CN109713887A - A kind of Switching Power Supply and its output circuit - Google Patents
A kind of Switching Power Supply and its output circuit Download PDFInfo
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- CN109713887A CN109713887A CN201910150467.7A CN201910150467A CN109713887A CN 109713887 A CN109713887 A CN 109713887A CN 201910150467 A CN201910150467 A CN 201910150467A CN 109713887 A CN109713887 A CN 109713887A
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- power supply
- switching power
- fictitious load
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Abstract
This application discloses a kind of output circuit of Switching Power Supply, output circuit includes fictitious load branch；The first end of fictitious load branch and the output end of Switching Power Supply connect, the second end ground connection of fictitious load branch；Fictitious load branch includes concatenated fictitious load and controllable switch；Controllable switch is disconnected when Switching Power Supply starts, and is closed when Switching Power Supply is closed.The application utilizes and the concatenated controllable switch of fictitious load, fictitious load is accessed to output circuit when Switching Power Supply is closed and is disconnected in Switching Power Supply starting with output circuit, to both effectively utilize velocity of discharge when fictitious load accelerates Switching Power Supply closing, also the efficiency after the starting of effective guarantee Switching Power Supply will not reduce, to improve the economic benefit and competitiveness of product.Disclosed herein as well is a kind of Switching Power Supplies, equally have above-mentioned beneficial effect.
Description
Technical field
This application involves switch power technology field, in particular to a kind of Switching Power Supply and its output circuit.
Background technique
Switching Power Supply is the common power-supply device in modern electronic technology field.In the output circuit of Switching Power Supply, one
As be that stable voltage is exported using capacitor.But if voltage of the Switching Power Supply when closed on capacitor does not reduce
To 0, then it will lead to system exception, therefore, will use " fictitious load " in parallel with capacitor generally in the industry to accelerate the velocity of discharge.
Why fictitious load is referred to as fictitious load, is because it is not the load of user really.The introducing of fictitious load will necessarily
Increase additional power consumption, the efficiency of Switching Power Supply after actuation is caused to reduce.In consideration of it, providing a kind of solution above-mentioned technical problem
Scheme, have become those skilled in the art need concern.
Summary of the invention
The application's is designed to provide a kind of Switching Power Supply and its output circuit, to efficiently solve drawing for fictitious load
The problem of entering to reduce the working efficiency after Switching Power Supply starts.
In order to solve the above technical problems, in a first aspect, this application discloses a kind of output circuit of Switching Power Supply, including vacation
Load branch；The first end of the fictitious load branch is connect with the output end of the Switching Power Supply, and the of the fictitious load branch
Two ends ground connection；The fictitious load branch includes concatenated fictitious load and controllable switch；The controllable switch is in the Switching Power Supply
It disconnects when starting, and is closed when the Switching Power Supply is closed.
Optionally, the first end of the fictitious load is connect with the output end of the Switching Power Supply, and the second of the fictitious load
End is connect with the first output end of the controllable switch；The second output terminal of the controllable switch is grounded.
Optionally, the fictitious load is resistance.
Optionally, the controllable switch is relay.
Optionally, the relay is DC relay.
Optionally, the first control terminal of the relay is connect with the output end of the Switching Power Supply, the relay
Second control terminal ground connection.
Optionally, the relay includes normally-closed contact, normally opened contact and total contact；The normally-closed contact as it is described after
First output end of electric appliance, the second output terminal of the contact as the relay altogether.
Second aspect, present invention also provides a kind of Switching Power Supplies, including the defeated of any Switching Power Supply as described above
Circuit out.
The output circuit of Switching Power Supply provided herein includes fictitious load branch；The first end of the fictitious load branch
It is connect with the output end of the Switching Power Supply, the second end ground connection of the fictitious load branch；The fictitious load branch includes series connection
Fictitious load and controllable switch；The controllable switch is disconnected when the Switching Power Supply starts, and is closed in the Switching Power Supply
When be closed.
As it can be seen that the output circuit of Switching Power Supply provided herein, using with the concatenated controllable switch of fictitious load, will be false
It is supported on access output circuit when Switching Power Supply is closed and is disconnected in Switching Power Supply starting with output circuit, thus both effectively
Ground accelerates velocity of discharge when Switching Power Supply is closed using fictitious load, and the efficiency after the starting of effective guarantee Switching Power Supply is not yet
It can reduce, to improve the economic benefit and competitiveness of product.Switching Power Supply provided herein includes above-mentioned switch electricity
The output circuit in source equally has above-mentioned beneficial effect.
Detailed description of the invention
In order to illustrate more clearly of the technical solution in the prior art and the embodiment of the present application, below will to the prior art and
Attached drawing to be used is needed to make brief introduction in the embodiment of the present application description.Certainly, in relation to the attached drawing of the embodiment of the present application below
A part of the embodiment in only the application of description is not paying creativeness to those skilled in the art
Under the premise of labour, other attached drawings can also be obtained according to the attached drawing of offer, other accompanying drawings obtained also belong to the application
Protection scope.
Fig. 1 is a kind of structural schematic diagram of the output circuit of Switching Power Supply provided herein；
Fig. 2 is a kind of circuit structure diagram of the output circuit of Switching Power Supply provided herein.
Specific embodiment
The core of the application is to provide a kind of Switching Power Supply and its output circuit, to efficiently solve drawing for fictitious load
The problem of entering to reduce Switching Power Supply starting efficiency.
In order to which technical solutions in the embodiments of the present application is more clearly and completely described, below in conjunction with this Shen
Please attached drawing in embodiment, technical solutions in the embodiments of the present application is introduced.Obviously, described embodiment is only
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Switching Power Supply is controlled output voltage size by the turn-on time of control switch pipe and stablizes output, currently,
The relevant technologies of Switching Power Supply are also more and more mature.Generally, in order to guarantee the circuit stability of Switching Power Supply, especially exist
The discharge regime of capacitor when Switching Power Supply is closed, those skilled in the art are often in the output end parallel connection of Switching Power Supply
" fictitious load " guarantees device safety and circuit stability to accelerate leakage current.However, the introducing of fictitious load can but switch
It is adversely affected after power initiation, power consumption is caused to increase, reduce the working efficiency of Switching Power Supply.
In consideration of it, the embodiment of the present application discloses a kind of output circuit of Switching Power Supply, shown referring to Fig.1, the application is real
The output circuit for applying Switching Power Supply provided by example includes fictitious load branch 1；The first end and Switching Power Supply of fictitious load branch 1
Output end connection, fictitious load branch 1 second end ground connection；Fictitious load branch 1 includes concatenated fictitious load R and controllable switch S；
Controllable switch S is disconnected when Switching Power Supply starts, and is closed when Switching Power Supply is closed.
Specifically, due to fictitious load R be mainly Switching Power Supply close when play leakage current main function, and its
Switching Power Supply can have an adverse effect instead when starting, and therefore, accelerate to let out when Switching Power Supply is closed in order to not influence fictitious load R
Discharge stream avoids fictitious load R from reducing working efficiency, output provided by the embodiment of the present application after Switching Power Supply starting again simultaneously
After specifically fictitious load R connects with controllable switch S in circuit, in the common output circuit for accessing Switching Power Supply.
Branch where fictitious load R and controllable switch S is described fictitious load branch 1.Wherein, " fictitious load " is ability
The conventional call of field technique personnel, so that really load to be used distinguishes in access circuit, user.Similarly,
Fictitious load is also divided into resistive load, inductive load, capacitive load.Preferably, the fictitious load R in the embodiment of the present application can be specific
For resistance.
As shown in Figure 1, in the output circuit of Switching Power Supply, one end and the Switching Power Supply of the capacitor of electric energy can be stored
Output end connection, other end ground connection.The first end of fictitious load branch 1 is also connect with the output end of Switching Power Supply as a result, fictitious load
The second end of branch 1 is grounded.When controllable switch S closure, fictitious load branch 1 and capacitor constitute closed circuit, capacitor
On electric energy discharge along fictitious load branch 1, using fictitious load R guarantee discharge process rapidly carry out.
Wherein, it should be noted that in fictitious load branch 1, the application does not limit fictitious load R's and controllable switch S
Mutual alignment relation, that is, both can directly be connect as shown in Figure 1 with the output end of Switching Power Supply by one end of fictitious load R, by can
One end ground connection of switch S is controlled, can also be connected, by one end of controllable switch S and the output end of Switching Power Supply by the one of fictitious load R
End ground connection.Those skilled in the art voluntarily can select and be arranged.
In addition, the application does not limit the implementation of controllable switch S equally.Those skilled in the art can be according to switch
The output parameter of power supply and the controllable switch S for choosing appropriate type, appropriate model.
When controllable switch S is disconnected, fictitious load R is also at open-circuit condition, is not linked into the output circuit of Switching Power Supply
In.Working efficiency if starting switch power supply at this time, after will not influence Switching Power Supply starting.If controllable switch S exists as a result,
It is closed when Switching Power Supply is closed, disconnected in Switching Power Supply starting, then can accelerate the velocity of discharge using fictitious load R realizing just
Purpose while, also guarantee Switching Power Supply starting after efficiency will not reduce.
The output circuit of Switching Power Supply provided herein includes fictitious load branch；The first end of fictitious load branch with open
The output end in powered-down source connects, the second end ground connection of fictitious load branch；Fictitious load branch includes concatenated fictitious load and controllably opens
It closes；Controllable switch is disconnected when Switching Power Supply starts, and is closed when Switching Power Supply is closed.
As it can be seen that the output circuit of Switching Power Supply provided herein, using with the concatenated controllable switch of fictitious load, will be false
It is supported on access output circuit when Switching Power Supply is closed and is disconnected in Switching Power Supply starting with output circuit, thus both effectively
Ground accelerates velocity of discharge when Switching Power Supply is closed using fictitious load, and the efficiency after the starting of effective guarantee Switching Power Supply is not yet
It can reduce, to improve the economic benefit and competitiveness of product.
As shown in Figure 1, the output circuit of Switching Power Supply provided herein, on the basis of the above, as one
Kind preferred embodiment, the first end of fictitious load R and the output end of Switching Power Supply connect, the second end and controllable switch S of fictitious load R
The first output end connection；The second output terminal of controllable switch S is grounded.
Wherein it is preferred to which fictitious load R is resistance.
Referring to FIG. 2, Fig. 2 is the circuit structure diagram of the output circuit of Switching Power Supply provided by the embodiment of the present application.
As shown in Fig. 2, the output circuit of Switching Power Supply provided by the embodiment of the present application, on the basis of the above,
As a kind of preferred embodiment, controllable switch S is relay.
Relay (relay) is a kind of common electric control device, it has control loop and (also known as defeated by control loop
Circuit out), it is the one kind " automatic switch " operated with Small current control high current, is usually applied to automation control circuit
In, the effects of playing automatic adjustment, safeguard protection, conversion circuit.
On the basis of the above, as a kind of preferred embodiment, Switching Power Supply provided by the embodiment of the present application
In output circuit, relay is DC relay.
As shown in Fig. 2, on the basis of the above, as a kind of preferred embodiment, provided by the embodiment of the present application
In the output circuit of Switching Power Supply, the first control terminal of relay and the output end of Switching Power Supply are connected, the second control of relay
End ground connection processed.
Specifically, due to Switching Power Supply inherently direct current output, DC relay can be used directly as controllable
Switch S is powered by the control loop that the output of Switching Power Supply is DC relay, facilitates circuit structure design.
As shown in Fig. 2, on the basis of the above, as a kind of preferred embodiment, provided by the embodiment of the present application
In the output circuit of Switching Power Supply, relay includes normally-closed contact (Normally Close, NC), normally opened contact (Normally
Open, NO) and altogether contact (Common, COM)；First output end of the normally-closed contact as relay, contact is as relay altogether
Second output terminal.
Specifically, the total contact of relay as shown in Figure 2 (i.e. situation that control loop must not be electric under general state
Under) it is to be connect with normally-closed contact, and normally opened contact is typically at open-circuit condition.And the control loop of relay is by switching
The output end of power supply is powered, and therefore, when Switching Power Supply is closed, the control loop of relay must not be electric, altogether contact, that is, ground terminal
It is connect with normally-closed contact, fictitious load R just by access output circuit, accelerates the velocity of discharge.And in Switching Power Supply starting, relay
The control loop of device obtains electric, and contact is switched to and connect with normally opened contact altogether, then fictitious load R be in open-circuit condition, ensure switch it is electric
Efficiency after the starting of source will not reduce.
Further, present invention also provides a kind of Switching Power Supplies, including any Switching Power Supply as described above
Output circuit.
The output circuit of the specific embodiment of Switching Power Supply provided herein and Switching Power Supply as described above
Reference can be corresponded to each other, is just repeated no more here.
Each embodiment is described in a progressive manner in the application, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration
?.
It should be noted that in present specification, the relational terms of such as " first " and " second " etc are used merely to
One entity or operation and another entity or operate is distinguished, without necessarily requiring or implying these entities or
There are any actual relationship or orders between person's operation.In addition, the terms "include", "comprise" or its any other
Variant is intended to non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only
It including those elements, but also including other elements that are not explicitly listed, or further include for this process, method, object
Product or the intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...",
It is not precluded in the process, method, article or apparatus that includes the element that there is also other identical elements.
Technical solution provided herein is described in detail above.Specific case used herein is to this Shen
Principle and embodiment please is expounded, the present processes that the above embodiments are only used to help understand and its
Core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the application principle
Under, can also to the application, some improvement and modification can also be carried out, these improvement and modification are also fallen into the protection scope of the application.
Claims (8)
1. a kind of output circuit of Switching Power Supply, which is characterized in that the output circuit includes fictitious load branch；The fictitious load
The first end of branch is connect with the output end of the Switching Power Supply, the second end ground connection of the fictitious load branch；The fictitious load
Branch includes concatenated fictitious load and controllable switch；The controllable switch is disconnected when the Switching Power Supply starts, and described
Switching Power Supply is closed when closing.
2. the output circuit of Switching Power Supply according to claim 1, which is characterized in that the first end of the fictitious load and institute
The output end connection of Switching Power Supply is stated, the second end of the fictitious load is connect with the first output end of the controllable switch；It is described
The second output terminal of controllable switch is grounded.
3. the output circuit of Switching Power Supply according to claim 1, which is characterized in that the fictitious load is resistance.
4. the output circuit of Switching Power Supply according to any one of claims 1 to 3, which is characterized in that the controllable switch
For relay.
5. the output circuit of Switching Power Supply according to claim 4, which is characterized in that the relay is direct current relay
Device.
6. the output circuit of Switching Power Supply according to claim 5, which is characterized in that the first control terminal of the relay
It is connect with the output end of the Switching Power Supply, the second control terminal ground connection of the relay.
7. the output circuit of Switching Power Supply according to claim 6, which is characterized in that the relay includes normally closed touching
Point, normally opened contact and total contact；First output end of the normally-closed contact as the relay, it is described to be total to described in contact conduct
The second output terminal of relay.
8. a kind of Switching Power Supply, which is characterized in that the output electricity including Switching Power Supply as described in any one of claim 1 to 7
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910150467.7A CN109713887A (en) | 2019-02-28 | 2019-02-28 | A kind of Switching Power Supply and its output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910150467.7A CN109713887A (en) | 2019-02-28 | 2019-02-28 | A kind of Switching Power Supply and its output circuit |
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| Publication Number | Publication Date |
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| CN109713887A true CN109713887A (en) | 2019-05-03 |
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| CN201910150467.7A Pending CN109713887A (en) | 2019-02-28 | 2019-02-28 | A kind of Switching Power Supply and its output circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049366A (en) * | 2019-12-05 | 2020-04-21 | 珠海格力电器股份有限公司 | Bus capacitor discharge circuit after power failure of servo driver, control method and servo driver |
| CN113442775A (en) * | 2021-07-23 | 2021-09-28 | 长春捷翼汽车零部件有限公司 | Charging and discharging control method, charging device and storage medium |
| CN113572347A (en) * | 2021-07-27 | 2021-10-29 | 捷蒽迪电子科技(上海)有限公司 | Residual voltage judgment method and system and application switch circuit |
| CN113572348A (en) * | 2021-07-27 | 2021-10-29 | 捷蒽迪电子科技(上海)有限公司 | Switch circuit with residual voltage releasing function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101073990A (en) * | 2007-06-22 | 2007-11-21 | 深圳先进技术研究院 | Power-supply system with safety protector for electric automobile and its control |
| CN101639229A (en) * | 2009-08-21 | 2010-02-03 | 东北大学 | Sustained arc high energy electrostatic igniter and control method thereof |
| CN203911743U (en) * | 2014-05-05 | 2014-10-29 | 邯郸美的制冷设备有限公司 | Electronic device and capacitor discharge circuit thereof |
| CN105915041A (en) * | 2016-07-04 | 2016-08-31 | 珠海格力电器股份有限公司 | Charge bleed-off method, bleeder circuit and converter |
| CN109039037A (en) * | 2018-06-21 | 2018-12-18 | 许继电源有限公司 | A kind of high voltage direct current filter |
-
2019
- 2019-02-28 CN CN201910150467.7A patent/CN109713887A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101073990A (en) * | 2007-06-22 | 2007-11-21 | 深圳先进技术研究院 | Power-supply system with safety protector for electric automobile and its control |
| CN101639229A (en) * | 2009-08-21 | 2010-02-03 | 东北大学 | Sustained arc high energy electrostatic igniter and control method thereof |
| CN203911743U (en) * | 2014-05-05 | 2014-10-29 | 邯郸美的制冷设备有限公司 | Electronic device and capacitor discharge circuit thereof |
| CN105915041A (en) * | 2016-07-04 | 2016-08-31 | 珠海格力电器股份有限公司 | Charge bleed-off method, bleeder circuit and converter |
| CN109039037A (en) * | 2018-06-21 | 2018-12-18 | 许继电源有限公司 | A kind of high voltage direct current filter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049366A (en) * | 2019-12-05 | 2020-04-21 | 珠海格力电器股份有限公司 | Bus capacitor discharge circuit after power failure of servo driver, control method and servo driver |
| CN113442775A (en) * | 2021-07-23 | 2021-09-28 | 长春捷翼汽车零部件有限公司 | Charging and discharging control method, charging device and storage medium |
| CN113572347A (en) * | 2021-07-27 | 2021-10-29 | 捷蒽迪电子科技(上海)有限公司 | Residual voltage judgment method and system and application switch circuit |
| CN113572348A (en) * | 2021-07-27 | 2021-10-29 | 捷蒽迪电子科技(上海)有限公司 | Switch circuit with residual voltage releasing function |
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Application publication date: 20190503 |