CN211670681U - Serial wireless energy transmission device - Google Patents
Serial wireless energy transmission device Download PDFInfo
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- CN211670681U CN211670681U CN201922371626.4U CN201922371626U CN211670681U CN 211670681 U CN211670681 U CN 211670681U CN 201922371626 U CN201922371626 U CN 201922371626U CN 211670681 U CN211670681 U CN 211670681U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 64
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 229910000859 α-Fe Inorganic materials 0.000 claims description 27
- 230000008878 coupling Effects 0.000 abstract description 9
- 238000010168 coupling process Methods 0.000 abstract description 9
- 238000005859 coupling reaction Methods 0.000 abstract description 9
- 238000009413 insulation Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model provides a serial wireless energy transmission device, which comprises a sending module, a relay module and a receiving module; the transmitting module, the relay module and the receiving module are sequentially arranged and respectively comprise a coil, and the transmitting module, the relay module and the receiving module realize wireless energy transmission through the coils; the transmitting module, the relay module and the receiving module are magnetically coupled through coils, so that the insulation level is improved, the condition of partial discharge is reduced, and the loads connected with the serial wireless energy transmission device are mutually independent and are not easy to cause power supply failure; energy transmission is realized in a non-contact mode of magnetic coupling between coils, the transmission efficiency is high, and the compactness of the volume and good electromagnetic compatibility are ensured; in the energy transfer process among the relay modules, the power factor of the whole device is improved through the compensation capacitor, so that the loads at all levels are independent from each other and do not influence each other, and the flexible condition of the power of the loads at all levels is ensured without influencing the overall performance of the energy transmitting device.
Description
Technical Field
The utility model relates to a power electronic technology field, concretely relates to serial wireless energy transmission device.
Background
In high-voltage power electronic converter valves for grid applications, the voltage level can be as high as hundreds or even thousands of kilovolts. In order to raise the voltage level of the power electronic device, a plurality of power semiconductor devices are required to be applied in a series connection mode. In the application of devices in series connection, each device needs to be provided with a gate driving circuit to control and protect the device, because the devices in series connection are all at different potentials, and the corresponding gate driving circuits are also at different potentials, the isolation power supply of the gate driving circuits is a problem to be solved urgently at present, and the requirement of high-voltage insulation is met in a low-cost mode while the reliable isolation power supply of the driving circuits is ensured.
In the prior art, the isolated power supply and energy transmission of a gate driving circuit are generally realized by adopting transformers with iron cores, all transformers are connected in a cascading mode, the insulation level is low, the partial discharge condition is serious, different loads are not mutually independent, and the power of a certain-stage transformer is suddenly changed to influence the overall power transmission, so that the power supply fault is easily caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of low insulation level, serious partial discharge condition and easy power supply failure in the prior art, the utility model provides a serial wireless energy transmission device, which comprises a sending module, a relay module and a receiving module; the transmitting module, the relay module and the receiving module are arranged in sequence and respectively comprise a coil, and the transmitting module, the relay module and the receiving module realize wireless energy transmission through the coils; the axial offset angle of the coils in the adjacent relay modules is 45 degrees, magnetic coupling among the sending module, the relay modules and the receiving module is achieved through the coils, the insulation level is improved, the situation of partial discharge is reduced, and the loads connected with the serial wireless energy transmission device are mutually independent and are not easy to cause power supply faults.
In order to achieve the purpose, the utility model adopts the following scheme:
the utility model provides a serial wireless energy transmission device, which comprises a sending module, a relay module and a receiving module;
the transmitting module, the relay module and the receiving module are arranged in sequence and all comprise coils;
the transmitting module, the relay module and the receiving module realize wireless energy transmission through coils;
wherein the axial offset angle of the coils in adjacent relay modules is 45 °.
The relay module further comprises two compensation capacitors, and the coil of the relay module comprises a transmitting coil and a receiving coil;
the transmitting coil and one of the compensation capacitors are connected in series to form a first energy transmission loop, and the receiving coil and the other compensation capacitor are connected in series to form a second energy transmission loop.
The relay module further comprises a ferrite;
the ferrite is disposed between the first energy transmission loop and the second energy transmission loop.
The number of the relay modules is one or more.
The transmitting module further comprises an alternating current power supply, a compensation capacitor and a ferrite, and a coil of the transmitting module comprises a transmitting coil;
the ferrite and the sending coil are arranged in parallel, and the alternating current power supply, the compensation capacitor and the sending coil are connected in series and then connected in parallel at two ends of the alternating current power supply.
The receiving module further comprises a compensation capacitor and a ferrite, and the coil of the receiving module comprises a receiving coil;
the ferrite is arranged in parallel with the receiving coil, and the receiving coil is connected with the compensation capacitor in series.
And axial offset angles between the sending coil of the sending module and the receiving coil of the first energy transmission loop and between the sending coil of the second energy transmission loop and the receiving coil of the receiving module are both 45 degrees.
The distance between the sending coil of the sending module and the receiving coil of the first energy transmission loop, the distance between the sending coil of the first energy transmission loop and the receiving coil of the second energy transmission loop and the distance between the sending coil of the second energy transmission loop and the receiving coil of the receiving module are equal, and the distance between the sending coil of the sending module and the receiving coil of the receiving module is determined based on the area of the coils.
And a hole is formed in the middle of the ferrite.
The coils are bipolar coils, and the shapes and the sizes of all the coils are equal.
Compared with the closest prior art, the utility model provides a technical scheme has following beneficial effect:
the utility model provides a serial wireless energy transmission device, which comprises a sending module, a relay module and a receiving module which transmit energy in a wireless way in turn; the transmitting module, the relay module and the receiving module are sequentially arranged and respectively comprise a coil, and the transmitting module, the relay module and the receiving module realize wireless energy transmission through the coils; the axial offset angle of the coils in the adjacent relay modules is 45 degrees, the magnetic coupling among the sending module, the relay modules and the receiving module is realized through the coils, the insulation level is improved, the condition of partial discharge is reduced, and the loads connected with the serial wireless energy transmission device are mutually independent and are not easy to cause power supply faults;
the utility model discloses a realize energy transmission through the non-contact mode of magnetic coupling between the coil between sending module, relay module and the receiving module, transmission efficiency is high, and has guaranteed the compactedness of volume and good electromagnetic compatibility;
the utility model improves the power factor of the whole device through the compensation capacitor in the energy transfer process between each relay module, realizes that the loads at all levels are independent from each other and do not influence each other, ensures the flexible condition of the load power at all levels and does not influence the overall performance of the energy sending device;
the utility model provides reliable power supply for the gate driving circuit in the power electronic equipment, and simultaneously realizes low-cost high-voltage insulation by using an air insulation mode;
the compensation capacitor of the utility model is used for compensating the inductive reactive power of the coil, thereby ensuring the integral power factor and energy transmission efficiency of the device;
the utility model discloses place the ferrite between two inside coils of well relay module, the ferrite has reduced the coupling between two coils, has reduced the coupling coefficient of non-adjacent coil between the different relay modules simultaneously.
Drawings
Fig. 1 is a circuit diagram of a serial wireless energy transmission device according to an embodiment of the present invention;
fig. 2 is a magnetic circuit diagram of the serial wireless energy transmission device according to the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The wireless power transmission technology is more mature, and the volume and efficiency indexes are better. In a magnetic induction type wireless power transmission system, the breakdown voltage of air is 3kV/mm, and when the transmission distance reaches hundreds of millimeters, the voltage isolation capability of hundreds of kilovolts can be realized. The embodiment of the utility model provides a serial wireless energy transmission device, circuit diagram and magnetic circuit diagram are shown as figure 1 and figure 2 respectively, and in the figure, V0For AC power, Coil0tFor the transmitting Coil of the transmitting module, Coil1t、Coil2t、Coil3tIs the first Coil of the relay module, i.e. the transmitting Coil of the relay module, Coil1r、Coil2r、Coil3rEqual to the second Coil of the relay module, i.e. the receiving Coil of the relay module, CoilNrA receiving coil as a receiving module, C0tCompensation capacitor for transmitting module, C1r、C1t、C2r、C2tA compensation capacitor of the relay module, CNrFor the compensation capacitance of the receiving module, L0tFor self-inductance of the coil in the transmitting module, L1r、L1t、L2r、L2tFor self-inductance of the coil in the relay module, LNrIs the self-inductance of the coil in the receiving module, Fe0Ferrites, Fe, being transmitting modules2、Fe3Ferrite as a relay module, FeNThe ferrite of the receiving module is used, and energy is transmitted to the first relay module, the second relay module, … … and the receiving module from the transmitting module to the right in sequence. Each module needs to be provided with a compensation loop for compensating the inductive reactive power of the coil,therefore, the power factor and the efficiency of the whole device are ensured to be high enough, and the loads of all stages represent a gate driving circuit.
The embodiment of the utility model provides a serial wireless energy transmission device includes sending module, relay module and receiving module;
the sending module, the relay module and the receiving module are arranged in sequence and all comprise coils.
The transmitting module, the relay module and the receiving module realize wireless energy transmission through coils;
wherein the axial offset angle of the coils in adjacent relay modules is 45 °.
The relay module also comprises two compensation capacitors, and the coil of the relay module comprises a transmitting coil and a receiving coil;
the transmitting coil and one of the compensation capacitors are connected in series to form a first energy transmission loop, and the receiving coil and the other compensation capacitor are connected in series to form a second energy transmission loop.
The relay module further comprises a ferrite;
the ferrite is disposed between the first energy transmission loop and the second energy transmission loop.
The number of the relay modules is one or more.
The sending module also comprises an alternating current power supply, a compensation capacitor and a ferrite, and a coil of the sending module comprises a sending coil;
the ferrite and the sending coil are arranged in parallel, and the alternating current power supply, the compensation capacitor and the sending coil are connected in series and then are connected in parallel at two ends of the alternating current power supply.
The receiving module also comprises a compensation capacitor and a ferrite, and a coil of the receiving module comprises a receiving coil;
the ferrite is arranged in parallel with the receiving coil, and the receiving coil is connected with the compensation capacitor in series.
The axial offset angles between the sending coil of the sending module and the receiving coil of the first energy transmission loop and between the sending coil of the second energy transmission loop and the receiving coil of the receiving module are both 45 degrees.
The distance between the sending coil of the sending module and the receiving coil of the first energy transmission loop, the distance between the sending coil of the first energy transmission loop and the receiving coil of the second energy transmission loop and the distance between the sending coil of the second energy transmission loop and the receiving coil of the receiving module are equal, and the distance between the sending coil of the sending module and the receiving coil of the receiving module is determined based on the area of the coils.
The middle of the ferrite is provided with a hole.
The coils are bipolar coils and all coils are equal in shape and size.
As shown in fig. 2, axial offset angles between the transmitting coil of the transmitting module and the receiving coil of the first energy transmission loop, between the receiving coil of the first energy transmission loop and the transmitting coil of the second energy transmission loop, and between the transmitting coil of the second energy transmission loop and the receiving coil of the receiving module are all 45 °, that is, two coils separated by one coil are perpendicular to each other, two coils perpendicular to each other are decoupled from each other, and a coupling coefficient between the two coils is 0, so that the coupling coefficient can be ignored. In addition to that, Coil1rAnd Coil2tOr the coupling coefficient between the coils that are further away, can be neglected because the distance between them is sufficiently long and the ferrite acts as a shield against the magnetic field. Therefore, only the magnetic field between two adjacent coils needs to be considered.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and those skilled in the art can still modify or substitute the specific embodiments of the present invention with reference to the above embodiments, and any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are all within the scope of the claims of the present invention pending.
Claims (10)
1. A serial wireless energy transmission device is characterized by comprising a sending module, a relay module and a receiving module;
the transmitting module, the relay module and the receiving module are arranged in sequence and all comprise coils;
the transmitting module, the relay module and the receiving module realize wireless energy transmission through coils;
wherein the axial offset angle of the coils in adjacent relay modules is 45 °.
2. The serial wireless energy transfer device of claim 1, wherein the relay module further comprises two compensation capacitors, the coils of the relay module comprising a transmit coil and a receive coil;
the transmitting coil and one of the compensation capacitors are connected in series to form a first energy transmission loop, and the receiving coil and the other compensation capacitor are connected in series to form a second energy transmission loop.
3. The serial wireless energy transfer apparatus of claim 2 wherein the relay module further comprises a ferrite;
the ferrite is disposed between the first energy transmission loop and the second energy transmission loop.
4. The serial wireless energy transfer device of claim 3, wherein the relay module is one or more.
5. The serial wireless energy transfer device of claim 3, wherein the transmitting module further comprises an alternating current power source, a compensation capacitor and a ferrite, the coil of the transmitting module comprising a transmitting coil;
the ferrite and the sending coil are arranged in parallel, and the alternating current power supply, the compensation capacitor and the sending coil are connected in series and then connected in parallel at two ends of the alternating current power supply.
6. The serial wireless energy transfer device of claim 5, wherein the receiving module further comprises a compensation capacitor and a ferrite, the coil of the receiving module comprising a receiving coil;
the ferrite is arranged in parallel with the receiving coil, and the receiving coil is connected with the compensation capacitor in series.
7. The serial wireless energy transfer device of claim 6, wherein the axial offset angles between the transmitting coil of the transmitting module and the receiving coil of the first energy transfer loop and between the transmitting coil of the second energy transfer loop and the receiving coil of the receiving module are both 45 °.
8. The serial wireless energy transmission device according to claim 6, wherein the distance between the transmitting coil of the transmitting module and the receiving coil of the first energy transmission loop, the distance between the transmitting coil of the first energy transmission loop and the receiving coil of the second energy transmission loop, and the distance between the transmitting coil of the second energy transmission loop and the receiving coil of the receiving module are all equal, and the three distances are determined based on the area of the coils.
9. The serial wireless energy transfer device of claim 6, wherein the ferrite has a hole in the middle.
10. The serial wireless energy transfer device of claim 1, wherein the coils are bipolar coils and all coils are equal in shape and size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922371626.4U CN211670681U (en) | 2019-12-25 | 2019-12-25 | Serial wireless energy transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922371626.4U CN211670681U (en) | 2019-12-25 | 2019-12-25 | Serial wireless energy transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211670681U true CN211670681U (en) | 2020-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922371626.4U Active CN211670681U (en) | 2019-12-25 | 2019-12-25 | Serial wireless energy transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211670681U (en) |
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2019
- 2019-12-25 CN CN201922371626.4U patent/CN211670681U/en active Active
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