KR101237365B1 - Transformer Type Non-Contact Charging Device Having Hands-Free Function - Google Patents

Abstract

A transformer type contactless charging device having a hands free function is disclosed. The disclosed transformerless contactless charging device having a hands-free function includes a power input unit for converting general-use AC power into a DC voltage, outputting a sensor, a sensor unit for detecting a proximity of a secondary circuit, and outputting a signal, and a signal of the sensor unit. When input, the PWM control unit for generating and filtering a high frequency by PWM control to apply a high frequency AC voltage pulse to the primary coil, and the output of the power input unit is applied 1 to induce charging power by the AC voltage pulse of the high frequency A primary circuit having a secondary coil; A secondary coil spaced apart from the primary coil to generate an AC induced electromotive force pulse corresponding to the AC voltage pulse by inductive coupling with the primary coil, and AC / converting the AC voltage of the secondary coil to a DC voltage A secondary circuit having a DC converter and a connector unit converting the DC voltage of the AC / DC converter into a constant voltage for charging and connecting the battery to a battery charging terminal of the portable electronic device; And a wireless transmitter and receiver for wireless communication with the portable electronic device, a Bluetooth converter for converting an audio signal transmitted and received through the wireless transmitter and receiver into a signal according to a Bluetooth standard, and a digital signal output from the Bluetooth converter. A hands-free module including an audio control unit for converting an analog signal and outputting it through a speaker, or converting an analog signal input from a microphone into a digital signal and transmitting the digital signal to the Bluetooth conversion unit; Characterized in that it comprises a.

Description

Transformer Type Non-Contact Charging Device Having Hands-Free Function

The present invention relates to a transformerless contactless charging device having a hands-free function, and more particularly, a primary coil using a ferrite core, as well as a hands-free function for making voice calls or listening to music through a Bluetooth method. Transformer type with hands-free function that can generate high frequency magnetic field and charge the battery of portable electronic device through transformer method that transmits energy for charging to secondary coil using ferrite core through non-contact method through inductive coupling It relates to a contactless charging device.

Portable electronic devices such as mobile communication terminals including PDAs, PDAs, etc., are equipped with a battery having a rechargeable secondary battery cell to provide power. To charge such batteries, the AC power for home use is adjusted to an appropriate voltage. A separate charger is required to supply the battery.

Each of the charging device and the battery is provided with separate contact terminals to electrically connect the charging device and the battery by an operation of connecting the two contact terminals with each other.

However, if the contact terminal protrudes to the outside in this way, there is a problem that the appearance is not good and the contact terminal is contaminated with external foreign matter and the contact state is easily poor.

In addition, when the battery is inadvertently shorted or exposed to moisture, the charging energy may be easily lost.

In addition, when contacting or disconnecting the charging device and the battery, instantaneous discharge occurs due to different potential difference between the contact terminals on both sides, whereby there is a possibility that a fire due to heat generation may occur if foreign matter accumulates on both contact terminals. .

In order to solve the problem of the terminal supply method, a contactless charging device has been developed, such a contactless charging device is located on top of the primary coil of the contactless charging device, the portable terminal in which the battery to be charged is located Then, it is charged by the secondary coil inside the battery. That is, the secondary coil is charged with electricity induced from the induced electromotive force by the magnetic field generated by the primary coil. However, such a conventional contactless charging device can only charge electricity when there is a secondary coil inside the battery of the portable electronic device.

On the other hand, the conventional solid-state charging device can not be hands-free function other than the charging function, had the disadvantage of having to install a separate hands-free. In addition, although there is a configuration in which the hands-free function is added to the conventional charging device, it has the trouble of connecting the charging device and the portable electronic device with the hands-free function by wires (sound signal lines) one by one, and also by the wired connection. As a result, the beauty of the interior of the vehicle was disadvantageous.

The present invention was devised to solve the above-mentioned problems, and not only has a hands-free function for making a phone call or listening to music through Bluetooth, but also generates a high frequency magnetic field in the primary coil using a ferrite core. A transformerless contactless charging device having a hands-free function for charging a battery of a portable electronic device through a transformer method that transmits energy for charging to a secondary coil using a ferrite core through inductive coupling in a non-contact manner. will be.

In addition, by having a sensor for detecting the approach of the secondary circuit in the primary circuit of the present invention and a connector connected to the battery in the secondary circuit, it is possible to charge the battery regardless of the type of portable electronic device, It is an object of the present invention to provide a transformerless contactless charging device having a hands-free function that can simplify size and cost.

In addition, another object of the present invention is to provide a transformerless contactless charging device having a hands-free function capable of simultaneously charging a plurality of batteries while simplifying a circuit by controlling a plurality of primary coils in a PWM control unit.

Transformer-type solid-state charging device with a hands-free function of the present invention for achieving the above object is a power input unit for converting and outputting a general-use AC power to a DC voltage, and outputs a signal by sensing the approach of the secondary circuit Sensor unit, PWM control unit for generating a high frequency and filtering by applying a high frequency AC voltage pulse to the primary coil when the signal of the sensor unit is input, and the output of the power input unit is applied to the output of the high frequency AC A primary circuit having a primary coil for inducing charging power with a voltage pulse; A secondary coil spaced apart from the primary coil to generate an AC induced electromotive force pulse corresponding to the AC voltage pulse by inductive coupling with the primary coil, and AC / converting the AC voltage of the secondary coil to a DC voltage A secondary circuit having a DC converter and a connector unit converting the DC voltage of the AC / DC converter into a constant voltage for charging and connecting the battery to a battery charging terminal of the portable electronic device; And a wireless transmitter and receiver for wireless communication with the portable electronic device, a Bluetooth converter for converting an audio signal transmitted and received through the wireless transmitter and receiver into a signal according to a Bluetooth standard, and a digital signal output from the Bluetooth converter. A hands-free module including an audio control unit for converting an analog signal and outputting it through a speaker, or converting an analog signal input from a microphone into a digital signal and transmitting the digital signal to the Bluetooth conversion unit; Characterized in that it comprises a.

On the other hand, the present invention is a power input unit for converting and outputting a general commercial AC power to a DC voltage, a plurality of sensor units for outputting a signal by sensing a plurality of secondary circuit approach, respectively, any one or more of the plurality of sensor units When the signal of the sensor unit is input, a PWM control unit for generating and filtering a high frequency by PWM control to apply high frequency AC voltage pulse to the primary coil, and the output of the power input unit is applied to the charging power with the AC voltage pulse of the high frequency. Primary circuit having a plurality of primary coils for inducing; A plurality of secondary coils spaced apart from each of the primary coils to generate AC induced electromotive force pulses corresponding to the AC voltage pulses by inductive coupling with the primary coils, and one-to-one connection with the secondary coils AC / DC converter that converts the DC voltage into DC voltage, and is connected to the AC / DC converter one-to-one to convert the DC voltage of the AC / DC converter into a constant voltage necessary for charging and to connect the battery charging terminal of the portable electronic device. A secondary circuit having a portion; And a wireless transmitter and receiver for wireless communication with the portable electronic device, a Bluetooth converter for converting an audio signal transmitted and received through the wireless transmitter and receiver into a signal according to a Bluetooth standard, and a digital signal output from the Bluetooth converter. A hands-free module including an audio control unit for converting an analog signal and outputting it through a speaker, or converting an analog signal input from a microphone into a digital signal and transmitting the digital signal to the Bluetooth conversion unit, and a key input unit for inputting an operation signal to the Bluetooth conversion unit; Characterized in that it comprises a.

The primary circuit and the hands-free module are built into a charging unit body including a cylindrical portion and a flat portion extending perpendicularly to the longitudinal direction of the cylindrical portion from the center of the cylindrical portion, wherein the speaker is installed at one side of the cylindrical portion. The microphone may be installed at the other side of the cylindrical portion.

The primary coil may be formed by winding a wire in a ferrite core having a concentric shape, and the secondary coil may be positioned above the primary coil and may be formed by winding a wire in a ferrite core having a concentric circle.

The primary circuit is built into the main body of the charging device, the primary coil is mounted inside the main body of the mounting groove formed on the upper side, the secondary circuit is located on the upper part and spaced apart from the primary circuit and the secondary The circuit is positioned below the portable electronic device, and the secondary coil is mounted at a position corresponding to the primary coil, so that the secondary circuit may be mounted in the mounting groove of the charging apparatus main body when the battery is charged.

The PWM control unit includes a PWM IC for generating a high frequency by a signal input of the sensor unit, an amplifier configured to amplify a high frequency fine current generated by a MOSFET connected to an output terminal of the PWM IC, and the front of the primary coil. One end to one end and a series connected capacitors may be provided with a noise filter to remove the noise components included in the high frequency.

The secondary circuit may be provided with magnets as many as the number of secondary coils, and the sensor unit may be provided with a hall sensor corresponding to the magnets to generate an electromotive force by sensing a magnetic field of the magnet.

According to the present invention, it not only has a hands-free function for making a telephone call or listening to music, but also generates a high frequency magnetic field in the primary coil using the ferrite core and charges the secondary coil using the ferrite core through inductive coupling. Through the transformer method for transmitting energy for a non-contact method, the battery of the portable electronic device can be charged, thereby making it possible to make a phone call or listen to music in addition to charging the battery.

In addition, there is an effect that can make a phone call or listen to music through the Bluetooth method, without the need to connect by portable electronic devices and wired.

In addition, by having a sensor for detecting the approach of the battery in the primary circuit and a connector connected to the battery in the secondary circuit, it is possible to charge the battery regardless of the type of portable electronic device, and to simplify the circuit to Size and cost can be reduced.

In addition, according to the present invention, a plurality of primary coils may be PWM controlled by a PWM controller to simplify a circuit and simultaneously charge a plurality of batteries.

In addition, since the primary coil including the core and the winding wire, and the secondary coil including the core and the winding wire, heat generation can be extremely reduced and the charging power can be maximized as compared with the existing device.

1 is a block diagram of a transformer type solid state charging device having a hands free function according to an embodiment of the present invention;
FIG. 2 is a perspective view showing a state of use of a transformerless contactless charging device having a hands-free function shown in FIG.
3 is a side view taken along line III-III of FIG. 2,
4 is a block diagram of a transformer type solid state charging device having a hands free function according to another embodiment of the present invention;
5 is a circuit diagram of a sensor unit shown in FIG. 4;
6 is a circuit diagram of the PWM control unit shown in FIG. 4;
7 is a circuit diagram of the connector portion shown in FIG. 4;
8A to 8D are output waveform diagrams of respective parts shown in FIG. 4;

Hereinafter, with reference to the accompanying drawings, a transformer-type contactless charging device having a hands-free function according to an embodiment of the present invention will be described.

1 is a block diagram of a transformerless contactless charging device with a handsfree function according to an embodiment of the present invention, Figure 2 is a transformerless contactless charging device with a handsfree function shown in Figure 1 shown in FIG. 3 is a perspective view showing a state of use, and FIG. 3 is a side view taken along line III-III of FIG. 2.

As shown, the transformerless contactless charging device having a hands-free function includes a primary circuit 10 including a power input unit 11, a PWM control unit 13, a sensor unit 14, and a primary coil 17, A secondary circuit 20 consisting of a secondary coil 21, an AC / DC converter 22, a connector portion 24, a Bluetooth converting portion 31, a wireless transmitting and receiving portion 32, an audio control portion 33, A hands free module 30 including a key input unit 34, a speaker 35, and a microphone 36 is included.

In other words, the primary circuit 10 and the secondary circuit 20 are configured to charge a battery of a portable electronic device, and the hands-free module 30 communicates with the portable electronic device in a Bluetooth manner to make a phone call and listen to music. It is a structure for doing so.

First, the configuration of the primary circuit 10 and the secondary circuit 20 for charging the battery of the portable electronic device E (see FIG. 3) will be described in detail.

The power input unit 11 converts a general commercial AC power into a DC voltage applied to the primary circuit 10 (for example, DC 12V) and supplies the same to each component.

The sensor unit 14 detects the approach of the secondary circuit 20 connected to the battery and outputs a signal to the PWM controller 13.

The sensor unit 14 according to the present embodiment is formed of a hall sensor, and the magnet 25 is provided in the secondary circuit 20 connected to the battery, so that the secondary circuit 20 is primarily charged. When raised above the circuit 10, the Hall sensor generates electromotive force by the magnetic field of the magnet 25. However, the sensor unit 14 of the present invention may be configured of various sensors capable of detecting the approach of the secondary circuit 20 in addition to the hall sensor.

When the signal is input from the sensor unit 14, the PWM control unit 13 generates a high frequency (for example, 15 KHz) above a commercial frequency, and filters the noise included in the high frequency to filter the AC voltage pulse of the high frequency. Is applied to (17).

As shown in FIG. 3, the primary coil 17 is formed by winding a wire 19 around a concentric ferrite core 18.

As shown in FIG. 3, the secondary coil 21 is positioned above the primary coil 17 at regular intervals, and the wire 27 is wound around the concentric ferrite core 26. And magnetically coupled to generate an AC induced electromotive force pulse corresponding to the AC voltage pulse.

Explain in more detail. The primary coil 17 and the secondary coil 21 are magnetically coupled to each other by inductive coupling, which is produced by the primary coil 17 as it is juxtaposed on the primary coil 17. The magnetic field induces an induced current in the secondary coil 21.

That is, energy for charging is transferred in a non-contact manner by electromagnetic inductive coupling without an electrical contact point from the primary side to the secondary side.

The ferrite core 26 of the secondary coil 21 has the same concentricity and outer diameter as the ferrite core 18 of the primary coil 17, but has a thickness and a height greater than that of the ferrite core 18 of the primary coil 17. Thin and low

In this manner, the ferrite cores 18 and 26 are used as the primary coils 17 and the secondary coils 21, respectively, so that the frequency of the primary coils 17 is within several hundred KHz. Induction can reduce the size of the charging device as a whole.

The AC / DC converter 22 of the secondary circuit 20 rectifies and converts AC induction electromotive force output through the secondary coil 21 into a direct current, and the connector unit 24 is a battery of the portable electronic device E. The battery is charged by converting the voltage, which is connected to the charging terminal and converted into direct current by the AC / DC converter 22, into a constant constant voltage for charging the battery.

The connector part 24 is a part connected to the battery charging terminal of the portable electronic device E, and may be implemented in various forms suitable for the appearance and mechanical conditions of the portable electronic device E.

Meanwhile, as shown in FIG. 3, the primary coil 10 and the sensor unit 14 are embedded in the main body of the mounting groove 41 formed in the upper part of the main body 10 having the primary circuit 10 built into the charging device main body 40. Hall sensor constituting the is installed to face upward.

The secondary circuit 20 is positioned above a predetermined distance spaced apart from the primary circuit 10, and the secondary circuit 20 is connected to the portable electronic device E and the connector 24 so that the portable electronic device ( E) is mounted on the lower portion, the secondary coil 21 and the magnet 25 is installed at a position corresponding to the primary coil 17 and the sensor unit 14.

And, when the battery is charged, the secondary circuit 20 is mounted in the mounting groove 41 of the charging device body 40.

Referring to the operation of the contactless charging device of the above-described configuration, the general commercial AC power is converted to direct current through the power input unit 11, the output 12V is applied to each component including the primary coil 17. .

In this state, the connector unit 24 is connected to the battery charging terminal of the portable electronic device E. When the connector unit 24 is positioned on the primary circuit 10, the magnetic field of the magnet 25 provided in the secondary circuit 20 is transferred to the sensor unit. (14) recognizes and generates an electromotive force and applies a signal to the PWM control unit (13).

The PWM controller 13 generates high frequency, removes noise, and applies high frequency AC voltage pulses to the primary coil 17.

As the power is supplied to the primary coil 17 and the high frequency AC voltage pulse is applied, the secondary coil 21 positioned at an upper portion with a predetermined gap in the primary coil 17 corresponds to the high frequency AC voltage pulse. Generate an AC induced electromotive force pulse.

The AC induced electromotive force pulse is converted into direct current via the AC / DC converter 22, and charged by making a constant voltage necessary for charging in the connector unit 24 and supplying it to the battery.

Next, a description will be given of the configuration of the hands-free module 30 connected to the portable electronic device E (see FIG. 3) by using a Bluetooth method for making a voice call and listening to music.

1 to 3, the hands-free module 30 outputs an audio signal received from a paired electronic device (E, a mobile phone capable of Bluetooth communication including a smartphone) through a speaker 35, and a microphone. A voice signal input by the user 20 is transmitted to the portable electronic device E to perform a hands free function. The hands free module 30 may output the audio signal of the MP3 music file reproduced by the paired portable electronic device E through the speaker 35.

The Bluetooth converter 31 performs signal conversion according to the Bluetooth standard, and the wireless transmitter / receiver 32 performs wireless communication with a paired portable electronic device (E, a mobile phone including a smartphone).

The audio controller 33 converts the digital signal output from the Bluetooth converter 31 into an analog signal and outputs it through the speaker 35, and converts the analog signal input through the microphone 36 into a digital signal to convert the Bluetooth signal. Transfer to section 31.

As shown in FIG. 2, the key input unit 34 is provided with at least one operation button, and may include a call button for listening to a phone ring of the portable electronic device E and switching to a call state. When playing a music file, a play button for selecting a play file and a button for ending a call or music play may be provided.

The speaker 35 outputs an analog audio signal received from the audio control unit 33 so that the user can hear it, and the microphone 36 collects an analog voice signal of the user and transmits the analog audio signal to the audio control unit 33.

On the other hand, the hands-free module 30 is installed to be embedded in the charging device main body 40, as shown in Figure 2 and 3, in this case, the charging device main body 40, as shown in Figure 2, a cylindrical portion having a predetermined length ( 40a) and a flat plate portion 40b extending vertically in the longitudinal direction of the cylindrical portion 40a near the center of the cylindrical portion 40a, wherein the speaker 35 is installed at the right side of the cylindrical portion 40a. The microphone 36 is provided on the left side. As such, the speaker 35 and the microphone 36 are spaced apart at both ends of the cylindrical portion 40a, thereby minimizing the influence of the speaker 35 on the microphone 36 to reduce the degradation of the call quality due to noise. have.

Although not shown, the components that require power among the components of the hands free module 30 according to the present exemplary embodiment may be configured to receive power from the power input unit 11 of the primary circuit 10 or may be provided with a separate power unit. It may be.

On the other hand, the transformerless contactless charging device with a hands-free function of the present invention can be connected to the paired at least two portable electronic devices (E) with a Bluetooth function, the operation of the first portable electronic device (E) The other device can be configured to wait for connection.

In addition, even when playing a game installed in the portable electronic device (E), by configuring the audio signal generated on the game to the speaker 35 through the Bluetooth communication as described above, it is possible to enjoy a game full of excitement.

Hereinafter, a case of making a voice call through the hands free module 30 will be described.

First, the user's portable electronic device E, for example, a smart phone having a Bluetooth module is mounted on the flat plate 40b of the charging device body 40, so that the portable electronic device E is the hands free module 30. Approaching within a predetermined distance from the Bluetooth will automatically pair with each other according to the standard.

In this state, when the telephone ring of the portable electronic device E rings, the user presses the key input unit 34 to switch to the call state, and the other party's voice signal is output through the speaker 35, and the user's voice signal is input to the microphone 36. ) And is transmitted to the portable electronic device E to make a telephone call. In this case, when the other party's voice signal is received from the portable electronic device E by the wireless transmitter / receiver 32, the other party's voice signal is transmitted to the audio controller 33 via the Bluetooth converter 31, and the audio controller. Reference numeral 33 converts the voice signal of the other party from digital to analog form and then outputs it through the speaker 35. In addition, the voice signal of the user input to the microphone 36 is converted from the analog form to the digital form in the audio control unit 33, and then transmitted to the Bluetooth conversion unit 31, the portable electronic through the wireless transmission and reception unit 32 After being transmitted to the device E, it is transmitted to the mobile phone of the other party through the mobile communication network so that the other party can hear the user's voice.

In addition, the transformerless contactless charging device with a hands-free function of the present invention receives an audio signal of a music file played by a portable electronic device (E) such as a smart phone or an MP3 player equipped with a Bluetooth module by a Bluetooth method. It can output through the speaker 35.

In this case, when the portable electronic device E is paired with the hands-free module 30, when playing the music file of the portable electronic device E, the music file audio signal is received by the wireless transmitter / receiver 32, When the audio control unit 33 is transferred to the audio control unit 33 via the Bluetooth conversion unit 31, the audio control unit 33 converts the music file audio signal from digital to analog form and outputs the same through the speaker 35. You can listen to music.

As described above, the transformerless contactless charging device having the hands-free function of the present invention is wirelessly connected to a portable electronic device through a Bluetooth method to make a phone call or listen to music, as well as a primary using a ferrite core. The transformer can generate a high frequency magnetic field from a coil and inductively couple a secondary coil using a ferrite core to charge energy in a non-contact manner, thereby charging a battery of a portable electronic device.

FIG. 4 is a block diagram of a transformerless contactless charging device with a handsfree function according to another embodiment of the present invention, wherein the transformerless contactless charging device with a handsfree function when three batteries can be simultaneously charged. Is a block diagram of. Since the configuration of the hands free module 30 according to the present embodiment is the same as the hands free module 30 according to the embodiment of the present invention illustrated in FIG. 1, the description thereof will be omitted.

As shown, the configuration for performing the charging function is the power supply unit 11, PWM control unit 13, sensor unit 14 ': 14a, 14b, 14c, primary coil (17': 17a, 17b, 17c) Primary circuit 10 ', secondary coils 21': 21a, 21b, 21c, AC / DC converters 22 ': 22a, 22b, 22c, and connector portions 24': 24a, 24b. And a secondary circuit 20 'consisting of 24c.

The power input unit 11 converts a general commercial AC power into a DC voltage (for example, DC 12V) applied to the primary circuit 10 'and supplies the same to each component.

Each sensor unit 14a, 14b, 14c senses the approach of the secondary circuit 20 'for charging and outputs a signal to the PWM control unit 13.

In particular, in the present invention, the sensor units 14a, 14b, 14c generate electromotive force by the magnetic field of the magnet 25, whereby the signal outputs the signal to the PWM control unit 13.

Sensor unit 14a, 14b, 14c of the present invention is made of a hall sensor (hall sensor), the secondary circuit 20 'connected to the battery is provided with a magnet 25 to the secondary circuit 20 for charging Is raised above the primary circuit 10 ', the electromotive force generated by the magnetic field of the magnet 25 in the Hall sensor. However, the sensor unit 14 of the present invention may be configured of various sensors capable of detecting the approach of the secondary circuit 20 'in addition to the hall sensor.

The PWM control unit 13 generates a high frequency (for example, 15 KHz) above a commercial frequency, filters noise included in the high frequency, and applies high frequency AC voltage pulses to the primary coils 17a, 17b, and 17c, respectively.

Each of the primary coils 17a, 17b, and 17c is formed by winding a wire 19 on a ferrite core 18 having a concentric shape, like the primary coil 17 of one embodiment.

The secondary coils 21a, 21b, and 21c corresponding to the primary coils 17a, 17b, and 17c may also be spaced apart from the primary coils 17a, 17b, and 17c, like the secondary coils 21 of the exemplary embodiment. And a wire 27 is wound around the concentric core ferrite core 26 and magnetically coupled to the primary coils 17a, 17b, and 17c to generate an AC induction electromotive force pulse corresponding to the AC voltage pulse. Create

In more detail, as the primary coils 17a, 17b, 17c and the secondary coils 21a, 21b, 21c are magnetically mutually coupled by inductive coupling, they are juxtaposed on the primary coils. The magnetic field generated by the primary coil induces an induced current in the secondary coil.

That is, energy for charging is transferred in a non-contact manner by electromagnetic inductive coupling without an electrical contact point from the primary side to the secondary side.

The ferrite core 26 of the secondary coils 21a, 21b, and 21c has the same concentricity and outer diameter as the ferrite core 18 of the primary coils 17a, 17b, and 17c, but the thickness and height of the ferrite of the primary coil are Thinner and lower than core 18.

In this way, the primary coils 17a, 17b, 17c and the secondary coils 21a, 21b, 21c, using the ferrite cores 18, 26, change the frequency of the primary coils 17a, 17b, 17c by several hundred KHz. The electromotive force can be induced to the secondary coils 21a, 21b, and 21c within this range, so that the size of the charging device as a whole can be reduced.

The AC / DC converters 22a, 22b and 22c of the secondary circuit 20 'are connected one-to-one to the rear ends of the secondary coils 21a, 21b and 21c and through the secondary coils 21a, 21b and 21c. The rectified AC induced electromotive force is rectified and converted into direct current, and the connector parts 24a, 24b, and 24c connected one-to-one at the rear end are charged by converting the voltage converted into direct current into a constant voltage to charge the battery. .

The connector part 24 is a part connected to the battery charging terminal of the portable electronic device E, and is implemented in various forms suitable for the appearance and mechanical conditions of the portable electronic device E.

5 is a circuit diagram of the sensor unit illustrated in FIG. 4.

As illustrated, each sensor unit 14a, 14b, 14c constituting the sensor unit 14 'includes sensors HS1, HS2, and HS3, and the sensors HS1, HS2, and HS3 have secondary circuits ( Corresponding to each magnet 25 of 20 '), a magnetic field generated by the magnet 25 is sensed to generate electromotive force, and then output signals M / S1, M / S2, and M / S3. Meanwhile, in the present embodiment, the sensors HS1, HS2, and HS3 are configured as hall sensors, but various types of sensors capable of detecting the magnet 25 may be configured without being limited thereto.

FIG. 6 is a circuit diagram of the PWM control unit shown in FIG. 4.

As shown, the PWM controller 13 includes a PWM IC 13a, an amplifier 13b, and noise filter units 13ca, 13cb, and 13cc.

The PWM IC 13a is connected to the sensor units 14a, 14b, and 14c. When the signals M / S1, M / S2, and M / S3 are input from any one or more of the three sensor units, a PWM IC 13a is applied. MOSFETs Q1 and Q2, which are connected to the output of the PWM IC 13a and constitute the amplifier 13b, respectively, amplify the minute current of the high frequency signal generated by the PWM IC 13a (waveform of FIG. 8A). Reference).

The amplified high frequency is branched and supplied to the noise filter units 13a, 13b, and 13c connected one-to-one to the front ends of the primary coils 17a, 17b, and 17c, and the noise filter units 13a, 13b, and 13c are provided. The noise component included in the high frequency is applied by the series connected capacitors (C1, C2), (C3, C4), and (C5, C6) constituting the circuit (see waveform of FIG. 8B).

7 is a circuit diagram of the connector portion shown in FIG. 4.

In the secondary coil 21a, an AC waveform is output as shown in FIG. 8C, and as shown in FIG. 7, the connector part 24a is AC by the resistance values of the DC / DC converter DDC and the two resistors R1 and R2. The DC voltage of the / DC converter 22a is converted into a constant voltage necessary for charging. This constant voltage becomes a direct current waveform as shown in Fig. 8D.

Referring to the operation of the contactless charging device of the above-described configuration, the general commercial AC power is converted to direct current through the power input unit 11, the output 12V is applied to each component including the primary coil 17. .

In this state, when the battery charging terminals of the portable electronic device E are connected to any one or more of the three connector parts 24a, 24b, and 24c, and are positioned on the primary circuit 10 ', the secondary circuit ( Sensors 14a, 14b and 14c recognize the magnetic fields of the magnets provided at the 20 ') to generate electromotive force, and PWMs connected to the rear ends of the signals (M / S1, M / S2, M / S3) by the electromotive force. Input to the control unit 13.

As a result, the high frequency AC voltage is generated by driving the PWM IC 13a of the PWM control unit 13 and noise is removed to apply the high frequency AC voltage pulses to the primary coils 17a, 17b, and 17c.

In this way, as the power is supplied to the primary coils 17a, 17b, and 17c and the AC voltage pulse is applied, the secondary coils 21a, 21b, and 21c located at the upper part with a predetermined gap in the primary coil are in high frequency AC. Generate an AC induced electromotive force pulse corresponding to the voltage pulse.

The AC induced electromotive force pulses are converted into direct current through the AC / DC converters 22a, 22b and 22c in one-to-one correspondence with the corresponding secondary coils 21a, 21b and 21c, and the AC / DC converters 22a, 22b and 22c. Charging is performed by supplying the battery with a constant voltage necessary for charging in the connector parts 24a, 24b, and 24c connected one to one).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

10 ... primary circuit
11.Power input
13 PWM Control
14 ... sensor
17 ... Primary coil
20 ... secondary circuit
21 ... 2nd coil
22 ... AC / DC Converter
24.Connector part
30.Hands free module
31.Bluetooth Converter
32.Wireless transceiver
33.Audio Control
34 ... key input
35 ... speakers
36 ... Mike
40.Charger body
E ... Portable Electronics

Claims (7)

The power input unit converts general-use AC power into DC voltage and outputs it, the sensor unit which detects the approach of the secondary circuit and outputs a signal, and generates and filters high frequency by PWM control when the signal is input. A primary circuit including a PWM control unit for applying a high frequency AC voltage pulse to the primary coil and a primary coil to which an output of the power input unit is applied and inducing charging power to the high frequency AC voltage pulse;
A secondary coil spaced apart from the primary coil to generate an AC induced electromotive force pulse corresponding to the AC voltage pulse by inductive coupling with the primary coil, and AC / converting the AC voltage of the secondary coil to a DC voltage A secondary circuit having a DC converter and a connector unit converting the DC voltage of the AC / DC converter into a constant voltage for charging and connecting the battery to a battery charging terminal of the portable electronic device; And
A wireless transmitter and receiver for wireless communication with the portable electronic device, a Bluetooth converter for converting an audio signal transmitted and received through the wireless transmitter and receiver into a signal conforming to the Bluetooth standard, and a digital signal output from the Bluetooth converter for analog and And a hands-free module including an audio control unit for converting an analog signal input from a microphone after conversion, or converting an analog signal input from a microphone into a digital signal and transmitting the digital signal to the Bluetooth conversion unit, and a key input unit for inputting an operation signal to the Bluetooth conversion unit. and,
The PWM control unit includes a PWM IC for generating a high frequency by a signal input of the sensor unit, an amplifier configured to amplify a high frequency fine current generated by a MOSFET connected to an output terminal of the PWM IC, and the front of the primary coil. Transformer-type solid-state charging device with a hands-free function characterized in that it comprises a noise filter that is composed of a capacitor connected in series one-to-one and connected in series to remove the noise component contained in the high frequency.
A power input unit for converting a general commercial AC power into a DC voltage and outputting the signal, a plurality of sensor units for detecting a plurality of secondary circuit approaches, respectively, and outputting a signal, and a signal of at least one sensor unit among the plurality of sensor units When the high frequency by the PWM control and filtering by applying a high-frequency AC voltage pulse to the primary coil, and the output of the power input unit is applied a plurality of high-frequency alternating voltage pulse to induce charging power A primary circuit having a primary coil;
A plurality of secondary coils spaced apart from each of the primary coils to generate AC induced electromotive force pulses corresponding to the AC voltage pulses by inductive coupling with the primary coils, and one-to-one connection with the secondary coils AC / DC converter that converts the DC voltage into DC voltage, and is connected to the AC / DC converter one-to-one to convert the DC voltage of the AC / DC converter into a constant voltage necessary for charging and to connect the battery charging terminal of the portable electronic device. A secondary circuit having a portion; And
A wireless transmitter and receiver for wireless communication with the portable electronic device, a Bluetooth converter for converting an audio signal transmitted and received through the wireless transmitter and receiver into a signal conforming to the Bluetooth standard, and a digital signal output from the Bluetooth converter for analog and And a hands-free module including an audio control unit for converting an analog signal input from a microphone after conversion, or converting an analog signal input from a microphone into a digital signal and transmitting the digital signal to the Bluetooth conversion unit, and a key input unit for inputting an operation signal to the Bluetooth conversion unit. and,
The PWM control unit includes a PWM IC for generating a high frequency by a signal input of the sensor unit, an amplifier configured to amplify a high frequency fine current generated by a MOSFET connected to an output terminal of the PWM IC, and the front of the primary coil. Transformer-type solid-state charging device with a hands-free function characterized in that it comprises a noise filter that is composed of a capacitor connected in series one-to-one and connected in series to remove the noise component contained in the high frequency.
The method of claim 1 or 2, wherein the primary circuit and the hands-free module,
It is embedded in the charging device body including a cylindrical portion, and a flat portion extending perpendicular to the longitudinal direction of the cylindrical portion from the center of the cylindrical portion,
The speaker is installed on one side of the cylindrical portion, the microphone is a transformerless contactless charging device with a hands-free function, characterized in that installed on the other side of the cylindrical portion.
3. The method according to claim 1 or 2,
The primary coil is made of a wire wound around the concentric ferrite core,
The secondary coil is located on the upper spaced apart from the primary coil, the transformer type contactless charging device with a hands-free function, characterized in that the wire is wound around the concentric ferrite core.
The method of claim 4, wherein
The primary circuit is built in the main body of the charging device, the primary coil is mounted inside the main body of the mounting groove formed on the upper side,
The secondary circuit is located in the upper spaced apart from the primary circuit and the secondary circuit is located in the lower portion of the portable electronic device, the secondary coil is mounted at a position corresponding to the primary coil,
Transformer-type solid-state charging device with a hands-free function, characterized in that the secondary circuit is mounted to the mounting groove of the charging device body when the battery is charged.
delete 3. The method according to claim 1 or 2,
The secondary circuit is provided with a magnet as many as the number of the secondary coil, the sensor unit has a hands-free function characterized in that the Hall sensor for generating an electromotive force by detecting the magnetic field of the magnet corresponding to the magnet Transformerless contactless charging device.

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