Wireless charging equipment for airplane

Abstract

The invention relates to wireless charging equipment for an airplane, which is arranged in an airplane seat armrest and comprises a transmitting end control SoC chip, a full-bridge circuit and a transmitting coil, a microcontroller, a power supply part and a full-bridge driving circuit are integrated on the transmitting end control SoC chip, and the microcontroller is connected with the full-bridge driving circuit and used for providing control signals for the full-bridge driving circuit; the output end of the full-bridge driving circuit is connected with the full-bridge circuit, and the full-bridge driving circuit is used for driving the full-bridge circuit, so that alternating current is generated on a transmitting coil, and an alternating magnetic field is generated; and the power supply part is used for providing a power supply for the transmitting end control SoC chip. According to the invention, the transmitting terminal controls the SoC chip to realize energy transmission between the SoC chip and the passenger electric equipment, such a way does not have risks of spontaneous combustion, explosion and the like of the power bank, does not need to use a charging wire, and can meet the charging requirements of passengers in different areas on the premise of ensuring the safety.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation airborne electronic equipment, and in particular to a wireless charging device for an aircraft. Background Art

[0002] Traditional airlines have many restrictions on charging mobile phones on airplanes for the sake of passenger safety. For example, it is strictly forbidden to use power banks to charge mobile phones, because the air pressure in the cabin is constantly changing during high-altitude flight, and power banks can easily burst outward in a pressure environment lower than the ground. The internal lithium battery materials are exposed to the air and chemical reactions occur, causing heat, smoke, fire and other dangers. In addition, the charging interfaces of electronic devices carried by passengers are not exactly the same, so the power interfaces provided on board may not meet the charging needs of passengers. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a wireless charging device for an aircraft, which can meet the charging needs of passengers in different areas under the premise of ensuring safety.

[0004] The technical solution adopted by the present invention to solve its technical problem is: to provide a wireless charging device for an aircraft, which is installed in the armrest of an aircraft seat, and includes a transmitting end control SoC chip, a full-bridge circuit and a transmitting coil; the transmitting end control SoC chip is integrated with a microcontroller, a power supply part and a full-bridge drive circuit, the microcontroller is connected to the full-bridge drive circuit, and is used to provide a control signal to the full-bridge drive circuit; the output end of the full-bridge drive circuit is connected to the full-bridge circuit, and is used to drive the full-bridge circuit; the power supply part is used to provide power for the transmitting end control SoC chip; the full-bridge circuit includes a first MOS tube, a second MOS tube, ... three MOS tubes and a fourth MOS tube, the gate of the first MOS tube is connected to the output end of the full-bridge drive circuit, the source is connected to the drain of the second MOS tube, and the drain is connected to the power supply end; the gate of the second MOS tube is connected to the output end of the full-bridge drive circuit, and the source is grounded; the gate of the third MOS tube is connected to the output end of the full-bridge drive circuit, the source is connected to the drain of the fourth MOS tube, and the drain is connected to the power supply end; the gate of the fourth MOS tube is connected to the output end of the full-bridge drive circuit, and the source is grounded; one end of the transmitting coil is connected to the source of the first MOS tube, and the other end is connected to the source of the third MOS tube.

[0005] The full-bridge drive circuit is implemented by two IR2014 chips, wherein an IN port of one IR2014 chip is connected to the first output terminal of the microcontroller, an HO port is connected to the gate of the first MOS tube, a VS port is connected to the source of the first MOS tube, and an LO port is connected to the gate of the second MOS tube; an IN port of another IR2014 chip is connected to the second output terminal of the microcontroller, an HO port is connected to the gate of the third MOS tube, a VS port is connected to the source of the third MOS tube, and an LO port is connected to the gate of the fourth MOS tube.

[0006] The transmitting coil adopts a three-coil structure.

[0007] The input end of the power supply part is connected to the output end of the DC-DC module, and the input end of the DC-DC module is connected to the on-board power supply through a filtering and voltage stabilizing circuit.

[0008] The transmitting coil is also connected to a coil current collector, which is used to collect the current analog signal of the transmitting coil; the I / O port of the transmitting end control SoC chip is connected to the LED light group, and a digital-to-analog converter is also integrated on the transmitting end control SoC chip. The input end of the digital-to-analog converter is connected to the coil current collector, and the output end is connected to the microcontroller, which is used to convert the collected current analog signal into a current digital signal. The microcontroller is also used to determine the working state of the transmitting coil according to the current digital signal, and control the LED light group through the I / O port on the transmitting end control SoC chip.

[0009] A control switch is provided between one end of the transmitting coil and the source of the first MOS tube, or between the other end and the source of the third MOS tube; a coil control module is also integrated on the transmitting end control SoC chip, the input end of the coil control module is connected to the NTC pin of the transmitting end control SoC chip, and the output end is connected to the control switch; the coil control module controls the control switch according to the voltage of the NTC pin of the transmitting end control SoC chip.

[0010] The coil control module is a comparator, a first input end of the comparator is connected to the NTC pin of the transmitter control SoC chip, a second input end is connected to the reference voltage end, and an output end is connected to the control switch; when the voltage of the NTC pin of the transmitter control SoC chip is less than the voltage of the reference voltage end, the control switch is controlled to be disconnected; when the voltage of the NTC pin of the transmitter control SoC chip is greater than the voltage of the reference voltage end, the control switch is controlled to be closed.

[0011] A charging mark is arranged on the surface of the aircraft seat armrest, and the position of the charging mark corresponds to the position of the transmitting coil.

[0012] Beneficial Effects

[0013] Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages and positive effects compared with the prior art: the present invention controls the SoC chip through the transmitting end to realize energy transmission between the chip and the passenger's electrical equipment, and completes electromagnetic induction charging. This method does not have the risk of spontaneous combustion, explosion and the like of power banks, and there is no charging cable, so the jitter during takeoff and landing of the aircraft will not affect the charging process, thereby being able to meet the charging needs of passengers in different areas while ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of an aircraft seat armrest in an embodiment of the present invention;

[0015] Figure 2 is a structural block diagram of a wireless charging device for an aircraft according to an embodiment of the present invention;

[0016] Figure 3 is a circuit diagram of a full-bridge circuit and a transmitting coil in an embodiment of the present invention;

[0017] Figure 4 is a circuit diagram of a full-bridge drive circuit in an embodiment of the present invention;

[0018] Figure 5 is a circuit diagram of a filtering and voltage stabilizing circuit in an embodiment of the present invention;

[0019] Figure 6 is a circuit diagram of a comparator in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0021] An embodiment of the present invention relates to a wireless charging device for an aircraft, wherein the wireless charging device is installed in a Figure 1 In the aircraft seat armrest A shown, a charging mark B is also provided on the surface of the aircraft seat armrest A.

[0022] like Figure 2As shown, the wireless charging device for aircraft of this embodiment includes a transmitter control SoC chip, a full-bridge circuit and a transmitter coil. Among them, the transmitter control SoC chip integrates a microcontroller, a power supply part and a full-bridge drive circuit, the microcontroller is connected to the full-bridge drive circuit, and is used to provide a control signal to the full-bridge drive circuit; the output end of the full-bridge drive circuit is connected to the full-bridge circuit, and is used to drive the full-bridge circuit; the power supply part is used to provide power for the transmitter control SoC chip.

[0023] like Figure 3 As shown, the full-bridge circuit includes a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3 and a fourth MOS transistor Q4, wherein the gate of the first MOS transistor Q1 is connected to the output end of the full-bridge drive circuit, the source is connected to the drain of the second MOS transistor Q2, and the drain is connected to the power supply end; the gate of the second MOS transistor Q2 is connected to the output end of the full-bridge drive circuit, and the source is grounded; the gate of the third MOS transistor Q3 is connected to the output end of the full-bridge drive circuit, the source is connected to the drain of the fourth MOS transistor Q4, and the drain is connected to the power supply end; the gate of the fourth MOS transistor Q4 is connected to the output end of the full-bridge drive circuit, and the source is grounded; one end of the transmitting coil Trans is connected to the source of the first MOS transistor Q1, and the other end is connected to the source of the third MOS transistor Q3. The working principle of the full-bridge circuit is as follows: in the positive half-wave, the first MOS tube Q1 and the fourth MOS tube Q4 are turned on, and the second MOS tube Q2 and the third MOS tube Q3 are turned off; in the negative half-wave, the second MOS tube Q2 and the third MOS tube Q3 are turned on, and the first MOS tube Q1 and the fourth MOS tube Q4 are turned off; in this way, an alternating current can be generated on the transmitting coil Trans, so that the transmitting coil generates an alternating magnetic field, thereby realizing charging. The transmitting coil Trans in this embodiment can adopt a three-coil structure, so as to achieve a larger area to adapt to the position of the receiving coil of different electronic devices, ensuring that various electronic devices can be applied. In addition, the multi-coil structure also has a higher transmission efficiency.

[0024] like Figure 4As shown, the full-bridge drive circuit in this embodiment is implemented by two IR2014 chips, wherein the IN port of one IR2014 chip is connected to the first output terminal of the microcontroller, the HO port is connected to the gate of the first MOS tube, the VS port is connected to the source of the first MOS tube, and the LO port is connected to the gate of the second MOS tube; the IN port of another IR2014 chip is connected to the second output terminal of the microcontroller, the HO port is connected to the gate of the third MOS tube, the VS port is connected to the source of the third MOS tube, and the LO port is connected to the gate of the fourth MOS tube. Since the HO port and the VS port are respectively connected to the gate and source of the MOS tube, a bootstrap circuit is formed, which can drive the diode of the upper half bridge, and the LO port is connected to the gate of the MOS light, which can drive the MOS tube of the lower half bridge. In this embodiment, the input of the full-bridge driving circuit is a control signal of a microcontroller. The generation of the control signal can be realized by a pre-burned adjustable PWM frequency program, which can generate two square wave control signals with dead zone complementarity, so as to ensure that the third MOS tube Q3 and the fourth MOS tube Q4, as well as the first MOS tube Q1 and the second MOS tube Q2 in the full-bridge circuit will not be turned on at the same time, thereby ensuring the driving control capability.

[0025] The input end of the power supply part of this embodiment is connected to the output end of the DC-DC module, and the input end of the DC-DC module is connected to the on-board power supply through a filtering and voltage stabilizing circuit. The DC-DC module can use a non-isolated DC-DC converter module manufactured by Murata. The non-isolated DC-DC converter module is small in size and can meet the requirements of being installed in the armrest of an aircraft seat.

[0026] Filter voltage regulator circuit such as Figure 5 As shown, a voltage stabilizing diode VD1 is connected between the base and ground of transistor VT1, so that the input voltage through resistor R1 makes the voltage stabilizing diode VD1 in a reverse biased state. At this time, the voltage stabilizing characteristic of the voltage stabilizing diode VD1 makes the base voltage of transistor VT1 stable, so that the DC voltage output by the emitter of transistor VT1 can also be stable. The transistor VT1, resistor R1 and capacitor C1 in this circuit form an electronic filter circuit, which is equivalent to a capacitor with a capacity of C1×β1, where β1 is the current amplification factor of transistor VT1. The resistor R1 and capacitor C1 in this circuit form an RC filter circuit. On the one hand, the resistor R1 provides base bias current for the transistor VT1, and is also a filter resistor.

[0027] In this embodiment, the transmitting coil is also connected to a coil current collector, and the coil current collector is used to collect the current analog signal of the transmitting coil. The coil current collector can use a current transformer, which can be connected in series with the transmitting coil to obtain the current analog signal of the transmitting coil in real time. The I / O port of the transmitting end control SoC chip is connected to the LED light group, and the transmitting end control SoC chip is also integrated with a digital-to-analog converter. The input end of the digital-to-analog converter is connected to the coil current collector, and the output end is connected to the microcontroller, which is used to convert the collected current analog signal into a current digital signal. The microcontroller is also used to determine the working state of the transmitting coil according to the current digital signal, and control the LED light group through the I / O port on the transmitting end control SoC chip.

[0028] In the present embodiment, during the charging process, the digital-to-analog converter converts the current analog signal of the current transmitting coil collected by the current transformer into a current digital signal, and transmits it to the microcontroller. The microcontroller can compare the obtained current signal with the current signal under normal charging conditions. When the electronic device is charging normally, the obtained current signal should be similar to the current signal under normal charging conditions. At this time, the microcontroller sends a first control signal, and controls the I / O port on the SoC chip through the transmitting end to transmit it to the LED light group. When the LED light group receives the first control signal, the LED red light will light up. When the electronic device has a charging abnormality, the obtained current signal is different from the current signal under normal charging conditions. At this time, the microcontroller sends a second control signal, and controls the I / O port on the SoC chip through the transmitting end to transmit it to the LED light group. When the LED light group receives the second control signal, the LED light will flash.

[0029] A control switch is provided between one end of the transmitting coil and the source of the first MOS tube, or between the other end and the source of the third MOS tube in this embodiment; a coil control module is also integrated on the transmitting end control SoC chip, the input end of the coil control module is connected to the NTC pin of the transmitting end control SoC chip, and the output end is connected to the control switch; the coil control module controls the control switch according to the voltage of the NTC pin of the transmitting end control SoC chip.

[0030] Since the transmitting coil and the receiving coil transmit energy through the magnetic field during the charging process of the wireless charging device, the transmission efficiency cannot reach 100%, and there will be a certain amount of energy loss. Therefore, the wireless charging device will generate heat energy. Once the wireless charging device is heated, the voltage of the NTC pin of the transmitting end control SoC chip will become smaller. Based on this principle, the coil control module of this embodiment can use a comparator, the first input end of the comparator is connected to the NTC pin of the transmitting end control SoC chip, the second input end is connected to the reference voltage end VREF, and the output end is connected to the control switch; when the voltage of the NTC pin of the transmitting end control SoC chip is less than the voltage of the reference voltage end VREF, it indicates that the wireless charging device is overheated, and the output of the comparator is low, thereby controlling the control switch to disconnect and automatically ending the power transmission; when the voltage of the NTC pin of the transmitting end control SoC chip is greater than the voltage of the reference voltage end, it indicates that the temperature of the wireless charging device is normal, and the output of the comparator is high, thereby controlling the control switch to close and resume normal charging.

[0031] It is not difficult to find that the present invention controls the SoC chip through the transmitter to achieve energy transmission between the passenger's electrical equipment and complete electromagnetic induction charging. This method does not have the risk of spontaneous combustion, explosion, and the like of power banks, and there is no charging cable, so the jitter during takeoff and landing of the aircraft will not affect the charging process, thereby being able to meet the charging needs of passengers in different areas while ensuring safety.

Claims

1. A wireless charging device for an aircraft, characterized in that: Installed in the armrest of an aircraft seat, it includes a transmitter control SoC chip, a full-bridge circuit and a transmitter coil; the transmitter control SoC chip is integrated with a microcontroller, a power supply part and a full-bridge drive circuit, the microcontroller is connected to the full-bridge drive circuit, and is used to provide a control signal to the full-bridge drive circuit; the output end of the full-bridge drive circuit is connected to the full-bridge circuit, and is used to drive the full-bridge circuit; the power supply part is used to provide power for the transmitter control SoC chip; the full-bridge circuit includes a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube, the gate of the first MOS tube is connected to the output end of the full-bridge drive circuit, the source is connected to the drain of the second MOS tube, and the drain is connected to the power supply end; the gate of the second MOS tube is connected to the output end of the full-bridge drive circuit, and the source is grounded; the gate of the third MOS tube is connected to the output end of the full-bridge drive circuit, the source is connected to the drain of the fourth MOS tube, and the drain is connected to the power supply end; the gate of the fourth MOS tube is connected to the output end of the full-bridge drive circuit, and the source is grounded; One end of the transmitting coil is connected to the source of the first MOS transistor, and the other end is connected to the source of the third MOS transistor.

2. The wireless charging device for an aircraft according to claim 1, characterized in that: The full-bridge drive circuit is implemented by two IR2014 chips, wherein an IN port of one IR2014 chip is connected to the first output terminal of the microcontroller, an HO port is connected to the gate of the first MOS tube, a VS port is connected to the source of the first MOS tube, and an LO port is connected to the gate of the second MOS tube; an IN port of another IR2014 chip is connected to the second output terminal of the microcontroller, an HO port is connected to the gate of the third MOS tube, a VS port is connected to the source of the third MOS tube, and an LO port is connected to the gate of the fourth MOS tube.

3. The wireless charging device for an aircraft according to claim 1, characterized in that: The transmitting coil adopts a three-coil structure.

4. The wireless charging device for an aircraft according to claim 1, characterized in that: The input end of the power supply part is connected to the output end of the DC-DC module, and the input end of the DC-DC module is connected to the on-board power supply through a filtering and voltage stabilizing circuit.

5. The wireless charging device for an aircraft according to claim 1, characterized in that: The transmitting coil is also connected to a coil current collector, which is used to collect the current analog signal of the transmitting coil; the I / O port of the transmitting end control SoC chip is connected to the LED light group, and a digital-to-analog converter is also integrated on the transmitting end control SoC chip. The input end of the digital-to-analog converter is connected to the coil current collector, and the output end is connected to the microcontroller, which is used to convert the collected current analog signal into a current digital signal. The microcontroller is also used to determine the working state of the transmitting coil according to the current digital signal, and control the LED light group through the I / O port on the transmitting end control SoC chip.

6. The wireless charging device for an aircraft according to claim 1, characterized in that: A control switch is provided between one end of the transmitting coil and the source of the first MOS tube, or between the other end and the source of the third MOS tube; a coil control module is also integrated on the transmitting end control SoC chip, the input end of the coil control module is connected to the NTC pin of the transmitting end control SoC chip, and the output end is connected to the control switch; the coil control module controls the control switch according to the voltage of the NTC pin of the transmitting end control SoC chip.

7. The wireless charging device for an aircraft according to claim 6, characterized in that: The coil control module is a comparator, a first input end of the comparator is connected to the NTC pin of the transmitter control SoC chip, a second input end is connected to the reference voltage end, and an output end is connected to the control switch; when the voltage of the NTC pin of the transmitter control SoC chip is less than the voltage of the reference voltage end, the control switch is controlled to be disconnected; when the voltage of the NTC pin of the transmitter control SoC chip is greater than the voltage of the reference voltage end, the control switch is controlled to be closed.

8. The wireless charging device for an aircraft according to claim 1, characterized in that: A charging mark is arranged on the surface of the aircraft seat armrest, and the position of the charging mark corresponds to the position of the transmitting coil.

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