CN203352437U - Frequency converter cabinet capable of inhibiting electromagnetic interference - Google Patents
Frequency converter cabinet capable of inhibiting electromagnetic interference Download PDFInfo
- Publication number
- CN203352437U CN203352437U CN 201320404076 CN201320404076U CN203352437U CN 203352437 U CN203352437 U CN 203352437U CN 201320404076 CN201320404076 CN 201320404076 CN 201320404076 U CN201320404076 U CN 201320404076U CN 203352437 U CN203352437 U CN 203352437U
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- cabinet
- frequency converter
- electromagnetic interference
- cabinet body
- output cable
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Abstract
The utility model discloses a frequency converter cabinet capable of inhibiting electromagnetic interference. The frequency converter cabinet includes a cabinet body. The internal of the cabinet body is divided into an upper part and a lower part through separator plates. The upper part of the cabinet body is internally provided with a filter. The lower part of the cabinet body is internally provided with a frequency converter. The rear end of the cabinet body is also provided with a control chamber. The control chamber is internally provided with a controller and is separated from the cabinet body through the separator plates. The filter is connected with a power input wire. The controller and the frequency converter are connected with a mechanical device through an output cable. According to the frequency converter cabinet, different devices can be effectively designed in different regions according to the region principle of electromagnetic compatibility during the design of a cabinet body, and each region in the cabinet uses a metal ground plate for space isolation and has different requirements for noise emission and immunity.
Description
Technical field
The utility model relates to electric power and carries dispensing device, more particularly relates to a kind of frequency-charger cabinet that suppresses electromagnetic interference.
Background technology
In electrical network, exist a large amount of harmonic sources to adjust equipment, nonlinear load and lighting apparatus etc. as various rectifying installations, alternating current-direct current switchgear, electronic voltage.These loads all make voltage, the electric current in electrical network produce wave distortion, thereby miscellaneous equipment in electrical network are produced to the interference of harm.If the power supply of frequency converter is subject to from not adding processing after the interference of contaminated AC network, electric network noise will disturb frequency converter by the electric network source circuit.The interference of power supply mainly contains frequency converter: (1) overvoltage, under-voltage, instantaneous power-down; (2) surge, fall; (3) peak voltage pulse; (4) radio frequency interference.In various industrial control systems, along with being widely used of the power electronic equipments such as frequency converter, the electromagnetic interference (EMI) of system is day by day serious, and corresponding Anti-interference Design technology (being electromagnetic compatibility EMC) has become more and more important.The interference of frequency convertor system can directly cause the hardware damage of system sometimes, though sometimes can not damage the hardware of system, often makes the system program operation of microprocessor out of control, cause controlling malfunctioning, thereby cause equipment and production accident.Therefore, the antijamming capability and the reliability that how to improve system are important contents very important in the automation equipment development and application.
The utility model content
In order to address the above problem, the utility model provides a kind of inhibition electromagnetic interference frequency-charger cabinet, in the time of can effectively designing cabinet according to the regional principle of electromagnetic compatibility different facility plannings in different zones, in cabinet, each zone spatially isolates each zone with metal ground plate has different requirements to emission and the immunity to interference of noise.
The utility model specifically is achieved through the following technical solutions:
A kind of inhibition electromagnetic interference frequency-charger cabinet, comprise cabinet, by dividing plate, cabinet is divided into to upper and lower two parts in described cabinet, installing filter in part on cabinet, frequency converter is installed in part under cabinet, described cabinet rear end also is provided with control room, described control indoor location controller, and described control room is by dividing plate and cabinet isolation; Described filter connects electric power incoming line, and described controller and described frequency converter are by the output cable tool equipment that picks.
Described dividing plate is metal material, and passes through ground connection;
Described output cable is adopted as shielded type cable;
Described output cable passes from ferrite core, and the earth connection of described output cable is not through in described ferrite core.
The beneficial effect that the utility model produces: the utility model has power-supply filter by circuit supply inlet wire Lu Zhongzhuan, when output cable, adopt shielded type cable or ferrite core to reduce to greatest extent electromagnetic interference simultaneously, while designing cabinet in addition according to the regional principle of electromagnetic compatibility different facility plannings in different zones, in cabinet, each zone spatially isolates each zone with metal ground plate has different requirements to emission and the diamagnetic degree of disturbance of noise.
The accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the utility model protection.
Be illustrated in figure 1 structural representation of the present utility model, a kind of inhibition electromagnetic interference frequency-charger cabinet, comprise cabinet 1, by dividing plate 2, cabinet is divided into to upper and lower two parts in described cabinet 1, installing filter 5 in part on cabinet, install frequency converter 4 in part under cabinet, described cabinet rear end also is provided with control room 11, the interior installation controller 3 in described control room 11, described control room 11 is by dividing plate 2 and cabinet 1 isolation; Described filter 5 connects electric power incoming line 7, and described controller 3 and described frequency converter 4 are by the output cable 8 tool equipment 6 that picks.Described dividing plate is metal material, and by ground connection, described output cable 8 is adopted as shielded type cable, or output cable 8 passes from ferrite core, and the earth connection of described output cable 8 is through in described ferrite core.Wherein plant equipment 6 comprises motor 9 and the control panel 10 connected by the outlet cable respectively, drive work and the manipulation function of frequency conversion tank, while designing cabinet simultaneously according to the regional principle of electromagnetic compatibility different facility plannings in different zones, in cabinet, each zone spatially isolates each zone with metal ground plate has different requirements to emission and the diamagnetic degree of disturbance of noise.
The utility model needs the certain choosing of installing filter will select the input filter that meets frequency converter manufacturing firm standard, its output line should be short as far as possible, and separate with inlet wire and the motor cable of filter, prevent from forming coupling firing, common mistake is that filter inlet wire and outlet are through in same sleeve pipe.If without the power circuit be connected with other electric equipment, filter should be as far as possible near frequency converter, and connects with shielded type cable in frequency converter control cabinet.Otherwise, such as the power line that ventilated machine is arranged in control cubicle, filter should be contained in the power import place of control cubicle.If many frequency converters are housed in control cubicle, the filter of every frequency converter should be as far as possible near frequency converter, and fill a total power-supply filter.
Holding wire can not parallel with the power line of unscreened motor cable or non-filtered in addition.The general rule of frequency converter wiring is as follows; When holding wire and power line distance is less than 300mm, both are less than lm by parallel length.When parallel length surpasses lm, both distances are at least more than 300mm.If parallel length surpasses 10m, both distances are answered proportional increase, and as parallel length is 40m, both should be distance: 40/10 * 0.3=1.2m.The distance of holding wire and frequency converter is 300mm at least, if hypotelorism should adopt the shielded signal line, but does not comprise the holding wire joined with frequency converter.The inverter input signal line will be used twisted-pair feeder or shielding conductor, can effectively weaken the interference that external electromagnetic field causes, input signal cable is answered the cross junction form with output forceful electric power line intersection, between both are upper and lower and parallel, the earthing mode of distance >=100mm frequency converter has multipoint earthing, one point earth and through several forms such as busbar groundings, to adopt as the case may be, note not because of imperfect earth, equipment being produced and disturbing.Frequency converter control cabinet should be equipped with the common ground bus, and the ground of power supply ground and other circuit all should connect the common ground end.The earth terminal of frequency converter itself can not be as the common ground end.In motor cable (quad), frequency converter and motor earth terminal should be received respectively in the two ends of ground wire.The control end of frequency converter and other circuit should be by the 0V terminal altogether.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. one kind is suppressed the electromagnetic interference frequency-charger cabinet, comprise cabinet, it is characterized in that, by dividing plate, cabinet is divided into to upper and lower two parts in described cabinet, installing filter in part on cabinet, install frequency converter in part under cabinet, described cabinet rear end also is provided with control room, described control indoor location controller, described control room is by dividing plate and cabinet isolation; Described filter connects electric power incoming line, and described controller and described frequency converter are by the output cable tool equipment that picks.
2. a kind of inhibition electromagnetic interference frequency-charger cabinet as claimed in claim 1, is characterized in that, described dividing plate is metal material, and passes through ground connection.
3. a kind of inhibition electromagnetic interference frequency-charger cabinet as claimed in claim 1, is characterized in that, described output cable is adopted as shielded type cable.
4. a kind of inhibition electromagnetic interference frequency-charger cabinet as claimed in claim 1, is characterized in that, described output cable passes from ferrite core.
5. a kind of inhibition electromagnetic interference frequency-charger cabinet as claimed in claim 4, is characterized in that, the earth connection of described output cable is not through in described ferrite core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320404076 CN203352437U (en) | 2013-07-08 | 2013-07-08 | Frequency converter cabinet capable of inhibiting electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320404076 CN203352437U (en) | 2013-07-08 | 2013-07-08 | Frequency converter cabinet capable of inhibiting electromagnetic interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203352437U true CN203352437U (en) | 2013-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320404076 Expired - Fee Related CN203352437U (en) | 2013-07-08 | 2013-07-08 | Frequency converter cabinet capable of inhibiting electromagnetic interference |
Country Status (1)
| Country | Link |
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| CN (1) | CN203352437U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113811105A (en) * | 2021-09-18 | 2021-12-17 | 济宁华源热电有限公司 | Electric automatization anti-electromagnetic interference switch board of steam power plant |
-
2013
- 2013-07-08 CN CN 201320404076 patent/CN203352437U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113811105A (en) * | 2021-09-18 | 2021-12-17 | 济宁华源热电有限公司 | Electric automatization anti-electromagnetic interference switch board of steam power plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20170708 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |