CN106300250B - Charging circuit interruption means and charging circuit self-detection method - Google Patents
Charging circuit interruption means and charging circuit self-detection method Download PDFInfo
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- CN106300250B CN106300250B CN201510262107.8A CN201510262107A CN106300250B CN 106300250 B CN106300250 B CN 106300250B CN 201510262107 A CN201510262107 A CN 201510262107A CN 106300250 B CN106300250 B CN 106300250B
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Abstract
The invention discloses a kind of charging circuit interruption means, the input voltage of the first input power cord of electric system and the second input power cord is provided to output system, comprising: current measuring element, self detection device and controller.Current measuring element executes earth leakage detection functions, when detecting that the first input power cord and the second input power cord have current difference, issues electric leakage signal.Self detection device generates bypass path according to detection enable signal, and the first input power cord and the second input power cord is made to have current difference.When operating in self detection pattern, controller issues detection enable signal, and when receiving electric leakage signal, controller judges that earth leakage detection functions are normal and input voltage is provided to output system.
Description
Technical field
The present invention about a kind of charging circuit interruption means and method, particularly with regard to one kind there is self detection to leak
The charging circuit interruption means and method of electric-examination brake.
Background technique
When system is coupled to electric system, powering in the cutting immediately instantly leaked electricity being capable of effective maintenance personnel
Safety.Therefore, how to ensure that earth leakage detection functions normal operation becomes extremely important, so we need one to can oneself
I detects the apparatus and method of earth leakage detection functions.
Summary of the invention
In view of this, the present invention proposes a kind of charging circuit interruption means, to input the one first of unified power system
Power supply line is coupled to one first output power line of an output system and one second input power cord by above-mentioned electric system
It is coupled to one second output power line of above-mentioned output system, so that above-mentioned electric system provides an input voltage to above-mentioned output
System a, comprising: current measuring element, self detection device and a controller.Above-mentioned current measuring element executes a leakage
Electric-examination brake, wherein when the section for detecting above-mentioned first input power cord and above-mentioned second input power cord has one
When current difference, above-mentioned current measuring element issues an electric leakage signal.Self above-mentioned detection device is produced according to a detection enable signal
Raw bypass path, and a test electric current is made to flow to above-mentioned second input electricity from a first node of above-mentioned first input power cord
One second node of source line, so that above-mentioned section has above-mentioned current difference.Above controller operates in one certainly when above controller
Above-mentioned detection enable signal is issued when my detection pattern, wherein when above controller receives above-mentioned electric leakage signal, above-mentioned control
Device processed judges that above-mentioned earth leakage detection functions are normal, stops exporting above-mentioned detection enable signal and enters a normal mode, and will be upper
It states input voltage and is provided to above-mentioned output system.
An embodiment according to the present invention, above controller is not in receiving above-mentioned electric leakage signal in a given time
When, above controller judges above-mentioned earth leakage detection functions failure, and forbids above-mentioned input voltage being provided to above-mentioned output system.
An embodiment according to the present invention, when above controller operates in above-mentioned normal mode and receives above-mentioned electric leakage letter
Number, above controller forbids above-mentioned input voltage being provided to above-mentioned output system, wherein when above controller operate in it is above-mentioned
Normal mode and when not receiving above-mentioned electric leakage signal, above controller continues above-mentioned input voltage being provided to above-mentioned output system
System.
An embodiment according to the present invention, above controller judge the voltage model of above-mentioned input voltage according to a voltage signal
It encloses and exports a status signal, self above-mentioned detection device operates in a first mode or one second according to above-mentioned status signal
Mode.
An embodiment according to the present invention, above-mentioned charging circuit interruption means further includes a voltage check device, to examine
It surveys the above-mentioned input voltage of above-mentioned first input power cord and above-mentioned second input power cord and generates above-mentioned voltage signal,
Middle above controller judges that above-mentioned input voltage is located at a first voltage range and a second voltage according to above-mentioned voltage signal
The one of range, wherein self above-mentioned detection device operates in above-mentioned when above-mentioned input voltage is when above-mentioned first voltage range
First mode, wherein self above-mentioned detection device operates in above-mentioned when above-mentioned input voltage is when above-mentioned second voltage range
Two modes.
An embodiment according to the present invention, self above-mentioned detection device include: a first resistor, one first detection switch,
One second resistance and one second detection switch.Above-mentioned first resistor is coupled to above-mentioned first node and one first internal node
Between.Above-mentioned first internal node is coupled to inside one second by above-mentioned first detection switch according to above-mentioned detection enable signal
Node.Above-mentioned second resistance is coupled between above-mentioned second internal node and above-mentioned second node.Above-mentioned second detection switch
Above-mentioned second internal node is coupled to above-mentioned second node according to above-mentioned status signal.
An embodiment according to the present invention, when self above-mentioned detection device operates in above-mentioned first mode, above-mentioned first
Above-mentioned first internal node is coupled to above-mentioned second internal node by detection switch, and above-mentioned second detection switch is by above-mentioned second
Internal node is coupled to above-mentioned second node, when self above-mentioned detection device operates in above-mentioned second mode, above-mentioned first inspection
It surveys switch and above-mentioned first internal node is coupled to above-mentioned second internal node, and above-mentioned second detection switch is not turned on, wherein
When above controller operates in above-mentioned normal mode, above-mentioned first detection switch and above-mentioned second detection switch
All it is not turned on, wherein
In above-mentioned first mode and above-mentioned second mode, self above-mentioned detection device generates identical above-mentioned test electricity
Stream.
An embodiment according to the present invention, above-mentioned first detection switch and above-mentioned second detection switch are respectively a photoelectricity
Coupling element.
An embodiment according to the present invention, above-mentioned charging circuit interruption means further include: a first switch and one second
Switch.Above-mentioned first input power cord is coupled to above-mentioned first output electricity according to a first switch signal by above-mentioned first switch
Source line.Above-mentioned second input power cord is coupled to above-mentioned second output electricity according to a second switch signal by above-mentioned second switch
Source line, wherein when above controller operates in self above-mentioned detection pattern and judges that above-mentioned earth leakage detection functions are normal, it is above-mentioned
Above-mentioned input voltage is provided to above-mentioned output system using above-mentioned first switch signal and above-mentioned second switch signal by controller
System, wherein above controller utilizes above-mentioned first switch signal when above controller judges the failure of above-mentioned earth leakage detection functions
And above-mentioned input voltage is provided to above-mentioned output system by above-mentioned second switch signal-inhibiting.
An embodiment according to the present invention, when above controller operates in above-mentioned normal mode and receives above-mentioned electric leakage letter
Number when, above controller is provided above-mentioned input voltage using above-mentioned first switch signal and above-mentioned second switch signal-inhibiting
Extremely above-mentioned output system, wherein when above controller operates in above-mentioned normal mode and do not receive above-mentioned electric leakage signal, on
State controller continue for above-mentioned input voltage to be provided to using above-mentioned first switch signal and above-mentioned second switch signal it is above-mentioned
Output system.
The present invention more proposes a kind of charging circuit self-detection method, is suitable for a charging circuit interruption means for an electric power
One first input power cord of system is coupled to one first output power line of an output system and by above-mentioned electric system
One second input power cord is coupled to one second output power line of above-mentioned output system, so that above-mentioned electric system offer one is defeated
Enter voltage to above-mentioned output system, comprising: when above-mentioned charging circuit interruption means operates in self detection pattern, output one
Enable signal is detected, wherein self above-mentioned detection pattern detects an earth leakage detection functions to self；According to above-mentioned detection enable
Signal and utilize self detection device to generate bypass path, make a test electric current from the 1 of above-mentioned first input power cord the
One node-flow to above-mentioned second input power cord a second node so that above-mentioned first input power cord and above-mentioned second defeated
The section for entering power supply line has a current difference；When detecting that above-mentioned section has above-mentioned current difference, an electric leakage signal is generated；
When receiving above-mentioned electric leakage signal, judge that above-mentioned earth leakage detection functions are normal；Above-mentioned charging circuit interruption means is operated in
One normal mode；And above-mentioned input voltage is provided to above-mentioned output system.
An embodiment according to the present invention, further includes: in not receiving above-mentioned electric leakage signal in a given time；Judgement
Above-mentioned earth leakage detection functions failure；And forbid above-mentioned input voltage being provided to above-mentioned output system.
An embodiment according to the present invention, further includes: when above-mentioned charging circuit interruption means operates in above-mentioned normal mode
And when receiving above-mentioned electric leakage signal, forbid above-mentioned input voltage being provided to above-mentioned output system；And when above-mentioned charging electricity
When road interruption means operates in above-mentioned normal mode and do not receive above-mentioned electric leakage signal, continue for above-mentioned input voltage to be provided to
Above-mentioned output system.
An embodiment according to the present invention, it is above-mentioned to utilize self above-mentioned detection device to produce according to above-mentioned detection enable signal
The step of raw above-mentioned bypass path, further includes: judging the voltage range of above-mentioned input voltage according to a voltage signal and exports a shape
State signal；And according to above-mentioned status signal, self above-mentioned detection device is operated in into a first mode or a second mode.
An embodiment according to the present invention, further includes: above-mentioned first input power cord of detection and above-mentioned second input electricity
The above-mentioned input voltage of source line and send above-mentioned voltage signal；On judging that above-mentioned electric system is just being provided according to above-mentioned voltage signal
Input voltage is stated, above-mentioned detection enable signal is exported；Judge that above-mentioned input voltage is located at one first electricity according to above-mentioned voltage signal
Press the one of range and a second voltage range；When above-mentioned input voltage is when above-mentioned first voltage range, by it is above-mentioned self
Detection device operates in above-mentioned first mode；And when above-mentioned input voltage is when above-mentioned second voltage range, by it is above-mentioned self
Detection device operates in above-mentioned second mode.
An embodiment according to the present invention, self above-mentioned detection device include: a first resistor, one first detection switch,
One second resistance and one second detection switch.Above-mentioned first resistor is coupled to above-mentioned first node and one first internal node
Between.Above-mentioned first internal node is coupled to inside one second by above-mentioned first detection switch according to above-mentioned detection enable signal
Node.Above-mentioned second resistance is coupled between above-mentioned second internal node and above-mentioned second node.Above-mentioned second detection switch
Above-mentioned second internal node is coupled to above-mentioned second node according to above-mentioned status signal.
An embodiment according to the present invention, above-mentioned charging circuit self-detection method further include: when self above-mentioned detection dress
It sets when operating in above-mentioned first mode, above-mentioned first internal node is coupled in above-mentioned second using above-mentioned first detection switch
Portion's node, and above-mentioned second internal node is coupled to above-mentioned second node using above-mentioned second detection switch；When by it is above-mentioned from
When my detection device operates in above-mentioned second mode, above-mentioned first internal node is coupled to using above-mentioned first detection switch
The second internal node is stated, and is not turned on above-mentioned second detection switch, wherein in above-mentioned first mode and above-mentioned second mode,
Self above-mentioned detection device generates identical above-mentioned test electric current；And when above-mentioned charging circuit interruption means operate in it is above-mentioned just
When norm formula, it is not turned on above-mentioned first detection switch and above-mentioned second detection switch.
An embodiment according to the present invention, above-mentioned first detection switch and above-mentioned second detection switch are respectively a photoelectricity
Coupling element.
An embodiment according to the present invention, above-mentioned charging circuit self-detection method further include: when in above-mentioned charging circuit
When disconnected device operates in self above-mentioned detection pattern and judges that above-mentioned earth leakage detection functions are normal, generate a first switch signal with
An and second switch signal；According to above-mentioned first switch signal and above-mentioned second switch signal, above-mentioned input voltage is provided
To above-mentioned output system；When above-mentioned charging circuit interruption means operates in self above-mentioned detection pattern and judges above-mentioned detection of electrical leakage
When function fails, above-mentioned first switch signal and above-mentioned second switch signal are generated；And utilize above-mentioned first switch signal
And above-mentioned second switch signal, forbid above-mentioned input voltage being provided to above-mentioned output system.
An embodiment according to the present invention, above-mentioned charging circuit self-detection method further include: when in above-mentioned charging circuit
When disconnected device operates in above-mentioned normal mode and receives above-mentioned electric leakage signal, above-mentioned first switch signal and above-mentioned are generated
Two switching signals；According to above-mentioned first switch signal, forbid above-mentioned input voltage being provided to above-mentioned output system；It is filled when above-mentioned
When electric circuit interrupting device operates in above-mentioned normal mode and do not receive above-mentioned electric leakage signal, above-mentioned first switch signal is generated
And above-mentioned second switch signal；It, persistently will be above-mentioned and according to above-mentioned first switch signal and above-mentioned second switch signal
Input voltage is provided to above-mentioned output system.
Detailed description of the invention
Fig. 1 is the block diagram for showing charging circuit interruption means described in an embodiment according to the present invention；
Fig. 2 is the circuit diagram for showing self detection device described in an embodiment according to the present invention；
Fig. 3 is the circuit diagram for showing detection switch described in an embodiment according to the present invention；And
Fig. 4 is the flow chart for showing charging circuit self-detection method described in an embodiment according to the present invention.
Appended drawing reference:
100 charging circuit interruption means
101 voltage check devices
102 controllers
103 current measuring elements
104,200 self detection device
105 first switches
106 second switches
110 electric system
120 output systems
201 first resistors
202 first detection switch
203 second resistances
204 second detection switch
300 detection switch
301 optical coupling elements
302 first current-limiting resistances
303 transistors
304 first bias resistances
305 second bias resistances
310 light emitting diodes
320 optotransistors switch
The first input power cord of L_IN
The second input power cord of N_IN
PE ground line
The first output power line of L_OUT
The second output power line of N_OUT
PE_OUT output ground line
XL first node
XN second node
The first internal node of X1
The second internal node of X2
SV voltage signal
SM status signal
SL electric leakage signal
EN detects enable signal
IT tests electric current
IIN flows into electric current
IOUT flows out electric current
IL glow current
SC1 first switch signal
SC2 second switch signal
C1 first switch node
C2 second switch node
CT switch control node
S1~S7 steps flow chart
Specific embodiment
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, hereafter especially exemplified by a preferred embodiment, and
Cooperate institute's accompanying drawings, to be described in detail below:
Preferred embodiment according to the present invention described below.It must be noted that the present invention provides many
Applicable concept of the invention, disclosed specific embodiment, is only for explanation and reaches and use certain party of the invention herein
Formula, without can be used to limit to the scope of the present invention.
Fig. 1 is the block diagram for showing charging circuit interruption means described in an embodiment according to the present invention.Such as Fig. 1 institute
Show, charging circuit interruption means 100 is to be provided to output system 120, electric system for the input voltage of electric system 110
110 the first input power cord L_IN and the second input power cord N_IN is respectively coupled to the first output of output system 120
Power supply line L_OUT and the second output power line N_OUT, the ground line PE of electric system 110 are substantially coupled to output system
120 output is grounded PE_OUT.An embodiment according to the present invention is grounded between PE and output ground line PE_OUT and has
There is an impedor, wherein the impedor is to obstruct noise.
Charging circuit interruption means 100 include voltage check device 101, controller 102, current measuring element 103, self
Detection device 104, first switch 105 and second switch 106.The first of the detection electric system 110 of voltage check device 101 is defeated
Enter power supply line L_IN and the second input power cord N_IN and issue voltage signal SV to controller 102, controller 102 is according to electricity
When pressure signal SV judges that electric system 110 provides input voltage, output detection enable signal EN to self detection device 104.
An embodiment according to the present invention, current measuring element 103 have current detection function, flow into and flow to detect
Current differential out such as can detect the inflow electric current IIN of the first input power cord L_IN when electric system 110 inputs positive half cycle
And second input power cord N_IN outflow electric current IOUT, when flow into electric current IIN and outflow electric current IOUT have an electric current
When poor, current measuring element 103 issues electric leakage signal SL to controller 102.When controller 102 receives electric leakage signal SL,
Controller 102 then stops the input voltage of the first input power cord L_IN and the second input power cord N_IN being provided to output
System 120.An embodiment according to the present invention, current measuring element 103 are a current transformer (current
transformer)。
An embodiment according to the present invention, when controller 102 determines the input voltage of electric system 110 being provided to output
When system 120, controller 102 is using first switch signal SC1 conducting first switch 105 and utilizes second switch signal SC2
Second switch 106 is connected.According to another embodiment of the present invention, when controller 102 determines the not input electricity by electric system 110
Pressure is when being provided to output system 120, and controller 102 using first switch signal SC1 is not turned on first switch 105 and utilizes the
Two switching signal SC2 are not turned on second switch 106.
Controller 102 operates in a normal mode and self detection pattern.When controller 102 operates in normal mode
When, the input voltage of electric system 110 is provided to output system 120 by controller 102, and is examined using current measuring element 103
Flow measurement enters whether electric current and outflow electric current have a current difference and issue electric leakage signal SL.
An embodiment according to the present invention, when controller 102 operates in normal mode, if controller 102 is according to electric leakage
Signal SL discovery flows into electric current IIN not equal to outflow electric current IOUT, that is, represents and leak electricity, controller 102 utilizes first immediately
Switching signal SC1 is not turned on first switch 105 and is not turned on second switch 106 using second switch signal SC2, and stopping will be electric
The input voltage of Force system 110 is provided to output system 120.
According to another embodiment of the present invention, when controller 102 operates in normal mode, if controller 102 does not connect
Electric leakage signal SL is received, that is, represents operation normally, then controller 102 utilizes first switch signal SC1 and second switch signal
SC2 continues the input voltage of electric system 110 being provided to output system 120.
An embodiment according to the present invention, before controller 102 enters normal mode, that is, again by electric system 110
Input voltage be provided to before output system 120, controller 102 first operates in self detection pattern, to self detection electricity
Whether the detection function for flowing detecting element 103 is normal.When controller 102 operates in self detection pattern, controller 102 is utilized
Self detection device 104 of enable signal EN enable is detected, self detection device 104 makes to test immediately electric current IT from first node
XL flow to second node XN, thus causes the first input power cord L_IN and second detected of current measuring element 103 defeated
Enter the inflow electric current IIN of the section of power supply line N_IN not equal to outflow electric current IOUT, the case where to simulate practical electric leakage, and oneself
Whether the detection function that I detects current measuring element 103 is normal.
Voltage signal SV that controller 102 is more issued according to voltage detecting circuit 101 and the voltage for judging input voltage
Range, controller 102 more according to the voltage range of input voltage and output status signal SM is to self detection device 104 so that
For input voltage when different voltage ranges, test electric current IT is all identical.It is carried out below for how to generate test electric current IT
Detailed description.
When controller 102 operates in self detection pattern, if current measuring element 103 detect flow into electric current IIN with
And outflow electric current IOUT has current difference and issues electric leakage signal SL to controller 102, when controller 102 receives electric leakage signal
The detection function that SL represents current measuring element 103 is normal.I.e. using first control signal SC1 be connected first switch 105 with
And second switch 106 is connected using second switch signal SC2, so that the input voltage of electric system 110 is provided to output system
120。
When controller 102 operates in self detection pattern, if current measuring element 103 does not issue electric leakage signal SL, generation
The detection function of table current measuring element 103 is abnormal.An embodiment according to the present invention, when controller 102 does not receive
When electric leakage signal SL, then using first control signal SC1 and second control signal SC2 be persistently not turned on first switch 105 with
And second switch 106, to stop the input voltage of electric system 110 being provided to output system 120.
When controller 102 operate in normal mode and current measuring element 103 detect flow into electric current IIN and outflow electricity
When flowing IOUT has the first current difference, current measuring element 103 issues electric leakage signal SL；When controller 102 operates in self inspection
When survey mode and current measuring element 103 detect that flowing into electric current IIN and outflow electric current IOUT has the second current difference, electric current
Detecting element 103 issues electric leakage signal SL.An embodiment according to the present invention, the first current difference are equal to the second current difference；According to
Another embodiment of the present invention, the first current difference are not equal to the second current difference.
According to another embodiment of the present invention, when controller 102 operates in self detection pattern and in a given time
When not receiving electric leakage signal SL inside, controller 102 judges the earth leakage detection functions failure of current measuring element 103, and holds
Continuous first switch 105 and the second switch 106 of being not turned on is by 120 open circuit of electric system 110 and output system.According to the present invention
An embodiment represent current measuring element 103 when controller 102 is not when receiving electric leakage signal SL in given time
Detection function it is abnormal, controller 102 more issue one warning, to inform that exception occurs in user's current measuring element 103.
An embodiment according to the present invention, when controller 102 operates in self detection pattern and in 60 milliseconds (msec)
When not receiving electric leakage signal SL inside, controller 102 judges the earth leakage detection functions failure of current measuring element 103.According to
The other embodiment of the present invention, designer can decide the length of given time in its sole discretion.
Fig. 2 is the circuit diagram for showing self detection device described in an embodiment according to the present invention.As shown in Fig. 2, from
I includes first resistor 201, the first detection switch 202, second resistance 203 and the second detection switch 204 at detection device 200,
Wherein self detection device 200 is coupled between the first node XL and second node XN of Fig. 1.According to the present invention one implements
Example, the first detection switch 202 and the second detection switch 204 are respectively optocoupler components.
As shown in Fig. 2, first resistor 201 is coupled between first node XL and the first internal node X1, the first detection
Switch 202 is a detection switch, which has first switch node C1, second switch node C2 and switch control section
Point CT, wherein first switch node C1 is coupled to second switch node C2 to control by switch control node CT.First detection
The detection enable signal EN that switch 202 is issued according to the controller 102 of Fig. 1, the first internal node X1 is coupled to inside second
Nodes X 2.Second resistance 203 is coupled between the second internal node X2 and second node XN, 204 basis of the second detection switch
Status signal SM and the second internal node X2 is coupled to second node XN.
An embodiment according to the present invention, when self detection device 200 operates in first mode, the first detection switch
First internal node X1 is coupled to the second internal node X2 by 202, and the second detection switch 204 couples the second internal node X2
To second node XN.According to another embodiment of the present invention, when self detection device 200 operates in second mode, the first inspection
It surveys switch 202 and first internal node X1 is coupled to the second internal node X2, and the second detection switch 204 is not turned on.According to this
Another embodiment of invention, when self detection device 200 does not receive detection enable signal EN, the first detection switch 202
And second detection switch 204 be all not turned on.
An embodiment according to the present invention, when input voltage is between 100~120V, status signal SM is examined second
It surveys switch 204 to be connected, so that test electric current IT.According to another embodiment of the present invention, when input voltage be located at 200~240V it
Between when, the second detection switch 204 is not turned on by status signal SM.Also, first resistor 201 and second resistance 203 have phase
Same impedance.
Therefore, when input voltage is 200~240V, test electric current IT flows through first resistor 201 and second resistance
203, when input voltage is 100~120V, test electric current IT flows only through first resistor 201.It is, self detection device
200 to generate the test electric current IT of same current value when input voltage is different voltage range.
Fig. 3 is the circuit diagram for showing detection switch described in an embodiment according to the present invention.Detection switch shown in Fig. 3
300 be the first detection switch 202 of Fig. 2 and an embodiment of the second detection switch 204.As shown in figure 3, detection switch 300
With first switch node C1, second switch node C2 and switch control node CT, and including optical coupling element 301, first
Current-limiting resistance 302, transistor 303, the first bias resistance 304 and the second bias resistance 305.
Optical coupling element 301 includes light emitting diode 310 and optotransistor switch 320, and optotransistor switch 320 utilizes
First switch node C1 is coupled to be connected by the luminous energy that light emitting diode 310 is generated because flowing through glow current IL
Two switching node C2.When transistor 303 is connected, glow current IL flow to output ground line PE_ from direct current supply voltage VDD
OUT, size of first current-limiting resistance 302 to control glow current IL.Switch control node CT is coupled to control signal and saturating
It crosses the first bias resistance 304 and the second bias resistance 305 forms an electric resistance partial pressure, to appropriate bias transistor 303.Wherein
It can achieve the purpose of electrical isolation using optical coupling element 301.
An embodiment according to the present invention, when needing continuity test switch 300, switch control node CT inputs high logic
Transistor 303 is connected in level.Optotransistor is turned on when light emitting diode 310 flows through luminous energy caused by glow current IL
When switch 320, first switch node C1 is coupled to second switch node C2 immediately.
Fig. 4 is the flow chart for showing charging circuit self-detection method described in an embodiment according to the present invention.Below
The Fig. 1 that arranges in pairs or groups is described in detail for the narration of the flow chart of Fig. 4.
Firstly, generating detection enable signal EN (step S1) according to voltage signal SV.When voltage check device 101 detects
The input voltage of first input power cord L_IN and the second input power cord N_IN and send voltage signal SV, controller 102
Judge that electric system 110 is providing input voltage according to voltage signal SV, and export detection enable signal EN and enable self
Detection device 104.Then, the controller 102 of Fig. 1 is according to voltage signal SV, judge input voltage be located at first voltage range with
And the one (step S2) of second voltage range.
When input voltage is when first voltage range, controller 102 is grasped self detection device 104 using status signal SM
Make in first mode (step S3), that is, the first detection switch 202 of Fig. 2 saves the first inside due to detecting enable signal EN
Point X1 is coupled to the second internal node X2, and the second detection switch 204 of Fig. 2 due to status signal SM by the second internal node X2
It is coupled to second node XN.
When input voltage is when second voltage range, controller 102 is grasped self detection device 104 using status signal SM
Make in second mode (step S4), that is, the first detection switch 202 of Fig. 2 saves the first inside due to detecting enable signal EN
Point X1 is coupled to the second internal node X2, and the second detection switch 204 of Fig. 2 is not turned on because of status signal SM.
In step S3 and step S4, self detection device 104 makes to test electric current IT certainly according to detection enable signal EN
The first node XL of first input power cord L_IN flow to the second node XN of the second input power cord N_IN, causes current detecting
The inflow electric current IIN of the section of the first input power cord L_IN detected of element 103 and the second input power cord N_IN is not
Equal to outflow electric current IOUT, and generate the current difference of the first input power cord L_IN and the second input power cord N_IN.Work as electricity
When stream detecting element 103 detects the current difference of the first input power cord L_IN and the second input power cord N_IN, leakage is generated
Electric signal SL.An embodiment according to the present invention, when self detection device 104 operates in first mode and second mode, all
Generate identical test electric current IT.
Then, controller 102 is according to whether receive electric leakage signal SL, and judge the electric leakage inspection of current measuring element 103
Whether brake is normal (step S5).When receiving electric leakage signal SL, controller 102 judges the leakage of current measuring element 103
Electric-examination brake is positive normal (step S6), and controller 102 enters normal mode.When not receiving electric leakage signal SL,
Controller 102 judge the earth leakage detection functions of current measuring element 103 for failure (step S7), and controller 102 forbid by
Input voltage is provided to output system 120.
The feature of many embodiments described above makes those of ordinary skill in the art clearly understood that this
The form of specification.Those of ordinary skill in the art it will be appreciated that its using disclosure of the present invention based on
It completes the purpose for being identical to above-described embodiment and/or reaches to be identical to above-mentioned implementation to design or change other processing procedures and structure
The advantages of example.Those of ordinary skill in the art is not also it will be appreciated that depart from the equivalent of the spirit and scope of the present invention
Construction can be made arbitrarily to change without departing from the spirit and scope of the present invention, substitute and retouching.
Claims (18)
1. a kind of charging circuit interruption means, which is characterized in that couple one first input power cord of unified power system
It is coupled to one first output power line of an output system and by one second input power cord of above-mentioned electric system above-mentioned
One second output power line of output system, so that above-mentioned electric system provides an input voltage to above-mentioned output system, comprising:
One current measuring element executes an earth leakage detection functions, wherein when detecting above-mentioned first input power cord and above-mentioned
When one section of the second input power cord has a current difference, above-mentioned current measuring element issues an electric leakage signal；
One self detection device generates bypass path according to a detection enable signal, and makes a test electric current from above-mentioned first
One first node of input power cord flow to a second node of above-mentioned second input power cord, so that above-mentioned section is with above-mentioned
Current difference；And
One controller issues above-mentioned detection enable signal when above controller operates in self detection pattern,
Wherein when above controller receives above-mentioned electric leakage signal, above controller judges that above-mentioned earth leakage detection functions are normal,
Stop exporting above-mentioned detection enable signal and enter a normal mode, and above-mentioned input voltage is provided to above-mentioned output system；
Above controller judges the voltage range of above-mentioned input voltage according to a voltage signal and exports a status signal, it is above-mentioned from
My detection device operates in a first mode or a second mode according to above-mentioned status signal；
Self above-mentioned detection device operates in the bypass path resistance difference under the first mode, the second mode, to input
The test electric current of same current value is generated when voltage is different voltage ranges.
2. charging circuit interruption means according to claim 1, which is characterized in that above controller is in a given time
When not receiving above-mentioned electric leakage signal, above controller judges above-mentioned earth leakage detection functions failure, and forbids above-mentioned input
Voltage is provided to above-mentioned output system.
3. charging circuit interruption means according to claim 1, which is characterized in that when above controller operate in it is above-mentioned just
Norm formula and above-mentioned electric leakage signal being received, above controller forbids above-mentioned input voltage being provided to above-mentioned output system,
In when above controller operates in above-mentioned normal mode and does not receive above-mentioned electric leakage signal, above controller persistently will be above-mentioned
Input voltage is provided to above-mentioned output system.
4. charging circuit interruption means according to claim 1, which is characterized in that further include:
One voltage check device, to detect the above-mentioned input of above-mentioned first input power cord and above-mentioned second input power cord
Voltage and generate above-mentioned voltage signal, wherein above controller judges that above-mentioned input voltage is located at one the according to above-mentioned voltage signal
The one of one voltage range and a second voltage range, wherein when above-mentioned input voltage is when above-mentioned first voltage range, on
It states self detection device and operates in above-mentioned first mode, wherein when above-mentioned input voltage is when above-mentioned second voltage range, it is above-mentioned
Self detection device operates in above-mentioned second mode.
5. charging circuit interruption means according to claim 4, which is characterized in that self above-mentioned detection device includes:
One first resistor is coupled between above-mentioned first node and one first internal node；
Above-mentioned first internal node is coupled to one second inside according to above-mentioned detection enable signal and saved by one first detection switch
Point；
One second resistance is coupled between above-mentioned second internal node and above-mentioned second node；And
Above-mentioned second internal node is coupled to above-mentioned second node according to above-mentioned status signal by one second detection switch.
6. charging circuit interruption means according to claim 5, which is characterized in that
When self above-mentioned detection device operates in above-mentioned first mode, above-mentioned first detection switch is by above-mentioned first internal node
It is coupled to above-mentioned second internal node, and above-mentioned second internal node is coupled to above-mentioned second section by above-mentioned second detection switch
Point, wherein
When self above-mentioned detection device operates in above-mentioned second mode, above-mentioned first detection switch is by above-mentioned first internal node
It is coupled to above-mentioned second internal node, and above-mentioned second detection switch is not turned on, wherein
When above controller operates in above-mentioned normal mode, above-mentioned first detection switch and above-mentioned second detection switch are neither
Conducting, wherein
In above-mentioned first mode and above-mentioned second mode, self above-mentioned detection device generates identical above-mentioned test electric current.
7. charging circuit interruption means according to claim 5, which is characterized in that above-mentioned first detection switch and above-mentioned
Second detection switch is respectively an optocoupler components.
8. charging circuit interruption means according to claim 3, which is characterized in that further include:
Above-mentioned first input power cord is coupled to above-mentioned first out-put supply according to a first switch signal by one first switch
Line；And
Above-mentioned second input power cord is coupled to above-mentioned second out-put supply according to a second switch signal by one second switch
Line, wherein when above controller operates in self above-mentioned detection pattern and judges that above-mentioned earth leakage detection functions are normal, above-mentioned control
Above-mentioned input voltage is provided to above-mentioned output system using above-mentioned first switch signal and above-mentioned second switch signal by device processed,
Wherein when above controller judges the failure of above-mentioned earth leakage detection functions, above controller using above-mentioned first switch signal and
Above-mentioned input voltage is provided to above-mentioned output system by above-mentioned second switch signal-inhibiting.
9. charging circuit interruption means according to claim 8, which is characterized in that when above controller operate in it is above-mentioned just
Norm formula and when receiving above-mentioned electric leakage signal, above controller is believed using above-mentioned first switch signal and above-mentioned second switch
Number forbid above-mentioned input voltage being provided to above-mentioned output system, wherein when above controller operates in above-mentioned normal mode and not
When receiving above-mentioned electric leakage signal, above controller is continued using above-mentioned first switch signal and above-mentioned second switch signal will
Above-mentioned input voltage is provided to above-mentioned output system.
10. a kind of charging circuit self-detection method, which is characterized in that be suitable for a charging circuit interruption means for a power train
One first input power cord of system is coupled to one first output power line of an output system and by the one of above-mentioned electric system
Second input power cord is coupled to one second output power line of above-mentioned output system, so that above-mentioned electric system provides an input
Voltage is to above-mentioned output system, comprising:
When above-mentioned charging circuit interruption means operates in self detection pattern, one detection enable signal of output, wherein above-mentioned
Self detection pattern detects an earth leakage detection functions to self；
Bypass path is generated using self detection device according to above-mentioned detection enable signal, makes a test electric current from above-mentioned
One first node of the first input power cord flow to a second node of above-mentioned second input power cord, so that above-mentioned first input
One section of power supply line and above-mentioned second input power cord has a current difference；
When detecting that above-mentioned section has above-mentioned current difference, an electric leakage signal is generated；
When receiving above-mentioned electric leakage signal, judge that above-mentioned earth leakage detection functions are normal；
Above-mentioned charging circuit interruption means is operated in into a normal mode；And
Above-mentioned input voltage is provided to above-mentioned output system；
Above-mentioned the step of generating above-mentioned bypass path using self above-mentioned detection device according to above-mentioned detection enable signal, more wraps
It includes:
The voltage range of above-mentioned input voltage is judged according to a voltage signal and exports a status signal；And
According to above-mentioned status signal, self above-mentioned detection device is operated in into a first mode or a second mode；
Self above-mentioned detection device operates in the bypass path resistance difference under the first mode, the second mode, to input
The test electric current of same current value is generated when voltage is different voltage ranges.
11. charging circuit self-detection method according to claim 10, which is characterized in that further include:
In not receiving above-mentioned electric leakage signal in a given time；
Judge above-mentioned earth leakage detection functions failure；And
Forbid above-mentioned input voltage being provided to above-mentioned output system.
12. charging circuit self-detection method according to claim 10, which is characterized in that further include:
When above-mentioned charging circuit interruption means operates in above-mentioned normal mode and receives above-mentioned electric leakage signal, forbidding will be above-mentioned
Input voltage is provided to above-mentioned output system；And
It, persistently will be upper when above-mentioned charging circuit interruption means operates in above-mentioned normal mode and do not receive above-mentioned electric leakage signal
It states input voltage and is provided to above-mentioned output system.
13. charging circuit self-detection method according to claim 10, which is characterized in that further include:
It detects the above-mentioned input voltage of above-mentioned first input power cord and above-mentioned second input power cord and sends above-mentioned voltage
Signal；
Judge that above-mentioned electric system is just providing above-mentioned input voltage according to above-mentioned voltage signal, exports above-mentioned detection enable signal；
Judge that above-mentioned input voltage is located at one of a first voltage range and a second voltage range according to above-mentioned voltage signal
Person；
When above-mentioned input voltage is when above-mentioned first voltage range, self above-mentioned detection device is operated in into above-mentioned first mode；
And
When above-mentioned input voltage is when above-mentioned second voltage range, self above-mentioned detection device is operated in into above-mentioned second mode.
14. charging circuit self-detection method according to claim 13, which is characterized in that self above-mentioned detection device packet
It includes:
One first resistor is coupled between above-mentioned first node and one first internal node；
Above-mentioned first internal node is coupled to one second inside according to above-mentioned detection enable signal and saved by one first detection switch
Point；
One second resistance is coupled between above-mentioned second internal node and above-mentioned second node；And
Above-mentioned second internal node is coupled to above-mentioned second node according to above-mentioned status signal by one second detection switch.
15. charging circuit self-detection method according to claim 14, which is characterized in that further include:
It, will be inside above-mentioned first using above-mentioned first detection switch when self above-mentioned detection device operates in above-mentioned first mode
Node is coupled to above-mentioned second internal node, and using above-mentioned second detection switch is coupled to above-mentioned second internal node above-mentioned
Second node；
It, will be in above-mentioned first using above-mentioned first detection switch when self above-mentioned detection device is operated in above-mentioned second mode
Portion's node is coupled to above-mentioned second internal node, and is not turned on above-mentioned second detection switch, wherein in above-mentioned first mode and
In above-mentioned second mode, self above-mentioned detection device generates identical above-mentioned test electric current；And
When above-mentioned charging circuit interruption means operates in above-mentioned normal mode, it is not turned on above-mentioned first detection switch and above-mentioned
Second detection switch.
16. charging circuit self-detection method according to claim 14, which is characterized in that above-mentioned first detection switch with
And above-mentioned second detection switch is respectively an optocoupler components.
17. charging circuit self-detection method according to claim 12, which is characterized in that further include:
When above-mentioned charging circuit interruption means operates in self above-mentioned detection pattern and judges that above-mentioned earth leakage detection functions are normal,
Generate a first switch signal and a second switch signal；
According to above-mentioned first switch signal and above-mentioned second switch signal, above-mentioned input voltage is provided to above-mentioned output system
System；
When above-mentioned charging circuit interruption means operates in self above-mentioned detection pattern and judges the failure of above-mentioned earth leakage detection functions,
Generate above-mentioned first switch signal and above-mentioned second switch signal；And
Using above-mentioned first switch signal and above-mentioned second switch signal, forbid above-mentioned input voltage being provided to above-mentioned output
System.
18. charging circuit self-detection method according to claim 17, which is characterized in that further include:
When above-mentioned charging circuit interruption means operates in above-mentioned normal mode and receives above-mentioned electric leakage signal, above-mentioned the is generated
One switching signal and above-mentioned second switch signal；
According to above-mentioned first switch signal, forbid above-mentioned input voltage being provided to above-mentioned output system；
When above-mentioned charging circuit interruption means operates in above-mentioned normal mode and do not receive above-mentioned electric leakage signal, generate above-mentioned
First switch signal and above-mentioned second switch signal；And
According to above-mentioned first switch signal and above-mentioned second switch signal, continue above-mentioned input voltage being provided to above-mentioned output
System.
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| CN101682203A (en) * | 2007-06-15 | 2010-03-24 | 丰田自动车株式会社 | Charging device and charging system |
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| US8907678B2 (en) * | 2010-12-10 | 2014-12-09 | Raritan Americas, Inc. | Methods and apparatus for sensing ground leakage and automated self testing thereof |
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| CN101682203A (en) * | 2007-06-15 | 2010-03-24 | 丰田自动车株式会社 | Charging device and charging system |
| CN101755371A (en) * | 2007-07-24 | 2010-06-23 | 松下电工株式会社 | Charge monitoring device |
| CN102074979A (en) * | 2009-11-20 | 2011-05-25 | 松下电工株式会社 | Feed control device |
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