CN110071563A - A kind of energy management circuit collected for piezoelectric energy - Google Patents
A kind of energy management circuit collected for piezoelectric energy Download PDFInfo
- Publication number
- CN110071563A CN110071563A CN201910263626.4A CN201910263626A CN110071563A CN 110071563 A CN110071563 A CN 110071563A CN 201910263626 A CN201910263626 A CN 201910263626A CN 110071563 A CN110071563 A CN 110071563A
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- voltage
- energy
- rectifier
- converter
- circuit
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- 230000005611 electricity Effects 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of energy management circuits collected for piezoelectric energy, the energy management circuit collected for piezoelectric energy is integrated with the overturning of synchronization bias voltage and maximum power point tracking technology, it can be run on according to the energy grade being collected under three kinds of different operating modes, to realize the energy management that piezoelectric energy is collected.A kind of energy management circuit collected for piezoelectric energy is made of synchronization bias voltage overturning rectifier, DC-DC converter, mode selector, clock generator, MPPT maximum power point tracking circuit and open switch.
Description
Technical field
The invention mainly relates to a kind of energy management circuits collected for piezoelectric energy.
Background technique
Wireless sensor generally uses conventional batteries to power, since micro wireless sensor has a very wide distribution, distribution site
Remote, so that replacement battery is inconvenient, maintenance cost is high.Converting electric energy for the vibrational energy in ambient enviroment is wireless sensor
Power supply is a kind of very promising technology.But the commonly low alternating current of piezoelectric cantilever output high impedance, and vibration is often
It is intermittent, electronic load power supply cannot be continuously.Therefore a kind of energy management circuit is needed, efficiently manages the piezoelectricity being collected into
Energy.
Summary of the invention
In view of the above technical problems, a kind of energy management circuit collected for piezoelectric energy is proposed, it has efficient
The ability of piezoelectric energy is collected, to implement efficient Energy extraction, transmission and management to the piezoelectric energy being collected into.
The technology path that the present invention takes is: it is a kind of for piezoelectric energy collect energy management circuit include synchronization bias
Voltage overturns rectifier, DC-DC converter, mode selector, clock generator, MPPT maximum power point tracking circuit and opens
It closes.
The synchronization bias voltage overturns rectifier, is coupled to receive the electric energy from piezoelectric generator, once inspection
Measure piezoelectric generator output current zero-crossing point, just overturn the output voltage of the piezoelectric generator, at the same export with it is defeated
Enter to vibrate the square-wave signal of same frequency；
The DC-DC converter is connected to transmit by the energy of synchronization bias voltage overturning rectifier output
Into battery；
The mode selector is connected to control the operating mode of the DC-DC converter；
The clock generator is connected to generate clock signal；
The MPPT maximum power point tracking circuit is connected the open circuit electricity exported according to the synchronous switch current rectifier
Pressure, through the mode selector, provides suitable switch control signal for the DC-DC converter, to adjust the DC-DC
The input voltage of converter is to optimum value；
The open switch is connected to be periodically turned off the DC-DC converter and the synchronization bias voltage
The connection for overturning rectifier makes the synchronization bias voltage overturning rectifier generate Open Output Voltage；
Structure and working principle of the invention are described in detail below in conjunction with the drawings and specific embodiments:
Detailed description of the invention
Fig. 1 is the energy management circuit block diagram disclosed by the invention collected for piezoelectric energy；
Fig. 2 is block diagram of the energy management circuit work disclosed by the invention under low-power consumption mode；
Fig. 3 is the block diagram of energy management circuit work disclosed by the invention in charging mode；
Specific embodiment
As shown in Figure 1, a kind of energy management circuit collected for piezoelectric energy, it is characterised in that: including synchronization bias
Voltage overturning rectifier, DC-DC converter, mode selector, clock generator, MPPT maximum power point tracking circuit and open circuit are opened
It closes.The energy management circuit collected for piezoelectric energy overturns rectifier output voltage V according to synchronization bias voltagerectWith
Cell voltage VbattThe case where, it is worked respectively in low-power consumption, is charged under the operating mode different with three kinds of MPPT maximum power point tracking.
Low-power consumption mode:
Fig. 2 is the circuit mould that the energy management circuit work collected for piezoelectric energy activates under low-power consumption mode
Block and corresponding signal.It is not enough to charge to battery by the energy that piezoelectric generator generates in this mode, as shown in Figure 1 opens
Way switch M1It is turned off, the connection between cutting synchronization bias voltage overturning rectifier and DC-DC converter, by synchronization bias
The energy that voltage overturning rectifier is collected is stored in capacitor CrectIn.Synchronization bias voltage overturns rectifier by VrectIt is supplied
Electricity, if capacitance voltage VrectToo low to start synchronization bias voltage overturning rectifier, synchronization bias voltage overturns rectifier
Into cold start, piezoelectric energy is collected, with VrectIt rises to such as 1V, synchronization bias voltage overturning rectifier is detached from cold opens
It is dynamic, execute the overturning of synchronization bias voltage and rectifying operation.Due to having used synchronization bias voltage turnover technology, voltage VrectFaster
Speed rises.Mode selector is by VrectPower supply, compares VrectWith pre-set threshold voltage VLOW_POWERIf VrectLower than institute
Threshold voltage is stated, " CHARGE_MODE " and " MPPT_MODE " signal is all set to 0, makes corresponding DC-DC converter and maximum
Power points tracking circuit fails.
Charge mode:
Fig. 3 is the circuit module that the energy management circuit work collected for piezoelectric energy activates in charging mode
With corresponding signal.Capacitor C in this moderectThe energy of storage is sufficiently high can to charge to battery, but cell voltage Vbatt
It is also too low to power for MPPT maximum power point tracking circuit.Mode selector detects whether to meet Vrect>VLOW_POWERAnd Vbatt<
VMPPT, wherein VLOW_POWERWith VMPPTIt is preset threshold voltage.If condition meets, " CHARGE_MODE ", which is arranged, in circuit believes
Number for height, activate DC-DC converter module.Open switch M1 closure as shown in Figure 1, DC-DC converter, which is connected to, to be synchronized partially
Set voltage overturning rectifier.DC-DC converter is configured to asynchronous work mode, and operates under discontinuous conduction mode.Gu
Determine the PH1_G signal driving DC-DC converter of frequency fixed duty cycle.Therefore, energy management circuit work is in no maximum power
In the case where point tracking.Notice that all modules are by V under the moderectPower supply.
As circuit enters charge mode, DC-DC converter starts to extract capacitor CrectIn energy, lead to capacitance voltage
VrectDecline.Therefore VrectIt is likely lower than pre-set voltage VLOW_POWER, return to low-power consumption mode.This feelings in order to prevent
Condition, in comparison voltage VrectAnd VLOW_POWERWhen comparator should have lag function.For example, working as VLOW_POWERUpper lower threshold value point
When not being set as 1.5V and 2V, work as VrectCircuit enters charge mode when > 2V, and works as VrectCircuit enters low-power consumption mould when < 1.5V
Formula.
MPPT maximum power point tracking mode:
Finally, if Vrect>VLOW_POWER, and Vbatt>VMPPTWhen, circuit enters MPPT maximum power point tracking mode.It is stored in
Capacitor CrectIn energy it is sufficiently high can charge to battery, and cell voltage also it is sufficiently high can to MPPT maximum power point tracking electricity
Road power supply.Mode selector activation all modules as shown in Figure 1 include MPPT maximum power point tracking circuit.MPPT_CLK_G letter
Number control open switch M1 make DC-DC converter disconnects at regular intervals with synchronization bias voltage overturn rectifier connection.
DC-DC converter is configured to the mode of working asynchronously to reduce the conduction loss of diode, and operates in discontinuous conduction mode
Under.Notice comparatively DC-DC converter diode current flow loss under the asynchronous condition of charge mode is smaller.Make
With frequency hopping modulation method, V is setrectVoltage is a score ratio of open-circuit voltage, and it is whole to be equivalent to adjusting synchronization bias voltage overturning
Flow the optimal resistance load of device module.
When circuit enters MPPT maximum power point tracking mode, MPPT maximum power point tracking circuit is activated and is battery powered, this
When circuit simultaneously have synchronization bias voltage overturn and MPPT maximum power point tracking, so piezoelectric energy can be collected efficiently.Equally, it is
Detect VbattVoltage, the comparator in mode selector will have lag function, such as set voltage VMPPTUpper and lower bound voltage difference
It is 2.3V and 2.5V.
Although the embodiment of the present invention relatively limited quantity is described, the skill of this field publicly disclosed herein that is benefited
Art personnel will be understood that resulting numerous modifications and variations.Appended claims be intended to cover to belong to true spirit of the present invention and
Such modifications and variations of range.
Claims (2)
1. a kind of energy management circuit collected for piezoelectric energy, it is characterised in that: overturn and rectify including synchronization bias voltage
Device, DC-DC converter, mode selector, clock generator, MPPT maximum power point tracking circuit and open switch；
The synchronization bias voltage overturns rectifier, is coupled to receive the electric energy from piezoelectric generator, once it detects
The piezoelectric generator exports current zero-crossing point, just overturns the output voltage of the piezoelectric generator, while exporting and shaking with input
The square-wave signal of dynamic same frequency；
The DC-DC converter is connected to transmit the energy exported by synchronization bias voltage overturning rectifier to electricity
Chi Zhong；
The mode selector is connected to control the operating mode of the DC-DC converter；
The clock generator is connected to generate clock signal；
The MPPT maximum power point tracking circuit is connected the open-circuit voltage exported according to the synchronous switch current rectifier,
Through the mode selector, suitable switch control signal is provided for the DC-DC converter, is turned to adjust the DC-DC
The input voltage of parallel operation is to optimum value.
The open switch is connected to be periodically turned off the DC-DC converter and the synchronization bias voltage and overturn
The connection of rectifier makes the synchronization bias voltage overturning rectifier generate Open Output Voltage；
2. a kind of energy management circuit collected for piezoelectric energy as described in claim 1, when the synchronization bias voltage
When overturning rectifier output voltage less than the first predetermined threshold value voltage, circuit works under low-power consumption mode, in addition to the synchronization
Outside bias voltage overturning rectifier and mode selector are activated, other circuit modules are closed；When the synchronization bias electricity
Pressure turns rectifier output voltage greater than the first predetermined threshold value voltage, but the DC-DC converter output voltage is pre- less than second
If when threshold voltage, circuit works in charging mode, other than the MPPT maximum power point tracking circuit is not activated, other electricity
Road is activated；When the synchronous switch rectifier output voltage is greater than the first predetermined threshold value voltage, and the DC-DC converter
Output voltage be greater than the second predetermined threshold value voltage when, all circuit modules are all activated at this time, into maximum power point with
Track mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910263626.4A CN110071563A (en) | 2019-04-02 | 2019-04-02 | A kind of energy management circuit collected for piezoelectric energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910263626.4A CN110071563A (en) | 2019-04-02 | 2019-04-02 | A kind of energy management circuit collected for piezoelectric energy |
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| CN110071563A true CN110071563A (en) | 2019-07-30 |
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| CN201910263626.4A Pending CN110071563A (en) | 2019-04-02 | 2019-04-02 | A kind of energy management circuit collected for piezoelectric energy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713765A (en) * | 2020-12-23 | 2021-04-27 | Oppo（重庆）智能科技有限公司 | Energy collection management circuit and energy collection management method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787088A (en) * | 2017-01-18 | 2017-05-31 | 西北工业大学 | It is applied to the self powered supply management circuit of discontinuous piezoelectric energy acquisition system |
| CN106953534A (en) * | 2017-04-27 | 2017-07-14 | 电子科技大学 | A kind of efficient piezoelectric energy Acquisition Circuit based on biasing upset rectification |
-
2019
- 2019-04-02 CN CN201910263626.4A patent/CN110071563A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787088A (en) * | 2017-01-18 | 2017-05-31 | 西北工业大学 | It is applied to the self powered supply management circuit of discontinuous piezoelectric energy acquisition system |
| CN106953534A (en) * | 2017-04-27 | 2017-07-14 | 电子科技大学 | A kind of efficient piezoelectric energy Acquisition Circuit based on biasing upset rectification |
Non-Patent Citations (1)
| Title |
|---|
| 吴了: "基于压电能量收集的集成电路的研究与设计", 《中国博士学位论文全文数据库 信息科技辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713765A (en) * | 2020-12-23 | 2021-04-27 | Oppo（重庆）智能科技有限公司 | Energy collection management circuit and energy collection management method |
| CN112713765B (en) * | 2020-12-23 | 2022-04-19 | Oppo（重庆）智能科技有限公司 | Energy collection management circuit and energy collection management method |
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