CN106841962A - Insulation detection circuit and insulation detection method for high-voltage component - Google Patents
Insulation detection circuit and insulation detection method for high-voltage component Download PDFInfo
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- CN106841962A CN106841962A CN201710103164.0A CN201710103164A CN106841962A CN 106841962 A CN106841962 A CN 106841962A CN 201710103164 A CN201710103164 A CN 201710103164A CN 106841962 A CN106841962 A CN 106841962A
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- 238000009413 insulation Methods 0.000 title claims abstract description 68
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 230000008859 change Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 8
- 238000003708 edge detection Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 11
- 238000012986 modification Methods 0.000 description 3
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- 230000008901 benefit Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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Abstract
The invention provides an insulation detection circuit and an insulation detection method for a high-voltage component, wherein the insulation detection circuit comprises: the first series circuit is connected with the high-voltage component to be detected; the second series circuit is connected with the high-voltage component to be detected and used for controlling the current trend, and the second series circuit is connected with the first series circuit in parallel; the third series circuit is connected with the high-voltage component to be detected and is connected with the second series circuit in parallel; and the fourth series circuit is connected with the high-voltage component to be detected in parallel, and one end of each of the first series circuit, the second series circuit, the third series circuit and the fourth series circuit is grounded. Through the added fourth series circuit and the control of the second series circuit, the insulation detection of high-voltage components of various vehicle types can be matched, and the accuracy of the detected result is high.
Description
Technical field
The present invention relates to field of vehicle part detection, especially a kind of high voltage component insulation detecting circuit and Insulation monitoring
Method.
Background technology
In the application process of electric automobile, be related to many high voltage components, thus high voltage component Insulation monitoring particularly
Important, the mode of current Insulation monitoring mainly has Leakage Method, balanced bridge formula, low frequency injection etc., and which kind of mode is all
Detection vehicle high pressure is total, and just and always negative leakage current over the ground detects virtual insulation resistance value in other words, but exists in insulation detecting circuit
During vehicle environmental applications, because high pressure annex is in order to ensure the electromagnetic interference of itself, total in system just and always bears over the ground
Will plus Y capacitance or vehicle body also have electric capacity over the ground in itself, this be accomplished by real-time calibration Insulation monitoring the measure loop cycle and
Sequential is matching influence of the different electric capacity to measure loop.
The content of the invention
The embodiment of the present invention technical problem to be solved is to provide a kind of high voltage component insulation detecting circuit and Insulation monitoring
Method, when being influenceed now with capacitance on circuit to reality, accurately carries out Insulation monitoring to high voltage component.
In order to solve the above technical problems, high voltage component insulation detecting circuit provided in an embodiment of the present invention, including：
The first series circuit being connected with high voltage component to be detected；
The second series circuit for being connected with the high voltage component to be detected, being moved towards for control electric current, second series connection
Circuit is in parallel with first series circuit；
The 3rd series circuit being connected with the high voltage component to be detected, the 3rd series circuit is connected with described second
Circuit in parallel；
The 4th series circuit being connected with the high voltage component to be detected, the 4th series circuit is connected with the described 3rd
Circuit in parallel, and first series circuit, second series circuit, the 3rd series circuit and the 4th series electrical
The one end on road is grounded.
Preferably, first series circuit includes：
The first resistor and second resistance of interconnection, one end of the first resistor connect with the high voltage component to be detected
Connect, one end of the second resistance is connected with the high voltage component to be detected, and the first resistor and the second resistance
The other end is grounded.
Preferably, second series circuit includes：
The 3rd resistor of interconnection and the 4th resistance, the first switch being connected with the 3rd resistor, and with it is described
The second switch of the 4th resistance connection；The first switch connects with the high voltage component to be detected and the first resistor respectively
Connect, the second switch is connected with the high voltage component to be detected and the second resistance respectively, and the 3rd resistor and institute
The one end for stating the 4th resistance is grounded.
Preferably, the 3rd series circuit includes：
Be connected with each other the 5th resistance and the 6th resistance, the 5th resistance respectively with the high voltage component to be detected, institute
State first resistor and first switch connection, one end of the 6th resistance respectively with the high voltage component to be detected, described
Second resistance and the second switch are connected, and the other end of the 5th resistance and the 6th resistance is grounded.
Preferably, the 4th series circuit includes：
The first electric capacity and the second electric capacity being connected with each other, one end of first electric capacity respectively with the high-voltage section to be detected
Part, the first resistor, the first switch and the 5th electrical connection, one end of second electric capacity are to be checked with described respectively
Survey the connection of high voltage component, the second resistance, the second switch and the 6th resistance, and first electric capacity and described the
The other end of two electric capacity is grounded.
Another aspect according to embodiments of the present invention, the embodiment of the present invention additionally provides a kind of high voltage component Insulation monitoring electricity
Road insulation detecting method, including：
Control second series circuit to be conducted to the first preset state, gather the first voltage and the 6th electricity of the 5th resistance
The second voltage of resistance；
Second series circuit is controlled to switch to the second preset state, collection the described 5th from first preset state
4th voltage of the tertiary voltage of resistance and the 6th resistance；
Second series circuit is controlled to switch to the 3rd preset state, collection the described 5th from second preset state
5th voltage of resistance and the 6th voltage of the 6th resistance；
According to the first voltage, the second voltage, the tertiary voltage, the 4th voltage, the 5th voltage
With the 6th voltage, the resistance of the 5th resistance and the resistance of the 6th resistance are obtained；
Whether the resistance of resistance and the 6th resistance according to the 5th resistance, determine the high voltage component to be detected
Insulation against ground.
Preferably, the resistance and the resistance of the 6th resistance according to the 5th resistance, determines described to be detected
High voltage component whether insulation against ground the step of, including：
When the resistance of the 5th resistance and the resistance of the 6th resistance are located in the range of preset resistive value, it is determined that described
High voltage component insulation against ground to be detected；
When the resistance of the 5th resistance and the resistance of the 6th resistance are not located in the range of preset resistive value, institute is determined
High voltage component to be detected is stated not insulate over the ground.
Preferably, the resistor detection method of the insulation detecting circuit also includes：
Second series circuit is conducted to the first preset state, second is switched to from first preset state and is preset
State and from second preset state switch to the 3rd preset state as one cycle operate, to second series electrical
Road performs preset loop number of operations；
The step of second voltage of the first voltage for gathering the 5th resistance and the 6th resistance, including：
It is separately recorded in and perform every time after control second series circuit is conducted to the operation of the first preset state, it is described
The voltage change slope of the voltage change slope of the 5th resistance and the 6th resistance is respectively less than what is passed through during the first preset value
The numerical value of first time period；
It is determined that the maximum of the first time period in the preset loop number of operations, will be in the very first time
The magnitude of voltage of the 5th resistance gathered when the numerical value of section is by maximum as the first voltage, and by the number of first time period
It is worth the magnitude of voltage of the 6th resistance gathered during by maximum as the second voltage.
Preferably, the step of four voltage of the tertiary voltage of collection the 5th resistance and the 6th resistance,
Including：
To be separately recorded in perform every time control second series circuit and switch to two from first preset state and preset
After the operation of state, the voltage change slope of the 5th resistance and the voltage change slope of the 6th resistance are respectively less than described
The numerical value of the second time period passed through during the second preset value；
It is determined that the maximum of the second time period in the preset loop number of operations, by second time period
The magnitude of voltage of the 5th resistance gathered when numerical value is by maximum is as the tertiary voltage, and by the numerical value of second time period
The magnitude of voltage of the 6th resistance gathered when maximum is used as the 4th voltage.
Preferably, the step of six voltage of the 5th voltage of collection the 5th resistance and the 6th resistance is wrapped
Include：
It is separately recorded in and perform every time control second series circuit and switch to the 3rd from the second preset state described in the
After the operation of preset state, the voltage change slope of the 5th resistance and the voltage change slope of the 6th resistance are respectively less than
The numerical value of the 3rd time period passed through during three preset values；
It is determined that the maximum of the 3rd time period in preset loop number of operations, will be most in the numerical value of the 3rd time period
The magnitude of voltage of the 5th resistance gathered when big is used as the 5th voltage, and is maximum when institute by the numerical value of the 3rd time period
The magnitude of voltage of the 6th resistance of collection is used as the 6th voltage.
Preferably, according to the first voltage, the second voltage, the tertiary voltage, the 4th voltage, described
Five voltages and the 6th voltage, by formula
The resistance of the 5th resistance is obtained, wherein, R1 is the resistance of first resistor, and R4 is the resistance of the 4th resistance, V1
It is the first voltage, it " is the 6th voltage that V2 is two voltage, V2；
And by formula
The resistance of the 6th resistance is obtained, wherein, R2 is the resistance of first resistor, and R3 is the resistance of 3rd resistor, V2
It is the second voltage, V1 ＇ are the tertiary voltage.
Compared with prior art, high voltage component insulation detecting circuit provided in an embodiment of the present invention and insulation detecting method,
At least have the advantages that：
By increased 4th series circuit and the control to the second series circuit, the high pressure of various can be matched
The Insulation monitoring of part, and so that the precision of the result for detecting is higher.
Brief description of the drawings
Fig. 1 is the structural representation of the high voltage component insulation detecting circuit described in first embodiment of the invention；
Fig. 2 is that the structure of the insulation detecting method of the high voltage component insulation detecting circuit described in second embodiment of the invention is shown
It is intended to.
Specific embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.In the following description, there is provided such as specific configuration is only with the specific detail of component
In order to help comprehensive understanding embodiments of the invention.Therefore, it will be apparent to those skilled in the art that can be to reality described herein
Example is applied to make various changes and modifications without deviating from scope and spirit of the present invention.In addition, for clarity and brevity, it is right to eliminate
The description of known function and construction.
First embodiment of the invention provides a kind of high voltage component insulation detecting circuit, including：
The first series circuit being connected with high voltage component to be detected；Be connected with the high voltage component to be detected, for controlling
Second series circuit of current trend, second series circuit is in parallel with first series circuit；With the height to be detected
3rd series circuit of splenium part connection, the 3rd series circuit is in parallel with second series circuit；It is to be detected with described
4th series circuit of high voltage component connection, the 4th series circuit is in parallel with the 3rd series circuit, and described first
One end of series circuit, second series circuit, the 3rd series circuit and the 4th series circuit is grounded.
By the control of the second series circuit in first embodiment so that the electric current of the high voltage component insulation detecting circuit
Trend is differed.Positive pole one end of high voltage component to be detected is connected as the total positive output of high pressure with the positive pole of other high voltage components,
Negative pole one end of high voltage component to be detected is connected as the total negative output of high pressure with the negative pole of other high voltage components.
In first embodiment of the invention, relative to high voltage component insulation detecting circuit of the prior art, the 4th is increased
Series circuit, the 4th series circuit is the condenser network that influence is produced on circuit, by increased electric capacity electricity in circuit
Road, enables to the high voltage component insulation detecting circuit in first embodiment of the invention to match the high voltage component of various
Insulation monitoring, and so that the precision of the result for detecting is higher.
What power supply in Fig. 1 was referred to is high voltage parts to be detected, by high voltage parts to be detected for circuit is carried out
Power supply.
Further, in first embodiment of the invention, reference picture 1, first series circuit includes：
The first resistor R1 and second resistance R2 of interconnection, one end of the first resistor R1 and the high pressure to be detected
Part is connected, and one end of the second resistance R2 is connected with the high voltage component to be detected, and the first resistor R1 and described
The other end of second resistance R2 is grounded.
Used as one group of known resistance, it is in order to in subsequent conditioning circuit that it sets purpose to first resistor R1 and second resistance R2
The acquisition of the resistance of resistance to be asked and be configured.
And further, in first embodiment of the invention, reference picture 1, second series circuit includes：
The 3rd resistor R3 and the 4th resistance R4 of interconnection, the first switch S1 being connected with the 3rd resistor R3, with
And the second switch S2 being connected with the 4th resistance R4；The first switch S1 respectively with the high voltage component to be detected and institute
First resistor R1 connections are stated, the second switch S2 is connected with the high voltage component to be detected and the second resistance R2 respectively,
And one end of the 3rd resistor R3 and the 4th resistance R4 are grounded.
Realize controlling the trend of electric current in circuit by being opened or closed for first switch S1 and second switch S2
System, and then realize being controlled in whether accessing circuit pathways to 3rd resistor R3 and the 4th resistance R4.Reference picture 1, when simultaneously
When being turned off to first switch S1 and second switch S2, the second series circuit disconnects the connection with whole circuit, electric current difference
The negative pole of high voltage component to be detected is flow back into by the first series circuit, the 3rd series circuit and the 4th series circuit, now,
In 3rd resistor R3 and the non-access channels of the 4th resistance R4；When being disconnected to first switch S1 closures, second switch S2, electric current
The negative pole for flowing back into be detected high voltage component is flowed to second resistance R2 and the 4th resistance R4 respectively by first resistor R1,
I.e., now, 3rd resistor R3 is not accessed, in the 4th resistance R4 access channels；Closed when to first switch S1 disconnections, second switch S2
During conjunction, electric current by second resistance R2 after first resistor R1 and 3rd resistor R3 respectively through flowing back into high voltage component to be detected
Negative pole, now, in 3rd resistor R3 access channels, and the 4th resistance R4 is then in non-access channel.
And further, in first embodiment of the invention, reference picture 1, the 3rd series circuit includes：
Be connected with each other the 5th resistance R5 and the 6th resistance R6, the 5th resistance R5 respectively with the high-voltage section to be detected
Part, the first resistor R1 and the first switch S1 connection, one end of the 6th resistance R6 respectively with the height to be detected
Splenium part, the second resistance R2 and the second switch S2 connection, the 5th resistance R5's and the 6th resistance R6 is another
One end is grounded.
5th resistance R5 is the total positive insulation against ground resistance in first embodiment of the invention, and the 6th resistance R6 is the present invention the
Always negative insulation against ground resistance in one embodiment, is controlled by the opening and closing to above-mentioned first switch S1 and second switch S2
System, finally tries to achieve the resistance of the 5th resistance R5 and the 6th resistance R6, and according to the resistance pair of the 5th resistance R5 and the 6th resistance R6
Whether insulation against ground is judged high voltage component to be detected.
And further, in first embodiment of the invention, reference picture 1, the 4th series circuit includes：
The the first electric capacity C1 and the second electric capacity C2 being connected with each other, one end of the first electric capacity C1 are to be detected with described respectively
High voltage component, the first resistor R1, the first switch S1 and the 5th resistance R5 connection, the one of the second electric capacity C2
End is connected with the high voltage component to be detected, the second resistance R2, the second switch S2 and the 6th resistance R6 respectively,
And the other end of the first electric capacity C1 and the second electric capacity C2 is grounded.
The setting purpose of the first electric capacity C1 and the second electric capacity C2 is the increased Y in order to during simulating vehicle environmental applications
Electric capacity or vehicle body electric capacity over the ground, numerical value according to real Y capacitance or the vehicle body measured electric capacity over the ground, can survey
Go out whether real high voltage component to be detected insulate over the ground in vehicle environment.
Reference picture 2, another aspect according to embodiments of the present invention, it is exhausted that the embodiment of the present invention additionally provides a kind of high voltage component
Edge detects circuit isolation detection method, including：
Step 1, controls second series circuit to be conducted to the first preset state, gathers the first voltage of the 5th resistance R5
With the second voltage of the 6th resistance R6.
Step 2, controls second series circuit to switch to the second preset state from first preset state, gathers institute
State the tertiary voltage of the 5th resistance R5 and the 4th voltage of the 6th resistance R6.
Step 3, controls second series circuit to switch to the 3rd preset state from second preset state, gathers institute
State the 5th voltage of the 5th resistance R5 and the 6th voltage of the 6th resistance R6.
Step 4, according to the first voltage, the second voltage, the tertiary voltage, the 4th voltage, described
Five voltages and the 6th voltage, obtain the resistance of the 5th resistance R5 and the resistance of the 6th resistance R6.
Step 5, the resistance of resistance and the 6th resistance R6 according to the 5th resistance R5, determines the height to be detected
Splenium part whether insulation against ground.
Specifically, the first preset state of the second series circuit in above-mentioned steps 1 refers to, by first switch S1 and second
The state that switch S2 disconnects, under this state, in the non-access channel of the second series circuit.
Second preset state of the second series circuit in above-mentioned steps 2 refers to open first switch S1 closures and second
The state that S2 disconnects is closed, under this state, 3rd resistor R3 access channels.
3rd preset state of the second series circuit in above-mentioned steps 3 refers to open second switch S2 closures and first
The state that S1 disconnects is closed, under this state, in the 4th resistance R4 access channels.
Cut under the first preset state, the second preset state and the 3rd preset state by by the second series circuit
Change, the magnitude of voltage of the 5th resistance R5 and the 6th resistance R6 under three kinds of states can be obtained, further according to bridge balance principle, just may be used
In the hope of the resistance of the 5th resistance R5 and the 6th resistance R6.
In above-mentioned steps 1 to step 3, to obtaining for the magnitude of voltage of the 5th resistance R5 and the 6th resistance R6 under different conditions
Takes be that after operation is performed to the second series circuit, magnitude of voltage is in what is be acquired when stablizing.Magnitude of voltage is in steady herein
Timing is meant that, for example, after disconnected to first switch S1 and second switch S2, to power on circuitry, now, the 5th electricity
The voltage at resistance R5 two ends can start from scratch rising up to stabilization, that is, the voltage change slope at the 5th resistance R5 two ends is less than
During certain value, that is, think the voltage change slope stabilization at the 5th resistance R5 two ends.
And further, in second embodiment of the invention, in steps of 5, the resistance according to the 5th resistance R5
With the resistance of the 6th resistance R6, determine the high voltage component to be detected whether insulation against ground the step of, including：
When the resistance of the 5th resistance R5 and the resistance of the 6th resistance R6 are located in the range of preset resistive value, it is determined that
The high voltage component insulation against ground to be detected；
When the resistance of the 5th resistance R5 and the resistance of the 6th resistance R6 are not located in the range of preset resistive value, really
The fixed high voltage component to be detected does not insulate over the ground.
Herein, preset resistive value scope is specified according to actual test, by the 5th resistance R5's and the 6th resistance R6
Resistance size, in that context it may be convenient to determine the high voltage component to be detected whether insulation against ground.
And further, in second embodiment of the invention, the resistor detection method of the insulation detecting circuit also includes：
Second series circuit is conducted to the first preset state, second is switched to from first preset state and is preset
State and from second preset state switch to the 3rd preset state as one cycle operate, to second series electrical
Road performs preset loop number of operations；
Now, in above-mentioned step 1, the first voltage of collection the 5th resistance R5 and the second of the 6th resistance R6
The step of voltage, including：
It is separately recorded in and perform every time after control second series circuit is conducted to the operation of the first preset state, it is described
The voltage change slope of the voltage change slope of the 5th resistance R5 and the 6th resistance R6 is passed through when being respectively less than the first preset value
The numerical value of the first time period crossed；
It is determined that the maximum of the first time period in the preset loop number of operations, will be in the very first time
The magnitude of voltage of the 5th resistance R5 gathered when the numerical value of section is by maximum as the first voltage, and by first time period
The magnitude of voltage of the 6th resistance R6 gathered when numerical value is by maximum is used as the second voltage.
And further, in second embodiment of the invention, in step 3, the 3rd of collection the 5th resistance R5 the
The step of four voltage of voltage and the 6th resistance R6, including：
To be separately recorded in perform every time control second series circuit and switch to two from first preset state and preset
After the operation of state, the voltage change slope of the 5th resistance R5 and the voltage change slope of the 6th resistance R6 are respectively less than
The numerical value of the second time period passed through during second preset value；
It is determined that the maximum of the second time period in the preset loop number of operations, by second time period
The magnitude of voltage of the 5th resistance R5 gathered when numerical value is by maximum as the tertiary voltage, and by the numerical value of second time period
The magnitude of voltage of the 6th resistance R6 gathered during by maximum is used as the 4th voltage.
And further, in second embodiment of the invention, in step 3, the 5th of collection the 5th resistance R5 the
The step of six voltage of voltage and the 6th resistance R6, includes：
It is separately recorded in and perform every time control second series circuit and switch to the 3rd from the second preset state described in the
After the operation of preset state, the voltage change slope of the 5th resistance R5 and the voltage change slope of the 6th resistance R6 are equal
The numerical value of the 3rd time period passed through during less than three preset values；
It is determined that the maximum of the 3rd time period in preset loop number of operations, will be most in the numerical value of the 3rd time period
The magnitude of voltage of the 5th resistance R5 gathered when big as the 5th voltage, and by the numerical value of the 3rd time period for it is maximum when
The magnitude of voltage of the 6th resistance R6 for being gathered is used as the 6th voltage.
The above-mentioned purpose that preset loop number of operations is performed to the second series circuit is to improve to the 5th resistance R5
The acquisition precision of the magnitude of voltage at the magnitude of voltage at two ends and the 6th resistance R6 two ends, and then improve the 5th resistance R5 and the 6th for obtaining
The resistance accuracy of resistance R6.
And further, in second embodiment of the invention, in step 4, according to the first voltage, second electricity
Pressure, the tertiary voltage, the 4th voltage, the 5th voltage and the 6th voltage, by formula
The resistance of the 5th resistance R5 is obtained, wherein, R1 is the resistance of first resistor R1, and R4 is the resistance of the 4th resistance R4
Value, V1 is the first voltage, and it " is the 6th voltage that V2 is two voltage, V2；
And by formula
The resistance of the 6th resistance R6 is obtained, wherein, R2 is the resistance of first resistor R2, and R3 is the resistance of 3rd resistor R3
Value, V2 is the second voltage, and V1 ＇ are the tertiary voltage.
First, make
S1, S2 are disconnected, can be obtained：
Closure S1, disconnects S2, can obtain：
V1+V2=V1 ＇+V2 ＇ (5)
According to formula (2), formula ((3), formula ((4), formula ((5), it can be deduced that：
Closure S2, disconnects S1, can obtain：
V1+V2=V1 ＂+V2 ＂ (7)
According to formula (1), formula (3), formula (6), formula (7), it can be deduced that：
The insulation detecting method of the high voltage component insulation detecting circuit provided by second embodiment of the invention, can match
The Insulation monitoring of the high voltage component of different automobile types, and the precision of Insulation monitoring can also be improved.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (11)
1. a kind of high voltage component insulation detecting circuit, it is characterised in that including：
The first series circuit being connected with high voltage component to be detected；
The second series circuit for being connected with the high voltage component to be detected, being moved towards for control electric current, second series circuit
It is in parallel with first series circuit；
The 3rd series circuit being connected with the high voltage component to be detected, the 3rd series circuit and second series circuit
It is in parallel；
The 4th series circuit being connected with the high voltage component to be detected, the 4th series circuit and the 3rd series circuit
Parallel connection, and first series circuit, second series circuit, the 3rd series circuit and the 4th series circuit
One end is grounded.
2. high voltage component insulation detecting circuit according to claim 1, it is characterised in that the first series circuit bag
Include：
The first resistor (R1) and second resistance (R2) of interconnection, one end and the height to be detected of the first resistor (R1)
Splenium part is connected, and one end of the second resistance (R2) is connected with the high voltage component to be detected, and the first resistor (R1)
The other end with the second resistance (R2) is grounded.
3. high voltage component insulation detecting circuit according to claim 2, it is characterised in that the second series circuit bag
Include：
The 3rd resistor (R3) and the 4th resistance (R4) of interconnection, the first switch being connected with the 3rd resistor (R3)
(S1) second switch (S2), and with the 4th resistance (R4) being connected；The first switch (S1) is to be checked with described respectively
Survey high voltage component and the first resistor (R1) connection, the second switch (S2) respectively with the high voltage component to be detected and institute
Second resistance (R2) connection is stated, and one end of the 3rd resistor (R3) and the 4th resistance (R4) is grounded.
4. high voltage component insulation detecting circuit according to claim 3, it is characterised in that the 3rd series circuit bag
Include：
Be connected with each other the 5th resistance (R5) and the 6th resistance (R6), the 5th resistance (R5) respectively with the high pressure to be detected
The connection of part, the first resistor (R1) and the first switch (S1), one end of the 6th resistance (R6) respectively with it is described
The connection of high voltage component to be detected, the second resistance (R2) and the second switch (S2), the 5th resistance (R5) and described
The other end of the 6th resistance (R6) is grounded.
5. high voltage component insulation detecting circuit according to claim 4, it is characterised in that the 4th series circuit bag
Include：
The first electric capacity (C1) and the second electric capacity (C2) being connected with each other, one end of first electric capacity (C1) are to be checked with described respectively
Survey the connection of high voltage component, the first resistor (R1), the first switch (S1) and the 5th resistance (R5), second electricity
Hold the one end of (C2) respectively with the high voltage component to be detected, the second resistance (R2), the second switch (S2) and described
6th resistance (R6) is connected, and the other end of first electric capacity (C1) and second electric capacity (C2) is grounded.
6. a kind of insulation detecting method of high voltage component insulation detecting circuit, is applied to described in any one of the claims 1 to 5
Insulation detecting circuit, it is characterised in that including：
Control second series circuit to be conducted to the first preset state, gather the first voltage and the 6th electricity of the 5th resistance (R5)
Hinder the second voltage of (R6)；
Control second series circuit to switch to the second preset state from first preset state, gather the 5th resistance
(R5) tertiary voltage and the 4th voltage of the 6th resistance (R6)；
Control second series circuit to switch to the 3rd preset state from second preset state, gather the 5th resistance
(R5) the 5th voltage and the 6th voltage of the 6th resistance (R6)；
According to the first voltage, the second voltage, the tertiary voltage, the 4th voltage, the 5th voltage and institute
The 6th voltage is stated, the resistance of the 5th resistance (R5) and the resistance of the 6th resistance (R6) is obtained；
The resistance of resistance and the 6th resistance (R6) according to the 5th resistance (R5), determines the high voltage component to be detected
Whether insulation against ground.
7. the insulation detecting method of high voltage component insulation detecting circuit according to claim 6, it is characterised in that described
According to the resistance and the resistance of the 6th resistance (R6) of the 5th resistance (R5), determine whether the high voltage component to be detected is right
The step of ground insulation, including：
When the resistance of the 5th resistance (R5) and the resistance of the 6th resistance (R6) are located in the range of preset resistive value, it is determined that
The high voltage component insulation against ground to be detected；
When the resistance of the 5th resistance (R5) and the resistance of the 6th resistance (R6) are not located in the range of preset resistive value, really
The fixed high voltage component to be detected does not insulate over the ground.
8. the insulation detecting method of high voltage component insulation detecting circuit according to claim 6, it is characterised in that it is described absolutely
The resistor detection method of edge detection circuit also includes：
Second series circuit is conducted to the first preset state, the second preset state is switched to from first preset state
And the 3rd preset state is switched to as one cycle operation from second preset state, second series circuit is held
Row preset loop number of operations；
The step of second voltage of the first voltage for gathering the 5th resistance (R5) and the 6th resistance (R6), including：
It is separately recorded in and perform every time after control second series circuit is conducted to the operation of the first preset state, the described 5th
The voltage change slope of the voltage change slope of resistance (R5) and the 6th resistance (R6) is passed through when being respectively less than the first preset value
The numerical value of the first time period crossed；
It is determined that the maximum of the first time period in the preset loop number of operations, by the first time period
The magnitude of voltage of the 5th resistance (R5) gathered when numerical value is by maximum as the first voltage, and by the number of first time period
It is worth the magnitude of voltage of the 6th resistance (R6) gathered during by maximum as the second voltage.
9. the insulation detecting method of high voltage component insulation detecting circuit according to claim 8, it is characterised in that described to adopt
Collect the 5th resistance (R5) tertiary voltage and the 6th resistance (R6) four voltage the step of, including：
To be separately recorded in perform every time controls second series circuit to switch to two preset states from first preset state
Operation after, the voltage change slope of the 5th resistance (R5) and the voltage change slope of the 6th resistance (R6) are respectively less than
The numerical value of the second time period passed through during second preset value；
It is determined that the maximum of the second time period in the preset loop number of operations, by the numerical value of second time period
The magnitude of voltage of the 5th resistance (R5) gathered during by maximum is as the tertiary voltage, and by the numerical value of second time period
The magnitude of voltage of the 6th resistance (R6) gathered when maximum is used as the 4th voltage.
10. the insulation detecting method of high voltage component insulation detecting circuit according to claim 9, it is characterised in that described
Gather the 5th resistance (R5) the 5th voltage and the 6th resistance (R6) six voltage the step of include：
To be separately recorded in perform every time control second series circuit and switch to the 3rd from the second preset state described in the and preset
After the operation of state, the voltage change slope of the 5th resistance (R5) and the voltage change slope of the 6th resistance (R6) are equal
The numerical value of the 3rd time period passed through during less than three preset values；
It is determined that the maximum of the 3rd time period in preset loop number of operations, by when the numerical value of the 3rd time period is for maximum
The magnitude of voltage of the 5th resistance (R5) for being gathered is used as the 5th voltage, and is maximum when institute by the numerical value of the 3rd time period
The magnitude of voltage of the 6th resistance (R6) of collection is used as the 6th voltage.
The insulation detecting method of 11. high voltage component insulation detecting circuits according to claim 6, it is characterised in that according to
The first voltage, the second voltage, the tertiary voltage, the 4th voltage, the 5th voltage and the 6th electricity
Pressure, by formula
The resistance of the 5th resistance (R5) is obtained, wherein, R1 is the resistance of first resistor (R1), and R4 is the 4th resistance (R4)
Resistance, V1 is the first voltage, and it " is the 6th voltage that V2 is two voltage, V2；
And by formula
The resistance of the 6th resistance (R6) is obtained, wherein, R2 is the resistance of first resistor (R2), and R3 is 3rd resistor (R3)
Resistance, V2 is the second voltage, and V1 ＇ are the tertiary voltage.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329014A (en) * | 2017-06-29 | 2017-11-07 | 北京新能源汽车股份有限公司 | High-voltage plug connector fault detection method and device |
| CN107991625A (en) * | 2017-11-29 | 2018-05-04 | 四川长虹电器股份有限公司 | Power accumulator system insulating resistance detection circuit and detection method |
| CN109799443A (en) * | 2019-01-31 | 2019-05-24 | 中国北方车辆研究所 | A kind of adaptive insulation detecting method of distribution capacity based on electric vehicle |
| CN110398633A (en) * | 2019-09-03 | 2019-11-01 | 北京新能源汽车技术创新中心有限公司 | A kind of insulation impedance detection method of electric car |
| CN111722069A (en) * | 2020-06-30 | 2020-09-29 | 蜂巢能源科技有限公司 | Selection method, device, medium and equipment of sampling resistor of insulation detection circuit |
| CN111929500A (en) * | 2019-05-13 | 2020-11-13 | 上海海拉电子有限公司 | Y-capacitor balance detection method, system and circuit |
| WO2022007822A1 (en) * | 2020-07-08 | 2022-01-13 | 中国第一汽车股份有限公司 | Electric vehicle insulation fault detection method and device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1289094A1 (en) * | 2001-08-29 | 2003-03-05 | Omron Corporation | Short-circuit detector |
| CN201886117U (en) * | 2010-09-29 | 2011-06-29 | 京滨电子装置研究开发(上海)有限公司 | Insulation detection circuit of electrically-propelled vehicle |
| CN202230137U (en) * | 2011-10-18 | 2012-05-23 | 上海恒动汽车电池有限公司 | Power cell insulation detection system for electric automobile |
| CN102759693A (en) * | 2011-04-28 | 2012-10-31 | 比亚迪股份有限公司 | Insulation detection circuit, inverter and insulation detection method thereof |
| CN102841284A (en) * | 2011-06-22 | 2012-12-26 | 同济大学 | On-line insulated monitoring method for high voltage of electromobile |
| CN103597364A (en) * | 2011-06-01 | 2014-02-19 | 原子能和替代能源委员会 | Device for detecting a defect in insulation |
| CN104714152A (en) * | 2013-12-11 | 2015-06-17 | 北汽福田汽车股份有限公司 | High-voltage insulation monitoring circuit and high-voltage insulation monitoring method for electric vehicles |
| CN106226670A (en) * | 2016-09-05 | 2016-12-14 | 深圳市沛城电子科技有限公司 | The insulation detecting circuit of electric automobile and method |
| CN106353695A (en) * | 2016-10-24 | 2017-01-25 | 郑州云海信息技术有限公司 | Device and method for detecting insulation against ground fault of direct-current power source |
-
2017
- 2017-02-24 CN CN201710103164.0A patent/CN106841962A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1289094A1 (en) * | 2001-08-29 | 2003-03-05 | Omron Corporation | Short-circuit detector |
| CN201886117U (en) * | 2010-09-29 | 2011-06-29 | 京滨电子装置研究开发(上海)有限公司 | Insulation detection circuit of electrically-propelled vehicle |
| CN102759693A (en) * | 2011-04-28 | 2012-10-31 | 比亚迪股份有限公司 | Insulation detection circuit, inverter and insulation detection method thereof |
| CN103597364A (en) * | 2011-06-01 | 2014-02-19 | 原子能和替代能源委员会 | Device for detecting a defect in insulation |
| CN102841284A (en) * | 2011-06-22 | 2012-12-26 | 同济大学 | On-line insulated monitoring method for high voltage of electromobile |
| CN202230137U (en) * | 2011-10-18 | 2012-05-23 | 上海恒动汽车电池有限公司 | Power cell insulation detection system for electric automobile |
| CN104714152A (en) * | 2013-12-11 | 2015-06-17 | 北汽福田汽车股份有限公司 | High-voltage insulation monitoring circuit and high-voltage insulation monitoring method for electric vehicles |
| CN106226670A (en) * | 2016-09-05 | 2016-12-14 | 深圳市沛城电子科技有限公司 | The insulation detecting circuit of electric automobile and method |
| CN106353695A (en) * | 2016-10-24 | 2017-01-25 | 郑州云海信息技术有限公司 | Device and method for detecting insulation against ground fault of direct-current power source |
Non-Patent Citations (1)
| Title |
|---|
| 王佳: "纯电动汽车能量管理关键技术及高压安全策略研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329014A (en) * | 2017-06-29 | 2017-11-07 | 北京新能源汽车股份有限公司 | High-voltage plug connector fault detection method and device |
| CN107991625A (en) * | 2017-11-29 | 2018-05-04 | 四川长虹电器股份有限公司 | Power accumulator system insulating resistance detection circuit and detection method |
| CN109799443A (en) * | 2019-01-31 | 2019-05-24 | 中国北方车辆研究所 | A kind of adaptive insulation detecting method of distribution capacity based on electric vehicle |
| CN109799443B (en) * | 2019-01-31 | 2021-04-06 | 中国北方车辆研究所 | Distributed capacitance self-adaptive insulation detection method based on electric vehicle |
| CN111929500A (en) * | 2019-05-13 | 2020-11-13 | 上海海拉电子有限公司 | Y-capacitor balance detection method, system and circuit |
| CN111929500B (en) * | 2019-05-13 | 2023-01-03 | 上海海拉电子有限公司 | Y-capacitor balance detection method, system and circuit |
| CN110398633A (en) * | 2019-09-03 | 2019-11-01 | 北京新能源汽车技术创新中心有限公司 | A kind of insulation impedance detection method of electric car |
| CN110398633B (en) * | 2019-09-03 | 2021-07-30 | 北京新能源汽车技术创新中心有限公司 | Insulation impedance detection method for electric automobile |
| CN111722069A (en) * | 2020-06-30 | 2020-09-29 | 蜂巢能源科技有限公司 | Selection method, device, medium and equipment of sampling resistor of insulation detection circuit |
| CN111722069B (en) * | 2020-06-30 | 2023-09-22 | 蜂巢能源科技股份有限公司 | Insulation detection circuit sampling resistor selection method, device, medium and equipment |
| WO2022007822A1 (en) * | 2020-07-08 | 2022-01-13 | 中国第一汽车股份有限公司 | Electric vehicle insulation fault detection method and device |
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Application publication date: 20170613 |