CN210082963U - AGV's constant voltage developments wireless power transmission system - Google Patents
AGV's constant voltage developments wireless power transmission system Download PDFInfo
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- CN210082963U CN210082963U CN201920535960.6U CN201920535960U CN210082963U CN 210082963 U CN210082963 U CN 210082963U CN 201920535960 U CN201920535960 U CN 201920535960U CN 210082963 U CN210082963 U CN 210082963U
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- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- 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
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Abstract
The utility model discloses a constant voltage dynamic wireless power transmission system of AGV, which comprises a primary voltage source, a plurality of sections of primary transmitting parts, a receiving coil internal resistance, a secondary inductance capacitance branch and a load; the primary side voltage source is formed by connecting a total direct current voltage source and a plurality of high-frequency inverter circuits in parallel, and the output of each high-frequency inverter circuit is used as the input of each primary side transmitting part; each primary side transmitting part forms an LCC type reactive power compensation network; the secondary inductance-capacitance branch circuit comprises a third capacitor and a second inductor, the receiving coil is sequentially connected with the second inductor, the load and the internal resistance of the receiving coil in series, one end of the third capacitor is connected to one side of the receiving coil connected with the second inductor, and the other end of the third capacitor is connected to one side of the internal resistance of the receiving coil connected with the load, so that a secondary LCL type reactive power compensation network is formed. The utility model discloses can realize the wireless charging of constant voltage developments to the AGV homoenergetic of difference, have actual spreading value.
Description
Technical Field
The utility model belongs to the technical field of wireless power transmission or wireless power transmission's technique and specifically relates to indicate a constant voltage developments wireless power transmission system of AGV.
Background
With the development of modern technologies, Automated Guided Vehicles (AGVs) play an increasingly important role in automated and intelligent industrial production activities due to their advantages of high automation degree, strong adaptability, simple path arrangement, and the like. At present, the AGV mainly adopts a storage battery for power supply, and although the storage battery has good safety, the AGV has the defects of large battery consumption, short endurance mileage, long charging time and the like. Obviously, for AGVs, cable powered or static wireless power technologies have not been able to meet their fully automated operating characteristics. On the basis, a Dynamic Wireless Power Transfer (DWPT) technology is gradually developed and rapidly becomes a research hotspot for Wireless Power supply of mobile equipment such as AGVs. The dynamic wireless power transmission technology assumes that a corresponding wireless power supply device is laid on a moving track of the AGV, the moving AGV is charged uninterruptedly, infinite extension of the continuous moving mileage of the AGV can be achieved theoretically, the problem of endurance limited by a battery technology is thoroughly solved, and full-automatic work in the true sense is achieved. However, the dynamic wireless power transmission technology is greatly affected by the coupling coefficient change caused by load movement and the switching of different loads, and a stable dynamic wireless power transmission system needs to have strong robustness to these factors.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a overcoming prior art's shortcoming and not enough, providing a AGV's constant voltage developments wireless power transmission system, realizing the wireless charging of constant voltage developments to the AGV homoenergetic of difference, having actual spreading value.
In order to achieve the above object, the present invention provides a technical solution: a constant-voltage dynamic wireless power transmission system of an AGV comprises a primary voltage source, a segmented primary transmitting part, a receiving coil internal resistance, a secondary inductance-capacitance branch and a load; the primary side voltage source is formed by connecting a total direct current voltage source and a plurality of high-frequency inverter circuits in parallel, and the output of each high-frequency inverter circuit is used as the input of each primary side transmitting part; each primary side transmitting part consists of a first inductor, a first capacitor, a transmitting coil, an internal resistance of the transmitting coil and a second capacitor, one end of the first inductor is connected with one output end of the high-frequency inverter circuit, the other end of the first inductor is connected with the second capacitor, and the other end of the second capacitor is connected with the other output end of the high-frequency inverter circuit; the first capacitor, the transmitting coil and the internal resistance of the transmitting coil are sequentially connected in series and then connected in parallel at two ends of the second capacitor, so that an LCC type reactive compensation network of a primary side transmitting part is formed, and the current of the transmitting coil is constant; the secondary inductance-capacitance branch circuit comprises a third capacitor and a second inductor, the receiving coil is sequentially connected with the second inductor, the load and the internal resistance of the receiving coil in series, one end of the third capacitor is connected to one side of the receiving coil connected with the second inductor, and the other end of the third capacitor is connected to one side of the internal resistance of the receiving coil connected with the load, so that a secondary LCL type reactive power compensation network is formed, and the characteristic that the output voltage is irrelevant to the load is realized.
Further, a current I flowing through the transmitting coilsSatisfies the following conditions:
wherein, UDIs the output voltage of the high-frequency inverter circuit, CsrIs the capacitance value of the second capacitor, LsrIs the inductance value of the first inductor.
Further, the output voltage of the system is independent of the load, and the output voltage U is independent of the loadoThe expression is as follows:
wherein, ω is0Is the angular frequency of system operation, M is the mutual inductance of primary and secondary side coils, IsIs the transmitting coil current, i.e. the primary coil current, LfIs a second inductance value, LrThe inductance value of the receiving coil.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
1. the characteristic that secondary side output voltage is irrelevant to load is realized by adopting the principle of an LCL type reactive compensation network, and the problem of output voltage fluctuation when different types of load AGV switch charging is solved.
2. The LCC type reactive compensation network and the LCL type reactive compensation network are adopted to simultaneously realize the functions of constant current and constant voltage output of the primary coil, so that the constant output voltage can be used for supplying power for different load AGV, the robustness and the practicability of the dynamic wireless power transmission system are increased, the freedom degree of parameter design is increased, and the dynamic wireless power transmission system is completely different from the traditional reactive compensation topological dynamic wireless power transmission system.
Drawings
Fig. 1 is a schematic circuit diagram provided in an embodiment.
Fig. 2 is an equivalent circuit diagram in the embodiment.
Fig. 3 is a graph showing the output voltage and the voltage gain corresponding to the load variation in the embodiment.
Detailed Description
To further illustrate the aspects and features of the present invention, the following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the embodiments and protection of the present invention are not limited thereto, and it should be understood that the embodiments described herein are only used for explaining the present invention and are not intended to limit the present invention, i.e., the described embodiments are only some embodiments of the present invention, but not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
As shown in fig. 1, the constant voltage dynamic wireless power transmission system of AGV provided in this embodiment includes a primary voltage source, a segmented primary transmitting part, and a receiving coil LrInternal resistance R of the receiving coil2Secondary side inductance capacitance branch and load RL(ii) a The primary side voltage source is composed of a total DC voltage source UdAnd a plurality of high-frequency inverter circuits 1 connected in parallel, the output of each high-frequency inverter circuit 1 being used as each segmentThe input of the primary side transmitting part; each primary side transmitting part is provided with a first inductor LsrA first capacitor CsTransmitting coil LsInternal resistance R of the transmitting coil1And a second capacitor CsrIs formed by the first inductor LsrOne end of the first capacitor is connected with one output end of the high-frequency inverter circuit 1, and the other end of the first capacitor is connected with the second capacitor CsrConnected, the second capacitor CsrThe other end of the high-frequency inverter circuit 1 is connected with the other output end of the high-frequency inverter circuit; the first capacitor CsAnd a transmitting coil LsInternal resistance R of the transmitting coil1Are sequentially connected in series and then are connected in parallel with a second capacitor CsrSo as to form an LCC type reactive compensation network of the primary side transmitting part; the secondary side inductance-capacitance branch circuit comprises a third capacitor CrAnd a second inductance LfThe receiving coil LrAnd a second inductor LfLoad RLInternal resistance R of the receiving coil2Are connected in series in turn, the third capacitor CrIs connected to the second inductor LfConnected receiving coil LrOne side and the other end is connected with a load RLInternal resistance R of connected receiving coil2So as to form a secondary LCL type reactive compensation network.
The utility model discloses the theory of operation of system does: DC voltage source UdHigh-frequency alternating-current square waves are output after passing through a high-frequency inverter circuit 1, and a transmitting coil L is realized through an LCC type reactive compensation network of a primary side transmitting partsThe current is constant, and the receiving coil L is constant in the moving process of the AGVrBy means of a transmitting coil LsMutual inductance coupling between the two circuits picks up energy, and the characteristic that the output voltage is irrelevant to the load is realized through a secondary LCL type reactive compensation network.
In addition, in order to analyze the characteristics of the constant voltage dynamic wireless power transmission system of the AGV according to this embodiment, it is specified that only one section of the transmitting coil is in the transmitting energy state at the same time, and then an equivalent circuit of this system is obtained as shown in fig. 2.
To ensure the system is in a resonance working state, the compensation network parameters need to be satisfied
Suppose the system power angular frequency is ω0Due to j ω0Lr＞＞R2And therefore the secondary winding internal resistance is negligible. Thus writing the KVL equation to the secondary side circuit column shown in fig. 2 yields:
the following steps are provided:
U21＝jω0MIs
the available output voltage is:
therefore, the secondary output voltage is independent of the load and only related to the primary coil current and the secondary coil mutual inductance.
And the LCC type reactive compensation network of the primary side transmitting part meets the following requirements:
the current flowing through the primary winding is:
writing the KVL equation to the primary circuit column yields:
Uin＝IsR1-jω0MIr
therefore, can obtain the utility model discloses the voltage gain of embodiment circuit does:
the output voltage and the voltage gain curve that correspond when the load changes are shown in fig. 3, can know from the picture, the utility model discloses a AGV's constant voltage developments wireless power transmission system can realize the characteristic that primary side current and vice limit output voltage all are irrelevant with the load, and there is very big difference with the developments wireless power transmission system of traditional reactive compensation mode, the utility model discloses the advantage of system is obvious, is worth promoting.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (3)
1. The utility model provides a constant voltage developments wireless power transmission system of AGV which characterized in that: the system comprises a primary side voltage source, a segmented primary side transmitting part and a receiving coil (L)r) Internal resistance (R) of the receiving coil2) Secondary side inductance capacitance branch and load (R)L) (ii) a The primary side voltage source is composed of a total DC voltage source (U)d) The high-frequency inverter circuit is formed by connecting a plurality of high-frequency inverter circuits (1) in parallel, and the output of each high-frequency inverter circuit (1) is used as the input of each primary side transmitting part; each primary side transmitting part is provided with a first inductor (L)sr) A first capacitor (C)s) Transmitting coil (L)s) Internal resistance of the transmitting coil (R)1) And a second capacitance (C)sr) Is formed by the first inductance (L)sr) One end of the first capacitor is connected with one output end of the high-frequency inverter circuit (1), and the other end of the first capacitor is connected with the second capacitor (C)sr) Connected, the second capacitance (C)sr) The other end of the high-frequency inverter circuit (1) is connected with the other output end of the high-frequency inverter circuit; the first capacitor (C)s) And a transmitting coil (L)s) Internal resistance of the transmitting coil (R)1) Are sequentially connected in series and then connected in parallel with a second capacitor (C)sr) Thereby forming an LCC type reactive compensation network of the primary side transmitting part, realizing the transmitting coil (L)s) The current is constant; the secondary side inductance-capacitance branch comprises a third capacitor (C)r) And a second inductance (L)f) The receiving coil (L)r) And a second inductance (L)f) Load (R)L) Internal resistance (R) of the receiving coil2) In turn connected in series, the third capacitor (C)r) Is connected to the second inductor (L)f) Connected receiving coil (L)r) One side and the other side is connected with a load (R)L) Internal resistance (R) of connected receiving coil2) So as to form a secondary LCL type reactive compensation network to realize output voltage and load (R)L) An irrelevant characteristic.
2. The constant voltage dynamic wireless power transmission system of an AGV of claim 1, wherein: flow through the transmitter coil (L)s) Current of (I)sSatisfies the following conditions:
wherein, UDIs the output voltage of the high-frequency inverter circuit, CsrIs the capacitance value of the second capacitor, LsrIs the inductance value of the first inductor.
3. The constant voltage dynamic wireless power transmission system of an AGV of claim 1, wherein: output voltage and load (R) of the systemL) Independently of its output voltage UoThe expression is as follows:
wherein, ω is0Is the system working angular frequency, M is the mutual inductance of the primary and secondary side coils; i issIs the transmitting coil current, i.e. the primary coil current, LfIs a second inductance value, LrThe inductance value of the receiving coil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920535960.6U CN210082963U (en) | 2019-04-19 | 2019-04-19 | AGV's constant voltage developments wireless power transmission system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920535960.6U CN210082963U (en) | 2019-04-19 | 2019-04-19 | AGV's constant voltage developments wireless power transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001426A (en) * | 2019-04-19 | 2019-07-12 | 华南理工大学 | A kind of constant pressure dynamic radio electric energy Transmission system of AGV |
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2019
- 2019-04-19 CN CN201920535960.6U patent/CN210082963U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001426A (en) * | 2019-04-19 | 2019-07-12 | 华南理工大学 | A kind of constant pressure dynamic radio electric energy Transmission system of AGV |
| CN110001426B (en) * | 2019-04-19 | 2024-05-07 | 华南理工大学 | Constant-voltage dynamic wireless power transmission system of AGV |
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