CN112615563A - Self-powered piezoelectric energy collection interface circuit with wide output voltage range and capable of synchronously overturning voltage - Google Patents
Self-powered piezoelectric energy collection interface circuit with wide output voltage range and capable of synchronously overturning voltage Download PDFInfo
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- CN112615563A CN112615563A CN202011432313.6A CN202011432313A CN112615563A CN 112615563 A CN112615563 A CN 112615563A CN 202011432313 A CN202011432313 A CN 202011432313A CN 112615563 A CN112615563 A CN 112615563A
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- 239000003990 capacitor Substances 0.000 claims abstract description 24
- 230000001360 synchronised effect Effects 0.000 claims abstract description 22
- 238000003306 harvesting Methods 0.000 claims description 9
- 230000001939 inductive effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 230000007306 turnover Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000013256 coordination polymer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- H02N2/181—Circuits; Control arrangements or methods
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/066—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode particular circuits having a special characteristic
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a self-powered piezoelectric energy collection interface circuit with wide output voltage range and voltage synchronous turnover. A self-powered piezoelectric energy collection interface circuit with wide output voltage range and voltage synchronous turnover comprises a full-bridge circuit, a triode, a capacitor and an inductor.
Description
Technical Field
The invention mainly relates to a self-powered piezoelectric energy collection interface circuit with wide output voltage range and voltage synchronous turnover.
Background
Due to the inherent output impedance characteristics of piezoelectric generators, dedicated interface circuits are required. The typical synchronous switch inductance technology can effectively reduce the waste of the output charges of the piezoelectric generator in the rectification process and improve the output power of the load. The main working principle is that when the output current of the piezoelectric generator passes through a zero point or is close to the peak value of the output voltage, the synchronous switch is closed briefly, and the resonant cavity formed by the external inductor and the internal capacitor of the piezoelectric generator is used for collecting the charges which are wasted, so that the power from the piezoelectric generator to the load is increased. However, typical synchronous switched inductor technology suffers from one drawback: when the output rectified voltage of the interface circuit is too high, the load may not be able to obtain power from the piezoelectric generator, resulting in a narrow operating range of the output voltage. Such a situation where the load does not collect power often occurs under varying excitation conditions of vibration. Therefore, it is necessary to design an efficient piezoelectric energy harvesting interface circuit with a wide output voltage range, which can realize efficient piezoelectric energy harvesting with voltage synchronous inversion even under the condition that the rectified voltage is very high.
Disclosure of Invention
In order to solve the problems, a self-powered piezoelectric energy collection interface circuit with wide output voltage range and voltage synchronous turnover is provided. The solution is as follows: a self-powered piezoelectric energy harvesting interface circuit with voltage synchronous inversion of wide output voltage range is characterized in that: the circuit comprises a full-bridge circuit, a triode, a capacitor and an inductor; the piezoelectric generator and the inductor are connected in series and connected to the alternating current input end of the full-bridge circuit; the direct current output end of the full-bridge circuit is connected with a filter capacitor and a load resistor; the full-bridge circuit consists of four diodes; the diode can be a passive diode or an active diode; the triode comprises two NPN tubes Q1And Q3And two PNP tubes Q2And Q4(ii) a The capacitor is a capacitor C1(ii) a The triode and the capacitor form a detection circuit, so that the peak value of the output voltage of the piezoelectric generator can be detected, and the peak value of the inductive current can also be detected. The NPN tube Q3And PNP tube Q4Diodes D as synchronous switches respectively bridged in the full-bridge circuit3And a diode D4Both ends of (a); one end of the alternating current input of the full-bridge circuit is connected with one end of the inductor; the other end of the inductor is connected with one end of the piezoelectric generator and is connected to an NPN tube Q1Base electrode and PNP tube Q2A base electrode of (1); the NPN tube Q1And the PNP tube Q2Is transmitted byThe electrodes are connected with the capacitor C1One end of the two ends are connected; the capacitor C1The other end of the piezoelectric generator is connected with the other end of the piezoelectric generator; the NPN tube Q1The collector and the PNP tube Q4The base electrodes are connected; PNP pipe Q2Collector and said NPN tube Q3The base electrodes are connected; the NPN tube Q3The collector of the full-bridge circuit is connected with the direct current output end of the full-bridge circuit; PNP pipe Q4The collector of (a) is connected with the ground; the NPN tube Q3Emitter and PNP tube Q4Is connected to said capacitor C1And the other end of the same.
The invention provides a self-powered piezoelectric energy collection interface circuit with wide output voltage range and voltage synchronous turnover, which has the advantages that:
1. the circuit is simple;
2. a wide output voltage range;
3. self-powered.
Drawings
FIG. 1 is a self-powered piezoelectric energy harvesting interface circuit with voltage synchronous flipping with a wide output voltage range as disclosed herein;
FIG. 2 is a schematic diagram of the key waveforms of the disclosed self-powered piezoelectric energy harvesting interface circuit with voltage synchronous inversion with wide output voltage range operating in P-SSHI mode;
FIG. 3 is a schematic diagram of the key waveforms of the disclosed self-powered piezoelectric energy harvesting interface circuit with voltage synchronous inversion with wide output voltage range operating in S-SSHI mode;
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
FIG. 1 is a diagram of a self-powered piezoelectric energy harvesting interface circuit with voltage-synchronous switching over a wide output voltage range according to the present invention. According to the piezoelectric voltage V per half vibration periodBAWhether or not it is rectified voltage VrectThe clamping circuit has two working modes. If the piezoelectric voltage is rectified by a rectified voltage VrectClamping, operating the circuit in P-SSHI mode, otherwise S-SSHIMode(s). The operation of the self-powered piezoelectric energy harvesting interface circuit with voltage-synchronous flipping over a wide output voltage range is described in detail below.
If the circuit is operating in P-SSHI mode, referring to the key waveforms of fig. 2, the operation of the circuit is described as follows:
1. output alternating current i at piezoelectric generatorPBefore the zero point is crossed from positive to negative, namely the output voltage of the piezoelectric generator is not up to the peak value, the piezoelectric voltage is clamped, and the diode D1And D4Conduction, current iPWarp device (piezoelectric generator-L-D)1–D4) Inflow load RLAnd CLFor NPN tube Q1A base-emitter PN junction of the capacitor C is forward biased to be conducted1Is connected with the piezoelectric generator in parallel through a PN junction;
2. when current iPAfter the zero crossing point, i.e. after the output voltage of the piezoelectric generator is over-peak, due to the current iPThe voltage of the internal capacitor of the piezoelectric generator is lower than that of the capacitor C1Voltage on, resulting in an NPN transistor Q1Base-emitter PN junction reverse bias PNP tube Q2The base electrode-the emitter electrode of the transistor are positively biased to be conducted, thereby enabling the triode Q3Conducting to form two resonant circuits, one being a pass device (piezoelectric generator-L-D)1–Q3Piezoelectric generator) and the other is a resonant circuit via a device (C)1–Q2–L–D1–Q3–C1) The internal capacitance C of the resonant circuitPAnd a capacitor C1The stored energy is transmitted to the inductor, the inductor current rises, and when the capacitor energy is completely transmitted to the inductor, the piezoelectric voltage VBADrops to near zero;
3. when the inductor current iLReaches a peak value due to the inductive voltage and the piezoelectric voltage VBAAre all close to zero, resulting in Q3Cut off to form another channel device (piezoelectric generator-L-D)1–RLAnd CL–D4Piezoelectric generator), a part of the energy in the inductance is transferred to the load through the resonant circuit, and another part is transferred back to the internal capacitance CPAt a capacitor CPThe desired voltage synchronous inversion is realized by forming voltage inversion, and when the inductive current i is included in the loop, the diode is includedLThe loop is broken after dropping to zero. Note that step 3 is an innovation of this patent.
4. Piezoelectric generator current iPContinue to reverse direction to internal capacitance CPCharging up to a piezoelectric voltage VBAUp to rectified voltage VrectClamping, at this time, diode D2And D3Conduction, piezoelectric current iPInflow load CLAnd RL。
5. When the piezoelectric generator current iPWhen the circuit passes through the zero point from negative to positive, due to the symmetrical circuit structure, the circuit executes the voltage synchronous turning process based on the same operation principle, but uses different resonant circuits;
6. when current iPWhen the zero point is crossed from positive to negative again, the circuit returns to the working state of the serial number 1, and the operation process is repeated.
If the circuit operates in the S-SSHI mode, the specific operation process of the circuit is substantially similar to that of the P-SSHI with reference to the key waveforms shown in FIG. 3, and thus is not repeated. The main difference from the P-SSHI mode of operation is the piezoelectric voltage VBAVoltage V no longer rectifiedrectAnd (4) clamping. Therefore, the circuit working in the S-SSHI mode, the full bridge circuit is enabled only in the voltage synchronous overturning stage.
Typical synchronous switched inductor technology is limited in the operating range of the rectified voltage of the circuit by the open circuit voltage of the piezoelectric generator, since only one resonant tank is used to achieve voltage reversal. Different from a typical synchronous switch inductor technology, the circuit provided by the patent adopts two resonance loops instead of one resonance loop to realize the turnover of the internal capacitance voltage of the piezoelectric generator in each half vibration period, and the step-up operation of the piezoelectric voltage can be realized by using one more resonance loop, namely step 3. Even if the rectified voltage is very high, the circuit can extract energy from the piezoelectric generator and transmit the energy to a load, so that the operation range of the rectified voltage is greatly expanded, and the problem that the output power of the piezoelectric generator cannot be extracted by a typical synchronous switching technology is solved. It should be noted that the circuit operates in either the P-SSHI mode or the S-SSHI mode, and an extra resonant tank is used, so that the boosting operation is suitable for the full operation mode.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having the benefit of this disclosure, will appreciate numerous modifications and variations therefrom. It is intended that the appended claims cover such modifications and variations as fall within the true spirit and scope of this present invention.
Claims (1)
1. A self-powered piezoelectric energy harvesting interface circuit with voltage synchronous inversion of wide output voltage range is characterized in that: the circuit comprises a full-bridge circuit, a triode, a capacitor and an inductor; the piezoelectric generator and the inductor are connected in series and connected to the alternating current input end of the full-bridge circuit; the direct current output end of the full-bridge circuit is connected with a filter capacitor and a load resistor; the full-bridge circuit consists of four diodes; the diode can be a passive diode or an active diode; the triode comprises two NPN tubes Q1And Q3And two PNP tubes Q2And Q4(ii) a The capacitor is a capacitor C1(ii) a The triode and the capacitor form a detection circuit, so that the peak value of the output voltage of the piezoelectric generator can be detected, and the peak value of the inductive current can also be detected; the NPN tube Q3And PNP tube Q4Diodes D as synchronous switches respectively bridged in the full-bridge circuit3And a diode D4Both ends of (a); one end of the alternating current input of the full-bridge circuit is connected with one end of the inductor; the other end of the inductor is connected with one end of the piezoelectric generator and is connected to an NPN tube Q1Base electrode and PNP tube Q2A base electrode of (1); the NPN tube Q1And the PNP tube Q2Is connected with the capacitor C1One end of the two ends are connected; the capacitor C1The other end of the piezoelectric generator is connected with the other end of the piezoelectric generator; the NPN tube Q1The collector and the PNP tube Q4The base electrodes are connected; PNP pipe Q2Collector and NPN tubeQ3The base electrodes are connected; the NPN tube Q3The collector of the full-bridge circuit is connected with the direct current output end of the full-bridge circuit; PNP pipe Q4The collector of (a) is connected with the ground; the NPN tube Q3Emitter and PNP tube Q4Is connected to said capacitor C1And the other end of the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432313.6A CN112615563A (en) | 2020-12-10 | 2020-12-10 | Self-powered piezoelectric energy collection interface circuit with wide output voltage range and capable of synchronously overturning voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432313.6A CN112615563A (en) | 2020-12-10 | 2020-12-10 | Self-powered piezoelectric energy collection interface circuit with wide output voltage range and capable of synchronously overturning voltage |
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| Publication Number | Publication Date |
|---|---|
| CN112615563A true CN112615563A (en) | 2021-04-06 |
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| CN202011432313.6A Pending CN112615563A (en) | 2020-12-10 | 2020-12-10 | Self-powered piezoelectric energy collection interface circuit with wide output voltage range and capable of synchronously overturning voltage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113395016A (en) * | 2021-08-05 | 2021-09-14 | 合肥工业大学智能制造技术研究院 | Piezoelectric energy collection system based on inductance |
| CN113556045A (en) * | 2021-07-30 | 2021-10-26 | 山东大学 | Self-powered piezoelectric energy collection interface circuit without secondary overturning |
-
2020
- 2020-12-10 CN CN202011432313.6A patent/CN112615563A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113556045A (en) * | 2021-07-30 | 2021-10-26 | 山东大学 | Self-powered piezoelectric energy collection interface circuit without secondary overturning |
| CN113395016A (en) * | 2021-08-05 | 2021-09-14 | 合肥工业大学智能制造技术研究院 | Piezoelectric energy collection system based on inductance |
| CN113395016B (en) * | 2021-08-05 | 2024-03-29 | 合肥工业大学智能制造技术研究院 | Piezoelectric energy collection system based on inductance |
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