CN206892210U - Detection power supply adaptor and charger bear the device of surge current size - Google Patents
Detection power supply adaptor and charger bear the device of surge current size Download PDFInfo
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- CN206892210U CN206892210U CN201720474016.5U CN201720474016U CN206892210U CN 206892210 U CN206892210 U CN 206892210U CN 201720474016 U CN201720474016 U CN 201720474016U CN 206892210 U CN206892210 U CN 206892210U
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- surge current
- charger
- electric capacity
- resistance
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Abstract
A kind of simple in construction, cost is low and the detection power supply adaptor and charger of good test effect bear the device of surge current size.It includes measurement jig box, is fitted into surge current generator and the oscillograph for being connected to measured device voltage input end, are provided with switch SW1, switch SW2, switch SW3, the input interface and oscillograph connection terminal of measured device on the shell of measurement jig box.Its output valve by setting dimmable AC mains, the high storage capacitor in surge current generator is set to store the electric charge of different capabilities, the energy stored by high storage capacitor is simulated by surge current to measured device abrupt release by multiple switch again, with reference to working condition of the measured device under corresponding simulation surge current, the surge current limiting value that measured device can be born is known.It need to use the cans such as simple capacitance resistance ware, bridge heap, fuse to make, and can accurately test low-power power adapter and the resistance to current characteristics of charger.
Description
Technical field
A kind of surge current generator circuit is the utility model is related to, be particularly suitable for use in low-power power adapter and charging
The detection of device Antisurge current.
Background technology
How the electronic product such as charger and adapter in use, certain surge current can be produced, determines in firm start
The power supplys such as charger can bear how many amperes of surge current, be to develop the problem of power supply product needs to consider.Existing wave
Current feedback circuit is gushed, it is necessary to using devices such as single-chip microcomputer, timer, display screen, discharge tubes, and its is complicated, costly.
Utility model content
The technical problems to be solved in the utility model is to provide that a kind of simple in construction, cost is low and the detection of good test effect
Power supply adaptor and charger bear the device of surge current size.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：
Detection power supply adaptor and charger of the present utility model bear the device of surge current size, including measurement jig
Box, the surge current generator being fitted into and the oscillograph for being connected to measured device voltage input end, in measurement jig box
Shell is provided with switch SW1, switch SW2, switch SW3, the input interface and oscillograph connection terminal of measured device, its
In,
Switch SW1 is connected between the input of civil power or dimmable AC mains and the surge current generator；
Switch SW2 is single-pole double-throw switch (SPDT), and it can be switched on or switched off surge current generator rectification output to high energy storage electricity
The charging of appearance, or the high storage capacitor can be switched on or switched off and discharged over the ground by discharge resistance；
Switch SW3 is connected between the current input terminal of measured device and the high storage capacitor.
The surge current generator is made up of rectifier bridge, discharge resistance and high storage capacitor, wherein,
The input of rectifier bridge is terminated at described switch SW1, and it exports the charge control end for being terminated at switch SW2；
One end of the discharge resistance is connected to switch SW2 discharge control terminal, its other end ground connection；
The high storage capacitor is electrochemical capacitor, and its positive pole is connected to switch SW2 common port, its negative pole ground connection.
The discharge resistance is made up of resistance R1, resistance R2, resistance R3 and resistance R4 parallel connections；The high storage capacitor is by electricity
Hold C1, electric capacity C2 and electric capacity C3 composition in parallel.
The thermistor for eliminating input peak voltage is additionally provided between the rectifier bridge and switch SW1.
The electric capacity C1, electric capacity C2 and electric capacity C3 are the pressure-resistant electrochemical capacitor more than 400V.
The electric capacity C1, electric capacity C2 and electric capacity C3 model 450V 470uF electrochemical capacitor.
Device of the present utility model includes dimmable AC mains, surge test tool, oscillograph and surge current generator.It is logical
The output valve that dimmable AC mains are set is crossed, the high storage capacitor in surge current generator is stored the electric charge of different capabilities, then
Energy stored by high storage capacitor is simulated by surge current to measured device abrupt release by multiple switch, with reference to tested device
Working condition of the part under corresponding simulation surge current, knows the surge current limiting value that measured device can be born.This practicality
New structure is simple, and cost is relatively low, need to only use the cans such as simple capacitance resistance ware, bridge heap, fuse to make.And it can
Accurate test low-power power adapter and the resistance to current characteristics of charger, the design to power supply product provide worth of data branch
Hold.
Brief description of the drawings
Fig. 1 is device to test block diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of the surge current generator in the utility model.
Fig. 3 is test result figure.
Embodiment
As shown in Figure 1, 2, detection power supply adaptor and charger of the present utility model bear the device of surge current size
By measurement jig box, surge current generator and for showing that (also referred to as tested power supply, it includes small-power power and fitted measured device
Orchestration and charger) can bear waveform corresponding to much surge currents oscillograph form.
The shell of the measurement jig box is made by fireproof bakelite material, and its overall volume is rectangle, in its shell
Manually operated switch SW1, switch SW2, switch SW3, the input interface of measured device and the oscillograph is provided with to connect
Connecting terminal.
Switch SW1 one end is connected to civil power or dimmable AC mains (the exportable 90V-264V of dimmable AC mains exchange
Voltage), the other end is connected to the input of the surge current generator.
Switch SW2 is single-pole double-throw switch (SPDT), and it can be switched on or switched off surge current generator rectification output to high energy storage electricity
The charging of appearance, or the high storage capacitor can be switched on or switched off and discharged over the ground by discharge resistance.
Switch SW3 is connected between the current input terminal of measured device and the high storage capacitor.
The surge current generator is made up of rectifier bridge, discharge resistance and high storage capacitor, wherein, the input of rectifier bridge
The described switch SW1 other ends are terminated at, it exports the charge control end for being terminated at switch SW2.
The discharge resistance is made up of resistance R1, resistance R2, resistance R3 and resistance R4 parallel connections, a termination of the discharge resistance
In switch SW2 discharge control terminal, its other end ground connection.
The high storage capacitor is made up of pressure-resistant three electrochemical capacitor parallel connections more than 400V, and three electrochemical capacitors are respectively
Electric capacity C1, electric capacity C2 and electric capacity C3, the positive pole of the high storage capacitor are connected to switch SW2 common port, its negative pole ground connection.
Device operation principle of the present utility model is as follows：
Exchange inputs to switch SW1 first, and exchange input can be civil power, or described dimmable AC mains, facilitates pair
Voltage is adjusted, and switchs the break-make of SW1 control input voltages, and when F1 fuses prevent internal circuit exception, fuse disconnects,
AC input is disconnected, and whole circuit can be played a protective role.
NTC1 thermistors, when inputting moment, thermistor can remove certain peak voltage, can protect rectification
Bridge and back-end circuit.
BD1 bridge heaps, by ac voltage rectifier it is direct current by full-bridge rectification for carrying out rectification to input ac voltage
Pressure.
SW2 is switched, works as AC input, when switch SW1 disconnects and switch SW2 connects discharge control terminal, due to electrochemical capacitor still
A large amount of electric charges are stored, if released not in time, are on the one hand possible to the personal safety of entail dangers to test user, on the other hand meeting
Influence measuring accuracy.
, can be in time by electric charge consumption on described discharge resistance when switching SW2 by being connected to discharge control terminal, electric discharge
The size of resistance directly affects the speed of discharge time, while the power of resistance should select to close according to the size of output capacitance
Suitable power, if too small, resistance heating is serious.
When switch SW2 is connected to charge control end, and it is that alternating current is after over commutation to described when closing to switch SW1
High storage capacitor charging, the length in charging interval are determined by its capacity.
Consider in the range of input 90V-264V, DC voltage after rectification>300V, it is proposed that electric capacity C1, electric capacity C2 and electric capacity C3
Pressure voltage size 400V high-voltage electrolytic capacitor.
Switch SW3 is output switch, and closure is in when switch SW1 closures, switch SW2 connect charge control end and switch SW3
During state, make the high storage capacitor to measured device discharging surge current, while oscillograph will show input to tested power supply
The current waveform of input.Change the big of the surge current of high storage capacitor release by adjusting the input voltage value of AC power supplies
Working condition corresponding to small and measured device, the characteristic of the resistance to surge current of measured device can be easily detected, with this, is
The resistance to surge current design of measured device provides accurate numerical basis.
After the completion of test, switch SW1 is disconnected, switch SW2 is connect into discharge control terminal, switch SW3 disconnected, the connection can
So that unnecessary electric charge to be consumed by discharge resistance, in case next time is used again.
As shown in figure 3, being 5V1A charger surge current test result figures, inrush current value 23.9A is new using this practicality
Type method, between being connected on tested power supply and measurement jig box using oscilloscope current probe, very simple and clear obtains a result.
Claims (6)
1. a kind of device for detecting power supply adaptor and charger and bearing surge current size, including measurement jig box, it is installed
In surge current generator and be connected to the oscillograph of measured device voltage input end, it is characterised in that：In measurement jig box
Shell be provided with switch SW1, switch SW2, switch SW3, the input interface and oscillograph connection terminal of measured device, its
In,
Switch SW1 is connected between the input of civil power or dimmable AC mains and the surge current generator；
Switch SW2 is single-pole double-throw switch (SPDT), and it can be switched on or switched off surge current generator rectification output to high storage capacitor
Charging, or the high storage capacitor can be switched on or switched off and discharged over the ground by discharge resistance；
Switch SW3 is connected between the current input terminal of measured device and the high storage capacitor.
2. detection power supply adaptor according to claim 1 and charger bear the device of surge current size, its feature
It is：The surge current generator is made up of rectifier bridge, discharge resistance and high storage capacitor, wherein,
The input of rectifier bridge is terminated at described switch SW1, and it exports the charge control end for being terminated at switch SW2；
One end of the discharge resistance is connected to switch SW2 discharge control terminal, its other end ground connection；
The high storage capacitor is electrochemical capacitor, and its positive pole is connected to switch SW2 common port, its negative pole ground connection.
3. detection power supply adaptor according to claim 2 and charger bear the device of surge current size, its feature
It is：The discharge resistance is made up of resistance R1, resistance R2, resistance R3 and resistance R4 parallel connections；The high storage capacitor is by electric capacity
C1, electric capacity C2 and electric capacity C3 compositions in parallel.
4. detection power supply adaptor according to claim 2 and charger bear the device of surge current size, its feature
It is：The thermistor for eliminating input peak voltage is additionally provided between the rectifier bridge and switch SW1.
5. detection power supply adaptor according to claim 3 and charger bear the device of surge current size, its feature
It is：The electric capacity C1, electric capacity C2 and electric capacity C3 are the pressure-resistant electrochemical capacitor more than 400V.
6. detection power supply adaptor according to claim 5 and charger bear the device of surge current size, its feature
It is：The electric capacity C1, electric capacity C2 and electric capacity C3 model 450V 470uF electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720474016.5U CN206892210U (en) | 2017-04-28 | 2017-04-28 | Detection power supply adaptor and charger bear the device of surge current size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720474016.5U CN206892210U (en) | 2017-04-28 | 2017-04-28 | Detection power supply adaptor and charger bear the device of surge current size |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206892210U true CN206892210U (en) | 2018-01-16 |
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ID=61341263
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720474016.5U Active CN206892210U (en) | 2017-04-28 | 2017-04-28 | Detection power supply adaptor and charger bear the device of surge current size |
Country Status (1)
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| CN (1) | CN206892210U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988736A (en) * | 2019-12-10 | 2020-04-10 | 天津瑞能电气有限公司 | Short circuit test tool |
| CN113985087A (en) * | 2021-10-22 | 2022-01-28 | 宁波公牛电器有限公司 | Switch fusion welding simulation circuit and control method and system thereof |
| CN116466208A (en) * | 2023-05-19 | 2023-07-21 | 擎湾科技(无锡)有限公司 | Microsecond-level pulse forward surge current testing system |
-
2017
- 2017-04-28 CN CN201720474016.5U patent/CN206892210U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988736A (en) * | 2019-12-10 | 2020-04-10 | 天津瑞能电气有限公司 | Short circuit test tool |
| CN113985087A (en) * | 2021-10-22 | 2022-01-28 | 宁波公牛电器有限公司 | Switch fusion welding simulation circuit and control method and system thereof |
| CN113985087B (en) * | 2021-10-22 | 2023-11-03 | 宁波公牛电器有限公司 | Switch fusion welding simulation circuit and control method and system thereof |
| CN116466208A (en) * | 2023-05-19 | 2023-07-21 | 擎湾科技(无锡)有限公司 | Microsecond-level pulse forward surge current testing system |
| CN116466208B (en) * | 2023-05-19 | 2023-10-31 | 擎湾科技(无锡)有限公司 | Microsecond-level pulse forward surge current testing system |
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