CN104459361B - The Ripple Noise detection method of Switching Power Supply and system - Google Patents
The Ripple Noise detection method of Switching Power Supply and system Download PDFInfo
- Publication number
- CN104459361B CN104459361B CN201410837105.2A CN201410837105A CN104459361B CN 104459361 B CN104459361 B CN 104459361B CN 201410837105 A CN201410837105 A CN 201410837105A CN 104459361 B CN104459361 B CN 104459361B
- Authority
- CN
- China
- Prior art keywords
- power supply
- field
- switching power
- magnetic field
- electric field
- 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.)
- Active
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention discloses a kind of Ripple Noise detection method of Switching Power Supply and system, methods described includes：Obtain Switching Power Supply carried out electric field that electromagnetic field near-field scan generated the electric-field intensity distribution information of scanning of a surface and magnetic field scanning of a surface magnetic field distribution information；Obtain the primary importance mark of the surface location residing for electric field that intensity in electric-field intensity distribution information is higher than electric field threshold value；Obtain the second position mark of the surface location residing for magnetic field that intensity in magnetic field distribution information is higher than magnetic field threshold value；According to the corresponding relation of scanning of a surface and each power supply unit interdigit of Switching Power Supply, searching the corresponding power supply position of primary importance mark is Ripple Noise voltage source position；According to the corresponding relation on surface sweeping surface and each power supply unit interdigit of Switching Power Supply, searching the corresponding power supply position of second position mark is Ripple Noise current source position.Implement the present invention, can detect that Ripple Noise voltage source and Ripple Noise current source in Switching Power Supply.
Description
【Technical field】
The present invention relates to the Ripple Noise detection method of electronic technology field, more particularly to Switching Power Supply and system.
【Background technology】
Switching Power Supply is compared linear power supply and is had many advantages, such as small volume, lightweight, high efficiency etc.；But carry therewith
Come is that electromagnetic interference is more relatively large, and these electromagnetic interference are presented as ripple and the noise exporting with input.Due to switch electricity
The special circuit structure in source itself, these ripples and noise often inevitably, claim on voltage when Ripple Noise occurs in
For Ripple Noise voltage, occur in and ripple current is then referred to as on electric current.Generally these Ripple Noise by the switching tube in circuit and
The devices such as rectifier tube, transformator produce, and pass through capacitive coupling and inductive coupled propagation.In so-called capacitive coupling mainly appears on
Portion's parasitic capacitance (electric capacity as between the electric capacity between device and radiator, transformator primary and secondary), and inductive coupled mainly appear on
Mutual inductance between the loops such as transformator primary and secondary or self-induction.However, these couplings will be determined in an actual switch power supply product
Close thus inferring that the source of Ripple Noise and propagation path are very difficult.
Generation with regard to ripple and noise and propagation analysis, can adopt the output voltage ripple of oscillograph direct measurement monitoring point
Shape is analyzed, by the oscillating impulse in voltage is analyzed with generation and the propagation condition of Ripple Noise.
But, the circuit during above-mentioned measuring method is worked by directly contact measures, and can disturb normal circuit operation.
【Content of the invention】
Based on this it is necessary to the circuit in being worked by directly contact for above-mentioned measuring method is measured, can disturb
The problem of normal circuit operation, provides Ripple Noise detection method and the system of a kind of Switching Power Supply.
A kind of Ripple Noise detection method of Switching Power Supply, comprises the following steps：
Obtain and the magnetic distribution information that electromagnetic field near-field scan is generated is carried out to the Switching Power Supply under default load, its
In, described magnetic distribution information includes electric field and scans second in the electric-field intensity distribution information of the first scanning of a surface and magnetic field
The magnetic field distribution information on surface；
Obtain first that intensity in described electric-field intensity distribution information is higher than the surface location residing for electric field of electric field threshold value
Put mark；
Obtain the second that intensity in described magnetic field distribution information is higher than the surface location residing for magnetic field of magnetic field threshold value
Put mark；
According to the corresponding relation of described first scanning of a surface and each power supply unit interdigit of described Switching Power Supply, search described the
Power supply position corresponding to one station location marker is Ripple Noise voltage source position；
According to the corresponding relation on described second surface sweeping surface and each power supply unit interdigit of described Switching Power Supply, search described the
Power supply position corresponding to two station location markers is Ripple Noise current source position.
A kind of Ripple Noise detecting system of Switching Power Supply, including：
Distributed intelligence acquisition module, carries out electromagnetic field near-field scan for acquisition to the Switching Power Supply under default load and is given birth to
The magnetic distribution information becoming, wherein, described magnetic distribution information includes electric field and divides in the electric field intensity of the first scanning of a surface
Cloth information and magnetic field are in the magnetic field distribution information of the second scanning of a surface；
First identifier acquisition module, for obtaining the electric field that intensity in described electric-field intensity distribution information is higher than electric field threshold value
The primary importance mark of residing surface location；
Second identifier acquisition module, for obtaining the magnetic field that intensity in described magnetic field distribution information is higher than magnetic field threshold value
The second position mark of residing surface location；
Ripple Noise voltage source determining module, for each power supply according to described first scanning of a surface and described Switching Power Supply
Corresponding relation between position, searches the corresponding power supply position of described primary importance mark in place for Ripple Noise voltage source institute
Put；
Ripple Noise current source determining module, for each power supply according to described second surface sweeping surface and described Switching Power Supply
Corresponding relation between position, searches the corresponding power supply position of described second position mark in place for Ripple Noise current source institute
Put.
The Ripple Noise detection method of above-mentioned Switching Power Supply and system, obtain and carry out electromagnetic field near-field scan to Switching Power Supply
The electric-field intensity distribution information being generated and magnetic field distribution information, then obtain the table residing for electric field that intensity is higher than electric field threshold value
The primary importance mark of face position and intensity identify higher than the second position of the surface location residing for magnetic field of magnetic field threshold value；According to sweeping
The corresponding relation retouching surface with Switching Power Supply searches the corresponding power supply position of described primary importance mark and the described second position
The corresponding power supply position of mark, can detect that Ripple Noise current source position and Ripple Noise voltage source in Switching Power Supply
Position, and then can detect that propagation path in Switching Power Supply for the Ripple Noise.
【Brief description】
Fig. 1 is the schematic flow sheet of the Ripple Noise detection method of Switching Power Supply of the present invention；
Fig. 2 be Switching Power Supply of the present invention Ripple Noise detection method in electromagnetic field near-field scan the first schematic diagram；
Fig. 3 be Switching Power Supply of the present invention Ripple Noise detection method in electromagnetic field near-field scan the second schematic diagram；
Fig. 4 is the structural representation of the Ripple Noise detecting system of Switching Power Supply of the present invention；
Fig. 5 be Switching Power Supply of the present invention Ripple Noise detection method in alternating magnetic field spectrogram；
After Fig. 6 is the Ripple Noise Fourier transformation of Ripple Noise detection method breaker in middle power supply of Switching Power Supply of the present invention
Spectrogram；
Fig. 7 be Switching Power Supply of the present invention Ripple Noise detection method in electromagnetic field intensity information distributing plan.
【Specific embodiment】
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
One step ground describes in detail.
Refer to Fig. 1, Fig. 1 is the schematic flow sheet of the Ripple Noise detection method of Switching Power Supply of the present invention.
The Ripple Noise detection method of the Switching Power Supply described in present embodiment, it may include following steps：
Step S101, obtains and carries out, to the Switching Power Supply under default load, the electromagnetic field that electromagnetic field near-field scan generated and divide
Cloth information, wherein, described magnetic distribution information includes electric field in the electric-field intensity distribution information of the first scanning of a surface and magnetic field
Magnetic field distribution information in the second scanning of a surface.
Step S102, obtains the surface location residing for electric field that intensity in described electric-field intensity distribution information is higher than electric field threshold value
Primary importance mark.
Step S103, obtains the surface location residing for magnetic field that intensity in described magnetic field distribution information is higher than magnetic field threshold value
The second position mark.
Step S104, according to the corresponding relation of described first scanning of a surface and each power supply unit interdigit of described Switching Power Supply,
Searching the corresponding power supply position of described primary importance mark is Ripple Noise voltage source position.
Step S105, according to the corresponding relation on described second surface sweeping surface and each power supply unit interdigit of described Switching Power Supply,
Searching the corresponding power supply position of described second position mark is Ripple Noise current source position.
Present embodiment, obtain Switching Power Supply carried out electric-field intensity distribution information that electromagnetic field near-field scan generated and
Magnetic field distribution information, then obtain primary importance mark and the intensity of the surface location residing for electric field that intensity is higher than electric field threshold value
Second position mark higher than surface location residing for the magnetic field of magnetic field threshold value；Corresponding relation according to scanning of a surface and Switching Power Supply
Search the power supply position corresponding to the corresponding power supply position of described primary importance mark and described second position mark, can detect
Ripple Noise current source position and Ripple Noise voltage source position in Switching Power Supply, and then can detect that ripple is made an uproar
Propagation path in Switching Power Supply for the sound.
Wherein, for step S101, described Switching Power Supply may preferably be plate level switch power module.Described default load
Including the load in electronic load or true environment, load can be fully loaded, semi-load and zero load etc..Switching Power Supply is necessarily being born
Carry work, the intensity of impact Ripple Noise and its spatial distribution.
Preferably, before Switching Power Supply is scanned with test, need to adjust its load according to test.If Switching Power Supply is
Metal Packaging, then break a seal Switching Power Supply, so that alternating electromagnetic field is directly to spatial emission, and by follow-up electromagnetic field near-field scan
Probe detection arrive.
In one embodiment, obtain and the electricity that electromagnetic field near-field scan is generated is carried out to the Switching Power Supply under default load
The first scanning of a surface magnetic field distribution information in the second scanning of a surface of electric-field intensity distribution information and magnetic field step
Suddenly comprise the following steps：
Popped one's head in first plane of scanning motion apart from surface first preset height of described Switching Power Supply by alternating electric field
Described Switching Power Supply is carried out with the near field electric field scanning of vertical direction, generates electricity on described first plane of scanning motion for the vertical electric field
Field intensity distributed intelligence.
Popped one's head in second plane of scanning motion apart from surface second preset height of described Switching Power Supply by alternating magnetic field
Described Switching Power Supply is carried out with the near field field scan of two horizontal directions, the horizontal component of electric field generating described two horizontal directions exists
Magnetic field distribution information on described first plane of scanning motion.
The present embodiment, can quickly and accurately detect electric field in the electric-field intensity distribution information of the first scanning of a surface and magnetic field
Magnetic field distribution information in the second scanning of a surface.
Preferably, described first preset height can be 1mm, as shown in Fig. 2 the distance between the surface of probe and Switching Power Supply
For 1mm, the direction of detected electric field is the direction of vertical scanning plane.Range of scanned frequencies is consistent with the frequency range of ripple,
Generally from 300kHz to 30MHz or wider.In other embodiments, described first preset height can be also other
Numerical value.If the structure of tested Switching Power Supply is more special, can be detected by horizontal alternating electric field.
Further, described second preset height can be 1mm, as shown in Fig. 2 probe and Switching Power Supply surface between away from
From for 1mm, detected magnetic direction is the horizontal X direction of the plane of scanning motion and horizontal Y-direction, obtain horizontal magnetic field X-component with
And intensity distributions on scanning of a surface for the Y-component, range of scanned frequencies is consistent with the frequency range of ripple, generally from 300kHz to
30MHz, or wider.In other embodiments, described second preset height can be also other numerical value.
Further it is also possible to X-component and Y-component are merged the absolute value H=(H becoming in a planeX 2+HY 2
)1/2.
In another embodiment, generate electric-field intensity distribution information on described first plane of scanning motion for the vertical electric field
After step, further comprising the steps of：
Flat in the 3rd scanning of surface the 3rd preset height apart from described Switching Power Supply by horizontal alternating electric field probe
In face, described Switching Power Supply is carried out with the near field electric field scanning of horizontal direction, generates horizontal component of electric field on described 3rd plane of scanning motion
Electric-field intensity distribution information.
Preferably, described 3rd preset height can be 1mm, and the distance between the surface of probe and Switching Power Supply is 1mm, is visited
The direction surveying electric field is the direction of horizontal scan plane.Range of scanned frequencies is consistent with the frequency range of ripple, generally from
300kHz to 30MHz, or wider.In other embodiments, described 3rd preset height can be also other numerical value.
For step S102, distributing position in described first scanning of a surface for the electric field intensity can be corresponded to, preset each distribution
The station location marker of position.Described station location marker can be coordinate figure.Described electric field threshold value can be chosen at switch electricity in the plane of scanning motion
It is scanned outside source position detecting the background of gained.
For step S103, distributing position in described second scanning of a surface for the magnetic field intensity can be corresponded to, preset each distribution
The station location marker of position.Described station location marker can be coordinate figure.Described electric field threshold value can be chosen at switch electricity in the plane of scanning motion
It is scanned outside source position detecting the background of gained.
For step S104, each power supply of each position and described Switching Power Supply in described first scanning of a surface can be pre-build
Corresponding relation between position.
In one embodiment, the power supply position corresponding in lookup described primary importance mark is Ripple Noise voltage source
After the step of position, further comprising the steps of：
Opened to described respectively in the same surface location differing heights apart from described Switching Power Supply by alternating electric field probe
Close the near field electric field scanning that power supply carries out vertical direction, obtain the electric field intensity of each height corresponding.
Obtain the difference of the electric field intensity of corresponding any two height.
If described difference is in default electric field difference range, with the power supply position that described primary importance mark is corresponding it is
Ripple Noise voltage source position.
If it is not, then reacquire Switching Power Supply is carried out with electric field that electric field near-field scan generated in other surfaces position
Electric-field intensity distribution information.
The present embodiment, may further confirm that the accuracy of the Ripple Noise voltage source position detecting.Guarantee to detect
Accuracy.
Preferably, described height can be 1mm, 0.5mm, when Switching Power Supply each power supply position is not disposed on same surface,
Can verify that the impact highly to the electric field intensity of scanning for the near-field scan, if impact is in the reasonable scope, with same scan table
The position of face near-field scan gained electric-field intensity distribution infomation detection Ripple Noise voltage source.If impact is not in the reasonable scope,
Then correspond to each power supply position, obtain electric-field strength apart from each power pack mutually level different scanning surface near-field scan respectively
Degree distributed intelligence.
As shown in figure 3, the position that manually probe can be fixed to distance default power supply position differing heights carries out near field electricity
Field scanning.
For step S105, each power supply of each position and described Switching Power Supply in described second scanning of a surface can be pre-build
Corresponding relation between position.
In one embodiment, the power supply position corresponding in lookup described second position mark is Ripple Noise current source
After the step of position, further comprising the steps of：
Opened to described respectively in the same surface location differing heights apart from described Switching Power Supply by alternating magnetic field probe
Close the near field field scan that power supply carries out two horizontal directions, obtain the magnetic field intensity of each height corresponding；
Obtain the difference of the magnetic field intensity of corresponding any two height；
If described difference is in the range of the difference of default magnetic field, with the power supply position that described second position mark is corresponding it is
Ripple Noise current source position；
If it is not, then reacquire Switching Power Supply is carried out with magnetic field that magnetic field near-field scan generated in other surfaces position
Magnetic field distribution information.
The present embodiment, may further confirm that the accuracy of the Ripple Noise current source position detecting.Guarantee to detect
Accuracy.
Preferably, described height can be 1mm, 0.5mm, when Switching Power Supply each power supply position is not disposed on same surface,
Can verify that the impact highly to the magnetic field intensity of scanning for the near-field scan, if impact is in the reasonable scope, with same scan table
The position of face near-field scan gained magnetic field distribution infomation detection Ripple Noise voltage source.If impact is not in the reasonable scope,
Then correspond to each power supply position, obtain magnetic field intensity apart from the identical high different scanning surface near-field scan of each power pack respectively
Distributed intelligence.
Further, stricture of vagina can be obtained according to Ripple Noise current source position and Ripple Noise voltage source position
Ripple noise propagation path in circuit.
As shown in figure 3, the position that manually probe can be fixed to distance default power supply position differing heights carries out near field magnetic
Field scanning.
Refer to Fig. 4, Fig. 4 is the structural representation of the Ripple Noise detecting system of Switching Power Supply of the present invention.
The Ripple Noise detecting system of the Switching Power Supply described in present embodiment, it may include distributed intelligence acquisition module 100,
First identifier acquisition module 200, the second identifier acquisition module 300, Ripple Noise voltage source determining module 400 and Ripple Noise electricity
Stream source determining module 500, wherein：
Distributed intelligence acquisition module 100, carries out electromagnetic field near-field scan for obtaining to the Switching Power Supply under default load
The magnetic distribution information being generated, wherein, described magnetic distribution information includes the electric-field strength in the first scanning of a surface for the electric field
Spend the distributed intelligence and magnetic field magnetic field distribution information in the second scanning of a surface.
First identifier acquisition module 200, is higher than electric field threshold value for obtaining intensity in described electric-field intensity distribution information
The primary importance mark of surface location residing for electric field.
Second identifier acquisition module 300, is higher than magnetic field threshold value for obtaining intensity in described magnetic field distribution information
The second position mark of surface location residing for magnetic field.
Ripple Noise voltage source determining module 400, for each according to described first scanning of a surface and described Switching Power Supply
The corresponding relation of power supply unit interdigit, searches the corresponding power supply position of described primary importance mark and is located for Ripple Noise voltage source
Position.
Ripple Noise current source determining module 500, for each according to described second surface sweeping surface and described Switching Power Supply
The corresponding relation of power supply unit interdigit, searches the corresponding power supply position of described second position mark and is located for Ripple Noise current source
Position.
Present embodiment, obtain Switching Power Supply carried out electric-field intensity distribution information that electromagnetic field near-field scan generated and
Magnetic field distribution information, then obtain primary importance mark and the intensity of the surface location residing for electric field that intensity is higher than electric field threshold value
Second position mark higher than surface location residing for the magnetic field of magnetic field threshold value；Corresponding relation according to scanning of a surface and Switching Power Supply
Search the power supply position corresponding to the corresponding power supply position of described primary importance mark and described second position mark, can detect
Ripple Noise current source position and Ripple Noise voltage source position in Switching Power Supply, and then can detect that ripple is made an uproar
Propagation path in Switching Power Supply for the sound.
Wherein, for distributed intelligence acquisition module 100, described Switching Power Supply may preferably be plate level switch power module.
Described default load includes the load in electronic load or true environment, and load can be fully loaded, semi-load and zero load etc..So that switch
Power supply, in certain loaded work piece, affects intensity and its spatial distribution of Ripple Noise.
Preferably, before Switching Power Supply is scanned with test, need to adjust its load according to test.If Switching Power Supply is
Metal Packaging, then break a seal Switching Power Supply, so that alternating electromagnetic field is directly to spatial emission, and by follow-up electromagnetic field near-field scan
Probe detection arrive.
In one embodiment, distributed intelligence acquisition module 100 may also include Electric Field Distribution data obtaining module and magnetic field
Distributed intelligence acquisition module, wherein：
Described Electric Field Distribution data obtaining module is used for popping one's head on the surface apart from described Switching Power Supply by alternating electric field
In first plane of scanning motion of the first preset height, described Switching Power Supply is carried out with the near field electric field scanning of vertical direction, generates vertical
Electric-field intensity distribution information on described first plane of scanning motion for the electric field；
Described Distribution of Magnetic Field data obtaining module is used for popping one's head on the surface apart from described Switching Power Supply by alternating magnetic field
In second plane of scanning motion of the second preset height, described Switching Power Supply is carried out with the near field field scan of two horizontal directions, generates
Magnetic field distribution information on described first plane of scanning motion for the horizontal component of electric field of described two horizontal directions.
The present embodiment, can quickly and accurately detect electric field in the electric-field intensity distribution information of the first scanning of a surface and magnetic field
Magnetic field distribution information in the second scanning of a surface.
Preferably, described first preset height can be 1mm, as shown in Fig. 2 the distance between the surface of probe and Switching Power Supply
For 1mm, the direction of detected electric field is the direction of vertical scanning plane.Range of scanned frequencies is consistent with the frequency range of ripple,
Generally from 300kHz to 30MHz or wider.In other embodiments, described first preset height can be also other
Numerical value.If the structure of tested Switching Power Supply is more special, can be detected by horizontal alternating electric field.
Further, described second preset height can be 1mm, as shown in Fig. 2 probe and Switching Power Supply surface between away from
From for 1mm, detected magnetic direction is the horizontal X direction of the plane of scanning motion and horizontal Y-direction, obtain horizontal magnetic field X-component with
And intensity distributions on scanning of a surface for the Y-component, range of scanned frequencies is consistent with the frequency range of ripple, generally from 300kHz to
30MHz, or wider.In other embodiments, described second preset height can be also other numerical value.
Further it is also possible to X-component and Y-component are merged the absolute value H=(H becoming in a planeX 2+HY 2
)1/2.
In another embodiment, distributed intelligence acquisition module 100 may also include horizontal component of electric field distributed intelligence acquisition module,
For being popped one's head in the 3rd plane of scanning motion apart from surface the 3rd preset height of described Switching Power Supply by horizontal alternating electric field
Described Switching Power Supply is carried out with the near field electric field scanning of horizontal direction, generates electricity on described 3rd plane of scanning motion for the horizontal component of electric field
Field intensity distributed intelligence.
Preferably, described 3rd preset height can be 1mm, and the distance between the surface of probe and Switching Power Supply is 1mm, is visited
The direction surveying electric field is the direction of horizontal scan plane.Range of scanned frequencies is consistent with the frequency range of ripple, generally from
300kHz to 30MHz, or wider.In other embodiments, described 3rd preset height can be also other numerical value.
For the first identifier acquisition module 200, distributing position in described first scanning of a surface for the electric field intensity can be corresponded to,
Preset the station location marker of each distributing position.Described electric field threshold value is carried out outside being chosen at Switching Power Supply position in the plane of scanning motion
The background of Scanning Detction gained.
For the second identifier acquisition module 300, distributing position in described second scanning of a surface for the magnetic field intensity can be corresponded to,
Preset the station location marker of each distributing position.Described electric field threshold value is carried out outside being chosen at Switching Power Supply position in the plane of scanning motion
The background of Scanning Detction gained.For Ripple Noise voltage source determining module 400, can pre-build in described first scanning of a surface
The corresponding relation of each power supply unit interdigit of each position and described Switching Power Supply.
In one embodiment, the Ripple Noise detecting system of Switching Power Supply of the present invention may also include electric field intensity and obtains mould
Block, the first difference block and the first anticipation module, wherein：
Described electric field intensity acquisition module is used for popping one's head on the same surface apart from described Switching Power Supply by alternating electric field
Position differing heights carry out the near field electric field scanning of vertical direction respectively to described Switching Power Supply, obtain the electricity of each height corresponding
Field intensity.
Described first difference block is used for obtaining the difference of the electric field intensity of corresponding any two height.
Described first anticipation module is used for, when described difference is in default electric field difference range, notifying described Ripple Noise
Voltage source determining module is with the corresponding power supply position of described primary importance mark for Ripple Noise voltage source position.
Described first anticipation module is additionally operable to, when described difference is not in default electric field difference range, notify described distribution
Data obtaining module reacquires electricity Switching Power Supply being carried out with electric field that electric field near-field scan generated in other surfaces position
Field intensity distributed intelligence.
The present embodiment, may further confirm that the accuracy of the Ripple Noise voltage source position detecting.Guarantee to detect
Accuracy.
Preferably, described height can be 1mm, 0.5mm, when Switching Power Supply each power supply position is not disposed on same surface,
Can verify that the impact highly to the electric field intensity of scanning for the near-field scan, if impact is in the reasonable scope, with same scan table
The position of face near-field scan gained electric-field intensity distribution infomation detection Ripple Noise voltage source.If impact is not in the reasonable scope,
Then correspond to each power supply position, obtain electric field intensity apart from the identical high different scanning surface near-field scan of each power pack respectively
Distributed intelligence.
As shown in figure 3, the position that manually probe can be fixed to distance default power supply position differing heights carries out near field electricity
Field scanning.
For Ripple Noise current source determining module 500, each position and institute in described second scanning of a surface can be pre-build
State the corresponding relation of each power supply unit interdigit of Switching Power Supply.
In one embodiment, magnetic field intensity acquisition module, the second difference block and the second anticipation module are also included, its
In：
Described magnetic field intensity acquisition module is used for popping one's head on the same surface apart from described Switching Power Supply by alternating magnetic field
Position differing heights carry out the near field field scan of two horizontal directions respectively to described Switching Power Supply, obtain each height corresponding
Magnetic field intensity.
Described second difference block is used for obtaining the difference of the magnetic field intensity of corresponding any two height.
Described second anticipation module is used for, when described difference is in the range of the difference of default magnetic field, notifying described Ripple Noise
Current source determining module is with the corresponding power supply position of described primary importance mark for Ripple Noise voltage source position.
Described two anticipation modules are additionally operable to, when described difference is not in default electric field difference range, notify described distribution letter
Breath acquisition module reacquires magnetic field Switching Power Supply being carried out with magnetic field that magnetic field near-field scan generated in other surfaces position
Strength distributing information.
The present embodiment, may further confirm that the accuracy of the Ripple Noise current source position detecting.Guarantee to detect
Accuracy.
Preferably, described height can be 1mm, 0.5mm, when Switching Power Supply each power supply position is not disposed on same surface,
Can verify that the impact highly to the magnetic field intensity of scanning for the near-field scan, if impact is in the reasonable scope, with same scan table
The position of face near-field scan gained magnetic field distribution infomation detection Ripple Noise voltage source.If impact is not in the reasonable scope,
Then correspond to each power supply position, respectively strong apart from each power pack mutually level different scanning surface near-field scan acquisition magnetic field
Degree distributed intelligence.
As shown in figure 3, the position that manually probe can be fixed to distance default power supply position differing heights carries out near field magnetic
Field scanning.
The present invention can be by including probe, space mobile platform, micro-photographing apparatus, signal analysis device and computer
Electromagnetic field near-field scan device carries out electromagnetic field near-field scan to Switching Power Supply, generates magnetic distribution information.Described probe and
Described computer is connected with described signal analysis device respectively, described space mobile platform and described micro-photographing apparatus respectively with
Described computer connects, and described probe is fixed on described space mobile platform.Described computer sends instruction, controls described space
Mobile platform space is moved, and the probe being fixed on described space mobile platform moves, and the electromagnetic field of point by point scanning Switching Power Supply is near
, the electrical signal data in Real-time Collection Switching Power Supply electromagnetic field near field, and the electrical signal data collecting is sent to described letter
Number analytical equipment, described signal analysis device analyzes described electrical signal data, obtains signal measurement data, and described signal is surveyed
Amount data is activation monitors the distance between described probe and described Switching Power Supply to described computer, described micro-photographing apparatus,
And the range data obtaining monitoring sends to described computer, described computer according to described signal measurement data and described away from
From data, process the magnetic distribution information obtaining Switching Power Supply.
Refer to Fig. 5 and Fig. 6, Fig. 5 be Switching Power Supply of the present invention Ripple Noise detection method in alternating magnetic field spectrogram；
Fig. 6 is the frequency spectrum after the Ripple Noise Fourier transformation of Ripple Noise detection method breaker in middle power supply of Switching Power Supply of the present invention
Figure.
Based on coupling (field coupling and magnetic field coupling between the Ripple Noise in switching power circuit and probe
Close), the alternating magnetic field spectrogram being detected at the one of Switching Power Supply surface is as shown in figure 5, stricture of vagina to same Switching Power Supply
The spectrogram that ripple noise carries out gained after Fourier transformation is as shown in Figure 6.
Contrast Fig. 5 and Fig. 6 understands, the frequency spectrum in two accompanying drawings is substantially corresponding in peak position, by detection switch power supply
On inside or surface, corresponding electromagnetic wave can detect that generation position in Switching Power Supply for the Ripple Noise and propagation path.
Refer to Fig. 7, Fig. 7 be Switching Power Supply of the present invention Ripple Noise detection method in electromagnetic field intensity information distribution
Figure.
Electromagnetic field near field can be carried out to inverse-excitation type switch power-supply by the Ripple Noise detection method of Switching Power Supply of the present invention
Scanning, (a) figure in Fig. 7 and (b) figure are the magnetic field intensity in two horizontal directions of X, Y on the plane of scanning motion respectively, and (c) is vertical
Directly in the electric field intensity on inverse-excitation type switch power-supply surface.Ripple current can be accurately positioned by Fig. 7 and produce position and ripple voltage
Generation position.In addition, also can manually scan for other positions alternation electricity, magnetic field intensity come to detect other by
In the nearly and ignored ripple current of insufficient height and ripple voltage source.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of Ripple Noise detection method of Switching Power Supply is it is characterised in that comprise the following steps：
Obtain and the magnetic distribution information that electromagnetic field near-field scan is generated is carried out to the Switching Power Supply under default load, wherein,
Described magnetic distribution information includes electric field in the electric-field intensity distribution information of the first scanning of a surface and magnetic field in the second scan table
The magnetic field distribution information in face；
Obtain the primary importance mark that intensity in described electric-field intensity distribution information is higher than the surface location residing for electric field of electric field threshold value
Know；
Obtain the second position mark that intensity in described magnetic field distribution information is higher than the surface location residing for magnetic field of magnetic field threshold value
Know；
According to the corresponding relation of described first scanning of a surface and each power supply unit interdigit of described Switching Power Supply, search described first
Putting the corresponding power supply position of mark is Ripple Noise voltage source position；
According to the corresponding relation of described second scanning of a surface and each power supply unit interdigit of described Switching Power Supply, search described second
Putting the corresponding power supply position of mark is Ripple Noise current source position.
2. the Ripple Noise detection method of Switching Power Supply according to claim 1 is it is characterised in that obtain to default load
Under Switching Power Supply carry out electric field that electromagnetic field near-field scan generated in the electric-field intensity distribution information of the first scanning of a surface and
The step of the magnetic field distribution information in the second scanning of a surface for the magnetic field comprises the following steps：
Popped one's head in first plane of scanning motion apart from surface first preset height of described Switching Power Supply to institute by alternating electric field
State the near field electric field scanning that Switching Power Supply carries out vertical direction, generate electric-field strength on described first plane of scanning motion for the vertical electric field
Degree distributed intelligence；
Popped one's head in second plane of scanning motion apart from surface second preset height of described Switching Power Supply to institute by alternating magnetic field
State the near field field scan that Switching Power Supply carries out two horizontal directions, the horizontal magnetic field generating described two horizontal directions is described
Magnetic field distribution information on second plane of scanning motion.
3. the Ripple Noise detection method of Switching Power Supply according to claim 2 exists it is characterised in that generating vertical electric field
After the step of electric-field intensity distribution information on described first plane of scanning motion, further comprising the steps of：
Popped one's head in the 3rd plane of scanning motion apart from surface the 3rd preset height of described Switching Power Supply by horizontal alternating electric field
Described Switching Power Supply is carried out with the near field electric field scanning of horizontal direction, generates electricity on described 3rd plane of scanning motion for the horizontal component of electric field
Field intensity distributed intelligence.
4. the Ripple Noise detection method of Switching Power Supply according to claim 1 is it is characterised in that searching described first
After power supply position corresponding to station location marker is the step of Ripple Noise voltage source position, further comprising the steps of：
By alternating electric field probe in the same surface location differing heights apart from described Switching Power Supply respectively to described switch electricity
Source carries out the near field electric field scanning of vertical direction, obtains the electric field intensity of each height corresponding；
Obtain the difference of the electric field intensity of corresponding any two height；
If described difference is in default electric field difference range, with the corresponding power supply position of described primary importance mark as ripple
Noise voltage source position；
If it is not, then reacquiring electric field Switching Power Supply being carried out with electric field that electric field near-field scan generated in other surfaces position
Strength distributing information.
5. Switching Power Supply as claimed in any of claims 1 to 4 Ripple Noise detection method it is characterised in that
After searching the corresponding power supply position of described second position mark and being the step of Ripple Noise current source position, also wrap
Include following steps：
By alternating magnetic field probe in the same surface location differing heights apart from described Switching Power Supply respectively to described switch electricity
Source carries out the near field field scan of two horizontal directions, obtains the magnetic field intensity of each height corresponding；
Obtain the difference of the magnetic field intensity of corresponding any two height；
If described difference is in the range of the difference of default magnetic field, with the corresponding power supply position of described second position mark as ripple
Noise current source position；
If it is not, then reacquiring magnetic field Switching Power Supply being carried out with magnetic field that magnetic field near-field scan generated in other surfaces position
Strength distributing information.
6. a kind of Ripple Noise detecting system of Switching Power Supply is it is characterised in that include：
Distributed intelligence acquisition module, carries out what electromagnetic field near-field scan was generated for obtaining to the Switching Power Supply under default load
Magnetic distribution information, wherein, described magnetic distribution information includes electric field and believes in the electric-field intensity distribution of the first scanning of a surface
Cease the magnetic field distribution information in the second scanning of a surface with magnetic field；
First identifier acquisition module, is higher than residing for the electric field of electric field threshold value for obtaining intensity in described electric-field intensity distribution information
The primary importance mark of surface location；
Second identifier acquisition module, is higher than residing for the magnetic field of magnetic field threshold value for obtaining intensity in described magnetic field distribution information
The second position mark of surface location；
Ripple Noise voltage source determining module, for each power supply position according to described first scanning of a surface and described Switching Power Supply
Between corresponding relation, searching the corresponding power supply position of described primary importance mark is Ripple Noise voltage source position；
Ripple Noise current source determining module, for each power supply position according to described second scanning of a surface and described Switching Power Supply
Between corresponding relation, searching the corresponding power supply position of described second position mark is Ripple Noise current source position.
7. the Ripple Noise detecting system of Switching Power Supply according to claim 6 is it is characterised in that described distributed intelligence obtains
Delivery block includes Electric Field Distribution data obtaining module and Distribution of Magnetic Field data obtaining module, wherein：
Described Electric Field Distribution data obtaining module is used for popping one's head on the surface first apart from described Switching Power Supply by alternating electric field
In first plane of scanning motion of preset height, described Switching Power Supply is carried out with the near field electric field scanning of vertical direction, generates vertical electric field
Electric-field intensity distribution information on described first plane of scanning motion；
Described Distribution of Magnetic Field data obtaining module is used for popping one's head on the surface second apart from described Switching Power Supply by alternating magnetic field
In second plane of scanning motion of preset height, described Switching Power Supply is carried out with the near field field scan of two horizontal directions, generates described
Magnetic field distribution information on described second plane of scanning motion for the horizontal magnetic field of two horizontal directions.
8. the Ripple Noise detecting system of Switching Power Supply according to claim 7 is it is characterised in that described distributed intelligence obtains
Delivery block also includes horizontal component of electric field distributed intelligence acquisition module, for switching electricity by horizontal alternating electric field probe apart from described
In 3rd plane of scanning motion of surface the 3rd preset height in source, described Switching Power Supply is carried out with the near field electric field scanning of horizontal direction,
Generate electric-field intensity distribution information on described 3rd plane of scanning motion for the horizontal component of electric field.
9. the Ripple Noise detecting system of Switching Power Supply according to claim 6 is it is characterised in that also include electric field intensity
Acquisition module, the first difference block and the first anticipation module, wherein：
Described electric field intensity acquisition module is used for popping one's head in the same surface location apart from described Switching Power Supply by alternating electric field
Differing heights carry out the near field electric field scanning of vertical direction respectively to described Switching Power Supply, obtain the electric-field strength of each height corresponding
Degree；
Described first difference block is used for obtaining the difference of the electric field intensity of corresponding any two height；
Described first anticipation module is used for, when described difference is in default electric field difference range, notifying described Ripple Noise voltage
Source determining module is with the corresponding power supply position of described primary importance mark for Ripple Noise voltage source position；
Described first anticipation module is additionally operable to, when described difference is not in default electric field difference range, notify described distributed intelligence
Acquisition module reacquires electric-field strength Switching Power Supply being carried out with electric field that electric field near-field scan generated in other surfaces position
Degree distributed intelligence.
10. the Switching Power Supply according to any one in claim 6 to 9 Ripple Noise detecting system it is characterised in that
Also include magnetic field intensity acquisition module, the second difference block and the second anticipation module, wherein：
Described magnetic field intensity acquisition module is used for popping one's head in the same surface location apart from described Switching Power Supply by alternating magnetic field
Differing heights carry out the near field field scan of two horizontal directions respectively to described Switching Power Supply, obtain the magnetic of each height corresponding
Field intensity；
Described second difference block is used for obtaining the difference of the magnetic field intensity of corresponding any two height；
Described second anticipation module is used for, when described difference is in the range of the difference of default magnetic field, notifying described Ripple Noise electric current
Source determining module is with the corresponding power supply position of described second position mark for Ripple Noise current source position；
Described second anticipation module is additionally operable to, when described difference is not in the range of the difference of default magnetic field, notify described distributed intelligence
Acquisition module reacquires that Switching Power Supply carried out with the magnetic field that magnetic field near-field scan generated is strong in the magnetic field of other surfaces position
Degree distributed intelligence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837105.2A CN104459361B (en) | 2014-12-26 | 2014-12-26 | The Ripple Noise detection method of Switching Power Supply and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837105.2A CN104459361B (en) | 2014-12-26 | 2014-12-26 | The Ripple Noise detection method of Switching Power Supply and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104459361A CN104459361A (en) | 2015-03-25 |
| CN104459361B true CN104459361B (en) | 2017-03-08 |
Family
ID=52905734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410837105.2A Active CN104459361B (en) | 2014-12-26 | 2014-12-26 | The Ripple Noise detection method of Switching Power Supply and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104459361B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772115A (en) * | 2015-11-19 | 2017-05-31 | 中车大连电力牵引研发中心有限公司 | Switching Power Supply ripple measurement apparatus and measuring method |
| CN106019169A (en) * | 2016-05-11 | 2016-10-12 | 深圳市优必选科技有限公司 | Testing probe and testing method for ripples and noises of power supply |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5035039B2 (en) * | 2008-03-11 | 2012-09-26 | 日本電気株式会社 | Electronic circuit board power noise analysis method, system and program |
| JP5369969B2 (en) * | 2009-07-31 | 2013-12-18 | 日本電気株式会社 | Power supply noise measurement circuit and measurement method |
| CN102735325B (en) * | 2012-06-06 | 2014-07-23 | 中国电力科学研究院 | Audible noise calculating method for high-voltage direct current electric transmission line |
| CN103941106B (en) * | 2014-04-29 | 2017-09-19 | 工业和信息化部电子第五研究所 | Electromagnetic field near-field scan device and scan method |
| CN103983887B (en) * | 2014-05-23 | 2017-05-10 | 工业和信息化部电子第五研究所 | Automatic locating method and device for open circuit of circuit |
-
2014
- 2014-12-26 CN CN201410837105.2A patent/CN104459361B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104459361A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7642973B2 (en) | Electromagnetic wave analysis apparatus and design support apparatus | |
| JP5493909B2 (en) | Partial discharge position locating method and apparatus therefor | |
| CN203054162U (en) | Comprehensive tester for partial discharge of high-voltage cable | |
| CN102749557A (en) | Partial discharging detecting device of switch cabinet | |
| CN112630585B (en) | Distribution cable partial discharge live detection system and detection method | |
| CN104459361B (en) | The Ripple Noise detection method of Switching Power Supply and system | |
| CN111034389B (en) | Electrostatic discharge immunity test method | |
| CN204789774U (en) | Antenna directivity diagram plane near field scanning test equipment | |
| CN211263803U (en) | Grounding grid topological structure measuring device with wireless transmission function | |
| CN103207355A (en) | System and method for detecting partial discharge signal of cable | |
| CN108535617A (en) | A kind of partial discharge positioning method and positioning system of switchgear | |
| CN103983887B (en) | Automatic locating method and device for open circuit of circuit | |
| CN105572482B (en) | Closed space electric field measuring equipment | |
| CN111880114A (en) | Method and system for detecting breakpoint of grounding body of power transmission tower | |
| CN104730440A (en) | TEV-based switch cabinet partial discharge detection system | |
| CN110196382A (en) | A kind of no check frequency oscillation wave partial discharge detection device | |
| CN205246763U (en) | Airtight space electric field measuring equipment | |
| CN110554281A (en) | Inspection method, maintenance method and inspection system for electrical equipment | |
| CN103809092A (en) | Test equipment for partial discharge of oscillatory wave cable based on optical electric field transducer | |
| CN207067297U (en) | Detect the device of inductor open circuit | |
| CN111562446A (en) | Electromagnetic field test processing method | |
| Petrascu et al. | Automated 3D scanner for electromagnetic radiation assessment near the WPT active part | |
| CN114814425B (en) | Method for testing electromagnetic compatibility of power supply module by adopting power absorption pliers | |
| CN211603411U (en) | Wireless transmission multi-point simultaneous positioning cable fault point quick positioning instrument | |
| CN105182108B (en) | A kind of evaluating apparatus of power transmission and transformation primary equipment test tool environment electromagnetics compatibility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |