CN204258690U - A kind of photovoltaic water-raising system - Google Patents
A kind of photovoltaic water-raising system Download PDFInfo
- Publication number
- CN204258690U CN204258690U CN201420750991.0U CN201420750991U CN204258690U CN 204258690 U CN204258690 U CN 204258690U CN 201420750991 U CN201420750991 U CN 201420750991U CN 204258690 U CN204258690 U CN 204258690U
- Authority
- CN
- China
- Prior art keywords
- water
- circuit
- control chip
- photovoltaic
- motor
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The utility model provides a kind of photovoltaic water-raising system, by utilizing solar cell array, solar energy is directly transformed into electric energy.Three-phase alternating voltage is exported after boosting, frequency conversion; drive motors and water pump load; complete to water tower water storage; comprise photovoltaic water-raising controller; photovoltaic array, water pump, motor, photovoltaic water-raising controller comprises: control chip, power conditioning circuitry, three-phase inverter bridge circuit, drive circuit, three opposite potential zero cross detection circuits, voltage detecting circuit, current detection circuit, current foldback circuit, beat dry protective circuit.
Description
Technical field
The utility model relates to one and utilizes new forms of energy to carry out water intake system, is specially a kind of photovoltaic water-raising system.
Background technology
Growing along with social production, constantly increase the demand of the energy, the energy crisis in global range also becomes increasingly conspicuous.Fossil energy in the earth is limited, can be consumed totally one day.Along with the minimizing of fossil energy, its price also can improve, and this seriously will restrict the development of production and the raising of living standards of the people.Therefore the application of solar energy generation technology more and more comes into one's own, and clean solar energy becomes the alternative energy source of regeneration.
Solar photovoltaic water pump is more and more confirmed as sunlight district galore in the world today by people in recent years, especially short of electricity is without the water supply means of the outlying district most attraction of electricity, utilizes desirable and inexhaustible solar energy resources to realize the water supply of high economy and high reliability everywhere.Water pump automatically begins work at sunrise, sunset and having a rest, and keep an eye on without the need to personnel, maintenance workload can be down to minimum, is green energy resource high-tech product that is desirable, economic, reliable and environmental benefit.
Utility model content
The purpose of this utility model overcomes existing energy shortage problem thus causes outlying district to irrigate scarce capacity, providing a kind of photovoltaic water-raising system, by utilizing solar cell array, solar energy being directly transformed into electric energy.After boosting, frequency conversion, export three-phase alternating voltage, drive motors and water pump load, complete to water tower water storage.
Technical solution adopted in the utility model is such: a kind of photovoltaic water-raising system, comprises photovoltaic water-raising controller, electricly connects respectively with described photovoltaic water-raising controller:
Photovoltaic array, for converting solar energy into electrical energy; Water pump, for pumping up water; Motor, described motor is direct current permanent magnetic brushless motor, for driving described water pump;
It is characterized in that: described photovoltaic water-raising controller comprises:
Control chip; Described control chip is connected with described photovoltaic array, gathers the voltage and current that described photovoltaic array exports;
Power conditioning circuitry; Described power conditioning circuitry electricly connects with described control chip and described photovoltaic array respectively, for making described photovoltaic array Maximum Power Output;
Three-phase inverter bridge circuit, the output of described three-phase inverter bridge circuit and described power conditioning circuitry electricly connects, the output of described three-phase inverter bridge circuit electricly connects with the three-phase of described motor respectively, becomes three-phase alternating current for the DC conversion exported by described photovoltaic array;
Drive circuit, described drive circuit connects described control chip and described three-phase inverter bridge circuit respectively, and described control chip drives the power device of described three-phase inverting circuit by described drive circuit;
Three opposite potential zero cross detection circuits, described three opposite potential zero passage detection electricity are connected with described control chip and described motor respectively, for detecting motor rotor position, obtain commutation information accurately;
Voltage detecting circuit, described voltage detecting circuit and described control chip electricly connect;
Current detection circuit, described current detection circuit and described control chip electricly connect;
Current foldback circuit, described current foldback circuit is connected with described motor with described control chip respectively, for the protection of described motor;
Beat dry protective circuit, describedly beat dry protective circuit and be connected with described motor with described control chip respectively, for sensed water level, control motor start and stop.
Further, described control chip is PIC16F877A single-chip microcomputer, and on PIC16F877A single-chip microcomputer pin, the pulse-width signal of output pulse width and frequency-adjustable realizes the rotating speed control of motor.
Further, described power conditioning circuitry is DC/DC booster circuit.
Further, described three-phase inverter bridge circuit is the full-controlled bridge circuit of star winding connection, VT1, VT2, VT3, VT4, VT5, VT6 feels ashamed to have MOSET pipe and the fast recovery diode that winding opens turn-off capacity respectively, MOSET pipe is IRF840, VT1, VT3, VT5 is upper brachium pontis, VT4, VT6, VT2 is lower brachium pontis, upper brachium pontis VT1, VT3, the drain electrode of the MOSET switching tube of VT5 is connected to the positive pole of power conditioning circuitry output jointly, lower brachium pontis VT4, VT6, the source class of the MOSET switching tube of VT2 is connected with the negative pole of power conditioning circuitry output, the output of drive circuit is connected on the grid of MOSET switching tube.
Further, described drive circuit is IR2130 grid drive chip, and the pwm signal that described control chip produces inputs to IR2130 grid drive chip, through power amplification rear drive described in the MOSET pipe of three-phase inverter bridge circuit.
Further, three opposite potential zero cross detection circuits are by comparator LM339 and peripheral circuit back-emf zero-crossing examination thereof.
Further, described current foldback circuit comprises: sampling resistor, and sampling resistor converts current signal to voltage signal; Signal amplifier LF353, for amplification voltage signal; Comparator LM339, for by amplify after voltage signal compared with the overcurrent value of setting, NAND gate CD4011, for blocking the input signal of MOSFET.
Further, describedly beat dry protective circuit and comprise three wire WH, CM, WL is connected in water, the water level at WH place is the highest, the water level of WL is placed in the middle, CM is that common port is at lowermost end, WH connects+12V voltage, if the water level in well is more than WH, then pass through the direct conducting of water between WH and CM, + 12V voltage makes 7 pin of LM358 export high level through electric resistance partial pressure, l pin exports high level, make optocoupler OPTOISO1 conducting, control chip detects high level, when water level decreasing is to below WH, because now optocoupler conducting, so CM and WL is still by water conducting, the dividing potential drop result of+12V still makes 7 pin of LM324 export high, 1 pin still exports high level, the level signal of giving control chip is constant, when water level continues to drop to below WL, CM and WL disconnects, the voltage step-down of CM end, 7 pin of LM324 are made to export as low level, 1 pin exports step-down, light lotus root OPTOISO1 closes, control chip detect low level represent at this moment water economy-combat do, need to shut down retaining, after shutting down a period of time, water level can rise gradually, when water level rises to WL, optocoupler still not conducting, control chip still can detect low level, until when water level rises to WH, optocoupler is conducting again, single-chip microcomputer just can detect that high level WL is the water level that water pump is shut down, and WH is the water level of water pump start, a water-head is there is between WH and WL, form the stagnant ring of water level detecting.
The beneficial effects of the utility model are: photovoltaic array is energy resource supply part, it can be converted into electric energy solar energy, the power output be made up of 24 Monocrystalline silicon cell piece that the utility model adopts is the solar components of 48W, photovoltaic water-raising controller comprises DC/DC booster circuit, PIC16F877A single-chip microcomputer, power conditioning circuitry, three-phase inverting circuit and overcurrent, beat dry protective circuit, export three-phase alternating voltage drive motors and pump working, the direct current permanent magnetic brushless motor of the YP112 series that described motor selects Texas Instrument to provide, the structure that this permanent-magnetic brush-less DC motor had both had alternating current motor is simple, reliable, the series of advantages such as easy to maintenance, the operational efficiency again with common DC motor is high, the plurality of advantages such as the little and good speed adjustment features of excitation loss, positive displacement positive displacement water pump selected by described water pump, it is not very large that this water pump is applicable to power, higher but the water-raising system that flow is less of lift that user requires, this system is without the need to electrical network, install simple, begin work at sunrise, sunset and having a rest, without the need to personnel control and malfunction monitoring, select DC brushless motor as drive motors, peripheral circuit is simple, system run all right, the TMPPT of photovoltaic array working point follows the tracks of and selects modified model variable step method of addition, thus substantially increase the operating efficiency of system.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of photovoltaic water-raising system of the present utility model;
Fig. 2 is the hardware composition frame chart of photovoltaic water-raising system of the present utility model;
Fig. 3 is the peripheral circuit diagram of the control chip of photovoltaic water-raising system of the present utility model;
Fig. 4 is the circuit diagram of the three-phase inverter bridge circuit of photovoltaic water-raising system of the present utility model;
Fig. 5 is the circuit diagram beating dry protective circuit of photovoltaic water-raising system of the present utility model;
Fig. 6 is the schematic diagram playing dry protection of photovoltaic water-raising system of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in figs 1 to 6, a kind of photovoltaic water-raising system of the utility model system, comprises photovoltaic water-raising controller, electricly connects respectively with photovoltaic water-raising controller:
Photovoltaic array, for converting solar energy into electrical energy; Water pump, for pumping up water; Motor, motor is direct current permanent magnetic brushless motor, for driving water pump;
Photovoltaic water-raising controller comprises: control chip; Control chip is connected with photovoltaic array, gathers the voltage and current that photovoltaic array exports;
Power conditioning circuitry; Power conditioning circuitry electricly connects with control chip and photovoltaic array respectively, for making photovoltaic array Maximum Power Output;
Three-phase inverter bridge circuit, the output of three-phase inverter bridge circuit and power conditioning circuitry electricly connects, and the output of three-phase inverter bridge circuit electricly connects with the three-phase of motor respectively, becomes three-phase alternating current for the DC conversion exported by photovoltaic array;
Drive circuit, drive circuit is connection control chip and three-phase inverter bridge circuit respectively, and control chip drives the power device of three-phase inverting circuit by drive circuit;
Three opposite potential zero cross detection circuits, three opposite potential zero passage detection electricity are connected with control chip and motor respectively, for detecting motor rotor position, obtain commutation information accurately;
Voltage detecting circuit, voltage detecting circuit and control chip electricly connect;
Current detection circuit, current detection circuit and control chip electricly connect;
Current foldback circuit, current foldback circuit is connected with motor with control chip respectively, for the protection of motor;
Beat dry protective circuit, beat dry protective circuit and be connected with motor with control chip respectively, for sensed water level, control motor start and stop.
Control chip is PIC16F877A single-chip microcomputer, and on PIC16F877A single-chip microcomputer pin, the pulse-width signal of output pulse width and frequency-adjustable realizes the rotating speed control of motor.
Power conditioning circuitry is DC/DC booster circuit.
Three-phase inverter bridge circuit is the full-controlled bridge circuit of star winding connection, VT1, VT2, VT3, VT4, VT5, VT6 feels ashamed to have MOSET pipe and the fast recovery diode that winding opens turn-off capacity respectively, MOSET pipe is IRF840, VT1, VT3, VT5 is upper brachium pontis, VT4, VT6, VT2 is lower brachium pontis, upper brachium pontis VT1, VT3, the drain electrode of the MOSET switching tube of VT5 is connected to the positive pole of power conditioning circuitry output jointly, lower brachium pontis VT4, VT6, the source class of the MOSET switching tube of VT2 is connected with the negative pole of power conditioning circuitry output, the output of drive circuit is connected on the grid of MOSET switching tube.
Drive circuit is IR2130 grid drive chip, and the pwm signal that control chip produces inputs to IR2130 grid drive chip, manages through the MOSET of the rear drive three-phase inverter bridge circuit of power amplification.
Three opposite potential zero cross detection circuits are by comparator LM339 and peripheral circuit back-emf zero-crossing examination thereof.
Current foldback circuit comprises: sampling resistor, and sampling resistor converts current signal to voltage signal; Signal amplifier LF353, for amplification voltage signal; Comparator LM339, for by amplify after voltage signal compared with the overcurrent value of setting, NAND gate CD4011, for blocking the input signal of MOSFET.
Beat dry protective circuit and comprise three wire WH, CM, WL is connected in water, the water level at WH place is the highest, the water level of WL is placed in the middle, CM is that common port is at lowermost end, WH connects+12V voltage, if the water level in well is more than WH, then pass through the direct conducting of water between WH and CM, + 12V voltage makes 7 pin of LM358 export high level through electric resistance partial pressure, l pin exports high level, make optocoupler OPTOISO1 conducting, control chip detects high level, when water level decreasing is to below WH, because now optocoupler conducting, so CM and WL is still by water conducting, the dividing potential drop result of+12V still makes 7 pin of LM324 export high, 1 pin still exports high level, the level signal of giving control chip is constant, when water level continues to drop to below WL, CM and WL disconnects, the voltage step-down of CM end, 7 pin of LM324 are made to export as low level, 1 pin exports step-down, light lotus root OPTOISO1 closes, control chip detect low level represent at this moment water economy-combat do, need to shut down retaining, after shutting down a period of time, water level can rise gradually, when water level rises to WL, optocoupler still not conducting, control chip still can detect low level, until when water level rises to WH, optocoupler is conducting again, single-chip microcomputer just can detect that high level WL is the water level that water pump is shut down, and WH is the water level of water pump start, a water-head is there is between WH and WL, form the stagnant ring of water level detecting.
The utility model can utilize cleanliness without any pollution energy solar energy to solve the shortage of water problem of remote districts, realize the surface irrigation such as drip irrigation and spray irrigation, infiltrating irrigation, this system, without the need to electrical network, is installed simple, is beginned work at sunrise, sunset and having a rest, without the need to personnel control and malfunction monitoring, select DC brushless motor as drive motors, peripheral circuit is simple, system run all right, the TMPPT of photovoltaic array working point follows the tracks of and selects modified model variable step method of addition, thus substantially increases the operating efficiency of system; Software is selected single-chip microcomputer PIC16F877 as the main control chip of system, there is stronger data process&analysis ability.
As the hardware composition frame chart that Fig. 2 is photovoltaic water-raising system of the present utility model, its course of work is as follows: the output of photovoltaic battery array connects with DC/DC booster circuit, single-chip microcomputer makes the judgement of whether under-voltage overcurrent by the magnitude of voltage of Bian light harvesting photovoltaic array bus and current value, if the data fit condition collected, the increment moving direction changing voltage according to MPPT algorithm is adjusted the duty ratio of pwm signal by single-chip microcomputer, drive the power tube conducting of DC-DC booster circuit, this part completes MPPT maximum power point tracking and controls, the output of power conditioning circuitry is connected with three-phase inversion bridge circuit, the pwm control signal of single-chip microcomputer controls conducting and the shutoff of six switching tubes of inverter bridge by the power driving circuit be made up of IR2130, UVW three-phase alternate conduction is made to make motor rotation, constantly by three opposite potential zero cross detection circuit detection rotor positions during motor rotation, obtain commutation information accurately, photovoltaic water-raising system designed system defencive function of the present utility model comprises overcurrent protection, play dry protection, according to the operation logic of DC brushless motor, the running of motor can be controlled by the disconnection of three-phase six status circuit that is made up of 6 power tubes and conducting, and maximum power point of photovoltaic array is followed the tracks of, then realized by the duty ratio D of change DC-DC booster circuit.
(1) power conditioning circuitry major function optimizes the output voltage-electric current of motor and water pump system, and realize the object that photovoltaic system runs on maximum power point, when intensity of illumination weakens, photovoltaic array output voltage remains unchanged substantially, and output current value can correspondingly equal proportion decline, but for pump system, along with the drop-out voltage of electric current also can correspondingly decline, therefore, the design of power conditioning circuitry can delay the operating voltage of photovoltaic array and electric current declines with intensity of illumination and departs from the degree of maximum power point, due to when starting, instantaneous velocity and the back electromotive force of motor are zero, now, the excess voltage that photovoltaic system exports can be converted to electric current by DC/DC booster circuit effectively, the output of photovoltaic battery array connects with Boost, the magnitude of voltage of single-chip microcomputer Bian light harvesting photovoltaic array bus and current value thus make the judgement of whether under-voltage overcurrent, if the data collected are eligible, single-chip microcomputer will change the increment moving direction of voltage thus the duty ratio of adjustment pwm signal according to MPPT algorithm, the power tube conducting of DC-DC booster circuit is driven by adjustment duty ratio, thus complete MPPT maximum power point tracking control.
(2) single-chip microcomputer, is shown in Fig. 3, and single-chip microcomputer makes the judgement of whether under-voltage overcurrent by the magnitude of voltage of Bian light harvesting photovoltaic array bus and current value, and the rotating speed that the pulse-width signal of output pulse width and frequency-adjustable realizes motor from single-chip microcomputer pin controls.
(3) three-phase inverter bridge circuit, see Fig. 4, three-phase inverter bridge circuit is connected with the output of power conditioning circuitry, IR2130 forms power driving circuit, the pwm control signal of single-chip microcomputer controls conducting and the shutoff of six MOSET pipes by this drive circuit, UVW three-phase alternate conduction is made to make motor rotation, constantly by three opposite potential zero cross detection circuit detection rotor positions during motor rotation, obtain commutation information accurately, this partial circuit as shown in Figure 3, three-phase inverter bridge circuit is the full-controlled bridge circuit of star winding connection, VT1, VT2, VT3, VT4, VT5, VT6 feels ashamed to have MOSET pipe and the fast recovery diode that winding opens turn-off capacity respectively, and MOSET pipe is IRF840, VT1, VT3, VT5 is upper brachium pontis, VT4, VT6, VT2 is lower brachium pontis, upper brachium pontis VT1, VT3, the drain electrode of the MOSET switching tube of VT5 is connected to the positive pole of power conditioning circuitry output jointly, lower brachium pontis VT4, VT6, the source class of the MOSET switching tube of VT2 is connected with the negative pole of power conditioning circuitry output, and the output of drive circuit is connected on the grid of MOSET switching tube, from three wire U that three-phase is drawn respectively, V, W is connected on DC brushless motor to drive water pump to move after back electromotive force zero cross detection circuit, this photovoltaic water-raising system adopts IRF840 to manage as MOSET, it be IR company release the 8th generation MOSFET element, its manufacturing process is advanced, in low power electric machine control system, can drive motors effectively.
(4) drive circuit, because the pwm signal voltage exported by single-chip processor i/o port cannot reach the driving voltage needed for MOSFET work, therefore needs to add the drive circuit with power amplification function between the I/O port and power bridge of controller.
Be made up of IR2130 and peripheral auxiliary circuits, IR2130 is that IR company produces, the high-grade drives device that three-phase bridge drives function can be realized, he disturbs COMS manufacturing process in conjunction with HVIC technology and door lock, its inside has upper brachium pontis suspension boostrap circuit, this technology can reduce the power supply number of drive circuit to a certain extent, the drive current peak value of the upper and lower brachium pontis of IR2130 is respectively 250mA and 500mA, for the three-phase inverter bridge circuit involved by the utility model, Jin Xu mono-road driving power just can complete the driving to 6 MOSET pipes.
The pwm signal produced by single-chip microcomputer inputs to IR2130, and the pwm signal after power amplification can drive the MOSET of three-phase inverter bridge circuit to manage.
(5) current foldback circuit, photovoltaic water-raising system of the present utility model comprises plays dry protection overcurrent protection, DC brushless motor in system is when just starting, rotating speed is very low, and phase current is now very large, the damage of motor can be caused, overcurrent protection therefore must be adopted to suppress the overcurrent of winding, current foldback circuit as shown in Figure 6, bus current sampling resistor is directly connected on the N of DC bus, resistance converts the current signal flowing through bus to voltage signal, in order to be reduced in power consumption on sampling resistor, selected sampling resistor resistance is usually very little, therefore the voltage signal after conversion is very low, need to adopt signal amplifier LF353 to amplify this voltage signal, voltage signal after amplification at 4 ends of comparator LM339 compared with the overcurrent value set by user, if the current value detected is greater than the overcurrent value set by user, then comparator LM339 is by output low level, because CD40ll below adopts+5V to power, so need to adopt+5V pull-up resistor to carry out level match, the 10 pin output low levels of CD4011, by diode D18,12 pin of 4081 are directly pulled into low level, the input signal of direct blockade power MOSFET, when the current value of circuit recovers normally, 10 pin of CD4011 will export high level, due to the existence of electric capacity C27, need during high level to charge to electric capacity C27, 12 pin of CD4On just can be made after a while to be high level, remove the blockade to power device, this makes power device recover normally at electric current, time delay a period of time could open, C27 in circuit, D18 and R34 forms monostable trigger-action circuit, this can prevent circuit at set mistake flow point oscillate, therefore this circuit is when overcurrent, circuit can switch-off power MOSFET immediately: when electric current recover normal after, be not open power MOSFET immediately, but time delay a period of time makes the electric current in circuit return to normal value.
(6) Fig. 5 is seen, Fig. 6, the effect of beating dry protective circuit is when photovoltaic water pump system running hours, water pump is drawing water for a long time, Water table in well likely can be caused constantly to decline, when the water level of well water is lower than water pump vane height, water pump is not only drawing water, and brushless electric machine can be damaged because of idle running, therefore need to design and special drain protective circuit, beat dry protective circuit and comprise three wire WH, CM, WL is connected in water, the water level at WH place is the highest, the water level of WL is placed in the middle, CM is that common port is at lowermost end, WH connects+12V voltage, if the water level in well is more than WH, then pass through the direct conducting of water between WH and CM, + 12V voltage makes 7 pin of LM358 export high level through electric resistance partial pressure, l pin exports high level, make optocoupler OPTOISO1 conducting, control chip detects high level, when water level decreasing is to below WH, because now optocoupler conducting, so CM and WL is still by water conducting, the dividing potential drop result of+12V still makes 7 pin of LM324 export high, 1 pin still exports high level, the level signal of giving control chip is constant, when water level continues to drop to below WL, CM and WL disconnects, the voltage step-down of CM end, 7 pin of LM324 are made to export as low level, 1 pin exports step-down, light lotus root OPTOISO1 closes, control chip detect low level represent at this moment water economy-combat do, need to shut down retaining, after shutting down a period of time, water level can rise gradually, when water level rises to WL, optocoupler still not conducting, control chip still can detect low level, until when water level rises to WH, optocoupler is conducting again, single-chip microcomputer just can detect that high level WL is the water level that water pump is shut down, and WH is the water level of water pump start, a water-head is there is between WH and WL, form the stagnant ring of water level detecting, in order to avoid when water level fluctuates up and down, cause the frequent switch of motor.
(7) three opposite potential zero cross detection circuits are by comparator LM339 and peripheral circuit back-emf zero-crossing examination thereof, because the level of PIC16F877A single-chip microcomputer input pin is+5V to the maximum, and LM339 adopts the power supply of+12V to drive, the level of the two does not mate, so need to connect a right+5V power supply of resistance at the output pin of LM339 to carry out pull-up, the output level of LM339 produces saltus step when back-emf zero crossing arrives, that is to detect and namely the moment capturing voltage comparator LM339 level generation saltus step is capture motor winding back-emf zero crossing, use the I/O Port interrupts function that PIC16F877A carries, complete back-emf zero-crossing examination function.
(8) voltage detecting circuit, its effect is that the sampled voltage of the voltage follower formed by LM324 sends into single-chip microcomputer PIC16F877A, adopts RC filter circuit to connect with amplifier LM324, for completing the measurement to DC-DC change-over circuit output voltage.
(9) current detection circuit comprises D626AN and peripheral circuit, AD626AN is a low cost, the differential amplifier of supporting single power supply with 8 pins, support that the voltage in 30mv to 4.7V scope exports, contain from 10 to 100 adjustable differential gains, because there is linear relationship in this voltage and electric current, so by measuring the voltage signal values on sampling resistor, the value of current signal can be obtained through calculating.
Native system can be applicable to the occasion that all kinds of need carry out drip irrigation and spray irrigation, infiltrating irrigation, compared with prior art have circuit simple and reliable, be swift in motion, degree of intelligence is high, manage simple feature, is a kind of desirable photovoltaic water-raising system.
Claims (8)
1. a photovoltaic water-raising system, comprises photovoltaic water-raising controller, electricly connects respectively with described photovoltaic water-raising controller:
Photovoltaic array, for converting solar energy into electrical energy; Water pump, for pumping up water; Motor, described motor is direct current permanent magnetic brushless motor, for driving described water pump;
It is characterized in that: described photovoltaic water-raising controller comprises:
Control chip; Described control chip is connected with described photovoltaic array, gathers the voltage and current that described photovoltaic array exports;
Power conditioning circuitry; Described power conditioning circuitry electricly connects with described control chip and described photovoltaic array respectively, for making described photovoltaic array Maximum Power Output;
Three-phase inverter bridge circuit, the output of described three-phase inverter bridge circuit and described power conditioning circuitry electricly connects, the output of described three-phase inverter bridge circuit electricly connects with the three-phase of described motor respectively, becomes three-phase alternating current for the DC conversion exported by described photovoltaic array;
Drive circuit, described drive circuit connects described control chip and described three-phase inverter bridge circuit respectively, and described control chip drives the power device of described three-phase inverting circuit by described drive circuit;
Three opposite potential zero cross detection circuits, described three opposite potential zero passage detection electricity are connected with described control chip and described motor respectively, for detecting motor rotor position, obtain commutation information accurately;
Voltage detecting circuit, described voltage detecting circuit and described control chip electricly connect;
Current detection circuit, described current detection circuit and described control chip electricly connect;
Current foldback circuit, described current foldback circuit is connected with described motor with described control chip respectively, for the protection of described motor;
Beat dry protective circuit, describedly beat dry protective circuit and be connected with described motor with described control chip respectively, for sensed water level, control motor start and stop.
2. a kind of photovoltaic water-raising system according to claim 1, is characterized in that: described control chip is PIC16F877A single-chip microcomputer, and on PIC16F877A single-chip microcomputer pin, the pulse-width signal of output pulse width and frequency-adjustable realizes the rotating speed control of motor.
3. a kind of photovoltaic water-raising system according to claim 1, is characterized in that: described power conditioning circuitry is DC/DC booster circuit.
4. a kind of photovoltaic water-raising system according to claim 1, it is characterized in that: described three-phase inverter bridge circuit is the full-controlled bridge circuit of star winding connection, VT1, VT2, VT3, VT4, VT5, VT6 feels ashamed to have MOSET pipe and the fast recovery diode that winding opens turn-off capacity respectively, MOSET pipe is IRF840, VT1, VT3, VT5 is upper brachium pontis, VT4, VT6, VT2 is lower brachium pontis, upper brachium pontis VT1, VT3, the drain electrode of the MOSET switching tube of VT5 is connected to the positive pole of power conditioning circuitry output jointly, lower brachium pontis VT4, VT6, the source class of the MOSET switching tube of VT2 is connected with the negative pole of power conditioning circuitry output, the output of drive circuit is connected on the grid of MOSET switching tube.
5. a kind of photovoltaic water-raising system according to claim 4, it is characterized in that: described drive circuit is IR2130 grid drive chip, the pwm signal that described control chip produces inputs to IR2130 grid drive chip, through power amplification rear drive described in the MOSET pipe of three-phase inverter bridge circuit.
6. a kind of photovoltaic water-raising system according to claim 1, is characterized in that: three opposite potential zero cross detection circuits are by comparator LM339 and peripheral circuit back-emf zero-crossing examination thereof.
7. a kind of photovoltaic water-raising system according to claim 1, is characterized in that: described current foldback circuit comprises: sampling resistor, and sampling resistor converts current signal to voltage signal; Signal amplifier LF353, for amplification voltage signal; Comparator LM339, for by amplify after voltage signal compared with the overcurrent value of setting, NAND gate CD4011, for blocking the input signal of MOSFET.
8. a kind of photovoltaic water-raising system according to claim 1, it is characterized in that: describedly beat dry protective circuit and comprise three wire WH, CM, WL is connected in water, the water level at WH place is the highest, the water level of WL is placed in the middle, CM is that common port is at lowermost end, WH connects+12V voltage, if the water level in well is more than WH, then pass through the direct conducting of water between WH and CM, + 12V voltage makes 7 pin of LM358 export high level through electric resistance partial pressure, l pin exports high level, make optocoupler OPTOISO1 conducting, control chip detects high level, when water level decreasing is to below WH, because now optocoupler conducting, so CM and WL is still by water conducting, the dividing potential drop result of+12V still makes 7 pin of LM324 export high, 1 pin still exports high level, the level signal of giving control chip is constant, when water level continues to drop to below WL, CM and WL disconnects, the voltage step-down of CM end, 7 pin of LM324 are made to export as low level, 1 pin exports step-down, light lotus root OPTOISO1 closes, control chip detect low level represent at this moment water economy-combat do, need to shut down retaining, after shutting down a period of time, water level can rise gradually, when water level rises to WL, optocoupler still not conducting, control chip still can detect low level, until when water level rises to WH, optocoupler is conducting again, single-chip microcomputer just can detect that high level WL is the water level that water pump is shut down, and WH is the water level of water pump start, a water-head is there is between WH and WL, form the stagnant ring of water level detecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420750991.0U CN204258690U (en) | 2014-12-04 | 2014-12-04 | A kind of photovoltaic water-raising system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420750991.0U CN204258690U (en) | 2014-12-04 | 2014-12-04 | A kind of photovoltaic water-raising system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204258690U true CN204258690U (en) | 2015-04-08 |
Family
ID=52962953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420750991.0U Expired - Fee Related CN204258690U (en) | 2014-12-04 | 2014-12-04 | A kind of photovoltaic water-raising system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204258690U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898520A (en) * | 2015-05-22 | 2015-09-09 | 上海晟矽微电子股份有限公司 | Micro-controller used for motor control |
| CN105089965A (en) * | 2015-08-31 | 2015-11-25 | 上海俊玥能源科技有限公司 | Alternating-current photovoltaic water pump system and control method thereof |
| CN106130434A (en) * | 2016-08-04 | 2016-11-16 | 国网江西省电力公司电力科学研究院 | A kind of utilize solar powered pump motor control system |
| CN106301104A (en) * | 2015-05-15 | 2017-01-04 | 苏州莫康控制技术有限公司 | The brush DC of a kind of cold-storage door controls device |
| CN107804921A (en) * | 2017-11-24 | 2018-03-16 | 安徽黄河水处理科技股份有限公司 | A kind of solar energy directly drives aerating system |
| CN107834913A (en) * | 2017-11-24 | 2018-03-23 | 安徽黄河水处理科技股份有限公司 | A kind of solar energy brushless controller |
| CN108343578A (en) * | 2017-01-21 | 2018-07-31 | 深圳市拓日新能源科技股份有限公司 | Solar energy water pumping system |
| CN109441790A (en) * | 2018-11-12 | 2019-03-08 | 无锡双能达科技有限公司 | A kind of brine crystallization apparatus for controlling pump and its control method |
| CN112202384A (en) * | 2020-08-25 | 2021-01-08 | 海南广源隆节能环保股份有限公司 | Automatic control safety protection method and device for photoelectric water control system |
| CN112448653A (en) * | 2020-11-16 | 2021-03-05 | 杭州微秦科技有限公司 | Frequency conversion control method for solar power supply |
| CN113992072A (en) * | 2021-11-02 | 2022-01-28 | 丽水学院 | Internal circuit control and regulation process of permanent magnet synchronous motor and protection system thereof |
-
2014
- 2014-12-04 CN CN201420750991.0U patent/CN204258690U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301104A (en) * | 2015-05-15 | 2017-01-04 | 苏州莫康控制技术有限公司 | The brush DC of a kind of cold-storage door controls device |
| CN104898520A (en) * | 2015-05-22 | 2015-09-09 | 上海晟矽微电子股份有限公司 | Micro-controller used for motor control |
| CN104898520B (en) * | 2015-05-22 | 2018-09-11 | 上海晟矽微电子股份有限公司 | A kind of microcontroller for motor control |
| CN105089965A (en) * | 2015-08-31 | 2015-11-25 | 上海俊玥能源科技有限公司 | Alternating-current photovoltaic water pump system and control method thereof |
| CN106130434B (en) * | 2016-08-04 | 2018-11-27 | 国网江西省电力公司电力科学研究院 | It is a kind of to utilize solar powered pump motor control system |
| CN106130434A (en) * | 2016-08-04 | 2016-11-16 | 国网江西省电力公司电力科学研究院 | A kind of utilize solar powered pump motor control system |
| CN108343578B (en) * | 2017-01-21 | 2020-07-31 | 深圳市拓日新能源科技股份有限公司 | Solar water pump system |
| CN108343578A (en) * | 2017-01-21 | 2018-07-31 | 深圳市拓日新能源科技股份有限公司 | Solar energy water pumping system |
| CN107804921A (en) * | 2017-11-24 | 2018-03-16 | 安徽黄河水处理科技股份有限公司 | A kind of solar energy directly drives aerating system |
| CN107834913A (en) * | 2017-11-24 | 2018-03-23 | 安徽黄河水处理科技股份有限公司 | A kind of solar energy brushless controller |
| CN107834913B (en) * | 2017-11-24 | 2024-01-12 | 安徽黄河水处理科技股份有限公司 | Solar brushless controller |
| CN107804921B (en) * | 2017-11-24 | 2024-01-26 | 安徽黄河水处理科技股份有限公司 | Solar direct-drive aeration system |
| CN109441790A (en) * | 2018-11-12 | 2019-03-08 | 无锡双能达科技有限公司 | A kind of brine crystallization apparatus for controlling pump and its control method |
| CN112202384A (en) * | 2020-08-25 | 2021-01-08 | 海南广源隆节能环保股份有限公司 | Automatic control safety protection method and device for photoelectric water control system |
| CN112448653A (en) * | 2020-11-16 | 2021-03-05 | 杭州微秦科技有限公司 | Frequency conversion control method for solar power supply |
| CN112448653B (en) * | 2020-11-16 | 2022-09-06 | 杭州微秦科技有限公司 | Frequency conversion control method for solar power supply |
| CN113992072A (en) * | 2021-11-02 | 2022-01-28 | 丽水学院 | Internal circuit control and regulation process of permanent magnet synchronous motor and protection system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204258690U (en) | A kind of photovoltaic water-raising system | |
| CN202188633U (en) | Air source heat pump water heater | |
| CN203633271U (en) | Solar energy water lifting drip irrigation system | |
| CN103312140B (en) | Starting method of multi-branch two-stage three-phase photovoltaic grid-connected inverter | |
| CN201730811U (en) | Photovoltaic water pump controller | |
| CN201499003U (en) | Z source based wind and solar energy complementary generating set | |
| CN102913426A (en) | Full-automatic efficient photovoltaic water pump system and control method thereof | |
| CN106130434A (en) | A kind of utilize solar powered pump motor control system | |
| CN202867123U (en) | Solar energy water pump | |
| CN201103546Y (en) | High-efficiency photovoltaic water pump system | |
| CN206211646U (en) | One kind is super to hold controller for solar | |
| CN203608087U (en) | MPPT controller of double-Boost circuit | |
| CN106451733A (en) | Super-capacity solar controller | |
| CN104796065A (en) | Control circuit of wind-solar grid-connected power generation system on expressway | |
| CN207691753U (en) | A kind of photovoltaic water pump system based on maximum current detection | |
| CN205406426U (en) | Miniature circuit breaker electric operating mechanism's standby power consumption control circuit | |
| CN205064205U (en) | Exchange photovoltaic water pump system | |
| CN203223359U (en) | Photovoltaic water pump system with sensor-free brushless DC motor | |
| CN203548244U (en) | Highly-efficient fully-automatic photovoltaic water pump system | |
| CN104805888A (en) | Photovoltaic water pumping system | |
| CN205047381U (en) | High -lift solar photovoltaic irrigates by lifting water to a higher level with a water pump, etc. station | |
| CN207229319U (en) | A kind of deep well pump frequency converter that can follow the trail of solar panels maximum power | |
| CN204089217U (en) | A kind of photovoltaic power generation grid-connecting apparatus | |
| CN105089965B (en) | A kind of AC photovoltaic water pump system and its control method | |
| CN201440008U (en) | Split-type solar water heater system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20171204 |