CN202978673U - Plug-in type high-voltage frequency-conversion speed regulation system - Google Patents
Plug-in type high-voltage frequency-conversion speed regulation system Download PDFInfo
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- CN202978673U CN202978673U CN 201220678813 CN201220678813U CN202978673U CN 202978673 U CN202978673 U CN 202978673U CN 201220678813 CN201220678813 CN 201220678813 CN 201220678813 U CN201220678813 U CN 201220678813U CN 202978673 U CN202978673 U CN 202978673U
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- plug
- frame body
- air inlet
- radiator
- power units
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Abstract
The utility model relates to a plug-in type high-voltage frequency-conversion speed regulation system comprising a frame body, a plurality of power units, a control unit and a radiator. The power units, the control unit and the radiator are arranged inside the frame body; each of the power units includes a rectifier bridge, an inverter bridge, and an electrolytic capacitor; and an air inlet is arranged on the frame body. Besides, the system is characterized in that the electrolytic capacitors are arranged at the air inlet of the frame body and specifically, are arranged between the air inlet of the frame body and the radiator. In addition, a plurality of groups of input terminals and output terminals are arranged on the frame body; the input terminals and the output terminals of the power units are respectively connected with the plurality of groups of input terminals and output terminals; and the input terminal and the output terminals have plug-in structures. According to the utility model, because the electrolytic capacitors are arranged at the air inlet, the natural wind passes through the electrolytic capacitors, the radiator, and an air channel successively to take away the heat and thus the fluid medium can be fully utilized to carry out heat exchange, thereby prolonging the service lives of the electrolytic capacitors and improving the reliability of the power units. Besides, the original copper bar connection mode is replaced with a plug-in connection mode to realize convenient maintenance of the power units, thereby enhancing the security of the work personnel.
Description
Technical field
The utility model relates to a kind of high-voltage variable-frequency and variable-speed system, particularly a kind of high-voltage variable-frequency and variable-speed system that the input of preposition and power cell, output adopt plug-in to connect with electrochemical capacitor.
Background technology
Variable-frequency control technique just obtains using more and more widely in various aspects such as China's electric power, metallurgy, petrochemical industry, municipal water supplies, and is bringing into play more and more important effect as a kind of efficient energy saving means.
Frequency conversion speed-adjusting system is divided into two kinds of low-voltage variable frequency governing system and high-voltage variable-frequency and variable-speed systems.No matter be high-voltage variable-frequency and variable-speed system, or the low-voltage variable frequency governing system is all by controlling turning on and off of semiconductor power device, power frequency supply is transformed to the adjustable electric energy of frequency, thereby controls the action of controlled device.
For high-voltage variable-frequency and variable-speed system, its important part is the power cell of several series connection.Power cell is the elementary cell that high-voltage variable-frequency and variable-speed system is realized transformation, frequency conversion output.Each power cell is all that electrochemical capacitor three parts by rectifier bridge, inverter bridge, connection rectifier bridge and inverter bridge consist of.Rectifier bridge becomes direct current with the AC rectification of outside; Then, through connecting electrochemical capacitor filtering and the energy storage of rectifier bridge and inverter bridge, export to inverter bridge, then be reverse into the alternating current of different frequency to controlled device by inverter bridge.
Due to more than the alternating current of high-voltage variable-frequency and variable-speed system output is generally 1000V, when frequency converter work, the electric current that flows through frequency converter was very large, and the heat of the inner generation of frequency converter can be very large.As everyone knows, in power cell, can be index decreased the useful life of electrochemical capacitor with the ambient temperature rising.Data show: every rising 10 degree of ambient temperature, reduce by half the useful life of electrochemical capacitor.
As shown in Figure 3, its inner electrochemical capacitor 6 of traditional power cell is arranged on the bottom in power cell, the below of radiator 9, and the shortcoming of this design is: the natural wind Main Current is crossed radiator 9, only have the distinguished and admirable electrochemical capacitor 6 of crossing seldom, the radiating effect of electrochemical capacitor 6 is bad!
In addition, input, the output of the power cell of traditional frequency conversion speed-adjusting system inside generally use the copper bar bolt type to connect.As shown in Figure 4, input copper bar 7 and the output copper bar 8 of frequency conversion speed-adjusting system inside all are placed on the power cell front end, and when the maintain and replace requirement was arranged, operating personnel unscrewed bolt, and power cell is unloaded from copper bar.There is certain risk in this mode of operation, dismantles also more time-consuming.
In a word, use copper bar and connect power cell, have following drawback:
1, be subject to the restriction of cross-sectional area due to the ampacity of copper bar, therefore when the power cell output current is larger, connect to be used in conjunction with the larger copper bar of volume with regard to needing larger space, this has enlarged the volume of power cell virtually;
2, in the field of present application of frequency converter, the working condition of most enterprises is all barely satisfactory, and surrounding environment and airborne dust are more serious, and in order to guarantee not affect the performance of frequency converter, this has just had higher requirement to the processing technology of copper bar;
3, user's maintain and replace power cell sometimes, because field working conditions is complicated, power cell inside is still possible charged, needs the manual dismounting of operating personnel during the maintain and replace power cell, have very large possibility can touch live part, this can give relevant operating personnel's cause danger.
The utility model content
In view of the foregoing, the purpose of this utility model is to provide and a kind ofly extends electrochemical capacitor useful life, is beneficial to the plug-in high-voltage variable-frequency and variable-speed system that preventive maintenance time was safeguarded and shortened to power cell.
For achieving the above object, the utility model is taked following technical scheme: a kind of plug-in high-voltage variable-frequency and variable-speed system, and it comprises: framework is arranged on several power cells, control unit and radiator in framework;
Each power cell comprises: rectifier bridge, inverter bridge, electrochemical capacitor;
Described framework is provided with air inlet; It is characterized in that:
Described electrochemical capacitor is arranged on the air inlet place of described framework, and described electrochemical capacitor is between the air inlet and radiator of framework.
Described framework is provided with some groups of inputs and output; The input of each power cell is connected with output with one group of described input respectively with output; Described input and output are the plug-in structure.
Described input and output are socket or plug.
The beneficial effects of the utility model are: the utility model is placed on electrochemical capacitor the position of air inlet, natural wind is first taken away heat through electrochemical capacitor → radiator → air channel, take away through electrochemical capacitor the heat that electrochemical capacitor produces compared with only having the small part natural wind in original structure, can more take full advantage of fluid media (medium) and carry out heat exchange, thereby extend the useful life of electrochemical capacitor and the reliability of power cell.In addition, original copper bar is connected design change the plug-in structure into, more be beneficial to the maintenance of power cell and shorten preventive maintenance time, improved simultaneously staff's fail safe.
Description of drawings
Fig. 1 is the placement location schematic diagram of the utility model electrochemical capacitor.
Fig. 2 is the schematic diagram that the utility model power cell input, output adopt plug-in to connect.
Fig. 3 is the placement location schematic diagram of electrochemical capacitor in prior art.
Fig. 4 is the schematic diagram that power cell input in prior art, output adopt copper bar to connect.
Embodiment
Below will structure of the present utility model and the technique effect being wanted to reach be described by reference to the accompanying drawings with specific embodiment, but selected embodiment is not to limit scope of the present utility model only for interpretation.
As shown in Figure 1 and Figure 2, the plug-in high-voltage variable-frequency and variable-speed system that the utility model provides comprises: framework 1 is arranged on several power cells, control unit and radiator 2 in framework 1.Each power cell comprises: rectifier bridge (not shown in FIG.), inverter bridge (not shown in FIG.), electrochemical capacitor 3.Framework 1 is provided with air inlet.
The difference of the utility model and conventional high-tension frequency conversion speed-adjusting system is: the utility model is arranged on the electrochemical capacitor 3 in power cell at the air inlet place of framework 1, and the front end of radiator 2 makes electrochemical capacitor 3 between the air inlet and radiator 2 of framework 1.
In addition, the utility model is provided with some groups of inputs 4 and output 5 on framework 1, and relative with the air inlet of framework 1, and the input of each power cell is connected with output 5 with one group of input 4 respectively with output.Preferably, this input 4 and output 5 are the plug-in structure, as socket, plug construction, are convenient to the attaching/detaching power cell.
The utility model is placed on power cell front portion, framework air inlet place with the electrochemical capacitor in power cell, this can make the natural wind electrochemical capacitor 3 of directly first flowing through flow through radiator 2 again and take away heat, can make like this temperature of electrochemical capacitor 3 that the decline of certain degree has been arranged, extend the life-span of electrochemical capacitor 3.Modularized design simultaneously can be installed better, be dismantled, and can save direct labor's time during batch production.In addition, power cell of the present utility model has been cancelled input copper bar 7 and output copper bar 8, is replaced by the device of plug-in structure, is placed on the power cell rear portion.The power cell integration more that becomes after redesign, structure are more tight reliable.Simultaneously, the powerful conductive capability of plug connector and the insulating properties of being connected make power cell can be more convenient, use neatly, install and connect, avoided excessive blocked up copper bar and the jockey that matches.Used the advantage of the device of plug-in structure to be:
1, simplified mounting means (no longer needing bolted) between power cell and cabinet;
2, facilitate detachable maintaining and the replacement of power cell;
3, have more reliable connected mode, range of application widely;
4, meet the standardization of GB, plug connector reliable product quality, stable performance, highly versatile.
Claims (3)
1. plug-in high-voltage variable-frequency and variable-speed system, it comprises: framework is arranged on several power cells, control unit and radiator in framework;
Each power cell comprises: rectifier bridge, inverter bridge, electrochemical capacitor;
Described framework is provided with air inlet; It is characterized in that:
Described electrochemical capacitor is arranged on the air inlet place of described framework, and described electrochemical capacitor is between the air inlet and radiator of framework.
2. plug-in high-voltage variable-frequency and variable-speed system according to claim 1, it is characterized in that: described framework is provided with some groups of inputs and output;
The input of each power cell is connected with output with one group of described input respectively with output;
Described input and output are the plug-in structure.
3. plug-in high-voltage variable-frequency and variable-speed system according to claim 2, it is characterized in that: described input and output are socket or plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678813 CN202978673U (en) | 2012-12-10 | 2012-12-10 | Plug-in type high-voltage frequency-conversion speed regulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678813 CN202978673U (en) | 2012-12-10 | 2012-12-10 | Plug-in type high-voltage frequency-conversion speed regulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202978673U true CN202978673U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220678813 Expired - Lifetime CN202978673U (en) | 2012-12-10 | 2012-12-10 | Plug-in type high-voltage frequency-conversion speed regulation system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202978673U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103702546A (en) * | 2013-12-10 | 2014-04-02 | 深圳市正弦电气股份有限公司 | Converter and radiating method |
-
2012
- 2012-12-10 CN CN 201220678813 patent/CN202978673U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103702546A (en) * | 2013-12-10 | 2014-04-02 | 深圳市正弦电气股份有限公司 | Converter and radiating method |
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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 |
Granted publication date: 20130605 |
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| CX01 | Expiry of patent term |