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Power supply device, integrated circuit, power transmitter and impedance matching method

A technology for generating circuits and resonant circuits, applied in circuit devices, output power conversion devices, electrical components, etc., can solve the problems of increasing the size and weight of the device, poor controllability and adjustability, etc.

Active Publication Date: 2016-11-02
NANJING SILERGY SEMICON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the actual load impedance is often different from the theoretical impedance when designing the matching network. At the same time, the passive impedance matching network will increase the volume and weight of the device, and its controllability and adjustability are also poor.

Method used

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  • Power supply device, integrated circuit, power transmitter and impedance matching method
  • Power supply device, integrated circuit, power transmitter and impedance matching method
  • Power supply device, integrated circuit, power transmitter and impedance matching method

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Embodiment Construction

[0059] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0060] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0061]Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another elemen...

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Abstract

Disclosed are a resonant non-contact power supply device, an integrated circuit, a power transmitting end and an impedance matching method. The resonant non-contact power supply device includes: a converter, which converts the input power signal into an adjustable DC voltage; an inverter, which receives the adjustable DC voltage and outputs an AC voltage with a leakage inductance resonant frequency; a resonant circuit on the transmitting side, including a transmitting coil for receiving the AC voltage from the inverter; a receiving side resonant circuit including a receiving coil, the receiving coil is coupled in a non-contact manner separately from the transmitting coil, the receiving side resonant circuit For receiving electric energy from the transmitting coil; the control circuit controls the converter to adjust the adjustable DC voltage according to the phase difference between the AC voltage output by the inverter and the AC current, so that the phase difference remains predetermined angle value. In this way, the impedance matching can be made not limited by the load impedance, and the controllability and adjustability of the circuit impedance matching can be improved.

Description

technical field [0001] The invention relates to power electronics technology, in particular to a power supply device, an integrated circuit, a power transmitting terminal and an impedance matching method. Background technique [0002] Based on its convenient and practical features, non-contact power supply technology is widely used in the field of electronic products, especially in the industry of low-power electronic products such as mobile phones, MP3 players, digital cameras, portable computers, etc. The contactless power supply device in the prior art usually includes a transformer composed of a transmitting coil L1 and a receiving coil L2, and usually utilizes the performance of the magnetic field coupling between the transmitting coil and the receiving coil of the transformer to transfer energy from the power transmitting end to the power receiving end. [0003] In order to improve the power transmission efficiency, a passive impedance matching network is usually added...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02M7/04H02M3/00
CPCH02J50/12
Inventor 余峰赵晨
Owner NANJING SILERGY SEMICON TECH CO LTD
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