can be three-phase commutation bridges, and the second rectifier bridge 5 can be also single-phase rectification bridge, and its practical function is basically identical.The second rectifier bridge 5 uses the advantage of three-phase commutation bridge to be, can be by increasing Switching Power Supply, and alternating current input power supplying is taken from three-level converter subsidiary loop 220V power supply, increases by a standby control power supply in road.
The first Switching Power Supply 1 and second switch power supply 2 are two-way output wide cut Switching Power Supply.The wide cut Switching Power Supply is wide input voltage range with respect to its advantage of regular tap power supply, and when input terminal voltage changed greatly, output end power still can be stablized supply.
Embodiment: 1MW tri-level Flameproof and intrinsically safe frequency converters, the frequency converter busbar voltage is 1800VDC, the first Switching Power Supply 1 and second switch power supply 2 are selected (input 500-1400VDC; 24VDC, 15VDC two-way output) wide cut power supply, namely the actual input voltage of wide cut power supply is 900V, and the first Switching Power Supply 1 and second switch power supply 2 utilize the dc-link capacitance energy, in the situation that power supply outage suddenly also can realize controlling power supply and can stablize output.Simultaneously, in order to guarantee under the first Switching Power Supply 1 and second switch power supply 2 failure conditions, controlling power supply still can normal power supply, in the auxiliary control source side, has increased the 3rd Switching Power Supply 3(input 220VAC, output 24VDC); And standby each other in order to realize Switching Power Supply, selected the first rectifier bridge 4 to realize controlling power supply (24VDC) three roads standby each other, the second rectifier bridge 5 realizes that drive plate power supply (15VDC) two roads are standby each other; Namely the 24V output of the first Switching Power Supply 1 and second switch power supply 2 control power supply and the 3rd Switching Power Supply 3 three road 24V export simultaneously through the first rectifier bridge 4, realize that the electrical isolation of 24V power supply is standby each other, for control system provides the control power supply; The 15V output of the first Switching Power Supply 1 and second switch power supply 2 is controlled the power supply two-way and is exported simultaneously through the second rectifier bridge 5, realizes that the electrical isolation of 25V power supply is standby each other, for the power device drive plate provides the control power supply.
Claims (3)
1. a voltage-type three-level converter is controlled power supply device, it is characterized in that, comprise the first Switching Power Supply (1), second switch power supply (2), the 3rd Switching Power Supply (3), the first rectifier bridge (4) and the second rectifier bridge (5), the first Switching Power Supply (1) is connected in parallel between the positive bus-bar and midpoint potential of voltage-type three-level converter by positive bus-bar end of incoming cables (8) and midpoint potential end of incoming cables (14), second switch power supply (2) is connected in parallel between the midpoint potential and negative busbar of voltage-type three-level converter by midpoint potential end of incoming cables (14) and negative busbar end of incoming cables (9), the interchange input end of incoming cables (6) of the 3rd Switching Power Supply (3) is electrically connected to external power supply, the first Switching Power Supply I output (10), second switch power supply I output (12) is connected with the input of the first rectifier bridge (4) with the 3rd Switching Power Supply output (7), the first Switching Power Supply II output (11) is connected with the input of the second rectifier bridge (5) with second switch power supply II output (13), the output of the first rectifier bridge (4) is electrically connected to voltage-type three-level converter control system, the output of the second rectifier bridge (5) is electrically connected to voltage-type three-level converter drive plate.
2. a kind of voltage-type three-level converter according to claim 1 is controlled power supply device, it is characterized in that, described the first rectifier bridge (4) and the second rectifier bridge (5) can be three-phase commutation bridges, and the second rectifier bridge (5) can be also single-phase rectification bridge.
3. a kind of voltage-type three-level converter according to claim 1 is controlled power supply device, it is characterized in that, described the first Switching Power Supply (1) and second switch power supply (2) are the wide cut Switching Power Supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203015508U CN203301224U (en) | 2013-05-29 | 2013-05-29 | Control power supply device of voltage-type three-level frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203015508U CN203301224U (en) | 2013-05-29 | 2013-05-29 | Control power supply device of voltage-type three-level frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203301224U true CN203301224U (en) | 2013-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203015508U Expired - Lifetime CN203301224U (en) | 2013-05-29 | 2013-05-29 | Control power supply device of voltage-type three-level frequency converter |
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| Country | Link |
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| CN (1) | CN203301224U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366969A (en) * | 2020-11-02 | 2021-02-12 | 江苏国科智能电气有限公司 | NPC three-level converter control power supply system |
-
2013
- 2013-05-29 CN CN2013203015508U patent/CN203301224U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366969A (en) * | 2020-11-02 | 2021-02-12 | 江苏国科智能电气有限公司 | NPC three-level converter control power supply system |
| CN112366969B (en) * | 2020-11-02 | 2022-03-15 | 江苏国科智能电气有限公司 | NPC three-level converter control power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |