CN109298292A - A kind of resistance adjustment system and insulation fault analogy method - Google Patents
A kind of resistance adjustment system and insulation fault analogy method Download PDFInfo
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- CN109298292A CN109298292A CN201811030563.XA CN201811030563A CN109298292A CN 109298292 A CN109298292 A CN 109298292A CN 201811030563 A CN201811030563 A CN 201811030563A CN 109298292 A CN109298292 A CN 109298292A
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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
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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
Abstract
The present invention provides a kind of resistance adjustment system and insulation fault analogy method, the both ends of resistance adjustment system connect the anode and ground terminal or cathode and ground terminal of object to be measured, and it is formed and is opened a way between anode and ground terminal or cathode and ground terminal, resistance adjustment system includes the adjustable resistance network of plural serial stage sub-network composition, each sub-network includes a single-pole double-throw switch (SPDT) and a resistance, non-moving end connection higher level's sub-network of single-pole double-throw switch (SPDT) or the first connecting wire, first moved end connects resistance first end, second moved end connects non-moving end or the second connecting wire of the single-pole double-throw switch (SPDT) of junior's sub-network with resistance second end；And the controller being connect with each single-pole double-throw switch (SPDT)；Relay connected to the controller is equipped between resistance adjustment system and object to be measured, the open-circuit condition of object to be measured corresponds to first or second resistance, adjustable resistance network and first or second resistor coupled in parallel.The configuration of the present invention is simple is low in cost, can cooperate with object to be measured and realize fault simulation.
Description
Technical field
The present invention relates to electric vehicle engineering field more particularly to a kind of resistance adjustment system and insulation fault simulation sides
Method.
Background technique
As resource and environmental problem are on the rise, electric automobile market occupancy volume increases year by year.Object to be measured is electronic
The power source of automobile, when high-power component, are required to high drive, can be to entire if Insulation Problems occurs in object to be measured
The electrical appliance of high tension loop damages, and therefore, when design will have corresponding control strategy to be handled, and guarantees electrical appliance and multiplies
The safety of vehicle personnel.
For Insulation test, need whether access control system is protected when Insulation Problems occurs in high-pressure system
Processing, if not increasing ancillary equipment, needs to destroy dynamical system, produces corresponding failure, but such cost
It is very high, it is unfavorable for the reuse of components.
Summary of the invention
The embodiment of the present invention provides a kind of resistance adjustment system and insulation fault analogy method, high in the prior art to solve
The higher cost for pressing the test of system insulation failure is unfavorable for the problem of components are reused.
The embodiment of the present invention provides a kind of resistance adjustment system, first end and the object to be measured of the resistance adjustment system
Positive terminal or negative pole end connection, the second end of the resistance adjustment system is connect with the ground terminal of object to be measured, and object to be measured
Open-circuit condition is formed between positive terminal and ground terminal or between negative pole end and ground terminal, the resistance adjustment system includes:
Adjustable resistance network, the adjustable resistance network include the multistage sub-network being connected in series, and every grade of sub-network includes one
Single-pole double-throw switch (SPDT) and a resistance, the non-moving end of the single-pole double-throw switch (SPDT) of current sub network network are connected to upper level sub-network or first
Connecting wire, the first moved end are connected to the first end of the resistance, and the second end of the second moved end and the resistance is connected to down
The non-moving end of the single-pole double-throw switch (SPDT) of primary subnet network or the second connecting wire；And
The controller connecting with the single-pole double-throw switch (SPDT) of every grade of sub-network, the single-pole double-throw switch (SPDT) is according to the controller
Control instruction carry out state switching；
It is provided with the control resistance adjustment system between the resistance adjustment system and object to be measured and object to be measured connects
The relay of state is connect, and the relay is connect with the controller, state switching is carried out according to the control of the controller；
Wherein, the open-circuit condition between the positive terminal and ground terminal of object to be measured corresponds to first resistor, object to be measured
Open-circuit condition between negative pole end and ground terminal corresponds to second resistance, and the adjustable resistance network and the first resistor are simultaneously
Connection or the adjustable resistance network are in parallel with the second resistance.
Preferably, the second moved end of the single-pole double-throw switch (SPDT) of the current sub network network is connected to institute by third connecting wire
State non-moving end or the second connecting wire of the single-pole double-throw switch (SPDT) of next stage sub-network；
The second end of the resistance of the current sub network network is connected directly to the single-pole double-throw switch (SPDT) of the next stage sub-network
Non-moving end or the second connecting wire.
Preferably, the single-pole double-throw switch (SPDT) includes controlling the resistance of the current sub network network to be serially connected with the adjustable resistance
The second state that the first state of network and the resistance of the control current sub network network are shorted；
In said first condition, the of the resistance of the first moved end of the single-pole double-throw switch (SPDT) and the current sub network network
One end connection, in said second condition, the hilted broadsword of the second moved end of the single-pole double-throw switch (SPDT) and the next stage sub-network
The non-moving end of commutator or the connection of the second connecting wire.
Preferably, when the controller sends the first control instruction, the single-pole double-throw switch (SPDT) is in first state；When
When the controller sends the second control instruction, the single-pole double-throw switch (SPDT) is in the second state.
Preferably, the resistance value for the resistance that every grade of sub-network is included is all different, and the multistage sub-network being connected in series is wrapped
The resistance value of the resistance contained changes according to predetermined gradient.
Preferably, the resistance value for the resistance that the multistage sub-network being connected in series is included is 2NOhm, wherein N is to be greater than or wait
In 0 integer, and the value of N is sequentially increased or subtracts along the direction of first connecting wire to second connecting wire
It is small.
Preferably, the first connecting wire of the resistance adjustment system is connected to the positive terminal or negative pole end of object to be measured,
Second connecting wire of the resistance adjustment system is connected to the ground terminal of object to be measured；
The relay is set between first connecting wire and object to be measured, or is set to second connection
Between conducting wire and object to be measured.
The present invention provides a kind of insulation fault analogy method, applied to above-mentioned resistance adjustment system, which comprises
In the state that the relay is in and disconnects, is obtained by the controller and carry the required adjustable electric
Hinder the regulating command of the resistance value of network；
The resistance value of the adjustable resistance network is adjusted according to the regulating command；
It controls the relay and switches to closed state；
Wherein, the corresponding first resistor of open-circuit condition between the positive terminal of object to be measured and ground terminal corresponds to the first resistance
Value, the corresponding second resistance of open-circuit condition between the negative pole end and ground terminal of object to be measured corresponds to the second resistance value, after adjusting
The resistance value of the adjustable resistance network and the parallel value of first resistance value be equivalent to positive terminal and the ground connection of object to be measured
Insulating resistance value between end, the resistance value of the adjustable resistance network after adjusting and the parallel value of second resistance value are of equal value
Insulating resistance value between the negative pole end and ground terminal of object to be measured.
Preferably, the single-pole double-throw switch (SPDT) includes controlling the resistance of the current sub network network to be serially connected with the adjustable resistance
The second state that the first state of network and the resistance of the control current sub network network are shorted, the sub-network institute that multistage is connected in series
The resistance value for the resistance for including is all different, and is 2NOhm, N are the integer more than or equal to 0；
The step of resistance value that the adjustable resistance network is adjusted according to the regulating command, comprising:
According to the regulating command, determination can be serially connected with the target electricity of the adjustable resistance network in multiple resistance
Resistance；
It controls the corresponding single-pole double-throw switch (SPDT) of the target resistance and is in first state.
Preferably, the step of control relay switches to closed state, comprising:
Close command is sent to the relay, the relay is controlled by off-state and switches to closed state.
Technical solution of the present invention is adjusted the state of the single-pole double-throw switch (SPDT) of sub-networks at different levels by controller, and then adjusted
The resistance value of adjustable resistance network reaches the shape of triggering report insulation fault by the cooperation of resistance adjustment system and object to be tested
State realizes the purpose of insulation fault simulation, and resistance adjustment system structure of the invention is simple, is easily achieved resistance value adjusts, opens
It is short to send out the period, while may be implemented to have saved testing cost from the cooperation of different objects to be tested.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 shows resistance adjustment of embodiment of the present invention systems and relay connection schematic diagram；
Fig. 2 indicates adjustable resistance of embodiment of the present invention network diagram；
Fig. 3 indicates insulation fault of embodiment of the present invention analogy method schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of resistance adjustment system, the anode of the first end of resistance adjustment system and object to be measured
End or negative pole end connection, the second end of resistance adjustment system connect with the ground terminal of object to be measured, and object positive terminal to be measured and
Open-circuit condition is formed between ground terminal or between negative pole end and ground terminal, as depicted in figs. 1 and 2, resistance adjustment system includes:
Adjustable resistance network 1, adjustable resistance network 1 include the multistage sub-network 11 being connected in series, and every grade of sub-network 11 includes
One single-pole double-throw switch (SPDT) 111 and a resistance 112, the non-moving end of the single-pole double-throw switch (SPDT) 111 of current sub network network 11 are connected to one
Grade sub-network 11 or the first connecting wire 12, the first moved end are connected to the first end of resistance 112, the second moved end and resistance 112
Second end is connected to non-moving end or the second connecting wire 13 of the single-pole double-throw switch (SPDT) 111 of next stage sub-network 11；And with
The controller 2 that the single-pole double-throw switch (SPDT) 111 of every grade of sub-network 11 connects, single-pole double-throw switch (SPDT) 111 refer to according to the control of controller 2
Enable carry out state switching；
Control resistance adjustment system and object connection status to be measured are provided between resistance adjustment system and object to be measured
Relay 3, and relay 3 is connect with controller 2, carries out state switching according to the control of controller 2；
Wherein, the open-circuit condition between the positive terminal and ground terminal of object to be measured corresponds to first resistor, object to be measured
Open-circuit condition between negative pole end and ground terminal corresponds to second resistance, and adjustable resistance network 1 is in parallel with first resistor, Huo Zheke
Adjust resistor network 1 in parallel with second resistance.
The first end of resistance adjustment system provided in an embodiment of the present invention is connect with the positive terminal of object to be measured, resistance adjustment
The second end of system is connect with the ground terminal of object to be measured or the negative pole end of the first end of resistance adjustment system and object to be measured
Connection, the second end of resistance adjustment system are connect with the ground terminal of object to be measured.Between the positive terminal and ground terminal of object to be measured
It is formed between open-circuit condition or the negative pole end and ground terminal of object to be measured and forms open-circuit condition, be wherein not shown in Fig. 1 to be measured
Object.
Resistance adjustment system includes: adjustable resistance network 1 and controller 2, wherein controller 2 and adjustable resistance network 1
Connection, by the connection of controller 2 and adjustable resistance network 1, may be implemented to be adjusted the resistance value of adjustable resistance network 1.
Adjustable resistance network 1 includes that (wherein Level 3 subsidiary network illustrated in fig. 2 is only that one kind is enumerated to multilevel subnetwork network 11
The quantity of situation, sub-network can be set according to use demand), and be connected in series between multilevel subnetwork network 11, every primary subnet
Network 11 includes a single-pole double-throw switch (SPDT) 111 and the resistance 112 with the cooperation of single-pole double-throw switch (SPDT) 111.
First connecting wire 12 and the second connecting wire 13 are respectively arranged at the both ends of adjustable resistance network 1, with adjustable electric
Network 1 is hindered to connect.Wherein adjustable resistance network 1 be located at the two-stage sub-network 11 at both ends respectively with the first connecting wire 12 and second
Connecting wire 13 connects.
It is a moved end that wherein the first moved end and the second moved end of single-pole double-throw switch (SPDT) 111 are practical, in order to distinguish different shapes
Moved end is referred to as the first moved end or the second moved end by the connection of state, is connect in moved end with the first end of current resistance 112
When, moved end is the first moved end, connect and leads with the non-moving end of the single-pole double-throw switch (SPDT) 111 of next stage sub-network 11 or second in moved end
When line 13 connects, moved end is the second moved end.
For the sub-network 11 connecting with the first connecting wire 12, the non-moving end of single-pole double-throw switch (SPDT) 111 is connected to
First connecting wire 12 is maintained at working condition one of in the first moved end and the second moved end of single-pole double-throw switch (SPDT) 111,
If the first moved end is maintained at working condition, the first moved end is connected directly to the first end of the resistance 112 of current sub network network 11, if
Second moved end is maintained at working condition, then the second moved end is connected to the motionless of the single-pole double-throw switch (SPDT) 111 of next stage sub-network 11
End, the second end of the resistance 112 of current sub network network 11 are connected to the motionless of the single-pole double-throw switch (SPDT) 111 of next stage sub-network 11
End.
For the sub-network 11 connecting with the second connecting wire 13, the non-moving end of single-pole double-throw switch (SPDT) 111 is connected to
Upper level sub-network 11 specifically can be connected to the second end of the resistance 112 of upper level sub-network 11, single-pole double-throw switch (SPDT) 111
It is maintained at working condition one of in first moved end and the second moved end, if the first moved end is maintained at working condition, first
Moved end is connected directly to the first end of the resistance 112 of current sub network network 11, if the second moved end is maintained at working condition, second is dynamic
End is connected to the second connecting wire 13, and the second end of the resistance 112 of current sub network network 11 is connected to the second connecting wire 13.
For the sub-network 11 not connect with the first connecting wire 12 or the second connecting wire 13, single-pole double-throw switch (SPDT)
111 non-moving end is connected to upper level sub-network 11, specifically can be connected to the second end of the resistance 112 of upper level sub-network 11,
It is maintained at working condition one of in the first moved end and the second moved end of single-pole double-throw switch (SPDT) 111, if the first moved end is kept
In working condition, then the first moved end is connected directly to the first end of the resistance 112 of current sub network network 11, if the second moved end is maintained at
Working condition, then the second moved end is connected to the non-moving end of the single-pole double-throw switch (SPDT) 111 of next stage sub-network 11, current sub network network 11
Resistance 112 second end be connected to next stage sub-network 11 single-pole double-throw switch (SPDT) 111 non-moving end.
Wherein, the hilted broadsword of the connection of controller 2 and adjustable resistance network 1, specially controller 2 and sub-networks 11 at different levels is double
Throw switch 111 connects, and by the connection of single-pole double-throw switch (SPDT) 111 and controller 2, may be implemented to control list using controller 2
First moved end of double-pole double throw switch 111 or the working condition of the second moved end.
Relay 3 is provided between resistance adjustment system and object to be measured, wherein relay 3 is connect with controller 2, according to
The control of controller 2 turns off or the switching of closed state.When controller 2 controls relay 3 and disconnects, resistance adjustment system
System object to be measured between be in not-connected status, controller 2 control relay 3 be closed when, resistance adjustment system with it is to be measured
Connection status is between object.
Open-circuit condition between the positive terminal and ground terminal of object to be measured corresponds to first resistor, the negative pole end of object to be measured
Open-circuit condition between ground terminal corresponds to second resistance.It opens a way for being formed between the positive terminal and ground terminal of object to be measured
State for, adjustable resistance network 1 is in parallel with first resistor；It is opened for being formed between the negative pole end and ground terminal of object to be measured
For the state on road, adjustable resistance network 1 is in parallel with second resistance.
The embodiment of the present invention adjusts the state of the single-pole double-throw switch (SPDT) of sub-networks at different levels by controller, and then adjusts adjustable
The resistance value of resistor network, by the state of controller regulating relay, so that the cooperation of resistance adjustment system and object to be tested,
The state for reaching triggering report insulation fault, realizes the purpose of insulation fault simulation.
And resistance adjustment system provided in an embodiment of the present invention, structure is simple, is easily achieved resistance value is adjusted, the development cycle
It is short, at the same by controller adjust adjustable resistance network resistance value, may be implemented with the cooperation of different objects to be tested, saving
Testing cost.
In embodiments of the present invention, as depicted in figs. 1 and 2, the second of the single-pole double-throw switch (SPDT) 111 of current sub network network 11 is dynamic
End by third connecting wire 14 be connected to next stage sub-network 11 single-pole double-throw switch (SPDT) 111 non-moving end or second connection lead
Line 13；The second end of the resistance 112 of current sub network network 11 is connected directly to the single-pole double-throw switch (SPDT) 111 of next stage sub-network 11
Non-moving end or the second connecting wire 13.
Second moved end of the single-pole double-throw switch (SPDT) 111 of current sub network network 11 and the single-pole double-throw switch (SPDT) of next stage sub-network 11
It when 111 non-moving end or the second connecting wire 13 connect, can be attached by third connecting wire 14, i.e. third connection is led
One end of line 14 is connect with the second moved end of single-pole double-throw switch (SPDT) 111, and the hilted broadsword that the other end is connected to next stage sub-network 11 is double
The non-moving end of throw switch 111 or the second connecting wire 13.
For the resistance 112 of current sub network network 11, the first end of resistance 112 be can connect to current sub network network 11
First moved end of single-pole double-throw switch (SPDT) 111, second end are connected directly to the single-pole double-throw switch (SPDT) 111 of next stage sub-network 11 not
Moved end or the second connecting wire 13.
In embodiments of the present invention, single-pole double-throw switch (SPDT) 111 includes that be serially connected with can for the resistance 112 of control current sub network network 11
The second state that the first state for adjusting resistor network 1 and the resistance 112 for controlling current sub network network 11 are shorted；In first state
Under, the first end of the resistance 112 of the first moved end and current sub network network 11 of single-pole double-throw switch (SPDT) 111 is connect, in the second condition,
The non-moving end of the single-pole double-throw switch (SPDT) 111 of the second moved end and next stage sub-network 11 of single-pole double-throw switch (SPDT) 111 second is connect
Conducting wire 13 connects.
The single-pole double-throw switch (SPDT) 111 of current sub network network 11 includes by the of corresponding resistance 112 access adjustable resistance network 1
One state, and the second state that corresponding resistance 112 is shorted.Wherein in the first state, single-pole double-throw switch (SPDT) 111 is not
Moved end is connect with upper level sub-network 11 or the first connecting wire 12, and the of the resistance 112 of the first moved end and current sub network network 11
One end connection.In the second condition, the non-moving end of single-pole double-throw switch (SPDT) 111 and upper level sub-network 11 or the first connecting wire 12
Connection, wherein since adjustable resistance network 1 includes multilevel subnetwork network 11, non-moving end and upper level in single-pole double-throw switch (SPDT) 111
When sub-network 11 connects, the second moved end can pass through the single-pole double-throw switch (SPDT) 111 of third connecting wire 14 and next stage sub-network 11
Non-moving end or the second connecting wire 13 connection；When the non-moving end of single-pole double-throw switch (SPDT) 111 is connect with the first connecting wire 12,
Second moved end can be connect by third connecting wire 14 with the non-moving end of the single-pole double-throw switch (SPDT) 111 of next stage sub-network 11.
It, can be to list by controller 2 since the single-pole double-throw switch (SPDT) 111 of sub-networks 11 at different levels is connect with controller 2
Double-pole double throw switch 111 is controlled, and when controller 2 sends the first control instruction, single-pole double-throw switch (SPDT) 111 is in the first shape
State；When controller 2 sends the second control instruction, single-pole double-throw switch (SPDT) 111 is in the second state.The hilted broadsword of sub-networks 11 at different levels
Commutator 111 can switch to the first state of the first moved end work according to the first of controller 2 the instruction, according to controller 2
Second instruction switches to the second state of the second moved end work.
In embodiments of the present invention, as shown in Figure 1, the first connecting wire 12 of resistance adjustment system is connected to object to be measured
Positive terminal or negative pole end, the second connecting wire 13 of resistance adjustment system is connected to the ground terminal of object to be measured；Relay 3 is set
It is placed between the first connecting wire 12 and object to be measured, or is set between the second connecting wire 13 and object to be measured.
The first connecting wire 12 for being set to 1 one end of adjustable resistance network can be connected to the positive terminal of object to be measured, can also
Be connected to the negative pole end of object to be measured, be set to 1 other end of adjustable resistance network the second connecting wire 13 be connected to it is to be measured right
The ground terminal of elephant.
Settable relay 3 can by the closed state of relay 3 between the first connecting wire 12 and object to be measured
To realize the connection of resistance adjustment system Yu object to be measured, relay 3 can also be set to the second connecting wire 13 with it is to be measured right
As between, the same control that can be achieved to resistance adjustment system and object connection status to be measured.
In embodiments of the present invention, as depicted in figs. 1 and 2, the resistance value for the resistance 112 that every grade of sub-network 11 is included is not
It is identical, and the resistance value of the multistage sub-network 11 the being connected in series resistance 112 that is included changes according to predetermined gradient.
The resistance value of resistance 112 corresponding to the multilevel subnetwork network 11 that adjustable resistance network 1 is included is all different, and multiple
Resistance value changes according to predetermined gradient.
Wherein, the resistance value for the resistance 112 that the multistage sub-network 11 being connected in series is included is 2NOhm, N are to be greater than or wait
In 0 integer, and the value of N is sequentially increased or reduces along the direction of 12 to the second connecting wire 13 of the first connecting wire.
The resistance value of resistance 112 corresponding to sub-networks 11 at different levels is 2NOhm, wherein the value of N be more than or equal to
0 integer, and the value of N can be sequentially increased along the direction of 12 to the second connecting wire 13 of the first connecting wire, or along
The direction of one connecting wire, 12 to the second connecting wire 13 is sequentially reduced.
By setting 2 for the resistance value of resistance 112NOhm, it is available corresponding by the combination of different resistance 112
Resistance value, wherein the corresponding resistance 112 of current sub network network 11 can access, in controller when controller 2 sends the first control instruction
When 2 the second control instruction of transmission, the corresponding resistance 112 of current sub network network 11 can be shorted, wherein corresponding to adjustable resistance network 1
Resistance value R=20+21+22+…+2N, by selecting different resistance 112 to access, 1 resistance value of adjustable resistance network may be implemented
Consecutive variations.
It as shown in table 1, below can be along the direction of 12 to the second connecting wire 13 of the first connecting wire successively with the value of N
Increase, the first control instruction indicates that the second control instruction is illustrated for being indicated with 0 with 1.When control instruction is 1
It indicates that corresponding resistance 112 can access, indicates that corresponding resistance 112 can be shorted when control instruction is 0, the resistance of resistance 112
Value is sequentially increased along the direction of 12 to the second connecting wire 13 of the first connecting wire.
Table 1
When selecting corresponding resistance 112, selected according to the direction of 12 to the second connecting wire 13 of the first connecting wire.
If desired 7 ohm of resistance value, then R=20+21+22=7, corresponding control instruction is followed successively by 1,1,1,0,0 ..., and if desired 8 ohm
Resistance value, then R=23=8, corresponding control instruction is followed successively by 0,0,0,1,0 ....
By such design, the shape of single-pole double-throw switch (SPDT) 111 in the sub-networks at different levels 11 of adjustable resistance network 1 can be passed through
State, to obtain required different resistance values.
Resistance adjustment system provided in an embodiment of the present invention, the single-pole double-throw switch (SPDT) of sub-networks at different levels is adjusted by controller
State, and then adjust adjustable resistance network resistance value triggering is reached by the cooperation of resistance adjustment system and object to be tested
The state of insulation fault is reported, realizes the purpose of insulation fault simulation, and resistance adjustment system structure of the invention is simple, it is real to be easy to
Existing resistance value is adjusted, the development cycle is short, while may be implemented to have saved testing cost from the cooperation of different objects to be tested.
The embodiment of the present invention also provides a kind of insulation fault analogy method, applied to above-mentioned resistance adjustment system, such as Fig. 3
It is shown, this method comprises:
Step 301, in the state that relay is in and disconnects, pass through controller and obtain and carry required adjustable resistance net
The regulating command of the resistance value of network.
Whether the relay being set between resistance adjustment system and object to be measured firstly the need of detection is in an off state,
Under the premise of relay is in an off state, determines and is not in connection status between resistance adjustment system and object to be measured,
The disconnection of middle relay or closed state are controlled by controller, before the resistance value for adjusting adjustable resistance network, after
Electric appliance is in an off state always.It can be obtained by controller when relay is in an off state and to carry current desired ask
The regulating command of the resistance value of adjustable resistance network, wherein regulating command can be according to different object different froms to be tested.
Step 302, the resistance value that adjustable resistance network is adjusted according to regulating command.
After controller obtains regulating command, need to be adjusted according to resistance value of the regulating command to adjustable resistance network
Section.Due to for an object to be measured, corresponding first electricity of open-circuit condition between the positive terminal and ground terminal of object to be measured
Resistance corresponds to the first resistance value, and the corresponding second resistance of open-circuit condition between the negative pole end and ground terminal of object to be measured corresponds to the
Two resistance values, and the first resistance value, the second resistance value are definite value.By adjusting the resistance value of adjustable resistance network, so that after adjusting
The parallel value of the resistance value of adjustable resistance network and the first resistance value is equivalent to exhausted between the positive terminal and ground terminal of object to be measured
Edge resistance value, the resistance value of the adjustable resistance network after adjusting and the parallel value of the second resistance value are equivalent to the negative pole end of object to be measured
Insulating resistance value between ground terminal.
Wherein, adjustable resistance network includes the multistage sub-network being connected in series, and every grade of sub-network includes a single-pole double-throw switch (SPDT)
With a resistance, single-pole double-throw switch (SPDT) include control current sub network network resistance be serially connected with adjustable resistance network first state and
Control the second state that the resistance of current sub network network is shorted, the resistance value for the resistance that the sub-network that is connected in series of multistage is included not phase
It together, and is 2NOhm, N are the integer more than or equal to 0.
The step of adjusting the resistance value of adjustable resistance network according to regulating command, comprising: according to regulating command in multiple electricity
Determination can be serially connected with the target resistance of adjustable resistance network in resistance；It controls the corresponding single-pole double-throw switch (SPDT) of target resistance and is in first
State.
It when adjusting the resistance value of adjustable resistance network, needs to select target resistance in the resistance of multilevel subnetwork network, lead to
The state for crossing control single-pole double-throw switch (SPDT) accesses target resistance to realize, to obtain according to the series connection situation of multiple target resistances
Take required resistance value.
Wherein, the non-moving end of the single-pole double-throw switch (SPDT) of current sub network network is connected to upper level sub-network or the first connection is led
Line, the first moved end are connected to the first end of the resistance of current sub network network, and the second end of the second moved end and resistance is connected to next
The non-moving end of the single-pole double-throw switch (SPDT) of grade sub-network or the second connecting wire.First connecting wire and the second connecting wire are set respectively
It is placed in the both ends of adjustable resistance network.
The first moved end or the second moved end of single-pole double-throw switch (SPDT) are positively retained at working condition.Controller is receiving adjusting
After instruction, the first control instruction or the second control can be sent to the single-pole double-throw switch (SPDT) of sub-networks at different levels according to regulating command
System instruction, when single-pole double-throw switch (SPDT) receives the first control instruction, the first moved end is maintained at working condition, at this time single-pole double throw
Switch is in first state, and corresponding resistance is target resistance；When single-pole double-throw switch (SPDT) receives the second control instruction, second
Moved end is maintained at working condition, and corresponding resistance is not belonging to target resistance, is in short circuit state.
The resistance value of sub-networks at different levels is all different, and the resistance value of the multistage sub-network the being connected in series resistance that is included according to
Predetermined gradient variation, wherein the resistance value for the resistance that the multistage sub-network being connected in series is included is 2NOhm, N be more than or equal to
0 integer, and the value of N is sequentially increased or reduces along the direction of negative pole end for surveying the positive terminal of object to object to be measured.
By setting 2 for the resistance value of resistanceNOhm, can be according to the group of obstructed resistance according to the different value conditions of N
It closes to obtain required different resistance values, and then the continuous value of adjustable resistance network may be implemented.
Step 303, control relay switch to closed state.
After realizing the resistance value adjustment of adjustable resistance network, it can control relay and switch to closed state.Wherein control
The step of relay processed switches to closed state, comprising: send close command to relay, control relay is cut by off-state
Shift to closed state.
By sending close command to relay, it can control relay by current off-state and switch to closed form
State, and then the connection status of resistance adjustment system Yu object to be measured may be implemented.Since adjustable resistance network have passed through adjustment, then
The resistance value of adjustable resistance network after adjusting and the parallel value of the first resistance value can be made to be equivalent to the positive terminal of object to be measured
The parallel value of insulating resistance value between ground terminal, the resistance value and the second resistance value of the adjustable resistance network after adjusting is equivalent to
Insulating resistance value between the negative pole end and ground terminal of object to be measured.
Insulation fault analogy method provided in an embodiment of the present invention is connected using distributed resistance, it can be achieved that adjustable electric
The consecutive variations for hindering network resistance value, are controlled by the way of program-controlled, convenient and efficient, and output is accurate；It is simply real with period control method
With, it can be achieved that different object to be tested test, and function realizes and is easy that development cost is low, the period is short.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come
It says, can also make several improvements and retouch under the premise of not departing from principle of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (10)
1. a kind of resistance adjustment system, which is characterized in that the first end of the resistance adjustment system and the positive terminal of object to be measured
Or negative pole end connection, the second end of the resistance adjustment system is connect with the ground terminal of object to be measured, and object positive terminal to be measured
Open-circuit condition is formed between ground terminal or between negative pole end and ground terminal, the resistance adjustment system includes:
Adjustable resistance network, the adjustable resistance network include the multistage sub-network being connected in series, and every grade of sub-network includes a hilted broadsword
Commutator and a resistance, the non-moving end of the single-pole double-throw switch (SPDT) of current sub network network are connected to upper level sub-network or the first connection
Conducting wire, the first moved end are connected to the first end of the resistance, and the second end of the second moved end and the resistance is connected to next stage
The non-moving end of the single-pole double-throw switch (SPDT) of sub-network or the second connecting wire；And
The controller connecting with the single-pole double-throw switch (SPDT) of every grade of sub-network, the single-pole double-throw switch (SPDT) is according to the control of the controller
System instruction carry out state switching；
It is provided with the control resistance adjustment system between the resistance adjustment system and object to be measured and connect shape with object to be measured
The relay of state, and the relay is connect with the controller, carries out state switching according to the control of the controller；
Wherein, the open-circuit condition between the positive terminal and ground terminal of object to be measured corresponds to first resistor, the cathode of object to be measured
Open-circuit condition between end and ground terminal corresponds to second resistance, and the adjustable resistance network is in parallel with the first resistor, or
Adjustable resistance network described in person is in parallel with the second resistance.
2. resistance adjustment system according to claim 1, which is characterized in that
Second moved end of the single-pole double-throw switch (SPDT) of the current sub network network is connected to next stage by third connecting wire
The non-moving end of the single-pole double-throw switch (SPDT) of network or the second connecting wire；
The second end of the resistance of the current sub network network is connected directly to the single-pole double-throw switch (SPDT) of the next stage sub-network not
Moved end or the second connecting wire.
3. resistance adjustment system according to claim 1, which is characterized in that
The single-pole double-throw switch (SPDT) includes controlling the resistance of the current sub network network to be serially connected with the first of the adjustable resistance network
The second state that the resistance of state and the control current sub network network is shorted；
In said first condition, the first end of the resistance of the first moved end of the single-pole double-throw switch (SPDT) and the current sub network network
Connection, in said second condition, the single-pole double throw of the second moved end of the single-pole double-throw switch (SPDT) and the next stage sub-network
The non-moving end of switch or the connection of the second connecting wire.
4. resistance adjustment system according to claim 3, which is characterized in that
When the controller sends the first control instruction, the single-pole double-throw switch (SPDT) is in first state；
When the controller sends the second control instruction, the single-pole double-throw switch (SPDT) is in the second state.
5. resistance adjustment system according to claim 1, which is characterized in that
The resistance value for the resistance that every grade of sub-network is included is all different, and the resistance of the multistage sub-network the being connected in series resistance that is included
Value changes according to predetermined gradient.
6. resistance adjustment system according to claim 5, which is characterized in that
The resistance value for the resistance that the sub-network that multistage is connected in series is included is 2NOhm, wherein N is the integer more than or equal to 0, and
The value of N is sequentially increased or reduces along the direction of first connecting wire to second connecting wire.
7. resistance adjustment system according to claim 1, which is characterized in that
First connecting wire of the resistance adjustment system is connected to the positive terminal or negative pole end of object to be measured, the resistance adjustment
Second connecting wire of system is connected to the ground terminal of object to be measured；
The relay is set between first connecting wire and object to be measured, or is set to second connecting wire
Between object to be measured.
8. a kind of insulation fault analogy method is applied to resistance adjustment system as described in claim 1, which is characterized in that institute
The method of stating includes:
In the state that the relay is in and disconnects, is obtained by the controller and carry the required adjustable resistance net
The regulating command of the resistance value of network；
The resistance value of the adjustable resistance network is adjusted according to the regulating command；
It controls the relay and switches to closed state；
Wherein, the corresponding first resistor of open-circuit condition between the positive terminal of object to be measured and ground terminal corresponds to the first resistance value,
The corresponding second resistance of open-circuit condition between the negative pole end of object to be measured and ground terminal corresponds to the second resistance value, the institute after adjusting
The parallel value of the resistance value and first resistance value of stating adjustable resistance network be equivalent to object to be measured positive terminal and ground terminal it
Between insulating resistance value, the resistance value of the adjustable resistance network after adjusting and the parallel value of second resistance value be equivalent to
Survey the insulating resistance value between the negative pole end and ground terminal of object.
9. according to the method described in claim 8, it is characterized in that, the single-pole double-throw switch (SPDT) includes controlling the current sub network
The resistance of network is serially connected with the first state of the adjustable resistance network and the resistance of the control current sub network network is shorted the
The resistance value of two-state, the resistance that the sub-network that multistage is connected in series is included is all different, and is 2NOhm, N are to be greater than or wait
In 0 integer；
The step of resistance value that the adjustable resistance network is adjusted according to the regulating command, comprising:
According to the regulating command, determination can be serially connected with the target resistance of the adjustable resistance network in multiple resistance；
It controls the corresponding single-pole double-throw switch (SPDT) of the target resistance and is in first state.
10. according to the method described in claim 8, it is characterized in that, the control relay switches to closed state
Step, comprising:
Close command is sent to the relay, the relay is controlled by off-state and switches to closed state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811030563.XA CN109298292A (en) | 2018-09-05 | 2018-09-05 | A kind of resistance adjustment system and insulation fault analogy method |
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| CN201811030563.XA CN109298292A (en) | 2018-09-05 | 2018-09-05 | A kind of resistance adjustment system and insulation fault analogy method |
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| CN109298292A true CN109298292A (en) | 2019-02-01 |
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