CN110544975A - single-tube constant-current constant-voltage wireless charging device and control method thereof - Google Patents
single-tube constant-current constant-voltage wireless charging device and control method thereof Download PDFInfo
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- CN110544975A CN110544975A CN201910924550.5A CN201910924550A CN110544975A CN 110544975 A CN110544975 A CN 110544975A CN 201910924550 A CN201910924550 A CN 201910924550A CN 110544975 A CN110544975 A CN 110544975A
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- 239000003990 capacitor Substances 0.000 claims abstract description 28
- 238000010280 constant potential charging Methods 0.000 claims abstract description 5
- 238000010277 constant-current charging Methods 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims description 70
- 238000005070 sampling Methods 0.000 claims description 27
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- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
the invention belongs to the technical field of electricity, and relates to a single-tube constant-current constant-voltage wireless charging device and a control method thereof.A high-frequency alternating current is applied to two ends of a transmitting coil through a first CLC resonance network, and induces currents at two ends of a receiving coil, and the currents are changed into required direct currents after passing through a second LCC resonance network, a high-frequency rectifying circuit and a filter capacitor and are supplied to a storage battery for charging; the circuit has the advantages of simple structure, low cost and high efficiency, can meet the requirement of constant-current and constant-voltage charging of the storage battery, has practical application value, and can be widely applied to the field of wireless charging.
Description
the technical field is as follows:
the invention belongs to the technical field of electricity, and relates to a single-tube constant-current constant-voltage wireless charging device and a control method thereof, in particular to a single-tube inversion inductive coupling electric energy transmission device capable of wirelessly charging a storage battery at constant current and constant voltage and a control method thereof.
background art:
at present, a full-bridge voltage type inverter circuit is mostly adopted in a main circuit topology of a constant current-constant voltage charging system based on an Inductively Coupled wireless Power Transfer (ICPT) technology, and no relevant literature for realizing constant current-constant voltage wireless charging based on a single-tube inverter circuit is available. The single-tube circuit adopts a single switching tube for inversion, has fewer switching devices, simple control, small switching loss and high reliability compared with a full-bridge inverter circuit, and does not have the direct connection problem of upper and lower bridge arms. Therefore, the constant-current and constant-voltage wireless charging device based on the single-tube circuit and the control method which are suitable for being used below kilowatt and have the advantages of simple circuit structure, low cost, high reliability and convenience for large-scale popularization have very high practical value.
The invention content is as follows:
the invention aims to overcome the defects of the prior art, make up the blank that the constant-current and constant-voltage output cannot be realized in a single-tube wireless power transmission circuit to wirelessly charge a storage battery at present, and design and provide a wireless charging device and a control method for realizing a constant-current mode to a constant-voltage mode by changing the working state of a switching tube under the condition of not changing circuit parameters.
In order to achieve the purpose, the main structure of the single-tube constant-current constant-voltage wireless charging device comprises a power frequency rectification circuit, an L1C1 filter circuit, a first CLC resonance network, a transmitting coil, a switching tube, a receiving coil, a second LCC resonance network, a high-frequency rectification circuit, a filter capacitor, a storage battery, a primary side control circuit and a secondary side control circuit; after 220V power frequency alternating current passes through a power frequency rectification and L1C1 filter circuit, the power frequency alternating current is converted into direct current, and then the direct current is inverted into high-frequency alternating current by a switching tube; high-frequency alternating current is applied to two ends of the transmitting coil through the first CLC resonant network, current is induced at two ends of the receiving coil, and the current is changed into required direct current after passing through the second LCC resonant network, the high-frequency rectifying circuit and the filter capacitor and is supplied to the storage battery for charging; rectifying 220V power frequency alternating current by power frequency rectification; the L1C1 filter circuit is a low-pass filter consisting of a first inductor and a first capacitor and used for filtering higher harmonics; the switching tube realizes high-frequency inversion of electric energy; the first CLC resonant network compensates reactive circulating current of the transmitting coil and consists of a second capacitor, a third capacitor and a second inductor; the transmitting coil transmits electric energy to the receiving coil due to the magnetic field coupling effect; the second LCC resonant network consists of a fourth capacitor, a fifth capacitor and a third inductor and is used for compensating reactive circulation of the receiving coil; the high-frequency rectifying circuit and the filter capacitor convert the alternating current into direct current and charge the storage battery; the primary side control circuit comprises a first single chip microcomputer control circuit, a driving circuit, a first auxiliary power supply, a first wireless communication circuit, a first voltage detection circuit and an operation state detection circuit; the driving circuit is connected with the grid electrode of the switching tube, the first auxiliary power supply is connected with the power supply, the first voltage detection circuit is connected with the drain electrode of the switching tube, and the running state detection circuit is connected with the second capacitor; the first singlechip control circuit is respectively connected with the driving circuit, the first auxiliary power supply, the first wireless communication circuit, the first voltage detection circuit and the running state detection circuit; the first auxiliary power supply supplies power to the first wireless communication circuit, the driving circuit and the first single-chip microcomputer control circuit; the first singlechip control circuit outputs a driving signal of the switching tube according to the communication signal received by the first wireless communication circuit, and the driving signal enters the driving circuit to be amplified; the operation state detection circuit is used for detecting the operation state of the circuit; the first voltage detection circuit is used for detecting the voltage at two ends of the drain-source of the main switching tube and sending a signal to the first single-chip microcomputer control circuit to display the voltage and the current on the transmitting coil and judge whether zero voltage switching-on is realized or not, and when the current on the transmitting coil flows through zero, the switching tube is controlled to be conducted to ensure that the zero voltage switching-on of the switching tube is realized; the secondary side control circuit comprises a sampling circuit, a second single-chip microcomputer control circuit, a second auxiliary power supply and a second wireless communication circuit; the sampling circuit is connected with the anode of the storage battery and is used for detecting the output voltage and the output current of the storage battery; the second singlechip control circuit is respectively connected with the sampling circuit, the second auxiliary power supply and the second wireless communication circuit; the second auxiliary power supply is connected with the inductor L3 and supplies power to the sampling circuit, the second singlechip control circuit and the second wireless communication circuit; and the second singlechip control circuit controls the second wireless communication circuit to transmit a feedback signal to the first wireless communication circuit according to the received voltage and current signal of the sampling circuit.
the invention discloses a method for realizing constant-current and constant-voltage control based on a single-tube ICPT circuit, which specifically comprises the following steps:
(1) The starting power supply supplies power to the main circuit, the first auxiliary power supply is started to respectively supply power to the first single-chip microcomputer control circuit, the driving circuit and the first wireless communication circuit, and the second auxiliary power supply is started to respectively supply power to the sampling circuit, the second single-chip microcomputer control circuit and the second wireless communication circuit;
(2) When the main circuit reaches a stable working state, the storage battery starts to be charged, the first stage of charging is constant current charging, the sampling circuit works, the second singlechip control circuit carries out AD conversion on the acquired signal, when the acquired voltage signal is judged to be lower than a preset value, the second singlechip control circuit judges and then works in a current sampling mode, and transmits data to the second wireless communication circuit to enable the second wireless communication circuit to carry out wireless communication with the first wireless communication circuit; when the first singlechip control circuit detects a signal from the first wireless communication circuit, the first singlechip control circuit adjusts the output PWM frequency of the first singlechip control circuit to enable the main circuit to work in a constant current output mode, and finely adjusts the output PWM frequency to enable the charging current for the storage battery to be stabilized at a preset value IB;
(3) When the voltage at the two ends of the storage battery reaches the voltage value output by the constant voltage mode, the voltage value is collected by the sampling circuit, is processed by the second singlechip control circuit, and transmits data to the second wireless communication circuit, so that the second wireless communication circuit is in wireless communication with the first wireless communication circuit; when the first singlechip control circuit detects a signal from the first wireless communication circuit, the first singlechip control circuit adjusts the output PWM frequency of the first singlechip control circuit to enable the main circuit to work in a constant voltage output mode, and finely adjusts the output PWM frequency to enable the charging voltage for the storage battery to be stabilized at a preset value;
(4) in the constant voltage charging stage, when the current flowing through the storage battery is detected to be reduced to be smaller than a preset minimum limit, the driving circuit stops sending the PWM pulse signal after the processing of the second singlechip control circuit, the second wireless communication circuit, the first wireless communication circuit and the first singlechip control circuit, so that the charging is finished, otherwise, the constant voltage output is continued.
Compared with the existing charging method, the charging method has the advantages of simple control, low switching loss, simple circuit structure, low cost and high efficiency, can meet the requirement of constant-current and constant-voltage charging of the storage battery, has practical application value, and can be widely applied to the field of wireless charging.
description of the drawings:
fig. 1 is a schematic diagram of the principle of the single-tube constant-current constant-voltage wireless charging device.
fig. 2 is a schematic diagram of the constant current-constant voltage output voltage and current waveforms according to the present invention.
fig. 3 is a schematic diagram of the working process of the single-tube constant-current-constant-voltage mode switching of the present invention, where UB is the voltage across the battery during charging, Uref is the voltage across the battery during the constant-current-constant-voltage mode switching, and IB is the current value flowing through the battery during charging and the set current value flowing through the battery at the end of charging.
the specific implementation mode is as follows:
the technical solution of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example (b):
The main structure of the single-tube constant-current constant-voltage wireless charging device comprises a power frequency rectifier 1, an L1C1 filter circuit 2, a first CLC resonant network 3, a transmitting coil Lp, a switching tube Q1, a receiving coil Ls, a second LCC resonant network 4, a high-frequency rectifying circuit 5, a filter capacitor C2, a primary side control circuit 6, a secondary side control circuit 7 and a storage battery 8; after passing through a power frequency rectification circuit 1 and an L1C1 filter circuit 2, a 220V power frequency alternating current Vac is converted into a direct current, and then a switching tube Q1 inverts the direct current into a high-frequency alternating current; high-frequency alternating current is applied to two ends of the transmitting coil Lp through the first CLC resonant network 3, current is induced to two ends of the receiving coil Ls, and the current is changed into required direct current after passing through the second LCC resonant network 4, the high-frequency rectifying circuit 5 and the filter capacitor C2 and is supplied to the storage battery 8 for charging; rectifying 220V power frequency alternating current Vac by a power frequency rectification 1; the L1C1 filter circuit 2 is a low-pass filter formed by connecting a first inductor L1 and a first capacitor C1 and used for filtering higher harmonics; the switching tube Q1 realizes high-frequency inversion of electric energy; the first CLC resonant network 3 compensates reactive circulating current of the transmitting coil Lp and is formed by installing and connecting a second capacitor Cp1, a third capacitor Cp2 and a second inductor L2 in an electrical principle manner; due to the magnetic field coupling effect, the transmitting coil Lp transmits electric energy to the receiving coil Ls; the second LCC resonant network 4 is formed by a fourth capacitor Cs1, a fifth capacitor Cs2 and a third inductor L3 and is used for compensating reactive circulating current of the receiving coil Ls; the high-frequency rectifying circuit 5 and the filter capacitor C2 convert the alternating current into direct current and charge the storage battery 8; the primary side control circuit 6 comprises a first singlechip control circuit 9, a drive circuit 10, a first auxiliary power supply 11, a first wireless communication circuit 12, a first voltage detection circuit 13 and an operation state detection circuit 14; the driving circuit 10 is connected with the grid electrode of the switch tube Q1, the first auxiliary power supply 11 is connected with the power supply, the first voltage detection circuit 13 is connected with the drain electrode of the switch tube Q1, and the running state detection circuit 14 is connected with the second capacitor Cp 1; the first singlechip control circuit 9 is respectively connected with the drive circuit 10, the first auxiliary power supply 11, the first wireless communication circuit 12, the first voltage detection circuit 13 and the running state detection circuit 14; the first auxiliary power supply 11 supplies power to the first wireless communication circuit 12, the driving circuit 10 and the first singlechip control circuit 9; the first singlechip control circuit 9 outputs a driving signal of the switching tube Q1 according to the communication signal received by the first wireless communication circuit 12, and the driving signal enters the driving circuit 10 for amplification; the operating state detection circuit 14 is used for detecting the operating state of the circuit; the first voltage detection circuit 13 is used for detecting the voltage at the two ends of the drain-source of the switching tube Q1, sending a signal to the first single-chip microcomputer control circuit 9, displaying the voltage and the current on the transmitting coil Lp and judging whether zero voltage switching-on is realized, and controlling the switching tube Q1 to be conducted when the current on the transmitting coil Lp flows through zero, so as to ensure that the zero voltage switching-on of the switching tube Q1 is realized; the secondary side control circuit 7 comprises a sampling circuit 15, a second singlechip control circuit 16, a second auxiliary power supply 17 and a second wireless communication circuit 18; the sampling circuit 15 is connected with the anode of the storage battery 8 and is used for detecting the output voltage and the output current of the storage battery 8; the second singlechip control circuit 16 is respectively connected with the sampling circuit 15, the second auxiliary power supply 17 and the second wireless communication circuit 18; the second auxiliary power supply 17 is connected with the third inductor L3 and supplies power to the sampling circuit 15, the second singlechip control circuit 16 and the second wireless communication circuit 18; the second singlechip control circuit 16 controls the second wireless communication circuit 18 to transmit a feedback signal to the first wireless communication circuit 12 according to the received voltage-current signal of the sampling circuit 15.
the method for realizing constant-current and constant-voltage control based on the single-tube ICPT circuit comprises the following steps:
(1) The starting power supply supplies power to the main circuit, the first auxiliary power supply 11 is started to respectively supply power to the first singlechip control circuit 9, the drive circuit 10 and the first wireless communication circuit 12, and the second auxiliary power supply 17 is started to respectively supply power to the sampling circuit 15, the second singlechip control circuit 16 and the second wireless communication circuit 18;
(2) When the main circuit reaches a stable working state, the storage battery 8 starts to be charged, the first stage of charging is constant current charging, the sampling circuit 15 works, the second singlechip control circuit 16 carries out AD conversion on the collected signals, when the collected voltage signal UB is judged to be lower than a preset value Uref, the second singlechip control circuit 16 works in a current sampling mode after judging, and transmits data to the second wireless communication circuit 18 to enable the second wireless communication circuit to carry out wireless communication with the first wireless communication circuit 12; when the first single-chip microcomputer control circuit 9 detects a signal from the first wireless communication circuit 12, the first single-chip microcomputer control circuit 9 adjusts the output PWM frequency to fCC to make the main circuit operate in the constant current output mode, and makes the charging current to the storage battery 8 be stabilized at a preset value IB by fine-tuning the output PWM frequency around fCC;
(3) At the moment when the voltage across the battery 8 reaches the constant voltage mode output voltage value Uref, this voltage value is collected by the sampling circuit 15, processed by the second single chip control circuit 16, and transmitted to the second wireless communication circuit 18, so that it communicates wirelessly with the first wireless communication circuit 12. When the first single-chip microcomputer control circuit 9 detects a signal from the first wireless communication circuit 12, the first single-chip microcomputer control circuit 9 adjusts the output PWM frequency thereof to fCV to make the main circuit operate in the constant voltage output mode, and makes the charging voltage to the battery 8 be stabilized at a preset value by finely adjusting the output PWM frequency around fCV;
(4) in the constant voltage charging stage, when the current flowing through the storage battery 8 is detected to be reduced to be less than the preset limit Imin, after the processing of the second singlechip control circuit 16, the second wireless communication circuit 18, the first wireless communication circuit 12 and the first singlechip control circuit 9, the driving circuit 10 stops sending the PWM pulse signal, so that the charging is finished, otherwise, the constant voltage output is continued.
Claims (2)
1. A single-tube constant-current constant-voltage wireless charging device is characterized in that a main body structure comprises a power frequency rectification circuit, an L1C1 filter circuit, a first CLC resonance network, a transmitting coil, a switching tube, a receiving coil, a second LCC resonance network, a high-frequency rectification circuit, a filter capacitor, a storage battery, a primary side control circuit and a secondary side control circuit; after 220V power frequency alternating current passes through a power frequency rectification and L1C1 filter circuit, the power frequency alternating current is converted into direct current, and then the direct current is inverted into high-frequency alternating current by a switching tube; high-frequency alternating current is applied to two ends of the transmitting coil through the first CLC resonant network, current is induced at two ends of the receiving coil, and the current is changed into required direct current after passing through the second LCC resonant network, the high-frequency rectifying circuit and the filter capacitor and is supplied to the storage battery for charging; rectifying 220V power frequency alternating current by power frequency rectification; the L1C1 filter circuit is a low-pass filter consisting of a first inductor and a first capacitor and used for filtering higher harmonics; the switching tube realizes high-frequency inversion of electric energy; the first CLC resonant network compensates reactive circulating current of the transmitting coil and consists of a second capacitor, a third capacitor and a second inductor; the transmitting coil transmits electric energy to the receiving coil due to the magnetic field coupling effect; the second LCC resonant network consists of a fourth capacitor, a fifth capacitor and a third inductor and is used for compensating reactive circulation of the receiving coil; the high-frequency rectifying circuit and the filter capacitor convert the alternating current into direct current and charge the storage battery; the primary side control circuit comprises a first single chip microcomputer control circuit, a driving circuit, a first auxiliary power supply, a first wireless communication circuit, a first voltage detection circuit and an operation state detection circuit; the driving circuit is connected with the grid electrode of the switching tube, the first auxiliary power supply is connected with the power supply, the first voltage detection circuit is connected with the drain electrode of the switching tube, and the running state detection circuit is connected with the second capacitor; the first singlechip control circuit is respectively connected with the driving circuit, the first auxiliary power supply, the first wireless communication circuit, the first voltage detection circuit and the running state detection circuit; the first auxiliary power supply supplies power to the first wireless communication circuit, the driving circuit and the first single-chip microcomputer control circuit; the first singlechip control circuit outputs a driving signal of the switching tube according to the communication signal received by the first wireless communication circuit, and the driving signal enters the driving circuit to be amplified; the operation state detection circuit is used for detecting the operation state of the circuit; the first voltage detection circuit is used for detecting the voltage at two ends of the drain-source of the main switching tube and sending a signal to the first single-chip microcomputer control circuit to display the voltage and the current on the transmitting coil and judge whether zero voltage switching-on is realized or not, and when the current on the transmitting coil flows through zero, the switching tube is controlled to be conducted to ensure that the zero voltage switching-on of the switching tube is realized; the secondary side control circuit comprises a sampling circuit, a second single-chip microcomputer control circuit, a second auxiliary power supply and a second wireless communication circuit; the sampling circuit is connected with the anode of the storage battery and is used for detecting the output voltage and the output current of the storage battery; the second singlechip control circuit is respectively connected with the sampling circuit, the second auxiliary power supply and the second wireless communication circuit; the second auxiliary power supply is connected with the inductor L3 and supplies power to the sampling circuit, the second singlechip control circuit and the second wireless communication circuit; and the second singlechip control circuit controls the second wireless communication circuit to transmit a feedback signal to the first wireless communication circuit according to the received voltage and current signal of the sampling circuit.
2. a method for controlling the apparatus according to claim 1, comprising the steps of:
(1) The starting power supply supplies power to the main circuit, the first auxiliary power supply is started to respectively supply power to the first single-chip microcomputer control circuit, the driving circuit and the first wireless communication circuit, and the second auxiliary power supply is started to respectively supply power to the sampling circuit, the second single-chip microcomputer control circuit and the second wireless communication circuit;
(2) When the main circuit reaches a stable working state, the storage battery starts to be charged, the first stage of charging is constant current charging, the sampling circuit works, the second singlechip control circuit carries out AD conversion on the acquired signal, when the acquired voltage signal is judged to be lower than a preset value, the second singlechip control circuit judges and then works in a current sampling mode, and transmits data to the second wireless communication circuit to enable the second wireless communication circuit to carry out wireless communication with the first wireless communication circuit; when the first singlechip control circuit detects a signal from the first wireless communication circuit, the first singlechip control circuit adjusts the output PWM frequency of the first singlechip control circuit to enable the main circuit to work in a constant current output mode, and finely adjusts the output PWM frequency to enable the charging current for the storage battery to be stabilized at a preset value IB;
(3) When the voltage at the two ends of the storage battery reaches the voltage value output by the constant voltage mode, the voltage value is collected by the sampling circuit, is processed by the second singlechip control circuit, and transmits data to the second wireless communication circuit, so that the second wireless communication circuit is in wireless communication with the first wireless communication circuit; when the first singlechip control circuit detects a signal from the first wireless communication circuit, the first singlechip control circuit adjusts the output PWM frequency of the first singlechip control circuit to enable the main circuit to work in a constant voltage output mode, and finely adjusts the output PWM frequency to enable the charging voltage for the storage battery to be stabilized at a preset value;
(4) In the constant voltage charging stage, when the current flowing through the storage battery is detected to be reduced to be smaller than a preset minimum limit, the driving circuit stops sending the PWM pulse signal after the processing of the second singlechip control circuit, the second wireless communication circuit, the first wireless communication circuit and the first singlechip control circuit, so that the charging is finished, otherwise, the constant voltage output is continued.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332505A (en) * | 2020-10-27 | 2021-02-05 | 青岛大学 | Single-tube inversion constant-current and constant-voltage wireless charging device and method |
| CN112436615A (en) * | 2020-12-02 | 2021-03-02 | 青岛大学 | Magnetic integrated coupling parallel single-tube wireless electric energy transmission device and constant voltage control method thereof |
| CN113103886A (en) * | 2021-03-09 | 2021-07-13 | 桂林电子科技大学 | Novel automatic charging method and device for unmanned aerial vehicle |
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| CN104821643A (en) * | 2015-05-25 | 2015-08-05 | 青岛大学 | Robot wireless charging device |
| CN107147297A (en) * | 2017-05-31 | 2017-09-08 | 青岛大学 | A kind of inductively coupled power transfer control method with drop-down auxiliary switch |
| CN110391760A (en) * | 2019-07-15 | 2019-10-29 | 四川大学 | A kind of High Power Factor mixed structure multi-output switching converter |
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2019
- 2019-09-27 CN CN201910924550.5A patent/CN110544975A/en active Pending
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|---|---|---|---|---|
| CN104821643A (en) * | 2015-05-25 | 2015-08-05 | 青岛大学 | Robot wireless charging device |
| CN107147297A (en) * | 2017-05-31 | 2017-09-08 | 青岛大学 | A kind of inductively coupled power transfer control method with drop-down auxiliary switch |
| CN110391760A (en) * | 2019-07-15 | 2019-10-29 | 四川大学 | A kind of High Power Factor mixed structure multi-output switching converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112332505A (en) * | 2020-10-27 | 2021-02-05 | 青岛大学 | Single-tube inversion constant-current and constant-voltage wireless charging device and method |
| CN112436615A (en) * | 2020-12-02 | 2021-03-02 | 青岛大学 | Magnetic integrated coupling parallel single-tube wireless electric energy transmission device and constant voltage control method thereof |
| CN113103886A (en) * | 2021-03-09 | 2021-07-13 | 桂林电子科技大学 | Novel automatic charging method and device for unmanned aerial vehicle |
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