CN107561364A - Cross one another insulation detecting method and system - Google Patents
Cross one another insulation detecting method and system Download PDFInfo
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- CN107561364A CN107561364A CN201610517863.5A CN201610517863A CN107561364A CN 107561364 A CN107561364 A CN 107561364A CN 201610517863 A CN201610517863 A CN 201610517863A CN 107561364 A CN107561364 A CN 107561364A
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Abstract
A kind of cross one another insulation detecting method and system, methods described include：Obtain the low-frequency square-wave of the first insulation monitoring module of the first electric automobile and the low-frequency square-wave of second the second insulation monitoring module of electric automobile；The model of the low-frequency square-wave of the first insulation monitoring module and the low-frequency square-wave of the second insulation monitoring module is adjusted, the low-frequency square-wave of the second insulation monitoring module after the low-frequency square-wave of the first insulation monitoring module and regulation after regulation is carried out time interleaving and detects power-supply system to be checked；And carry out time interleaving detection power-supply system to be checked using the low-frequency square-wave of the second insulation monitoring module after the low-frequency square-wave of the first insulation monitoring module after regulation and regulation.The present invention also provides a kind of cross one another Insulation Inspection System.The present invention realizes two insulation monitoring modules cooperation without interfering with each other, meets the requirement of the charging scenarios of the common positive negative pole of rush-harvesting and rush-planting.
Description
【Technical field】
The present invention relates to electric vehicle engineering field, more particularly to a kind of cross one another insulation detecting method and system.
【Background technology】
With increasingly raising of the human society to environmental requirement, electric automobile starts to be concerned, researched and developed all over the world.Absolutely
Edge monitoring has kinds of schemes and is developed at present as one of electric vehicle engineering.The international standard regulation of electric automobile：Insulation
Resistance value divided by electric automobile straight-flow system nominal voltage U, as a result should be greater than 100 Ω/V.Currently used insulated monitoring method
Have following several：
(1) amperometr iotac sensing
It is a kind of common methods to high-voltage direct current detection using Hall current sensor, will be to be measured in power-supply system
Positive pole and negative pole is equidirectional together passes through current sensor, when there is no leakage current, be equal to from the electric current of positive source outflow
Return to the electric current of power cathode.Therefore, it is 0 through the electric current of current sensor, the output voltage of current sensor is 0, when
During generation leaky, the output voltage of current sensor is not zero.Positive and negative according to the voltage can determine whether the leakage
Come from positive source or negative pole during electric current.But it is that power supply to be measured necessarily be in work using the premise of this detection method
State, there is flowing in and out for operating current, it can not evaluate the insulation of power supply over the ground in the case of power-supply system zero load
Performance.
(2) balanced bridge method
Utilize the principle of bridge circuit, it is believed that Devices to test straight-flow system positive and negative busbar has a fixed insulation over the ground
Resistance, the two insulaion resistances may be considered equal in the case that insulation is good, and positive and negative terminals can be used as two bridge arms, ground
A bridge arm can be used as, can connect two big resistance of equivalence between positive and negative busbar in addition, be a bridge between two resistance
Arm, a null-type bridge circuit is thus constituted, in the case where insulation is good, it is 0, one to flow through the electric current between two bridge arms
The insulation of denier one end declines, electric bridge just disequilibrium, and the electric current between two bridge arms is not just 0.The shortcomings that this method, is it is obvious that be exactly
It is very high to the precise requirements of structure circuit, while can not accurately and timely be alarmed when both positive and negative polarity insulating properties reduce simultaneously.
(3) accessory power supply method
In the detection of electrical leakage of some electric locomotives of China, using 110V batteries, by battery positive voltage and high pressure to be measured
DC power cathode is connected, and one point earth can be achieved with locomotive in battery terminal negative, in the good feelings of examining system insulating properties
Under condition, battery does not have current loop, and leakage current zero, in the case of damage in insulation or aging humidity, battery passes through exhausted
Edge layer forms closed-loop path, produces leakage current, is alarmed according to the size of leakage current, and turn off power supply to be measured.This method shortcoming
Substantially, it is exactly that this is not advocated in electrical system directly by the one point earth of battery.
(4) Low frequency signal injection method
Low frequency signal injection method is to inject alternating low frequency signal on electric loop, is sentenced by the detection to low frequency signal
Disconnected measure loop insulation status, while also the fluctuation to power supply signal is also assessed, and reflects power supply pair very much accurate stable
The insulaion resistance on ground.This is a kind of relatively effective electrical leakage detecting method, and current electric automobile uses relatively broad one
Kind method.
But currently with the popularization of domestic electric automobile, the raising to charge efficiency proposes high request, and two rifles are same
When to the charging of two electric cars scene be certainly exist and also large scale quantity existing for.And charger producer is cost-effective
Employ two rifles altogether, two rifles altogether positive negative pole design, now necessarily cause on electric automobile using the exhausted of low frequency injection method
Edge detection module detects same power-supply system simultaneously, causes to interfere with each other and fail.
Traditional low-frequency injection method exist can not two insulation monitoring modules detect the limitation of same power-supply system simultaneously, no
Adapt to the charging scenarios of the common positive negative pole of rush-harvesting and rush-planting being widely present at present.
【The content of the invention】
In view of the foregoing, it is necessary to a kind of cross one another insulation detecting method and system are provided, realize two absolutely
Edge detection module cooperation without interfering with each other, meet the requirement of rush-harvesting and rush-planting charging scenarios of positive negative pole altogether.
A kind of cross one another insulation detecting method, methods described include：
Obtain low-frequency square-wave and the insulation inspection of the second electric automobile second of the first insulation monitoring module of the first electric automobile
Survey the low-frequency square-wave of module；
The model of the low-frequency square-wave of the first insulation monitoring module and the low-frequency square-wave of the second insulation monitoring module is adjusted, makes tune
The low-frequency square-wave of the second insulation monitoring module carries out time interleaving after the low-frequency square-wave of the first insulation monitoring module and regulation after section
Detect power-supply system to be checked；And
Utilize the low frequency of the second insulation monitoring module after the low-frequency square-wave of the first insulation monitoring module after regulation and regulation
Square wave carries out time interleaving and detects power-supply system to be checked.
According to one preferred embodiment of the present invention, the low-frequency square-wave of the first insulation monitoring module of the regulation and the second insulation inspection
Surveying the model of the low-frequency square-wave of module includes：
The low-frequency square-wave of first insulation monitoring module is：F1 (t)=A Mod (Int (2*t/T), 2) -0.5A；
The low-frequency square-wave of second insulation monitoring module is：F2 (t)=B Mod (Int (2*t/T), 2) -0.5B；
F1 (t) is multiplied by coefficient Mod (Int (t/T), 2), f2 (t) is multiplied by coefficient (~Mod (Int (t/T), 2)), then
The low-frequency square-wave g1 (t) of the first insulation monitoring module after regulation=f1 (t) * Mod (Int (t/T), 2),
The low-frequency square-wave g1 (t) of the second insulation monitoring module after regulation=f2 (t) * Mod (Int (t/T), 2).
According to one preferred embodiment of the present invention, the low-frequency square-wave and tune of first insulation monitoring module using after regulation
The low-frequency square-wave of the second insulation monitoring module, which carries out time interleaving detection power-supply system to be checked, after section includes：
First insulation monitoring module in 1T time detecting power-supply system to be checked using, whether with the presence of low-frequency square-wave, working as inspection
In the presence of measuring no low-frequency square-wave, the first insulation monitoring module starts work；
Second insulation monitoring module whether there is low-frequency square-wave using 1T time detectings power-supply system to be checked, if there is low
Frequency square wave, the then sampling through 1T, the second insulation monitoring module detect the low-frequency square-wave of the first insulation monitoring module, in the first insulation
The low-frequency square-wave of detection, the injection detection are injected at the time of the 0.5T of the next cycle of detection module to power-supply system to be checked
Low-frequency square-wave it is identical with the low-frequency square-wave of the first insulation monitoring module；
When the first insulation monitoring module, which detects, overlaid waveforms be present in power-supply system to be checked, and in next cycle knot
The beam moment stops sending low-frequency square-wave；
Second insulation monitoring module starts to send low-frequency square-wave, stops injection square wave after completing a cycle；
When stopping injection square wave after the second insulation monitoring module completes a cycle, the first insulation monitoring module starts one
The low-frequency square-wave injection in individual cycle, such first insulation monitoring module and the second insulation monitoring module alternately synergistically work.
A kind of cross one another Insulation Inspection System, the system include：
Acquisition module, the low-frequency square-wave and the second electronic vapour of the first insulation monitoring module for obtaining the first electric automobile
The low-frequency square-wave of the insulation monitoring module of car second；
Adjustment module, for adjusting the low-frequency square-wave of the first insulation monitoring module and the low frequency side of the second insulation monitoring module
The model of ripple, make the low-frequency square-wave of the second insulation monitoring module after the low-frequency square-wave of the first insulation monitoring module and regulation after regulation
Carry out time interleaving and detect power-supply system to be checked；And
Detection module, examined for the second insulation after the low-frequency square-wave using the first insulation monitoring module after adjusting and regulation
The low-frequency square-wave for surveying module carries out time interleaving detection power-supply system to be checked.
According to one preferred embodiment of the present invention, the adjustment module adjusts the low-frequency square-wave and the of the first insulation monitoring module
The model of the low-frequency square-wave of two insulation monitoring modules includes：
The low-frequency square-wave of first insulation monitoring module is：F1 (t)=A Mod (Int (2*t/T), 2) -0.5A；
The low-frequency square-wave of second insulation monitoring module is：F2 (t)=B Mod (Int (2*t/T), 2) -0.5B；
F1 (t) is multiplied by coefficient Mod (Int (t/T), 2), f2 (t) is multiplied by coefficient (~Mod (Int (t/T), 2)), then
The low-frequency square-wave g1 (t) of the first insulation monitoring module after regulation=f1 (t) * Mod (Int (t/T), 2),
The low-frequency square-wave g1 (t) of the second insulation monitoring module after regulation=f2 (t) * Mod (Int (t/T), 2).
According to one preferred embodiment of the present invention, the detection module utilizes the low frequency of the first insulation monitoring module after regulation
The low-frequency square-wave of the second insulation monitoring module, which carries out time interleaving detection power-supply system to be checked, after square wave and regulation includes：
First insulation monitoring module in 1T time detecting power-supply system to be checked using, whether with the presence of low-frequency square-wave, working as inspection
In the presence of measuring no low-frequency square-wave, the first insulation monitoring module starts work；
Second insulation monitoring module whether there is low-frequency square-wave using 1T time detectings power-supply system to be checked, if there is low
Frequency square wave, the then sampling through 1T, the second insulation monitoring module detect the low-frequency square-wave of the first insulation monitoring module, in the first insulation
The low-frequency square-wave of detection, the injection detection are injected at the time of the 0.5T of the next cycle of detection module to power-supply system to be checked
Low-frequency square-wave it is identical with the low-frequency square-wave of the first insulation monitoring module；
When the first insulation monitoring module, which detects, overlaid waveforms be present in power-supply system to be checked, and in next cycle knot
The beam moment stops sending low-frequency square-wave；
Second insulation monitoring module starts to send low-frequency square-wave, stops injection square wave after completing a cycle；
When stopping injection square wave after the second insulation monitoring module completes a cycle, the first insulation monitoring module starts one
The low-frequency square-wave injection in individual cycle, such first insulation monitoring module and the second insulation monitoring module alternately synergistically work.
From above technical scheme, the present invention can make two to use the insulation monitoring module of low frequency injection method to survey altogether together
One suspect system, passing through the square wave for adjusting two insulation monitoring modules so that two insulation monitoring modules stagger detection time,
Two insulation monitoring modules cooperation without interfering with each other is realized, meets the requirement of the charging scenarios of the common positive negative pole of rush-harvesting and rush-planting.
Invention increases the function of detecting mutually, enhances the adaptability of low frequency injection method, breaches its original limitation, solves
Can not be the rush-harvesting and rush-planting charging scenarios application of positive negative pole altogether the problem of.
【Brief description of the drawings】
Fig. 1 is the application environment schematic diagram for the preferred embodiment that the present invention realizes cross one another insulation detecting method.
Fig. 2 is the flow chart of the cross one another insulation detecting method preferred embodiment of the present invention.
Fig. 3 is the functional block diagram of the cross one another Insulation Inspection System of the present invention.
Fig. 4 is the schematic diagram of the low-frequency square-wave of the first insulation monitoring module and the injection of the second insulation monitoring module.
Fig. 5 is the staircase waveform the being superimposed extremely signal that the first insulation monitoring module and the second insulation monitoring module are surveyed altogether
Figure.
Fig. 6 is the independent waveform of the first insulation monitoring module and the second insulation monitoring module after regulation.
Fig. 7 is that latter two adjusted insulation monitoring module surveys the waveform being superimposed during a power-supply system altogether.
【Embodiment】
As shown in fig.1, it is the application environment for the preferred embodiment that the present invention realizes cross one another insulation detecting method
Schematic diagram.The application environment schematic diagram includes the first electric automobile 1, the second electric automobile 2 and rush-harvesting and rush-planting negative pole charger 3 altogether.
First electric automobile 1 and the second electric automobile 2 are assembled with cross one another Insulation Inspection System 10, are installed on the first electronic vapour
Cross one another Insulation Inspection System 10 in car 1 includes the first insulation monitoring module 101.It is installed in the second electric automobile 2
Cross one another Insulation Inspection System 10 include the second insulation monitoring module 201.
It was found from Fig. 1 analyses, in the prior art, the low frequency of the first insulation monitoring module 101 on the first electric automobile 1
Square wave returns to original system for detection simultaneously from the car shell injection where A points, from the B points of common negative pole, and the on the second electric automobile 2
The low frequency detection square wave of two insulation monitoring modules 201 returns to former system simultaneously from the car shell injection where C points from the D points of common negative pole
System for detection, the first insulation monitoring module 101 and the second insulation monitoring module 201 simultaneously to insulaion resistance R1, insulaion resistance R2,
Insulaion resistance R3 is detected.Under existing such a situation, the first insulation monitoring module 101 and the note of the second insulation monitoring module 201
The low-frequency square-wave entered is mutually coupled, and the low-frequency square-wave of the first insulation monitoring module 101 and the second insulation monitoring module 201 is superimposed
Distorted afterwards, testing requirements can not be met.
In order to solve above-mentioned problem of the prior art, the principle of cross one another insulation detecting method is as follows：To such as Fig. 1 institutes
The first insulation monitoring module 101 and the low-frequency square-wave of the second insulation monitoring module 201 shown have carried out mathematical modeling, and adjust the
The mathematical modeling of the low-frequency square-wave of one insulation monitoring module 101 and the second insulation monitoring module 201, make originally mutually superimposed the
The low-frequency square-wave of one insulation monitoring module and the low-frequency square-wave of the second insulation monitoring module have staggered the time, have reached the first insulation
The insulation monitoring module 201 of detection module 101 and second detects the requirement of same insulaion resistance simultaneously.
The program code of the cross one another Insulation Inspection System 10 can be divided into multiple according to its different function
Functional module.In the present embodiment, as shown in figure 3, the cross one another Insulation Inspection System 10 can include acquisition module
1000th, adjustment module 1001 and detection module 1002.Specific enumeration in the examples below is stated to the function of modules.
As shown in Fig. 2 it is the flow chart of the cross one another insulation detecting method preferred embodiment of the present invention.The present embodiment phase
The insulation detecting method mutually intersected is not limited to step shown in flow chart, in addition shown in flow chart in step, some steps
It can omit, the order between step can change.And the function of modules is told about in detail in the flow chart.
S10, acquisition module 1000 obtain the low-frequency square-wave and the second insulation monitoring module of the first insulation monitoring module 101
201 low-frequency square-wave.
The low-frequency square-wave of first insulation monitoring module 101 is as follows：
F1 (t1)=A Mod (Int (2*t1/T), 2) -0.5A.................... (1)
The low-frequency square-wave of second insulation monitoring module 201 is as follows：
F1 (t2)=B Mod (Int (2*t2/T), 2) -0.5B.................. (2)
T1=t2+C................................................ (3)
In upper three formula, wherein t1, t2 value are the integer variable more than or equal to 0, represent the time, unit is the second；T is square wave
(dutycycle 1：1) cycle, unit are the second；Mod is MOD function, and Int is bracket function, and A is the first insulation monitoring module 101
Low-frequency square-wave amplitude (known), B be the second insulation monitoring module 102 low-frequency square-wave amplitude (known), C is 2 sides
The phase difference (known) of ripple.C takes 0.5T.
In the case where not examining noise filtering, as shown in figure 4, the first insulation monitoring module and the injection of the second insulation monitoring module
Low-frequency square-wave schematic diagram, in the case where not being superimposed, the signal have passed through insulaion resistance and be returned by battery plus-negative plate, should be
Once decay amplitude reduce, can normally be detected, the square wave of standard.As shown in figure 5, for the first insulation monitoring module and
The staircase waveform schematic diagram that what the second insulation monitoring module was surveyed altogether be superimposed extremely, for this waveform, the first insulation monitoring module 101
Can not normally it be detected with the second insulation monitoring module 201.
It can be seen that to come from Fig. 4 and Fig. 5, the signal that can be normally detected should be a standard block, but after both superpositions, become
It can not be correctly detected after into staircase waveform, the failure of low frequency injection method.Now it is necessary to adjust the first insulation monitoring module 101
Low-frequency square-wave and the second insulation monitoring module 201 low-frequency square-wave model, both square wave is not superimposed.
S11, adjustment module 1001 adjust the low-frequency square-wave and the second insulation monitoring module of the first insulation monitoring module 101
The model of 201 low-frequency square-wave, make after regulation the second Insulation monitoring after the low-frequency square-wave of the first insulation monitoring module 101 and regulation
The low-frequency square-wave of module 201 carries out time interleaving and detects power-supply system to be checked.It is specific as follows：
Formula (1) formula (2) formula (3) is arranged, t1=t2=t is made, then has formula (4) formula (5)
F1 (t)=A Mod (Int (2*t/T), 2) -0.5A................... (4)
F2 (t)=B Mod (Int (2*t/T), 2) -0.5B................... (5)
And then a coefficient is multiplied by formula (4) formula (5), make 2 square waves not be superimposed ground cross detection, obtain formula (6) formula
(7)
G1 (t)=f1 (t) * Mod (Int (t/T), 2) ... ... ... ... .. (6)
G2 (t)=f2 (t) * (~Mod (Int (t/T), 2)) ... ... ... ... (7)
In formula (6) formula (7), symbol "~" represent to negate, because to 2 complementation results non-zero i.e. 1, inversion operation can be made.
As shown in fig. 6, Fig. 6 is the first insulation monitoring module and the independent waveform of the second insulation monitoring module after regulation.
As shown in fig. 7, Fig. 7 is latter two adjusted insulation monitoring module surveys the waveform being superimposed during a power-supply system altogether.
S12, detection module 1002 utilize after the low-frequency square-wave of the first insulation monitoring module 101 after regulation and regulation second
The low-frequency square-wave of insulation monitoring module 201 carries out time interleaving and detects power-supply system to be checked.
As known to Fig. 5 and Fig. 6, actually the first insulation monitoring module 101 and the second insulation monitoring module 201 carry out the time
Cross detection, for the first insulation monitoring module 101 when carrying out Insulation monitoring, the second insulation monitoring module 201 abandons detection simultaneously
Also low-frequency square-wave is not injected into, and when the second insulation monitoring module 201 carries out Insulation monitoring, the second insulation monitoring module 201 is put
Abandon detection while be also not injected into low-frequency square-wave.So, two Insulation monitorings using the detection insulation of low frequency injection method are achieved that
Module is without interfering with each other the same as one power-supply system of survey.
In practical application, the first insulation monitoring module 101 and the second insulation monitoring module 201 are frequently not while opened
Open, if the first insulation monitoring module 101 first starts, and start after the second insulation monitoring module 201, one is surveyed altogether with this scene interpretation
The first insulation monitoring module 101 and the second insulation monitoring module 201 of individual suspect system are how to automatically adjust, after regulation
The first insulation monitoring module 101 low-frequency square-wave and the second insulation monitoring module 201 low-frequency square-wave detect an electricity to be checked
The process of source system is as follows：
First insulation monitoring module 101 using in 1T time detecting power-supply system to be checked whether with the presence of low-frequency square-wave,
In the presence of no low-frequency square-wave is detected, the first insulation monitoring module 101 starts work.
Second insulation monitoring module 201 whether there is low-frequency square-wave using 1T time detectings power-supply system to be checked, if deposited
In low-frequency square-wave, the then sampling through 1T, the second insulation monitoring module 201 detects the low-frequency square-wave of the first insulation monitoring module 101,
The low frequency side of detection is injected to power-supply system to be checked at the time of the 0.5T of the next cycle of the first insulation monitoring module 101
Ripple, the low-frequency square-wave of the injection detection are identical with the low-frequency square-wave of the first insulation monitoring module 101.I.e. amplitude, frequency be all
It is identical.
When the first insulation monitoring module 101, which detects, overlaid waveforms be present in power-supply system to be checked, and in next week
Finish time phase stops sending low-frequency square-wave.
Second insulation monitoring module 201 starts to send low-frequency square-wave, stops injection square wave after completing a cycle.
When stopping injection square wave after the second insulation monitoring module 201 completes a cycle, the first insulation monitoring module 101
Start the low-frequency square-wave injection of a cycle.
Such insulation monitoring module 201 of first insulation monitoring module 101 and second alternately synergistically works, and does not interfere with each other.
In the present invention, two when having used the insulation monitoring module of low frequency injection method to survey same suspect system altogether, this
Invention is by adjusting the square waves of two insulation monitoring modules so that two insulation monitoring modules stagger detection time, realize
Two insulation monitoring modules cooperation without interfering with each other, meet the requirement of rush-harvesting and rush-planting charging scenarios of positive negative pole altogether.The present invention
The function of detecting mutually is added, enhances the adaptability of low frequency injection method, breaches its original limitation, solving can not
The problem of charging scenarios in the common positive negative pole of rush-harvesting and rush-planting are applied.
In addition, each functional module in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can be realized in the form of hardware, can also be realized in the form of hardware adds software function module.
It will be apparent to one skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and not
In the case of the spirit or essential attributes of the present invention, the present invention can be realized in other specific forms.Therefore, no matter which
From the point of view of a bit, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention will by appended right
Ask rather than described above limits, it is intended that all changes in the implication and scope of the equivalency of claim will be fallen
It is included in the present invention.Any attached associated diagram mark in claim should not be considered as the involved claim of limitation.This
Outside, it is clear that the word of " comprising " one is not excluded for other units or step, and odd number is not excluded for plural number.That is stated in system claims is more
Individual unit or device can also either device be realized by software or hardware by a unit." first ", " second " (if
In the presence of) etc. word be used for representing title, rather than represent any specific order.
It should be noted last that the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although ginseng
The present invention is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention.
Claims (6)
1. a kind of cross one another insulation detecting method, it is characterised in that methods described includes：
Obtain the low-frequency square-wave and second electric automobile the second Insulation monitoring mould of the first insulation monitoring module of the first electric automobile
The low-frequency square-wave of block；
The model of the low-frequency square-wave of the first insulation monitoring module and the low-frequency square-wave of the second insulation monitoring module is adjusted, after making regulation
The low-frequency square-wave of the second insulation monitoring module carries out time interleaving detection after the low-frequency square-wave of first insulation monitoring module and regulation
Power-supply system to be checked；And
Utilize the low-frequency square-wave of the second insulation monitoring module after the low-frequency square-wave of the first insulation monitoring module after regulation and regulation
Carry out time interleaving and detect power-supply system to be checked.
2. cross one another insulation detecting method as claimed in claim 1, it is characterised in that the first Insulation monitoring of the regulation
The model of the low-frequency square-wave of module and the low-frequency square-wave of the second insulation monitoring module includes：
The low-frequency square-wave of first insulation monitoring module is：F1 (t)=A Mod (Int (2*t/T), 2) -0.5A；
The low-frequency square-wave of second insulation monitoring module is：F2 (t)=B Mod (Int (2*t/T), 2) -0.5B；
F1 (t) is multiplied by coefficient Mod (Int (t/T), 2), f2 (t) is multiplied by coefficient (~Mod (Int (t/T), 2)), then
The low-frequency square-wave g1 (t) of the first insulation monitoring module after regulation=f1 (t) * Mod (Int (t/T), 2),
The low-frequency square-wave g1 (t) of the second insulation monitoring module after regulation=f2 (t) * Mod (Int (t/T), 2).
3. cross one another insulation detecting method as claimed in claim 1, it is characterised in that first after the utilization regulation
It is to be checked to carry out time interleaving detection for the low-frequency square-wave of the second insulation monitoring module after the low-frequency square-wave of insulation monitoring module and regulation
Power-supply system includes：
First insulation monitoring module using in 1T time detecting power-supply system to be checked whether with the presence of low-frequency square-wave, when detecting
In the presence of not having low-frequency square-wave, the first insulation monitoring module starts work；
Second insulation monitoring module whether there is low-frequency square-wave using 1T time detectings power-supply system to be checked, if there is low frequency side
Ripple, then the sampling through 1T, the second insulation monitoring module detects the low-frequency square-wave of the first insulation monitoring module, in the first Insulation monitoring
The low-frequency square-wave of detection is injected at the time of the 0.5T of the next cycle of module to power-supply system to be checked, the injection detects low
Frequency square wave is identical with the low-frequency square-wave of the first insulation monitoring module；
When the first insulation monitoring module, which detects, overlaid waveforms be present in power-supply system to be checked, and at the end of next cycle
Carve and stop sending low-frequency square-wave；
Second insulation monitoring module starts to send low-frequency square-wave, stops injection square wave after completing a cycle；
When stopping injection square wave after the second insulation monitoring module completes a cycle, the first insulation monitoring module starts a week
The low-frequency square-wave injection of phase, such first insulation monitoring module and the second insulation monitoring module alternately synergistically work.
4. a kind of cross one another Insulation Inspection System, it is characterised in that the system includes：
Acquisition module, for the low-frequency square-wave and the second electric automobile the of the first insulation monitoring module for obtaining the first electric automobile
The low-frequency square-wave of two insulation monitoring modules；
Adjustment module, for adjusting the low-frequency square-wave of the first insulation monitoring module and the low-frequency square-wave of second insulation monitoring module
Model, carry out the low-frequency square-wave of the second insulation monitoring module after the low-frequency square-wave of the first insulation monitoring module and regulation after regulation
Time interleaving detects power-supply system to be checked；And
Detection module, for the second Insulation monitoring mould after the low-frequency square-wave using the first insulation monitoring module after adjusting and regulation
The low-frequency square-wave of block carries out time interleaving and detects power-supply system to be checked.
5. cross one another Insulation Inspection System as claimed in claim 4, it is characterised in that the adjustment module regulation first
The model of the low-frequency square-wave of insulation monitoring module and the low-frequency square-wave of the second insulation monitoring module includes：
The low-frequency square-wave of first insulation monitoring module is：F1 (t)=A Mod (Int (2*t/T), 2) -0.5A；
The low-frequency square-wave of second insulation monitoring module is：F2 (t)=B Mod (Int (2*t/T), 2) -0.5B；
F1 (t) is multiplied by coefficient Mod (Int (t/T), 2), f2 (t) is multiplied by coefficient (~Mod (Int (t/T), 2)), then
The low-frequency square-wave g1 (t) of the first insulation monitoring module after regulation=f1 (t) * Mod (Int (t/T), 2),
The low-frequency square-wave g1 (t) of the second insulation monitoring module after regulation=f2 (t) * Mod (Int (t/T), 2).
6. cross one another Insulation Inspection System as claimed in claim 4, it is characterised in that the detection module utilizes regulation
The low-frequency square-wave of the second insulation monitoring module carries out time interleaving after the low-frequency square-wave of the first insulation monitoring module afterwards and regulation
Detecting power-supply system to be checked includes：
First insulation monitoring module using in 1T time detecting power-supply system to be checked whether with the presence of low-frequency square-wave, when detecting
In the presence of not having low-frequency square-wave, the first insulation monitoring module starts work；
Second insulation monitoring module whether there is low-frequency square-wave using 1T time detectings power-supply system to be checked, if there is low frequency side
Ripple, then the sampling through 1T, the second insulation monitoring module detects the low-frequency square-wave of the first insulation monitoring module, in the first Insulation monitoring
The low-frequency square-wave of detection is injected at the time of the 0.5T of the next cycle of module to power-supply system to be checked, the injection detects low
Frequency square wave is identical with the low-frequency square-wave of the first insulation monitoring module；
When the first insulation monitoring module, which detects, overlaid waveforms be present in power-supply system to be checked, and at the end of next cycle
Carve and stop sending low-frequency square-wave；
Second insulation monitoring module starts to send low-frequency square-wave, stops injection square wave after completing a cycle；
When stopping injection square wave after the second insulation monitoring module completes a cycle, the first insulation monitoring module starts a week
The low-frequency square-wave injection of phase, such first insulation monitoring module and the second insulation monitoring module alternately synergistically work.
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| CN201610517863.5A CN107561364A (en) | 2016-07-01 | 2016-07-01 | Cross one another insulation detecting method and system |
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| CN201610517863.5A CN107561364A (en) | 2016-07-01 | 2016-07-01 | Cross one another insulation detecting method and system |
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| CN112003275A (en) * | 2020-08-17 | 2020-11-27 | 深圳弘德智能有限公司 | Safe power supply system and method |
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Application publication date: 20180109 |