CN208797826U - A kind of short-circuit protection of external load - Google Patents
A kind of short-circuit protection of external load Download PDFInfo
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- CN208797826U CN208797826U CN201821360872.9U CN201821360872U CN208797826U CN 208797826 U CN208797826 U CN 208797826U CN 201821360872 U CN201821360872 U CN 201821360872U CN 208797826 U CN208797826 U CN 208797826U
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- external load
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Abstract
The utility model discloses a kind of short-circuit protections of external load; including servo-driver and external load; the servo-driver includes Switching Power Supply, thermistor R, input and output terminal V, No.1 GND and PF; the external load includes input and output terminal V+, No. two GND and Output; the servo-driver is mounted on servo-driver by input and output terminal V, No.1 GND and PF connection corresponding with the input and output terminal V+ of external load, No. two GND and Output, the Switching Power Supply and thermistor R insertion.The utility model is when external load overloads or is short-circuit; its ptc characteristics of PPTC thermistor R; resistance increases rapidly, reduces to reach output electric current, and then protection power source; after troubleshooting; PPTC thermistor is cooling quickly and is restored to original low resistance state, and circuit restores to work normally again, and the utility model circuit has structure simple; using feature convenient and practical, at low cost, the stability of system is improved.
Description
Technical field
The utility model relates to field of circuit technology more particularly to a kind of short-circuit protections of external load.
Background technique
In the application of industrial servo-driver, driving needs to connect various feedback loads, in the feelings that various application environments are indefinite
Under condition, load has overload or short-circuit conditions occur, and driver needs to detect its loading condition.Existing technology is worked as
When load overload or short circuit, driver switch power supply is protected, but will affect the stability of whole system, driver switch electricity
Source may be damaged or driver will appear hiccup and restart.In addition it is negative also to have connect internal drive for Switching Power Supply 15V power supply
Carry, cannot judge when external load overload is perhaps short-circuit driver switch power supply be internal or external loading overload or
Short circuit is not easy to where the fault point of judgement system.Driver practical application is influenced, the maintenance of driver is more troublesome.
Utility model content
Purpose of the utility model is to solve the problems of the prior art, and a kind of short circuit of the external load proposed
Protection.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of short-circuit protection of external load, including servo-driver and external load, the servo-driver include opening
Powered-down source, thermistor R, input and output terminal V, No.1 GND and PF, the external load include input and output terminal V+, two
Number GND and Output, the servo-driver pass through the input and output of input and output terminal V, No.1 GND and PF and external load
Terminal V+, No. two corresponding connections of GND and Output, the Switching Power Supply and thermistor R insertion are mounted on servo-driver
On, and the output end of thermistor R is connected with the input terminal of Switching Power Supply.
Preferably, when the temperature is excessively high, resistance increases rapidly by the model PPTC of the thermistor R, thermistor R, heat
After quick resistance R is cooling, restore low resistance state.
Compared with prior art, the utility model provides a kind of short-circuit protection of external load, has following beneficial to effect
Fruit:
Using the protection circuit, when driver external load overload or short circuit, which can be protected rapidly,
Driver switch power supply work normally and it is not damaged, after external load Failure elimination, circuit restores normally again, in this way can
Where quickly judging fault point, serially added at internal drive Switching Power Supply output external load into a PPTC one by one in this circuit
Thermistor, when internal drive power overload situation or short circuit when, Switching Power Supply is protected, when external load overload or it is short
Lu Shi, thermistor resistance value increase, and limitation output reaches protective effect, and driving power keeps working normally at this time, when outside is negative
After carrying overload or short trouble removing, thermistor restores normal condition again, in practical applications, is convenient for judging failure in this way
Point is safeguarded convenient for driver.
It is not directed to part in the device to be the same as those in the prior art or can be realized by using the prior art, the utility model
Structure is simple, easy to operate.
Detailed description of the invention
Fig. 1 be the utility model proposes a kind of external load short-circuit protection structural schematic diagram；
Fig. 2 be the utility model proposes a kind of external load short-circuit protection servo-driver cross-sectional view；
Fig. 3 be the utility model proposes a kind of external load short-circuit protection external load cross-sectional view.
In figure: 1, servo-driver；2, external load；3, Switching Power Supply；4, thermistor R；5, input and output terminal
15V；6, No.1 GND；7,PF；8, input and output terminal V+；9, No. two GND；10,Output.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "top", "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
Embodiment 1
As shown in Figure 1-3, a kind of short-circuit protection of external load, including servo-driver 1 and external load 2, it is described to watch
Taking driver 1 includes Switching Power Supply 3, thermistor R4, input and output terminal 15V5, No.1 GND6 and PF7, the external load
2 include input and output terminal V+8, No. two GND9 and Output10, the servo-driver 1 by input and output terminal 15V5,
No.1 GND6 and PF7 connection corresponding with the input and output terminal V+8 of external load 2, No. two GND9 and Output10, it is described to open
Powered-down source 3 and thermistor R4 insertion are mounted on servo-driver 1, and the output end of thermistor R4 and Switching Power Supply 3
Input terminal is connected；When the temperature is excessively high, resistance increases rapidly by the model PPTC of the thermistor R4, thermistor R4, heat
After quick resistance R4 is cooling, restore low resistance state.
The principles of the present invention: it is gone here and there at 1 internal switch power supply 3 of servo-driver output external load 2 in this circuit
A PPTC thermistor R4 one by one is added, when 1 internal electric source of servo-driver overload or short circuit, Switching Power Supply 3 is protected
Shield, when the overload of external load 2 or short circuit, its ptc characteristics of PPTC thermistor R4, resistance is increased rapidly, thus
Reach output electric current to reduce, and then protection power source, after troubleshooting, PPTC thermistor R4 is cooling quickly and is restored to
Low resistance state originally, circuit restore to work normally again, in practical applications, in this way convenient for judging fault point, convenient for driving
Device maintenance.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (2)
1. a kind of short-circuit protection of external load, including servo-driver (1) and external load (2), which is characterized in that described to watch
Taking driver (1) includes Switching Power Supply (3), thermistor R (4), input and output terminal 15V (5), No.1 GND (6) and PF (7),
The external load (2) includes input and output terminal V+ (8), No. two GND (9) and Output (10), the servo-driver (1)
Pass through input and output terminal 15V (5), No.1 GND (6) and PF (7) and the input and output terminal V+ (8) of external load (2), No. two
GND (9) and Output (10) corresponding connection, the Switching Power Supply (3) and thermistor R (4) insertion are mounted on servo-drive
On device (1), and the output end of thermistor R (4) is connected with the input terminal of Switching Power Supply (3).
2. a kind of short-circuit protection of external load according to claim 1, which is characterized in that the thermistor R (4)
When the temperature is excessively high, resistance increases rapidly by model PPTC, thermistor R (4), after thermistor R (4) is cooling, restores low resistance
State.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821360872.9U CN208797826U (en) | 2018-08-23 | 2018-08-23 | A kind of short-circuit protection of external load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821360872.9U CN208797826U (en) | 2018-08-23 | 2018-08-23 | A kind of short-circuit protection of external load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208797826U true CN208797826U (en) | 2019-04-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821360872.9U Active CN208797826U (en) | 2018-08-23 | 2018-08-23 | A kind of short-circuit protection of external load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208797826U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988623A (en) * | 2018-08-23 | 2018-12-11 | 深圳市弘粤驱动有限公司 | A kind of short-circuit protection of external load |
-
2018
- 2018-08-23 CN CN201821360872.9U patent/CN208797826U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988623A (en) * | 2018-08-23 | 2018-12-11 | 深圳市弘粤驱动有限公司 | A kind of short-circuit protection of external load |
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