CN104578041B - Power supplying device - Google Patents
Power supplying device Download PDFInfo
- Publication number
- CN104578041B CN104578041B CN201410008834.7A CN201410008834A CN104578041B CN 104578041 B CN104578041 B CN 104578041B CN 201410008834 A CN201410008834 A CN 201410008834A CN 104578041 B CN104578041 B CN 104578041B
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- Prior art keywords
- current
- slip
- value
- power supplier
- output
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Direct Current Feeding And Distribution (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a power supplying device. When micro sliding abrasion occurs between the power supplying device and a joint of a connector connected to a load device, the micro sliding abrasion can be reliably detected. Due to the micro sliding abrasion, sliding current of output current (Iout) flowing through an output power line will occurs repeatedly within the period of 1msec. Thus, sliding current is detected from the output current (Iout), where current value changes in a period less than maximum 1msec. In the monitoring period after the sliding current is firstly detected, current values of the sliding current can be accumulated whenever the sliding current is detected. When sliding accumulation values accumulated in the monitoring period exceeds a monitoring threshold, it is determined that the micro sliding abrasion occurs. In this way, abnormal connection caused by the micro sliding abrasion between the power supplying device and the connector connected to the load device can be detected from the side of the power supplying device.
Description
Technical field
The present invention relates to power supplier, its connector through being connected with a pair of out-put supply line is to load device supply
The dc source of galvanic current pressure, further specifically, is related to monitor connecing in connector from power supplier side
The power supplier of micro- skimming wear that point produces.
Background technology
Power supplier is a device that the dc source to AC power or unstable DC voltage carries out electricity
Force transformation, and supply to load device as the dc source of stable predetermined output voltage, this power supplier is used
Charger and ac adapter in mancarried electronic aids such as portable phone, portable music players.
Fig. 5 is to represent in conventional power supplier, never galvanic current pressure direct-current input power supplying to a pair
One of the dc-dc converter 100 of insulation flyback type supplying the dc source of stable output voltage between out-put supply line is shown
The figure (patent document 1) of example, in figure, 11a is the HV Terminal of unstable direct-current input power supplying 11, and 11b is low-voltage terminal,
2a, 2b are the armature winding of transformer 2 and two grades of output windings.
Intermittent oscillation element 36 is connected in series with respect to the armature winding 2a of direct-current input power supplying 11 and transformer 2, generally,
The continuous action in the way of certain frequency is to be opened and closed between armature winding 2a and low-voltage terminal 11b of this intermittent oscillation element 36,
During making the control signal of stopping that constant current flows be imported into control terminal 36a, intermittent oscillation element 36 is cutting off just
Stop in the state of between level winding 2a and low-voltage terminal 11b.39 are and the photoelectric coupling being arranged at two grades of outlet sides described later
Device light-emitting component 35 carries out the photoelectrical coupler photo detector of photoelectric coupling, and this photoelectrical coupler photo detector 39 is connected to interval
Between the control terminal 36a of oscillating element 36 and the low-voltage terminal 11b of direct-current input power supplying 11.
It is provided with two grades of sides (outlet side) of transformer 2 and constitute rectification diode 4 peace that rectification smooths circuit
Sliding capacitor 13, to carry out rectification smoothing to the output of two grades of output winding 2b, and exports a pair of i.e. height of out-put supply line
Between pressure side out-put supply line 20a and low-pressure side out-put supply line 20b.High-pressure side out-put supply line 20a in a pair and low pressure
Side out-put supply line 20b is through connector 5 respectively with a pair of internal power cord 10a, 10b in load device 10 internal wiring even
Connect, thus supplying, to load device 10, the dc source producing between out-put supply line 20a, 20b.
It is provided between a pair of out-put supply line 20a, 20b and be made up of current monitoring circuit 40 and voltage monitoring circuit 41
Output monitoring circuit, described current monitoring circuit 40 and voltage monitoring circuit 41 are to the output voltage of dc source and output electricity
Stream is monitored, and so that one party is exceeded and be set as predetermined value in variation of consumption electric power due to load device 10 side etc.
Setting voltage or during setting electric current, so that the photoelectrical coupler light-emitting component 35 of in figure is lighted.
The frequency of on-off action of described intermittent oscillation element 36 and dutycycle (on duty) were set in the continuous work phase
Between make between high-pressure side out-put supply line 20a and low-pressure side out-put supply line 20b produce output power and output current slowly
Rise.Consumption electricity in the load device 10 being connected between high-pressure side out-put supply line 20a and low-pressure side out-put supply line 20b
Power changes, or is short-circuited between load device 10 interior power line, and output current exceedes setting electric current and extremely rises
In the case of, based on the current detecting being connected in series with the low-pressure side out-put supply line 20b output current formation of resistance 43
Voltage drop increases, thus, the voltage being input to the reversed input terminal of error amplifier 33b of current monitoring circuit 40 rises,
Inverted amplification with the potential difference of the 2nd comparison voltage of current surveillance reference power supply 34b, become exceed photoelectrical coupler light
The current potential of the lasing threshold of element 35.
In addition, when the output voltage between high-pressure side out-put supply line 20a and low-pressure side out-put supply line 20b exceedes setting
During voltage, in reversed input terminal the, divider resistance 30,31 of the error amplifier 33a being input to voltage monitoring circuit 41
Between the current potential of tap (tap) 32 also rise, anti-with the potential difference of the 1st comparison voltage of reference power supply 34a with voltage monitoring
Relay big, become the current potential of the lasing threshold exceeding photoelectrical coupler light-emitting component 35.
So, when some of output voltage or output current exceedes setting voltage or setting electric current, exceeding
Period, photoelectrical coupler light-emitting component 35 continues to light, and the restriction signal representing more than these values is continuously exported to photoelectricity
Coupler photo detector 39.
During photoelectrical coupler photo detector 39 carries out light to restriction signal, due to the control from intermittent oscillation element 36
Terminal 36a processed flows continuously through constant current to the low-voltage terminal 11b of direct-current input power supplying 11, is therefore connected for control signal of stopping
It is input to the state of control terminal 36a, thus the on-off action of intermittent oscillation element 36 stops continuously.Its result is to cut off
The electric current flowing through in the armature winding 2a of transformer 3, the magnetization energy being accumulated in two grades of output winding 2b of transformer 3 is born
Carry and put 10 slow consumptions, exceeded setting voltage or the output voltage of setting electric current or output current reduces, and be in
Below setting voltage or setting electric current, thus, carry out protecting load device 10 and power supplier 100 to avoid abnormal voltage
Constant voltage and current constant control with abnormal current.
Prior art literature
Patent document 1: No. 3391774 publications of Japanese Patent No.
The described connector 5 connecting between power supplier 100 and load device 10 is connected by male and female mode
One group of connector plug and connector body constitute, for example, make the male contact of connector plug and power supplier 100 side
Out-put supply line 20a, 20b connect, make the female contact of connector body and internal power cord 10a, 10b of load device 10 side
Connect, so that connector plug is connected with connector body, make male contact and female contacts, so that internal power cord
10a, 10b are electrically connected with out-put supply line 20a, 20b respectively.
In addition, disclosing following content: in the contact site of this female contact and male contacts, even if connector plug with
During connector body is connected, also can there is the corrosion process of such contact site: connector plug is inserted with connector
Seat repeats micro- skimming wear (fretting corrosion, the friction of micro- slip each other with several μm to tens of μm of width
Corrosion).Micro- skimming wear has the feature persistently repeating, when persistently repeating micro- skimming wear, in the movement of contact site surface
The set of metallic occurs oxidation to become the residuals harder than the material of contact and between contact, and this makes contact
Contact surface be in the killing state of easy oxidation, finally form oxide-film in contact surface, thus leading to the loose contact of contact.
In the state of the loose contact creating contact, the impedance of contact site becomes unstable, from power supplier
100 change to the output current of the dc source flowing through between contact, thus abnormality of contact section heating.Especially since making
The smoothing capacity device 13 of output voltage smoothing employs jumbo capacitor, is therefore for example controlled with the rated current of 1a
The output current of system due to the contact site in connector 5 discontinuously become 5a about and flow through contact site, different due to contact site
Often generate heat and create the carbonization accident of contact or the danger that fire occurs.
Dress is supplied from the output current of power supplier 100 output sometimes in power supply due to this micro- skimming wear
Put the setting electric current area below change carrying out current constant control in 100, even having the conventional electricity of constant-current control unit
Source feedway 100, also cannot detect the generation of micro- skimming wear.
In addition, even if the output current that micro- skimming wear leads to exceedes the setting electric current of current constant control, its cycle is to the maximum
Hundreds of μ sec, very short, and the response speed of significantly shorter than current monitoring circuit 40 and intermittent oscillation element 36, therefore, make defeated
The current constant control going out electric current reduction does not work.On the other hand, in addition to there is micro- skimming wear, it is being connected to load device 10
When or load device 10 the variation of consumption electric power when, output current exceedes the shape of setting electric current with the cycle of hundreds of below μ sec
State also can take place frequently, therefore, nor the generation being judged to micro- skimming wear according to predicting of this state immediately.
Although the danger that micro- like this skimming wear leads to is predicted, cannot be in the power supply supply of supply dc source
Device 100 side carries out detection prevention to above-mentioned danger, therefore, with the connection of the load device requiring high security in, even
Connect in device built-in temperature fuse to prevent abnormal heating accident.But, usually, electric connection of power supply feedway 100 with
In the connector 5 of load device 10, due to cost increase and maximization, therefore do not carry out such consideration, abnormal heating accident
The danger occurring still does not avoid.Content of the invention
The invention that the present invention allows for such conventional problem points and completes, its object is to provide a kind of power supply to supply
To device, when there occurs micro- skimming wear between the contact of the connector being connected in load device, can reliably detect
Go out this micro- skimming wear.
In addition, the purpose of the present invention is for providing a kind of power supplier, by the simple knot of not built-in temperature fuse
The connector of structure reliably to prevent the abnormal heating accident of connector.
In order to complete described purpose, the power supplier described in first aspect has power output part, this power supply
Output section from alternating current input power supplying or direct-current input power supplying between a pair of out-put supply line output galvanic current pressure straight
Stream power supply, the described power supplier connector through being connected with a pair of out-put supply line to load device supply dc source,
Described power supplier is characterised by having: current detecting unit, its be used for detection flow through in out-put supply line defeated
Go out electric current iout；Slip current detecting unit, it is used for detecting that current value is set as 1msec with maximum from output current iout
The slide deciding cycle below the slip electric current that is changed of cycle；Cumulative unit, it is from the inspection of slip current detecting unit
Interior during measuring the predetermined supervision starting during slip electric current, whenever detecting slip electric current, the current value of this slip electric current is entered
Row accumulation；And anomaly monitoring unit, at least exceeded by the slip accumulated value that cumulative unit accumulation obtains when interior during monitoring
During predetermined monitoring threshold, described anomaly monitoring unit is judged to that the connection of connector is abnormal.
By betide connector contact site micro- skimming wear and show as output current iout slip electric current tool
There is such feature: current value was changed with the cycle of below 1msec, the slip that current value similarly changes during certain
Electric current repeats, therefore, it is possible to current value is set as the mechanical periodicity in the slide deciding cycle of 1msec below with maximum
Output current iout is estimated as slip electric current and detects.Further, since only during there occurs micro- skimming wear, this slip
Electric current is detected repeatedly out, so slip accumulated value sis as obtained from slip current accumulation its current value is supervises certain
Continue to increase depending in period.Therefore, anomaly monitoring unit exceedes predetermined monitoring threshold according to slip accumulated value interior during monitoring
And other that can be changed with the current value of output current will be come because of identification, thus being judged to that micro- skimming wear is led temporarily
The connection of the connector causing is abnormal.
In addition, the power supplier described in second aspect is characterised by, described power supplier also has: permanent
Flow control part, output current iout flowing through in a pair of out-put supply line is controlled to constant rated current by it, and slide electricity
Stream detector unit detects, from output current iout, the slip electric current that current value changes below rated current.
Even the slip electric current being changed with not controlled by current constant control portion, the current value below rated current,
Also can be detected by slip current detecting unit.
In addition, the power supplier described in the third aspect is characterised by, described power supplier also has: deposits
Storage unit, it is interior during monitoring to store to the current value of this slip electric current whenever detecting slip electric current, works as slip
When accumulated value exceedes predetermined monitoring threshold, during monitoring, the current value of the interior slip electric current being stored by memory cell is to reduce
During gesture, anomaly monitoring unit is judged to that the connection of connector is abnormal.
When continuous, contact site the abrasion development of micro- skimming wear, the impedance at the contact site of connector slowly rises, sliding
The current value of streaming current is in reduction trend.Therefore, the electricity of the interior slip electric current being stored by memory cell during by monitoring
Flow valuve is that the situation of reduction trend is added in the decision condition connecting exception of connector, and anomaly monitoring unit can be more accurate
Detect the generation of micro- skimming wear.
In addition, the power supplier described in fourth aspect is characterised by, described power supplier also has: alert
Accuse display unit, when the connection that anomaly monitoring unit is judged to connector is abnormal, show connection by alerting display unit
The connection of device is abnormal.
Connector can be passed on to there occurs that connection is abnormal to user by visual observation.
In addition, the power supplier described in the 5th aspect is characterised by, described power supplier also has: protects
Protection circuit, it has the cut-out circuit of cut-out out-put supply line, when the connection that anomaly monitoring unit is judged to connector is abnormal,
Cut off out-put supply line by cutting off circuit.
Cut off out-put supply line when the connection that anomaly monitoring unit is judged to connector is abnormal, so that in the connectors
The output current flowing through stops.
In addition, the power supplier described in the 6th aspect is characterised by, described power supplier also has: sliding
Dynamic counter, it counts to the quantity of the slip electric current detecting interior during monitoring；And peak value holding unit, it is right
During monitoring, the maximum current value of the interior current value of slip electric current detecting is stored, and anomaly monitoring unit is being judged to
After the connection exception of connector, according to the elapsed time exceeding predetermined monitoring threshold to slip accumulated value, sliding counts
In the count value of device, the maximum current value of peak value holding unit storage, the parameter of 1 or more than 2, to judge protection act
Emergency.
When the caloric value being judged in the unit interval that the contact site connecting abnormal connector occurs increases, pass through
Slip accumulated value after unit interval also increases, therefore, elapsed time to slip accumulated value exceedes predetermined monitoring threshold
Become the standard of the caloric value within the unit interval that the contact site of connector occurs.
Further, since when the slip number of times of micro- skimming wear increases, the count value of slip counter increases, so counting
Value becomes the standard of the development speed of the corrosion process of the contact site of connector.
In addition, when flowing through the High Output Current having heating dangerous in the connector being judged to connect exception, maximum electricity
Flow valuve represents high current value, and therefore, maximum current value becomes the standard of the danger of the heating of the contact site of connector.
Therefore, the counting according to the elapsed time exceeding predetermined monitoring threshold to slip accumulated value, slip counter
The parameter of 1 or more than 2 in value, maximum current value, can estimate danger and the development speed of abnormal heating, can
Judge the emergency of protection act.
In addition, the power supplier described in the 7th aspect is characterised by, described power supplier also has: protects
Protection circuit, its output control that there is the cut-out circuit of cut-out out-put supply line and make the output power of power output part reduce
Circuit, the emergency of the protection act that protection circuit determines according to anomaly monitoring unit is optionally making cut-out circuit and defeated
Go out some work in control circuit, cut off out-put supply line or so that output power is reduced.
According to the emergency of protection act, select the cut-out of output current and the reduction of output power.
Invention effect
According to the invention of first aspect, due to can detect, in power supplier side, the connection being connected with load device
Connection that micro- skimming wear of device leads to is abnormal, and the carbonization of contact or abnormal heating therefore, it is possible to prevent connector in advance lead to
Accident.
In addition, it is not necessary that in connector built-in temperature fuse being connected with load device etc., the company of standard can be used
Connect device.
According to the invention of second aspect, even having the constant-current control unit that output current is controlled to rated current
Power supplier, unrelated with current constant control, it is capable of detecting when the slip electric current producing due to micro- skimming wear, be prevented from
The abnormal heating accident of connector.
According to the invention of the third aspect, can more accurately detect that the connection of connector is abnormal, be prevented from abnormal sending out
Hot accident.
According to the invention of fourth aspect, make due to the connection of connector can be conveyed to from power supplier side extremely
User, so user can carry out changing the countermeasures such as connector to prevent heating accident in advance.
According to the invention of the 5th aspect, when the connection being judged to connector is abnormal, due to stopping flowing through in the connectors
Output current, therefore, it is possible to prevent abnormal heating accident in advance.
According to the invention of the 6th aspect, due to having understood the abnormal heating being judged to the contact site connecting abnormal connector
Danger and development speed, it is possible to judging the emergency of corresponding protection act.
According to the invention of the 7th aspect, due to can be according to the cut-out of the urgent Sexual behavior mode output current of protection act and defeated
Go out the reduction of electric power, therefore in the case of not urgent, connector can be made while to load device supply dc source
Contact site caloric value lower.
Brief description
Fig. 1 is the power supplier 1 representing the one embodiment of the present invention being connected through connector 5 with load device 10
Outline circuit diagram.
Fig. 2 is the block diagram in the protection circuit portion 6 representing power supplier 1.
Fig. 3 is the leading portion flow chart of the action representing protection circuit portion 6.
Fig. 4 is the backend flow figure of the action representing protection circuit portion 6.
Fig. 5 is the circuit diagram of the outline representing conventional power supplier 100 and connector 5.
Symbol description
1 dc-dc converter (power supplier)
5 connectors
6 protection circuit portions (protection circuit)
7 anomaly monitoring portions
7b output control terminal (output control circuit)
9 display parts (warning display unit)
10 load devices
A pair of internal power cord of 10a, 10b
11 direct-current input power supplyings
15 roof-cut resistence elements (cut-out circuit)
16 slip current detecting parts (current detecting unit, slip current detecting unit)
17 peak value maintaining parts (peak value holding unit)
18 slip amperometry portions (memory cell)
19 monitor control unit (cumulative unit, anomaly monitoring unit)
20a high-pressure side out-put supply line (out-put supply line)
20b low-pressure side out-put supply line (out-put supply line)
40 current monitoring circuits (current constant control portion)
Specific embodiment
Hereinafter, with reference to Fig. 1, the power supplier 1 of one embodiment of the present invention is illustrated.Present embodiment
Power supplier 1 is identical with conventional flyback type dc-dc converter 100 basic structures shown in Fig. 5, this power supplier
1 is newly to arrange obtained from protection circuit portion 6 in this dc-dc converter 100, and this protection circuit portion 6 is different to the connection of connector 5
Often detected and carried out for protecting the response of load device 10 to process.Therefore, supply to the conventional power supply shown in Fig. 5
The public circuit of device 100 and component mark same symbol, and description is omitted.
In the present embodiment, such power supplier 1 is illustrated: be built in the commercial alternating current with 100v
Source connects and is in charger that portable telephone be charged through connector 5 to load device 10 with the rated output of 5v, 1a.
Therefore, in figure, 11a and 11b is the shakiness that the commercial alternating current pressure to 100v carries out that voltage obtained from rectification is possible to change
The HV Terminal of fixed dc source and low-voltage terminal, the DC input voitage between high pressure side terminal 11a and low-voltage terminal 11b
For 141v.2a is the armature winding of transformer 2, and 2b is two grades of output windings, armature winding 2a and the switch element 3 of transformer 2
It is connected in series with respect to direct-current input power supplying 11.
Switch element 3 is made up of insulated-gate type n-channel mosfet, by from drive control circuit 8 to control terminal 3a being
Grid input is set as the frequency of predetermined on-off action and the switching signal of dutycycle, between the Drain-Source of this switch element 3
It is opened and closed control, so that the failure of current flowing through in the armature winding 2a of transformer 2 and circulation.
Drive control circuit 8 is connected with photoelectrical coupler photo detector 39, and photoelectrical coupler photo detector 39 is same to be arranged at
Photoelectrical coupler light-emitting component 35 photoelectric coupling of two grades of sides of transformer 2, in photoelectrical coupler photo detector 39 to light thermocouple
During the light that clutch light-emitting component 35 sends carries out light, drive control circuit 8 makes dutycycle reduce to control terminal 3a output
Switching signal.Thus, it is 1a that output current iout flowing through in out-put supply line 20a, 20b exceedes output-current rating
Setting electric current, or the output voltage between out-put supply line 20a, 20b exceedes the setting voltage that rated output voltage is 5v
In the case of, current monitoring circuit 40 or voltage monitoring circuit 41 are reacted and photoelectrical coupler light-emitting component 35 are lighted
Control, carry out current constant control or Isobarically Control, above-mentioned action is identical with described conventional power supplier 100, therefore, province
Slightly its explanation.
The high-pressure side out-put supply line 20a that the two ends of two grades of output winding 2b of transformer 2 are connected with same load device 10
Connect with low-pressure side out-put supply line 20b, the output producing in two grades of output winding 2b is rectified smoothing circuit rectifies and smooths
Change, and be output between high-pressure side out-put supply line 20a and low-pressure side out-put supply line 20b as dc source, described whole
Stream smoothing circuit exports winding 2b by the rectification being connected in series with high-pressure side out-put supply line 20a with diode 4 with two grades
The smoothing capacity device 13 being connected in parallel is constituted.
As shown in figure 1, high-pressure side out-put supply line 20a and low-pressure side out-put supply line 20b through connector 5 respectively with load
Internal power cord 10a, 10b electrical connection of device 10, described connector 5 is inserted by one group of connector being connected in male and female mode
Head and connector body are constituted.That is, each hero contact and the high-pressure side out-put supply of the connector plug of power supplier 1 side are made
The terminal of line 20a and low-pressure side out-put supply line 20b connects, make each female contact of connector body of load device 10 side with interior
The terminal of portion power line 10a, 10b connects, and makes the connector plug of power supplier 1 side and the connector of load device 10 side
Socket is connected, and makes corresponding hero contact and female contacts make high-pressure side out-put supply line 20a and low-pressure side output electricity
Source line 20b is connected with internal power cord 10a, 10b respectively, thus supplying direct current from power supplier 1 to load device 10
Source.
Protection circuit portion 6 is made up of following part: shunting (shunt) resistance 14 and roof-cut resistence element 15, and its series connection is even
It is connected between low-pressure side out-put supply line 20b；Anomaly monitoring portion 7, it is configured at high-pressure side out-put supply line 20a and shunt resistance 14
The low-pressure side out-put supply line 20b of low-pressure side between, by by the low-pressure side of shunt resistance 14 is set to the straight of earthing potential
The microcomputer flowing power supply and working is constituted；And display part 9, it is carried out display control by anomaly monitoring portion 7.
As shown in Fig. 2 anomaly monitoring portion 7 is made up of following part: slip current detecting part 16, it is from exporting in low-pressure side
Output current iout flowing through in power line 20b detects slip electric current；Peak value maintaining part 17；Slip amperometry portion 18；With
And monitoring control unit 19, it is controlled to the action in each portion 16,17,18 in anomaly monitoring portion 7, and slip electric current is examined
The current value is of each slip electric current that survey portion 16 detects is added up to, with total slip accumulated value sis obtaining as base
Plinth is abnormal come the connection to judge connector 5.
In addition, slip current detecting part 16 is such structure: input is connected with the high-pressure side of shunt resistance 14, will be
Output current iout flowing through in low-pressure side out-put supply line 20b is transformed to the voltage detecting at shunt resistance 14 two ends out,
After output current iout calculating in anomaly monitoring portion 7 and the current value is of slip electric current etc. are actually transformed to voltage
Value, but illustrate as current value for convenience's sake.
Slip current detecting part 16 from because there is micro- skimming wear and output current iout that changes, by current value with maximum
Be set as 1msec(millisecond) the slide deciding cycle below output current iout of cyclical swing be estimated as slip electric current and examine
Measure.Here, so-called slip electric current is because the contact site between the contact of connector 5 occurs micro- skimming wear
(fretting corrosion) and lead to the electric current that output current iout is changed with the cycle of tens of to hundreds of μ sec,
Due to micro- skimming wear continuously certain period, therefore slip electric current is continuously expressed as output current iout during certain.
Therefore, by being more than at least 10 μ sec and the cycle of maximum 1msec by slide deciding cycle set, it is capable of detecting when 10 to number
The slip electric current in the cycle of hundred μ sec, and can exceed and low-pressure side out-put supply line 20b weight from power supplier 1 removing
The noise in the folded cycle in slide deciding cycle.
In the present embodiment, slide deciding cycle set is 1msec, by so that output current iout passes through 1khz
The output that the cycle of below the 1msec of high-pass filter changes is set as slip electric current.By like this using making slip
The high-pass filter that output current iout of the frequency more than inverse in judgement cycle is passed through is additionally it is possible to detect with current constant control
The rated current of 1a below the slip electric current that changes of current value.
Slip current detecting part 16, whenever detect the slip electric current of described condition from output current iout, this is slided
The current value is of electric current exports to monitoring control unit 19, peak value maintaining part 17 and export to slip electric current through peak value maintaining part 17
Analysis portion 18.Wherein, when monitoring that control unit 19 initially detects the slip electric current of described condition from output current iout, make to set
Supervision timer during determining into predetermined supervision starts to start.Be configured to during supervision continuously certain during while enough to examine
Measure the sufficiently long time that micro- skimming wear of repetition reduces, here, being that portable telephone is fully charged to load device 10 is
Charging interval only is 3 hours, is set as one hour, so as to detecting micro- cunning within a charging interval during monitoring
Dynamic abrasion.
The current value of peak value maintaining part 17 slip electric current that middle basis inputs from slip current detecting part 16 during monitoring
Is gradually to update its maximum current value and to be stored.
Slip amperometry portion 18 has slip counter, so that slip is counted whenever inputting the current value is of slip electric current
Device counts to be increased, and the amount detection of the slip electric current that slip current detecting part 16 middle during monitoring detects is counted.
In addition, the current value is of all slip electric currents of middle input is associated with timestamp and is once stored during monitoring, and
And whether middle current value is is that reduction trend detects during to monitoring.
Supervision control unit 19 whenever inputting the current value is of slip electric current to its current value from slip current detecting part 16
Is is added up to, to monitoring during in the summation of current value is that inputted be that slip accumulated value sis accumulates.When the phase of supervision
Between in slip accumulated value sis when exceeding the monitoring threshold being set as predetermined value, to supervision at that time during in elapsed time
Once stored, and inputted testing result current value is being reduced to trend from slip amperometry portion 18.
Slip accumulated value sis in during monitoring exceedes the monitoring threshold being set as predetermined value, and the electricity of slip electric current
In the case that flow valuve is is reduction trend, monitor that control unit 19 is judged to there occurs, in connector 5, the company that micro- skimming wear leads to
Connect exception.That is, during the contact site in connector 5 there occurs micro- skimming wear, because slip electric current repeatedly shows as exporting
Electric current iout, therefore slip accumulated value sis as obtained from slip electric current is accumulated to its current value is continue to increase,
During supervision, interior slip accumulated value exceedes predetermined monitoring threshold, therefore, it is possible to change with the current value of output current temporarily
Other to come because of identification, and be judged to the connector 5 that micro- skimming wear leads to connection abnormal.In addition, when micro- mill that slides
When damaging continuous, contact site abrasion development, the impedance rise at the contact site of connector, the current value is of slip electric current is to reduce
Trend, therefore, by being added to abnormal the sentencing of connection of connector 5 by the situation that the current value is of slip electric current is reduction trend
In fixed condition, can more accurately detect the generation of micro- skimming wear.
Therefore, monitoring threshold is set to such value: during than monitoring interior accumulation temporarily due to other will thus produce
The slide deciding cycle below the noise in cycle accumulated value obtained from each current value big, and at least there is micro- slip in ratio
In the case of abrasion during monitoring in the slip accumulated value of each current value is of slip electric current that is continuously present little.In this reality
Apply in mode, when occur micro- skimming wear when it is assumed that during the supervision of a hour the middle cycle be 100 μ sec about slip electricity
Stream occurs in that at least 100 times, and the current value is of each slip electric current is the current value near the rated current of 1a, therefore, will monitor
Threshold value is set as 100a time.
Monitor that control unit 19 has the display control terminal 7a being connected with display part 9, so that in the company being judged to connector 5
When connecing abnormal, will there occurs that connecting abnormal information conveys to user.Display part 9 is by the shell being arranged on power supplier 1
The display elements such as the led of body are constituted, when monitoring that control unit 19 is judged to that the connection of connector 5 is abnormal, from supervision control unit 19
Display control terminal 7a export to pass on to user and connect the display control signals such as abnormal flicker.
In addition, monitoring that control unit 19 has: output control terminal 7b, its low-pressure side with photoelectrical coupler light-emitting component 35
Connect；And cutting-off controlling terminal 7c, it is connected with the grid of the roof-cut resistence element 15 being made up of insulated-gate type n-channel mosfet
Connect, when the connection being judged to connector 5 is abnormal, necessary protection act to be carried out according to its emergency.
With regard to the emergency of protection act, in monitoring control unit 19, using ginseng more than any one of following a, b, c
Count and to be judged:
A. the elapsed time in during the supervision once storing when slip accumulated value sis exceedes monitoring threshold,
B. in slip amperometry portion 18 the slip electric current that slip counter is counted amount detection,
C. the maximum current value of the current value is of slip electric current of peak value maintaining part 17 storage.
Due to the frequency of slip accumulated value sis and slip electric current and the current value is of slip electric current increase and decrease accordingly
Increase and decrease, therefore slip accumulated value sis becomes the caloric value of unit interval produced by the contact site of connector 5 of Corrosion developing
Standard, the elapsed time to exceeding monitoring threshold of a. is shorter, and the emergency of protection act is higher.
In addition, the corrosion process of the contact site of connector 5 is aggravated when the slip number of times of micro- skimming wear increases, therefore,
The amount detection of slip electric current b. becomes the standard of the development speed of corrosion process, and the development of the bigger corrosion of amount detection is more
Hurry up, the emergency of protection act is higher.
In addition, the caloric value meeting when the contact site flowing of the connector 5 that the slip electric current of high current value is aggravates to corrosion
Increase, therefore, the maximum current value of the current value is of c. becomes the standard of the heating danger of contact site, and maximum current value is got over
Height, the emergency of protection act is higher.
In the present embodiment, for each parameter of a.b.c., carry out certain weighting to carry out grade distinguishing, work as supervision
When control unit 19 is judged to that the connection of connector 5 is abnormal, obtain met which grade by each parameter, judge whether it is comprehensively one
Determine more than a reference value, judge that the emergency of protection act is high or low, but, the value of each parameter is quantized, and it is urgent to carry out
The method not limited to this of the judgement of property.
When being judged to that emergency is high, from cutting-off controlling terminal 7c output, control is turned off to roof-cut resistence element 15
Control signal, cutoff low side out-put supply line 20b immediately, thus stop exporting dc source to load device 10.
In addition, when being judged to that emergency is low, from output control terminal 7b to the low pressure of photoelectrical coupler light-emitting component 35
Side output exceed photoelectrical coupler light-emitting component 35 lasing threshold light control signal.Thus, photoelectrical coupler is lighted
The photoelectrical coupler photo detector 39 that the light that element 35 sends carries out light makes dutycycle reduce to control terminal 3a output
Switching signal, the electric power resulting from two grades of output winding 2b two ends of transformer 2 reduces, thus, in high-pressure side out-put supply line
Output current iout flowing through in 20a and low-pressure side out-put supply line 20b reduces.Control signal will be lighted from supervision control unit 19
Exporting longer, output current iout is lower, therefore, even if being judged to that emergency is low, monitoring that control unit 19 also can be according to guarantor
The necessity of shield action to be adjusted to lighting control signal, can meticulously carry out the reduction control of output current iout in pole
System.
By the flow chart of Fig. 3 and Fig. 4 come to the action in protection circuit portion 6 of power supplier 1 that constitutes carry out
Explanation.Cunning after startup power supply feedway 1, to the supervision timer of supervision control unit 19, slip amperometry portion 18
Dynamic counter, it is stored in the current value is of all slip electric currents in slip amperometry portion 18, is stored in peak value maintaining part 17
Maximum current value, be stored in monitor control unit 19 slip accumulated value sis resetted, anomaly monitoring portion 7 is initially set
Fixed (step s1 s3).
Next, in slip current detecting part 16, to the output current flowing through in low-pressure side out-put supply line 20b
Iout measures (step s4), if current value in output current iout carried out with the cycle below the slide deciding cycle
Output current iout changing, then as slip current detecting out (step s5), as long as do not detect slip electric current, just
Continue to output the measurement (step s4 s5) of electric current iout.
When detecting slip electric current, differentiate whether be stored with maximum current value (peak hold value) in peak value maintaining part 17
(step s6), when initially detecting slip electric current, because maximum current value is reset without being stored, so make supervision control
The supervision timer in portion 19 processed starts to start (step s7), perform detection go out to slide electric current when step s8 to the one of step s11
The process of consecutive.That is, in peak value maintaining part 17, the current value is of the slip detecting electric current is carried out as maximum current value
Peak value keeps (step s8), and the count value making slip counter in slip amperometry portion 18 is 1(step s9), and by electricity
Flow valuve is is associated with timestamp and is stored (step s10), makes from slip current detecting part 16 in monitoring control unit 19
The current value is of input is slip accumulated value sis(step s11).
Then, in supervision control unit 19, slip accumulated value sis is compared (step s12) with accumulation threshold, but
Initially detect the moment of slip electric current, because slip accumulated value sis is below accumulation threshold, so to determine whether monitor
Step s13 in period is advanced, similarly, due in the moment initially detecting slip electric current be monitor during interior, so returning
Return to step s4, again from output current iout to there being fricton-tight electric current to be detected (step s4 s5).
When detecting new slip electric current, store maximum current value due in peak value maintaining part 17, so from
Step s6 proceeds to directly to step s8 to s11, perform detection go out to slide electric current when a series of process.Detect slip newly
During electric current, it is compared with the maximum current value being stored in peak value maintaining part 17, when the current value of the slip electric current newly detecting
When is is big, this current value is is replaced into maximum current value (step s8), so that slip is counted increases (step s9), and detects to new
The current value is of the slip electric current going out is associated with timestamp and to carry out adding storage, and calculates including being stored before this
The overall variation rate (step s10) of current value is, current value is is added with slip accumulated value sis and replaces slip accumulated value
Sis(step s11).
Interior during supervision, if be unsatisfactory for slip accumulated value sis be more than accumulation threshold, in slip amperometry portion 18
The decision condition of the step for current value is of storage is in reduction trend s12, just repeats the above, even across supervision
When period does not meet the decision condition of step s12 yet, it is judged to that up to the present detected slip electric current is due to micro-
The reason beyond skimming wear and the noise that produces, return to the initial setting (step s13) from s1, make supervision timer multiple
Position, repeats the detection action of new slip electric current.
On the other hand, interior during monitoring, it is more than accumulation threshold and in slip amperometry in slip accumulated value sis
When the current value is of storage is in reduction trend in portion 18, it is judged to create the connection exception that micro- skimming wear leads to, monitors
Control unit 19 obtains elapsed time slip accumulated value sis exceedes monitoring threshold, the amount detection of slip electric current, slip
The maximum current value of electric current belongs to which grade in each parameter of a to c, the summation according to its grade come judge protect urgent
Property (step s14).
When the summation of grade exceedes certain a reference value, it is judged to emergency height (step s15), from display control terminal
7a output makes display part 9 carry out the display control signal of flickering display, thus pass on to user connecting extremely, and from cut-out
Control terminal 7c output turns off the control signal of control to roof-cut resistence element 15, thus the electricity of cutoff low side output immediately
Source line 20b, then returnes to the initial setting (step s16) from step s1.
When the summation of grade is unsatisfactory for certain a reference value, it is judged as emergency low (step s15), from display control end
The display control signal that sub- 7a output makes display part 9 carry out flickering display, thus pass on to user connect extremely, and from defeated
Go out control terminal 7b output make photoelectrical coupler light-emitting component 35 light light control signal, so that output current iout subtracts
Little, then, connect abnormal process to monitor, return to the initial setting (step s16) from step s1, repeat new cunning
The detection action of streaming current.
In the above-described embodiment, by slip amperometry portion 18, during monitoring, the current value is of memory storage is in and subtracts
The situation of little trend is added in the condition connecting exception being judged to connector 5, but can also be interior during monitoring, only logical
Cross slip accumulated value sis and be in this condition of more than accumulation threshold, and be judged to the connection of connector 5 extremely.In addition, will be in prison
Reduction trend depending on the current value is of the slip electric current detecting in period is estimated as the abnormal impedance leading to of connection of connecting portion
Rise, but interior during being not limited to monitor, can subtracting according to output current iout being detected in the longer elapsed time
Little trend is abnormal come the connection to judge connecting portion.
In addition, in the action in the protection circuit portion 6 of described power supplier 1, terminating to load device 10
Charge and stop to load device 10 output dc source when, even at monitor during in, be also carried out reset (from step s1
The initialization rising), but detect in during monitoring during the stopping of output current iout or, once examine upper
Before measuring output current iout, stop supervision timer, the meter to the maximum current value of peak value maintaining part 17, slip counter
Numerical value, the current value is being stored in slip amperometry portion 18, slip accumulated value sis are once stored, not to load dress
During putting 10 output dc sources, the action in protection circuit portion 6 is made to stop.
In addition, be built in charger and through connector 5 to load device 10 supply dc source dc-dc converter,
Power supplier 1 is illustrated, but as long as the contact between by the contact of connector is come to load device supply
The power supplier of dc source or be built in through usb hub etc. to other load devices supply dc source
Equipment in device.
Industrial utilization possibility
The present invention is applied to the power supplier supplying dc source through connector to load device.
Claims (7)
1. a kind of power supplier, it has power output part, and this power output part is defeated from alternating current input power supplying or direct current
Enter power supply to the dc source exporting galvanic current pressure between a pair of out-put supply line, described power supplier through with a pair
The connector that out-put supply line connects supplies dc source to load device,
Described power supplier is characterised by, described power supplier has:
Current detecting unit, it is used for the output current (iout) that detection is flow through in out-put supply line；
Slip current detecting unit, it is used for detecting that current value is set as the cunning of 1msec with maximum from output current (iout)
The slip electric current that cycle below the dynamic judgement cycle is changed；
Cumulative unit, it is interior during detecting, from slip current detecting unit, the predetermined supervision starting during slip electric current, whenever
Detect and during slip electric current, the current value of this slip electric current is accumulated；And
Anomaly monitoring unit, at least exceedes predetermined prison when interior during monitoring by the slip accumulated value that cumulative unit accumulation obtains
During visual threshold value, described anomaly monitoring unit is judged to that the connection of described connector is abnormal.
2. power supplier according to claim 1 it is characterised in that
Described power supplier also has: current constant control portion, its output current that will flow through in a pair of out-put supply line
(iout) it is controlled to constant rated current,
Slip current detecting unit detects, from output current (iout), the slip electric current that current value changes below rated current.
3. power supplier according to claim 1 and 2 it is characterised in that
Described power supplier also has: memory cell, its during monitoring interior whenever detecting slip electric current to this cunning
The current value of streaming current is stored,
When slip accumulated value exceedes predetermined monitoring threshold, the electric current of the interior slip electric current being stored by memory cell during monitoring
When value is reduction trend, anomaly monitoring unit is judged to that the connection of described connector is abnormal.
4. power supplier according to claim 1 and 2 it is characterised in that
Described power supplier also has: warning display unit,
When the connection that anomaly monitoring unit is judged to described connector is abnormal, show described connection by alerting display unit
The connection of device is abnormal.
5. power supplier according to claim 1 and 2 it is characterised in that
Described power supplier also has: protection circuit, and it has the cut-out circuit of cut-out out-put supply line,
When the connection that anomaly monitoring unit is judged to described connector is abnormal, cut off out-put supply line by cutting off circuit.
6. power supplier according to claim 1 and 2 it is characterised in that
Described power supplier also has:
Slip counter, it counts to the quantity of the slip electric current detecting interior during monitoring；And
Peak value holding unit, the maximum current value of its current value to the slip electric current detecting interior during monitoring is deposited
Storage,
Anomaly monitoring unit, after the connection exception being judged to described connector, exceedes predetermined supervision according to slip accumulated value
1 or 2 in the maximum current value that elapsed time till threshold value, the count value of slip counter, peak value holding unit store
Individual above parameter, to judge the emergency of protection act.
7. power supplier according to claim 6 it is characterised in that
Described power supplier also has: protection circuit, and it has the cut-out circuit of cut-out out-put supply line and makes power supply defeated
Go out the output control circuit that the output power in portion reduces,
The emergency of the protection act that protection circuit determines according to anomaly monitoring unit is optionally making cut-out circuit and defeated
Go out some work in control circuit, cut off out-put supply line or so that output power is reduced.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-220116 | 2013-10-23 | ||
| JP2013220116A JP5594419B1 (en) | 2013-10-23 | 2013-10-23 | Power supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104578041A CN104578041A (en) | 2015-04-29 |
| CN104578041B true CN104578041B (en) | 2017-01-18 |
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ID=51702080
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410008834.7A Expired - Fee Related CN104578041B (en) | 2013-10-23 | 2014-01-08 | Power supplying device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5594419B1 (en) |
| CN (1) | CN104578041B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10256733B2 (en) * | 2015-09-30 | 2019-04-09 | Apple Inc. | Tapped winding flyback converter for multiple output voltages |
| CN110915116B (en) * | 2017-06-14 | 2023-11-10 | 超旸半导体(上海)有限公司 | Voltage Regulator with Time-Aware Current Reporting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1712268A (en) * | 2004-06-25 | 2005-12-28 | 丰田自动车株式会社 | Power supply apparatus capable of detecting abnormality in current flowing in drive circuit |
-
2013
- 2013-10-23 JP JP2013220116A patent/JP5594419B1/en not_active Expired - Fee Related
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2014
- 2014-01-08 CN CN201410008834.7A patent/CN104578041B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1712268A (en) * | 2004-06-25 | 2005-12-28 | 丰田自动车株式会社 | Power supply apparatus capable of detecting abnormality in current flowing in drive circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015082913A (en) | 2015-04-27 |
| JP5594419B1 (en) | 2014-09-24 |
| CN104578041A (en) | 2015-04-29 |
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