JP2011004479A - Wireless power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless power supply device expanding a distance for electric supply.SOLUTION: The wireless power supply device includes a signal transmission unit and a signal reception unit. The signal transmission unit includes a power supply unit, a voltage control transmission circuit, a signal amplification unit and a transmission antenna portion. The power supply unit supplies electric energy to the voltage control transmission circuit and the signal amplification unit. The voltage control transmission circuit is used to generate an RF signal, and the signal amplification unit is used to amplify the RF signal. The transmission antenna portion is used to transmit the RF signal. The signal reception unit includes a reception antenna and the rectifier circuit, and the reception antenna receives the RF signal transmitted from the transmission antenna to generate current. The rectifier circuit rectifies the current generated by the antenna, and then, supplies a load. The wireless power supply device wirelessly supplies electricity by transmission of an RF signal, and has user-friendliness with high resistance to decline and long transmission distance.

Description

  The present invention relates to a power supply technology, and more particularly to a wireless power supply apparatus.

  Mobile low-efficiency electronic products such as mobile phones, MP3s, and mice generally require battery supply. When battery energy is insufficient, they are usually charged with a wired charger. The charger has problems such as poor compatibility.

  In order to solve the above-described problem, for example, as disclosed in the portable wireless charging device of Patent Document 1, the wireless charging device includes a charger and a portable charging component. The charger includes a power supply voltage standard electrical connection module, a transformer module, and an AC coil module. The power supply voltage standard electrical connection module is connected to an AC coil module via a transformer module. The charging component on the portable device includes an inductance coil module, a rectifying module, and a filter module, and the inductance coil module passes through the serial rectifying module and the filter module in this order and is connected to the battery of the portable device. The wireless charging device employing the portable device having the above-described structure realizes a wireless charging function that can be placed on the hand using a magnetic induction coil. Also, Patent Document 2 discloses a similar technique.

  However, the above-mentioned wireless charging device uses a magnetic induction coil to realize a wireless charging function, but the electromagnetic induction coil emits a low electromagnetic wave frequency, it is rapidly decaying, and can only be charged at a short distance. Is inconvenient.

The specification of the People's Republic of China No. 200510030239 China Patent No. 20000115859 Specification

  SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless power supply apparatus that expands an electric supply distance with respect to drawbacks existing in the known art.

  In order to achieve the above object, a wireless power supply apparatus provided by the present invention includes a signal transmission unit and a signal reception unit. The signal transmission unit includes a power supply unit, a voltage control transmission circuit, a signal amplification unit, and a transmission antenna unit. The power supply unit provides electrical energy to the voltage control transmission circuit 11 and the signal amplification unit. The voltage control transmission circuit is used to generate an RF signal, and the signal amplification unit is used to amplify the RF signal. The transmitting antenna unit is used to transmit the RF signal. The signal receiving unit includes a receiving antenna and a rectifying circuit, and the receiving antenna receives an RF signal transmitted from the transmitting antenna unit and generates a current. The rectifier circuit provides a load after rectifying the current generated by the antenna.

  In the wireless power supply device of the present invention, when the signal transmitting unit transmits an RF signal, the signal receiving unit receives the RF signal and supplies a load. Wireless power supply is realized by RF signal transmission, and it has a feature that it is convenient to use because it has a strong resistance to decay and a long transmission distance.

It is a block diagram regarding one Example of the wireless power supply device of this invention. It is a circuit diagram regarding the voltage control transmission circuit of the wireless power supply device of this invention shown in FIG. FIG. 2 is a structural diagram regarding a transmitting antenna unit of the wireless power supply device of the present invention shown in FIG. 1. It is a circuit diagram regarding the rectifier circuit of the wireless power supply device of this invention shown in FIG.

  As shown in FIG. 1, the wireless power supply apparatus 100 of the present invention uses a mouse electricity supply as an example, and includes a signal transmission unit 1 and a signal reception unit 2. The signal transmission unit 1 includes a power supply unit 10, a voltage control transmission circuit 11, a one-stage amplifier 12, a two-stage amplifier 13, an isolator 14, and a transmission antenna unit 15. The one-stage amplifier 12 and the two-stage amplifier 13 form a signal amplification unit.

  The power supply unit 10 provides electric energy to the voltage control transmission circuit 11, the one-stage amplifier 12, and the two-stage amplifier 13 after the pressure of the external power supply is lowered. In an embodiment of the present invention, the power supply unit can provide a voltage of 6 volts.

  As shown in FIG. 2, the voltage control transmission circuit 11 includes a first electric resistance R1 and a second electric resistance R2 in series and a voltage control transmission circuit VCO. The first electric resistance R1 is a variable electric resistance. The voltage control transmission circuit VCO includes a first pin TUNE, a second pin VCC, a third pin GND, and a fourth pin RFout. The first pin TUNE is electrically connected between the electric resistance R1 and the second electric resistance R2, the second pin VCC is connected to the second electric resistance R2, the third pin GND is connected to the electric resistance R1, and The negative input connection terminal Vin− is electrically connected to the negative input connection terminal Vin− and the negative input connection terminal Vin− is grounded. The positive input connection terminal Vin + is connected between the second electrical resistance R2 and the second pin VCC, the positive input connection terminal Vin + and the power supply unit 10 are connected, and the fourth pin RFout is connected to one end of the one-stage amplifier 12. To do. The voltage control transmission circuit VCO is for generating an RF signal, and the magnitude of the output frequency can be adjusted by adjusting the magnitude of the first electric resistance R1. In this embodiment, the voltage control transmission circuit outputs a 2.4 GHz frequency signal.

  Subsequently, as shown in FIGS. 1 and 2, another end of the one-stage amplifier 12 and the two-stage amplifier 13 are connected. The one-stage amplifier 12 is for amplifying the RF signal output from the voltage control transmission circuit VCO. In the present embodiment, the single-stage amplifier 12 is a signal amplifier. In this embodiment, the gain of the RF signal with respect to 2.4 GHz is 17.5 dB, and the two-stage amplifier 13 further amplifies the RF signal output from the single-stage amplifier 12 continuously. In this embodiment, the two-stage amplifier 13 is a power amplifier, the gain is 14 dB, and the output power is 1 watt. One end of the isolator 14 is connected to the two-stage amplifier 13, and the other end is electrically connected to the transmitting antenna unit 15. The isolator 14 protects the power amplifier and prevents the power amplifier from being damaged by reflecting the signal. Fulfill.

  As shown in FIGS. 1 and 3, the transmission antenna unit 15 forms a phase array and is connected to a plurality of antennas (151, 152, 153, 154) having a supply point K. These antennas are provided with rectangular radiation parts (1511, 1521, 1531, 1541) and connection parts (1512, 1522, 1532, 1542) connected to the supply point K. The supply point K and the isolator 14 are electrically connected. Connect to. The length between the connecting portions of the antenna and the length between the radiating portions are substantially the same. In the present embodiment, the length of the radiating portion of these antennas is approximately half of the electromagnetic wave wavelength with a frequency of 2.4 GHz. The transmitting antenna unit 15 has a high gain and a wide half-power beam width.

  As shown in FIG. 1, the signal receiving unit 2 includes a receiving antenna 21, a rectifying circuit 22 electrically connected to the receiving antenna 21, and a capacitor 23 electrically connected to the rectifying circuit 22. The receiving antenna 21 is a bipolar antenna or a microstrip antenna. In this embodiment, the receiving antenna 21 is a bipolar antenna provided with a supply unit and a grounding unit. Since the bipolar antenna is omnidirectional in the horizontal direction, signal reception during horizontal movement of the mouse is good.

  As shown in FIGS. 1 and 4, the rectifier circuit 22 is a rectified voltage doubling circuit, which is connected in the order of a first diode D1, a first capacitor C1, a second capacitor C2, and a second diode D2. A first input connection terminal P1 is connected between the first diode D1 and the second diode D2, and a second input connection terminal P2 is connected between the first capacitor C1 and the second capacitor C2. The first input connection terminal P1 and the second input connection terminal P2 are electrically connected to the supply part and the ground part of the receiving antenna 21, respectively, and the positive output connection terminal Vout + is connected between the first diode D1 and the first capacitor C1. The negative output connection terminal Vout− is connected between the second diode D2 and the second capacitor C2. Each of the positive output connection terminal Vout + and the negative output connection terminal Vout− is electrically connected to a related circuit that requires electrical energy inside the mouse.

  Both the first diode D1 and the second diode D2 are Schottky diodes, and thus the switching efficiency of the rectifier circuit can be improved. The rectifier circuit 22 is a full-wave rectifier and has a double voltage effect. The capacitor 23 is connected between the positive output connection terminal Vout + and the negative output connection terminal Vout−. In this embodiment, the capacitor 23 is a large-capacity capacitor 23 and can store a large amount of electricity. Finally, the mouse provides enough electrical energy.

  As described above, in the wireless power supply device 100 of the present invention, the signal transmission unit 1 transmits an RF signal, and the signal reception unit 2 receives the RF signal and becomes a power supply load. Wireless power supply is realized by RF signal transmission, strengthening the anti-decay capability, increasing the transmission distance, making it convenient to use.

DESCRIPTION OF SYMBOLS 100 Wireless power supply device 1 Signal transmission unit 10 Power supply unit 11 Voltage control transmission circuit 12 One stage amplifier 13 Two stage amplifier 14 Isolator 15 Transmission antenna part 151,152,153,154 Single-shaped antenna 1511,1521,1531,1541 Radiation part 1512 , 1522, 1532, 1542 Connection unit 2 Signal reception unit 21 Reception antenna 22 Rectifier circuit 23 Capacitor VCO Voltage control transmission circuit TUNE First pin VCC Second pin GND Third pin RFout Fourth pin R1 First electric resistance R2 Second electric Resistance Vin + Positive input connection terminal Vin- Negative input connection terminal P1 First input connection terminal P2 Second input connection terminal C1 First capacitor C2 Second capacitor D1 First diode D2 Second diode Vout + Positive output connection terminal Vout- Negative output connection end

Claims (9)

In wireless power supply,
The signal transmission unit includes a power supply unit, a voltage control transmission circuit, a signal amplification unit, and a transmission antenna unit.
The power supply unit provides electrical energy to the voltage control transmission circuit and the signal amplification unit, the voltage control transmission circuit is used for RF signal generation, and the signal amplification unit is used to amplify the RF signal and transmit The antenna part is for transmitting the RF signal,
The signal receiving unit includes a receiving antenna and a rectifying circuit, the receiving antenna receives an RF signal transmitted from the transmitting antenna unit and generates a current, and the rectifying circuit performs rectification on the current generated by the antenna, A wireless power supply characterized by supplying a load.   The wireless power supply apparatus according to claim 1, wherein the signal receiving unit includes a capacitor connected to one end of a rectifier circuit.   3. The wireless power supply device according to claim 2, wherein the capacitor is a large-capacity capacitor.   4. The wireless power supply device according to claim 3, wherein the rectifier circuit is a rectified voltage doubling circuit.   5. The wireless power supply device according to claim 4, wherein the rectified voltage doubling circuit is connected in the order of a first diode, a first capacitor, a second capacitor, and a second diode, and a first input is provided between the first diode and the second diode. A connection terminal is connected between the first capacitor and the second capacitor, a second input connection terminal is connected, and the first input connection terminal and the second input connection terminal are electrically connected to the receiving antenna, A positive output connection terminal is connected between the first capacitors, a negative output connection terminal is connected between the second diode and the second capacitor, and the positive output connection terminal and the negative output connection terminal are electrically connected to the load, respectively. A wireless power supply device.   6. The wireless power supply apparatus according to claim 5, wherein both the first diode and the second diode are Schottky diodes.   7. The wireless power supply apparatus according to claim 6, wherein the signal amplification unit includes a single-stage amplifier and a two-stage amplifier in series.   8. The wireless power supply apparatus according to claim 7, wherein the one-stage amplifier is a signal amplifier and the two-stage amplifier is a power amplifier.   9. The wireless power supply apparatus according to claim 8, wherein the signal transmission unit includes an isolator connected between the power amplifier and the transmission antenna unit.

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