Wireless resonance power supply system and wireless power supply table and table turntable thereof

Abstract

The utility model relates to a kind of wireless resonance power supply system and its wireless power supply article table and dining table turntable, comprising: wireless power supply circuit, wireless power supply circuit includes transmitter, wireless transmitting coil, and independently arranged passive resonant coil;Passive resonant coil is arranged in wireless transmitting coil then and / or outside;Transmitter is electrically connected wireless transmitting coil, and the resonant magnetic field generated by the energization of wireless transmitting coil acts on passive resonant coil, so that passive resonant coil generates resonant magnetic field;Wireless control circuit, wireless control circuit includes the voltage reduction chip for reducing voltage to set value and the drive chip for outputting set electric energy to wireless power supply circuit, voltage reduction chip is electrically connected drive chip;Drive chip is electrically connected transmitter and outputs set electric energy to it.The wireless transmitting coil in the system uses resonant propagation principle to make independent passive resonant coil generate resonant magnetic field, and then form magnetic sensing area, and the system is simple in control, low in manufacturing cost, and magnetic field intensity is uniform in magnetic sensing area.

Description

Technical Field

[0001] This utility model relates to a power supply system, specifically a wireless resonant power supply system and its wireless power supply table and dining table turntable. Background Technology

[0002] Wireless power supply technology can provide power without a physical medium. This includes a transmitting coil for generating an electromagnetic field and a transmitter for controlling the transmitting coil to generate a stable resonance. Due to differences in capacitive reactance and vibration frequency, in existing wireless power supply systems, a transmitter can only be paired with a single corresponding transmitting coil. When a transmitter controls more than two transmitting coils simultaneously, it may be damaged due to differences in capacitive reactance or vibration frequency. When a product needs to set up a large magnetic induction area, the current approach is to use multiple transmitting coils. This increases costs by requiring a corresponding number of transmitters. Furthermore, the overlapping of the transmitting coils leads to large fluctuations in the magnetic field in the overlapping areas (affected by the resonant frequency, resulting in magnetic field gain or cancellation and weakening), causing uneven magnetic field strength within the magnetic induction area. Additionally, since commercially available transmitting coils are circular and modular, the electromagnetic field generated by the transmitting coils cannot fully cover the magnetic induction area, also resulting in uneven magnetic field strength. Moreover, multiple coil setups increase the difficulty of system control, making multi-coil control difficult.

[0003] Therefore, it is necessary to further improve the existing wireless power supply system. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a wireless resonant power supply system and its wireless power supply table and dining table turntable. The wireless transmitting coil in this wireless resonant power supply system uses the principle of resonant propagation to make the independent passive resonant coil generate a resonant magnetic field, thereby forming a magnetic field area. This system is simple to control, has low manufacturing cost, and the magnetic field strength in the magnetic field area is uniform.

[0005] The purpose of this utility model is achieved as follows: A wireless resonant power supply system, comprising, A wireless power supply circuit is used to generate a resonant magnetic field. The wireless power supply circuit includes a transmitter, a wireless transmitting coil, and an independently set passive resonant coil. The passive resonant coil is set inside and / or outside the wireless transmitting coil. The transmitter is electrically connected to the wireless transmitting coil. The resonant magnetic field generated by the energized wireless transmitting coil acts on the passive resonant coil, causing the passive resonant coil to generate a resonant magnetic field. The resonant magnetic fields together constitute a magnetic field region. A wireless control circuit is used to control a wireless power supply circuit. The wireless control circuit includes a step-down chip for reducing the voltage to a set value and a driver chip for outputting a set electrical energy to the wireless power supply circuit. The step-down chip is electrically connected to the driver chip. The driver chip is electrically connected to the transmitter and outputs the set electrical energy to it, thereby controlling the wireless transmitting coil to generate a set resonant magnetic field.

[0006] As another specific solution, the wireless transmitting coil and the passive resonant coil are respectively set on the same plane and cooperate with each other internally and externally.

[0007] As another specific solution, one or more passive resonant coils are set up, and one or more passive resonant coils are set inside or outside the wireless transmitting coil. The ring-shaped passive resonant coil and the ring-shaped wireless transmitting coil form a magnetic field region.

[0008] As another specific solution, two or more passive resonant coils are provided, with at least one passive resonant coil located inside the wireless transmitting coil and at least one passive resonant coil located outside the wireless transmitting coil. The passive resonant coil inside and the passive resonant coil outside form a magnetic field region.

[0009] As another specific solution, a first resonant capacitor is connected in parallel to the wireless transmitting coil, and the wireless transmitting coil and the first resonant capacitor are connected in series with the transmitter.

[0010] As another specific solution, a second resonant capacitor for matching the resonant frequency is connected in series on the passive resonant coil, and the passive resonant coil and the second resonant capacitor together form a circuit.

[0011] As another specific solution, the S pin and VOUT pin on the step-down chip are connected to the VDD pin on the driver chip, the OUT pin on the driver chip is connected to the input terminal of the transmitter, and the output terminal of the transmitter is connected to the wireless transmission coil.

[0012] As another specific solution, this wireless resonant power supply system also includes a rectifier and filter circuit, which includes a rectifier bridge. The input of the rectifier bridge is connected to the city power grid, and the output of the rectifier bridge and the output of the wireless transmitting coil are respectively connected to the VDD pin on the step-down chip.

[0013] A wirelessly powered table includes a table body and the aforementioned wireless resonant power supply system. The top of the table body is a support surface for placing wireless products. A wireless transmitting coil and a passive resonant coil are respectively disposed on the table body, and the wireless transmitting coil and the passive resonant coil correspond to the support surface of the table body.

[0014] A wirelessly powered turntable includes a table body, a turntable body rotatably mounted on the table body, and the aforementioned wireless resonant power supply system. The top of the turntable body is a support surface for placing wireless products. A wireless transmitting coil and a passive resonant coil are respectively mounted on the turntable body, and the wireless transmitting coil and the passive resonant coil correspond to the support surface of the turntable body.

[0015] The beneficial effects of this utility model are as follows: The wireless control circuit controls the stable operation of the wireless transmitting coil via the transmitter. When the wireless transmitting coil is energized, it generates resonance at a set frequency. Utilizing the principle of resonance propagation (air is preferred as the propagation medium), an independent passive resonant coil (meaning not connected to a power source) near the wireless transmitting coil resonates at the set frequency. The resonant frequencies of the two coils are essentially the same (allowing for a slight error in the setting), causing both the wireless transmitting coil and the passive resonant coil to simultaneously generate resonant magnetic fields. The effective regions of these two resonant magnetic fields constitute a magnetic field region. When a wireless receiving coil is included (see...), the wireless transmitting coil... Figure 8 When a wireless product or a metal product enters the magnetic field area, the wireless product can work normally, while the metal product will generate heat. The wireless transmitting coil and the passive resonant coil are arranged in a continuous ring (specific shapes include but are not limited to circles, ellipses, polygons, and irregular shapes), which can fully and uniformly cover the magnetic field area. Therefore, the magnetic field strength at each position in the magnetic field area remains uniform. The wireless product can obtain stable power in different positions within the magnetic field area, that is, it is not limited to a specific position. The metal product can obtain stable heating effect in different positions within the magnetic field area. Through the cooperation of the wireless transmitting coil and the passive resonant coil, this system can adapt to magnetic field induction requirements of different sizes, shapes, and power. Moreover, only one transmitter is required, so the cost is low, the control is simple, the error rate is low, and the versatility is strong. Attached Figure Description

[0016] Figure 1 This is a circuit diagram of the wireless resonant power supply system in the first embodiment of this utility model.

[0017] Figure 2 This is a circuit diagram of the wireless control circuit in the first embodiment of this utility model.

[0018] Figure 3 This is a circuit diagram of the rectifier and filter circuit in the first embodiment of this utility model.

[0019] Figure 4 This is a circuit diagram of the wireless power supply circuit in the first embodiment of this utility model.

[0020] Figure 5 for Figure 4 Cross-sectional view along the HH direction.

[0021] Figure 6 This is a schematic diagram illustrating the use of the wirelessly powered storage table in the first embodiment of this utility model.

[0022] Figure 7 This is a schematic diagram illustrating the use of the wirelessly powered dining table turntable in the first embodiment of this utility model.

[0023] Figure 8 This is a circuit diagram of the radio product in the first embodiment of this utility model.

[0024] Figure 9 This is a circuit diagram of the wireless power supply circuit in the second embodiment of this utility model.

[0025] Figure 10 This is a circuit diagram of the wireless power supply circuit in the third embodiment of this utility model.

[0026] Figure 11 This is a circuit diagram of the wireless power supply circuit in the fourth embodiment of this utility model.

[0027] Figure 12 This is a circuit diagram of the wireless power supply circuit in the fifth embodiment of this utility model. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] First embodiment: See Figures 1-5 The wireless resonant power supply system involved in this embodiment includes, Wireless power supply circuit A is used to generate a resonant magnetic field. Wireless power supply circuit A includes a transmitter 1, a wireless transmitting coil 2, and an independently set passive resonant coil 4. The passive resonant coil 4 is set inside and outside the wireless transmitting coil 2. The transmitter 1 is electrically connected to the wireless transmitting coil 2. The transmitter 1 controls the wireless transmitting coil 2 to generate a resonance at a set frequency, thereby generating a set resonant magnetic field. The resonant magnetic fields together constitute a magnetic field region. The resonant magnetic field generated by the energized wireless transmitting coil 2 acts on the passive resonant coil 4, causing the passive resonant coil 4 to generate a resonant magnetic field of the same frequency. The resonant magnetic field generated by the wireless transmitting coil 2 and the resonant magnetic field generated by the passive resonant coil 4 act on the radio products or metal products within the effective range, so that the radio products can obtain electrical energy and the metal products can generate heat. Wireless control circuit B is used to control wireless power supply circuit A. Wireless control circuit B includes a step-down chip 7 for reducing the voltage to a set value and a driver chip 8 for outputting a set amount of electrical energy to wireless power supply circuit A. The step-down chip 7 is electrically connected to the driver chip 8. The driver chip 8 is electrically connected to the transmitter 1 and outputs a set amount of electrical energy to it, thereby controlling the wireless transmitting coil 2 to generate a set resonant magnetic field.

[0030] In this embodiment, the wireless control circuit controls the operation of the wireless transmitting coil 2 through the transmitter 1. The wireless transmitting coil 2 generates resonance at a set frequency when energized. Utilizing the principle of resonance propagation (preferably air propagation), the passive resonant coil 4 near the wireless transmitting coil 2 generates resonance at the set frequency. The resonant frequencies of the two coils are basically the same, and the wireless transmitting coil 2 and the passive resonant coil 4 generate resonant magnetic fields simultaneously. Through the mutual cooperation between the wireless transmitting coil and the passive resonant coil, this system can adapt to magnetic field induction requirements of different sizes, shapes, and power. Moreover, it only requires one transmitter, thus it is low in cost, simple to control, has a low error rate, and is highly versatile.

[0031] Furthermore, in this embodiment, the wireless transmitting coil 2 and the passive resonant coil 4 are respectively disposed on the same plane, making them suitable for flat products, such as storage tables or dining tables. The wireless transmitting coil 2 and the passive resonant coil 4 are each wound from a power supply line E, forming a continuous circle. Depending on actual needs, they can also be wound into elliptical, polygonal, or irregular shapes. In this embodiment, the power supply line E is wound in an inward and outward manner (see...). Figure 5 This minimizes the coil thickness.

[0032] Further, see Figure 4 and Figure 5 In this embodiment, two (or more) passive resonant coils 4 are provided. One passive resonant coil 4 is located inside the wireless transmitting coil 2, and the other passive resonant coil 4 is located outside the wireless transmitting coil 2. There is a set gap L between the wireless transmitting coil 2 and the passive resonant coil 4. The size of the gap L is such that the resonance generated by the wireless transmitting coil 2 effectively acts on the passive resonant coil 4. The inner passive resonant coil 4 and the outer passive resonant coil 4 form a magnetic field region D (there is a small amount of resonance scattering on both the inner and outer sides of the magnetic field region D). Radio products or metal products can work normally when placed within the projection range above the magnetic field region D. The effective area of ​​the resonant magnetic field generated by the wireless transmitting coil 2 and the resonant magnetic field generated by the passive resonant coil 4 forms a circular magnetic field region D. When a radio product with a wireless receiving coil 15 is provided (see...), the magnetic field region D is formed. Figure 8 When a wireless product or a metal product enters the magnetic field area D (circuit diagram), the wireless product can work normally, while the metal product will generate heat. The wireless transmitting coil 2 and the passive resonant coil 4 are arranged in a continuous ring, which can fully and uniformly cover the magnetic field area D. Therefore, the magnetic field strength at each position in the magnetic field area remains uniform. The wireless product can obtain stable power when placed in different positions in the magnetic field area, that is, it is not limited to a specific position. The metal product can obtain stable heating effect when placed in different positions in the magnetic field area.

[0033] Furthermore, a second resonant capacitor 5 for matching the resonant frequency is connected in series on the passive resonant coil 4. The passive resonant coil 4 and the second resonant capacitor 5 together form a circuit (the two ends of the power line E are electrically connected to the two ends of the second resonant capacitor 5 respectively). By adjusting the type of the power line E (specifically, adjusting the diameter, resistance value, and other parameters of the power line E) and / or the parameters of the second resonant capacitor 5, the capacitive reactance of the passive resonant coil 4 can be adjusted to ensure that the resonant frequencies of the wireless transmitting coil 2 and the passive resonant coil 4 are consistent.

[0034] Furthermore, a first resonant capacitor 3 is connected in parallel to the wireless transmitting coil 2 to stabilize the resonant frequency of the wireless transmitting coil 2. The wireless transmitting coil 2 and the first resonant capacitor 3 are connected in series with the transmitter 1.

[0035] Further, see Figure 1 and Figure 2 The CS pin and VOUT pin on the step-down chip 7 are connected to the VDD pin on the driver chip 8, the OUT pin on the driver chip 8 is connected to the input terminal of the transmitter 1, the output terminal of the transmitter 1 is connected to the wireless transmitting coil 2, and the driver chip 8 outputs a 31.5kHz frequency resonance to the transmitter 1.

[0036] Further, see Figure 3 The wireless resonant power supply system also includes a rectifier and filter circuit C, which includes a rectifier bridge 6. The input of the rectifier bridge 6 is connected to the city power grid to access 220V AC power. The output of the rectifier bridge 6 and the output of the wireless transmitting coil 2 are respectively connected to the VDD pin on the step-down chip 7. The rectifier bridge 6 regulates the 220V AC power to 310V AC power, which is then stepped down to 12V DC power by the step-down chip 7 to supply the driver chip 8.

[0037] See Figure 6 This embodiment relates to a wirelessly powered storage table, which includes a table body 10 and the aforementioned wireless resonant power supply system. The top of the table body 10 serves as a support surface for placing wireless products. The wireless resonant power supply system is mounted on the table body 10, with the wireless transmitting coil 2 and the passive resonant coil 4 corresponding to the support surface at the top of the table body 10. The tabletop of the table body 10 is preferably made of a non-metallic material, and the wireless transmitting coil 2 and the passive resonant coil 4 are concealed within the table body 10. Storage tables can include dining tables, tea tables, coffee tables, etc.

[0038] See Figure 7The wireless power supply turntable involved in this embodiment includes a turntable body 11 rotatably mounted on the tabletop and the aforementioned wireless resonant power supply system. The top of the turntable body 11 is a support surface for placing wireless products. The wireless resonant power supply system is mounted on the turntable body 11, with the wireless transmitting coil 2 and the passive resonant coil 4 corresponding to the support surface of the turntable body 11. The turntable body 11 is preferably made of non-metallic material, and the wireless transmitting coil 2 and the passive resonant coil 4 are respectively hidden at the bottom of the turntable body 11.

[0039] This wireless resonant power supply system is compatible with metal containers 12 made of metal and wireless products with wireless power connection circuitry; (See attached image) Figure 8 The circuit diagram of a wireless product is shown. The wireless product includes heating appliances such as electric kettles 13 or electric hot pots 14. Its circuit includes a wireless receiving coil 15, a third resonant capacitor 16, and a heating element 17. The wireless receiving coil 15, the third resonant capacitor 16, and the heating element 17 are connected in parallel. The heating element 17 can be graphene or a heating wire. When the wireless product is placed above the magnetic field area D, it provides the electrical energy required for its operation. When the metal container 12 is placed above the magnetic field area D, it generates heat for heat preservation or heating.

[0040] Second embodiment: See Figure 9 The wireless resonant power supply system involved in this embodiment differs from the first embodiment in that: one (or more) passive resonant coils 4 are provided, and the passive resonant coils 4 are located inside the wireless transmitting coil 2. The annular passive resonant coils 4 and the annular wireless transmitting coil 2 form a magnetic field region D.

[0041] The other undescribed parts are basically the same as those in the first embodiment, and will not be analyzed or explained in detail here.

[0042] Third embodiment: See Figure 10 The wireless resonant power supply system involved in this embodiment differs from the first embodiment in that: one (or more) passive resonant coils 4 are provided, and the passive resonant coils 4 are provided outside the wireless transmitting coil 2. The ring-shaped passive resonant coils 4 and the ring-shaped wireless transmitting coil 2 form a magnetic field region D.

[0043] The other undescribed parts are basically the same as those in the first embodiment, and will not be analyzed or explained in detail here.

[0044] Fourth embodiment: See Figure 11 The wireless resonant power supply system involved in this embodiment differs from the first embodiment in that the wireless transmitting coil 2 and the passive resonant coil 4 are respectively arranged in a rectangular shape, including squares or rectangles.

[0045] The other undescribed parts are basically the same as those in the first embodiment, and will not be analyzed or explained in detail here.

[0046] Fifth embodiment: See Figure 12 The wireless resonant power supply system involved in this embodiment differs from the first embodiment in that the wireless transmitting coil 2 and the passive resonant coil 4 are respectively arranged in an octagonal shape. In addition to the octagonal shape, they can also be arranged in a pentagonal, hexagonal, dodecagonal or other polygonal shapes.

[0047] The other undescribed parts are basically the same as those in the first embodiment, and will not be analyzed or explained in detail here.

[0048] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wireless resonant power supply system, characterized in that: include, A wireless power supply circuit (A) is used to generate a resonant magnetic field. The wireless power supply circuit (A) includes a transmitter (1), a wireless transmitting coil (2), and an independently set passive resonant coil (4). The passive resonant coil (4) is set inside and / or outside the wireless transmitting coil (2). The transmitter (1) is electrically connected to the wireless transmitting coil (2). The resonant magnetic field generated by the energized wireless transmitting coil (2) acts on the passive resonant coil (4), causing the passive resonant coil (4) to generate a resonant magnetic field. The resonant magnetic fields together constitute the magnetic field region (D). The wireless control circuit (B) is used to control the wireless power supply circuit (A). The wireless control circuit (B) includes a step-down chip (7) for reducing the voltage to a set value and a drive chip (8) for outputting set electrical energy to the wireless power supply circuit (A). The step-down chip (7) is electrically connected to the drive chip (8). The drive chip (8) is electrically connected to the transmitter (1) and outputs set electrical energy to it, thereby controlling the wireless transmitting coil (2) to generate a set resonant magnetic field.

2. The wireless resonant power supply system according to claim 1, characterized in that: The wireless transmitting coil (2) and the passive resonant coil (4) are respectively set on the same plane and are matched internally and externally.

3. The wireless resonant power supply system according to claim 1, characterized in that: One or more passive resonant coils (4) are provided. One or more passive resonant coils (4) are provided inside or outside the wireless transmitting coil (2). The ring-shaped passive resonant coil (4) and the ring-shaped wireless transmitting coil (2) form a magnetic field region (D).

4. The wireless resonant power supply system according to claim 1, characterized in that: Two or more passive resonant coils (4) are provided, at least one passive resonant coil (4) is provided inside the wireless transmitting coil (2), and at least one passive resonant coil (4) is provided outside the wireless transmitting coil (2). The passive resonant coil (4) inside and the passive resonant coil (4) outside form a magnetic field region (D).

5. The wireless resonant power supply system according to claim 1, characterized in that: A second resonant capacitor (5) for matching the resonant frequency is connected in series on the passive resonant coil (4), and the passive resonant coil (4) and the second resonant capacitor (5) together form a circuit.

6. The wireless resonant power supply system according to claim 1, characterized in that: The wireless transmitting coil (2) is connected in parallel with a first resonant capacitor (3), and the wireless transmitting coil (2) and the first resonant capacitor (3) are connected in series with the transmitter (1).

7. The wireless resonant power supply system according to claim 1, characterized in that: The CS pin and VOUT pin on the step-down chip (7) are connected to the VDD pin on the driver chip (8), the OUT pin on the driver chip (8) is connected to the input terminal of the transmitter (1), and the output terminal of the transmitter (1) is connected to the wireless transmission coil (2).

8. The wireless resonant power supply system according to claim 1, characterized in that: It also includes a rectifier filter circuit (C), which includes a rectifier bridge (6). The input of the rectifier bridge (6) is connected to the city power grid, and the output of the rectifier bridge (6) and the output of the wireless transmitting coil (2) are respectively connected to the VDD pin on the step-down chip (7).

9. A wirelessly powered storage table, comprising a table body (10), the top of which is a support surface for placing wireless products; characterized in that: It also includes the wireless resonant power supply system as described in any one of claims 1-8, wherein the wireless transmitting coil (2) and the passive resonant coil (4) are respectively disposed on the table body (10), and the wireless transmitting coil (2) and the passive resonant coil (4) are respectively corresponding to the support surface of the table body (10).

10. A wirelessly powered turntable, comprising a table body (10) and a turntable body (11) rotatably mounted on the table body (10), wherein the top of the turntable body (11) is a support surface for placing wireless products; characterized in that: It also includes the wireless resonant power supply system as described in any one of claims 1-8, wherein the wireless transmitting coil (2) and the passive resonant coil (4) are respectively disposed on the turntable body (11), and the wireless transmitting coil (2) and the passive resonant coil (4) correspond to the support surface of the turntable body (11).

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