CN106443429A - Apparatus and method of detecting electric shock state of contact of motor controller - Google Patents
Apparatus and method of detecting electric shock state of contact of motor controller Download PDFInfo
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- CN106443429A CN106443429A CN201610792137.4A CN201610792137A CN106443429A CN 106443429 A CN106443429 A CN 106443429A CN 201610792137 A CN201610792137 A CN 201610792137A CN 106443429 A CN106443429 A CN 106443429A
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- contact
- current
- motor controller
- controller
- electric shock
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- General Physics & Mathematics (AREA)
- Control Of Electric Motors In General (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention disclose an apparatus and method of detecting electric shock state of contact of a motor controller. The apparatus of detecting electric shock state of contact of a motor controller includes a protection circuit, a difference amplifier and a detection circuit, wherein the protection circuit is provided with two input ends which are respectively connected to the contact of a motor controller; the difference amplifier is provided with two input ends which are respectively connected to two output ends of the protection circuit; the detection circuit is connected to the contact of the motor controller to detect the result of changing of the parameters of the contact, and can determine the electric shock state of the contact according to the result of changing of the parameters; and the electric shock state of the contact includes closing of the contact and contact faults. The apparatus and method of detecting electric shock state of contact of a motor controller can solve the technical problem that the voltage span is large and is hard to sample when the contact of a motor controller (starter, contactor) is closed and opened.
Description
Technical field
The present invention relates to high speed motor car field, in particular to a kind of contact electric shock state of detection motor controller
Device and method.
Background technology
High speed motor car have the advantages that speed height, fuel saving, safe and reliable, have high quality service, compared with ordinary train, display
Go out huge superiority.However, High Speed Train in China is technically ripe not enough, in the process of moving, the motor of train opens
Often the faults such as contact failure in dynamic device, catalyst, cause the element of high speed motor car to loosen virtual connection problem, have had a strong impact on train
Safe operation.
Accordingly, it would be desirable to the electric elements state of high speed motor car is carried out by on-line checking and carries out fault diagnosis.However, due to
When high speed motor car motor starter and contacts of contactor normally closed voltage be millivolt level, and when disconnection after voltage be possible to for
380V, therefore measurement voltage span is big, and existing measurement apparatus cannot realize the detection to this kind of large span voltage.
For above-mentioned problem, effective solution is not yet proposed at present.
Content of the invention
Embodiments provide a kind of device and method of the contact electric shock state of detection motor controller, with least
The technology that when solving the closing of contact of motor controller (trigger, catalyst) and disconnecting, voltage span is difficult to sample greatly is asked
Topic.
A kind of one side according to embodiments of the present invention, there is provided the dress of the contact electric shock state of detection motor controller
Put, including：
Protection circuit, has two inputs of the contact being respectively connecting to motor controller；
Difference amplifier, has two inputs of two outfans being respectively connecting to protection circuit；And
Testing circuit, connects the result of variations of the parameter detecting contact to the contact of motor controller, and according to parameter
Result of variations, determines the electric shock state of contact, and wherein, the electric shock state of contact at least includes the closing of contact and contact fault.
Another aspect according to embodiments of the present invention, additionally provides a kind of contact electric shock state of detection motor controller
Method, including：
Two inputs of protection circuit are respectively connecting to the contact of motor controller；
Two inputs of difference amplifier are respectively connecting to two outfans of protection circuit；And
Testing circuit is connected to the contact of motor controller, to detect the result of variations of the parameter of contact, and according to ginseng
The result of variations of number, determines the electric shock state of contact, and wherein, the electric shock state of contact at least includes the closing of contact and contact event
Barrier.
In embodiments of the present invention, using the side of reference protection circuit and difference amplifier in measurement apparatus and method
Formula, detects the voltage and current at the contact of motor controller or the temperature at contact by testing circuit, has reached online inspection
Survey the purpose of the electric shock state of contact, it is achieved thereby that structure is simple, easy to carry, the high technique effect of certainty of measurement, and then
The technology that when solving the closing of contact of motor controller (trigger, catalyst) and disconnecting, voltage span is difficult to sample greatly is asked
Topic.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the device of contact electric shock state of detection motor controller according to embodiments of the present invention；With
And
Fig. 2 is the schematic diagram of the method for contact electric shock state of detection motor controller according to embodiments of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention it is clear that described embodiment is only
The embodiment of a present invention part, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of not making creative work, all should belong to the model of present invention protection
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that such use
Data can exchange in the appropriate case so that embodiments of the invention described herein can with except here diagram or
Order beyond those of description is implemented.Additionally, term " comprising " and " having " and their any deformation are it is intended that cover
Cover non-exclusive comprising, for example, contain series of steps or process, method, system, product or the equipment of unit are not necessarily limited to
Those steps clearly listed or unit, but may include clearly not listing or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
According to embodiments of the present invention, there is provided a kind of device embodiment of electric shock state of detection motor controller and one kind
The embodiment of the method for contact electric shock state of detection motor controller, it should be noted that the flow process in accompanying drawing illustrates
Step can execute in the computer system of such as one group of computer executable instructions, and although illustrates in flow charts
Logical order, but in some cases, can be with the step shown or described different from order execution herein.
The present invention is applied to high speed motor car motor controller (specifically, trigger and catalyst) contact voltage, electricity
Stream, the isoparametric variation tendency of temperature are monitored；Can measure and gather high speed motor car motor controller in real time (specifically, to open
Dynamic device and catalyst) contact normally closed and voltage drop when disconnecting, electric current and temperature data, and by the analysis of data,
Judge the contact state of motor controller (specifically, trigger and catalyst).In addition, data can preserve for a long time to survey
Trial assembly is put interior and is wirelessly sent the data to server.
Fig. 1 is the schematic diagram of the device of contact electric shock state of detection motor controller according to embodiments of the present invention, tool
Body ground, shows detection motor starter, the schematic diagram of the device of contact electric shock state of catalyst.
As shown in figure 1, the device of the contact electric shock state of this detection motor controller includes：
Protection circuit, has two inputs of the contact being respectively connecting to motor controller；
Difference amplifier, has two inputs of two outfans being respectively connecting to protection circuit；And
Testing circuit (not shown in figure 1), connects the change knot of the parameter detecting contact to the contact of motor controller
Really, the result of variations and according to parameter, determines the electric shock state of contact, wherein, the electric shock state of contact at least includes contact and closes
Close and contact fault.
Specifically, as shown in figure 1, protection circuit includes the first current-limiting resistance R1, the second current-limiting resistance R2 and is connected to
Protection device D1ESD9B between one current-limiting resistance R1 and the second current-limiting resistance R2, wherein, one end of the first current-limiting resistance R1 is even
It is connected to one of contact, the other end of the first current-limiting resistance R1 connects to first one end of overprotection device D1ESD9B, second
One end of current-limiting resistance R2 connect to contact corresponding another, the other end of the first current-limiting resistance R2 connects to protector
Second end of part D1ESD9B, the first end of protection device D1ESD9B and the second end connect to difference as two outfans 2,3
Two inputs of amplifier.
D1ESD9B can be Transient Suppression Diode (TVS).
Difference amplifier can be AD620.
Analogue signal after amplifying through difference amplifier is entered by the A/D chip that rear end sent into by the outfan 6 of difference amplifier
Row data conversion, another outfan 5 of difference amplifier is grounded.
As shown in fig. 1, difference amplifier is included in the place of the device of contact electric shock state of this detection motor controller
In reason portion, this processing unit further includes input 1 and outfan 8, and the resistance R3 of 2K Ω is connected to input 1 and outfan 8
Between.The voltage of+15V and -15V is respectively applied on the terminal 4 and terminal 7 of processing unit.
When the contacts are closed, contact voltage is reduced to millivolt level, and now TVS is in non-leading due to being not reaching to breakdown voltage
Logical state, voltage is applied directly to the input of difference amplifier, and the analogue signal after amplifying through difference amplifier sends into rear end
Carry out data conversion in A/D chip；And when contact disconnects, contact two ends are changed into high pressure, now TVS conducting, and by R1,
R2 current limliting, serves the protection to difference amplifier.
In the present invention, realize the fault detect to motor controller (trigger and catalyst) contact by two schemes：
1. the voltage drop on real-time detection motor controller (trigger or catalyst) contact and electric current, to be obtained with this
The internal resistance of contact, if internal resistance is not in set point, illustrates to break down in contact.
Specifically, as shown in figure 1, V+, V- are connected on contact two ends respectively, that is, as the input of contact voltage pressure drop.As
One example, testing circuit (not shown in figure 1) may include voltmeter and ammeter, and wherein, voltmeter is connected in parallel to contact,
To detect the voltage at contact two ends, ammeter is connected to contact, to detect the electric current flowing through contact, according to the electricity being detected
Pressure and the internal resistance of electric current acquisition contact, if internal resistance is not in set point, judge to break down in contact.
Wherein, the design parameter according to motor starter to be detected, the set point of internal resistance can pass through device touch screen
Interface is flexibly arranged, and the setting principle of internal resistance is：Escape and be likely to occur under detected motor starter normal operation
The internal resistance of minimum and maximum contact.Software design patterns are passed through according to motor controller parameter.
2. real-time detection motor controller (trigger or catalyst) contact temperature, when temperature exceedes set threshold value, says
Break down in bright contact.
Specifically, as shown in figure 1, testing circuit (not shown in figure 1) may include temperature sensor, wherein, temperature sensing
Device detects the temperature of contact, if temperature exceedes temperature threshold, judges to break down in contact.
Wherein, the design parameter according to motor starter to be detected, temperature threshold is to pass through device touch screen interface
Flexibly arranged, the setting principle of temperature threshold is：Escape and be likely to occur under detected motor starter normal operation
Minimum and maximum contact temperature.Software design patterns are passed through according to motor controller parameter.
Alternatively, the device of the contact electric shock state of detection motor controller may also include transport part (not shown in figure 1),
Connect to testing circuit, the data being detected by testing circuit is transmitted in a wired or wireless manner to server.
According to the embodiment of the present invention, by the protection of TVS and current-limiting resistance, solve and suppress high after contact is cut-off
A difficult problem for voltage.And add difference amplifier for the little feature of contact voltage pressure drop and improve certainty of measurement.
In addition, the present invention adopts portable construction, it is simple to have a structure, the features such as easy to carry, and integrated is wirelessly transferred
Module, improves transfer efficiency in data.
Fig. 2 shows the signal of the method for the contact electric shock state of the detection motor controller according to embodiment of the present invention
Figure, specifically, shows detection motor starter, the schematic diagram of the method for contact electric shock state of catalyst.
As shown in Fig. 2 the method for the contact electric shock state of this detection motor controller includes：
S202：Two inputs of protection circuit are respectively connecting to the contact of motor controller；
S204：Two inputs of difference amplifier are respectively connecting to two outfans of protection circuit；And
S206：Testing circuit is connected to the contact of motor controller, to detect the result of variations of the parameter of contact, and root
According to the result of variations of parameter, determine the electric shock state of contact, wherein, the electric shock state of contact at least includes the closing of contact and contact
Fault.
Specifically, in conjunction with Fig. 1, protection circuit includes the first current-limiting resistance R1, the second current-limiting resistance R2 and is connected to first
Protection device D1ESD9B between current-limiting resistance R1 and the second current-limiting resistance R2, wherein, two inputs of protection circuit is divided
Do not connect and include to the contact of motor controller：
One of one end of first current-limiting resistance R1 is connected to contact, by one end of the second current-limiting resistance R2 connect to
In contact corresponding another, wherein, protection device D1ESD9B is connected to the other end of the first current-limiting resistance R1 and the second limit
Between the other end of leakage resistance R2.The first end of protection device D1ESD9B and the second end connect to poor as two outfans 2,3
Divide two inputs of amplifier.
Protection device can be Transient Suppression Diode, and difference amplifier can be AD620.
In the present invention, realize the fault detect to motor controller (trigger and catalyst) contact by two schemes：
1. the voltage drop on real-time detection motor controller (trigger or catalyst) contact and electric current, to be obtained with this
The internal resistance of contact, if internal resistance is not in set point, illustrates to break down in contact.
Specifically, testing circuit (not shown in figure 1) may include voltmeter and ammeter, wherein, connects in parallel for voltmeter
It is connected to contact, to detect the voltage at contact two ends, ammeter is connected to contact, to detect the electric current flowing through contact, root
Obtain the internal resistance of contact according to the voltage and current being detected, if internal resistance is not in set point, judge to break down in contact.
Wherein, the design parameter according to motor starter to be detected, the set point of internal resistance can pass through device touch screen
Interface is flexibly arranged, and the setting principle of internal resistance is：Escape and be likely to occur under detected motor starter normal operation
The internal resistance of minimum and maximum contact.The set point of internal resistance passes through software design patterns according to motor controller parameter.
2. real-time detection motor controller (trigger or catalyst) contact temperature, when temperature exceedes set threshold value, says
Break down in bright contact.
Specifically, testing circuit may include temperature sensor, wherein, detects the temperature of contact using temperature sensor, such as
Fruit temperature exceedes temperature threshold, then judge to break down in contact.
Wherein, the design parameter according to motor starter to be detected, temperature threshold is to pass through device touch screen interface
Flexibly arranged, the setting principle of temperature threshold is：Escape and be likely to occur under detected motor starter normal operation
Minimum and maximum contact temperature.Software design patterns are passed through according to motor controller parameter.
Alternatively, detection method also includes, by the data being detected by testing circuit transmit in a wired or wireless manner to
Server.
By above-mentioned steps, it is possible to achieve to the closure of high speed motor car motor controller (trigger or catalyst) contact and
The detection of large span voltage during disconnection, when solving the problems, such as the closing of contact and disconnecting, voltage span is difficult to greatly sample.By interior
Put the high voltage after protection circuit inhibits contact to disconnect, and add difference amplifier for the little feature of contact voltage pressure drop
Improve certainty of measurement.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in certain embodiment
The part describing in detail, may refer to the associated description of other embodiment.
It should be understood that disclosed technology contents in several embodiments provided herein, can pass through other
Mode is realized.Wherein, device embodiment described above is only the schematically division of for example described unit, Ke Yiwei
A kind of division of logic function, actual can have other dividing mode when realizing, for example multiple units or assembly can in conjunction with or
Person is desirably integrated into another system, or some features can be ignored, or does not execute.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of unit or module or communication link
Connect, can be electrical or other form.
The described unit illustrating as separating component can be or may not be physically separate, show as unit
The part showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.The purpose to realize this embodiment scheme for some or all of unit therein can be selected according to the actual needs.
In addition, can be integrated in a processing unit in each functional unit in each embodiment of the present invention it is also possible to
It is that unit is individually physically present it is also possible to two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be to be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If described integrated unit is realized and as independent production marketing or use using in the form of SFU software functional unit
When, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part in other words prior art being contributed or all or part of this technical scheme can be in the form of software products
Embody, this computer software product is stored in a storage medium, including some instructions with so that a computer
Equipment (can be personal computer, server or network equipment etc.) execution each embodiment methods described of the present invention whole or
Part steps.And aforesaid storage medium includes：USB flash disk, read only memory (ROM, Read-OnlyMemory), random access memory are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can be with store program codes
Medium.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (16)
1. a kind of device of the contact electric shock state of detection motor controller is it is characterised in that include：
Protection circuit, has two inputs of the contact being respectively connecting to described motor controller；
Difference amplifier, has two inputs of two outfans being respectively connecting to described protection circuit；And
Testing circuit, connects the result of variations of the parameter detecting described contact to the described contact of described motor controller, and root
According to the result of variations of described parameter, determine the electric shock state of described contact, wherein, the electric shock state of described contact at least includes touching
Point closure and contact fault.
2. device according to claim 1 it is characterised in that
Described protection circuit includes the first current-limiting resistance, the second current-limiting resistance and is connected to described first current-limiting resistance and described
Protection device between two current-limiting resistances, wherein,
One end of described first current-limiting resistance one of connects to described contact, and the other end of described first current-limiting resistance connects
To the first end of described protection device,
One end of described second current-limiting resistance connect to described contact corresponding another, described second current-limiting resistance another
One end connects to the second end of described protection device,
The described first end of described protection device and described second end connect to described differential amplification as described two outfans
Described two inputs of device.
3. device according to claim 2 it is characterised in that
Described protection device is Transient Suppression Diode, and the device being connected with protection device is difference amplifier.
4. device according to claim 1 it is characterised in that
Described testing circuit includes voltmeter and ammeter, wherein,
Described voltmeter is connected in parallel to described contact, and to detect the voltage at described contact two ends, voltmeter exports connection device control
Device processed, changes post processing by the A/D converter of controller,
Described ammeter is connected to described contact, and to detect the electric current flowing through described contact, ammeter exports connection device control
Device processed, changes post processing by the A/D converter of controller,
Described testing circuit obtains the internal resistance of described contact according to the voltage and current being detected, if described internal resistance is not setting
In the range of, then judge to break down in described contact.
5. device according to claim 4 it is characterised in that
According to the design parameter of motor starter to be detected, the set point of internal resistance can carry out spirit by device touch screen interface
Live and arrange, the setting principle of internal resistance is：Escape the minimum being likely to occur under detected motor starter normal operation and
Big contact internal resistance, described set point is to pass through software design patterns according to motor controller parameter.
6. device according to claim 1 it is characterised in that
Described testing circuit includes temperature sensor, and wherein, temperature sensor exports connection device controller, by the A/D of controller
Transducer changes post processing,
Described temperature sensor detects the temperature of described contact, if described temperature exceedes temperature threshold, judges described contact
Break down.
7. device according to claim 6 it is characterised in that
According to the design parameter of motor starter to be detected, temperature threshold is flexibly can be set by device touch screen interface
Put, the setting principle of temperature threshold is：Escape the minimum being likely to occur under detected motor starter normal operation and
Big contact temperature, described temperature threshold is to pass through software design patterns according to motor controller parameter.
8. device according to claim 1 is it is characterised in that described device also includes：
Transport part, connects to described testing circuit, will be passed in a wired or wireless manner by the data that described testing circuit detects
Transport to server.
9. a kind of method of the contact electric shock state of detection motor controller is it is characterised in that include：
Two inputs of protection circuit are respectively connecting to the contact of described motor controller；
Two inputs of difference amplifier are respectively connecting to two outfans of described protection circuit；And
Testing circuit is connected to the described contact of described motor controller, to detect the result of variations of the parameter of described contact,
And the result of variations according to described parameter, determine the electric shock state of described contact, wherein, the electric shock state of described contact is at least wrapped
Include the closing of contact and contact fault.
10. method according to claim 9 it is characterised in that
Described protection circuit includes the first current-limiting resistance, the second current-limiting resistance and is connected to described first current-limiting resistance and described
Protection device between two current-limiting resistances, wherein, two inputs of described protection circuit is respectively connecting to motor controller
Contact include：
One of one end of described first current-limiting resistance is connected to described contact, by one end of described second current-limiting resistance even
Be connected in described contact corresponding another, wherein, described protection device is connected to the other end of described first current-limiting resistance
And the other end of described second current-limiting resistance between.
11. methods according to claim 10 it is characterised in that
Described protection device is Transient Suppression Diode, and the device being connected with described protection device is difference amplifier.
12. methods according to claim 9 it is characterised in that
Described testing circuit includes voltmeter and ammeter, wherein,
Described voltmeter is connected in parallel to described contact, to detect the voltage at described contact two ends, voltmeter exports connection device
Controller, changes post processing by the A/D converter of controller,
Described ammeter is connected to described contact, to detect the electric current flowing through described contact, ammeter exports connection device
Controller, changes post processing by the A/D converter of controller,
Obtain the internal resistance of described contact according to the voltage and current being detected, if described internal resistance, not in set point, is sentenced
Break down in disconnected described contact.
13. methods according to claim 12 it is characterised in that
According to the design parameter of motor starter to be detected, the set point of internal resistance can carry out spirit by device touch screen interface
Live and arrange, the setting principle of internal resistance is：Escape the minimum being likely to occur under detected motor starter normal operation and
Big contact internal resistance, described set point is to pass through software design patterns according to motor controller parameter.
14. methods according to claim 9 it is characterised in that
Described testing circuit includes temperature sensor, and wherein, temperature sensor exports connection device controller, by the A/D of controller
Transducer changes post processing,
Detect the temperature of described contact using described temperature sensor, if described temperature exceedes temperature threshold, judge described
Break down in contact.
15. methods according to claim 14 it is characterised in that
According to the design parameter of motor starter to be detected, temperature threshold is flexibly can be set by device touch screen interface
Put, the setting principle of temperature threshold is：Escape the minimum being likely to occur under detected motor starter normal operation and
Big contact temperature, described temperature threshold is to pass through software design patterns according to motor controller parameter.
16. methods according to claim 9 are it is characterised in that methods described also includes：
The data being detected by described testing circuit is transmitted in a wired or wireless manner to server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792137.4A CN106443429B (en) | 2016-08-31 | 2016-08-31 | Detect the device and method of the contact electric shock state of motor controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792137.4A CN106443429B (en) | 2016-08-31 | 2016-08-31 | Detect the device and method of the contact electric shock state of motor controller |
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| CN106443429A true CN106443429A (en) | 2017-02-22 |
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| CN201610792137.4A Active CN106443429B (en) | 2016-08-31 | 2016-08-31 | Detect the device and method of the contact electric shock state of motor controller |
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| CN107192941A (en) * | 2017-05-03 | 2017-09-22 | 广州供电局有限公司 | The analysis method and management method of breaker dynamic load ability |
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| CN102830347A (en) * | 2012-08-04 | 2012-12-19 | 桂林理工大学 | Intelligent experiment method for electrical property of electrician contact |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106443429B (en) | 2019-03-05 |
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