CN203942472U - A kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses system - Google Patents
A kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses system Download PDFInfo
- Publication number
- CN203942472U CN203942472U CN201420394940.9U CN201420394940U CN203942472U CN 203942472 U CN203942472 U CN 203942472U CN 201420394940 U CN201420394940 U CN 201420394940U CN 203942472 U CN203942472 U CN 203942472U
- Authority
- CN
- China
- Prior art keywords
- power supply
- drive unit
- servo drive
- electro magnetic
- harmonic wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003112 inhibitor Substances 0.000 claims description 12
- 230000008054 signal transmission Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 9
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000007667 floating Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 230000003472 neutralizing effect Effects 0.000 description 3
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002547 anomalous effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000002996 emotional effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
A kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility of the utility model suppresses system, and it comprises: motor, ccd image sensor, power supply unit, servo drive unit and image-display units, and power supply unit is connected with the power input of servo drive unit; The output of servo drive unit is the driving signal transmssion line of output, and is connected with the signal input part of motor; The power input of image-display units is connected with power supply unit; The signal input part of image-display units is connected with the signal output part of ccd image sensor; Be arranged on the special longitudinal filter between power supply unit and servo drive unit.The utility model has been eliminated the interference of this strong interferers of servo-drive part to vision signal, has improved the Electro Magnetic Compatibility of electronic system.
Description
Technical field
The present invention relates to electromagnetic compatibility technology field, be specifically related to a kind of PWM (Pulse-Width Modulation, pulse width modulation) pulse harmonic wave that improves Electro Magnetic Compatibility and suppress technology.
Background technology
In shipborne optic-electronic countermeasure system, laser draws inclined to one side interference subsystem electronic system and mainly comprises servo-drive and image processing two parts.Wherein servo-drive part adopts pwm pulse type of drive to drive direct current machine, controls the rotation of Laser emission platform.Image processing section mainly comprises CCD (Charge Couple Device, charge coupled device) imageing sensor and image display device, is respectively used to Laser emission platform to carry out image taking and demonstration.
The fundamental frequency of the pwm power pulse signal of servo-drive part is KHz, but its rising and falling edges can produce abundant harmonic signal, and the high order harmonic component of these pulse signals is main interference sources of electronic system.The electromagnetic interference that PWM harmonic wave brings electronic system embodies both ways, interference to other sensitive circuit in electronic system on the one hand, electronic system exceeds the setting of RE102 (electromagnetic field radiation transmitting) to the interference strength of spatial emission on the other hand.Because the analog video signal amplitude in image processing section is lower, belong to easily disturbed sensitive signal, therefore the humorous wave interference of the PWM of servo-drive part easily causes video image to show interrupted interference stripes.
In order to address this problem, current method is to adopt video filter at video reception end, adopts filtering technique on process software, selects measures such as mixing earthing mode and multiple twin strip line to reduce the interference of electromagnetic radiation.
The PWM driving pulse frequency of servo-drive part is 25KHz, amplitude is 60V, and the frequency video signal of the ccd image sensor of image processing section has covered this scope of 25Hz～15MHz, and analog video signal amplitude is lower, crest voltage only has 1V～2V, belongs to easily disturbed sensitive signal.When motor-drive circuit work, the stronger frequency range of interference range is 150KHz～30MHz, and especially near 700KHz, pwm pulse harmonic energy is the strongest.Visible disturbance signal frequency range and vision signal (useful signal) frequency range has certain overlapping region, so take filtering method can filter a part of useful signal on video signal cable, therefore adopt that to suppress in this way the effect of the humorous wave interference of PWM unsatisfactory simultaneously.
Summary of the invention
The purpose of this utility model is to provide a kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility and suppresses system, this utility model can solve electromagnetic radiation in video interference problem and the certain frequency range that laser the draws inclined to one side interference subsystem electronic system problem that exceeds standard, thereby can solve the undesirable problem of effect that suppresses the humorous wave interference of PWM.
The utility model is achieved through the following technical solutions:
The utility model provides a kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility to suppress system, it comprises: motor, ccd image sensor, power supply unit, servo drive unit and image-display units, and power supply unit is connected with the power input of servo drive unit; The output of servo drive unit is the driving signal transmssion line of output, and is connected with the signal input part of motor; The power input of image-display units is connected with power supply unit; The signal input part of image-display units is connected with the signal output part of ccd image sensor; A kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility of stating suppresses system and also comprises:
Special longitudinal filter; This special longitudinal filter is arranged between power supply unit and servo drive unit.
Further, described special longitudinal filter comprises:
Resistance R 1, diode D1, resistance R 2, diode D2, longitudinal choke, special longitudinal filter input, power supply ground end GND, special longitudinal filter output, servo Power Groud end PGND; Described longitudinal choke comprises winding L 1, winding L 2, winding L 1 and the resistance R 1 of connecting, diode D1 parallel connection, and draw special longitudinal filter input and two pins of special longitudinal filter output; Special longitudinal filter input pin connects the output of power supply unit; Special longitudinal filter output pin connects the power input of servo drive unit; Winding L 1 and the resistance R 2 of connecting and diode D2 parallel connection, and draw power supply and hold GND and two pins of servo Power Groud end PGND, and ground connection.
Further, described a kind of pwm pulse harmonic wave inhibition system that improves Electro Magnetic Compatibility also comprises:
Bleeder resistance, this bleeder resistance is connected between the power ground end and the earth of servo drive unit.
Further, described a kind of pwm pulse harmonic wave inhibition system that improves Electro Magnetic Compatibility also comprises:
On the driving signal transmssion line of servo drive unit output, be provided with driving signal transmission unit, described driving signal transmission unit comprises the electromagnetic interference EMI inhibitor that adopts Ferrite Material.
Can be found out by above-mentioned the technical solution of the utility model, the utility model installs special longitudinal filter additional by the power input that draws the servo drive unit 7 on the circuit board of inclined to one side interference subsystem at laser, can suppress from the power line of interference source on the one hand the interference of PWM high-frequency harmonic; Can absorb issuable higher surge peak voltage on power line by special longitudinal filter on the other hand; to reduce the impulse current of Switching Power Supply to servo-drive part; the effectively components and parts on protective circuit plate, the power environment adaptability of raising servo-drive some work.
In addition, the utility model adopts and designs (entering bleeder resistance R3 in the power ground termination of servo drive unit) floatingly, can block the common impedance conducted interference causing that is coupled.
In addition, the utility model is by installing EMI inhibitor on the driving signal transmission unit arranging on driving signal transmssion line, in the time of low frequency, EMI inhibitor is mainly inductance characteristic, on line, loss is little, when high frequency, EMI inhibitor is mainly resistance characteristic, High-frequency Interference is absorbed to the also form of energy transform into heat energy and dissipate, therefore can suppress high frequency spike radiated interference.
Brief description of the drawings
Fig. 1 is composition frame chart of the present utility model;
Fig. 2 is special longitudinal filter composition frame chart;
Fig. 3 is floating ground design principle block diagram.
In accompanying drawing:
Localizer 1, motor 2, ccd image sensor 3, control rack 4, power supply unit 5, special longitudinal filter 6, servo drive unit 7, driving signal transmission unit 8, image-display units 9, driving signal transmssion line 10, image transmission line 11.
Embodiment
The utility model proposes a kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility and suppress system, it forms as shown in Figure 1, comprising:
Localizer 1, control rack 4, driving signal transmssion line 10 and image transmission line 11.Drive the two ends of signal transmssion line 10 to be connected respectively to the driving signal transmission port of localizer 1 and control rack 4; The two ends of image transmission line 11 are connected respectively to localizer 1 and control the image transmission port of rack 4.
Localizer 1 comprises motor 2 and ccd image sensor 3.Controlling rack 4 comprises: power supply unit 5, special longitudinal filter 6, servo drive unit 7, driving signal transmission unit 8, image-display units 9.
Power supply unit 5 is connected with the power input of servo drive unit 7; Between power supply unit 5 and servo drive unit 7, be provided with special longitudinal filter 6 (being the power input that special longitudinal filter 6 is arranged on servo drive unit 7); The output of servo drive unit 7 is the driving signal transmssion line of output; On the driving signal transmssion line of exporting at servo drive unit 7, be provided with and drive signal transmission unit 8, and be connected with the signal input part of the motor 2 in localizer 1;
The power input of image-display units 9 is connected with power supply unit 5; The signal input part of image-display units 9 is connected with the signal output part of ccd image sensor 3.
Operation principle of the present utility model is as follows:
Power supply unit 5 is that motor 2 and the ccd image sensor 3 of controlling in components and parts and localizer 1 all in rack 4 powered;
The motor 2 that is positioned at localizer 1 inside drives localizer 1 to be rotated under the signal driver of servo drive unit 7; The ccd image sensor 3 that is positioned at localizer 1 inside complete localizer 1 around certain area imaging and be back to the image-display units 9 of controlling rack 4; Servo drive unit 7 completes the generation of motor drive signal.
The composition frame chart of special longitudinal filter 6 as shown in Figure 2, comprising: resistance R 1, diode D1, resistance R 2, diode D2, longitudinal choke (claiming again neutralizing transformer), special longitudinal filter input+60V, power supply ground end GND, special longitudinal filter output+60VP, servo Power Groud end PGND.
Wherein longitudinal choke (claiming again neutralizing transformer) by two around forming to the winding identical, the number of turn is identical, as shown in the L1 in Fig. 2, L2.Winding L 1 and the resistance R 1 of connecting, diode D1 parallel connection, and draw two pins, be respectively special longitudinal filter input+60V and special longitudinal filter output+60VP.Wherein special longitudinal filter input+60V pin connects the output of power supply unit 5; Special longitudinal filter output+60VP pin connects the power input of servo drive unit 7; Winding L 1 and the resistance R 2 of connecting and diode D2 parallel connection, and draw two pins, be respectively power supply and hold GND and servo Power Groud end PGND, these two equal ground connection of pin.When design, the core section of longitudinal choke is long-pending should be enough, in order to avoid there is magnetic saturation phenomenon.L1, L2 inductance value scope of design are 60uH～120uH, and the frequency of the PWM in native system in servo-drive part is 25KHz, L1, L2 value 60uH.
This longitudinal choke (claiming again neutralizing transformer) is the core of special longitudinal filter, can pass through direct current or low frequency signal, and earth-return common mode disturbances electric current is presented to quite high impedance.Opposite direction when signal code or direct current composition flow through two windings of longitudinal choke, is called anomalous mode electric current, cancels out each other in the magnetic field of generation, and therefore this longitudinal choke does not play choking effect to signal code or direct current composition.And disturbance current in PGND ground wire is flowed through, the direction of two windings is identical, and the magnetic field of generation is strengthened mutually.So this longitudinal choke presents high impedance to earth-return disturbance current, suppress well the interference of earth-return.Frequency is higher, and longitudinal choke inductance L is larger, and the D.C. resistance of longitudinal choke is less, and the effect that longitudinal choke inhibition earth-return disturbs is better.
Diode D1, D2 play protection power circuit, and the energy storing in inductance coil during for power-off provides Releasing loop.
The driving signal transmission unit 8 arranging on the driving signal transmssion line of exporting at servo drive unit 7, EMI (Electromagnetic Interference, electromagnetic interference) the inhibitor 742-727-33 of employing Ferrite Material.Model is 742-727-33EMI inhibitor is 45 Ω left and right in 150KHz～30MHz scope internal impedance, can bring up to 10～15dB by the increase number of times signal insertion loss that winds the line.Therefore in low-frequency range, it presents low-down emotional resistance value to this EMI inhibitor, does not affect the transmission of useful signal and the normal work of circuit; But when inhibitor is during in high band operation, it can provide high impedance, and in the time having high-frequency energy to pass FERRITE CORE, high impedance will be that thermal energy consumption dissipates these Conversion of Energies, and high-frequency interferencing signal is significantly decayed.This inhibitor is better than common net resistance filter, and the latter can produce resonance, causes new interference, and FERRITE CORE does not have this phenomenon, and selected model can disturb source to suppress to drive the interference signal between the 150KHz～30MHz on signal transmssion line.
Power ground termination at servo drive unit 7 enters bleeder resistance R3, by access a bleeder resistance R3 between floating and the earth, the about 5.6M Ω of resistance value of this bleeder resistance R3, by the circuit ground end of servo drive unit 7 and other common reference isolate, can realize the common impedance coupling channel of blocking-up servo-drive part and image processing section, thereby can eliminate the danger of accumulation of static electricity (at circuit in completely floating ground in the situation that, after there is accumulation of static electricity and acquiring a certain degree, the danger that can produce static discharge).
In above-described embodiment, also can not comprise and drive signal transmission unit 8 and drive the EMI inhibitor arranging in signal transmission unit 8, but the effect that such embodiment suppresses interference signal compared with above-described embodiment is a bit weaker.
In above-described embodiment, the bleeder resistance R3 that also can enter not included in the power ground termination of servo drive unit 7, but such embodiment does not have above-described embodiment to eliminate the effective of accumulation of static electricity.
Specific embodiments by the invention described above can be found out, components and parts and the floating ground designing technique with low cost such as EMI inhibitor that utilization of the present invention comprises the special longitudinal filter 6 of resistance, diode, longitudinal choke and makes of Ferrite Material, from conduction and radiation two aspects, from interference source and delivering path, take measures simultaneously, eliminate the interference of this strong interferers of servo-drive part to vision signal, improved the Electro Magnetic Compatibility of electronic system.The utility model also goes for the electronic system EMC Design field of containing impulse circuit of having relatively high expectations in high-frequency clock pulse circuit or signal edge.
Although the present invention with preferred embodiment openly as above, embodiment is not of the present invention for limiting.Without departing from the spirit and scope of the invention, any equivalence of doing changes or retouching, belongs to equally the present invention's protection range.Therefore protection scope of the present invention should be taking the application's the content that claim was defined as standard.
Claims (4)
1. the pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses a system, and it comprises: motor, ccd image sensor, power supply unit, servo drive unit and image-display units, and power supply unit is connected with the power input of servo drive unit; The output of servo drive unit is the driving signal transmssion line of output, and is connected with the signal input part of motor; The power input of image-display units is connected with power supply unit; The signal input part of image-display units is connected with the signal output part of ccd image sensor; It is characterized in that, described a kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses system and also comprises:
Special longitudinal filter; This special longitudinal filter is arranged between power supply unit and servo drive unit.
2. a kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility according to claim 1 suppresses system, it is characterized in that, described special longitudinal filter comprises:
Resistance R 1, diode D1, resistance R 2, diode D2, longitudinal choke, special longitudinal filter input, power supply ground end GND, special longitudinal filter output, servo Power Groud end PGND; Described longitudinal choke comprises winding L 1, winding L 2, winding L 1 and the resistance R 1 of connecting, diode D1 parallel connection, and draw special longitudinal filter input and two pins of special longitudinal filter output; Special longitudinal filter input pin connects the output of power supply unit; Special longitudinal filter output pin connects the power input of servo drive unit; Winding L 1 and the resistance R 2 of connecting and diode D2 parallel connection, and draw power supply and hold GND and two pins of servo Power Groud end PGND, and ground connection.
3. a kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility according to claim 1 and 2 suppresses system, it is characterized in that, described a kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses system and also comprises:
Bleeder resistance, this bleeder resistance is connected between the power ground end and the earth of servo drive unit.
4. a kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility according to claim 3 suppresses system, it is characterized in that, described a kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses system and also comprises:
On the driving signal transmssion line of servo drive unit output, be provided with driving signal transmission unit, described driving signal transmission unit comprises the electromagnetic interference EMI inhibitor that adopts Ferrite Material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394940.9U CN203942472U (en) | 2014-07-17 | 2014-07-17 | A kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394940.9U CN203942472U (en) | 2014-07-17 | 2014-07-17 | A kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203942472U true CN203942472U (en) | 2014-11-12 |
Family
ID=51861756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420394940.9U Expired - Lifetime CN203942472U (en) | 2014-07-17 | 2014-07-17 | A kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203942472U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194042A (en) * | 2018-08-28 | 2019-01-11 | 北京精密机电控制设备研究所 | A compact annular plate-type integrated motor driver |
| CN111431502A (en) * | 2020-03-31 | 2020-07-17 | 四川九八村信息科技有限公司 | System and method for electromagnetic compatibility prevention and control of analog signals |
| CN120642580A (en) * | 2023-02-14 | 2025-09-12 | 东京毅力科创株式会社 | Plasma processing apparatus |
-
2014
- 2014-07-17 CN CN201420394940.9U patent/CN203942472U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194042A (en) * | 2018-08-28 | 2019-01-11 | 北京精密机电控制设备研究所 | A compact annular plate-type integrated motor driver |
| CN111431502A (en) * | 2020-03-31 | 2020-07-17 | 四川九八村信息科技有限公司 | System and method for electromagnetic compatibility prevention and control of analog signals |
| CN120642580A (en) * | 2023-02-14 | 2025-09-12 | 东京毅力科创株式会社 | Plasma processing apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9603293B2 (en) | Noise-reducing shielded cable | |
| CN203942472U (en) | A kind of pwm pulse harmonic wave that improves Electro Magnetic Compatibility suppresses system | |
| CN204216790U (en) | A Programmable Scanning Power Supply | |
| EP3876401A1 (en) | Electronic control assembly and electric appliance | |
| CN202679197U (en) | DC permanent magnetism brush motor | |
| CN206041792U (en) | EMI filter | |
| US20120051012A1 (en) | Display device with noise shielding structure | |
| CN202855504U (en) | Modified sandwich winding transformer | |
| CN208539663U (en) | Reduce the circuit of wireless charging harmonic wave interference | |
| CN204442170U (en) | A kind of low EMI input circuit | |
| CN207301137U (en) | A kind of new transient electromagnetic method pulse current radiating circuit | |
| CN103391084B (en) | Drive circuit for high-pressure solid switch | |
| CN102983828A (en) | Filter of impulse power output port of motor speed controller | |
| CN105338769A (en) | Cabinet wiring box and electric appliance cabinet | |
| CN204741610U (en) | Prevent electromagnetic interference circuit board | |
| CN205070994U (en) | Power -line carrier communication system's terminal control unit | |
| CN106409485A (en) | Transformer | |
| CN208258122U (en) | A kind of electromagnetic heating apparatus | |
| TWM466422U (en) | Snubber circuit for switching mode power supply | |
| CN210137280U (en) | Ultra-thin drive power supply that is shaded in area | |
| CN108447649A (en) | A kind of common mode inductance preventing short circuit | |
| CN107482900A (en) | A kind of circuit for improving DC brushless motor EMC and the blower fan using the circuit | |
| CN201374641Y (en) | Anti-electromagnetic interference circuit structure of large-screen liquid crystal television | |
| CN101986543A (en) | Electromagnetic conduction and radiation shielding device for switching power supply | |
| CN101420842B (en) | Electrical equipment that reduces radiation from power lines |
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: 20141112 |