CN209151079U - A kind of energy-storage type driving device of single shaft photovoltaic tracking bracket - Google Patents
A kind of energy-storage type driving device of single shaft photovoltaic tracking bracket Download PDFInfo
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- CN209151079U CN209151079U CN201821719267.6U CN201821719267U CN209151079U CN 209151079 U CN209151079 U CN 209151079U CN 201821719267 U CN201821719267 U CN 201821719267U CN 209151079 U CN209151079 U CN 209151079U
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- 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
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Abstract
The utility model discloses a kind of energy-storage type driving devices of uniaxial photovoltaic tracking bracket, energy input is obtained from photovoltaic battery panel, the storage subsystem of electric energy in short-term and a mechanical energy storage subsystem based on clump weight potential energy including one based on capacitor, stored energy are used to drive the annual variation law movement of season adjustable uniaxial photovoltaic tracking bracket according to sun elevation angle.For 1 year round-trip super slow motion feature of season adjustable photovoltaic tracking bracket, capacitor low current is devised to charge at a slow speed, high current is discharged the service intermittent mode of driving motor in short-term, is effectively reduced the power demand of solar panel and supply convertor, is thereby reduced equipment overall cost.
Description
Technical field
The utility model belongs to sun tracker technical field, and the energy-storage type for being related to a kind of uniaxial photovoltaic tracking bracket drives
Dynamic device.
Background technique
Photovoltaic tracking bracket is widely used in solar energy power generating field, and function is by adjusting the work of tracking bracket
Make angle, make the spatial position of the photovoltaic battery panel installed on the bracket tracking sun, reaches maximization and receive solar radiation energy
Purpose.
The spatial movement of the perfect tracking sun needs the tracking of two angles in azimuth and pitch angle, and this bracket is known as double
Axis tracks bracket.It, can by a fixation in azimuth and pitch angle and only in order to improve the cost effectiveness of photovoltaic tracking bracket
Another is tracked, this tracking bracket is known as uniaxial tracking bracket.The uniaxial photovoltaic tracking branch of rotary shaft less parallel ground level
Frame is known as flat single shaft.Flat single shaft photovoltaic tracking bracket can be divided into two kinds of " the flat single shaft in north and south " and " thing is put down uniaxial " again.
The so-called flat single shaft in north and south refers to that main rotating shaft north-south is arranged, the normal of solar panel plane tracks the sun from east orientation west
Azimuthal variation；The so-called flat single shaft of thing refers to that main rotating shaft East and West direction is arranged, solar panel normal direction tracks altitude of the sun
The variation at angle.The tracking solar azimuth variation from West to East daily of the flat uniaxial needs in north and south, and returned after the sun is fallen.
Since the variation range of solar elevation among one day is smaller, cosine effect between solar panel and sunlight compared with
It is weak, therefore the flat uniaxial tracking bracket of thing does not consider usually to track the variation of daily solar elevation, it is only necessary to a Nian Zhongji
The average pitch angle of section variation adjustment photovoltaic tracking bracket.This thing for pressing seasonal variations adjustment pitch angle in 1 year
Flat single shaft photovoltaic tracking bracket is also referred to as " season is adjustable uniaxial photovoltaic tracking bracket ".
Since the rule of tracking movement is different, the north and south of daily real-time tracking solar azimuth puts down single shaft and presses seasonal adjustment
The flat uniaxial tracking bracket of the thing of pitch angle has following important difference in structure:
In terms of drive system mechanical structure, due to acting frequently, daily one is adjusted back and forth the flat single shaft in north and south, therefore its
Final stage driving mechanism mostly uses disc type speed reducer and electric pushrod etc. to have the structure of bearing and lubrication.Season is adjustable, and thing is flat uniaxial
Annual one is adjusted back and forth, and the movement frequency is substantially less than north and south and puts down single shaft, entirely uses in life cycle and there was only tens of adjustings
Back and forth, therefore its final stage driving mechanism mostly uses the simple driving structure such as scissor-like jack and rack-and-pinion.
In terms of drive system tracks operating principle, it is usually necessary to use motor drives for the flat single shaft in the north and south of real-time action
It is dynamic, it is therefore desirable to the equipment such as stand-by power source and service cable to support electric drive system to work.Put down uniaxial driving electricity in north and south
Usually there are " station service centrally managed distribution " and " live photovoltaic battery panel takes electricity " two kinds of operating modes in source.Using station service centrally managed distribution
Need to lay a large amount of power supply private cable when mode in photovoltaic power generation factory, complicated higher cost of constructing.Using live photovoltaic
Solar panel usually requires that solar panel power is suitable with driving motor power when directly taking the power supply mode of electricity.And it needs for power supply system
Standby large-capacity battery under unified central planning, for ensuring when solar irradiance declines photovoltaic battery panel generated energy deficiency, tracking system tool
By battery when having enough electric energy that solar panel revolution is reset to second day power generation position, or can not generate electricity under extreme weather
Plate is rotated to wind resistance reset position.Due to needing the photovoltaic power generation apparatus and energy storage battery of larger capacity, traditional photovoltaic electric
The automatic electricity getting working method equipment investment of pond plate scene is larger.
And thing is flat uniaxial since angle change speed is extremely slow, generallys use and is manually manually adjusted by season or month
Working principle, eliminate expensive electrical system, effectively reduce the cost of tracking support system.Due to season adjustable thing
Flat single shaft photovoltaic tracking bracket mostly uses the working method manually manually adjusted by season, thus this photovoltaic tracking bracket also by
Referred to as " manual adjustable support ".
Season adjustable photovoltaic tracking bracket uses the working method manually adjusted by season, the time interval of adjustment
Greatly, cause to track bracket movement not in time, the mean cosine effect between solar panel and sunray increases, and has lost certain ratio
The photovoltaic power generation quantity of example.
The initial construction cost that season adjustable photovoltaic tracks bracket is lower, but manually adjusts in the operational process of power station
Larger workload, cause the maintenance cost in later period higher.
Utility model content
The purpose of the utility model is to provide a kind of energy-storage type driving devices of uniaxial photovoltaic tracking bracket, solve existing
Season adjustable photovoltaic tracking bracket manually adjusts the high problem of great work intensity, later maintenance cost existing for mode.
The utility model is the technical scheme adopted is that a kind of energy-storage type driving device of single shaft photovoltaic tracking bracket, packet
Photovoltaic battery panel is included, the electric energy of photovoltaic battery panel output is successively delivered to DC/DC converter, energy storage capacitor, motor driver
And motor, motor are connected with mechanical accumulated energy mechanism；
Further include tracking bracket controller, tracking bracket controller respectively with DC/DC converter, energy storage capacitor and motor
Driver connection.
The utility model is also characterized by
Mechanical accumulated energy mechanism includes reduction gear box, and the input terminal of reduction gear box and the main shaft of motor connect, slow down
The gearbox output shaft of gear-box is connected to one end of attitude regulation mechanism input shaft, and attitude regulation mechanism input shaft is connected to appearance
On state regulating mechanism, the shell of reduction gear box is connected to the driving swing arm upper end of sagging setting.
Obliquity sensor is additionally provided in driving swing arm, obliquity sensor is used to measure the inclination angle alpha of driving swing arm 13,
Track bracket controller reading inclination α.
When the length and focusing in deflection process certainly of driving swing arm itself cannot be provided more than or equal to attitude regulation mechanism
It when torque needed for input shaft rotation, drives the lower end of swing arm to be connected with clump weight, clump weight is used for: being rotated through in driving swing arm
Cheng Zhong, the swing height H with driving swing arm increase, and realize the storage to driving swing arm driving energy.
The driving method of attitude regulation mechanism is input shaft rotation driving.
The utility model has the beneficial effects that a kind of energy-storage type of uniaxial photovoltaic tracking bracket of the utility model drives dress
It sets, photovoltaic tracking bracket is driven by accumulation of energy using the small-power energy of photovoltaic battery panel output, simplifies power supply unit structure
It reduces costs；The characteristics of acting at a slow speed for season adjustable support and being required without accumulation of energy return, using capacitor instead of light
Common large capacity energy storage battery in tracking system is lied prostrate, service life and the maintenance issues of battery are avoided；Using swing arm structure pair
Motor output carries out mechanical potential accumulation of energy, improves transmission efficiency while simplifying Vidacare corp support construction.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model；
Fig. 2 is a kind of installation of the energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model on photovoltaic bracket
Schematic diagram；
Fig. 3 is mechanical accumulated energy mechanism and appearance in a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model
The attachment structure schematic diagram of state regulating mechanism input shaft；
Fig. 4 is attitude regulation mechanism and appearance in a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model
The attachment structure schematic diagram of state regulating mechanism input shaft；
Fig. 5 is DC/DC converter, accumulation of energy in a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model
The circuit connection diagram of capacitor and motor driver bracket；
Fig. 6 (a), (b) be in a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model season it is adjustable
Uniaxial photovoltaic tracking holder pivots drive the status diagram of swing arm rotation.
In figure, 1. photovoltaic battery panels, 2. tracking bracket controllers, 3.DC/DC converter, 4. energy storage capacitors, 5. motors
Driver, 6. motor, 7. reduction gear boxes, 8. gearbox output shafts, 9. attitude regulation mechanisms, 10. seasons are adjustable uniaxial light
Volt tracking bracket, 11. attitude regulation mechanism input shafts, 12. high power battery board groups, 13. driving swing arms, 14. clump weights, 15.
16. luffing mechanism crossbeam of obliquity sensor, 17. pitching shafts, 18. tracking bracket upright posts, 19 attitude regulation mechanism upper extreme points, 20
Attitude regulation mechanism lower extreme point, 21. scissor-like jack support arms, the horizontal endpoint of 22. scissor-like jacks, 23.DC/DC controller.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model, as shown in Figures 1 to 3, including photovoltaic
Solar panel 1, photovoltaic battery panel 1 export electric energy be successively delivered to DC/DC converter 3, energy storage capacitor 4, motor driver 5 and
Motor 6, motor 6 are connected with mechanical accumulated energy mechanism；
Further include tracking bracket controller 2, tracking bracket controller 2 respectively with DC/DC converter 3, energy storage capacitor 4 and
Motor driver 5 connects.
Mechanical accumulated energy mechanism includes reduction gear box 7, and the input terminal of reduction gear box 7 connect with the main shaft of motor 6, subtracts
The gearbox output shaft 8 of fast gear-box 7 is connected to one end of attitude regulation mechanism input shaft 11, attitude regulation mechanism input shaft 11
It is connected in attitude regulation mechanism 9.The shell of reduction gear box 7 is connected to 13 upper end of driving swing arm of sagging setting.Reducing gear
Roller box 7 has self-locking structure.
Obliquity sensor 15 is additionally provided in driving swing arm 13, obliquity sensor 15 is connect with tracking bracket controller 2.
The lower end of driving swing arm 13 is connected with clump weight 14.
Season is adjustable, and uniaxial photovoltaic tracking bracket 10 includes high power battery board group 12, and high power battery board group 12 is mounted on
On luffing mechanism crossbeam 16, luffing mechanism crossbeam 16 is connected to the top of tracking bracket upright post 18, posture by pitching shaft 17
The common driving forms such as scissor-like jack, lead screw screw rod or rack-and-pinion, posture tune in the present embodiment may be selected in regulating mechanism 9
It saves mechanism 9 and uses existing scissor-like jack；It is illustrated by taking the photovoltaic tracking bracket of scissor-like jack driving as an example.
Scissor-like jack is a kind of common hoisting apparatus, as shown in figure 4, it is very heavy by four hinged scissors that assume diamond in shape
Topmast arm 21 is constituted, and rotatably adjustable lead screw is provided in the by-level of four scissor-like jack support arms 21.This reality
It applies in example, the lower part node i.e. attitude regulation mechanism lower extreme point 20 of scissor-like jack are connected by rotatable hinge
In tracking bracket upright post 18.The upper node i.e. attitude regulation mechanism upper extreme point 19 of scissor-like jack, by rotatable
Be hingedly connected on luffing mechanism crossbeam 16.When the horizontal adjustment lead screw of scissor-like jack, that is, attitude regulation mechanism are defeated
Enter axis 11, when rotating, the distance between attitude regulation mechanism upper extreme point 19 and attitude regulation mechanism lower extreme point 20 can be changed.
When the distance between attitude regulation mechanism upper extreme point 19 and attitude regulation mechanism lower extreme point 20 change, pitching machine can be driven
Structure crossbeam 16 is rotated around pitching shaft 17, achievees the purpose that adjust 12 pitch angle of high power battery board group.
For reducing pitch angle, attitude regulation mechanism input shaft 11 rotates, under the action of screw and nut,
The distance between two horizontal endpoints of scissor-like jack reduce, attitude regulation structure upper extreme point 19 and attitude regulation structure lower extreme point
Height between 20 increases, and realizes the pushing tow function to luffing mechanism crossbeam 16.Under the thrusting action of scissor-like jack, pitching
Mechanism crossbeam 16 is rotated around pitching shaft 17 to horizontal direction, to realize subtracting for 12 pitch angle of high power battery board group
Small adjustment.The adjustment process for increasing by 12 pitch angle of high power battery board group is similar only contrary.
Scissor-like jack separately installed multiple can also be installed in series on season adjustable uniaxial photovoltaic tracking bracket, go here and there
It needs to be connected in series synchronous rotary for the shaft of different jack when connection installation.The driving machines such as screw rod lead screw and rack-and-pinion
It is similar that structure is applied to situation when season adjustable uniaxial photovoltaic tracking bracket, it is unified be characterized in having one it is horizontally disposed defeated
Entering axis, input shaft can be with horizontal series, and the distance between two endpoints change driving mechanism up and down when trunnion axis rotates, from
And realize the adjustment of 16 angle of luffing mechanism crossbeam.
The pitch angle for adjusting high power battery board group 12 in season adjustable photovoltaic support, needs rotation attitude regulating mechanism
9 attitude regulation mechanism input shaft 11.When the end of attitude regulation mechanism input shaft 11 is subjected to displacement, in the utility model by
The energy-storage type driving system structure that DC/DC converter 3, energy storage capacitor 4, motor driver 5 and motor 6 form can be therewith
It is mobile.
Tracking bracket controller 2 is a kind of prerequisite control device of all adjust automatically tracing type photovoltaic brackets,
Core is the microprocessor with calculation processing power, which can be according to current photovoltaic tracking bracket target angle
Deviation between actual angle automatically issues instruction control motor, and reaches target angle by motor band motion tracking bracket
Spend range.It can also realize that equivalent current supply management, working condition are supervised by the calculation processing power of tracking bracket controller 2 simultaneously
It surveys and the functions such as safeguard protection.The utility model increases accumulation electrical source on the basis of existing photovoltaic tracking bracket controller 2
Management function.
The core of the utility model is the energy-storage type dynamical system of season adjustable uniaxial photovoltaic tracking bracket, tracks bracket
Controller 2, which detects and controls the specific method of high power battery board group pitch angle, does not influence the reality of technical solutions of the utility model
Existing, the specific installation site of tracking bracket controller 2 nor affects on the realization of technical solutions of the utility model.
The parameter of power pack is as follows in a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model:
Photovoltaic battery panel 1: voltage rating DC6V, rated current 200mA, power 1.2W；
Motor 6: voltage rating 12V, rated current 2.2A, power > 25W, starting current 4.5A.
DC/DC converter 3: input voltage 2-7V, maximum input service electric current 250mA.
As shown in figure 5, the electric energy that photovoltaic battery panel 1 exports is sent into DC/DC converter 3, DC/DC converter 3 is controlled by DC/DC
Device 23 and peripheral electrical element processed are constituted, and core function is to realize the charging accumulation of energy of energy storage capacitor 4.Energy storage capacitor 4 is adopted
It is in series to amount to 4 supercapacitors with C1, C2, C3, C4 of pressure-resistant 5.5V capacity 4F.The internal resistance 200m of single capacitor
Ω, rated current 2.5A, maximum operating currenbt 10.0A, the capacity of energy storage capacitor group is 1.0F after series connection, and pressure resistance is 22V, interior
Hinder 0.8 Ω.
Series capacitor is distinguished parallel connection and is matched because of individual capacitors over-voltage caused by internal resistance difference, each capacitor in order to prevent
Zener diode D11, D12, D13 and the D14 for being equipped with 5.6V carry out pressure and handle.When single capacitor over-voltage, two pole of pressure stabilizing
Pipe will provide current bypass circuit.
DC/DC converter 3 in the present embodiment uses the controllable step-up DC/DC converter with MPPT following function,
Entire circuit is Boost structure.DC/DC controller 23 makes itself and inductance L1 and two poles by DRV port controlling MOSFET pipe Q1
Pipe D0 constitutes Boost circuit.DC/DC controller 23 is detected on sample resistance R8 by port CSP and CSN in charging process
Charging current, realize to the constant-current charge of energy storage capacitor 4.Circuit is electric by the end of capacitor group by divider resistance R7 and R6
Pressure is input to the FB feedback measurement end of DC/DC controller 23, when voltage rises to preset 20V when capacitor group end, DC/DC control
Device 23 processed stops working, and charging process terminates.
In order to realize the capacitor charging circuit be made of DC/DC converter 3 and energy storage capacitor 4 and tracking bracket controller
Signal between 2 connects, and the DC/DC controller 23 in DC/DC converter 3 can be received by the port SHDN come autotracking bracket
Controller 2 starts and stops order.It when the port SHDN is low level, charges to energy storage capacitor 4, when the port SHDN is height
When level, energy storage capacitor 4 stops charging.In 4 charging process of energy storage capacitor, the end CHRG of DC/DC controller 23 is low
Level, when charging to preset 20V voltage, the end CHRG exports high level, informs tracking bracket controller 2, energy storage capacitor 4
Charging finishes, and has operating condition.
During charging work, DC/DC controller 23 detects the inductive current flowed through on Q1 by sample resistance R5, and leads to
DC/DC controller 23 is inputted after crossing the filter circuit that R4 and C02 is constituted, realizes detection and protection to inductance operating current.
When intensity of illumination deficiency, the output energy of photovoltaic battery panel 1 is insufficient, can not be electric to accumulation of energy by default rated current
Container 4 charges.The voltage status of photovoltaic battery panel 1 is passed through MPPT by sample resistance network R1 and R2 by DC/DC controller 23
Port input, when 1 voltage of photovoltaic battery panel is lower than rated value 6V, 23 adjust automatically setting charging current value of DC/DC controller,
Actual charge current numerical value is reduced, realizes the maximal power tracing of 1 power of photovoltaic battery panel, abbreviation MPPT control.
In Fig. 5, photovoltaic battery panel 1 export electric energy 3 inner branch of DC/DC converter all the way power supply to tracking bracket
Controller 2 provides working power.3 circuit of DC/DC converter can according to circumstances before voltage transformation and voltage transformation after to
Track bracket controller 2 provides power supply.This embodiment is in voltage transformation premise power supply source.
In the state of charging complete, if tracking support angle deviation transfinites, tracking bracket controller 2 be can star
Motor driver 5 drives motor 6.In this embodiment motor driver 5 be one by four transistor Q1, Q2,
The H bridge type direct current motor drive circuit that Q3, Q4 are constituted includes PWM type decompression driving function, can be by the capacitor of 20.0-14.0V
Group end voltage step-down is exported to 12V, maximum starting operating current > 5A, 2.2A when nominal operation.
Under this running parameter, the energy storage capacitor 4 that 1.0 farads of equivalent capacity once discharges the electricity of release from 20V to 14V
It can are as follows:
W=0.5CU2=0.5 × 1 × 20 × 20=200J.
W=0.5CU2=0.5 × 1 × 14 × 14=98J.
A maximum discharge capacity is 102J=200J-98J
It is assumed that the efficiency of H bridge type PWM drive circuit is about 85%, effective output of 102 joules of energy storage is about 86.7 burnt
Ear can drive 25W motor 6 to work more than 3.47s.It is defeated to set its gear-box after the deceleration of reduction gear box 7 of motor 6
The revolving speed of shaft 8 is 0.5RPM, and the 3.47s time is rotatable more than 10.4 degree.
When irradiation level reaches solar panel rated value, the power of photovoltaic battery panel 1 is 1.2W, and setting Boost circuit turns
Changing efficiency is 82%, then charge power is 0.98W.Being filled with 98J electric energy needs 100s can be completed.
Due to using capacitor accumulation of energy structure, the power of photovoltaic battery panel 1 is significantly less than the power of motor 6, can be with
It is even more small to reach 10%.Volume is also reduced while reducing the cost of photovoltaic battery panel 1, facilitates in-site installation.Accumulation of energy
Although capacitor 4 is small compared to battery storage capacity and the electric energy holding time is short, meet season levelling single shaft branch just
The requirement of intermittent drive at a slow speed of frame.
The parameter set in the present embodiment is driving swing arm 13 is L=0.5m long, 14 mass m=4Kg of clump weight.
Without loss of generality, as shown in Fig. 6 (a), Fig. 6 (a) is the initial mounting state figure for driving swing arm；
Vertically downward, gearbox output shaft 8 does not have attitude regulation mechanism input shaft 11 to initial installation rear-guard movable pendulum arm 13
Torque output.As shown in Fig. 6 (b), 6 (b) be that swing arm 13 is driven to show with the state that attitude regulation mechanism input shaft 11 rotates angle [alpha]
It is intended to；After gearbox output shaft 8 rotates counterclockwise, driving swing arm 13 side oscillation to the left under counter-force effect, as driving is
System constantly obtains Driven by Solar Energy motor 6 and rotates, and the drift angle α of driving swing arm 13 is continuously increased, the height gain H of clump weight 14
It constantly increases, realizes the purpose of mechanical accumulated energy driving.
Storing ENERGY E can be calculated using following formula
E=mg H=mg (L-L × cos α) (1)；
The torque for driving swing arm 13 and clump weight 14 to form attitude regulation mechanism input shaft 11 simultaneously can be calculated with following formula:
T=mg L sin α (2)；
When driving swing arm drift angle α=90 degree, driving swing arm 13 and clump weight 14 are to 11 shape of attitude regulation mechanism input shaft
At torque it is maximum, under conditions of L=0.5m in this example, 14 mass 4Kg of clump weight, maximum input torque are as follows: T=4 ×
9.8 × 0.5 × 1=19.6N.m.
It sets 100 circle tracking bracket pitch angle of the rotation of attitude regulation mechanism input shaft 11 and adjusts 45 degree, then average rotation
Turning reduction ratio is 800, it is assumed that the transmission efficiency of this scissor-like jack (attitude regulation mechanism 9) is 30% in this example.Simultaneously
It is assumed that the torque demand of the final stage solar panel adjustment of tracking bracket is 1920N.m.
Then input torque demand is 8N.m (1920=800 × 30% × 8)
It is assumed that the torque demand that attitude regulation mechanism 9 overcomes static friction to rotate is 8N.m, then start-up trace bracket acts
Input torque demand are as follows:
T=8+8=16N.m
When angle increases to α=54.8 degree, input torque T=4 × 9.8 × 0.5 × sin54.8=16N.m, at this time
After the input torque of 16N.m overcomes the static friction torque of 8N.m, the attitude regulation machine of season is adjustable uniaxial photovoltaic tracking bracket 10
The net moment of torsion of the input of structure input shaft 11 8N.m.It, can be to final stage solar panel under conditions of 800 times of reduction ratio, transmission efficiency 30%
Bracket inputs the torque of 1920N.m, so that season adjustable uniaxial photovoltaic tracking bracket 10 be driven to start to rotate, clump weight 14 starts
It falls, while drift angle α reduces.
It is assumed that it is 2N.m that the driving mechanism of season adjustable uniaxial photovoltaic tracking bracket 10, which overcomes the torque demand of dynamic friction, when
When drift angle is continued to decline to α=30.7 degree or less, input torque is less than T=4 × 9.8 × 0.5 × sin30.7=10.0N.m, drives
The torque that movable pendulum arm 13 inputs is less than the 2N.m for overcoming season adjustable uniaxial 10 resistance 8N.m of photovoltaic tracking bracket and dynamic friction
The sum of torque, 11 stopping of attitude regulation mechanism input shaft movement.
Season, adjustable uniaxial 10 drift angle α of photovoltaic tracking bracket increased to 54.7 degree from 0 ° in this example, and driving season is adjustable
It is that primary driving is adjusted that uniaxial photovoltaic tracking bracket 10, which is fallen after rise after acting to 30.7 degree of process,.Actuating range is 24 degree, is needed
Electrical system carries out 2-3 accumulation of energy.After the completion of primary driving is adjusted system under the action of motor 6 and reduction gear box 7 after
It is continuous to increase drift angle α, start next adjustment process.
The potential energy of swing arm 13 and clump weight 14 is driven when α=54.7 degree are as follows:
E=4 × 9.8 × (0.5 (1-cos54.7 °))=4 × 9.8 × 0.422=16.5J
The potential energy of swing arm 13 and clump weight 14 is driven when α=30.7 degree are as follows:
E=4 × 9.8 × (0.5 (1-cos30.7 °))=4 × 9.8 × 0.14=5.5J
The energy of release is 16.5-5.5=11 joules.
In driving 13 course of work of swing arm, obliquity sensor 15 can drive the tilt angle [alpha] of swing arm with actual measurement, and
It can be calculated by above-mentioned formula (2) and obtain driving torque T, driving torque T can reach after driving swing arm 13 to reach horizontal position
Maximum value.It can control the maximum drive torque T of system by adjusting driving 13 length L of swing arm and 14 weight G of clump weight.
When mechanical breakdown, which occurs, causes bracket that can not rotate, drift angle α persistently increases, and control system passes through obliquity sensor
Simultaneously peak torque protection can be achieved after calculating the driving torque T of attitude regulation mechanism input shaft 11 in 15 measurement drift angle α.This implementation
Set in example α >=75 degree when torque overload alarm, corresponding protection torque at this time are as follows:
T=4 × 9.8 × 0.5 × sin75=19.0N.m
75 degree after α is more than maximum set value, torque is more than 19.0N.m, and system will stop motor 6 and drive and alarm,
It realizes and stops protection.
In a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model, the specified function of photovoltaic battery panel 1
The rated power of rate and DC/DC converter 3, respectively less than the 20% of 6 rated power of motor, need through energy storage capacitor 4
Accumulation of energy just can produce the electrical power of the work of drive motor 6, and after the completion of accumulation of energy, motor 6 consumes storage in energy storage capacitor 4
Electric energy complete the maximum duration that primary motor 6 in short-term drives and be no more than 30s；
Photovoltaic battery panel 1 can be separately provided, and also may be derived from high power battery board group 12.
Structurally and mechanically one entirety of composition can be used in combination in accumulating mechanism for capacitor accumulation of energy in the utility model, can also be single
Solely separate independent use.
When driving swing arm 13 itself length and certainly focus on deflection after can provide greater than attitude regulation mechanism input shaft 11
When torque required for rotating, clump weight 14 can be cancelled.
A kind of the characteristics of energy-storage type driving device of uniaxial photovoltaic tracking bracket of the utility model is, for it is intermittent in short-term
Movement is mechanical to be needed often to overcome the problems, such as that drive efficiency caused by stiction is low and drive shaft tip position is with bracket
The problem of attitudes vibration, devises the mechanical energy storage subsystem based on pendency swing arm and clump weight, passes through pendency swing arm and counterweight
The cooperating of block inputs driving torque to tracking carriage drive axis, while rotating raised potential energy by clump weight and realizing machinery
It can store, achieve the purpose that simplified driving mechanism mounting means and improve energy utilization efficiency.
Claims (5)
1. a kind of energy-storage type driving device of single shaft photovoltaic tracking bracket, it is characterised in that: including photovoltaic battery panel (1), photovoltaic
The electric energy of solar panel (1) output is successively delivered to DC/DC converter (3), energy storage capacitor (4), motor driver (5) and electronic
Machine (6), motor (6) are connected with mechanical accumulated energy mechanism；
Further include tracking bracket controller (2), tracking bracket controller (2) respectively with DC/DC converter (3), energy storage capacitor
(4) and motor driver (5) connects.
2. a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket according to claim 1, it is characterised in that: described
Mechanical accumulated energy mechanism includes reduction gear box (7), and the input terminal of reduction gear box (7) is connect with the main shaft of motor (6), is slowed down
The gearbox output shaft (8) of gear-box (7) is connected to one end of attitude regulation mechanism input shaft (11), the input of attitude regulation mechanism
Axis (11) is connected on attitude regulation mechanism (9), and the shell of reduction gear box (7) is connected to the driving swing arm (13) of sagging setting
Upper end.
3. a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket according to claim 2, it is characterised in that: described
It is additionally provided with obliquity sensor (15) in driving swing arm (13), obliquity sensor (15) is used to measure the inclination of driving swing arm (13)
The inclination angle alpha can be read in angle [alpha], the tracking bracket controller (2).
4. a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket according to claim 3, it is characterised in that: work as institute
It states the length of driving swing arm (13) itself and focuses in deflection process to provide certainly and inputted more than or equal to attitude regulation mechanism
When torque needed for axis (11) rotation, the lower end of driving swing arm (13) is connected with clump weight (14), the clump weight (14)
For: in driving swing arm (13) rotary course, as the swing height H of driving swing arm (13) increases, realize to driving swing arm
(13) storage of driving energy.
5. a kind of energy-storage type driving device of uniaxial photovoltaic tracking bracket according to claim 2, it is characterised in that: described
The driving method of attitude regulation mechanism (9) is input shaft rotation driving.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336529A (en) * | 2019-08-05 | 2019-10-15 | 无锡昊阳智慧能源有限公司 | A kind of photovoltaic bracket angle adjusting tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336529A (en) * | 2019-08-05 | 2019-10-15 | 无锡昊阳智慧能源有限公司 | A kind of photovoltaic bracket angle adjusting tool |
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