Wireless charging circuit having flat coil
A flat coil and wireless charging technology, which is applied in the direction of battery circuit devices, circuit devices, collectors, etc., can solve the problems of large thickness, large floor space, unfavorable flattening of products, etc., and achieve good environmental adaptability, low loss, The effect of low magnetic permeability
Active Publication Date: 2016-11-16
WUXI JINGLEI ELECTRONICS
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
In the prior art, the coil generally has multiple layers, its thickness is relatively large, and the floor area is also large, which is not conducive to the flattening of the product
Method used
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Embodiment Construction
[0011] figure 1 It is a circuit diagram of the present invention. like figure 1 As shown, the present invention includes a power supply circuit and a receiving circuit. The power supply circuit includes a square wave generation circuit, a low-pass filter circuit, a power amplifier circuit and a transmission frequency oscillation circuit connected in sequence. The receiving circuit includes a receiving frequency oscillating circuit and a rectifying circuit connected in sequence.
[0012] The square wave generating circuit is a crystal oscillator Y.
[0013] The low-pass filter circuit includes an operational amplifier OA. The first resistor R1 and the second resistor R2 are connected in series with the positive input terminal of the operational amplifier OA. The third resistor R3 is connected to the inverting input terminal of the operational amplifier OA. A first capacitor C1 is connected between the output terminal of the operational amplifier OA and the common terminal...
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Abstract
The invention discloses a wireless charging circuit having a flat coil. The wireless charging circuit comprises a power supply circuit and a reception circuit, wherein the power supply circuit comprises a square wave generation circuit, a low pass filter circuit, a power amplification circuit and an emission frequency oscillation circuit which are sequentially connected, the reception circuit comprises a reception frequency oscillation circuit and a rectification circuit which are sequentially connected, an inductor of the frequency oscillation circuit is the flat coil formed by winding a self-adhesive enamelled wire, the quantity of winding layers of the coil is one, and a square magnetic shielding material is fixed between the inductor and other parts of the circuit. According to the wireless charging circuit, the induction coil manufactured in a special winding mode is utilized, the induction coil utilizes a combination surface of the magnetic material to a maximum degree, characteristics of the flat magnetic core are utilized, magnetic conductibility is low, loss is relatively low, environment adaptability is relatively good, stable performance is further realized, and electromagnetic interference on normal operation of a device can be effectively prevented.
Description
technical field [0001] The invention relates to wireless charging technology, in particular to a wireless charging circuit with a flat coil. Background technique [0002] Wireless charging technology is a technology that uses inductive coupling to transmit energy from the power supply equipment to the power-consuming device. The device uses the received energy to charge the battery. Since the energy is transmitted between the charger and the power-consuming device through inductive coupling, the two There is no wire connection between them, but an electromagnetic induction coil is used to realize it. In the prior art, the coil generally has multiple layers, and its thickness is relatively large, and the floor area is also large, which is not conducive to the flattening of the product. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention discloses a wireless charging circuit with a flat coil. [0004] Technical scheme of the presen...
Claims
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Login to View More IPC IPC(8): H02J50/12H02J7/02
CPCH02J7/025
Inventor 王斌
Owner WUXI JINGLEI ELECTRONICS