CN223729506U - System for wireless power transmission and electrical appliance system - Google Patents

Abstract

This utility model relates to a system and electrical system for wireless power transmission. The system has a transmitter unit on one side of a panel, equipped with a primary coil for receiving alternating current, causing the primary coil to emit a magnetic field. The system also has a receiver unit on the opposite side of the panel, equipped with a secondary coil that generates alternating current when subjected to a magnetic field. The system includes a positioning system with a guide device on the transmitter or receiver unit and a locator on another corresponding unit. Thus, when the user installs the system, they can use the locator to check the position of the guide device on the other side of the panel and align the transmitter and receiver units.

Description

System for wireless power transmission and electrical appliance system

Technical Field

The present utility model relates to a system for wireless transmission of power and an electrical appliance system. For example, certain aspects of the utility model relate particularly to systems for wirelessly transmitting power on a glazing panel or separation barrier or panel of a residence and/or systems for facilitating installation thereof.

Background

Different special appliances are used in combination with the house. For example, in a typical home, many users will install various appliances, such as doorbell, surveillance camera, floodlight, insect repellent, lighting system, safety alarm, etc., outside the home, which usually require power to operate. To address the need for power sources, some of these appliances are designed to be powered by dc batteries. However, battery power is not a reliable source of power, as battery power generally cannot last for a long time. When the battery power is exhausted, the appliance will cease to operate. In an outdoor environment, the battery is also prone to degradation relatively quickly, which is inconvenient, and in the case of monitoring alarms, for example, an inactive safety system poses a safety risk to the tenant of the home.

In order to address the need to provide a constant power supply without relying on a direct current battery, it is proposed to use solar energy systems to generate and power such appliances. While the use of solar energy systems can provide electricity at a lower cost, solar energy systems are often limited in many cases. For example, solar energy systems cannot operate in shadow areas or in places where sunlight is insufficient. Furthermore, reliable solar systems require solar panels of sufficiently large size, but the environment of the residential location may not allow for the installation of such sufficiently large solar panels.

Another approach to address the need to provide a constant power supply without relying on a dc battery or solar energy system is to install an electrical outlet at a location outside the residence where the appliance is installed. However, this is often complex or impractical because of the cost and complexity of hiring an electrician to perform the associated electrical work if/when multiple appliances along the perimeter are installed at the perimeter of a residence or at various external locations.

Another way to address the need to provide constant power without relying on dc batteries or solar energy systems or hiring electricians to install a large number of outdoor ac power outlets is to drill holes or mechanically open up channels in different locations on the walls of the house by non-professional tenants of the house and install electrical extension lines from nearby indoor power outlets to outdoor locations through the drill holes. However, this approach may be far from a realistic or reasonable solution. In part, because drilling holes or channeling through the walls of a residence can lead to unexpected complications, such as interfering with the facilities on the walls, which can exceed the capabilities of non-professional users. Furthermore, the implementation of such modification projects at a cursory rate may not meet building codes/regulations.

The present utility model aims to solve the above problems or at least to provide the public with an alternative.

Disclosure of utility model

According to a first aspect of the present utility model there is provided a system for wireless power transmission from one side of a transparent or translucent panel to an opposite side of the panel, comprising i) a transmitter unit mountable on one side of the panel, wherein the transmitter unit comprises a primary coil for receiving alternating current such that the primary coil emits a magnetic field, and ii) a receiver unit mountable on an opposite side of the panel, wherein the receiver unit comprises a secondary coil which generates alternating current when subjected to a magnetic field from the primary coil, wherein the transmitter unit is provided with a first cable, one end of which is connectable to a power socket for receiving alternating current from the power socket, the receiver unit comprises a second converter for converting alternating current generated by the secondary coil into direct current for supply to an electrical appliance mountable or mounted in the vicinity of the receiver unit, and wherein the system comprises a positioning system provided with guiding means on the transmitter unit or the receiver unit and a positioning means on the other respective unit, whereby when the system is mounted by a user the user is able to check the position of the guiding means on the transmitter unit and to maximally expose the secondary coil to the magnetic field.

Preferably, the panel may be planar and non-metallic, and/or the thickness of the panel may be up to 40mm, preferably up to 30mm, more preferably up to 20mm.

Suitably, the system may comprise a transformer for reducing the voltage of the 110V to 240V ac power input from the power outlet to 5V to 24V, thereby generating the reduced voltage ac power to be supplied to the primary coil, wherein the transformer can be located at one end of the cable. The system may include a first converter for raising the frequency of the alternating current input from the power outlet from 50Hz to 60Hz to 50kHz to 300kHz, thereby generating a current with a raised frequency to be supplied to the primary coil. In one embodiment, the elevated frequency may be 105kHz to 210kHz. The exact rise frequency depends on the requirements of the appliance receiving the alternating current.

Advantageously, the system may comprise a controller limiting the output voltage and output current of the transmitter unit to the primary coil to 24V and 1000mA, respectively. The controller may be configured to allow bi-directional communication between the transmitter unit and the receiver unit for controlling the predetermined maximum magnetic field output by the primary coil.

In one embodiment, the guide means may be a marking on a receiver unit secured to one side of the panel and the locator is an opening provided on the transmitter unit, whereby matching the opening with the marking allows the transmitter unit and the receiver unit to be aligned. The opening may be provided in the center of the transmitter unit surrounded by the primary coil. In a specific embodiment, the marker may be arranged in the center of the receiver unit surrounded by the secondary coil.

In one embodiment, the guide means may be a first protrusion extending from the receiver unit and the locator may be a second protrusion extending from the transmitter unit, and wherein the first protrusion and the second protrusion have the same profile.

In another embodiment, the guide may be a mark defining a shape provided on the transmitter unit, and the locator may be a boundary defining the receiver unit of the same shape.

In another alternative embodiment, the guide may be the boundary of the transmitter unit defining the contour and the locator may be the boundary of the receiver defining the same contour.

In another alternative embodiment, the guide may be a boundary defining a receiver element of a first geometry and the locator may be a boundary defining a transmitter element of a second geometry smaller than the first geometry.

According to a second aspect of the present utility model, there is provided an electrical system comprising the above-described power transmission system and an electrical appliance, wherein the electrical appliance is selected from the group comprising an outdoor camera, a security light or an illumination light.

According to a third aspect of the present utility model there is provided a system for wireless power transmission from one side of a non-metallic panel to an opposite side of the panel comprising or wherein i) a transformer for reducing the voltage of an alternating current of 110V to 240V input from a power outlet of a house to 5V to 24V thereby producing a reduced voltage alternating current, ii) a transmitter unit mountable on one side of the panel wherein the transmitter unit is provided with a first converter for increasing the frequency of the voltage from 50Hz to 60Hz to 50kHz to 300kHz thereby producing a frequency-increased current, iii) the transmitter unit is provided with a primary coil for receiving the voltage of the alternating current from 5V to 24V and increasing the frequency from 50kHz to 300kHz thereby producing a magnetic field, iv) a receiver unit mountable on an opposite side of the panel wherein the receiver unit comprises a secondary coil which when subjected to the magnetic field generates an alternating current, V) a second converter for converting the alternating current generated in the secondary coil to a direct current for supply to or mounting in the vicinity of the receiver unit and preferably to a thickness of the receiver unit, preferably up to 20mm, and vice versa, preferably up to a thickness of the panel, of 20mm.

Preferably, the system may comprise a controller limiting the output voltage and the output current of the transmitter unit to 24V and 1000mA, respectively, wherein the controller is configured to allow bi-directional communication between the transmitter unit and the receiver unit for controlling the predetermined maximum magnetic field output by the primary coil, and wherein the receiver unit is configured to output a voltage of up to 24V.

Suitably, the system may comprise a positioning system provided with a guide on the transmitter unit or the receiver unit and a locator on the other respective unit, whereby when the system is installed by a user, the user can use the locator to check the position of the guide on the panel and to locate and align the transmitter unit and the receiver unit, with the receiver unit maximally exposed to the magnetic field, the guide being a marker fixed on the receiver unit on one side of the panel, the locator being an opening provided on the transmitter unit, whereby the opening is matched to the marker, allowing alignment of the transmitter unit and the receiver unit, and the opening being provided in the centre of the transmitter unit surrounded by the primary coil, and the marker being provided in the centre of the receiver unit surrounded by the secondary coil.

Advantageously, the guide means may be a first protrusion extending from the receiver unit, the locator may be a second protrusion extending from the transmitter unit, and wherein the first protrusion and the second protrusion may share the same profile.

In one embodiment, the guide may be a mark defining a shape provided on the transmitter unit, and the locator is a boundary defining the receiver unit of the same shape.

In one embodiment, the guide may be the boundary of a contoured emitter unit and the locator may be the boundary of a contoured receiver.

In an alternative embodiment, the guiding means may be a boundary of the receiver unit defining a first geometry and the locator is a boundary of the transmitter unit defining a second geometry smaller than the first geometry.

Drawings

Fig. 1 is a schematic diagram showing a residence having an exterior providing walls and windows on which a first embodiment of a power transmission system according to the present utility model may be mounted;

FIGS. 2a and 2b are views of the indoor and outdoor environments, respectively, of the residence of FIG. 1;

FIG. 3 is an enlarged view of the indoor environment of FIG. 2 a;

FIG. 4a is a close-up view of the outdoor environment of FIG. 2b, showing a first embodiment of a portion of an installed power transmission system according to the present utility model;

FIG. 4b is an enlarged view of the indoor environment of FIG. 2a, showing the embodiment of FIG. 4 a;

Fig. 5a and 5b are schematic diagrams showing portions of a transmitter unit and a receiver unit of the power transmission system of fig. 4a and 4b, respectively;

fig. 6 is a schematic diagram showing a power transmission system installed in the residence of fig. 1;

Fig. 7 is an alternative schematic diagram showing a first embodiment of the power transmission system of fig. 4a and 4 b;

fig. 8 is another schematic diagram showing the installation of the first embodiment of the power transmission system of fig. 7;

Fig. 9a, 9b and 9c are additional schematic diagrams illustrating the installation of the first embodiment of the power transmission system of fig. 4a and 4 b;

Fig. 10 is a schematic diagram showing a second embodiment of the power transmission system according to the present utility model;

fig. 11 is a schematic diagram showing a third embodiment of the power transmission system according to the present utility model;

fig. 12 is a schematic view showing a fourth embodiment of the power transmission system according to the present utility model, and

Fig. 13 is a schematic diagram showing a fifth embodiment of the power transmission system according to the present utility model.

Detailed Description

The present utility model relates generally to a system for wirelessly transmitting power through an obstacle (e.g., a flat plate such as a glass plate) or gap. For example, power may be transmitted wirelessly through the glass pane of a window from one side of a residential window to the other side of the window. In another case, the barrier (typically planar) may be made of a non-metallic material, for example, a ceramic plate, drywall, wood, cardboard, or double glazing with a vacuum or air space therebetween.

By way of example, fig. 1 shows a house of a house. The house has the form of a normal living house and fig. 1 is a view showing the front face of a house 2. The front side of the house 2 is provided with a number of windows 4, 6, 8, including a main window 4 and a front door 10 of the living room. In this example, the window is provided with a transparent glass plate 4a.

Fig. 2a and 2b show the interior and exterior of a living room of a residence, respectively. In particular, fig. 2a is a view of a living room showing a main window 4 looking out over the frontal area of the house 2 and other houses opposite the street. Fig. 2a shows that the living room is provided with a power outlet 12 (110V or 240V) in the lower left corner of the wall where the main window 4 is located. Fig. 2b corresponds to fig. 1, although fig. 2b is a close-up view showing the main window 4. As can be seen from fig. 1 and 2b, no power outlet is provided on the outside front of the house 2.

Fig. 3 corresponds to fig. 2a, but in an enlarged view, the environment of the living room is shown more clearly.

Fig. 4a and 4b correspond to fig. 2b and 2a, respectively, although the home 2 is equipped with a first embodiment of the power transmission system according to the utility model. The power transmission system has two main parts, namely a transmitter unit 14 and a receiver unit 16.

Fig. 4a shows a receiver unit 16 comprising a receiver 17 in the form of a disc structure and a cable 17a for supplying power to an electrical appliance, in this case a security camera.

Fig. 4b shows the living room with the transmitter unit 14 installed. In this embodiment, the transmitter unit 14 includes a transmitter 18 in the form of a disc structure and a cable 20 extending from the disc structure for establishing an electrical connection with the electrical outlet 12 via a power plug 22. In this embodiment, the transmitter unit 14 is provided with a primary coil 25 made of copper wire wound in a disc structure. In this embodiment, the transmitter unit 14 is provided with a transformer for reducing the alternating voltage from the power outlet 12 from 110V (or 240V) to 5V to 24V. The transmitter unit 14 is further provided with a first converter for raising the frequency of the alternating current from the power outlet 12 from 50Hz-60Hz to 50kHz to 300kHz. The transformer may be located in the power plug 22 or may exist as a unit external to the power plug 22. The first transducer may be located in a disk structure of the emitter 18.

Fig. 5a and 6 show the internal structure of the emitter 18. Fig. 5a is a schematic diagram showing the primary coil 25 and a portion of the cable 20 extending downward from the transmitter 18. For illustration, the housing 30 of the emitter 18 housing these components is removed, and the primary coil 25 is essentially a long copper wire formed as a loop 25, defining an opening 26 in the center of the loop 25. Fig. 6 schematically illustrates that when the cable 20 is connected to the power outlet 16, the alternating current passing through the primary coil 24 will generate a magnetic field or flux, as indicated by the loop wire 28. Also in the center of the housing 30 of the emitter 18 are cut-out areas 26a, 26b. Due to the presence of the opening 26 defined by the loop of the primary coil and the cut-out areas 26a, 26b of the housing 30, a see-through hole is also provided in the centre of the transmitter unit. Please see line A-A'. See also fig. 7.

Fig. 5b shows the internal structure of the receiver 17 of the receiver unit 16. The receiver unit 16 likewise comprises a receiver 17 having a housing accommodating a secondary coil 34. Similar to the primary coil 24 of the transmitter 18, the secondary coil 34 of the receiver 17 of the receiver unit 16 also defines an opening 36. However, unlike the housing 30 of the transmitter 18, the housing 32 of the receiver 17 is not provided with any cutout region at its center. In contrast, the housing 32 facing the side facing the glass pane is provided with protruding guides 38 in the form of markings in its centre, the receiver 17 having no see-through hole in the centre and only a visible marking in the centre, since the housing 32 has no cut-out area. See also fig. 7.

The receiver unit 16 has a second converter for converting the alternating current generated in the secondary coil 34 into direct current to be supplied to an electric appliance. The second converter also acts as a voltage regulator to stabilize the converted direct current to a predetermined fixed voltage, for example 5V or 9V. This is to protect the connected appliance from over-power or fire.

The system also includes a controller as a security feature. Specifically, the controller limits the voltage and current output from the transmitter unit to 24v 1000ma, respectively, so that the receiver coil does not receive excessive power and does not generate excessive voltage or current therefrom.

Fig. 6 schematically illustrates that when the primary coil 24 generates a magnetic field, the magnetic field will cause an alternating current to be generated in the secondary coil 34. The conversion circuit from the second converter converts the alternating voltage into a direct voltage. The receiver unit 16 is also provided with a cable 40 for supplying dc power from the conversion circuit for use by the power supply. In the case of fig. 6, a cable 40 extends upwardly from the housing 32 of the receiver 17 and connects to the appliance, which in this embodiment is a surveillance camera 42.

From the above design, it can be appreciated that a magnetic field is generated when a current pulse (alternating current) is passed through the wires of the primary coil. The presence of adjacent secondary coils in the moving magnetic field affects the generation of alternating current in the secondary coils. Thus, power is transmitted from the transmitter unit 14 on one side of the window 4 through the glass pane 4a to the receiver unit 16 on the other side of the window 4. It should be noted that when the transmitter unit 14 is installed on the indoor (or interior) side of the window 4 and the receiver unit 16 is installed on the outdoor (or exterior) side of the window 4, no drilling is required. Effectively, reliable power is transferred from the living room power outlet 12 to the appliance 42 via the transmitter unit 14 and the receiver unit 16.

Fig. 7 illustrates an aspect of an embodiment in more detail. The housing 30 of the transmitter unit 14 has two halves, a rear housing member 30a for attachment to the indoor side of the glass plate and a front housing member 30b facing away from the glass plate 4 a. The front and rear housing members 30a, 30b are secured together by screws and together define a cavity for receiving the primary coil 24 and other electronics, with the cable 20 extending from the transmitter 18 out of the housing 30 for connection to the power outlet 16.

Still referring to fig. 7, as such, the housing 32 of the receiver unit 16 has two halves, a rear housing member 32b for attachment to the outdoor side of the glass sheet and a front housing member 32a facing away from the glass sheet. The front and rear housing members 32a, 32b are secured together by screws and together define a cavity for receiving the secondary coil 34 and other electronics, with the cable 40 extending from the receiver 17 out of the housing 32 for connection to an appliance. As mentioned above, there is a protruding marking 38 in the centre of the side of the housing 32 of the receiver 17 facing the glass plate.

It is a feature of at least some embodiments of the present utility model to position the transmitter 18 of the transmitter unit 14 and the receiver 17 of the receiver unit 16 on opposite sides of the glass sheet 4a so that they are aligned. The positioning may be considered as an alignment system. It should be appreciated that if the transmitter 18 and receiver 17 are not aligned or sufficiently aligned, the magnetic field generated by the primary coil 24 may not be transferred or may not be sufficiently transferred to the secondary coil 34 such that the receiver unit does not generate or does not sufficiently generate direct current, and one challenge is that positioning the transmitter 18 and receiver 17 on opposite sides of the glass sheet in an aligned manner may be cumbersome due to the presence of the glass sheet.

Fig. 8 and 9a to 9c are schematic diagrams of another aspect of the first embodiment of the power transmission system of the present utility model. Specifically, fig. 8 and 9a to 9c show the configuration and installation of the power transmission system of this embodiment. The transmitter unit and the receiver unit share the same circular outline, except that the housing 30 of the transmitter unit 14 has a see-through hole 26, 26a, 26b in the center thereof and a protruding marking 38 in the center of the receiver unit. Furthermore, in this embodiment, the transmitter unit and the receiver unit share the same circular size. During installation, the user may first secure the receiver 17 to the outdoor side of the glass plate, for example, in the upper left corner of the main window, such that the protruding mark 38 is visible on the other side via the glass plate. The fixation can be achieved by using double sided tape or Velcro tape. After the receiver 17 is fixed to the upper left corner of the glass plate 4a, the user can enter the living room and install the transmitter 18 on the other side of the glass plate. To ensure that the emitter 18 is aligned with the receiver 16, the user positions the emitter 18 on the indoor side of the glass sheet such that the see-through holes 26, 26a, 26b coincide with the protruding markings 38. Specifically, the user will slide the emitter 18 in the chamber of the glass plate until the indicia 38 of the receiver 17 are visible from the viewing holes 26, 26a, 26b of the emitter 18. Once the mark 38 is seen in the center of the see-through holes 26, 26a, 26b, the transmitter 18 and receiver 16 are aligned. As described above, the transmitter 18 and the receiver 17 share the same circular profile. Thus, it will be appreciated that when the edge of the housing 30 of the transmitter 18 matches the edge of the housing 32 of the receiver 17, the transmitter 18 and receiver 17 are aligned. In other words, this embodiment of the power transmission system has two positioning and alignment features. First, the see-through holes 26, 26a, 26b of the emitter 18 are matched with the protruding markings 38 of the receiver 17 as a first indication of alignment and the circular edge of the emitter 18 is matched with the circular edge of the receiver 17 as a second indication of alignment. Please refer in particular to fig. 9a to 9c. In any case, it is contemplated that in other embodiments, the housing of the receiver unit may alternatively be configured with a see-through hole in its center, while the housing of the transmitter unit is provided with protruding indicia.

Experiments leading to the present utility model have shown that the utility model is feasible as long as the thickness of the barrier or gap between the transmitter and the receiver is not too great. However, there are preferred parameters in the context of the present utility model. Table 1 below summarizes the results with respect to thickness/gap and current received or generated from the receiver unit.

TABLE 1

Table 1 shows that the current generated at the receiver unit at 5V ranges from 0.25A to 0.36A, depending on the material of the barrier panel, at a distance or interval of 40 mm. This current range is sufficient to reliably operate a range of appliances. When the material of the barrier is a single layer glass plate, the current generated at the receiver unit at 5V ranges from 1.36A to 0.29A, depending on the thickness of the barrier panel. This current range is also sufficient to reliably operate a range of appliances.

Other embodiments of positioning systems for assisting in the alignment of the transmitter unit and the receiver unit are explained as follows. Furthermore, experiments were also performed with respect to the use of panels made of different non-metallic materials.

Fig. 10 is a schematic view of an alternative embodiment of a positioning system of a power transmission system according to the utility model. In this embodiment, the receiver unit 116 also has a receiver 117 having a housing 132 made of a larger square portion (lower portion) 133 and a smaller square portion (upper portion) 135 protruding upward from the larger square portion 133. The smaller square portion 135 defines square edges that act as guides or markers. The emitter unit 114 also has an emitter 118 having a housing 130, but made of a circular portion 131a and a square portion 131b protruding upward from the circular portion 131a, the upper square portion 131b being significantly smaller in size than the lower circular portion 131a. It should be noted, however, that the upper square portion 135 of the receiver 117 and the upper square portion 131b of the transmitter 118 share the same square profile. The receiver 117 may be secured to the outdoor side of the glass sheet during installation. The user may then enter the other side of the glass sheet and position the emitter 118 by moving the emitter 118 such that the edge of the upper square 131b of the emitter 118 matches the edge of the upper square 135 of the receiver 117. In any case, it is contemplated that in other embodiments, the upper portion of the housing of the receiver unit and the upper portion of the housing of the transmitter unit may take shapes other than square or rectangular. As long as the upper portions (or protrusions) share the same contour, the protrusions may be used as markers, thereby forming a positioning system.

Fig. 11 is a schematic view of an alternative embodiment of a positioning system of a power transmission system according to the utility model. In this embodiment, the receiver unit 216 also has a transmitter 218 with a housing 232, but generally has a square profile without any protrusions. The emitter unit 214 likewise has an emitter 217 which has a housing 230 with a circular contour. However, the side of the housing 230 of the transmitter 218 facing the glass plate is provided with a marking 231 (indicated by a dashed line defining a square) sharing the same square dimensions as the housing 232 of the receiver 217. During installation, a user may first secure the transmitter 218 to the upper left corner of the glass panel such that the square indicia 231 is visible from the opposite side of the glass panel in front of the house. The user then walks to the front of the house, positioning the receiver 217 on the other side of the glass sheet such that the edge of the housing 232 of the receiver 217 matches the indicia 232 on the side of the housing 230 of the transmitter 218 facing the glass sheet. In any event, it is contemplated that the emitter 218 may be configured in a square (or rectangular) shape, while the housing of the receiver 217 provides a matching square or rectangular indicia. As long as the shape of one of the housings matches the marking on the other housing, a viable positioning system for alignment purposes can still be constructed.

In an alternative embodiment, the circular housing 230 of the emitter 218 is just smaller in size than the housing 232 of the receiver unit 217 such that when the edge of the emitter 218 just touches the edge of the square housing, the emitter 218 and the receiver unit 217 are aligned, or the housing 232 of the receiver unit 217 may be circular, the housing of the emitter 218 may be square, and just smaller than the receiver unit 217 such that when the four corners of the square emitter 218 touch the circular edge of the receiver unit 217, the two units are aligned.

Fig. 12 is a schematic diagram showing an alternative embodiment of a positioning system of the power transmission system according to the utility model. In this embodiment, the receiver unit 316 also has a receiver 317 having a housing 332 with a circular profile without any protrusions or see-through holes. The emitter unit 314 also has an emitter 318 having a housing 330 with a circular profile including the same circular dimensions. During installation, a user may first secure the receiver 317 to the upper left corner of the outward side of the glass sheet. The user then advances to the indoor side of the glass sheet and positions the emitter 318 such that the edge of the housing 330 of the emitter 318 matches the edge of the housing 332 of the receiver 317. Or the user may first secure the transmitter 318 to the glass sheet and then proceed to secure the receiver 317 to the other side of the glass sheet.

Fig. 13 is a schematic diagram showing an alternative embodiment of a positioning system of a power transmission system according to the utility model. In this embodiment, the receiver unit 416 also has a receiver 417 with a housing 432 having a circular profile 435 without any protrusions. The emitter unit 414 likewise has an emitter 418 with a housing 430 which also has a circular contour 431, but is slightly smaller in size. During installation, a user may first secure receiver 417 to the upper left corner of the glass sheet. The user then advances to the other side of the glass sheet and positions the transmitter 418 such that the edge of the housing 430 of the transmitter 418 rests within the edge of the housing 432 of the receiver 417. The positioning system according to this embodiment of the utility model is configured such that a viable positioning system for alignment purposes can still be constructed as long as the transmitter 418 stays within the edge of the receiver 417.

It is to be understood that certain features of the utility model, which are, for clarity, described in the context of separate embodiments, may be provided in combination in a single embodiment, and that the various features of the utility model described in the context of separate embodiments may be provided separately or in any suitable subcombination for clarity. It should be noted that certain features of the embodiments are illustrated by way of non-limiting example. Furthermore, those skilled in the art will recognize the prior art that has not been explained above for the sake of brevity.

Claims (20)

1. A system for wireless power transfer from one side of a transparent or translucent panel to an opposite side of the panel, comprising:

A transmitter unit mountable on said one side of said panel, wherein said transmitter unit comprises a primary coil for receiving an alternating current such that said primary coil emits a magnetic field, and

A receiver unit mountable on the opposite side of the panel, wherein the receiver unit comprises a secondary coil that generates an alternating current when subjected to the magnetic field from the primary coil,

Wherein:

The transmitter unit is provided with a first cable, one end of which is connectable to an electrical outlet, so as to receive alternating current from the electrical outlet,

The receiver unit includes a second converter for converting the alternating current generated by the secondary coil into direct current for supplying to an electric appliance mountable or installed in the vicinity of the receiver unit, and

Wherein:

The system comprises a positioning system provided with guide means on the transmitter unit or the receiver unit and a locator on the other respective unit, whereby when the system is installed by a user, the user can use the locator to check the position of the guide means on the other side of the panel and to align the transmitter unit and the receiver unit such that the secondary coil is maximally exposed to the magnetic field.

2. The system for wireless power transfer of claim 1, wherein the panel is planar and non-metallic and/or has a thickness of up to 40mm, 30mm, or 20mm.

3. The system for wireless power transmission according to claim 1, comprising a transformer for reducing a voltage of the alternating current of 110V to 240V inputted from the power outlet to 5V to 24V, thereby generating a voltage-reduced alternating current to be supplied to the primary coil, wherein the transformer can be located at the one end of the cable.

4. The system for wireless power transfer of claim 3, comprising a first converter for raising the frequency of the alternating current input from the power outlet from 50Hz to 60Hz to 50kHz to 300kHz, thereby producing a frequency-raised current.

5. The system for wireless power transfer of claim 1, comprising a controller that limits the output voltage and output current of the transmitter unit to the primary coil to 24V and 1000mA, respectively.

6. The system for wireless power transfer of claim 5, wherein the controller is configured to allow bi-directional communication between the transmitter unit and the receiver unit for controlling a predetermined maximum magnetic field output by the primary coil.

7. The system for wireless power transfer of claim 1, wherein the guide is a marking on the receiver unit secured to one side of the panel and the locator is an opening provided on the transmitter unit, whereby matching the opening to the marking allows the transmitter unit and the receiver unit to be aligned.

8. The system for wireless power transfer of claim 7, wherein the opening is disposed in a center of the transmitter unit surrounded by the primary coil and the marker is disposed in a center of the receiver unit surrounded by the secondary coil.

9. The system for wireless power transfer of claim 1, wherein the guide is a first protrusion extending from the receiver unit and the locator is a second protrusion extending from the transmitter unit, and wherein the first protrusion and the second protrusion have the same profile, thereby mating the first protrusion with the second protrusion allowing the transmitter unit and the receiver unit to be aligned.

10. The system for wireless power transfer of claim 1, wherein the guide is a marker defining a shape disposed on the transmitter unit and the locator is a boundary defining the receiver unit of the same shape.

11. The system for wireless power transfer of claim 1, wherein the steering device is a boundary of the transmitter unit defining a contour and the locator is a boundary of the receiver defining the same contour.

12. The system for wireless power transfer of claim 1, wherein the steering device is a boundary of the receiver unit defining a first geometry and the locator is a boundary of the transmitter unit defining a second geometry that is smaller than the first geometry.

13. An appliance system comprising the system for wireless power transmission according to claim 1 and an appliance, wherein the appliance is selected from the group consisting of an outdoor camera, a security light, or an illumination light.

14. A system for wireless power transfer from one side of a non-metallic panel to an opposite side of the panel, comprising or wherein:

A transformer for reducing the voltage of 110V to 240V alternating current inputted from a power outlet of a house to 5V to 24V, thereby generating reduced voltage alternating current,

A transmitter unit mountable on said one side of said panel, wherein said transmitter unit is provided with a first transducer for raising the frequency of said voltage from 50Hz to 60Hz to 50kHz to 300kHz, thereby generating a current with a raised frequency;

the transmitter unit is provided with a primary coil for receiving a voltage of 5V down to 24V and a frequency of 50kHz up to 300kHz of alternating current, thereby generating a magnetic field;

A receiver unit mountable on the opposite side of the panel, wherein the receiver unit comprises a secondary coil that generates an alternating current when subjected to the magnetic field,

A second converter for converting the alternating current generated in the secondary coil into direct current to be supplied to an electric appliance mountable or installed in the vicinity of the receiver unit, and

In use, the transmitter unit and the receiver unit are separated by the panel, which has a thickness or gap of up to 40mm, 30mm or 20mm.

15. The system for wireless power transfer of claim 14, comprising a controller that limits an output voltage and an output current of the transmitter unit to 24V and 1000mA, respectively, wherein the controller is configured to allow bi-directional communication between the transmitter unit and the receiver unit for controlling a predetermined maximum magnetic field output by the primary coil, and wherein the receiver unit is configured to output a voltage of up to 24V.

16. The system for wireless power transfer of claim 14, wherein:

The system comprising a positioning system provided with guiding means on the transmitter unit or the receiver unit and a positioner on the other respective unit, whereby when the system is installed by a user, the user can use the positioner to check the position of the guiding means on the panel and position and align the transmitter unit and the receiver unit, to maximize the exposure of the receiver unit to the magnetic field,

The guide means is a marking on the receiver unit fixed to one side of the panel, the locator is an opening provided on the transmitter unit, whereby matching the opening with the marking allows the transmitter unit and the receiver unit to be aligned, and

The opening is disposed at a center of the transmitter unit surrounded by the primary coil, and the marker is disposed at a center of the receiver unit surrounded by the secondary coil.

17. The system for wireless power transfer of claim 16, wherein the guide is a first protrusion extending from the receiver unit and the locator is a second protrusion extending from the transmitter unit, and wherein the first protrusion and the second protrusion have the same profile.

18. The system for wireless power transfer of claim 16, wherein the guide is a marker defining a shape disposed on the transmitter unit and the locator is a boundary defining the receiver unit of the same shape.

19. The system for wireless power transfer of claim 16, wherein the steering device is a boundary of the transmitter unit defining a profile and the locator is a boundary of the receiver defining the same profile.

20. The system for wireless power transfer of claim 16, wherein the steering device is a boundary of the receiver unit defining a first geometry and the locator is a boundary of the transmitter unit defining a second geometry that is smaller than the first geometry.