CN109861327A - Power-supply system power supply output port isolating device - Google Patents
Power-supply system power supply output port isolating device Download PDFInfo
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- CN109861327A CN109861327A CN201910096303.0A CN201910096303A CN109861327A CN 109861327 A CN109861327 A CN 109861327A CN 201910096303 A CN201910096303 A CN 201910096303A CN 109861327 A CN109861327 A CN 109861327A
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Abstract
The embodiment of the invention provides a kind of power-supply system power supply output port isolating devices, when the output voltage of power system mains is unsatisfactory for safety requirements, realize that in such a way that sampling resistor, voltage comparator, control module and relay combine, power system mains are isolated with output port of powering, cost needed for greatly reducing isolation.And the operating current for output port of powering is only dependent upon the operating current of relay response side, is isolated that the susceptibility that required cost change with operating current is extremely low, and the required cost of isolation will not change substantially when operating current change in several peaces.
Description
Technical field
The present embodiments relate to power supply safety technical field, more particularly, to power-supply system power supply output port every
From device.
Background technique
Currently, IEC62109 is provided in the safety of photovoltaic power supply system power conversion apparatus, the output of power-supply system is straight
Galvanic electricity power is greater than the upper limit that 60VDC is dangerous voltage, needs to be isolated by power-supply system of the standard requirements to power supply.
Under normal circumstances, solar power supply system mostly carries out charge and discharge with battery series-parallel system and realizes power supply, power supply
It is the even higher difference etc. of 12V, 24V and 48V that system can be divided into output voltage according to the difference of the series-parallel system of battery
The power-supply system of grade.And for 48V power-supply system, the output voltage theoretically worked normally may be up to 64V, this output
Voltage alreadys exceed 60V as defined in IEC62109, it will causes dangerous and injury to human body.It needs power-supply system and power supply is defeated
Exit port is isolated, to realize being isolated for power-supply system and charging equipment.
Currently, charging since customer group usually may require that using direct current USB charging interface for charging equipment.
This just needs to be converted to above-mentioned different voltages 5VDC, realizes customer demand.A kind of mode generallyd use at present is to pass through
5VDC isolated power supply module realize voltage conversion while achieve the purpose that isolation, this mode cost is quite high, and cost with
Output electric current increase can significantly rise.Another way is to generate one group of isolation supply voltage, this side using transformer
Formula is limited to the switch state and operating mode of transformer.Therefore, the power-supply system power supply for being now badly in need of providing a kind of low cost is defeated
Exit port isolating device, to solve the technical problems existing in the prior art.
Summary of the invention
In order to overcome the problems referred above or it at least is partially solved the above problem, the embodiment of the invention provides a kind of power supply systems
System power supply output port isolating device.
The embodiment of the invention provides a kind of power-supply system power supply output port isolating devices, comprising: sampling resistor, voltage
Comparator, control module and relay；
The power-supply system includes power system mains and power supply output port, and the sampling resistor accesses the power supply system
System main body, the voltage comparator, the control module and the relay are sequentially connected；
One input terminal of the voltage comparator is for inputting predetermined voltage threshold, another input of the voltage comparator
End with the sampling resistor for connect, and the voltage comparator is for measuring the voltage at the sampling resistor both ends, and by institute
The voltage for stating sampling resistor both ends is compared with the predetermined voltage threshold, if the voltage at the sampling resistor both ends is higher than institute
Predetermined voltage threshold is stated, then the voltage comparator is also used to that the control module is driven to control the relay for the power supply
System body is isolated with the power supply output port.
A kind of power-supply system provided in an embodiment of the present invention is powered output port isolating device, defeated when power system mains
When voltage is unsatisfactory for safety requirements out, in such a way that sampling resistor, voltage comparator, control module and relay combine
Realization power system mains are isolated with output port of powering, cost needed for greatly reducing isolation.And power supply output end
The operating current of mouth is only dependent upon the operating current of relay response side, and the sensitivity that required cost changes with operating current is isolated
Spend it is extremely low, when operating current changes in several peaces be isolated needed for cost will not change substantially.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of power-supply system power supply output port isolating device provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of power-supply system power supply output port isolating device provided in an embodiment of the present invention；
Fig. 3 is the structure of relay in a kind of power-supply system power supply output port isolating device provided in an embodiment of the present invention
Schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
In the description of the embodiment of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings,
It is merely for convenience of the description embodiment of the present invention and simplifies description, rather than the device or element of indication or suggestion meaning must have
There is specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to the embodiment of the present invention.In addition,
Term " first ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
As shown in Figure 1, the embodiment of the invention provides a kind of power-supply system power supply output port isolating devices, comprising: adopt
Sample resistance 1, voltage comparator 2, control module 3 and relay 4.Power-supply system 5 is including power system mains 51 and for electricity output
Port 52, sampling resistor 1 access power system mains 51, and voltage comparator 2, control module 3 and relay 4 are sequentially connected.Electricity
One input terminal of pressure comparator 2 is for inputting predetermined voltage threshold, and another input terminal of voltage comparator 2 is used for and sampling resistor
1 connection, voltage comparator 2 is used to measure the voltage at 1 both ends of sampling resistor, and by the voltage at 1 both ends of sampling resistor and presets electricity
Pressure threshold value is compared, if the voltage at 1 both ends of sampling resistor is higher than predetermined voltage threshold, voltage comparator 2 is also used to drive
Control module 3 controls relay 4 and power system mains 51 is isolated with power supply output port 52.
Specifically, the power-supply system power supply output port isolating device provided in the embodiment of the present invention, sampling resistor 1 is connect
Enter power system mains 51, and measure the voltage value at 1 both ends of sampling resistor using voltage comparator 2, will judge power-supply system master
Whether the output voltage of body is to meet the voltage of safety requirements to be equivalent to judge whether the voltage at sampling resistor both ends is more than default
Voltage threshold, this deterministic process are realized by voltage comparator 2.Then predetermined voltage threshold can be obtained by external circuit
Voltage comparator 2 is transmitted to by an input terminal of voltage comparator.When the result that voltage comparator 2 judges is sampling resistor two
When the voltage at end is greater than predetermined voltage threshold, then it can determine that the output voltage of power system mains has been unsatisfactory for safety requirements, this
When 2 drive control module 3 of voltage comparator control relay 4 by power system mains 51 with power output port 52 be isolated, with
Prevent power system mains 51 from generating for the power supply power supply of output port 52 dangerous.
It should be noted that the voltage comparator 2 provided in the embodiment of the present invention is there are two kinds of output signals, one is height
Level output signal, one is low-level output signal, both output signals are used to drive control module.This hair
The voltage that wherein certain output signal corresponds to sampling resistor both ends can be greater than predeterminated voltage threshold as needed in bright embodiment
The case where value, and by another output signal correspond to sampling resistor both ends voltage be less than or equal to predetermined voltage threshold feelings
Condition is not especially limited this in the embodiment of the present invention.
The power-supply system power supply output port isolating device provided in the embodiment of the present invention, when the output of power system mains
It is real in such a way that sampling resistor, voltage comparator, control module and relay combine when voltage is unsatisfactory for safety requirements
Existing power system mains are isolated with output port of powering, cost needed for greatly reducing isolation.And power supply output port
Operating current be only dependent upon the operating current of relay response side, the susceptibility that required cost changes with operating current is isolated
Extremely low, the cost needed for being isolated when operating current changes in several peaces will not change substantially.
On the basis of the above embodiments, the power-supply system power supply output port isolation dress provided in the embodiment of the present invention
It sets, the output voltage secure threshold of resistance value and the power system mains of the predetermined voltage threshold based on the sampling resistor
It determines.
Specifically, due to will judge whether the output voltage of power system mains is to meet the voltage of safety requirements to be equivalent to
Whether the voltage for judging sampling resistor both ends is more than predetermined voltage threshold, and is returned what power system mains and sampling resistor were formed
Lu Zhong, the supply current of power system mains is identical with the electric current for flowing through sampling resistor, therefore default in the embodiment of the present invention
Voltage threshold can pass through the output voltage of the resistance value of sampling resistor, the equivalent internal resistance of power system mains and power system mains
Secure threshold determines.
In the embodiment of the present invention, the output voltage secure threshold of predetermined voltage threshold and power system mains is to correspond
's.
The power-supply system power supply output port isolating device provided in the embodiment of the present invention can be applied to sun-generated electric power system
The output voltage of power system mains can be set as 60V, but the present invention is implemented by taking 48V solar electric power supply system as an example by system
The power-supply system power supply provided in example and is not limited to the application to this at output port isolating device.
As shown in Fig. 2, on the basis of the above embodiments, the power-supply system power supply output end provided in the embodiment of the present invention
Mouth isolating device, further includes: voltage regulator module 6.The input terminal of voltage regulator module 6 and the output end of power system mains 51
Connection, the output end of voltage regulator module 6 are connect with relay 4, and voltage regulator module 6 is used for the defeated of power system mains 51
The voltage of outlet is adjusted to the target voltage of power supply output port 52, to be powered for power supply output port 52.For electricity output
Port 52 is specifically as follows USB interface, and but not limited to this.When output port 52 of powering is USB interface, output end of powering
The target voltage of mouth 52 is specially 5V, and voltage regulator module 6 plays antihypertensive effect at this time.
As shown in figure 3, on the basis of the above embodiments, the power-supply system power supply output end provided in the embodiment of the present invention
Mouth isolating device, relay 4 include controlled end and control terminal, are specifically as follows contact relay, are only with relay 4 below
It is illustrated for contact relay.Relay 4 includes the first movable contact 41, the first normally opened contact 42, the first normally-closed contact
43, the first relay spring 44, the second movable contact 47, the second normally opened contact 48, the second normally-closed contact 49, the second relay spring
410, iron core 45 and coil 46.
Coil 46 is wrapped in 45 outside of iron core, and coil 46 is connect with control module 3, and coil 46 and iron core 45 constitute relay
4 control terminal.
The output end of voltage regulator module 6 is connect with the first movable contact 41, the first normally-closed contact 43 and the second normally-closed contact
49 connect with power supply output port 52；First movable contact 41 passes through the first relay spring 44 and the first normally opened contact 42 or the
The contact of one normally-closed contact 43.First movable contact 41, the first normally opened contact 42, the first normally-closed contact 43 and the first relay spring 44
Constitute the controlled end of relay 4.
Second movable contact 47 ground connection, the second movable contact 47 by the second relay spring 410 and the second normally opened contact 48 or
The contact of second normally-closed contact 49, and when the first movable contact 41 is contacted by the first relay spring 44 with the first normally-closed contact 43
When, the second movable contact 47 is contacted by the second relay spring 410 with the second normally-closed contact 49.When the first movable contact 41 passes through the
When one relay spring 44 and the first normally opened contact 42 contact, the second movable contact 47 passes through the second relay spring 410 and second
Normally opened contact 48 contacts.
Specifically, under normal circumstances, i.e., the case where voltage at 1 both ends of sampling resistor is less than or equal to predetermined voltage threshold
Under, the first movable contact 41 of relay 4 is contacted by the first relay spring 44 with the first normally-closed contact 43, and the of relay 4
Two movable contacts 47 are contacted with the second normally-closed contact 49 by the second relay spring 410, power system mains 51 and for electricity output
Port 52 is connected, and the power supply output port 52 of power system mains 51 is made to power.
In the case that i.e. the voltage at 1 both ends of sampling resistor is higher than predetermined voltage threshold under abnormal condition, relay 4
By the control of control module 3, makes the electric current for being connected with default size in the coil 46 of relay 4, generate iron core 45 sufficiently large
Magnetic force can attract the first relay spring 44, contact the other end of the first relay spring 44 with the first normally opened contact 42,
And then contact the first movable contact 41 with the first normally opened contact 42 by the first relay spring 44, pass through the second movable contact 47
Second relay spring 410 is contacted with the second normally opened contact 48, and power system mains 51 are isolated with power supply output port 52, are made
Power system mains 51 are no longer powered for power supply output port 52.
It should be noted that electric current in coil 46 can be controlled by control module whether there is or not and size, specifically can be used three
Pole pipe switching circuit is as control module.
It can be grounded by the second movable contact in the embodiment of the present invention, can play the role of protecting circuit, make power supply system
Main body of uniting is safer when being power supply output port power supply.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
- The output port isolating device 1. a kind of power-supply system is powered characterized by comprising sampling resistor, voltage comparator, control Molding block and relay；The power-supply system includes power system mains and power supply output port, and the sampling resistor accesses the power-supply system master Body, the voltage comparator, the control module and the relay are sequentially connected；One input terminal of the voltage comparator is used for inputting predetermined voltage threshold, another input terminal of the voltage comparator It is connect in the sampling resistor, the voltage comparator is used to measure the voltage at the sampling resistor both ends, and adopts described The voltage at sample resistance both ends is compared with the predetermined voltage threshold, if the voltage at the sampling resistor both ends is higher than described pre- If voltage threshold, then the voltage comparator is also used to that the control module is driven to control the relay for the power-supply system Main body is isolated with the power supply output port.
- The output port isolating device 2. power-supply system according to claim 1 is powered, which is characterized in that the predeterminated voltage Threshold value is determined based on the resistance value of the sampling resistor and the output voltage secure threshold of the power system mains.
- The output port isolating device 3. power-supply system according to claim 1 is powered, which is characterized in that further include: voltage Adjustment module；The input terminal of the voltage regulator module is connect with the output end of the power system mains, the voltage regulator module Output end is connect with the relay, and the voltage regulator module is used for the voltage tune of the output end of the power system mains It saves to the target voltage of the power supply output port.
- The output port isolating device 4. power-supply system according to claim 3 is powered, which is characterized in that the relay is Contact relay；The contact relay include the first movable contact, the first normally opened contact, the first normally-closed contact, the first relay spring, Second movable contact, the second normally opened contact, the second normally-closed contact, the second relay spring, iron core and coil；The coil is wrapped on the outside of the iron core, and the coil is connect with control module；The output end of the voltage regulator module is connect with first movable contact, and first normally-closed contact and described second is often Closed contact is connect with the power supply output port；First movable contact passes through first relay spring and described first Normally opened contact or first normally-closed contact contact；The second movable contact ground connection, second movable contact pass through second relay spring and second normally opened contact Or the second normally-closed contact contact, and when first movable contact is normally closed by first relay spring and described first When contact contacts, second movable contact is contacted by second relay spring with second normally-closed contact；When described When first movable contact is contacted by first relay spring and first normally opened contact, second movable contact passes through institute The second relay spring is stated to contact with second normally opened contact.
- The output port isolating device 5. power-supply system according to claim 4 is powered, which is characterized in that if the voltage is high In the predetermined voltage threshold, then the voltage comparator is specifically used for: driving the dynamic touching of the control module control described first Point is contacted by first relay spring with first normally opened contact, and control second movable contact passes through described the Two relay springs are contacted with second normally opened contact, by the power system mains and the power supply output port every From.
- 6. power-supply system output port isolating device according to claim 4, which is characterized in that if the voltage be lower than or Equal to the predetermined voltage threshold, then the voltage comparator is also used to: driving the dynamic touching of the control module control described first Point is contacted by first relay spring with first normally-closed contact, and control second movable contact passes through described the Two relay springs are contacted with second normally-closed contact, and the power system mains and the power supply output port are led It is logical.
- The output port isolating device 7. power-supply system according to claim 2 is powered, which is characterized in that the power-supply system The output voltage secure threshold of main body is specially 60V.
- 8. the power supply of power-supply system described in any one of -7 output port isolating device according to claim 1, which is characterized in that institute Stating control module is specially transistor switching circuit.
- 9. the power supply of power-supply system described in any one of -7 output port isolating device according to claim 1, which is characterized in that institute Stating power supply output port is specially USB port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910096303.0A CN109861327A (en) | 2019-01-31 | 2019-01-31 | Power-supply system power supply output port isolating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910096303.0A CN109861327A (en) | 2019-01-31 | 2019-01-31 | Power-supply system power supply output port isolating device |
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| Publication Number | Publication Date |
|---|---|
| CN109861327A true CN109861327A (en) | 2019-06-07 |
Family
ID=66897154
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910096303.0A Pending CN109861327A (en) | 2019-01-31 | 2019-01-31 | Power-supply system power supply output port isolating device |
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| CN101447783A (en) * | 2008-12-10 | 2009-06-03 | 上海复展照明科技有限公司 | Self-sustained protective circuit based on gate circuit and implementation method thereof |
| CN102901864A (en) * | 2012-10-11 | 2013-01-30 | 阳光电源股份有限公司 | Voltage detecting device |
| CN203251265U (en) * | 2013-04-10 | 2013-10-23 | 深圳市寿百瑞机械科技有限公司 | Motor switching circuit and motor driving device |
| CN104734630A (en) * | 2013-12-19 | 2015-06-24 | 湖北歌润新能源有限责任公司 | Over-current protection and startup recovery circuit for solar photovoltaic controller |
| CN107979269A (en) * | 2017-11-08 | 2018-05-01 | 珠海格力电器股份有限公司 | Current foldback circuit |
-
2019
- 2019-01-31 CN CN201910096303.0A patent/CN109861327A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070216502A1 (en) * | 2006-03-20 | 2007-09-20 | Elesta Relays Gmbh | Relay |
| CN101221863A (en) * | 2007-09-07 | 2008-07-16 | 西安交通大学 | Double coil variable current control circuit of vacuum circuit breaker permanent magnet mechanism |
| CN101447783A (en) * | 2008-12-10 | 2009-06-03 | 上海复展照明科技有限公司 | Self-sustained protective circuit based on gate circuit and implementation method thereof |
| CN102901864A (en) * | 2012-10-11 | 2013-01-30 | 阳光电源股份有限公司 | Voltage detecting device |
| CN203251265U (en) * | 2013-04-10 | 2013-10-23 | 深圳市寿百瑞机械科技有限公司 | Motor switching circuit and motor driving device |
| CN104734630A (en) * | 2013-12-19 | 2015-06-24 | 湖北歌润新能源有限责任公司 | Over-current protection and startup recovery circuit for solar photovoltaic controller |
| CN107979269A (en) * | 2017-11-08 | 2018-05-01 | 珠海格力电器股份有限公司 | Current foldback circuit |
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