CN107171593A - Vibrational energy Acquisition Circuit - Google Patents
Vibrational energy Acquisition Circuit Download PDFInfo
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- CN107171593A CN107171593A CN201710439078.7A CN201710439078A CN107171593A CN 107171593 A CN107171593 A CN 107171593A CN 201710439078 A CN201710439078 A CN 201710439078A CN 107171593 A CN107171593 A CN 107171593A
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Classifications
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- 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
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- 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
Abstract
The present invention relates to a kind of vibrational energy Acquisition Circuit, including energy converter, first switch circuit, second switch circuit, the 3rd on-off circuit, auxiliary circuit and carry circuit, energy converter connection first switch circuit, auxiliary circuit and second switch circuit, the first electric node of auxiliary circuit connection first switch circuit formation, the electric node of connection second switch circuit formation second, the electric node of 3rd on-off circuit connection first, the second electric node and carry circuit, carry circuit connection load；First switch circuit, the 3rd on-off circuit and auxiliary circuit composition a pair of construction of switch, the electric signal that the first direction of the getable ac signal of vibration is changed to energy converter is acquired, auxiliary circuit, the 3rd on-off circuit and second switch circuit constitute another biswitch structure, to the electrical signal collection of the second direction of ac signal, carry circuit carries out supply load after energy stores；In this way, power output is not undergone mutation with the resistance of load, energy extraction efficiency is high.
Description
Technical field
The present invention relates to energy acquisition technical field, more particularly to a kind of vibrational energy Acquisition Circuit.
Background technology
Various energy, such as wind energy, solar energy, vibrational energy, radio frequency energy etc., energy are there is in large natural environment
The energy that collector can be gathered in environment is converted to electric energy；Because wind energy, solar energy, radio frequency energy are by environment, the shadow of weather
Ring, thus the application of vibrational energy is more extensive.
The acquisition mode of vibrational energy typically has three kinds：Electromagnetic type, electrostatic, piezoelectric type, these three have oneself feature
With specific application area.Traditional standard energy collector generally includes piezoelectric ceramics PZT, rectifier bridge rectification, capacitor filtering three
Individual part, piezoelectric ceramics PZT, which is applied in after vibration, produces alternating current, and the rectifier bridge that alternating current is constituted by diode becomes direct current
Electricity, then electric capacity becomes voltage stabilizing after filtering, is used for load.However, the energy collecting device of this structure is only in the negative of connection
When carrying as optimal load, power output can be only achieved maximum, therefore electric energy conversion efficiency is low, so that energy extraction efficiency is low.
The content of the invention
Based on this, it is necessary to for traditional standard energy collector energy extraction efficiency it is low the problem of there is provided a kind of energy
Measure the high vibrational energy Acquisition Circuit of extraction efficiency.
A kind of vibrational energy Acquisition Circuit, including energy converter, first switch circuit, second switch circuit, the 3rd open
Powered-down road, auxiliary circuit and carry circuit, the energy converter connect the first switch circuit, the auxiliary circuit and institute
Second switch circuit is stated, the auxiliary circuit connects the electric node of the first switch circuit formation first, and the auxiliary circuit connects
The electric node of the second switch circuit formation second is connect, the 3rd on-off circuit connects the described first electric node and described respectively
Second electric node, and the carry circuit is connected, the carry circuit, which is used to connect, to be loaded；
The first switch circuit, the 3rd on-off circuit and the auxiliary circuit constitute the first biswitch structure, institute
State auxiliary circuit, the 3rd on-off circuit and the second switch circuit and constitute the second biswitch structure, the energy conversion
Vibrational energy is converted to ac signal by device, first pair after conducting of the electric signal of the first direction of the ac signal
Construction of switch reaches the carry circuit, and second pair after conducting of the electric signal of the second direction of the ac signal opens
Energy is shifted to the load after closing the structure arrival carry circuit, the carry circuit storage energy.
Above-mentioned vibrational energy Acquisition Circuit, first switch circuit, the 3rd on-off circuit and auxiliary circuit constitute one pair and opened
Structure is closed, the electric signal that the first direction of the getable ac signal of vibration is changed to energy converter is acquired, simultaneously
Auxiliary circuit, the 3rd on-off circuit and second switch circuit constitute another biswitch structure, to the second party of ac signal
To electric signal be acquired, the electric signal of two biswitch structures collection by carry circuit supply after energy stores negative
Carry；By using the circuit of biswitch structure, the power output of vibrational energy Acquisition Circuit can be held essentially constant, not with load
Resistance undergo mutation, therefore optimum load interval is broader, and energy conversion efficiency is high, so as to improve energy extraction efficiency.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of vibrational energy Acquisition Circuit in an embodiment；
Fig. 2 is the circuit structure diagram of traditional energy collecting device；
Fig. 3 is the piezoelectric voltage, displacement bimorph, the oscillogram of piezoelectric current at piezoelectric ceramics two ends；
Fig. 4 is that the numerical value of component parameter in an application examples sets schematic diagram；
Fig. 5 is that the voltage characteristic of an application examples Plays Energy extraction circuit and double synchro switch inductance extraction circuits is contrasted
Figure；
Fig. 6 is that the power contrast of an application examples Plays Energy extraction circuit and double synchro switch inductance extraction circuits schemes.
Embodiment
With reference to Fig. 1, the vibrational energy Acquisition Circuit in an embodiment, including energy converter 110, first switch circuit
120th, auxiliary circuit 130, second switch circuit 140, the 3rd on-off circuit 150 and carry circuit 160.Energy converter 110 connects
Connect first switch circuit 120, auxiliary circuit 130 and second switch circuit 140, the connection first switch of auxiliary circuit 130 circuit 120
The first electric node J1 is formed, the connection second switch of auxiliary circuit 130 circuit 140 forms the second electric node J2, the 3rd on-off circuit
The 150 electric node J2 of the first electricity node J1 of connection and second, and connection carry circuit 160 respectively, carry circuit 160 is used to connect
Load RL.
First switch circuit 120, the 3rd on-off circuit 150 and auxiliary circuit 130 constitute the first biswitch structure, auxiliary electricity
Road 130, the 3rd on-off circuit 150 and second switch circuit 140 constitute the second biswitch structure, and energy converter 110 will vibrate
Ac signal can be converted to, the first biswitch structure of the electric signal of the first direction of ac signal after conducting is reached
Carry circuit 160, the second biswitch structure of the electric signal of the second direction of ac signal after conducting reaches transfer electricity
Energy is shifted after road 160, the storage energy of carry circuit 160 to loading RL.
Wherein, the getable ac signal of the conversion of energy converter 110 vibration includes the cycle letter of positive and negative both direction
Number.Specifically, energy converter 110 is provided with anode and negative terminal, first switch circuit 120, auxiliary circuit 130 and second switch electricity
The port of the connection of road 140 energy converter 110 determines that the first direction and second direction of ac signal are just or negative.Example
Such as, if anode, the auxiliary circuit 130 of first switch circuit 120 and the connection energy converter 110 of second switch circuit 140 are connected
The negative terminal of energy converter 110, then the electric signal of the first direction of ac signal is the electric signal of positive direction, correspondence second party
To electric signal be negative direction electric signal, as shown in Figure 1；If first switch circuit 120 and the connection energy of second switch circuit 140
Negative terminal, the electricity of the anode, the then first direction of ac signal of the connection energy converter 110 of auxiliary circuit 130 of energy converter
Signal is the electric signal of negative direction, and the electric signal of correspondence second direction is the electric signal of positive direction.
Above-mentioned vibrational energy Acquisition Circuit, first switch circuit 120, the 3rd on-off circuit 150 and auxiliary circuit 130 are constituted
One biswitch structure, the electric signal that the first direction of the getable ac signal of vibration is changed to energy converter 110 enters
Row collection, while auxiliary circuit 130, the 3rd on-off circuit 150 and second switch circuit 140 constitute another biswitch structure,
The electric signal of the second direction of ac signal is acquired, the electric signal of two biswitch structure collections is by carry circuit
160 carry out supply load RL after energy stores；By using the circuit of biswitch structure, the output work of vibrational energy Acquisition Circuit
Rate can be held essentially constant, and not undergone mutation with load RL resistance, therefore optimum load interval is broader, energy conversion efficiency
Height, so as to improve energy extraction efficiency.
In addition, the output voltage of above-mentioned vibrational energy Acquisition Circuit and power output are than traditional vibrational energy Acquisition Circuit
Output voltage and power output it is higher, application advantage becomes apparent in energy acquisition；The vibrational energy of biswitch structure is adopted
Collector also has the advantages that to be more suitable for low thermocouple conjunction state, is adapted to battery charging.
In one embodiment, the electric signal output of first direction is to first switch circuit 120, and first switch circuit 120 exists
The voltage magnitude of the electric signal of first direction is turned on when meeting the first preparatory condition and output voltage is to the 3rd on-off circuit 150,
3rd on-off circuit 150 when the voltage of input meets the second preparatory condition conducting and output voltage to carry circuit 160 and auxiliary
Circuit 130 is helped, now the first biswitch structure is turned on, carry circuit 160 is carried out energy stores；3rd on-off circuit 150 exists
The voltage of input disconnects when meeting default cut-off condition.
Wherein, the first preparatory condition, the second preparatory condition and default cut-off condition are according to the circuit elements device selected in circuit
The numerical value and circuit structure of part are predefined, such as, the first preparatory condition, the second preparatory condition and default cut-off condition can divide
It is not some default voltage magnitude.
The electric signal of second direction is exported to the 3rd on-off circuit 150, the 3rd on-off circuit 150 by auxiliary circuit 130
When the voltage magnitude of the electric signal of second direction meets three preparatory conditions, conducting and output voltage are to carry circuit 160 and the
Two on-off circuits 140, second switch circuit 140 is turned on when the voltage of input meets four preparatory conditions, is now opened for second pair
Structure conducting is closed, carry circuit 160 is carried out energy stores；Voltage of 3rd on-off circuit 150 in the electric signal of second direction
Amplitude disconnects when meeting default cut-off condition.
Similarly, the 3rd preparatory condition and the 4th preparatory condition can be some predetermined voltage magnitude respectively.Tool
Body, the 3rd preparatory condition can be the same or different with the second preparatory condition.
The energy transfer of storage is exported and gives load RL by carry circuit 160 when the 3rd on-off circuit 150 disconnects.By turning
The energy stores of shift circuit 160, when the 3rd on-off circuit 150 disconnects by the energy of storage export to load RL, realize energy turn
Move.
In one embodiment, energy converter 110 is piezoelectric ceramics.With reference to Fig. 1, the circuit equivalent model bag of piezoelectric ceramics
Include a current source IG, clamp capacitance C together parallel with one anotherPWith equiva lent impedance RP.Piezoelectric ceramics sensitiveness is strong, can be by
Extremely faint vibrational energy is converted into electric energy, and the sensitivity of energy conversion can be improved by using piezoelectric ceramics.
In addition, the biswitch structure of above-mentioned vibrational energy Acquisition Circuit can increase the piezoelectricity amplitude of piezoelectric ceramics, make pressure
Electroceramics exports the more energy road that powers and is acquired.
By taking specific one traditional energy collecting device structure as an example, illustrate the excellent of vibrational energy Acquisition Circuit of the invention
Gesture.With reference to Fig. 2, it is the structure chart of traditional energy collecting device, exchange telecommunications and can be converted to using piezoelectric ceramics induction vibration
Number；It is the piezoelectric voltage V at piezoelectric ceramics two ends with reference to Fig. 3p, displacement bimorph u (t), I (t) oscillograms of piezoelectric current；According to
System piezoelectric vibrator system equation：
θu'(t)-CpVp' (t)=I (t) (3-1)；
The voltage and power at load RL two ends can be derived.When circuit stability, in half period, electric capacity Cr is flowed through
Charge value be zero, then the electric charge that piezoelectric ceramics comes out is equal to load obtained electric charge, can obtain：
Formula (3-1) is brought into formula (3-2) to enter, following result is obtained：
Arrangement is obtained：
By connecing, different loads, can obtain optimal load and peak power：
In formula, u (t) is the displacement bimorph of t piezoelectric ceramics, Vp(t) it is the piezoelectric electro at t piezoelectric ceramics two ends
Pressure, I (t) is the piezoelectric current of t piezoelectric ceramics；VDCFor the voltage at load RL two ends, RRLTo load RL resistance, T/2 is
The half period duration of ac signal, such as the duration shared by the electric signal of first direction；θ is piezoelectric modulus, and w is piezoelectric ceramics
Angular frequency, uMMaximum displacement during for vibration, CpFor the parasitic capacitance of piezoelectric ceramics；PSEHFor the output work at load RL two ends
Rate, RoutFor the resistance of optimal load, PmaxFor the peak power of output.
It follows that traditional energy collecting device defines optimal load and maximum power output, only in the negative of connection
When carrying as optimal load, power output can be only achieved maximum.With reference to Fig. 1, in above-mentioned vibrational energy Acquisition Circuit of the invention,
During using piezoelectric ceramics, the power of load is with the voltage expression loaded：
In formula, θ is the piezoelectric modulus of piezoelectric ceramics, and w is the angular frequency of piezoelectric ceramics, uMMaximum displacement during for vibration, Cp
For the parasitic capacitance of piezoelectric ceramics, λ is the inductance upset factor, VDSSHTo load RL voltage, PDSSHTo load RL power.
From formula, PDSSHIt is held essentially constant, that is, the power for loading RL is constant, does not occur with load RL resistance prominent
Become, energy conversion efficiency is high.In addition, when λ takes 0.8, P can be obtainedDSSHMore than Pmax, it is seen that above-mentioned vibrational energy collection electricity
The power output on road can be higher than the power output of traditional energy collecting device.
In one embodiment, with continued reference to Fig. 1, first switch circuit 120 includes first switch pipe T1, second switch pipe
T2, the first diode D1, the second diode D2 and the first charge and discharge capacitance C1.
The positive pole of first diode D1 positive pole, first switch pipe T1 control end and the second diode D2 is all connected with energy
The one end of converter 110, the first diode D1 negative pole connects the first charge and discharge capacitance C1 one end, and common port connection first is opened
Close pipe T1 input, the first charge and discharge capacitance C1 other end connection other end of energy converter 110 and auxiliary circuit 130.
First switch pipe T1 output end connection second switch pipe T2 control end, the second diode D2 negative pole connection second switch pipe
T2 input, second switch pipe T2 output end passes through the on-off circuit 150 of the first electricity node J1 connections the 3rd and auxiliary circuit
130.Specifically, in the present embodiment, the common port of the first charge and discharge capacitance C1 connections energy converter 110 and auxiliary circuit 130
Ground connection.
By using first switch pipe T1, second switch pipe T2, the first diode D1, the second diode D2 and the first charge and discharge
Electric capacity C1 constitutes first switch circuit 120, in unidirectionally arriving under conducting effect for the first diode D1 and the second diode D2, energy
The electric energy that energy converter 110 is exported is charged to the first charge and discharge capacitance C1, and the voltage magnitude of electric signal in a first direction is met
During the first preparatory condition, the first charge and discharge capacitance C1 electric discharges turn on first switch pipe T1 and second switch pipe T2, so that first
On-off circuit 120 is turned on, output voltage to the 3rd on-off circuit 150；In this way, first switch circuit 120 can be conveniently realized
Conducting control.
Specifically, first switch circuit 120 can also pass through first including the first protective resistance R1, the first diode D1 and protect
Protect resistance R1 connections energy converter 110.First protective resistance R1 plays a protective role to the circuit element connected below, can carry
The performance of high vibration energy acquisition circuit.
Specifically, the first diode T1 is PNP triode, and the second diode T2 is NPN triode.First diode T1's
Input, output end and control end are respectively the emitter stage, colelctor electrode and base stage of PNP triode；Second diode T2 input
End, output end and control end are respectively the colelctor electrode, emitter stage and base stage of NPN triode.
In one embodiment, auxiliary circuit 130 includes the 3rd diode D3, the 4th diode D5 and the first inductance L1.The
Three diode D3 positive pole connects the 4th diode D5 negative pole, and common port connects first inductance L1 one end, the 3rd diode
D3 negative pole passes through the first electric node J1 connection first switches circuit 120 and the 3rd on-off circuit 150；4th diode D5 is just
Pole passes through the second electric node J2 connection second switches circuit 140 and the 3rd on-off circuit 150；First inductance L1 other ends connection the
One on-off circuit 120 and energy converter 110, and connection second switch circuit 140.Specifically, in the present embodiment, the first inductance
One end ground connection of L1 connections energy converter 110；First inductance L1 the first charge and discharge capacitances of connection C1.
The auxiliary circuit 130 that 3rd diode D3, the 4th diode D5 and the first inductance L1 are constituted utilizes the list of diode
It can aid in carrying out energy transfer under the electric signal of first direction and the electric signal of second direction to conducting effect, it is simple in construction.Tool
Body, under the electric signal of the first direction of ac signal, output voltage passes through the four or two after the conducting of the 3rd on-off circuit 150
Pole pipe D5 and the first inductance L1；The electric signal of the first direction of ac signal is arrived by the first inductance L1, the 3rd diode D3
Up to the 3rd on-off circuit 150.
In one embodiment, second switch circuit 140 includes the 3rd switch transistor T 3, the 4th switch transistor T 4, the 5th diode
D4, the 6th diode D6 and the second charge and discharge capacitance C2.
5th diode D4 negative pole, the control end of the 4th switch transistor T 4 and the 6th diode D6 negative pole is all connected with energy
The one end of converter 110；5th diode D4 positive pole connects the output end of the 3rd switch transistor T 3, the control end of the 3rd switch transistor T 3
The input of the 4th switch transistor T 4 is connected, the input of the 3rd switch transistor T 3 passes through the second electric node J2 connections auxiliary circuit 130
With the 3rd on-off circuit 150；In the present embodiment, the input of the 3rd switch transistor T 3 specifically connects the 4th diode D5 positive pole.
The output end of 4th switch transistor T 4 connects the 6th diode D6 positive pole, and common port connects second charge and discharge capacitance C2 one end,
The second charge and discharge capacitance C2 other ends are connected in auxiliary circuit 130, the present embodiment, the second charge and discharge capacitance C2 specifically connections first
The one end of inductance L1 away from the 3rd diode D3 and the 4th diode D5.
By using the 3rd switch transistor T 3, the 4th switch transistor T 4, the 5th diode D4, the 6th diode D6 and the second charge and discharge
Electric capacity C2 constitutes second switch circuit 120, it is convenient to realize the conducting control of second switch circuit 140, and simple in construction.
Specifically, second switch circuit 140 also includes the second protective resistance R2, and the 6th diode D6 negative pole passes through second
Protective resistance R2 connections energy converter 110.First protective resistance R2 plays a protective role to the circuit element connected below, can
Further improve the performance of vibrational energy Acquisition Circuit.
In one embodiment, the 3rd on-off circuit 150 includes the 5th switch transistor T 5, the 6th switch transistor T 6, the 7th diode
D7, the 8th diode D8, the 3rd charge and discharge capacitance C3 and the 3rd protective resistance R3.
7th diode D7 positive pole, the control end of the 5th switch transistor T 5 and the 8th diode D8 positive pole passes through first
Electric node J1 connection first switches circuit 120 and auxiliary circuit 130；In the present embodiment, especially by the first electric node J1 connections
Second switch pipe T2 output end and the 3rd diode D3 negative pole.7th diode D7 negative pole connects the 3rd charge and discharge capacitance
C3 one end, and common port connects the input of the 5th switch transistor T 5, the 3rd charge and discharge capacitance C3 other end passes through the second electricity
Node J2 connection second switches circuit 140, auxiliary circuit 130 and carry circuit 160；In the present embodiment, the 3rd charge and discharge capacitance
The C3 other end is especially by the diode D5 of the second electricity node J2 connections the 4th positive pole and the input of the 3rd switch transistor T 3.The
The output end of five switch transistor Ts 5 connects the control end of the 6th switch transistor T 6, and the 8th diode D8 negative pole connects the 6th switch transistor T 6
Input, the 6th switch transistor T 6 output end connection carry circuit 160.
By using the 5th switch transistor T 5, the 6th switch transistor T 6, the 7th diode D7, the 8th diode D8, the 3rd charge and discharge
Electric capacity C3 and the 3rd protective resistance R3 constitutes second switch circuit 120, it is convenient to realize the conducting of the 3rd on-off circuit 150
Control, and it is simple in construction.
In one embodiment, carry circuit 160 includes filter capacitor C4, the inductance L2 of sustained diode 9 and second.Second
In inductance L2 one end connection filter capacitor C4 one end, and common port the 3rd on-off circuit 150 of connection, the present embodiment, the second inductance
L2 and filter capacitor C4 common port specifically connect the output end of the 6th switch transistor T 6.The second inductance L2 other ends connect afterflow two
Pole pipe D9 positive pole, and common port passes through the on-off circuit 150 of the second electricity node J2 connections the 3rd, second switch circuit 140 and auxiliary
Help in circuit 130, the present embodiment, the common port of the second inductance L2 and sustained diode 9 specifically connects the 3rd charge and discharge capacitance
C3, the input of the 3rd switch transistor T 3 and the 4th diode D5 positive pole.The filter capacitor C4 other ends connect sustained diode 9
Negative pole, load RL be used for be connected in parallel on filter capacitor C4 two ends.
Second inductance L2 is used to store energy, and after the disconnection of the 3rd on-off circuit 150, the energy in the second inductance L2 passes through
Load RL is transferred to after sustained diode 9, after filtering electric capacity C4；In this way, the transfer of energy can be conveniently realized.
The whole circuit operation principle of above-mentioned vibrational energy Acquisition Circuit is：Energy converter 110 is converted to vibrational energy
The ac signal of certain frequency, the sine wave of certain amplitude.In a cycle, it is in positive half period, voltage magnitude
When change is equal to zero, i.e., displacement amplitude reaches positive maximum, also implies that piezoelectric ceramics both end voltage also reaches maximum Vp,
First charge and discharge capacitance C1 both end voltages are Vp-VD(VDRepresent diode forward conduction voltage drop)；When the capacitance voltage of piezoelectric element
It is reduced to Vp-VD-VBEWhen, (VBERepresent the pressure drop between transistor base and emitter stage), first switch pipe T1 conductings make first
Charge and discharge capacitance C1 starts electric discharge, and because the first diode D1 is present, reversely cut-off, makes the electricity at the first charge and discharge capacitance C1 two ends
Lotus flows to first switch pipe T1, so that second switch pipe T2 is turned on, current direction second switch pipe T2 makes the 3rd discharge and recharge electricity
The voltage for holding C3 two ends starts increase.When the 3rd charge and discharge capacitance C3 voltages reach maximum, the 5th switch transistor T the 5, the 6th is opened
Pipe T6 conductings are closed, the energy storage that piezoelectric ceramics is exported is in the second inductance L2, while making the voltage that piezoelectric ceramics is exported
Overturn, now the first charge and discharge capacitance C1 passes through first switch pipe T1, second switch pipe T2, the 8th diode D8, the 6th
Switch transistor T 6, the second inductance L2, the 4th diode D5, the first inductance L1 start electric discharge, and the 3rd charge and discharge capacitance C3 passes through the 5th
Switch transistor T 5, the 6th switch transistor T 6, the second inductance L2 start electric discharge；After energy transfer is complete, the 3rd on-off circuit 150 disconnects, storage
In the presence of the energy in the second inductance L2 by sustained diode 9, then electric capacity C4 is transferred on load RL after filtering.
In negative half-cycle, when voltage magnitude becomes cancellation, i.e. displacement reaches the maximum of opposite direction, means simultaneously
The voltage at piezoelectric ceramics two ends reaches the numerical value maximum of negative direction, and electric current flows through the first inductance L1, the 3rd diode D3.Work as electricity
When pressure amplitude value meets three preparatory conditions, the 5th switch transistor T 5, the 6th switch transistor T 6 are turned on, current direction the second inductance L2, then
By the second open circuit 140, when the voltage at piezoelectric ceramics two ends increases to-(Vp-VD-VBE) when, the 3rd switch transistor T the 3, the 4th is opened
Pipe T4 conductings are closed, now the second charge and discharge capacitance C2 passes through the first inductance L1, the 3rd diode D3, the 8th diode D8, the 6th
Switch transistor T 6, the second inductance L2, the 3rd switch transistor T 3, the 4th switch transistor T 4 start electric discharge；3rd charge and discharge capacitance C3 passes through
Five switch transistor Ts 5, the 6th switch transistor T 6, the second inductance L2 start electric discharge, while piezoelectric ceramics and the second inductance L2 constitute loop,
Transfer energy into the second inductance L2, and overturn piezoelectric ceramics both end voltage；After energy transfer is complete, the 3rd switch
Circuit 150 disconnects, and is stored in the energy in the second inductance L2 by sustained diode 9, then electric capacity C4 after filtering, is transferred to
Load on RL.
For the advantage of above-mentioned vibrational energy Acquisition Circuit is better described, an application examples gathers electricity using above-mentioned vibrational energy
Road and traditional energy collecting device carry out experiment test, are completed in Tina softwares.In the equivalent model that energy converter is set
Current source IG amplitude is 80uA, frequency 50HZ, and component parameter is set as shown in figure 4, traditional energy collecting device is standard
Energy extraction circuit, vibrational energy Acquisition Circuit of the invention is double synchro switch inductance extraction circuits, and test respectively is marked
Quasi-energy extracts circuit with the voltage of double synchro switch inductance extraction circuits with voltage characteristic such as Fig. 5 institutes during load RL changes
Show, and test obtain power with load RL change characteristic it is as shown in Figure 6.It follows that the vibrational energy collection of the present invention
The energy collecting device output voltage that the voltage ratio of circuit output is traditional is high and good in power stability.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of vibrational energy Acquisition Circuit, it is characterised in that including energy converter, first switch circuit, second switch electricity
Road, the 3rd on-off circuit, auxiliary circuit and carry circuit, the energy converter connects the first switch circuit, described auxiliary
Circuit and the second switch circuit are helped, the auxiliary circuit connects the electric node of the first switch circuit formation first, described
Auxiliary circuit connects the electric node of the second switch circuit formation second, and the 3rd on-off circuit connects first electricity respectively
Node and the second electric node, and the carry circuit is connected, the carry circuit, which is used to connect, to be loaded；
The first switch circuit, the 3rd on-off circuit and the auxiliary circuit constitute the first biswitch structure, described auxiliary
Circuit, the 3rd on-off circuit and the second switch circuit is helped to constitute the second biswitch structure, the energy converter will
Vibrational energy is converted to ac signal, the first biswitch of the electric signal of the first direction of the ac signal after conducting
Structure reaches the carry circuit, the second biswitch knot of the electric signal of the second direction of the ac signal after conducting
Structure, which is reached, shifts energy to the load after the carry circuit, the carry circuit storage energy.
2. vibrational energy Acquisition Circuit according to claim 1, it is characterised in that the electric signal output of the first direction
To the first switch circuit, the voltage magnitude satisfaction first of electric signal of the first switch circuit in the first direction is pre-
If simultaneously output voltage is to the 3rd on-off circuit for conducting during condition, the 3rd on-off circuit meets second in the voltage of input
Simultaneously output voltage, to the carry circuit and the auxiliary circuit, makes the carry circuit carry out energy and deposited for conducting during preparatory condition
Storage, the 3rd on-off circuit disconnects when the voltage of input meets default cut-off condition；
The electric signal of the second direction is exported to the 3rd on-off circuit, the 3rd switch electricity by the auxiliary circuit
Road conducting and output voltage is to the transfer when the voltage magnitude of the electric signal of the second direction meets three preparatory conditions
Circuit and the second switch circuit, the second switch circuit are turned on when the voltage of input meets four preparatory conditions, are made
The carry circuit carries out energy stores, and the voltage magnitude of electric signal of the 3rd on-off circuit in the second direction is met
Disconnected during the default cut-off condition；
The carry circuit exports the energy transfer of storage to the load when the 3rd on-off circuit disconnects.
3. vibrational energy Acquisition Circuit according to claim 1, it is characterised in that the first switch circuit includes first
Switching tube, second switch pipe, the first diode, the second diode and the first charge and discharge capacitance；
The positive pole of the positive pole of first diode, the control end of the first switch pipe and second diode is all connected with institute
Energy converter one end is stated, the negative pole of first diode connects one end of first charge and discharge capacitance, and common port connects
Connect the input of the first switch pipe, the other end of first charge and discharge capacitance connect the energy converter other end and
The auxiliary circuit；
The output end of the first switch pipe connects the control end of the second switch pipe, the negative pole connection of second diode
The input of the second switch pipe, the output end of the second switch pipe is opened by the described in the described first electric Node connectedness the 3rd
Powered-down road and the auxiliary circuit.
4. vibrational energy Acquisition Circuit according to claim 3, it is characterised in that the first switch circuit also includes the
One protective resistance, first diode connects the energy converter by first protective resistance.
5. vibrational energy Acquisition Circuit according to claim 1, it is characterised in that the auxiliary circuit includes the three or two pole
Pipe, the 4th diode and the first inductance；
The positive pole of 3rd diode connects the negative pole of the 4th diode, and common port connects first inductance one
End, the negative pole of the 3rd diode passes through first switch circuit described in the described first electric Node connectedness and the 3rd switch electricity
Road, the positive pole of the 4th diode connect through the described second electric Node connectedness described in second switch circuit and the described 3rd open
Powered-down road, the first inductance other end connects the first switch circuit and the energy converter, and connection described second
On-off circuit.
6. vibrational energy Acquisition Circuit according to claim 1, it is characterised in that the second switch circuit includes the 3rd
Switching tube, the 4th switching tube, the 5th diode, the 6th diode and the second charge and discharge capacitance；
Negative pole, the control end of the 4th switching tube and the negative pole of the 6th diode of 5th diode are all connected with institute
Energy converter one end is stated, the positive pole of the 5th diode connects the output end of the 3rd switching tube, the 3rd switch
The control end of pipe connects the input of the 4th switching tube, and the input of the 3rd switching tube passes through the described second electric node
Connect the auxiliary circuit and the 3rd on-off circuit；
The output end of 4th switching tube connects the positive pole of the 6th diode, and common port connects second discharge and recharge
Electric capacity one end, the second charge and discharge capacitance other end connects the auxiliary circuit.
7. vibrational energy Acquisition Circuit according to claim 6, it is characterised in that the second switch circuit also includes the
Two protective resistances, the negative pole of the 6th diode connects the energy converter by second protective resistance.
8. vibrational energy Acquisition Circuit according to claim 1, it is characterised in that the 3rd on-off circuit includes the 5th
Switching tube, the 6th switching tube, the 7th diode, the 8th diode, the 3rd charge and discharge capacitance and the 3rd protective resistance；
Positive pole, the control end of the 5th switching tube and the positive pole of the 8th diode of 7th diode pass through institute
State first switch circuit and the auxiliary circuit described in the first electric Node connectedness, the negative pole connection of the 7th diode described the
One end of three charge and discharge capacitances, and common port connects the input of the 5th switching tube, the 3rd charge and discharge capacitance it is another
One end passes through second switch circuit, the auxiliary circuit and the carry circuit described in the described second electric Node connectedness；
The output end of 5th switching tube connects the control end of the 6th switching tube, the negative pole connection of the 8th diode
The input of 6th switching tube, the output end of the 6th switching tube connects the carry circuit.
9. vibrational energy Acquisition Circuit according to claim 1, it is characterised in that the energy converter is made pottery for piezoelectricity
Porcelain.
10. the vibrational energy Acquisition Circuit according to claim any one of 1-9, it is characterised in that the carry circuit bag
Include filter capacitor, fly-wheel diode and the second inductance；
Described second inductance one end connects described filter capacitor one end, and common port connects the 3rd on-off circuit, and described the
The two inductance other ends connect the positive pole of the fly-wheel diode, and common port is opened by the described in the described second electric Node connectedness the 3rd
Powered-down road, the second switch circuit and the auxiliary circuit, the filter capacitor other end connect the fly-wheel diode
Negative pole, the load is used to be connected in parallel on the both ends of filter capacitor.
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| CN201710439078.7A CN107171593A (en) | 2017-06-12 | 2017-06-12 | Vibrational energy Acquisition Circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439078.7A CN107171593A (en) | 2017-06-12 | 2017-06-12 | Vibrational energy Acquisition Circuit |
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| CN108649834A (en) * | 2018-03-23 | 2018-10-12 | 佛山市顺德区中山大学研究院 | A kind of novel piezoelectric energy acquisition interface circuit |
| CN109004862A (en) * | 2018-08-02 | 2018-12-14 | 湖南工业大学 | A kind of low latency self-powered piezo-electric generating synchronization charge-extraction circuit |
| CN109039155A (en) * | 2018-08-15 | 2018-12-18 | 天津大学 | A kind of adaptive-biased reverse circuit for piezoelectric energy collecting device |
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| CN109039155B (en) * | 2018-08-15 | 2020-03-13 | 天津大学 | Self-adaptive bias flip circuit for piezoelectric energy collecting device |
| CN113659854A (en) * | 2021-06-28 | 2021-11-16 | 贵州电网有限责任公司 | Wireless energy-taking AC/DC converter based on series synchronous switch inductance circuit |
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Application publication date: 20170915 |