CN209215467U - Photovoltaic controller input electric cur- rent measure circuit - Google Patents
Photovoltaic controller input electric cur- rent measure circuit Download PDFInfo
- Publication number
- CN209215467U CN209215467U CN201821780718.7U CN201821780718U CN209215467U CN 209215467 U CN209215467 U CN 209215467U CN 201821780718 U CN201821780718 U CN 201821780718U CN 209215467 U CN209215467 U CN 209215467U
- Authority
- CN
- China
- Prior art keywords
- circuit unit
- current
- input
- power supply
- triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model provides a kind of photovoltaic controller input electric cur- rent measure circuit, including current detecting circuit unit, current sampling circuit unit and power supply circuit unit, the current sampling circuit unit is for acquiring the input current size that the current detecting circuit unit detects, the power supply circuit unit is used to power to the current sampling circuit unit, it is characterized by: the current detecting circuit unit includes the PV positive input of photovoltaic battery panel, PV positive input is connected to the drain electrode of counnter attack metal-oxide-semiconductor.The detection circuit carries out the detection of electric current by detecting the conducting resistance of counnter attack metal-oxide-semiconductor, it does not need individually to increase device (Hall or sampling resistor), and the power supply of sample circuit needs is simply built by triode and voltage-stabiliser tube, it does not need additionally to increase isolated power supply.Voltage swing by detecting amplifier input terminal PV_I directly reflects the size of PV input terminal electric current, to achieve the purpose that PV input terminal current detecting.
Description
Technical field
The utility model relates to a kind of photovoltaic controllers, in particular to a kind of for detecting photovoltaic battery panel inlet circuit
Detection circuit.
Background technique
With the increasingly increasingly exacerbation of shortage and environmental pollution of the energy, clean energy resource, renewable energy become current
The field that countries in the world are given priority to, wherein photovoltaic power generation technology because its have many advantages, such as green, environmental protection, it is renewable increasingly by
To the attention and welcome of people.In photovoltaic power generation technology, photovoltaic controller is for controlling multichannel solar cell array to storage
The unstable direct current that battery charging and battery generate photovoltaic module to solar inverter load supplying is converted into
Stable DC, therefore photovoltaic controller is played a crucial role during photovoltaic power generation.
It is particularly important to the detection of PV input terminal electric current in controller circuitry in the photovoltaic controller course of work, at present
Common practice is detected using Hall, is needed individual isolated power supply, Hall sensor is sealed in input circuit, so
Afterwards by changes of magnetic field caused by curent change, so that the signal of Hall output generates corresponding change, and then corresponding electric current is logical
The variation that resistance generates voltage is crossed, corresponding voltage signal is detected by AD, reflects the size variation of input current.Also
A kind of way is that sampling resistor is sealed in major loop, and individual isolated power supply is needed to carry out Differential Detection in this way.
Above traditional PV input terminal current detection circuit has certain problems, and exactly requires that electricity is individually isolated
Source, and circuit is relative complex, it is this kind of to having certain limitation in the higher product of cost requirement in controller, charger etc.,
For this problem, a kind of detection circuit of PV input terminal electric current is redesigned in this patent.
Utility model content
In view of the foregoing deficiencies of prior art, simple, production that the purpose of this utility model is to provide a kind of structures
Photovoltaic controller input electric cur- rent measure circuit at low cost.
In order to achieve the above objects and other related objects, the utility model provides a kind of photovoltaic controller input electric cur- rent measure
Circuit, including current detecting circuit unit, current sampling circuit unit and power supply circuit unit, the current sampling circuit unit
The input current size detected for acquiring the current detecting circuit unit, the power supply circuit unit are used for the electricity
Flow the power supply of sample circuit unit, it is characterised in that: the current detecting circuit unit includes the PV forward direction input of photovoltaic battery panel
End, PV positive input are connected to the drain electrode of counnter attack metal-oxide-semiconductor, and the source electrode of counnter attack metal-oxide-semiconductor is connected to the source electrode of main switch, the
The anode of two capacitors, the drain electrode of main switch are connected to the cathode of freewheeling diode and one end of inductance, and the other end of inductance connects
It is connected to the anode of battery, the anode of third capacitor, cathode, the afterflow of the PV negative input and the second capacitor of photovoltaic battery panel
The cathode of the anode of diode, the cathode of third capacitor and battery connects；The voltage output end of power supply circuit unit is connected to
The power input and positive input of the source electrode of main switch, current sampling circuit unit, PV positive input are connected to electricity
Flow the reverse input end of sample circuit unit.
Preferably, the power supply circuit unit includes the first triode, and the base stage of triode passes through first resistor and power supply
Connection, the emitter of triode by second resistance ground connection, the collector of the first triode be connected to the anode of zener diode,
4th capacitor is simultaneously grounded, and the cathode of zener diode is connected to the other end of the 4th capacitor and forms the voltage of power supply circuit unit
Output end.
Preferably, the current sampling circuit unit includes operational amplifier, and the positive input of operational amplifier passes through
The reverse input end of the connection of the voltage output end of 4th resistance and power supply circuit unit, operational amplifier passes through 3rd resistor and PV
Positive input connection, the reverse input end of operational amplifier are connect with the emitter of the second triode, the base of the second triode
The connection of the output end of pole and operational amplifier, the collector of the second triode are connected to the 5th resistance and sampled output, and the 5th
The other end of resistance is grounded.
Preferably, first capacitor is parallel between the PV positive input and PV reverse input end of the photovoltaic battery panel.
As described above, this photovoltaic controller input electric cur- rent measure circuit has the advantages that the detection circuit passes through
The conducting resistance of counnter attack metal-oxide-semiconductor is detected to carry out the detection of electric current, does not need individually to increase device (Hall or sampling resistor), and
The power supply that sample circuit needs are simply built by triode and voltage-stabiliser tube, does not need additionally to increase isolated power supply.Pass through detection
The voltage swing of amplifier input terminal PV_I directly reflects the size of PV input terminal electric current, to reach PV input terminal current detecting
Purpose.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model embodiment current detecting circuit unit.
Fig. 2 is the circuit diagram of the utility model embodiment power supply circuit unit.
Fig. 3 is the circuit diagram of the utility model embodiment current sampling circuit unit.
Specific embodiment
Illustrate the embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages and effect of the utility model easily.The utility model can also be by addition
Different specific embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints and answer
With carrying out various modifications or alterations under the spirit without departing from the utility model.
Please refer to Fig. 1,2,3.It should be noted that diagram provided in the present embodiment only illustrates this reality in a schematic way
With novel basic conception, only shown in schema then with related component in the utility model rather than group when according to actual implementation
Number of packages mesh, shape and size are drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind,
And its assembly layout kenel may also be increasingly complex.
As shown in Figure 1, 2, 3, the utility model provides a kind of photovoltaic controller input electric cur- rent measure circuit comprising electric current
Detection circuit unit, current sampling circuit unit and power supply circuit unit, current sampling circuit unit is for acquiring current detecting
The input current size that circuit unit detects, power supply circuit unit are used to power to the current sampling circuit unit.Electric current
The sampled output PV-I of sample circuit unit, power supply circuit unit are equipped with voltage output end PV-C+.
As shown in Figure 1, current detecting circuit unit include photovoltaic battery panel 1 PV positive input PV+, PV forward direction it is defeated
Enter to hold PV+ to be connected to the drain electrode of counnter attack metal-oxide-semiconductor Q1, the source electrode of counnter attack metal-oxide-semiconductor Q1 is connected to the source electrode of main switch Q2, the second electricity
Hold the anode of C2, the drain electrode of main switch Q2 is connected to the cathode of sustained diode 1 and one end of inductance L1, and inductance L1's is another
One end is connected to the anode of the anode of battery 2, third capacitor C3, the electricity of the PV negative input PV- of photovoltaic battery panel 1 and second
Hold the cathode connection of the cathode of C2, the anode of sustained diode 1, the cathode of third capacitor C3 and battery 2, current sample electricity
The power input and positive input of road unit, PV positive input (PV+) are connected to the reversed of current sampling circuit unit
Input terminal.It is parallel with first capacitor C1 between the PV positive input PV+ and PV reverse input end PV- of photovoltaic battery panel 1, the
One capacitor C1 is charging capacitor, can prevent voltage jump in this way.
As shown in Fig. 2, power supply circuit unit includes the first triode Q3, the base stage of the first triode Q3 passes through first resistor
R1 is connect with power supply V1, and the emitter of triode Q3 is grounded by second resistance R2, and the collector of the first triode Q3 is connected to
The anode of zener diode D2, the 4th capacitor C4 are simultaneously grounded, and the cathode of zener diode D2 is connected to the another of the 4th capacitor C4
The voltage output end PV-C+ of power supply circuit unit is held and is formed, the voltage output end PV-C+ of power supply circuit unit is connected to master and opens
Close the source electrode of pipe (Q2).
As shown in figure 3, current sampling circuit unit includes operational amplifier U1, the positive input of operational amplifier U1 is logical
The voltage output end PV-C+ connection of the 4th resistance R4 and power supply circuit unit is crossed, the reverse input end of operational amplifier U1 passes through
3rd resistor R3 is connect with PV positive input PV+, the transmitting of the reverse input end of operational amplifier U1 and the second triode Q4
Pole connection, the base stage of the second triode Q4 are connect with the output end of operational amplifier U1, the collector connection of the second triode Q4
To the 5th resistance R5 and sampled output PV-I, the other end of the 5th resistance R5 is grounded, and passes through detection sampled output PV-I's
Size of current can reflect photovoltaic controller input current size.
The circuit operation principle: the circuit is using current sampling circuit and current detection circuit by power supply circuit unit
Unit provides power supply and reference voltage, counnter attack metal-oxide-semiconductor Q1 is arranged on current detecting circuit unit, by detecting counnter attack metal-oxide-semiconductor Q1
Conducting resistance carry out current detecting, the current feedback detected gives current sampling circuit unit, pass through current sampling circuit
Comparison, the sampling output of unit can react the current signal of photovoltaic controller input current size.
The detection circuit carries out the detection of electric current by detecting the conducting resistance of counnter attack metal-oxide-semiconductor, does not need individually to increase
Device (Hall or sampling resistor), and the power supply that sample circuit needs simply is built by triode and voltage-stabiliser tube, do not need volume
Outer increase isolated power supply.Voltage swing by detecting amplifier input terminal PV_I directly reflects the size of PV input terminal electric current, from
And achieve the purpose that PV input terminal current detecting.So the utility model effectively overcome various shortcoming in the prior art and
Has high industrial utilization value.
The above embodiments are only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model
All equivalent modifications or change completed under mind and technical idea, should be covered by the claim of the utility model.
Claims (4)
1. a kind of photovoltaic controller input electric cur- rent measure circuit, including current detecting circuit unit, current sampling circuit unit and
Power supply circuit unit, the current sampling circuit unit is for acquiring the input current that the current detecting circuit unit detects
Size, the power supply circuit unit are used to power to the current sampling circuit unit, it is characterised in that: the current detecting electricity
Road unit includes the PV positive input (PV+) of photovoltaic battery panel (1), and PV positive input (PV+) is connected to counnter attack metal-oxide-semiconductor
(Q1) drain electrode, the source electrode of counnter attack metal-oxide-semiconductor (Q1) are connected to the anode of the source electrode of main switch (Q2), the second capacitor (C2), main
The drain electrode of switching tube (Q2) is connected to the cathode of freewheeling diode (D1) and one end of inductance (L1), and the other end of inductance (L1) connects
It is connected to the anode of battery (2), the anode of third capacitor (C3), the PV negative input (PV-) and second of photovoltaic battery panel (1)
The cathode connection of the cathode of capacitor (C2), the anode of freewheeling diode (D1), the cathode of third capacitor (C3) and battery (2)；
The voltage output end (PV-C+) of power supply circuit unit is connected to the electricity of the source electrode of main switch (Q2), current sampling circuit unit
Source input terminal and positive input, PV positive input (PV+) are connected to the reverse input end of current sampling circuit unit.
2. photovoltaic controller input electric cur- rent measure circuit according to claim 1, it is characterised in that: the power supply circuit list
Member includes the first triode (Q3), and the base stage of the first triode (Q3) is connect by first resistor (R1) with power supply (V1), three poles
The emitter for managing (Q3) is grounded by second resistance (R2), and the collector of the first triode (Q3) is connected to zener diode (D2)
Anode, the 4th capacitor (C4) and be grounded, the cathode of zener diode (D2) is connected to the other end and shape of the 4th capacitor (C4)
At the voltage output end (PV-C+) of power supply circuit unit.
3. photovoltaic controller input electric cur- rent measure circuit according to claim 2, it is characterised in that: the current sample electricity
Road unit includes operational amplifier (U1), and the positive input of operational amplifier (U1) passes through the 4th resistance (R4) and power supply circuit
The voltage output end (PV-C+) of unit connects, and the reverse input end of operational amplifier (U1) is passing through 3rd resistor (R3) and PV just
It being connected to input terminal (PV+), the reverse input end of operational amplifier (U1) is connect with the emitter of the second triode (Q4), and second
The base stage of triode (Q4) is connect with the output end of operational amplifier (U1), and the collector of the second triode (Q4) is connected to the 5th
Resistance (R5) and sampled output (PV-I), the other end ground connection of the 5th resistance (R5).
4. photovoltaic controller input electric cur- rent measure circuit according to claim 1, it is characterised in that: the photovoltaic battery panel
(1) first capacitor (C1) is parallel between PV positive input (PV+) and PV reverse input end (PV-).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821780718.7U CN209215467U (en) | 2018-10-31 | 2018-10-31 | Photovoltaic controller input electric cur- rent measure circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821780718.7U CN209215467U (en) | 2018-10-31 | 2018-10-31 | Photovoltaic controller input electric cur- rent measure circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209215467U true CN209215467U (en) | 2019-08-06 |
Family
ID=67457659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821780718.7U Active CN209215467U (en) | 2018-10-31 | 2018-10-31 | Photovoltaic controller input electric cur- rent measure circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209215467U (en) |
-
2018
- 2018-10-31 CN CN201821780718.7U patent/CN209215467U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203368132U (en) | Power switching circuit and dual-power supply device | |
| CN206040534U (en) | Relay steps down and keeps drive circuit | |
| CN209516727U (en) | A kind of solar photovoltaic inverter of safe and intelligent | |
| CN206602383U (en) | A kind of charged state cue circuit | |
| CN209215467U (en) | Photovoltaic controller input electric cur- rent measure circuit | |
| CN202931003U (en) | Battery charging circuit and power supply circuit | |
| CN202150804U (en) | AC adjustable special-purpose power supply for electric power measuring | |
| CN204633416U (en) | A kind of solar-electricity pool controller | |
| CN206804840U (en) | Battery data logging device | |
| CN203645865U (en) | Photovoltaic LED street lamp system with auxiliary power supply | |
| CN205791567U (en) | A kind of grid-connected power distribution equipment of distributed photovoltaic | |
| CN108882474A (en) | A kind of list firewire soft-touch control | |
| CN104101810A (en) | Detection circuit based on LED unit and detector | |
| CN209435201U (en) | Power switch tube drives circuit | |
| CN204467312U (en) | Travelling charging knapsack with solar energy power accumulating pool controller | |
| CN209001628U (en) | The general power supply circuit of photovoltaic controller battery | |
| CN209088608U (en) | The total positive charging circuit of photovoltaic controller | |
| CN204859676U (en) | LED drive arrangement | |
| CN205901274U (en) | Novel battery over discharge protection circuit | |
| CN109495092A (en) | Power switch tube drives circuit and driving method | |
| CN204835677U (en) | Battery charging circuit that connects in parallel | |
| CN105450053B (en) | Gasoline engine parallel connection rectifying and pressure-regulating control circuit | |
| CN102751969B (en) | Output short-circuit protection circuit and method of low-power photovoltaic controller | |
| CN206300997U (en) | Charging detection device and charging detecting system | |
| CN204559509U (en) | A kind of solar power generation detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |