CN207198574U - Electromagnetism interference control system - Google Patents
Electromagnetism interference control system Download PDFInfo
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- CN207198574U CN207198574U CN201720883044.2U CN201720883044U CN207198574U CN 207198574 U CN207198574 U CN 207198574U CN 201720883044 U CN201720883044 U CN 201720883044U CN 207198574 U CN207198574 U CN 207198574U
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- control system
- electromagnetic interference
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Abstract
The utility model electromagnetism interference control system, including：Switching Power Supply, isolating transformer, control unit, frequency converter, control terminal motor；Suppression electromagnetic interference filtering device one is provided between isolating transformer and control unit；Suppression electromagnetic interference filtering device two is provided between frequency converter and control terminal motor；Connected between above-mentioned each device by shielded cable；The electromagnetism interference set-up of control system is in shielding box body.The utility model is many-sided to the comprehensive electromagnetism interference of system progress by suppression electromagnetic interference filtering device, isolating transformer, shielded cable, shielding box body and filtration module etc., prevent influence of the electromagnetic interference to control system, Guarantee control system normally can accurately be run, and improve the accuracy of control system.
Description
Technical field
It the utility model is related to electromagnetic arts, and in particular to a kind of electromagnetism interference control system.
Background technology
Electromagnetic interference, English name ElectroMagneticInterference, abbreviation EMI, refer to any conducting
Or the performance that can reduce some device, equipment or system is produced in the presence of having electromagnetic field along with voltage, electric current, also
It is possible to produce dysgenic electromagnet phenomenon to biology or material.
Electromagnetic interference can be divided into two kinds of Conduction Interference and radiation interference.Conduction Interference is referred to using conducting medium one
Signal coupling (interference) on individual electric network is into another electric network.And radiation interference refers to interference source by space it
Signal couples (interference) to another electric network.In the PCB of high speed and system design, high-frequency signal line, integrated circuit
Pin, all kinds of connectors etc. be likely to become the radiation interference source with antenna performance, electromagnetic wave can be launched and influenceed
The normal work of other subsystems in other systems or inside the system.
The generation of any electromagnetic interference all certainly exists transmission and the delivering path (or transmission channel) of interfering energy.Generally
Think that electromagnetic interference transmission has two ways：One kind is conduction transmission mode；Another kind is radiation transmission mode.Conduction transmission must
There must be complete circuit to connect between interference source and sensor, interference signal is delivered to sensor along this connection circuit,
Generation interference phenomenon.This transmission circuit may include wire, and the conductive member of equipment, power supply, common impedance, ground connection are flat
Plate, resistance, inductance, electric capacity and mutual-inductance element etc..Radiation transmission is propagated in the form of an electromagnetic wave by medium, and interfering energy is pressed
The rule of electromagnetic field is launched to surrounding space.
Existing control system, generally include Switching Power Supply, controller, control terminal device and also be used to gather including some
The harvester of signal；Such as：In order to control humiture, controller can be transmitted to by Temperature Humidity Sensor collection data of the Temperature and Humidity module,
The blower fan of controller control control terminal or the rotating speed of compressor realize the control of humiture, in order to realize blower fan or compressor
The control of rotating speed, it will usually connect frequency converter between the motor and controller of blower fan；Again for example, in order to control the stream of liquid
Amount, the flow reality of controller, controller control electromagnetic flow valve or liquid pump can be transferred to by flow sensor collection flow value
The control of existing liquid cold flow, generally also can set frequency converter between the motor and controller of liquid pump.The driving process of frequency converter
In often produce electromagnetic interference.
In addition, can also produce electromagnetic interference in Switching Power Supply, signals transmission, electromagnetic interference can influence other instruments
Use, so as to influence the operation of whole control system.
Documents 1：CN204482220U discloses a kind of anti-electromagneticinterference interference system, for bulk curing barn in-line power with
And electrical control, including：Power module, main control unit module, human-computer interaction module, I/O unit modules and frequency-converter power conversion
Module, the power module connect the main control unit module and the frequency-converter power modular converter respectively；The main control unit
Module connects the human-computer interaction module and the I/O unit modules respectively, and the main control unit module connects the frequency conversion
Power conversion module；The frequency-converter power modular converter connects electric network source and circulating fan respectively；Also include：Input magnet ring,
Export magnet ring；The input magnet ring is connected between electric network source and the frequency-converter power modular converter；The output magnet ring string
It is associated between the circulating fan and the frequency-converter power modular converter.The anti-electromagneticinterference interference system is mainly used in bulk curing barn
Portion powers and electrical control, although by setting input magnet ring and output magnet ring to produce electromagnetic interference to resist frequency converter,
Caused electromagnetic interference still can impact to the electrical control of bulk curing barn in Switching Power Supply and signals transmission, so as to
Influence the normal operation of barn.
Documents 2：CN106413370A discloses a kind of Phototube Coupling shielding box, system and the side of anti-strong electromagnetic
Method, the system include：A kind of shielding box of Phototube Coupling, the shielding box include：It is shaped as the housing of cuboid and covers
The cover plate of housing；The housing is integrally milled out by metal aluminium, and several apertures are outputed on housing, and optical fiber is worn from the aperture
Cross.
Therefore, research and development one kind can prevent electromagnetic interference comprehensively, the electromagnetism interference for enabling control system normally accurately to run
Control system and its necessity.
Utility model content
The technical problems to be solved in the utility model, which is to provide one kind, can prevent electromagnetic interference comprehensively, enable control system just
The electromagnetism interference control system often accurately run.
In order to solve the above-mentioned technical problem, the utility model uses following technical scheme：
A kind of electromagnetism interference control system is provided, including：
Switching Power Supply, control unit, control terminal motor, set between the Switching Power Supply and control unit and isolate transformation
Device；Frequency converter is set between described control unit and control terminal motor；
In order to prevent interference caused by frequency converter, suppression electromagnetic interference is set to filter between isolating transformer and control unit
Wave device one；Suppression electromagnetic interference filtering device two is set between frequency converter and control terminal motor simultaneously；
Pass through shielded cable between above-mentioned Switching Power Supply, isolating transformer, control unit, frequency converter, control terminal motor
Connection；The shielded cable come out from isolating transformer is wrapped on suppression electromagnetic interference filtering device one, and its rear end is connected to control
Unit processed；The shielded cable come out from frequency converter is wrapped on suppression electromagnetic interference filtering device two, and its rear end is connected to control
Terminal motor；
The electromagnetism interference set-up of control system is in shielding box body.
Further,
The shielding box body includes rectangular housing, and the outer wall of the housing is used by two layers of anti-electromagnetic interference shielding layer and set
Put the sandwich of the aluminium layer or irony layer composition between two layers of anti-electromagnetic interference shielding layer.
Further,
The shielded cable uses the twisted-pair feeder of double shield.
Further,
Described control unit includes filtration module, and the program that filtration module is set can play filter action to control system.
Further,
The suppression electromagnetic interference filtering device one and suppression electromagnetic interference filtering device two are nickel-zinc ferrite or manganese
Zn ferrite.
Further,
It is described to control terminal motor as blower fan or the motor of compressor, the motor of liquid pump, the motor of lifting device, transmission dress
The motor put.
Further,
The electromagnetism interference control system also includes the harvester that is connected with control unit, and the harvester can be with
For various kinds of sensors, Temperature Humidity Sensor, displacement transducer, luminosity sensor, flow sensor are specifically included.
Electromagnetism interference control system provided by the utility model, before Switching Power Supply Access Control unit, become by isolation
Depressor is filtered to electromagnetic interference caused by power supply, while isolating transformer can also play a part of lightning protection；Power supply is believed
Number also it is filtered before Access Control unit by suppression electromagnetic interference filtering device one, the signal of harvester collection is defeated
Enter to also pass through suppression electromagnetic interference filtering device one before control unit and be filtered, the signal of control unit output exists through frequency converter
Before input control terminal motor, then it is filtered by suppression electromagnetic interference filtering device two, prevents control of the frequency converter to output
Interference caused by signal processed；Meanwhile be all attached between the Each part of whole system using shielded cable, to being transmitted across
Caused electromagnetic interference is filtered in journey；Finally also by whole set-up of control system in shielding box body, shielding box body uses
The folder of two layers of anti-electromagnetic interference shielding layer and the aluminium layer being arranged between two layers of anti-electromagnetic interference shielding layer or irony layer composition
Rotating fields, the electromagnetic wave that on the one hand can be shielded in external environment disturb to caused by system, on the other hand, can also prevent from controlling
The electromagnetic wave of system pollutes to external environment.In addition, also by setting filtration module in control unit, pass through software journey
The setting of sequence is also filtered to electromagnetic wave, reduces the influence of electromagnetic interference.
The utility model passes through suppression electromagnetic interference filtering device, isolating transformer, shielded cable, shielding box body and filtering
Module etc. is many-sided to carry out comprehensive electromagnetism interference to system, prevents influence of the electromagnetic interference to control system, ensures control system
System normally can accurately be run, and improve the accuracy of control system.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the overall structure diagram of the utility model embodiment electromagnetism interference control system；
Fig. 2 is the sandwich schematic diagram of the box body outer wall of the utility model embodiment；
Above-mentioned reference：
Switching Power Supply 1；Isolating transformer 2；Control unit 3；Frequency converter 4；Control terminal motor 5；Suppression electromagnetic interference is filtered
Wave device 1；Suppression electromagnetic interference filtering device 27；Harvester 8；Irony layer (aluminium layer) 91；Anti-electromagnetic interference shielding layer
92。
Embodiment
Utility model is further illustrated with reference to embodiment and accompanying drawing, but is not limited to model of the present utility model
Enclose.
Embodiment 1
As shown in Figure 1, 2, the present embodiment provides a kind of electromagnetism interference control system, including：
Switching Power Supply 1, control unit 3, control terminal motor 5, set between Switching Power Supply 1 and control unit 3 and isolate change
Depressor 2；Frequency converter 4 is set between control unit 3 and control terminal motor 5；
In order to prevent being disturbed caused by frequency converter 4, suppression electromagnetic interference is set between isolating transformer 2 and control unit 3
Filtering device 1；Suppression electromagnetic interference filtering device 27 is set between frequency converter 4 and control terminal 5 simultaneously；
Pass through shielded cable between Switching Power Supply 1, isolating transformer 2, control unit 3, frequency converter 4, control terminal motor 5
Connection；The shielded cable come out from isolating transformer 2 is wrapped on suppression electromagnetic interference filtering device 1, and its rear end is connected to
Control unit 3；The shielded cable come out from frequency converter 4 is wrapped on suppression electromagnetic interference filtering device 27, and its rear end is connected to
Control terminal motor 5；
In the present embodiment, shielded cable uses the twisted-pair feeder of double shield；Suppression electromagnetic interference filtering device 1 and suppression
EMI FILTER part 27 can use nickel-zinc ferrite or manganese-zinc ferrite.
In order to be further filtered to control system, described control unit 3 also includes filtration module, and filtration module is set
Program can play filter action to control system.
The electromagnetism interference set-up of control system is in shielding box body；The box body includes rectangular housing, the housing
Outer wall use by two layers of anti-electromagnetic interference shielding layer 92 and the aluminium layer being arranged between two layers of anti-electromagnetic interference shielding layer 92
The sandwich that (or irony layer) 91 forms.Aluminium layer (or irony layer) 91 can also be arranged to other metal levels or alloy
Layer.
Further,
The control terminal motor 5 is blower fan or the motor of compressor, the motor of liquid pump, the motor of lifting device, transmission
The motor of device.
The electromagnetism interference control system also includes the harvester 8 being connected with control unit 3, suppression electromagnetic interference filter
Wave device 1 is arranged between harvester 8 and control unit 3；Harvester 8 can be various kinds of sensors, specifically include temperature
Humidity sensor, displacement transducer, luminosity sensor, flow sensor.
The electromagnetism interference control system that the present embodiment provides, before the Access Control unit 3 of Switching Power Supply 1, become by isolation
Depressor 2 is filtered to electromagnetic interference caused by power supply, while isolating transformer 2 can also play a part of lightning protection；Power supply
Signal is also filtered before Access Control unit 3 by suppression electromagnetic interference filtering device 1, the letter that harvester 8 gathers
Number also passing through suppression electromagnetic interference filtering device 1 before control unit 3 is inputted is filtered, the signal that control unit 3 exports
Through frequency converter 4 before input control terminal motor 5, then it is filtered by suppression electromagnetic interference filtering device 27, prevents frequency conversion
Device 4 disturbs to caused by the control signal of output；Meanwhile all carried out between the Each part of whole system using shielded cable
Connection, is filtered to caused electromagnetic interference in transmitting procedure；Finally also by whole set-up of control system in shielding box body,
Shielding box body is using two layers of anti-electromagnetic interference shielding layer 92 and the aluminium layer being arranged between two layers of anti-electromagnetic interference shielding layer 92
The sandwich that (or irony layer) 91 forms, the electromagnetic wave that on the one hand can be shielded in external environment disturb to caused by system,
On the other hand, also it can prevent the electromagnetic wave of control system from being polluted to external environment.In addition, also by control unit 3
Filtration module is set, also electromagnetic wave is filtered by the setting of software program, reduces the influence of electromagnetic interference.
The present embodiment by suppression electromagnetic interference filtering device (including suppression electromagnetic interference filtering device 1 and suppress electricity
Magnetic disturbance filtering device 2 is 7), isolating transformer 2, shielded cable, shielding box body and filtration module etc. is many-sided that system is carried out
Comprehensive electromagnetism interference, influence of the electromagnetic interference to control system is prevented, Guarantee control system normally can accurately be run, and be improved
The accuracy of control system.
The advantages of general principle of the present utility model, principal character and the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, the utility model can also on the premise of the spirit and scope of the utility model is not departed from
There are various changes and modifications, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model will
Protection domain is asked to be defined by appended claims and its equivalent.
Claims (7)
1. electromagnetism interference control system, it is characterised in that including：
Switching Power Supply, control unit, control terminal motor, isolating transformer is set between the Switching Power Supply and control unit；
Frequency converter is set between described control unit and control terminal motor；
Suppression electromagnetic interference filtering device one is provided between isolating transformer and control unit；Frequency converter and control terminal motor it
Between be provided with suppression electromagnetic interference filtering device two；
Connected between above-mentioned Switching Power Supply, isolating transformer, control unit, frequency converter, control terminal motor by shielded cable；
The shielded cable come out from isolating transformer is wrapped on suppression electromagnetic interference filtering device one, and it is single that its rear end is connected to control
Member；The shielded cable come out from frequency converter is wrapped on suppression electromagnetic interference filtering device two, and its rear end is connected to control terminal
Motor；
The electromagnetism interference set-up of control system is in shielding box body.
2. electromagnetism interference control system according to claim 1, it is characterised in that
The shielding box body includes rectangular housing, and the outer wall of the housing is used by two layers of anti-electromagnetic interference shielding layer and is arranged on
The sandwich of aluminium layer or irony layer composition between two layers of anti-electromagnetic interference shielding layer.
3. electromagnetism interference control system according to claim 1, it is characterised in that
The shielded cable uses the twisted-pair feeder of double shield.
4. electromagnetism interference control system according to claim 1, it is characterised in that
Described control unit includes being used for the filtration module for being filtered control system.
5. electromagnetism interference control system according to claim 1, it is characterised in that
The suppression electromagnetic interference filtering device one and suppression electromagnetic interference filtering device two are nickel-zinc ferrite or MnZn iron
Oxysome.
6. electromagnetism interference control system according to claim 1, it is characterised in that
It is described to control terminal motor as the motor of blower fan, the motor of compressor, the motor of liquid pump, the motor of lifting device, transmission
One kind in the motor of device.
7. electromagnetism interference control system according to claim 1, it is characterised in that
The electromagnetism interference control system also includes the harvester being connected with control unit, the suppression electromagnetic interference filtering
Device one is arranged between harvester and control unit；The harvester includes Temperature Humidity Sensor, displacement transducer, light
Spend sensor, flow sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720883044.2U CN207198574U (en) | 2017-07-20 | 2017-07-20 | Electromagnetism interference control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720883044.2U CN207198574U (en) | 2017-07-20 | 2017-07-20 | Electromagnetism interference control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207198574U true CN207198574U (en) | 2018-04-06 |
Family
ID=61797977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720883044.2U Active CN207198574U (en) | 2017-07-20 | 2017-07-20 | Electromagnetism interference control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207198574U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617194A (en) * | 2019-08-23 | 2019-12-27 | 泉州市熙西网络科技有限公司 | Electric compressor with function of preventing false operation caused by magnetic error interference |
| CN111542212A (en) * | 2020-04-15 | 2020-08-14 | 重庆弘骊祥科技有限公司 | Anti-interference method and device for generator set |
| CN111624384A (en) * | 2020-06-05 | 2020-09-04 | 深圳供电局有限公司 | Partial pressure monitoring anti-interference device |
-
2017
- 2017-07-20 CN CN201720883044.2U patent/CN207198574U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617194A (en) * | 2019-08-23 | 2019-12-27 | 泉州市熙西网络科技有限公司 | Electric compressor with function of preventing false operation caused by magnetic error interference |
| CN110617194B (en) * | 2019-08-23 | 2021-01-26 | 江西杰豹机电有限公司 | Electric compressor with function of preventing false operation caused by magnetic error interference |
| CN111542212A (en) * | 2020-04-15 | 2020-08-14 | 重庆弘骊祥科技有限公司 | Anti-interference method and device for generator set |
| CN111624384A (en) * | 2020-06-05 | 2020-09-04 | 深圳供电局有限公司 | Partial pressure monitoring anti-interference device |
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