CN205750616U - A kind of auxiliary power supply of photovoltaic inverter control circuit - Google Patents
A kind of auxiliary power supply of photovoltaic inverter control circuit Download PDFInfo
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- CN205750616U CN205750616U CN201620659237.5U CN201620659237U CN205750616U CN 205750616 U CN205750616 U CN 205750616U CN 201620659237 U CN201620659237 U CN 201620659237U CN 205750616 U CN205750616 U CN 205750616U
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Abstract
This utility model relates to photovoltaic DC-to-AC converter technical field, disclose a kind of auxiliary power supply of photovoltaic inverter control circuit, including control chip U1, audion Q2, resistance R2, resistance R4 and resistance R5, the emitter stage of described audion Q2 is connected with the VCC pin of control chip U1, its colelctor electrode is connected with solar panel output cathode PV+ by resistance R5, its base stage is by ground connection after resistance R2, described resistance R4 one end is connected with solar panel output cathode PV+, and the other end is connected with the base stage of audion Q2.This utility model is in use, when solar cell panel voltages input ratio is the when of relatively low, resistance R2 and R4 is not enough to the base stage producing enough voltage to audion Q2, audion Q2 is not turned on, and the VCC pin of control chip U1 is not intended for piezoelectric voltage, and accessory power supply does not works, when voltage is sufficiently high time, audion Q2 turns on, and solar panel provides the enough starting current of VCC pin of control chip U1 by current-limiting resistance R5, and this utility model can avoid accessory power supply frequent starting.
Description
Technical field
This utility model relates to photovoltaic DC-to-AC converter technical field, more specifically, auxiliary particularly to a kind of photovoltaic DC-to-AC converter
Help power control circuit.
Background technology
Photovoltaic generation is to utilize the photovoltaic effect of interface that luminous energy is directly translated into a kind of skill of electric energy
Art.Mainly it is made up of solar panel (assembly), controller and inverter three parts.
During the use of photovoltaic DC-to-AC converter, owing to the input of inverter is solar panel.And solaode
Voltage and current produced by plate depends on the intensity of solar irradiation.Early, late and overcast and rainy in the case of solar panel
Power limited, be not enough to support the power needed for inverter startup.And the auxiliary power start moment of inverter needs to compare
Big power, comes to a startup, and cell plate voltage will be pulled down under the voltage conditions that accessory power supply can start cause switch
Power supply is restarted.To this end, accessory power supply occurs as soon as, in the case of power is inadequate, the phenomenon frequently restarted.Further, inverse due to photovoltaic
Becoming the current quality guarantee of device minimum is all more than 5 years, and owing to accessory power supply occurs frequently restarting every day, strong influence is mutually powered-down
The service life on road.For this reason, it is necessary to design a kind of auxiliary power supply of photovoltaic inverter that can solve accessory power supply frequent starting
Control circuit.
Utility model content
The purpose of this utility model is to provide a kind of photovoltaic DC-to-AC converter that can avoid accessory power supply frequent starting to assist
Power control circuit.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of auxiliary power supply of photovoltaic inverter control circuit, including control chip U1, audion Q2, resistance R2, resistance R4
With resistance R5, the emitter stage of described audion Q2 is connected with the VCC pin of control chip U1, its colelctor electrode by resistance R5 with too
Sun can connect by cell panel output cathode PV+, and its base stage is by ground connection after resistance R2, described resistance R4 one end and solar panel
Output cathode PV+ connects, and the other end is connected with the base stage of audion Q2.
Further, the Zener diode D2 in parallel with resistance R2 is also included.
Further, the wrong time testing circuit being connected with control chip U1, this wrong time testing circuit are also included
Including resistance R1, resistance R3, electric capacity C1, Zener diode D1 and audion Q1, the base stage of described audion Q1 and audion Q2
Base stage connect, its grounded emitter, its colelctor electrode is connected with electric capacity C1 one end, Zener diode D1 negative electrode, described electric capacity C1
The other end is connected with the TIME pin of control chip U1, described Zener diode D1 plus earth, described resistance R1 one end with too
Sun can connect by cell panel output cathode PV+, and the other end is connected with audion Q1 colelctor electrode, resistance R3, the described resistance R3 other end
Ground connection.
Further, also including the dummy load circuit being connected with described control chip U1, described dummy load circuit includes MOS
Pipe Q3, audion Q4, resistance R7 and resistance R8, the source electrode of described audion Q3 is connected with the colelctor electrode of triode Q4, its grid
Ground connection, its drain electrode is connected with solar panel output cathode PV+ through resistance R7, the grounded emitter of described audion Q4,
Its base stage is connected by resistance R8 and+5V power supply.
Further, resistance R6, resistance R9 and Zener diode D3, one end of described resistance R6 and triode Q4 are also included
Colelctor electrode connect, its other end is connected with solar panel output cathode PV+, and described resistance R9 is connected to audion Q4's
Between collector and emitter, the plus earth of described Zener diode D3, its negative electrode is connected with the colelctor electrode of audion Q4.
Compared with prior art, the utility model has the advantage of: this utility model in use, works as solar panel
Voltage input ratio is the when of relatively low, and resistance R2 and R4 is not enough to the base stage producing enough voltage to audion Q2, audion Q2
Being not turned on, the VCC pin of control chip U1 is not intended for piezoelectric voltage, and accessory power supply does not works, when voltage is sufficiently high time, and three poles
Pipe Q2 turns on, and solar panel provides the enough starting current of VCC pin of control chip U1 by current-limiting resistance R5, uses
This utility model can avoid accessory power supply frequent starting.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of auxiliary power supply of photovoltaic inverter control circuit of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model
Can be easier to be readily appreciated by one skilled in the art with feature, thus protection domain of the present utility model is made apparent clearly
Define.
In order to reach the purpose of this utility model, the technical solution adopted in the utility model is as follows:
Refering to shown in Fig. 1, a kind of auxiliary power supply of photovoltaic inverter control circuit that this utility model provides, including controlling core
Sheet U1, audion Q2, resistance R2, resistance R4 and resistance R5, the emitter stage of described audion Q2 and the VCC pin of control chip U1
Connecting, its colelctor electrode is connected with solar panel output cathode PV+ by resistance R5, and its base stage passes through ground connection after resistance R2,
Described resistance R4 one end is connected with solar panel output cathode PV+, and the other end is connected with the base stage of audion Q2.
This utility model also includes the Zener diode D2 in parallel with resistance R2.
The model of described control chip U1 is NCP1351BDR2G.
This utility model in use, as solar cell panel voltages input ratio when of relatively low, resistance R2 and resistance R4
Being not enough to the base stage producing enough voltage to audion Q2, audion Q2 is not turned on, and the VCC pin of control chip U1 is not intended for
Piezoelectric voltage, accessory power supply does not works, and when voltage is sufficiently high time, audion Q2 turns on, and solar panel is by current limliting electricity
Hinder the starting current that the VCC pin of R5 offer control chip U1 is enough, use this utility model that accessory power supply can be avoided frequent
Start.
This utility model also includes the wrong time testing circuit being connected with control chip U1, this wrong time testing circuit
Including resistance R1, resistance R3, electric capacity C1, Zener diode D1 and audion Q1, the base stage of described audion Q1 and audion Q2
Base stage connect, its grounded emitter, its colelctor electrode is connected with electric capacity C1 one end, Zener diode D1 negative electrode, described electric capacity C1
The other end is connected with the TIME pin of control chip U1, described Zener diode D1 plus earth, described resistance R1 one end with too
Sun can connect by cell panel output cathode PV+, and the other end is connected with audion Q1 colelctor electrode, resistance R3, the described resistance R3 other end
Ground connection.
TIME pin is the wrong time detection of control chip U1, when this pin detects mistake when, will limit
The driving output of control chip U1, control chip U1 will not work, and accessory power supply does not works.Only enough when input voltage
The when of high, audion Q1 turns on, and the other end of electric capacity C1 is pulled to power supply ground.The detection of TIME pin is correct, control chip U1
Constituting the condition started, control chip U1 allows output, and accessory power supply can start in the case of other condition meets.
This utility model also includes the dummy load circuit being connected with described control chip U1, and described dummy load circuit includes
Metal-oxide-semiconductor Q3, audion Q4, resistance R7 and resistance R8, the source electrode of described audion Q3 is connected with the colelctor electrode of triode Q4, its grid
Pole ground connection, its drain electrode is connected with solar panel output cathode PV+ through resistance R7, and the emitter stage of described audion Q4 connects
Ground, its base stage is connected by resistance R8 and+5V power supply.
This utility model also includes resistance R6, resistance R9 and Zener diode D3, one end of described resistance R6 and triode
The colelctor electrode of Q4 connects, and its other end is connected with solar panel output cathode PV+, and described resistance R9 is connected to audion Q4
Collector and emitter between, the plus earth of described Zener diode D3, its negative electrode is connected with the colelctor electrode of audion Q4.
Resistance R7 is fictitious load, and the shutoff of audion Q3 determines whether switching inputs supply voltage to accessory power supply in fictitious load
On.This fictitious load power setting is good, and when the voltage virtual height of solar panel, the when that actual current being the biggest, fictitious load is thrown
Entering on input voltage, the power of consumption can drag down solar cell panel voltages to a certain degree.Guaranteeing can at accessory power supply
The when of startup, the power of solar panel generation is sufficiently large will not restart, and this fictitious load normally works at accessory power supply
After, the SPS+5V of generation, the conducting of metal-oxide-semiconductor Q4 can be controlled, cause the base stage of audion Q3 to be pulled to power supply ground, audion Q3 closes
Disconnected, fictitious load R7 is no longer added on input voltage, and the when that such inverter normally working, this Partial Power will not disappear in vain
Consumption, improves the generating efficiency of inverter, it is ensured that client uses the income of inverter.
Although being described in conjunction with the accompanying embodiment of the present utility model, but patent owner can want in appended right
Various deformation or amendment is made, as long as less than the protection model described by claim of the present utility model within the scope of asking
Enclose, all should be within protection domain of the present utility model.
Claims (5)
1. an auxiliary power supply of photovoltaic inverter control circuit, it is characterised in that: include control chip U1, audion Q2, resistance
R2, resistance R4 and resistance R5, the emitter stage of described audion Q2 is connected with the VCC pin of control chip U1, and its colelctor electrode passes through
Resistance R5 is connected with solar panel output cathode PV+, its base stage by ground connection after resistance R2, described resistance R4 one end with too
Sun can connect by cell panel output cathode PV+, and the other end is connected with the base stage of audion Q2.
Auxiliary power supply of photovoltaic inverter control circuit the most according to claim 1, it is characterised in that: also include and resistance R2
Zener diode D2 in parallel.
Auxiliary power supply of photovoltaic inverter control circuit the most according to claim 1, it is characterised in that: also include and control core
The wrong time testing circuit that sheet U1 connects, this wrong time testing circuit includes resistance R1, resistance R3, electric capacity C1, voltage stabilizing two
Pole pipe D1 and audion Q1, the base stage of described audion Q1 is connected with the base stage of audion Q2, its grounded emitter, its colelctor electrode
Being connected with electric capacity C1 one end, Zener diode D1 negative electrode, the described electric capacity C1 other end is connected with the TIME pin of control chip U1,
Described Zener diode D1 plus earth, described resistance R1 one end is connected with solar panel output cathode PV+, the other end with
Audion Q1 colelctor electrode, resistance R3 connect, described resistance R3 other end ground connection.
Auxiliary power supply of photovoltaic inverter control circuit the most according to claim 1, it is characterised in that: also include and described control
The dummy load circuit that coremaking sheet U1 connects, described dummy load circuit includes metal-oxide-semiconductor Q3, audion Q4, resistance R7 and resistance R8, institute
The colelctor electrode of the source electrode and triode Q4 of stating audion Q3 is connected, its grounded-grid, and its drain electrode is through resistance R7 and solar-electricity
Pond plate output cathode PV+ connects, the grounded emitter of described audion Q4, and its base stage is connected by resistance R8 and+5V power supply.
Auxiliary power supply of photovoltaic inverter control circuit the most according to claim 4, it is characterised in that: also include resistance R6,
Resistance R9 and Zener diode D3, one end of described resistance R6 is connected with the colelctor electrode of triode Q4, its other end and solar energy
Cell panel output cathode PV+ connects, and described resistance R9 is connected between the collector and emitter of audion Q4, described voltage stabilizing two
The plus earth of pole pipe D3, its negative electrode is connected with the colelctor electrode of audion Q4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620659237.5U CN205750616U (en) | 2016-06-24 | 2016-06-24 | A kind of auxiliary power supply of photovoltaic inverter control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620659237.5U CN205750616U (en) | 2016-06-24 | 2016-06-24 | A kind of auxiliary power supply of photovoltaic inverter control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205750616U true CN205750616U (en) | 2016-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620659237.5U Active CN205750616U (en) | 2016-06-24 | 2016-06-24 | A kind of auxiliary power supply of photovoltaic inverter control circuit |
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| CN (1) | CN205750616U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938380A (en) * | 2016-06-24 | 2016-09-14 | 广州三晶电气股份有限公司 | Auxiliary power supply control circuit of photovoltaic inverter |
| WO2021093356A1 (en) * | 2019-11-13 | 2021-05-20 | 北京派尔特医疗科技股份有限公司 | Stapler and timed discharge method thereof |
| CN117792064A (en) * | 2024-02-28 | 2024-03-29 | 美世乐(广东)新能源科技有限公司 | Auxiliary power supply system of photovoltaic inverter |
-
2016
- 2016-06-24 CN CN201620659237.5U patent/CN205750616U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938380A (en) * | 2016-06-24 | 2016-09-14 | 广州三晶电气股份有限公司 | Auxiliary power supply control circuit of photovoltaic inverter |
| CN105938380B (en) * | 2016-06-24 | 2018-01-16 | 广州三晶电气股份有限公司 | A kind of auxiliary power supply of photovoltaic inverter control circuit |
| WO2021093356A1 (en) * | 2019-11-13 | 2021-05-20 | 北京派尔特医疗科技股份有限公司 | Stapler and timed discharge method thereof |
| CN117792064A (en) * | 2024-02-28 | 2024-03-29 | 美世乐(广东)新能源科技有限公司 | Auxiliary power supply system of photovoltaic inverter |
| CN117792064B (en) * | 2024-02-28 | 2024-05-07 | 美世乐(广东)新能源科技有限公司 | Auxiliary power supply system of photovoltaic inverter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: The Gan of Ouyang family Inventor after: Mo Sanfu Inventor after: Lu Xueming Inventor after: Li Yun Inventor before: Mo Sanfu Inventor before: Lu Xueming Inventor before: The Gan of Ouyang family Inventor before: Li Yun |
|
| COR | Change of bibliographic data |