CN104656629B - Sintering detection apparatus and method for contactor - Google Patents
Sintering detection apparatus and method for contactor Download PDFInfo
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- CN104656629B CN104656629B CN201310578707.6A CN201310578707A CN104656629B CN 104656629 B CN104656629 B CN 104656629B CN 201310578707 A CN201310578707 A CN 201310578707A CN 104656629 B CN104656629 B CN 104656629B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- Automation & Control Theory (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention proposes a kind of sintering detection apparatus and method for contactor, and described device includes：The first test side and the second test side being arranged at two contacts of motor contactor；Transformer, two ports of transformer secondary are connected with the first test side and the second test side respectively, for gathering the on off operating mode of the first test side and the second test side；Control module and operational amplifying module, control module is used to generate test signal and send test signal to the primary side of transformer, operational amplifying module is used to gather the signal at primary side both ends and is amplified to generate back production signal, control module judges that control contactor disconnects when the difference of back production signal and test signal is more than predetermined threshold value, if the difference of back production signal and test signal is still more than predetermined threshold value afterwards, judge that contactor has sintered.Device according to embodiments of the present invention, can detect whether contactor sinters, and when contactor sinters, take measures to protect drive module, improve the security of electric automobile.
Description
Technical field
The present invention relates to electric automobile field, more particularly to a kind of sintering detection apparatus and method for contactor.
Background technology
Current loop is needed during motor driving, and single-phase contactor is connected can not form loop, therefore in electricity
In the motor triple line of electrical automobile, the V phases and W phases of controlled motor, the then driving with controller of U phases are distinguished using two contactors
Module I GBT（Insulated Gate Bipolar Transistor, insulated gate bipolar transistor）It is joined directly together, without connecing
Tentaculum turns off processing.
For most electric automobile, its driving power is smaller, increases the quantity of battery bag and can increase voltage
Greatly, then required driving current will be smaller.It is thereby possible to select A.C. contactor species it is more.But exist at present
The high-power V TOG of electric automobile（Two-way inversion charge and discharge power technology）In design, driving power is larger, and the quantity of battery bag is not
May infinitely it increase, i.e., battery bag voltage will not infinitely increase, therefore driving current just inevitably increases.
At present, it is primarily present problems with：（1）The A.C. contactor species of high current is less, the exchange of most high currents
Contactor is all customized using non-standard, or is substituted using D.C. contactor, therefore, considerably increases contactor failure
Risk；（2）Contactor is mechanical devices, and service life is shorter, therefore is easily damaged in use；（3）Contactor is in high pressure
In distribution box, it is impossible to the state of contactor is detected, when contactor sinters, it is impossible to take measures in time to electricity
Electrical automobile is protected, and easily causes the badly damaged of electric automobile.
The content of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technological deficiency.
Therefore, first purpose of the present invention is to propose a kind of sintering detection apparatus for contactor, the device can
To detect whether contactor sinters, when detecting contactor sintering, take measures to protect the drive module of motor, improve electricity
The security of electrical automobile.
Second object of the present invention is to propose a kind of sintering detection method for contactor.
To reach above-mentioned purpose, the sintering detection apparatus for contactor of first aspect present invention embodiment, including：If
Put the first test side and the second test side at two contacts of motor contactor；Transformer, the two of the transformer secondary
Individual port is connected with first test side and second test side respectively, for gathering first test side and described
The on off operating mode of two test sides；Control module and operational amplifying module, the control module are used to generate test signal and by institute
State test signal to send to the primary side of the transformer, the operational amplifying module is for gathering the signal at the primary side both ends simultaneously
It is amplified to generate back production signal, the control module judges that the back production signal and the difference of the test signal are more than in advance
If controlling the contactor to disconnect during threshold value, if the difference of the back production signal and the test signal is still more than default afterwards
Threshold value, then judge that the contactor has sintered.
The sintering detection apparatus for contactor of the embodiment of the present invention, at least has the advantages that：（1）Each
Before electric automobile starts, the state of contactor is detected, it is ensured that contactor is the state disconnected before non-adhesive contactor,
Electric automobile is avoided to be malfunctioned when starting；（2）By being detected to motor contactor and judging whether contactor occurs
Sintering, if contactor sinters, take immediate steps and drive module protected, improve the service life of drive module,
Improve the security of electric automobile.
To reach above-mentioned purpose, the sintering detection method for contactor of second aspect of the present invention embodiment, including with
Lower step：Two ports of transformer secondary are connected with the first test side and the second test side respectively, wherein, described first
Test side and second test side are separately positioned at two contacts of contactor；Generate test signal and believe the test
Number send to transformer primary side；Gather the signal at the primary side both ends and be amplified to generate back production signal；Described in acquisition
Back production signal, and judge whether the back production signal and the difference of the test signal are more than predetermined threshold value；When judgement is more than institute
When stating predetermined threshold value, the contactor is controlled to disconnect, and continue to obtain the back production signal；If the back production signal with it is described
The difference of test signal then judges that the contactor has sintered still greater than the predetermined threshold value.
The sintering detection method for contactor of the embodiment of the present invention, at least has the advantages that：（1）Each
Before electric automobile starts, the state of contactor is detected, it is ensured that contactor is the state disconnected before non-adhesive contactor,
Electric automobile is avoided to be malfunctioned when starting；（2）By being detected to motor contactor and judging whether contactor occurs
Sintering, if contactor sinters, take immediate steps and drive module protected, improve the service life of drive module,
Improve the security of electric automobile.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the structural representation of the sintering detection apparatus according to an embodiment of the invention for contactor；
Fig. 2 is the structural representation of the sintering detection apparatus according to an embodiment of the invention for contactor；
Fig. 3 is the electrical block diagram of the sintering detection apparatus according to an embodiment of the invention for contactor；
Fig. 4 is the flow chart of the sintering detection method according to an embodiment of the invention for contactor.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.For letter
Change disclosure of the invention, hereinafter the part and setting of specific examples are described.Certainly, they are only example, and
Purpose does not lie in the limitation present invention.In addition, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy
It is the relation between itself not indicating discussed various embodiments and/or setting for purposes of simplicity and clarity again.This
Outside, the invention provides various specific techniques and material examples, but those of ordinary skill in the art can be appreciated that
The applicable property of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it
" on " structure can include the first and second features and be formed as the embodiment that directly contacts, other feature shape can also be included
Into the embodiment between the first and second features, such first and second feature may not be direct contact.
In the description of the invention, it is necessary to explanation, unless otherwise prescribed and limit, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanical connection or electrical connection or the connection of two element internals, can
To be to be joined directly together, can also be indirectly connected by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
With reference to following description and accompanying drawing, it will be clear that these and other aspects of embodiments of the invention.In these descriptions
In accompanying drawing, some particular implementations in embodiments of the invention are specifically disclosed, to represent to implement the implementation of the present invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.On the contrary, the present invention
Embodiment includes all changes, modification and the equivalent fallen into the range of the spirit and intension of attached claims.
In the motor triple line of electric automobile, using the triple line of two motor contactor controlled motors, work as contactor
After sintering, the drive module damage being connected with motor is may result in, in order to protect drive module and ensure electronic vapour
The safety of car, the present invention propose a kind of contactor sintering detection apparatus for motor, root are described below with reference to Figure of description
According to the contactor sintering detection apparatus for motor of the embodiment of the present invention.
In the motor triple line of electric automobile, using the triple line of two motor contactor controlled motors, wherein contacting
Device is mechanical devices, and the disconnection of contactor is usually what is occurred when having high current to flow through, is easiest in this case
There is the phenomenon of arc discharge of contactor terminal, contact can produce high temperature and melt gradually, then easily be sticked together, i.e., so-called
Contactor sinters.After contactor sinters, the drive module damage being connected with motor is may result in, in order to protect driving mould
Block and the security for improving electric automobile, the present invention propose a kind of contactor sintering detection apparatus and method for motor,
Below with reference to Figure of description description propose according to embodiments of the present invention for the contactor sintering detection apparatus of motor and side
Method.
Fig. 1 is the structural representation of the sintering detection apparatus for contactor of the embodiment of the present invention.
As shown in figure 1, the sintering detection apparatus for contactor of the embodiment of the present invention includes：First test side 100,
Two test sides 200, transformer 300, control module 400 and operational amplifying module 500.
Wherein, the first test side 100 and the second test side 200 are separately positioned at two contacts of contactor.In this hair
In bright one embodiment, contactor is the electric machine controller in electric automobile.
Two ports of the secondary of transformer 300 are connected with the first test side 100 and the second test side 200 respectively, for adopting
Collect the on off operating mode of the first test side 100 and the second test side 200.
Specifically, transformer 300 isolates the high pressure on contacts of contactor and high current.Transformer 300 is used to gather the
On off operating mode between one test side 100 and the second test side 200, for example, when two contact adhesives of contactor, the first inspection
It is the secondary short circuit of on-state, then transformer 300 between the survey test side 200 of end 100 and second, when two contacts of contactor
It is off-state between the first test side 100 and the second test side 200, the secondary of transformer 300 is without loop during non-adhesive.
In one embodiment of the invention, transformer 300 to power and is pounded than no requirement (NR), can be 1：1 can also be
Other ratios.The resistance R3 and electric capacity C1 of the secondary of transformer 300 be can high voltage bearing device, and built by resistance R3 and electric capacity C1
High-pass filter parameter then need to carry out corresponding parameter matching according to the difference of contactor, the matching of parameter can pass through experiment
Complete.
Control module 400 is used to generate test signal and send test signal to the primary side of transformer 300, operation amplifier
Module 500 is used to gather the signal at primary side both ends and is amplified to generate back production signal, and control module 400 judges back production signal
When being more than predetermined threshold value with the difference of test signal control contactor disconnect, if afterwards the difference of back production signal and test signal according to
So it is more than predetermined threshold value, then judges that contactor has sintered.
In one embodiment of the invention, operational amplifying module 500 can be operational amplifier.
Specifically, for example, control module 400 generates test signal and sends test signal to the primary side of transformer 300,
Operational amplifying module 500 gathers the signal at primary side both ends and is amplified to generate back production signal, and the secondary of transformer 300 with
First test side 100 is connected with the second test side 200, i.e., is connected with the contact of contactor, is connected when the secondary of transformer 300
During contactor adhesive, the characteristics of from transformer 300, the secondary short circuit of transformer 300, back production signal can be caused to occur abnormal
Become；When the non-adhesive of the contactor that the secondary of transformer 300 is connected, the secondary open circuit of transformer 300, to the primary side of transformer 300
Signal do not influence.Can so set a predetermined threshold value and by judge back production signal and test signal difference whether
Judge whether contactor is in attracting state more than the predetermined threshold value, when the difference for judging back production signal and test signal is more than
During predetermined threshold value（I.e. contactor adhesive when）, control contactor disconnects, if the difference of back production signal and test signal is still afterwards
More than predetermined threshold value, then illustrating the contact adhesion of contactor can not disconnect together, that is, judge that contactor has sintered.
In one embodiment of the invention, when judging that contactor has occurred and that sintering can not disconnect, in order that with electricity
The connected drive module of machine is without prejudice, and control module 400 then closes PWM immediately（Pulse Width Modulation, pulse
Width modulated）Ripple is to protect drive module.
In one embodiment of the invention, control module 400 can pass through DSP（Digital Signal
Processing, digital signal processor）Realize, can also be realized by other devices, herein not to the reality of control module 400
Existing mode is limited.
In one embodiment of the invention, after control contactor disconnects, if the difference of back production signal and test signal
Predetermined threshold value is become smaller than, then illustrating the contact of contactor can disconnect according to control is normal, that is, judge that contactor does not burn
Knot.
Fig. 2 is the structural representation of the sintering detection apparatus for contactor of the embodiment of the present invention, as shown in Fig. 2 control
Molding block 400 specifically includes：Test signal transmitting element 410 and control unit 420.Fig. 3 is according to one embodiment of the invention
The sintering detection apparatus for contactor electrical block diagram.Sent with reference to Fig. 2 and Fig. 3 to describe test signal
Unit 410 and control unit 420.
Test signal transmitting element 410 is used to generate test signal and send test signal to the primary side of transformer 300.
Specifically, as shown in figure 3, the primary side of transformer 300 is low-pressure section, the generation of test signal transmitting element 410 is surveyed
Trial signal simultaneously sends test signal to the primary side of transformer 300.For example, test signal can be the sine of a fixed frequency
Ripple.The concrete form of test signal is not limited herein.
Control contactor breaks when control unit 420 is for judging that the difference of back production signal and test signal is more than predetermined threshold value
Open, if the difference of back production signal and test signal is still more than predetermined threshold value afterwards, judge that contactor has sintered, if returning afterwards
The difference of the number of accepting and believing and test signal becomes smaller than predetermined threshold value, then judges that contactor does not sinter.
Specifically, as shown in figure 3, after the contactor adhesive that the secondary of transformer 300 is connected, for high-frequency signal
Speech, R3, C1 of the secondary of transformer 300 are equivalent to there is short circuit phenomenon, and the characteristics of from transformer 300, test signal exists
The energy of the primary side of transformer 300 storage discharges after secondary short circuit to secondary transmission, now the signal at the primary side both ends of transformer 300
It can be distorted, then very big difference be present between the test signal that back production signal and test signal transmitting element 410 are sent, control
Unit 420 processed judges that contactor is in attracting state accordingly.
More specifically, control unit 420 judges that control connects when the difference of back production signal and test signal is more than predetermined threshold value
Tentaculum disconnects, if the difference of back production signal and test signal is still more than predetermined threshold value afterwards, judges that contactor has sintered, if
The difference of back production signal and test signal becomes smaller than predetermined threshold value afterwards, then judges that contactor does not sinter.
The sintering detection apparatus for contactor of the embodiment of the present invention, at least has the advantages that：（1）Each
Before electric automobile starts, the state of contactor is detected, it is ensured that contactor is the state disconnected before non-adhesive contactor,
Electric automobile is avoided to be malfunctioned when starting；（2）By being detected to motor contactor and judging whether contactor occurs
Sintering, if contactor sinters, take immediate steps and drive module protected, improve the service life of drive module,
Improve the security of electric automobile.
In one embodiment of the invention, the sintering for contactor using the embodiment of the present invention is exemplified below
Detection means is sintered the process of detection to contactor：When electric automobile needs disconnection contactor or other need detection
Wait, send open command and disconnected to contactor with control contactor, test signal is then sent by control module 400（Such as one
The sine wave of individual specific frequency）To the primary side of transformer 300, test signal is coupled to secondary through transformer 300, while computing is put
Big module 500 gathers the signal at primary side both ends and is amplified to generate back production signal；If the secondary connection of transformer 300 connects
Tentaculum is still in attracting state, from transformer characteristic, after secondary short circuit, the signal at primary side both ends can be caused to be distorted；
Back production signal compared with test signal, if both differences are more than predetermined threshold value, is illustrated contactor by control module 400
Contact adhesion can not disconnect together, that is, judge that contactor has sintered；If the difference of back production signal and test signal is small
In predetermined threshold value（That is the difference of back production signal and test signal is smaller）, illustrate that contactor can be according to the positive normal off of open command
Open, then judge that contactor does not sinter.
In addition, the sintering detection apparatus for contactor of the embodiment of the present invention at present only apply without back production function by limit
Contactor, the contactor at present with back production function is less, and the contactor of high current when doing back production its insulation processing into
The requirements such as sheet, technique are higher.
In order to realize above-described embodiment, the present invention also proposes a kind of sintering detection method for contactor.
Fig. 4 is the flow chart of the sintering detection method according to an embodiment of the invention for contactor.
As shown in figure 4, the sintering detection method for contactor comprises the following steps：
Step S101, two ports of transformer secondary are connected with the first test side and the second test side respectively, its
In, the first test side and the second test side are separately positioned at two contacts of contactor.
In one embodiment of the invention, contactor is the electric machine controller in electric automobile.
Specifically, transformer isolates the high pressure on contacts of contactor and high current.Transformer is used to gather the first detection
On off operating mode between end and the second test side, for example, when two contact adhesives of contactor, the first test side and the second inspection
Survey end between be on-state, then transformer secondary short circuit, when the non-adhesive in two contacts of contactor, the first test side with
It is off-state between second test side, the secondary of transformer is without loop.
Step S102, generate test signal and send test signal to the primary side of transformer.
For example, the sine wave of a fixed frequency can be generated and sent to the primary side of transformer.
Step S103, the signal at collection primary side both ends are simultaneously amplified to generate back production signal.
Specifically, because decay occurs after the primary coil of transformer and the resistance of primary side in test signal, therefore
Gathered again after needing to amplify signal when gathering signal, such as signal and the progress at primary side both ends are gathered by operational amplifier
Amplification, to generate back production signal.
Step S104, back production signal is obtained, and judge whether the difference of back production signal and test signal is more than predetermined threshold value.
Specifically, for example, when contactor adhesive, the secondary short circuit of transformer, transformer primary side back production can be caused to obtain
Signal be distorted；When the non-adhesive of contactor, the secondary open circuit of transformer, the signal of transformer primary side is not influenceed.
A predetermined threshold value can so be set and by judging whether the difference of back production signal and test signal is more than the predetermined threshold value
To judge whether contactor is in attracting state.
Step S105, when judging to be more than predetermined threshold value, control contactor disconnects, and continues to obtain back production signal.
Specifically, when the difference for judging back production signal and test signal is more than predetermined threshold value（I.e. contactor adhesive when）,
Control contactor disconnects, and continues to obtain back production signal, judges whether contactor can be according to the positive normal off of control for follow-up
Open.
Step S106, if the difference of back production signal and test signal judges that contactor has sintered still greater than predetermined threshold value.
Specifically, if the difference of back production signal and test signal is still more than predetermined threshold value afterwards, touching for contactor is illustrated
Point is sticked together and can not disconnected, then judges that contactor has sintered.
In one embodiment of the invention, after step S105, can also include：Step S107, if back production signal
Predetermined threshold value is become smaller than with the difference of test signal, then judges that contactor does not sinter.
Specifically, if the difference of back production signal and test signal becomes smaller than predetermined threshold value, the contact of contactor is illustrated
It can be disconnected according to control is normal, that is, judge that contactor does not sinter.
In one embodiment of the invention, step S106 and step S107 on execution sequence in no particular order.
The sintering detection method for contactor of the embodiment of the present invention, at least has the advantages that：（1）Each
Before electric automobile starts, the state of contactor is detected, it is ensured that contactor is the state disconnected before non-adhesive contactor,
Electric automobile is avoided to be malfunctioned when starting；（2）By being detected to motor contactor and judging whether contactor occurs
Sintering, if contactor sinters, take immediate steps and drive module protected, improve the service life of drive module,
Improve the security of electric automobile.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (7)
- A kind of 1. sintering detection apparatus for contactor, it is characterised in that including：The first test side and the second test side being arranged at two contacts of contactor；Transformer, two ports of the transformer secondary are connected with first test side and second test side respectively, For gathering the on off operating mode of first test side and second test side；Control module and operational amplifying module, the control module be used for generate test signal and by the test signal send to The primary side of the transformer, the operational amplifying module are used to gather the signal at the primary side both ends and are amplified to generate back The number of accepting and believing, the control module are judged when the difference of the back production signal and the test signal is more than predetermined threshold value described in control Contactor disconnects, if the difference of the back production signal and the test signal is still more than predetermined threshold value afterwards, described in judgement Contactor has sintered.
- 2. the sintering detection apparatus according to claim 1 for contactor, it is characterised in that control the contactor to break After opening, if the back production signal and the difference of the test signal become smaller than the predetermined threshold value, the contact is judged Device does not sinter.
- 3. the sintering detection apparatus according to claim 2 for contactor, it is characterised in that the control module bag Include：Test signal transmitting element, for generating test signal and sending the test signal to the primary side of the transformer；Control unit, connect described in control during for judging that the back production signal and the difference of the test signal are more than predetermined threshold value Tentaculum disconnects, if the back production signal and the difference of the test signal are still more than the predetermined threshold value afterwards, judges institute Contactor is stated to have sintered, if the back production signal and the difference of the test signal become smaller than the predetermined threshold value afterwards, Judge that the contactor does not sinter.
- 4. according to the sintering detection apparatus for contactor described in claim any one of 1-3, it is characterised in that the contact Device is the electric machine controller in electric automobile.
- 5. a kind of sintering detection method for contactor, it is characterised in that comprise the following steps：S1, two ports of transformer secondary are connected with the first test side and the second test side respectively, wherein, described first Test side and second test side are separately positioned at two contacts of contactor；S2, generation test signal simultaneously send the test signal to the primary side of the transformer；S3, the signal for gathering the primary side both ends are simultaneously amplified to generate back production signal；S4, the back production signal is obtained, and judge whether the back production signal and the difference of the test signal are more than default threshold Value；S5, when judging to be more than the predetermined threshold value, control contactor disconnection, and continue to obtain the back production signal；If the difference of S6, the back production signal and the test signal still greater than the predetermined threshold value, judges the contactor Sinter.
- 6. the sintering detection method according to claim 5 for contactor, it is characterised in that after the step S5, Also include：If the back production signal and the difference of the test signal become smaller than the predetermined threshold value, the contactor is judged not Sinter.
- 7. the sintering detection method according to claim 6 for contactor, it is characterised in that the contactor is electronic Electric machine controller in automobile.
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| CN107284242B (en) * | 2016-03-31 | 2020-03-31 | 比亚迪股份有限公司 | High-voltage electricity-withdrawing method and device for electric vehicle |
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| CN102540064A (en) * | 2010-12-29 | 2012-07-04 | 比亚迪股份有限公司 | Sintering detection method for contactor in high-voltage discharge control circuit |
| CN102890237A (en) * | 2012-09-27 | 2013-01-23 | 潍柴动力股份有限公司 | Method and device for detecting faults of main touch point of high-voltage direct-current contact |
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