JP2010239844A5

JP2010239844A5 -

Info

Publication number: JP2010239844A5
Application number: JP2009088084A
Authority: JP
Filing date: 2009-03-31
Publication date: 2012-05-24
Anticipated expiration: 2029-03-31

Description

上記課題を解決するために、本発明は以下のような構成を備えることを特徴とする。
（１）１次コイルを有する１次側回路と２次コイルを有する２次側回路とのコイルリンクを用いて一定の電圧振幅を持つ電力増幅器から出力される電力を伝送する電力伝送回路において、前記１次側回路は、前記１次コイルと、該１次コイルに直列に接続される第１リアクタンスと、前期電力増幅器と、該電力増幅器に対して並列に接続される第２リアクタンスと、を有し、前記第１リアクタンスは予め設定される前記１次コイルと前記２次コイルとの間の最小距離及び最大距離に関して前記２次側回路の電力が同一となるように設計され、前記第２リアクタンスは前記電力増幅器の力率を上げるためコイル間距離が前記最小距離から前記最大距離に変化したときの前記電力増幅器の電力ピークが小さくなるように設計されていることを特徴とする。
（２）（１）の電力伝送回路において、前記第１リアクタンスが持つリアクタンスの大きさが容量性であり、前記１次コイルが持つインダクタンスの大きさよりも大きくなるように設計されていることを特徴とする。
（３）（２）の電力伝送回路において、前記第２リアクタンスはコイルであることを特徴とする。
（４）（１）〜（３）のいずれかの電力伝送回路において、前記電力増幅器の電圧振幅は前記１次側回路から前記２次側回路への送信時に変調されることを特徴とする。
（５）（１）〜（４）の何れかの電力伝送回路を備えることを特徴とする。

In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) In a power transmission circuit that transmits power output from a power amplifier having a constant voltage amplitude using a coil link of a primary side circuit having a primary coil and a secondary side circuit having a secondary coil. The primary side circuit includes the primary coil, a first reactance connected in series to the primary coil, a previous power amplifier, and a second reactance connected in parallel to the power amplifier. The first reactance is designed such that power of the secondary side circuit is the same with respect to a minimum distance and a maximum distance between the primary coil and the secondary coil that are set in advance; Reactance is designed to reduce the power peak of the power amplifier when the distance between the coils changes from the minimum distance to the maximum distance in order to increase the power factor of the power amplifier. And
(2) In the power transmission circuit according to (1), the first reactance is designed so that the reactance is capacitive and larger than the inductance of the primary coil. And
(3) In the power transmission circuit of (2), the second reactance is a coil.
(4) In the power transmission circuit according to any one of (1) to (3), the voltage amplitude of the power amplifier is modulated during transmission from the primary side circuit to the secondary side circuit.
(5) The power transmission circuit according to any one of (1) to (4) is provided.

Claims

In a power transmission circuit for transmitting power output from a power amplifier having a constant voltage amplitude by using a coil link of a primary side circuit having a primary coil and a secondary side circuit having a secondary coil,
The primary circuit is
The primary coil, a first reactance connected in series to the primary coil, a previous power amplifier, and a second reactance connected in parallel to the power amplifier;
The first reactance is designed such that the power of the secondary side circuit is the same with respect to a minimum distance and a maximum distance between the primary coil and the secondary coil that are set in advance .
The second reactance is designed to reduce the power peak of the power amplifier when the distance between the coils changes from the minimum distance to the maximum distance in order to increase the power factor of the power amplifier. Power transmission circuit.

2. The power transmission circuit according to claim 1, wherein the reactance of the first reactance is capacitive and is designed to be larger than the inductance of the primary coil. Transmission circuit.

3. The power transmission circuit according to claim 2, wherein the second reactance is a coil.

4. The power transmission circuit according to claim 1, wherein the voltage amplitude of the power amplifier is modulated during transmission from the primary side circuit to the secondary side circuit.

A visual reproduction assisting device comprising the power transmission circuit according to claim 1.