CN203588110U - Solar maximum power point tracking control circuit - Google Patents
Solar maximum power point tracking control circuit Download PDFInfo
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- CN203588110U CN203588110U CN201320720052.7U CN201320720052U CN203588110U CN 203588110 U CN203588110 U CN 203588110U CN 201320720052 U CN201320720052 U CN 201320720052U CN 203588110 U CN203588110 U CN 203588110U
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Abstract
The utility model relates to a solar maximum power point tracking control circuit. An anti-reflux circuit comprises a first MOS transistor and a first control module. The drain electrode of the first MOS transistor is connected to a first input negative electrode, a source electrode is connected to a first output negative electrode, and a gate is connected to the first control module. The first control module is further connected to a first input positive electrode, the first input negative electrode, a first output negative electrode and a first input positive electrode. The cathode of a fly-wheel diode is connected with a second output positive electrode and is connected to a second input positive electrode, and the anode is connected with the drain electrode of a second MOS transistor. One end of an inductor is connected to the second output negative electrode, and the other end is connected to the drain electrode of the second MOS transistor. The source electrode of the second MOS transistor is connected with the first output negative electrode and is connected to an internal public end. A second control module is connected to the gate and source electrode of the second MOS transistor. The solar maximum power point tracking control circuit is reasonable and reliable in design and low in cost.
Description
Technical field
The utility model relates to a kind of solar maximum power point follow-up control circuit.
Background technology
Solar maximum power point tracking control unit is called for short MPPT, and the electric energy that its role is to solar panels to produce takes out substantially and is transferred to load or is stored in accumulator with minimum loss.Its basic circuit form can, according to the difference of the height of the electromotive force of the output end voltage of solar panels and accumulator, be divided into BOOST (boosting) type, BUCK(step-down) type, BOOST-BUCK type and several large classes of CUK type.The MPPT circuit that is just core to the existing BUCK of take circuit is below illustrated.
Fig. 1 is the schematic diagram of a kind of BUCK of take circuit MPPT circuit that is core.Mark 22 represents a kind of typical BUCK circuit (buck DC transfer circuit), and mark 11 represents antireflux circuit.
Wherein, at BUCK circuit 2, comprise an input filter capacitor C101, play level and smooth surge current; One metal-oxide-semiconductor Q101, plays rectified action; One driver module MOD101, accepts to export to drive described metal-oxide-semiconductor to produce copped wave from the pwm signal of single-chip microcomputer; One sustained diode 102, forms discharge loop powering load or charge in batteries when discharging its energy storage at inductance; One inductance L 101 for energy storage when the described metal-oxide-semiconductor Q101 conducting, discharges the effect of its energy storage when metal-oxide-semiconductor turn-offs; One output filter capacitor C102, acts on similar with described input filter capacitor C101.As can be seen from the figure, input end and the output terminal of described driver module MOD101 do not have common port, and the current potential of node P4 fluctuates with pwm signal with respect to public terminal GND, and described driver module MOD101 itself also will have one with the driving power of node P4 point floating.Owing to there being special-purpose IC, it is not very difficult designing this driving circuit now.Problem is also will carry out level conversion and isolation transmission in the transmission of the internal signal of IC, and its result certainly leads to time delay and harmonic components and married again in the copped wave process of metal-oxide-semiconductor Q101, and this has increased the switching loss of metal-oxide-semiconductor Q101 undoubtedly.Also have that floating power supply, a commutation diode and a bootstrap capacitor, consists of, it is to lean on the fluctuation of the voltage that described node P4 orders to produce unsteady voltage to the charging of bootstrap capacitor; And floating voltage goes driven MOS pipe Q101 to produce copped wave output to conversely described driver module MOD101 power supply, described driver module MOD101 again.So just formed mutually and pind down.Once a certain link is out of joint between accidentally, metal-oxide-semiconductor Q101 just no longer includes copped wave output; Even if pwm signal is normal, the problem of described a certain link has disappeared can not recover output yet.Therefore, the reliability of sort circuit is also problematic.Moreover the price of application-specific integrated circuit is also high.The part that haves much room for improvement in original technology that Here it is.
Antireflux diode D101 in antireflux circuit 11 is that existing various types of MPPT circuit must have, its effect is the output voltage of solar panels PV101 when illumination is weak when also low than the electromotive force of accumulator BT101, stops the electric energy of BT101 to pour in down a chimney to PV101.But, when illumination normally makes it in conducting state.Due to its junction voltage (through survey conventionally all more than 1V through) existence make it produce extra loss.And this loss is to become to be similar to proportional relationship with the output current of solar panels.Be exemplified as card, suppose to have now the sun power plank of a 18V/3A will be to 12V/40AH charge in batteries.The peak power output of solar panels will be less than 18 * 3=54W.The power P that diode consumes
d=I * D
u>=3 * 1V=3W.Be converted into number percent and be also greater than 5.5%.This is also a no small numeral for solar powered system.Another place having much room for improvement in this original technology.
Utility model content
The purpose of this utility model is to overcome above shortcomings in prior art, and a kind of reasonable in design, reliable, solar maximum power point follow-up control circuit that cost is low is provided.
The technical scheme in the invention for solving the above technical problem is: a kind of solar maximum power point follow-up control circuit, comprises buck DC transfer circuit and antireflux circuit; Antireflux circuit is provided with the first input positive pole, the first input negative pole, the first output cathode, the first output negative pole, and buck DC transfer circuit is provided with the second input positive pole, the second input negative pole, the second output cathode, the second output negative pole; The first input is anodal for connecting the positive pole of solar panel, the first input negative pole is for connecting negative pole and the earth terminal of solar panel, the first output cathode is connected with the second input is anodal, the first output negative pole is connected and is connected to inner common port with the second input negative pole, the second output cathode is for connecting the positive pole of accumulator, and the second output negative pole is for connecting the negative pole of accumulator;
Described buck DC transfer circuit comprises the second metal-oxide-semiconductor, the second control module, input filter capacitor, output filter capacitor, fly-wheel diode, inductance;
Input filter capacitor positive pole is connected with the second input is anodal, and negative pole is connected with the second input negative pole; Output filter capacitor positive pole is connected with the second output cathode, and negative pole is connected with the second output negative pole;
It is characterized in that: described antireflux circuit comprises the first metal-oxide-semiconductor and the first control module; The drain electrode of described the first metal-oxide-semiconductor is connected with the first input negative pole, and source electrode is connected with the first output negative pole, and gate pole is connected with described the first control module; The first control module is also connected with described the first input positive pole, the first input negative pole, the first output cathode, the first output negative pole respectively;
The negative electrode of described fly-wheel diode is connected with the second input is anodal, and anode is connected with the drain electrode of the second metal-oxide-semiconductor; One end of described inductance is connected with output filter capacitor negative pole, and the other end is connected with the anode of fly-wheel diode; The source electrode of the second metal-oxide-semiconductor is connected with described the second input negative pole; The second control module is also connected with source electrode with the gate pole of the second metal-oxide-semiconductor respectively.
The first control module described in the utility model comprises the first triode, the first resistance, the second resistance, the first diode, the 3rd resistance, the 4th resistance, the second diode; The emitter of described the first triode is connected with the first input is anodal, and base stage is connected with the negative electrode of the first diode by the second resistance, and collector is connected with the negative electrode of the second diode with the gate pole of the first metal-oxide-semiconductor by the 3rd resistance; Between emitter and base stage, be parallel with the first resistance; The anode of the first diode is connected with the drain electrode of the first metal-oxide-semiconductor with the first input negative pole; The anode of described the second diode is connected and is connected to inner common port with the source electrode of the first metal-oxide-semiconductor; Between the collector of the first triode and the first output negative pole and be connected to the 4th resistance.
The second control module described in the utility model comprises driving circuit; Driving circuit is connected with source electrode with the gate pole of the second metal-oxide-semiconductor respectively; Described driving circuit has input power positive pole, input power negative pole, out-put supply negative pole.
Driving circuit described in the utility model comprises that a RC parallel circuit, the 2nd RC parallel circuit, the 3rd RC parallel circuit, the 3rd triode, the 8th resistance, half-bridge power promote circuit, and half-bridge power promotes circuit and comprises the 4th triode and the 5th triode; One end of a described RC parallel circuit and the 2nd RC parallel circuit is connected with the base stage of the 5th triode with the 3rd triode respectively; The collector of described the 3rd triode is connected with the base stage of the 4th triode by the 3rd RC parallel circuit; The collector of described the 4th triode is connected with the collector of described the 5th triode and jointly forms the output terminal that described half-bridge power promotes circuit; Between the emitter of described the 4th triode and base stage, be parallel with one the 8th resistance, it is anodal that the emitter of described the 4th triode has formed the input power of described driving circuit; The emitter of described the 5th triode is connected with the emitter of described the 3rd triode and jointly forms input power negative pole, the out-put supply negative pole of described driving circuit.
Driving circuit described in the utility model also comprises parallel circuit, the tenth resistance that the 6th electric capacity, the 9th resistance and the 3rd diode form; Between the input power positive pole of described driving circuit and input power negative pole, be parallel with the 6th electric capacity; The output terminal that described half-bridge power promotes circuit is connected with the gate pole of the second metal-oxide-semiconductor with the parallel circuit that the 3rd diode forms by the 9th resistance, and the negative electrode of the 3rd diode is connected with the output terminal that described half-bridge power promotes circuit; Between described the second metal-oxide-semiconductor gate pole and source electrode, be parallel with the tenth resistance.
Driving circuit described in the utility model comprises driving chip, drives chip to be connected with source electrode with the gate pole of the second metal-oxide-semiconductor; The positive source of driving chip has formed the input power positive pole of described driving circuit, and the power cathode of driving chip has formed input power negative pole, the out-put supply negative pole of described driving circuit.
Driving circuit described in the utility model also comprises parallel circuit, the tenth resistance that the 6th electric capacity, the 9th resistance and the 3rd diode form; Between the input power positive pole of described driving circuit and input power negative pole, be parallel with the 6th electric capacity; The output terminal of described driving chip is connected with the gate pole of the second metal-oxide-semiconductor with the parallel circuit that the 3rd diode forms by the 9th resistance, and the negative electrode of the 3rd diode is connected with the output terminal of described driving chip; Between described the second metal-oxide-semiconductor gate pole and source electrode, be parallel with the tenth resistance.
Utility model compared with prior art, has the following advantages and effect:
One, the voltage-dropping type DC/DC in existing MPPT (being BUCK) circuit has been carried out to modification one time, the position of some critical components wherein and topology have been done once to adjust, make than original the described driving that plays the second metal-oxide-semiconductor of copped wave effect, become very succinct, and can substitute with cheap discrete component, its outstanding advantage is the switching loss that has reduced the second metal-oxide-semiconductor, has improved the reliability of product; Next is the cost of raw material that has reduced product.
Two, by existing MPPT, be in the antireflux diode between solar panels anode and BUCK circuit input end positive pole, according to the flow direction of former incoming current, move to after the negative electrode of solar panels with the control element that the first metal-oxide-semiconductor is added a small amount of cheapness and substitute, make solar panels turn-off the first metal-oxide-semiconductor when illumination is weak, make it in unilateal conduction state, there will not be the situation of the anti-stream of electric current; When illumination is normal, the first metal-oxide-semiconductor can enter complete conducting state again, thereby reduces MPPT conduction loss in normal operation.Suppose to have now the sun power plank of a 18V/3A will be to 12V/40AH charge in batteries.The peak power output of solar panels will be less than 18*3=54W, the conducting resistance <0.03 Europe of the first metal-oxide-semiconductor, the power that the first metal-oxide-semiconductor consumes
p q =
i 2 * R q ≈ 0.27W, it is negligible being converted into number percent, therefore, although increased a small amount of cost with comparing before improvement, compares and is worth with the energy exchanging for.
Three, reduce the cost of raw material, improved again the reliability of efficiency and product.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of solar street lamp controller of having applied the MPPT circuit of prior art.
Fig. 2 is the circuit theory diagrams of having applied the solar street lamp controller of the utility model MPPT circuit.
Fig. 3 is the circuit diagram of solar street lamp controller of having applied the MPPT circuit of the utility model the first embodiment.
Fig. 4 is the circuit diagram of solar street lamp controller of having applied the MPPT circuit of the utility model the second embodiment.
Embodiment
Below in conjunction with accompanying drawing and by embodiment, the utility model is described in further detail, and following examples are to explanation of the present utility model and the utility model is not limited to following examples.
Referring to Fig. 2～Fig. 4, the utility model embodiment comprises buck DC transfer circuit 2, antireflux circuit 1; Buck DC transfer circuit 2 is also referred to as BUCK circuit.
It is anodal that antireflux circuit 1 is provided with the first input, the first input negative pole, the first output cathode, the first output negative pole, it is anodal that buck DC transfer circuit 2 is provided with the second input, the second input negative pole, the second output cathode, the second output negative pole, the anodal positive pole that connects solar panels PV of the first input, the first input negative pole connects the negative pole of solar panels PV, the first output cathode is connected with the second input is anodal, the first output negative pole is connected and is connected to inner public terminal GND with the second input negative pole, the second output cathode connects the positive pole of accumulator BT, the second output negative pole connects the negative pole of accumulator BT.
Buck DC transfer circuit 2 comprises the second metal-oxide-semiconductor Q306, the second control module MOD302, input filter capacitor, output filter capacitor, sustained diode 304, inductance L 301, sampling resistor R311.
Input filter capacitor comprises that the first capacitor C 301 and the second capacitor C 302, the first capacitor C 301 in parallel are polarity free capacitor, and the second capacitor C 302 is that electrochemical capacitor is in parallel.The positive pole of the second capacitor C 302 is connected with the second input is anodal, and negative pole is connected with the second input negative pole; The effect of the first capacitor C 301 is filtering radio-frequency components, in order to avoid MCU and signal amplification circuit are caused to interference, the surge current that the effect of the second capacitor C 302 produces while being level and smooth the second metal-oxide-semiconductor Q306 copped wave, so that the input impedance of described buck DC transfer circuit does not have large fluctuation.
Output filter capacitor comprises that the 7th capacitor C 307 and the 8th capacitor C 308, the seven capacitor C 307 are polarity free capacitor, and the 8th capacitor C 308 is electrochemical capacitor.The 7th capacitor C 307 and the 8th capacitor C 308 parallel connections, parallel circuit one end (positive pole of the 8th capacitor C 308) is connected with the second output cathode, and the other end (negative pole of the 8th capacitor C 308) is connected with the second output negative pole; The effect of this two electric capacity and the first capacitor C 301 and the second capacitor C 302 are similar, just make the output impedance of buck DC transfer circuit 2 not have large fluctuation here.
Sustained diode 304 is schottky diode.The negative electrode of sustained diode 304 is connected with the second input is anodal, and anode is connected with the drain electrode of the second metal-oxide-semiconductor Q306.
One end of inductance L 301 is connected with the second output negative pole with the negative pole of the 8th capacitor C 308, and the other end is connected with the drain electrode of the second metal-oxide-semiconductor Q306 with the anode of fly-wheel diode.The source electrode of the second metal-oxide-semiconductor Q306 is connected and is connected to GND with the second input negative pole.
Current sampling resistor R311 one end is connected with the second output cathode, and the other end is connected with the positive pole of accumulator BT.When daytime, solar panel PV was subject to solar radiation, electric current flows to the positive pole of accumulator BT by sampling resistor R311 from cell panel positive pole, then by inductance L 301, the second metal-oxide-semiconductor Q306, the first metal-oxide-semiconductor Q302, get back to the negative pole of solar panel PV from the negative pole of accumulator BT; During night, owing to not having the irradiation solar panel PV in time there is no electric energy output, the first metal-oxide-semiconductor Q302 and the second metal-oxide-semiconductor Q306 manage in closed condition, thereby make the electric energy of accumulator BT can instead not flow to solar panel PV.Now, built-in system MCU collects the signal that illumination dies down and makes load blocks MOD307 enter duty.
The second control module MOD302 comprises driving circuit, and driving circuit has input power positive pole, input power negative pole, out-put supply negative pole.
The utility model the first embodiment as shown in Figure 3, in present embodiment, driving circuit consists of discrete component, and it comprises that a RC parallel circuit, the 2nd RC parallel circuit, the 3rd RC parallel circuit, the 3rd triode Q303, the 8th resistance R 308, half-bridge power promote parallel circuit, the tenth resistance R 310 that circuit, the 6th capacitor C 306, the 9th resistance R 309 and the 3rd diode D303 form.
The one RC parallel circuit comprises the 3rd capacitor C 303 and the 5th resistance R 305 in parallel.The 2nd RC parallel circuit comprises the 4th capacitor C 304 and the 6th resistance R 306 in parallel.The 3rd RC parallel circuit comprises the 5th capacitor C 305 and the 7th resistance R 307 in parallel.The 4th triode Q304 and the 5th triode Q305 jointly form half-bridge power and promote circuit, and the collector of the 4th triode Q304 and the 5th triode Q305 is connected and has jointly formed the output terminal of half-bridge power promotion circuit.
One end of the one RC parallel circuit is connected with the PWM0 signal providing from system MCU outside the second control module MOD302, and the other end is connected with the base stage of the 3rd triode Q303; One end of the 2nd RC parallel circuit is connected with the PWM1 signal providing from system MCU outside the second control module MOD302, and the other end is connected with the base stage of the 5th triode Q305; One end of the 3rd RC parallel circuit is connected with the collector of the 3rd triode Q303, and the other end is connected with the base stage of the 4th triode Q304; It is anodal that the emitter of the 4th triode Q304 has formed the input power of driving circuit, between the base stage of the 4th triode Q304 and emitter, is parallel with one the 8th resistance R 308; The emitter of the 3rd triode Q303 and the 5th triode Q305 has formed driving circuit input power negative pole jointly; The output terminal that half-bridge power promotes circuit is connected with the gate pole of the second metal-oxide-semiconductor Q306 with the parallel circuit that the 3rd diode D303 forms by the 9th resistance R 309, and the 5th triode Q305 emitter is also connected and is connected to inner public terminal GND with the source electrode of the second metal-oxide-semiconductor Q306.Between the input power positive and negative electrode of driving circuit, be parallel with the 6th capacitor C 306.Between the second metal-oxide-semiconductor Q306 gate pole and ground connection public terminal GND, be connected with the tenth resistance R 310.
The one RC parallel circuit and the 2nd RC parallel circuit receive respectively the base stage of delivering to respectively again the 3rd triode Q303 and the 5th triode Q305 after the pwm signal of controlling with dead band of two-way from MCU, the 3rd triode Q303 passes to from its collector signal the base stage of the 4th triode Q304 again by the 3rd RC parallel circuit, the half-bridge power being comprised of the 4th triode Q304 and the 5th triode Q305 again promotes circuit and carries out power amplification, by it, export to the gate pole that parallel circuit that the 9th resistance R 309 and the 3rd diode D303 form is delivered to the second metal-oxide-semiconductor Q306, wherein, the 3rd capacitor C 303, the 4th capacitor C 304, the 5th capacitor C 305 is speed-up capacitors, to promote the precipitous degree on edge, square wave front and back.The 5th resistance R 305, the 6th resistance R 306, the 7th resistance R 307 are repeating resistances, play metering function.The 8th resistance R 308 is pull-up resistors, works to accelerate the 4th triode Q304 and closes.The 4th triode Q304 plays signal transmission and level conversion.The 6th capacitor C 306 plays power filter.The effect of the 9th resistance R 309 and the 3rd diode D303 is the oscillator signal that sup.G electric capacity produces, in order to avoid copped wave is formed and disturbs the loss that reduces metal-oxide-semiconductor.The pwm signal that two-way band dead band is controlled is to prevent that half-bridge power from promoting the back of the body of the bridge up and down conducting simultaneously of circuit and increase loss and even burn half-bridge; The tenth resistance R 310 is while preventing that output terminal that half-bridge power promotes circuit from entering floating dummy status and make the second metal-oxide-semiconductor Q306 out of control.
The utility model the second embodiment as shown in Figure 4, in present embodiment, driving circuit consists of integrated circuit (IC), and it comprises parallel circuit, the tenth resistance R 310 that drives chip IC 401, the 6th capacitor C 306, the 9th resistance R 309 and the 3rd diode D303 to form.Drive the input end of chip IC 401 to be connected with the pwm signal providing from system MCU outside the second control module, output terminal is connected with the gate pole of the second metal-oxide-semiconductor Q306 with the parallel circuit that the 3rd diode D303 forms by the 9th resistance R 309, and the negative electrode of the 3rd diode D303 is connected with driving the output terminal of chip IC 401.Between the second metal-oxide-semiconductor Q306 gate pole and source electrode, be parallel with the tenth resistance R 310.Drive chip IC 401 to be also connected with the source electrode of the second metal-oxide-semiconductor Q306.Be parallel with the 6th capacitor C 306 driving between the input power positive pole of chip IC 401 and input power negative pole.In the present embodiment, except described driving circuit is with driving chip IC 401 to replace the driving circuit shown in Fig. 3, other circuit is all identical with the first embodiment; Circuit is through so converting by actual measurement and also reached same effect.The positive source of driving chip IC 401 has formed the input power positive pole of described driving circuit, and the power cathode of driving chip has formed input power negative pole, the out-put supply negative pole of described driving circuit.
MPPT circuit described in the utility model also comprises and falls formula D.C. regulated power supply functional module MOD303, MOD304.MOD303 input anode is connected with the collector of the first triode Q301, output terminal VDD is connected with the power positive end of the driving circuit of the second metal-oxide-semiconductor Q306, its inner input, output negative pole are connected with the inside public terminal GND of system, and effect is to provide electric energy for driving circuit.
When the output voltage of the solar panels PV minimum cut-in voltage lower than 0.4V(the first triode emitter junction) the voltage stabilizing value of+12.5V(the second diode D302) time, the first triode Q301 will will be in closed condition because losing biasing; The gate pole of the first metal-oxide-semiconductor Q302 is closed losing voltage because of closing of the first triode Q301 and discharging over the ground its static charge by the 3rd resistance R 303 and the 4th resistance R 304, is in the unilateal conduction state of the body diode of himself; Now, will not have electric current oppositely to flow into solar panels PV phenomenon from accumulator BT.Power supply function module MOD303 will be because not having input voltage to stop output, and now MPPT has not just in time needed work yet.When the output voltage of solar panels PV is greater than the minimum cut-in voltage of 0.4V(the first triode Q301 emitter junction) the voltage stabilizing value of+12.5V(the second diode D302) time, the first triode Q301 will be in amplifying or opening state, now, because the output voltage of solar panels PV is greater than the electromotive force of accumulator BT, by known the first metal-oxide-semiconductor Q302 of superposition principle, what state not have reverse battery in and flow into solar panels PV; And when the output voltage of solar panels PV is enough high, the first triode Q301 will be completely saturated, make the first metal-oxide-semiconductor Q302 when complete conducting state, power supply function module MOD303 or Q306 therefore also will obtain sufficiently high input voltage and stable output voltage to described drive circuitry.MCU in system and other functional module all will be changed awake.Circuit now will enter MPPT duty.
MOD305 is analog acquisition, amplification and processing module, for amplifying and process and sample for micro-control unit MCU coming from sampling resistor R311 and other electric current and voltage signal everywhere.MOD306 is the micro-control unit (MCU) of system, for the various analog quantitys of gathering being transformed into digital quantity in addition computing, analysis, processing produce pwm signal, to supply with the driving circuit of described the second control module, driving circuit carries out this signal by output terminal, being added to after power amplification the gate pole of the second metal-oxide-semiconductor Q306 again, makes metal-oxide-semiconductor produce copped wave and exports to reach the object to the MPPT maximum power point tracking of accumulator and Charge Management.MOD304 is low-voltage power supply generation module, in order to give MOD305 and MOD306 power supply.MOD307 is LED drive control module (the namely load of system), in order to accept the control signal of MCU, to realize, opens, turn-offs and regulate the function of LED brightness and the object of electric discharge management.Because these modules are not innovative points of the present utility model, do not elaborate here.
In addition, it should be noted that, the specific embodiment described in this instructions, the shape of its parts and components, institute's title of being named etc. can be different, and the above content described in this instructions is only to the explanation of the utility model structure example.
Claims (7)
1. a solar maximum power point follow-up control circuit, comprises buck DC transfer circuit and antireflux circuit; Antireflux circuit is provided with the first input positive pole, the first input negative pole, the first output cathode, the first output negative pole, and buck DC transfer circuit is provided with the second input positive pole, the second input negative pole, the second output cathode, the second output negative pole; The first input is anodal for connecting the positive pole of solar panel, the first input negative pole is for connecting negative pole and the earth terminal of solar panel, the first output cathode is connected with the second input is anodal, the first output negative pole is connected and is connected to inner common port with the second input negative pole, the second output cathode is for connecting the positive pole of accumulator, and the second output negative pole is for connecting the negative pole of accumulator;
Described buck DC transfer circuit comprises the second metal-oxide-semiconductor, the second control module, input filter capacitor, output filter capacitor, fly-wheel diode, inductance;
Input filter capacitor positive pole is connected with the second input is anodal, and negative pole is connected with the second input negative pole; Output filter capacitor positive pole is connected with the second output cathode, and negative pole is connected with the second output negative pole;
It is characterized in that: described antireflux circuit comprises the first metal-oxide-semiconductor and the first control module; The drain electrode of described the first metal-oxide-semiconductor is connected with the first input negative pole, and source electrode is connected with the first output negative pole, and gate pole is connected with described the first control module; The first control module is also connected with described the first input positive pole, the first input negative pole, the first output cathode, the first output negative pole respectively;
The negative electrode of described fly-wheel diode is connected with the second input is anodal, and anode is connected with the drain electrode of the second metal-oxide-semiconductor; One end of described inductance is connected with output filter capacitor negative pole, and the other end is connected with the anode of fly-wheel diode; The source electrode of the second metal-oxide-semiconductor is connected with described the second input negative pole; The second control module is also connected with source electrode with the gate pole of the second metal-oxide-semiconductor respectively.
2. solar maximum power point follow-up control circuit according to claim 1, is characterized in that: the first described control module comprises the first triode, the first resistance, the second resistance, the first diode, the 3rd resistance, the 4th resistance, the second diode; The emitter of described the first triode is connected with the first input is anodal, and base stage is connected with the negative electrode of the first diode by the second resistance, and collector is connected with the negative electrode of the second diode with the gate pole of the first metal-oxide-semiconductor by the 3rd resistance; Between emitter and base stage, be parallel with the first resistance; The anode of the first diode is connected with the drain electrode of the first metal-oxide-semiconductor with the first input negative pole; The anode of described the second diode is connected and is connected to inner common port with the source electrode of the first metal-oxide-semiconductor; Between the collector of the first triode and the first output negative pole and be connected to the 4th resistance.
3. solar maximum power point follow-up control circuit according to claim 1, is characterized in that: the second described control module comprises driving circuit; Driving circuit is connected with source electrode with the gate pole of the second metal-oxide-semiconductor respectively; Described driving circuit has input power positive pole, input power negative pole, out-put supply negative pole.
4. solar maximum power point follow-up control circuit according to claim 3, it is characterized in that: described driving circuit comprises that a RC parallel circuit, the 2nd RC parallel circuit, the 3rd RC parallel circuit, the 3rd triode, the 8th resistance, half-bridge power promote circuit, and half-bridge power promotes circuit and comprises the 4th triode and the 5th triode; One end of a described RC parallel circuit and the 2nd RC parallel circuit is connected with the base stage of the 5th triode with the 3rd triode respectively; The collector of described the 3rd triode is connected with the base stage of the 4th triode by the 3rd RC parallel circuit; The collector of described the 4th triode is connected with the collector of described the 5th triode and jointly forms the output terminal that described half-bridge power promotes circuit; Between the emitter of described the 4th triode and base stage, be parallel with one the 8th resistance, it is anodal that the emitter of described the 4th triode has formed the input power of described driving circuit; The emitter of described the 5th triode is connected with the emitter of described the 3rd triode and jointly forms input power negative pole, the out-put supply negative pole of described driving circuit.
5. solar maximum power point follow-up control circuit according to claim 4, is characterized in that: described driving circuit also comprises parallel circuit, the tenth resistance that the 6th electric capacity, the 9th resistance and the 3rd diode form; Between the input power positive pole of described driving circuit and input power negative pole, be parallel with the 6th electric capacity; The output terminal that described half-bridge power promotes circuit is connected with the gate pole of the second metal-oxide-semiconductor with the parallel circuit that the 3rd diode forms by the 9th resistance, and the negative electrode of the 3rd diode is connected with the output terminal that described half-bridge power promotes circuit; Between described the second metal-oxide-semiconductor gate pole and source electrode, be parallel with the tenth resistance.
6. solar maximum power point follow-up control circuit according to claim 3, is characterized in that: described driving circuit comprises driving chip, drives chip to be connected with source electrode with the gate pole of the second metal-oxide-semiconductor; The positive source of driving chip has formed the input power positive pole of described driving circuit, and the power cathode of driving chip has formed input power negative pole, the out-put supply negative pole of described driving circuit.
7. solar maximum power point follow-up control circuit according to claim 6, is characterized in that: described driving circuit also comprises parallel circuit, the tenth resistance that the 6th electric capacity, the 9th resistance and the 3rd diode form; Between the input power positive pole of described driving circuit and input power negative pole, be parallel with the 6th electric capacity; The output terminal of described driving chip is connected with the gate pole of the second metal-oxide-semiconductor with the parallel circuit that the 3rd diode forms by the 9th resistance, and the negative electrode of the 3rd diode is connected with the output terminal of described driving chip; Between described the second metal-oxide-semiconductor gate pole and source electrode, be parallel with the tenth resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320720052.7U CN203588110U (en) | 2013-11-15 | 2013-11-15 | Solar maximum power point tracking control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320720052.7U CN203588110U (en) | 2013-11-15 | 2013-11-15 | Solar maximum power point tracking control circuit |
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| CN203588110U true CN203588110U (en) | 2014-05-07 |
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| CN201320720052.7U Withdrawn - After Issue CN203588110U (en) | 2013-11-15 | 2013-11-15 | Solar maximum power point tracking control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616923A (en) * | 2013-11-15 | 2014-03-05 | 宁波耀泰电器有限公司 | Solar energy maximum power point tracking control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616923A (en) * | 2013-11-15 | 2014-03-05 | 宁波耀泰电器有限公司 | Solar energy maximum power point tracking control circuit |
| CN103616923B (en) * | 2013-11-15 | 2015-05-20 | 宁波耀泰电器有限公司 | Solar energy maximum power point tracking control circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140507 Effective date of abandoning: 20150520 |
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| RGAV | Abandon patent right to avoid regrant |