CN109808521B - Electric automobile wireless charging information communication frequency conversion drive circuit - Google Patents
Electric automobile wireless charging information communication frequency conversion drive circuit Download PDFInfo
- Publication number
- CN109808521B CN109808521B CN201910111561.1A CN201910111561A CN109808521B CN 109808521 B CN109808521 B CN 109808521B CN 201910111561 A CN201910111561 A CN 201910111561A CN 109808521 B CN109808521 B CN 109808521B
- Authority
- CN
- China
- Prior art keywords
- resonant capacitor
- full
- inverter circuit
- switch
- bridge inverter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model provides an information communication frequency conversion drive circuit that charges that electric automobile is wireless, relates to a wireless charging technology, in order to satisfy the demand that electric automobile is quick, accurate, the wireless charging of low-cost and accurate positioning. The two ends of the direct current side of the full-bridge inverter circuit are connected with a direct current power supply DC, the alternating current side of the full-bridge inverter circuit is connected with a magnetic coupling coil L1, the other end of the magnetic coupling coil L1 is connected with a resonant capacitor C1, and a resonant capacitor C1 is connected with the output end of the alternating current side of the full-bridge inverter circuit; the switch K is connected with the resonant capacitor C2, the switch K is connected with the direct-current power supply DC, and the resonant capacitor C2 is connected with a common node of the resonant capacitor C1 and the alternating-current side output end of the full-bridge inverter circuit; the source of the switching tube Q5 is connected to the common node between the switch K and the resonant capacitor C2, and the drain of the switching tube Q5 is connected to the common node between the other end of the magnetic coupling coil L1 and one end of the resonant capacitor C1. The beneficial effects are that the cost is lower, and convenient, safe and reliable operation.
Description
Technical Field
The invention relates to a wireless charging technology.
Background
The existing wireless power transmission technology of the electric automobile mainly adopts a high-frequency coupling magnetic field as a carrier for transmitting energy, and energy is transmitted through the coupling magnetic field; in practical application, however, wireless communication between the ground charging device and the vehicle needs to be established, so that the corresponding relationship between the ground device and the vehicle is determined on one hand; on the other hand, the coordination control of the ground device and the vehicle body part is realized; although the high-frequency wireless communication has the advantages of high reliability and high transmission speed, the position information of the ground device and the vehicle body can not be determined generally, and the corresponding relation of the positions can not be realized; if the position information needs to be determined, the method can be generally realized through means such as laser radar, video identification, manual input and the like, but the laser radar has higher cost and larger influence on surrounding interference objects; the visual identification is influenced by light and lens cleaning degree, and the reliability is low; the manual input work is complicated, and the error probability is high; the methods can not meet the requirements of quick, accurate, low-cost and accurate positioning of the wireless charging of the electric automobile; although the above problems can be solved well by the original magnetic coupling system of the wireless charging device by means of the near field communication of the magnetic field; however, the operating frequency of the nfc is high, and the nfc is not matched with high-power wireless communication power, so that a new circuit needs to be added, which results in high cost.
Disclosure of Invention
The invention aims to meet the requirements of quick, accurate, low-cost wireless charging and accurate positioning of an electric automobile, and provides a wireless charging information communication variable-frequency driving circuit of the electric automobile.
The invention relates to a wireless charging information communication frequency conversion driving circuit of an electric automobile, which comprises a full-bridge inverter circuit, a resonant capacitor C1, a resonant capacitor C2, a switching tube Q5, a magnetic coupling coil L1 and a switch K;
the two ends of the direct current side of the full-bridge inverter circuit are respectively connected with the positive electrode and the negative electrode of a direct current power supply DC, one output end of the alternating current side of the full-bridge inverter circuit is connected with one end of a magnetic coupling coil L1, the other end of the magnetic coupling coil L1 is connected with one end of a resonant capacitor C1, and the other end of the resonant capacitor C1 is connected with the other output end of the alternating current side of the full-bridge inverter circuit;
one end of the switch K is connected with one end of the resonant capacitor C2, the other end of the switch K is connected with the negative electrode of the direct-current power supply DC, and the other end of the resonant capacitor C2 is connected with a common node of the other end of the resonant capacitor C1 and the other output end of the alternating-current side of the full-bridge inverter circuit;
the source of the switch tube Q5 is connected to the common node between the switch K and the resonant capacitor C2, and the drain of the switch tube Q5 is connected to the common node between the other end of the magnetic coupling coil L1 and one end of the resonant capacitor C1.
Preferably, the full-bridge inverter circuit comprises a switching tube Q1, a switching tube Q2, a switching tube Q3 and a switching tube Q4;
the drain electrode of the switch tube Q1 is connected with the drain electrode of the switch tube Q2, the common end of the switch tube Q1 is one end of the direct current side of the full-bridge inverter circuit, and the common end of the switch tube Q1 is connected with the positive electrode of the direct current power supply DC;
the source electrode of the switch tube Q3 is connected with the source electrode of the switch tube Q4, the common end of the switch tube Q3 is the other end of the direct current side of the full-bridge inverter circuit, and the common end of the switch tube Q3 is connected with the negative electrode of the direct current power supply DC;
the source electrode of the switch tube Q1 is connected with the drain electrode of the switch tube Q3, the common end of the switch tube Q1 is an output end of the AC side of the full-bridge inverter circuit, and is connected with one end of the magnetic coupling coil L1;
the source electrode of the switch tube Q2 is connected with the drain electrode of the switch tube Q4, the common end of the switch tube Q2 is the other output end of the alternating current side of the full-bridge inverter circuit, and the common end of the switch tube Q4 is connected with the other end of the resonant capacitor C1.
The frequency conversion driving circuit adopts the on and off of the switch K as two working modes of the frequency conversion driving circuit, when the switch K is in an off state, the frequency conversion driving circuit is in a wireless charging mode, and at the moment, the resonant capacitor C2 and the switch tube Q5 do not participate in the working of the whole circuit; when the switch K is in a closed state, the variable frequency driving circuit is in a wireless communication mode, at this time, the switching tube Q1 is turned on, the switching tube Q2, the switching tube Q3 and the switching tube Q4 are turned off, at this time, the resonant capacitor C1 and the resonant capacitor C2 are connected in parallel, and the variable frequency principle on parameters is as follows:
total capacitance value of C3：
Wherein, C1Is the capacitance value of the resonant capacitor C1, C2The capacitance value of the resonance capacitor C2;
due to the series connection of C2, the total capacitance value C is obtained3＜C1；
Resonant frequency omega before switch K is closed1The formula of (a):
resonant frequency omega after switch K is closed2Comprises the following steps:
and due to C3＜C1Thus ω2＞ω1The frequency conversion of the resonant circuit is realized;
the specific circuit working process of the variable frequency driving circuit is as follows:
when the switch K is closed, the driving signal enables the switching tube Q1 to be switched on for a long time, and the switching tube Q2, the switching tube Q3 and the switching tube Q4 are switched off; the grid electrode of the switching tube Q5 is driven by the existing switching tube driving circuit, and the switching tube Q5 is controlled to work, so that the original current frequency in the magnetic coupling coil L1 is changed; and further adopting other control algorithms and coding modes to realize that a specific magnetic field is generated in the magnetic coupling coil L1, the magnetic field is coupled with a receiving coil on the vehicle to generate magnetic field signal coupling so as to realize frequency conversion near field transmission of information.
The wireless charging circuit has the advantages that the main structure of the original wireless charging circuit is utilized, the resonant capacitor C2, the switch K and the switch tube Q5 are additionally arranged, frequency conversion and information communication are achieved, and the wireless charging circuit has the advantages of low cost, convenience in working, safety and reliability; because the direct-current power supply voltage is high, the time for driving the switching tube Q5 to be conducted by the existing switching tube driving circuit can generate a magnetic field signal with high frequency, and simultaneously can reduce the voltage on the series capacitor C1 and reduce the voltage stress.
Drawings
Fig. 1 is a circuit diagram of a wireless charging information communication variable frequency driving circuit of an electric vehicle according to the present invention.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the wireless charging information communication variable frequency driving circuit of the electric vehicle according to the embodiment includes a full bridge inverter circuit, a resonant capacitor C1, a resonant capacitor C2, a switching tube Q5, a magnetic coupling coil L1 and a switch K;
the two ends of the direct current side of the full-bridge inverter circuit are respectively connected with the positive electrode and the negative electrode of a direct current power supply DC, one output end of the alternating current side of the full-bridge inverter circuit is connected with one end of a magnetic coupling coil L1, the other end of the magnetic coupling coil L1 is connected with one end of a resonant capacitor C1, and the other end of the resonant capacitor C1 is connected with the other output end of the alternating current side of the full-bridge inverter circuit;
one end of the switch K is connected with one end of the resonant capacitor C2, the other end of the switch K is connected with the negative electrode of the direct-current power supply DC, and the other end of the resonant capacitor C2 is connected with a common node of the other end of the resonant capacitor C1 and the other output end of the alternating-current side of the full-bridge inverter circuit;
the source of the switch tube Q5 is connected to the common node between the switch K and the resonant capacitor C2, and the drain of the switch tube Q5 is connected to the common node between the other end of the magnetic coupling coil L1 and one end of the resonant capacitor C1.
The second embodiment is as follows: in this embodiment, the full-bridge inverter circuit includes a switching transistor Q1, a switching transistor Q2, a switching transistor Q3, and a switching transistor Q4;
the drain electrode of the switch tube Q1 is connected with the drain electrode of the switch tube Q2, the common end of the switch tube Q1 is one end of the direct current side of the full-bridge inverter circuit, and the common end of the switch tube Q1 is connected with the positive electrode of the direct current power supply DC;
the source electrode of the switch tube Q3 is connected with the source electrode of the switch tube Q4, the common end of the switch tube Q3 is the other end of the direct current side of the full-bridge inverter circuit, and the common end of the switch tube Q3 is connected with the negative electrode of the direct current power supply DC;
the source electrode of the switch tube Q1 is connected with the drain electrode of the switch tube Q3, the common end of the switch tube Q1 is an output end of the AC side of the full-bridge inverter circuit, and is connected with one end of the magnetic coupling coil L1;
the source electrode of the switch tube Q2 is connected with the drain electrode of the switch tube Q4, the common end of the switch tube Q2 is the other output end of the alternating current side of the full-bridge inverter circuit, and the common end of the switch tube Q4 is connected with the other end of the resonant capacitor C1.
In the present embodiment, the other end of the switch K and the other end of the resonant capacitor C2 are connected in parallel to both sides of the switching tube Q4 of the full-bridge inverter circuit.
Claims (2)
1. The wireless charging information communication frequency conversion driving circuit of the electric automobile is characterized by comprising a full-bridge inverter circuit, a resonant capacitor C1, a resonant capacitor C2, a switching tube Q5, a magnetic coupling coil L1 and a switch K;
the two ends of the direct current side of the full-bridge inverter circuit are respectively connected with the positive electrode and the negative electrode of a direct current power supply DC, one output end of the alternating current side of the full-bridge inverter circuit is connected with one end of a magnetic coupling coil L1, the other end of the magnetic coupling coil L1 is connected with one end of a resonant capacitor C1, and the other end of the resonant capacitor C1 is connected with the other output end of the alternating current side of the full-bridge inverter circuit;
one end of the switch K is connected with one end of the resonant capacitor C2, the other end of the switch K is connected with the negative electrode of the direct-current power supply DC, and the other end of the resonant capacitor C2 is connected with a common node of the other end of the resonant capacitor C1 and the other output end of the alternating-current side of the full-bridge inverter circuit;
the source of the switch tube Q5 is connected to the common node between the switch K and the resonant capacitor C2, and the drain of the switch tube Q5 is connected to the common node between the other end of the magnetic coupling coil L1 and one end of the resonant capacitor C1.
2. The wireless charging information communication variable frequency driving circuit of the electric automobile according to claim 1, wherein the full bridge inverter circuit comprises a switching tube Q1, a switching tube Q2, a switching tube Q3 and a switching tube Q4;
the drain electrode of the switch tube Q1 is connected with the drain electrode of the switch tube Q2, the common end of the switch tube Q1 is one end of the direct current side of the full-bridge inverter circuit, and the common end of the switch tube Q1 is connected with the positive electrode of the direct current power supply DC;
the source electrode of the switch tube Q3 is connected with the source electrode of the switch tube Q4, the common end of the switch tube Q3 is the other end of the direct current side of the full-bridge inverter circuit, and the common end of the switch tube Q3 is connected with the negative electrode of the direct current power supply DC;
the source electrode of the switching tube Q1 is connected with the drain electrode of the switching tube Q3, the common end of the switching tube Q1 is an output end of the alternating current side of the full-bridge inverter circuit, and is connected with one end of the magnetic coupling coil L1;
the source electrode of the switch tube Q2 is connected with the drain electrode of the switch tube Q4, the common end of the switch tube Q2 is the other output end of the alternating current side of the full-bridge inverter circuit, and the common end of the switch tube Q4 is connected with the other end of the resonant capacitor C1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910111561.1A CN109808521B (en) | 2019-02-12 | 2019-02-12 | Electric automobile wireless charging information communication frequency conversion drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910111561.1A CN109808521B (en) | 2019-02-12 | 2019-02-12 | Electric automobile wireless charging information communication frequency conversion drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109808521A CN109808521A (en) | 2019-05-28 |
| CN109808521B true CN109808521B (en) | 2022-07-05 |
Family
ID=66606457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910111561.1A Active CN109808521B (en) | 2019-02-12 | 2019-02-12 | Electric automobile wireless charging information communication frequency conversion drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109808521B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006006142A1 (en) * | 2004-07-08 | 2006-01-19 | Lv Power (2003) Ltd. | Bi-directional energy conversion system |
| CN103490527A (en) * | 2013-10-15 | 2014-01-01 | 重庆大学 | Load identifying method and system of voltage type wireless power supply system |
| CN104539185B (en) * | 2015-01-13 | 2017-08-29 | 华南理工大学 | The high frequency power source of resonance manifold type wireless electric energy transmission device |
| KR20170042944A (en) * | 2015-10-12 | 2017-04-20 | 현대자동차주식회사 | Method and apparatus for wireless charging using variable switching frequency |
| CN107069988B (en) * | 2017-06-19 | 2019-10-22 | 哈尔滨工业大学 | A kind of wireless energy and data synchronous transmission system and its parameter acquiring method |
-
2019
- 2019-02-12 CN CN201910111561.1A patent/CN109808521B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109808521A (en) | 2019-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106602733B (en) | Magnetic coupling resonance electric energy transmitting end, receiving end and system with multiple parallel resonance circuits | |
| CN105429313A (en) | Wireless electric energy transmission system with switchable resonance compensation topology and control method thereof | |
| CN109823206B (en) | Soft switch high-efficiency wireless charging method based on bilateral phase shift and frequency modulation | |
| WO2021082407A1 (en) | Wireless charging receiving end, system and control method | |
| CN104734300A (en) | Electric vehicle wireless charging circuit and control method thereof | |
| CN102751793B (en) | Wireless power transfer system based on bilateral power flow control and control method thereof | |
| CN111654116B (en) | High-gain constant-voltage constant-current output electric field coupling wireless power transmission system | |
| WO2021083287A1 (en) | Wireless charging receiver, system and control method | |
| US10148127B2 (en) | Wireless power transmitting apparatus and method thereof | |
| CN110635545A (en) | Device and method for realizing constant-current constant-voltage wireless charging based on single-tube circuit | |
| CN104617646A (en) | Intelligent wireless charging device based on ZVS self-exciting resonance | |
| CN112072765A (en) | Hybrid charging system based on minimum apparent power module and design method | |
| CN105305659A (en) | Magnetic coupling resonant wireless power transmission device | |
| CN110611359A (en) | Device and method for realizing single-tube inversion constant-current constant-voltage wireless charging through secondary compensation network switching | |
| US20170040844A1 (en) | Efficient power transmitting terminal, contactless power transmission device and power transmission method | |
| CN112421792B (en) | Wireless charging system and control method for constant-current/constant-voltage charging optimization | |
| CN109808521B (en) | Electric automobile wireless charging information communication frequency conversion drive circuit | |
| CN112311107A (en) | Single-tube inversion inductive coupling electric energy transmission device and control method thereof | |
| CN210404849U (en) | Half-bridge resonance inversion type magnetic coupling resonance wireless charging power supply | |
| CN112260549A (en) | Method for reducing loss of primary side inverter of resonant wireless power transmission system | |
| CN109969008B (en) | Mutual inductance estimation method and system based on AC/DC converter multi-source wireless charging | |
| CN108258814B (en) | Wireless power transmission system | |
| CN104578454A (en) | Novel single-phase load wireless electric energy transmission system and design method thereof | |
| CN210806860U (en) | Wireless power transmission system with constant voltage output characteristic | |
| CN108347104B (en) | Internal-feed type wireless power transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |