JP3158938U - Inductive charging system that can automatically start the charging process - Google Patents

Abstract

An inductive charging system for automatically starting a charging process according to the intensity of a power signal converted by an inductive signal is provided.
And a drive circuit that is electrically connected to the connection interface and the first electromagnetic induction unit, and that drives the first electromagnetic induction unit to generate an induction signal with electric power from the connection interface. The charging device senses an induction signal from the first electromagnetic induction unit, and is electrically connected to the second electromagnetic induction unit that converts the sensitive induction signal into a power signal, and the second electromagnetic induction unit. A detection circuit for detecting the intensity of the power signal, a power management module for storing a power signal transmitted from the second electromagnetic induction unit, a second electromagnetic induction unit, a detection circuit, and an electrical connection to the power management module And a controller that controls the second electromagnetic induction unit so as to transmit or not transmit the power signal to the power management module according to the detection result of the detection circuit.
[Selection] Figure 1

Description

  The present invention relates to an inductive charging system, and more particularly to an inductive charging system that automatically starts a charging process according to the strength of a power signal converted by an inductive signal.

  With the development of technology, electronic products that support people's daily lives are commonplace. An automatic cleaning robot is an example of an electronic product. Robot charging methods are generally divided into contact charging and non-contact charging. The contactless charging robot has a feeding end and a charging end. The charging end is guided by a magnetic flux change of the magnetic induction signal by the feeding end to generate a corresponding magnetic induction signal. The charging end converts the magnetic induction signal into a power signal. Convert to perform contactless charging. However, the induction strength of the magnetic induction signal is rapidly attenuated by increasing the distance between the feeding end and the charging end. In other words, the power transmission efficiency of contactless charging is significantly reduced by increasing the distance between the feeding end and the charging end. Therefore, in order to detect a change in the distance between the feeding end and the charging end and to drive the charging end so as to fall within the allowable feeding range of the feeding end, an optical is provided at each of the feeding end and the charging end of the non-contact charging robot. It is necessary to install a detection element such as a detection element. Therefore, the contactless charging robot is expensive and has poor power transmission efficiency.

  For these reasons, most current robots use contact charging. In order to acquire electric power, the contact-type charging robot electrically connects the power transmission element directly to the external power feeding device. Although such a power feeding method has high power transmission efficiency, the positioning of the power transmission element of the robot must be precise in order to connect to the external power feeding device, and its allowable error range is extremely small and inconvenient. Further, in the contact-type charging, at least one conductive contact must be provided at each of the power feeding end and the charging end in order to transmit a current when the power feeding end and the charging end are in contact with each other. Therefore, contact-type charging tends to cause accidents such as leakage and short circuit due to the conductive contact exposed to the outside. If the conductive contact at the charging end does not contact the conductive contact at the feeding end accurately, the charging end is required from the feeding end. Power cannot be acquired effectively. Therefore, the design of a charging system that combines the convenience of non-contact charging and the high power transmission efficiency of contact charging is an important issue in power transmission technology.

  In order to solve the above-described problems, an object of the present invention is to provide an inductive charging system that automatically starts a charging process according to the strength of a power signal converted by an inductive signal.

  The present invention discloses an inductive charging system that automatically starts a charging process according to the strength of a power signal converted from an inductive signal. The inductive charging system includes a power feeding device and a charging device. The power feeding device is electrically connected to a power source having a first voltage level, receives a power having a first voltage level from the power source, a first electromagnetic induction unit that transmits an induction signal, a connection interface, and a first A drive circuit that is electrically connected to the electromagnetic induction unit and that drives the first electromagnetic induction unit to generate an induction signal with electric power from the connection interface. The charging device senses an induction signal from the first electromagnetic induction unit, and is electrically connected to the second electromagnetic induction unit that converts the sensitive induction signal into a power signal, and the second electromagnetic induction unit. A detection circuit for detecting the intensity of the power signal, a power management module for storing a power signal transmitted from the second electromagnetic induction unit, a second electromagnetic induction unit, a detection circuit, and an electrical connection to the power management module And a controller that controls the second electromagnetic induction unit so as to transmit or not transmit the power signal to the power management module according to the detection result of the detection circuit.

1 is a block diagram of an inductive charging system according to a preferred embodiment of the present invention. It is explanatory drawing showing the 1st electromagnetic induction unit and the 2nd electromagnetic induction unit in the charge condition by the preferable Example of this invention. It is explanatory drawing showing the state where the distance of the two contact ends of the 2nd electromagnetic induction unit by the preferable Example of this invention and the two contact ends of the 1st electromagnetic induction unit is larger than predetermined distance. It is explanatory drawing showing the state where the distance of the two contact ends of the 2nd electromagnetic induction unit by the preferable Example of this invention and the two contact ends of the 1st electromagnetic induction unit is smaller than predetermined distance. It is explanatory drawing showing the state which two contact ends of the 2nd electromagnetic induction unit by the preferable Example of this invention contacted two contact ends of the 1st electromagnetic induction unit completely. It is a change curve figure showing the relative relationship between the intensity | strength change of the induction | guidance | derivation signal sensed by the 2nd electromagnetic induction unit by the preferable Example of this invention, and the position change of a 2nd electromagnetic induction unit. FIG. 7 is an explanatory diagram showing a slope of a change curve according to a preferred embodiment of the present invention shown in FIG. 6. 3 is a flowchart of a method for an inductive charging system according to a preferred embodiment of the present invention to automatically activate a charging process based on the strength of a power signal converted from a dielectric signal.

  Please refer to FIG. FIG. 1 is a block diagram of an inductive charging system 10 according to a preferred embodiment of the present invention. Inductive charging system 10 includes a power feeding device 12 and a charging device 14. The power feeding device 12 is, for example, a charging stand, and the charging device 14 is, for example, a robot. The robot moves to the charging stunt when the battery is not charged enough to receive the charge, and automatically adjusts the position so that the conductive contact of the robot is accurately positioned to the conductive contact of the charging stunt. Detailed arrangement of system elements will be described later. The power feeding device 12 includes a connection interface 16 that is electrically connected to a power source 18 having a first voltage level V1. The connection interface 16 is used to receive power from the power source 18 having a first voltage level V1. The connection interface 16 is, for example, a power plug, and the power source 18 is, for example, a fixed outlet provided on a wall, and supplies AC power of 110V to 220V. Therefore, if the user inserts the power plug into the fixed outlet, the power feeding device 12 can receive AC power having the first voltage level V <b> 1 from the power source 18 through the connection interface 16. The power feeding device 12 further includes a first electromagnetic induction unit 20 that transmits an induction signal, a connection interface 16, and a drive circuit 22 that is electrically connected to the first electromagnetic induction unit 20. The first electromagnetic induction unit 20 includes a first iron core 201 and a first induction coil 203 that covers the first iron core 201. The first iron core 201 is a metal conductor that cannot be easily magnetized, such as pig iron, and the drive circuit 22 drives the electric power from the connection interface 16 so as to pass through the first induction coil 203 of the first electromagnetic induction unit 20, An induction signal such as a magnetic induction signal is transmitted to the first iron core 201 around which the first induction coil 203 is wound.

  The charging device 14 includes a second electromagnetic induction unit 24 that senses an induction signal from the first electromagnetic induction unit 20 and converts the sensitive induction signal into a power signal. The second electromagnetic induction unit 24 includes a second iron core 241 and a second induction coil 243 that covers the second iron core 241. The second iron core 241 is a metal conductor such as pig iron that cannot be easily magnetized. Please refer to FIG. FIG. 2 is an explanatory diagram showing the first electromagnetic induction unit 20 and the second electromagnetic induction unit 24 in a charged state according to a preferred embodiment of the present invention. When the first electromagnetic induction unit 20 is driven such that the drive circuit 22 of the power feeding device 12 transmits an induction signal with AC power from the connection interface 16, the induction signal from the first electromagnetic induction unit 20 indicates the magnitude and direction of the AC power. The magnetic flux change is generated in accordance with the periodic change of. The second electromagnetic induction unit 24 converts the induction signal into a power signal by changing the magnetic flux of the induction signal, and this power signal is also AC power. In the preferred embodiment of the present invention, since the first coil turns of the first induction coil 203 is larger than the second coil turns of the second induction coil 243, the second induction coil 243 sends an induction signal less than the first voltage level V1. It can be converted into a power signal having two voltage levels V2. In other words, the second electromagnetic induction unit 24 has a function of reducing the voltage. However, the relative number of the first coil turns of the first induction coil 203 is not limited to the above, but can be determined according to the design.

  The charging device 14 further includes a detection circuit 26 that is electrically connected to the second electromagnetic induction unit 24. The detection circuit 26 is used to detect the strength of the power signal by the second electromagnetic induction unit 24, for example, the voltage strength of the power signal. The strength of the power signal is directly proportional to the strength of the induction signal. The charging device 14 further includes a power management module 28, a second electromagnetic induction unit 24, a detection circuit 26, and a controller 30 that is electrically connected to the power management module 28. The controller 30 controls transmission of the power signal from the second electromagnetic induction unit 24 to the power management module 28 based on the detection result of the detection circuit, and the power management module 28 stores the power signal from the second electromagnetic induction unit 24. enable. In other words, the inductive charging system 10 according to the present invention detects the strength of the power signal by the detection circuit 26 and, based on this, transmits the power signal from the second electromagnetic induction unit 24 to the power management module 28 (charging process). to decide. Accordingly, the charging device 14 not only performs the inductive charging process using the power signal converted from the induction signal of the first electromagnetic induction unit 20 by the second electromagnetic induction unit 24 but also detects the induction signal by the detection circuit 26. The intensity can be detected to determine the activation of the inductive charging process.

  The charging device 14 further includes a signal processing circuit 32 that is electrically connected to the second electromagnetic induction unit 24 and the power management module 28. The power signal from the second electromagnetic induction unit 24 is AC power, and the charging device 14 rectifies the power signal from the second electromagnetic induction unit 24 by the signal processing circuit 32 to obtain DC power. Further, the signal processing circuit 32 filters the power signal of the second electromagnetic induction unit 24 and transmits the filtered power signal to the power management module 28. In other words, the signal processing circuit 32 is a rectification charging circuit having a filtering function. However, the signal processing function of the signal processing circuit 32 is not limited to the above, and can be determined according to demand.

  The charging device 14 further includes a moving mechanism 34 that is electrically connected to the controller 30. Based on the detection result of the detection circuit 26, the controller 30 controls the moving mechanism 34 so as to move the charging device 14, and the relative relationship between the first electromagnetic induction unit 20 of the power feeding device 12 and the second electromagnetic induction unit 24 of the charging device 14. Adjust the distance. Please refer to FIG. 3 to FIG. FIG. 3 is an explanatory diagram showing a state in which the distance between the two contact ends 245 of the second electromagnetic induction unit 24 and the two contact ends 205 of the first electromagnetic induction unit 20 is greater than a predetermined distance according to a preferred embodiment of the present invention. FIG. 4 is an explanatory view showing a state in which the distance between the two contact ends 245 of the second electromagnetic induction unit 24 and the two contact ends 205 of the first electromagnetic induction unit 20 is smaller than a predetermined distance according to a preferred embodiment of the present invention. FIG. 5 is an explanatory diagram illustrating a state in which the two contact ends 245 of the second electromagnetic induction unit 24 are completely in contact with the two contact ends 205 of the first electromagnetic induction unit 20 according to a preferred embodiment of the present invention. As shown in FIG. 3, the second electromagnetic induction unit detected by the detection circuit 26 when the distance between the first electromagnetic induction unit 20 of the power feeding device 12 and the second electromagnetic induction unit 24 of the charging device 14 is greater than a predetermined distance. Since the strength of the power signal 24 is smaller than the predetermined strength, the second electromagnetic induction unit 24 cannot effectively sense the induction signal from the first electromagnetic induction unit 20. Therefore, the controller 30 of the charging device 14 controls the second electromagnetic induction unit 24 so as not to transmit the power signal to the power management module 28. In this case, the controller 30 of the charging device 14 controls the moving mechanism 34 to move the position of the charging device 14 according to the intensity change of the induction signal sensed by the second electromagnetic induction unit 24, and The second electromagnetic induction unit 24 of the charging device 14 is moved to the first electromagnetic induction unit 20 along the + X direction so as to fall within the effective sensitivity range of the induction signal by the electromagnetic induction unit 20. As shown in FIG. 4, the second electromagnetic induction unit 24 is within the effective sensitivity range of the first electromagnetic induction unit 20 along the + X direction. The two contact ends 245 of the second electromagnetic induction unit 24 are not yet completely in contact with the two contact ends 205 of the first electromagnetic induction unit 20. For example, the contact end 245 is partially in contact with the contact end 205 or is in contact with the contact end 205 with an inclination angle. Nevertheless, the second electromagnetic induction unit 24 can sense an induction signal having sufficient strength from the first electromagnetic induction unit 20. In this case, the rotation angle of the charging device 14 can be finely adjusted as shown in FIG. In order to achieve an optimum power transmission effect, the moving mechanism 34 is configured to detect the detection circuit 26 until the two contact ends 245 of the second electromagnetic induction unit 24 and the two contact ends 205 of the first electromagnetic induction unit 20 are completely in contact with each other. The position of the charging device 14 can be adjusted continuously according to the detection result.

  As shown in FIGS. 4 and 5, the second electromagnetic induction unit 24 senses an induction signal having a sufficient strength, and the detection circuit 26 detects that the power signal strength of the second electromagnetic induction unit 24 is greater than a predetermined strength. In this case, since the distance between the first electromagnetic induction unit 20 of the power feeding device 12 and the second electromagnetic induction unit 24 of the charging device 14 is smaller than the predetermined distance, the second electromagnetic induction unit 24 is the first electromagnetic induction unit 20. The induction signal can be effectively sensed and converted to a power signal having sufficient strength. In this case, the controller 30 of the charging device 14 controls the second electromagnetic induction unit 24 to transmit a power signal converted from the induction signal to the power management module 28 in order to perform charging. In other words, the charging device 14 can perform the charging process in a state where it is positioned so as to substantially overlap the power feeding device 12 as shown in FIG. 4 or in a state where it is positioned so as to overlap the power feeding device 12 as shown in FIG. Since it can be executed, the convenience of use is greatly improved. After the charging process is completed by the power management module 28 of the charging device 14, the moving mechanism 34 feeds the charging device 14 along the −X direction (or any other direction) in order to perform subsequent operations. The device 12 is moved outside the power supply range.

  Please refer to FIG. 6 and FIG. FIG. 6 is a change curve diagram showing the relative relationship between the intensity change of the induction signal sensed by the second electromagnetic induction unit 24 and the position change of the second electromagnetic induction unit 24 according to a preferred embodiment of the present invention, and FIG. FIG. 6 is an explanatory diagram showing the slope of a change curve according to a preferred embodiment of the present invention shown in FIG. When the controller 30 of the charging device 14 selects a predetermined direction (+ X direction) and controls the moving mechanism 34 to move along the predetermined direction (+ X direction), the induction sensitized by the second electromagnetic induction unit 24 The intensity of the signal varies depending on the position of the second electromagnetic induction unit 24, that is, varies depending on the distance between the second electromagnetic induction unit 24 and the first electromagnetic induction unit 20. For example, as shown in FIG. 6, when the second electromagnetic induction unit 24 is at the position P0 (position shown in FIG. 3), the intensity of the induction signal sensed by the second electromagnetic induction unit 24 is 10, When the electromagnetic induction unit 24 is in the position P1 (position shown in FIG. 4), the intensity of the induction signal sensed by the second electromagnetic induction unit 24 is 11, and the second electromagnetic induction unit 24 is in the position P2 (in FIG. 5). The intensity of the induction signal sensed by the second electromagnetic induction unit 24 is 12. Accordingly, the second electromagnetic induction unit 24 moves along a predetermined direction (+ X direction), moves one after another from the position P0 → P1 → P2, approaches the first electromagnetic induction unit 20, and the second electromagnetic induction unit. The intensity of the induction signal sensed by 24 is also increased from 10 → 11 → 12 accordingly. In this case, as shown in FIG. 7, the slope of the change curve of the relative relationship between the intensity change of the induction signal sensed by the second electromagnetic induction unit 24 and the position change of the second electromagnetic induction unit 24 is positive. Therefore, the controller 30 can determine that the charging device 14 moves to the power feeding device 12 with this positive inclination, and can control the moving mechanism 34 so as to continue moving forward. On the other hand, when the second electromagnetic induction unit 24 moves from the position P2 to P3, the intensity of the induction signal sensed by the second electromagnetic induction unit 24 becomes 12 to 13, and the controller 30 has a negative slope of the change curve. Thus, it can be determined that the charging device 14 moves in a direction away from the power supply device 12.

  When the inclination obtained by the calculation of the controller 30 changes from positive to negative (region indicated by the broken lines in FIGS. 6 and 7), the controller 30 causes the second electromagnetic induction unit 24 to change to the first electromagnetic induction unit due to the change in inclination. It is determined that the position is closest to 20, and the moving mechanism 34 is stopped. In this case, if it is detected by the detection circuit 26 that the power signal strength of the second electromagnetic induction unit 24 is greater than the predetermined strength, it is found that the charging device 14 is located in the optimum power feeding range of the power feeding device 12, Inductive charging system 10 initiates the charging process. On the other hand, if the detection circuit 26 detects that the power signal strength of the second electromagnetic induction unit 24 is smaller than the predetermined strength, the charging device 14 may enter the power feeding range of the power feeding device 12 in the wrong direction. As a result, the controller 30 restarts the moving mechanism 34 and adjusts the moving direction of the charging device 14 so that the charging device 14 falls within the optimum power feeding range of the power feeding device 12.

  The power feeding device 12 and the charging device 14 can be of a contact type charging method. That is, when the second electromagnetic induction unit 24 transmits a power signal to the power management module 28, the two contact ends 205 of the first electromagnetic induction unit 20 are brought into contact with the two contact ends 245 of the second electromagnetic induction unit 24. This realizes better power transmission efficiency. Or you may make the electric power feeder 12 and the charging device 14 into a non-contact-type charging system. That is, when the second electromagnetic induction unit 24 transmits a power signal to the power management module 28, the two contact ends 205 of the first electromagnetic induction unit 20 are brought into contact with the two contact ends 245 of the second electromagnetic induction unit 24. If the second electromagnetic induction unit 24 moves within the effective sensitivity range of the dielectric signal of the first electromagnetic induction unit 20, the charging process is started. Contact charging has high charging efficiency, and non-contact charging is convenient. Therefore, the inductive charging system 10 according to the present invention has the advantages of contact charging and non-contact charging.

  Please refer to FIG. FIG. 8 is a flowchart of a method by which the inductive charging system 10 according to a preferred embodiment of the present invention automatically starts the charging process based on the strength of the power signal converted from the dielectric signal. The method includes the following steps.

Step 100: The connection interface 16 of the power feeder 12 receives power having a first voltage level V1 from the power source 18.

Step 102: The drive circuit 22 of the power feeding apparatus 12 drives the first electromagnetic induction unit 20 of the power feeding apparatus 12 with the electric power from the connection interface 16 so as to transmit an induction signal.

Step 104: The second electromagnetic induction unit 24 of the charging device 14 is sensitive to the induction signal from the first electromagnetic induction unit 20.

Step 106: The second electromagnetic induction unit 24 converts the induction signal into a power signal having a second voltage level V2 that is less than the first voltage level V1.

Step 108: The detection circuit 26 of the charging device 14 detects whether the strength of the power signal of the second electromagnetic induction unit 24 is greater than a predetermined strength. If so, go to Step 110; otherwise go to Step 114.

Step 110: The controller 30 of the charging device 14 controls the second electromagnetic induction unit 24 so as not to transmit the power signal to the power management module 28.

Step 112: The controller 30 of the charging device 14 controls the moving mechanism 34 so as to move the position of the charging device 14 according to the detection result of the detection circuit 26, and the first electromagnetic induction unit 20 and the charging device 14 of the power feeding device 12 are controlled. The relative distance from the second electromagnetic induction unit 24 is adjusted. Return to step.

Step 114: The signal processing circuit 32 of the charging device 14 performs signal processing such as rectification and filtering on the power signal.

Step 116: The controller 30 of the charging device 14 controls the second electromagnetic induction unit 24 so as to transmit the power signal subjected to the signal processing to the power management module 28.

Step 118: The power management module 28 stores the power signal subjected to signal processing.

Proceed to step 120.

Step 120: End.

  The above method will be described in detail. First, the user connects the connection interface 16 of the power supply apparatus 12 to the power source 18 and receives power having the first voltage level V <b> 1 from the power source 18. The power source 18 is an external power source, for example, and the power from the power source 18 is AC power of 110V to 220V, for example. After the power feeding device 12 acquires power from the power source 18 via the connection interface 16, the drive circuit 22 of the power feeding device 12 drives the first electromagnetic induction unit 20 of the power feeding device 12 with the power so as to transmit an induction signal. To do. Since the first electromagnetic induction unit 20 includes the first iron core 201 and the first induction coil 203, the induction signal is a magnetic induction signal having a magnetic flux change, and the magnetic flux change of the magnetic induction signal is the magnitude and direction of the AC power from the power source 18. It changes according to the periodicity of. When the first electromagnetic induction unit 20 transmits an induction signal, the second electromagnetic induction unit 24 of the charging device 14 is sensitive to the induction signal from the first electromagnetic induction unit 20. The second electromagnetic induction unit 24 includes a second iron core 241 and a second induction coil 243. Since the second coil turn of the second induction coil 243 is smaller than the first coil turn of the first induction coil 203, the second electromagnetic induction unit 24 converts the induction signal responsive to the electromagnetic induction effect into a power signal having a second voltage level V2 smaller than the first voltage level V1. The ratio of the first voltage level V1 and the second voltage level V2 is directly proportional to the ratio of the first coil turns of the first induction coil 203 and the second coil turns of the second induction coil 243.

  Thereafter, the detection circuit 26 of the charging device 14 detects whether the strength of the power signal (for example, the voltage strength of the power signal) of the second electromagnetic induction unit 24 is greater than a predetermined strength. When the intensity of the power signal detected by the detection circuit 26 is smaller than the predetermined intensity, the distance between the first electromagnetic induction unit 20 of the power feeding device 12 and the second electromagnetic induction unit 24 of the charging device 14 is long, so the second The electromagnetic induction unit 24 cannot effectively sense the induction signal of the first electromagnetic induction unit 20. In this case, the controller 30 of the charging device 14 controls the second electromagnetic induction unit 24 so as not to transmit the power signal to the power management module 28. At the same time, the controller 30 of the charging device 14 adjusts the slope of the change curve representing the relative relationship between the intensity change of the power signal and the intensity change of the induction signal detected by the detection circuit 26 and the position change of the second electromagnetic induction unit 24. Based on this, the moving mechanism 34 is controlled so that the position of the charging device 14 is moved so as to approach the power supply device 12 and enter the effective signal intensity range of the induction signal by the first electromagnetic induction unit 20. It should be noted that since the induction signal by the first electromagnetic induction unit 20 is a magnetic induction signal, the second electromagnetic induction unit 24 generates a magnetic induction signal corresponding thereto. Therefore, when the charging device 14 approaches the power feeding device 12, an auxiliary magnetic attractive force is generated between the first electromagnetic induction unit 20 and the second electromagnetic induction unit 24, and the moving mechanism 34 uses this auxiliary magnetic attractive force. Thus, the charging device 14 can be moved to the power supply device 12 to achieve better power transmission efficiency.

When the charging device 14 enters the effective sensitivity range of the power supply device 12 and the detection circuit 26 detects that the strength of the power signal of the second electromagnetic induction unit 24 is greater than a predetermined strength, the second electromagnetic induction unit 24 is The controller 30 of the charging device 14 controls the second electromagnetic induction unit 24 to transmit the power signal to the power management module 28 when it is found that the effective signal intensity range of the induction signal by the electromagnetic induction unit 20 is within the range. . However, in order to obtain a better power signal, the signal processing circuit 32 of the charging device 14 rectifies the power signal from the second electromagnetic induction unit 24 before the controller 30 transmits the power signal to the power management module 28. After performing signal processing such as filtering, the power signal subjected to signal processing is transmitted to the power management module 28 and charged. The signal processing circuit 32 can be selected as an option. In other words, the charging device 14 can transmit the power signal to the power management module 28 under the control of the controller 30 without going through the processing process of the signal processing circuit 32. After the charging is completed, the controller 30 of the charging device 14 controls the second electromagnetic induction unit 24 so as not to transmit the power signal to the power management module 28. Therefore, the first electromagnetic induction unit 20 and the second electromagnetic induction unit 24 During this time, the auxiliary magnetic attractive force is weakened, and the moving mechanism 34 of the charging device 14 moves the charging device 14 in a direction away from the power supply device 12.
In summary, the two contact ends 205 of the first electromagnetic induction unit 20 and the two contact ends 245 of the second electromagnetic induction unit 24 form two magnetic poles, respectively. Inductive charging system 10 that uses magnetic poles as conductive contacts avoids accidents due to electric leakage and short circuits, and also has a waterproof effect. Further, according to the preferred embodiment of the present invention, the two contact ends 205 of the first electromagnetic induction unit 20 and the two contact ends 245 of the second electromagnetic induction unit 24 are in contact with each other, so that the charging of the inductive charging system 10 is performed. Efficiency can be optimized. However, when the two contact ends 205 of the first electromagnetic induction unit 20 and the two contact ends 245 of the second electromagnetic induction unit 24 are not completely in contact with each other, the second electromagnetic induction unit 24 is connected to the first electromagnetic induction unit 20. The second electromagnetic induction unit 24 senses the induction signal from the first electromagnetic induction unit 20 and converts the sensitive induction signal into a power signal to charge the power management module 28. can do. Therefore, the inductive charging system 10 that uses the magnetic pole as a transmission contact for the inductive signal feeds both magnetic poles of the charging device 14 even without positioning both magnetic poles of the charging device 14 so as to be exactly aligned with both magnetic poles of the power feeding device 12. Since charging can be performed only by entering the power supply allowable range of both magnetic poles of the device 12, the convenience of the inductive charging system 10 can be greatly improved.

  Compared to the conventional technology, the inductive charging system according to the present invention uses the magnetic pole as a transmission contact for the inductive signal. Do not short circuit. Further, the charging device cooperates with the moving mechanism so as to position the charging device within the allowable power supply range of the power supply device by detecting the intensity change of the magnetic induction signal by the detection circuit. The induction signal of the inductive charging system carries a power signal, and its intensity change is also useful for positioning the charging device, so that it is not necessary to provide a wireless positioning identification element separately. Therefore, the manufacturing cost and the space required for the internal elements of the charging device can be greatly reduced. Therefore, the inductive charging system according to the present invention improves power transmission efficiency without connecting with an actual power cable, and can solve both drawbacks at the same time while combining the advantages of contact-type charging and non-contact-type charging.

  The above is a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention. Accordingly, any modifications or changes that can be made by those skilled in the art, which are made within the spirit of the present invention and have an equivalent effect on the present invention, belong to the scope of the utility model registration claim of the present invention. Shall.

DESCRIPTION OF SYMBOLS 10 Inductive charging system 12 Power supply apparatus 14 Charging apparatus 16 Connection interface 18 Power supply 20 1st electromagnetic induction unit 22 Drive circuit 24 2nd electromagnetic induction unit 26 Detection circuit 28 Power management module 30 Controller 32 Signal processing circuit 34 Moving mechanism 201 1st Iron core 203 First induction coil 205 Contact end 241 Second iron core 243 Second induction coil 245 Contact end V1 First voltage level V2 Second voltage level

Claims (10)

An inductive charging system that automatically activates a charging process according to the intensity of a power signal converted from an inductive signal,
A connection interface electrically connected to a power source having a first voltage level and receiving power having the first voltage level from the power source;
A first electromagnetic induction unit for transmitting an induction signal;
A power feeding device including a drive circuit that is electrically connected to the connection interface and the first electromagnetic induction unit, and that drives the first electromagnetic induction unit to transmit the induction signal with electric power from the connection interface; ,
A second electromagnetic induction unit that senses the induction signal from the first electromagnetic induction unit and converts the sensitive induction signal into a power signal;
A detection circuit that is electrically connected to the second electromagnetic induction unit and detects the intensity of the power signal of the second electromagnetic induction unit;
A power management module for storing the power signal transmitted from the second electromagnetic induction unit;
The second electromagnetic induction unit, the detection circuit, and the power management module are electrically connected, and the power signal is transmitted or not transmitted to the power management module according to a detection result of the detection circuit. An inductive charging system including a charging device including a controller that controls the second electromagnetic induction unit.   When the detection circuit detects that the power signal of the second electromagnetic induction unit is less than a predetermined strength, the controller prevents the second electromagnetic induction unit from transmitting the power signal to the power management module. The inductive charging system according to claim 1, which is controlled.   When the detection circuit detects that the power signal of the second electromagnetic induction unit is greater than a predetermined strength, the controller causes the second electromagnetic induction unit to transmit the power signal to the power management module. The inductive charging system according to claim 1, which is controlled.   The two contact ends of the first electromagnetic induction unit are in contact with the two contact ends of the second electromagnetic induction unit when the second electromagnetic induction unit transmits the power signal to the power management module. The inductive charging system described in 1.   The two contact ends of the first electromagnetic induction unit do not contact the two contact ends of the second electromagnetic induction unit when the second electromagnetic induction unit transmits the power signal to the power management module. The inductive charging system described in 1.   The first electromagnetic induction unit includes a first iron core and a first induction coil that covers the first iron core, and transmits a magnetic induction signal. The second electromagnetic induction unit includes a second iron core and the second iron core. Including a second induction coil to be coated, sensitive to the magnetic induction signal transmitted from the first electromagnetic induction unit, wherein the first coil turn of the first induction coil is greater than the second coil turn of the second induction coil 2. The inductive charging system according to claim 1, whereby the second electromagnetic induction unit converts the responsive induction signal to the power signal having a second voltage level less than the first voltage level. The charging device further includes
A moving mechanism electrically connected to the controller; the controller controls the moving mechanism to move the position of the charging device according to a detection result of the detection circuit; The inductive charging system according to claim 1, wherein a relative distance between the induction unit and the second electromagnetic induction unit of the charging device is adjusted. The charging device further includes
A signal processing circuit electrically connected to the second electromagnetic induction unit and the power management module, rectifying the power signal of the second electromagnetic induction unit, and transmitting the rectified power signal to the power management module; The inductive charging system according to claim 1.   The inductive charging system according to claim 8, wherein the power signal of the second electromagnetic induction unit is AC power, and the signal processing circuit rectifies AC power into DC power. The charging device further includes
A signal processing circuit that is electrically connected to the second electromagnetic induction unit and the power management module, filters the power signal of the second electromagnetic induction unit, and transmits the filtered power signal to the power management module; The inductive charging system according to claim 1.

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