CN108988623A - A kind of short-circuit protection of external load - Google Patents
A kind of short-circuit protection of external load Download PDFInfo
- Publication number
- CN108988623A CN108988623A CN201810964274.0A CN201810964274A CN108988623A CN 108988623 A CN108988623 A CN 108988623A CN 201810964274 A CN201810964274 A CN 201810964274A CN 108988623 A CN108988623 A CN 108988623A
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- China
- Prior art keywords
- external load
- thermistor
- driver
- input
- gnd
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention 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 present invention 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 circuit of the present invention has structure simple; using feature convenient and practical, at low cost, the stability of system is improved.
Description
Technical field
The present invention 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.
Summary of the invention
The purpose of the present invention is to solve the problems of the prior art, and a kind of short circuit of the external load proposed is protected
Shield.
To achieve the goals above, present invention employs following technical solutions:
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 present invention provides a kind of short-circuit protection of external load, have it is following the utility model has the advantages that
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, structure of the invention
Simply, easy to operate.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the short-circuit protection of external load proposed by the present invention；
Fig. 2 is a kind of servo-driver cross-sectional view of the short-circuit protection of external load proposed by the present invention；
Fig. 3 is a kind of external load cross-sectional view of the short-circuit protection of external load proposed by the present invention.
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
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the 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 principle of the present invention: in this circuit 1 internal switch power supply 3 of servo-driver output external load 2 at serially add into
A PPTC thermistor R4 one by one, when 1 internal electric source of servo-driver overload or short circuit, Switching Power Supply 3 is protected, when
When the overload of external load 2 or short circuit, its ptc characteristics of PPTC thermistor R4, resistance is increased rapidly, to reach
It exports electric current to reduce, and then protection power source, after troubleshooting, PPTC thermistor R4 is cooling quickly and is restored to original
Low resistance state, circuit restores to work normally again, in practical applications, in this way convenient for judge fault point, convenient for driver dimension
Shield.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
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 |
|---|---|---|---|
| CN201810964274.0A CN108988623A (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 |
|---|---|---|---|
| CN201810964274.0A CN108988623A (en) | 2018-08-23 | 2018-08-23 | A kind of short-circuit protection of external load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108988623A true CN108988623A (en) | 2018-12-11 |
Family
ID=64547943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810964274.0A Pending CN108988623A (en) | 2018-08-23 | 2018-08-23 | A kind of short-circuit protection of external load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108988623A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296946A (en) * | 2013-01-02 | 2013-09-11 | 六安先锋电机有限公司 | Driver of brushless electric machine and circuit thereof |
| CN203368004U (en) * | 2013-06-21 | 2013-12-25 | 深圳Tcl新技术有限公司 | Power supply protection circuit and switch power supply |
| CN203645299U (en) * | 2013-12-31 | 2014-06-11 | 昌辉汽车转向***（黄山）有限公司 | Hardware overload or short circuit protective circuit and DC power supply circuit |
| CN203967744U (en) * | 2014-07-02 | 2014-11-26 | 邯郸美的制冷设备有限公司 | Overvoltage protection and air conditioner for air conditioner |
| CN105099237A (en) * | 2015-06-29 | 2015-11-25 | 广东食品药品职业学院 | Medical switching power supply for achieving short-circuit protection and leakage prevention |
| CN208797826U (en) * | 2018-08-23 | 2019-04-26 | 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 CN201810964274.0A patent/CN108988623A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296946A (en) * | 2013-01-02 | 2013-09-11 | 六安先锋电机有限公司 | Driver of brushless electric machine and circuit thereof |
| CN203368004U (en) * | 2013-06-21 | 2013-12-25 | 深圳Tcl新技术有限公司 | Power supply protection circuit and switch power supply |
| CN203645299U (en) * | 2013-12-31 | 2014-06-11 | 昌辉汽车转向***（黄山）有限公司 | Hardware overload or short circuit protective circuit and DC power supply circuit |
| CN203967744U (en) * | 2014-07-02 | 2014-11-26 | 邯郸美的制冷设备有限公司 | Overvoltage protection and air conditioner for air conditioner |
| CN105099237A (en) * | 2015-06-29 | 2015-11-25 | 广东食品药品职业学院 | Medical switching power supply for achieving short-circuit protection and leakage prevention |
| CN208797826U (en) * | 2018-08-23 | 2019-04-26 | 深圳市弘粤驱动有限公司 | A kind of short-circuit protection of external load |
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