TWI382628B - Energy transferring system - Google Patents

Description

Energy transmission system

This invention relates to an energy delivery system, and more particularly to an energy delivery system for a resonator employing a flat-wire Solenoid structure.

Traditionally, a variety of wireless transmission technologies have been widely used in the field of communications. Most of the current wireless transmission technologies are used for receiving and transmitting signals, so most of them can only achieve low-power signal transmission.

Due to the increasing number of electronic products using wireless transmission technology, development systems that achieve higher power transmission technologies by wireless transmission are receiving more and more attention. U.S. Patent Publication No. 2007/0222542 discloses a wireless non-radiative energy transfer device capable of wirelessly transmitting wireless power transfer (WPT) for energy transmission to resonate the electrical energy of a resonator. To another resonator.

However, such a transfer device transmits energy via a non-radiative energy transfer. Therefore, it is necessary to use a resonator having a lower resonance frequency to achieve a certain transmission efficiency. However, such resonators are bulky and costly, and are difficult to apply to general electronic products. Therefore, how to design an energy transfer system that is small in size and still has a low resonance frequency is one of the industries that the industry is constantly striving for.

The invention relates to an energy transmission system which uses a flat-type spiral tube structure resonator. Compared with a conventional energy transmission system, the energy transmission system proposed by the invention has a small volume and a resonance. The advantages of lower frequency and higher energy conversion efficiency.

According to the present invention, an energy transmission system for driving an electronic device is provided. The energy transmission system includes a power supply end device, first and second energy transmission devices, and device end devices. The power supply device is configured to provide first external electrical energy. The first energy transfer device includes a first coupling circuit and a first resonator. The first coupling circuit forms a loop with the power supply end device to receive the first external electrical energy. A first external electrical energy on the first coupling circuit is coupled to the first resonator such that the first resonator has a first internal electrical energy. The second energy transfer device includes a second resonator and a second coupling circuit. The second resonator has a flat-wire Solenoid structure, the second resonator has substantially the same resonant frequency as the first resonator, and non-radiative energy transfer between the first and second resonators (Non -radiative Energy Transfer), the second resonator has a second internal electrical energy. A second internal electrical energy on the second resonator is coupled to the second coupling circuit such that the second coupling circuit has a second external electrical energy. The device end device forms a loop with the second coupling circuit to receive the second external electrical energy and thereby provide driving power to drive the electronic device.

According to the present invention, an energy transmission system for driving an electronic device is provided. The energy transmission system includes a power supply end device, first and second energy transmission devices, and device end devices. The power supply device is configured to provide first external electrical energy. The first energy transfer device includes a first coupling circuit and a first resonator. The first coupling circuit forms a loop with the power supply end device to receive the first external electrical energy. The first resonator has a flat spiral tube structure, and the first external electrical energy on the first coupling circuit is coupled to the first resonator such that the first resonator has the first internal electrical energy. The second energy transfer device includes a second resonator and a second coupling circuit. The second resonator has substantially the same resonant frequency as the first resonator, and the non-radiative energy transfer between the first and second resonators causes the second resonator to have the second internal electrical energy. A second internal electrical energy on the second resonator is coupled to the second coupling circuit such that the second coupling circuit has a second external electrical energy. The device end device forms a loop with the second coupling circuit to receive the second external electrical energy and thereby provide driving power to drive the electronic device.

In order to make the above-mentioned contents of the present invention more comprehensible, a preferred embodiment will be described below, and in conjunction with the drawings, a detailed description is as follows:

The energy transfer system of this embodiment is a resonator of a flat-wire Solenoid structure.

Please refer to FIG. 1 , which is a block diagram of an energy transfer system in accordance with an embodiment of the present invention. The energy transfer system 10 is used to drive the electronic device 20. The electronic device 20 is preferably a handheld electronic device. For example, the electronic device 20 is a mobile phone. The energy transfer system 10 includes a power supply end device 12, energy transfer devices 14, 16 and a device end device 18.

The power supply terminal device 12 is configured to provide external power Pex1. For example, the power supply terminal device 12 includes a power supply circuit 12a, which is, for example, an alternating current source for converting the alternating current power Pac according to the direct current power source. Power supply The setting 12 further includes, for example, an impedance matching circuit 12b for receiving the alternating current power Pac and correspondingly supplying the external power Pex1.

The energy transfer device 14 includes a coupling circuit 14a and a resonator Rs1. The coupling circuit 14a is coupled to the power supply terminal device 12 and forms a loop therewith to receive the external power Pex1. The external power Pex1 on the coupling circuit 14a is coupled to the resonator Rs1 such that the resonator Rs1 has internal power Pin1.

The energy transfer device 16 includes a coupling circuit 16a and a resonator Rs2, wherein the resonator Rs2 has a flat spiral tube structure as shown in FIG. The wire of the resonator Rs2 having a flat spiral tube structure is a strip conductor. The near-radiative fields of the resonators Rs1 and Rs2 are coupled to each other such that the non-radiative energy transfer between the resonators Rs1 and Rs2 is performed. In this way, the resonator Rs2 has the internal electric energy Pin2. Preferably, the resonator Rs2 and the resonator Rs1 have substantially the same resonant frequency, so that the energy coupling between the resonators Rs1 and Rs2 has better efficiency.

The electrical energy on the resonator Rs2 is further coupled to the coupling circuit 16a such that the coupling circuit 16a has external electrical energy Pex2. The device end device 18 forms a loop with the coupling circuit 16a to receive and provide the driving power Pd to drive the electronic device 20. For example, the device side device 18 includes an impedance matching circuit 18a for receiving and outputting external power Pex2. The device end device 18 further includes a rectifier circuit 18b for rectifying the external power Pex2 to provide DC driving power Pd to drive the electronic device 20.

The resonator Rs2 of the fourth embodiment has a flat spiral tube structure, and the wires thereof are strip conductors. The ribbon conductor has a larger cross-sectional area than a circular conductor of a conventional resonator (having a circular wire spiral tube structure). Thus, under the same volume conditions, the equivalent capacitance values of the coils in the resonator having the flat spiral tube structure are higher than the equivalent capacitance values of the conventional resonator. Furthermore, according to the general resonator formula: It can be seen that the resonant frequency f _o of the resonator decreases as the equivalent capacitance value L of the resonator and the equivalent inductance value C increase. Thus, it is known that a resonator having a flat spiral tube structure has a lower resonance frequency under the same volume conditions.

In addition, since the resonators Rs1 and Rs2 having the flat spiral tube structure have a lower resonance frequency f _o , the conversion operation between the DC power and the AC power performed by the power supply circuit 12a and the rectifier circuit 18b has better energy conversion efficiency. .

In summary, the energy transfer system of the present embodiment uses a resonator having a flat spiral tube structure to perform non-radiative energy transfer between the resonator and the resonator. Thus, the energy transmission system of the present embodiment has the advantages of smaller volume, lower resonance frequency, and higher energy conversion efficiency than the energy transmission system using the conventional resonator.

In the present embodiment, the case where the resonator Rs2 has the flat spiral tube structure as shown in Fig. 3 is taken as an example. However, the resonator Rs2 is not limited to have the structure as shown in Fig. 2. For example, the structure of the resonator Rs2 can also be as shown in FIGS. 3A and 3B. In the 3A and 3B drawings, the wires of the resonator Rs2' have the end points Ed1 and Ed2, and the end points Ed1 and Ed2 are folded in the axial direction of the resonator Rs2' of the flat spiral tube structure.

In the present embodiment, the case where the resonator Rs2 in the energy transfer device 16 is a resonator having a flat spiral tube structure is taken as an example. However, the energy transfer system 10 of the present embodiment is not limited thereto. . For example, the resonator Rs1 may be a resonator according to a flat spiral tube structure, and the resonator Rs2 has a conventional resonator structure, or the resonators Rs1 and Rs2 may be resonators having a flat spiral tube structure.

Simulation result

Assuming that the diameter of the wire cross-sectional area of the conventional circular spiral tube resonator is 1.4 mm (Millimeter, mm), the resonator of the flat-type helical tube structure of the present embodiment (which has, for example, the structure shown in FIG. 2) The wire has a line width of 3 mm, and the coil of the conventional circular spiral tube resonator and the flat spiral tube structure has an outer diameter of 3.5 cm (Centimeter, cm) and a coil height of 2 cm.

According to the foregoing conditions, the resonance frequency of the conventional circular spiral tube resonator is 32.8 megahertz (Mega Hertz, MHz). In this embodiment, the resonant frequency of the resonator of the flat spiral tube structure is 20 MHz. According to the simulation results, in the case of the same volume, the resonator of the flat spiral tube structure of the present embodiment has the advantages of lower resonance frequency and higher energy conversion efficiency between DC and AC performed by the power supply device.

If the same simulation conditions (ie, the strip conductor has a line width of 3 mm, the coil outer diameter is 3.5 cm, and the coil height is 2 cm), it is applied to the resonator of the flat spiral tube structure as described in FIG. , the simulated resonance frequency is 15 MHz. In this way, the guide of the resonator of the flat spiral tube structure can be The ends of the line are folded into the axis of the resonator of the flat spiral tube structure, which further reduces the resonance frequency of the resonator of the flat spiral tube structure.

In view of the above, the present invention has been disclosed in a preferred embodiment, and is not intended to limit the present invention. It will be apparent to those skilled in the art that the present invention can be modified and modified without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

10‧‧‧Energy transmission system

12‧‧‧Power supply unit

12a‧‧‧Power supply circuit

12b, 18a‧‧‧ impedance matching circuit

14, 16‧‧‧ energy transmission device

14a, 16a‧‧‧ coupling circuit

Rs1, Rs2, Rs2'‧‧‧ resonator

18‧‧‧ device-side device

18b‧‧‧Rectifier circuit

20‧‧‧Electronic devices

Ed1, Ed2‧‧‧ endpoint

1 is a block diagram of an energy transfer system in accordance with an embodiment of the present invention.

Fig. 2 is a view showing the configuration of the resonator Rs2 of Fig. 1.

3A and 3B are views showing the configuration of the resonator Rs2 of Fig. 1.

Rs2‧‧‧ Resonator

Claims (14)

An energy transmission system for driving an electronic device, the energy transmission system comprising: a power supply device for providing a first external electrical energy; a first energy transmission device comprising: a first coupling circuit, and the power supply The end device forms a loop to receive the first external electrical energy; and a first resonator, the first external electrical energy on the first coupling circuit is coupled to the first resonator, such that the first resonator has a first interior a second energy transmission device comprising: a second resonator having a flat-wire Solenoid structure, the second resonator having substantially the same resonant frequency as the first resonator Non-radiative energy transfer between the first and second resonators, the second resonator having a second internal electrical energy; and a second coupling circuit on the second resonator The second internal electrical energy is coupled to the second coupling circuit, the second coupling circuit having a second external electrical energy; and a device-end device forming a loop with the second coupling circuit to The second receiving external power, and accordingly provide a driving power driving the electronic device. 4. The energy transfer system of claim 1, wherein the wire of the flat spiral tube has a strip surface, the strip surface method The axial extension lines of the wire and the flat spiral tube are substantially parallel to each other. The energy transmission system of claim 2, wherein the wire of the flat spiral tube has a first end and a second end, and the first end and the second end are folded in the axial direction. In. The energy transmission system of claim 1, wherein the first resonator has a flat spiral tube structure, and the wire of the flat spiral tube has a strip surface, the normal of the strip surface and the flat The axial extension lines of the spiral tubes are substantially parallel to each other. The energy transmission system of claim 4, wherein the wire of the flat spiral tube has a first end and a second end, and the first end and the second end are folded in the axial direction In. The energy transmission system of claim 1, wherein the power supply device comprises: a power supply circuit for providing the first external power; and an impedance matching circuit for receiving the power supply circuit The first external electrical energy and outputting the first external electrical energy to the first coupling circuit. The energy transfer system of claim 1, wherein the device end device comprises: an impedance matching circuit, configured to receive the second external power provided by the second coupling circuit, and output the second external power; A rectifier circuit is configured to rectify the second external power to provide the driving power to drive the electronic device. An energy transmission system for driving an electronic device, the energy The transmission system includes: a power supply device for providing a first external electrical energy; a first energy transmission device comprising: a first coupling circuit, forming a loop with the power supply device to receive the first external electrical energy; a first resonator having a flat-wire Solenoid structure, the first external electrical energy coupled to the first resonator on the first coupling circuit, the first resonator having a first interior a second energy transmission device comprising: a second resonator having substantially the same resonant frequency as the first resonator, and non-radiative energy transfer between the first and second resonators (Non- Resonive energy transfer), the second resonator has a second internal electrical energy; and a second coupling circuit, the second internal electrical energy on the second resonator is coupled to the second coupling circuit, the second coupling circuit Having a second external electrical energy; and a device-end device, forming a loop with the second coupling circuit to receive the second external electrical energy, and thereby providing a driving electrical energy to drive the electronic device. The energy transmission system of claim 8, wherein the wire of the flat spiral tube has a strip surface, and a normal line of the strip surface and an axial extension line of the flat spiral tube substantially mutually interact with each other Parallel. The energy transmission system of claim 9, wherein the wire of the flat spiral tube has a first end and a second end, and the The first end and the second end are both folded in the axial direction. The energy transmission system of claim 8, wherein the second resonator has a flat spiral tube structure, and the wire of the flat spiral tube has a strip surface, the normal of the strip surface and the flat The axial extension lines of the spiral tubes are substantially parallel to each other. The energy transmission system of claim 11, wherein the wire of the flat spiral tube has a first end and a second end, and the first end and the second end are folded in the axial direction In. The energy transmission system of claim 8, wherein the power supply device comprises: a power supply circuit for providing the first external power; and an impedance matching circuit for receiving the power supply circuit The first external electrical energy and outputting the first external electrical energy to the first coupling circuit. The energy transmission system of claim 8, wherein the device end device comprises: an impedance matching circuit, configured to receive the second external power provided by the second coupling circuit, and output the second external power; A rectifier circuit is configured to rectify the second external power to provide the driving power to drive the electronic device.