201126861 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種利用電磁感應以非接觸方式進行 機器間之電力傳送的非接觸電力傳送裝置。 【先前技術】 先前已知有一種非接觸電力傳送裝置，對於作為其電 源而内建於例如行動電話或數位相機等之可攜式機器之二 次電池（電池），以非接觸方式進行充電。此裝置中，在可 攜式機器及對應該機器之專用的充電器分別設置用以授受 充電用之電力的一次線圈與二次線圈，藉由該等兩線圈之 電磁感應而從充電器傳送交變電力至可攜式機器，並且在 可攜式機器侧將該交變電力轉換成直流電力以進行二次電 池之充電。 ^在此種非接觸充電中，為人所期望的是：在充電動作 前，先進行充電器與可攜式機器之間是否彼此適合的認 證，以防止誤動作等。對此，例如在專利文獻丨中已揭示： 在從充電器發送交變電力至可攜式機器之際，對該交變電 力以預定頻率進行頻率調變，藉此，將用以認證等的資訊 重疊於交變電力上。然後，可攜式機器會從充電器接收經 頻f調變而發送來的交變電力，並且透過該經頻率調變後 的父變電力之解調而接收上述用以認證等的資訊。 々A如此，若依據專利文獻丨所記載的裝置，則由於用以 認證等的資訊重疊於從充電器發送至可攜式機器的交變電 力上，所以在充電器與可攜式機器之間進行通信上，沒有 201126861 必要設置另外的通信機器，而可謀 [專利文獻1]日本專利公開公報特開雇295。191號 【發明内容】 (發明所欲解決之課題） 然而，專利文獻1所記载的裳置雖秋可謀 ==過此種交變電力之頻率調變及解調3 通信，除了需要電力轉換電路 率調變及解調的專用電路，故盆网 化上自然也有所界限。亦即，扃 八間 裝詈之爐w儿+求作為非接觸電力傳送 裝置之構成上的簡化方面，尚留下改良的餘地。 提供本祕此錄情㈣發完料，其目的在於 3-電力傳送裝置，以非接觸方式進行電力傳 '面纟更間易之構成的基礎下，實現-次線圈與二次 線圈之間的資訊傳遞。 (解決課題之手段） >本發明之第-態樣係一種非接觸電力傳送裝置。該裝 置係具備··譜振電路，其係包含開件；以及電性連^ 於該開^件之-次線圈，透過前述開關元件之切換動 使别述一次線圈感應與該開關元件的導通時間相應的 f變電力，二次線圈，其係位於與前述一次線圈產生之交 變，通交鏈的位置’以非接觸方式從前述—次線圈接收前 述父變電力；一次侧控制裝置，其係進行前述開關元件之 導通/切斷控制，以在前述一次線圈感應前述交變電力，並 且根據應傳遞至前述二次線圈之資訊而變更前述開關元件 的導通時間，藉此調變前述一次線圈所感應的交變電力之 201126861 振幅；以及二次侧控制裝置，其係從對應於前述一次線圈 之交變電力的振幅變化’而於前述二次線圈所接收的交變 電力之振幅的變化中，解調傳遞至前述二次線圈的前述資 訊。 被施加於上述一次線圈的交變電力之特性係與產生該 交變電力的開關元件之切換動作有關，尤其是相關於開關 元件之導通時間，交變電力之振幅發生變化。因此，若根 據上述構成，按照應傳遞至二次線圈的資訊來變更開關元 件的導通時間，藉此就可在一次線圈及二次線圈感應具有 對應該資訊之振幅的交變電力。亦即，交變電力之感應與 該所感應的電力（電壓）之振幅調變可同時進行。藉此，若 解調上述二次線圈所感應的交變電力之振幅變化，以作為 從一次線圈所傳遞來的資訊，則在以非接觸方式進行電力 傳遞時，可在更簡易之構成的基礎下實現於一次線圈與二 次線圈之間的資訊之傳遞，並且，與上述交變電力之傳送 及資訊之傳遞相關的一次側及二次側控制裝置所進行的控 制也會變得容易。 本發明之第二態樣係一種送電電路，其係用以將一次 線圈所感應的電力，以非接觸方式發送至二次線圈。送電 電路係具備.諧振電路，其係包含開關元件；以及電性連 接於邊開關元件之前述一次線圈，透過前述開關元件之切 換動作，使前述一次線圈感應與該開關元件的導通時間相 應的乂變電力；以及一次側控制裴置，其係進行前述開關 元件之導通/切斷控制，以在前述一次線圈感應前述交變電 力，並且根據應傳遞至前述二次線圈之資訊而變更前述開 關元件的導通時間，藉此調變前述一次線圈所感應的交變 201126861 電力之振幅。依據此構成，可提供一種適於上述第一態樣 之非接觸電力傳送裝置的送電電路。 【實施方式】 (第一實施形態） 以下，參照圖1至圖6說明將本發明之非接觸電力傳 送裝置具體化的第一實施形態。此實施形態之裝置係具有 可攜式機器及充電器，該可攜式機器係指具備有作為電源 (負載）之二次電池的數位相機、刮鬍刀、筆記型個人電腦 等，該充電器係以非接觸方式供給電力至該可攜式機器之 二次電池。 首先，如圖1所示，在此非接觸電力傳送裝置中，上 述充電器係搭載有作為產生交變電力之電路的全橋複合諧 振電路10。此全橋複合諧振電路10中，於場效電晶體所 構成的開關元件FET1〜FET4之全橋電路11之中點位置， 連接有可供給交變電力之包含一次線圈L1的諧振電路 12(諧振部）。又，開關元件FET1〜FET4中，分別並聯連接 飛輪二極體D1〜D4。另一方面，上述可攜式機器搭載有二 次側電路20，該二次側電路20係透過二次線圈L2接收藉 由上述全橋複合諧振電路10而於一次線圈L1所感應的交 變電力，且將該所接收的交變電力轉換成直流電力，供給 至既為電源也為負載的二次電池23。 其中，在搭載於充電器的全橋複合諧振電路10中， 藉由微電腦所構成的一次側控制裝置13，使控制電壓（閘極 電壓）經由閘極電阻R1〜R4施加至各開關元件FET1〜 FET4，藉此，進行該等開關元件FET1〜FET4之導通/切斷 201126861 控制。亦即，在同圖1所例示的全橋電路11中，藉由開關 元件FET1及FET4與開關元件FET2及FET3按照上述閘 極電壓交互地導通/切斷，依據隨時從電源E1供給的直流 電力，在上述諧振電路12之一次線圈L1感應交變電力。 亦即’諧振電路10及一次侧控制裝置13係被設計為用以 將一次線圈L1所感應的電力以非接觸方式發送至二次線 圈L2的送電電路。另外，此時透過諧振電路丨2振盪的交 變電力之振盪頻率約為100kHz至200kHz。 然後，藉由此種振盪，使從一次線圈L1產生的交變 磁通交鏈於可攜式機器側之二次線圈L2，藉此使二次線圈 L2接收一次線圈L1所感應的交變電力，且經由該二次線 圈L2 ’將上述充電器產生的電力傳送至可攜式機器。順便 一提’上述諧振電路12中，串聯連接於一次線圈L1的電 容器C1係用於零電流切換動作，故可減低開關元件FET1 〜FET4之切斷時的切換損失。又，並聯連接於一次線圈 L1的電容器C2係用於零電流切換動作，故可減低開關元 件FET1〜FET4之導通時的切換損失。 一方面，經由上述二次線圈L2接收上述交變電力的 二次侧電路20中，於二次線圈L2並聯連接有電容器C3， 用以進行上述全橋複合諧振電路1〇與該二次侧電路20之 阻抗匹配。然後，藉由二次線圈L2接收的交變電力係經由 該電容器C3輸入至由二極體D5〜D8所構成的全波整流電 路21 ’藉由該全波整流電路21全波整流來轉換成直流電 力。此種全波整流電路21之輸出端子21a及21b係分別並 聯連接有平滑用之電容器C4,以及將藉由全波整流電路21 轉換後之直流電力（電壓）予以升壓的DC —DC轉換器22， 201126861 而此經升壓後的電力（電壓)被供給（充電）至作為負載的上 述二次電池23。 、 另一方面，藉由上述全波整流電路21而全波整流後 的直流電力(電壓)，也依序經由二極體D5、電阻元件r5 ^二、C5 ’而被輸人由微電腦所構成的二次側控 Π 24。該二油_裝置24係監視經上述全波 2直流電壓之位準變化、即經上述調變後的振幅變化， 並解調應從上叙充電H側傳遞i 例如由8位4所構成的充電器①之部分。 貝1 一次、====，成， =流電力以非接觸方式發送至可;式::將=4 =器與可攜式機器之間，為人 々 =力供給對象之上述二次電池23進行充電時二= ;該二次電池23的可樓式機器之規格是否適合充電 :格的認證用之資訊。對此，第-實施形態中，透過b 感應的交變電力之振幅，透過上述二次側控制裝忿 ^解調此交變電力之振幅，藉此，騎在充電器與4 機器之間的資訊之傳遞。 w式 以下，參照圖2至圖5說明第一實施形態之上述 元件FET1〜FET4之導通時間的變更態樣。 關 另外，冑2(a)至（d)係顯示將對於開關元件FETi\ FET4之切換動作的一週期之開關元件fet1(fet4)的導 時間與開關元件FET2(FET3)之導通時間合計的導通時= 的比例’亦即導通工作率（工作比：duty ratio)，設為 201126861 =」’日】關元件FET1〜FET4之閘極電壓的推移例。 糸顯不將工作比設為「95%」時，上述一次錄 L1及二次線圈L2所感應的電壓之推 面圈 圖^至⑷係顯示將上述工作比 方^ 元件FET1〜FFT4夕矿 」了谷開關 作比設為「2州^ _#例’®5係顯示將工 „ . ”” 乂」時，上述一次線圈L1及二次線圈L2 感應的電壓之推移例。 固所 首先’如圖2(a)及(d)所示，藉由上述一次侧控制 13 ’上述ji作比設為「95%」的閘極電壓被施加於各^ 元件feT1〜FET4時，時間tl至時間t2的期間，上』 的開關元件FET1及FET4呈導通狀態（期間：tl_t2)。又， 如圖2(b)及(c)所示，在該等開關元件FET1及FET4呈切 狀態後，時間t3至時間t4之期間’上述成對的開關元 FET2及FET3呈導通狀態（期間：t3_t4)。 如此，藉由成對的開關元件FET1及FET4與成對的 開關元件FET2及FET3交互地進行導通/切斷控制，即可 產生對於切換動作的週期T之上述開關元件FET1及FET4 的導通時間（tl —12)與開關元件FET2及FET3之導通時 間（t3 — t4)合計的導通時間的比例，亦即導通工作率（工 作比：duty ratio)為「95%」的脈衝圖樣。 然後，如圖3(b)所示，若進行此種開關元件ρ£τι〜 FET4之導通/切斷控制，則上述諧振電路丨2於該等開關元 件FET1〜FET4之切斷時(期間：t〇_u、t2 — t3、…）错振， 在上述一次線圈L1，以圖3(a)所示的態樣感應電力（電 壓）。該振盪之際，即使一次線圈L1所感應的電壓變得比 上述電源E1之電壓南’亦可藉由並聯連接於開關元件 201126861 FET1〜FET4之上述飛輪二極體D1〜D4，將一次線圈Ll 所感應的電壓定位於電源El之電壓。然後，由於之後成對 的開關元件FET1及FET4、或成對的開關元件FET2及 FET3立刻導通，所以在該期間（期間：tl_t2、t3 —t4、…）， 線圈L1的感應電壓維持於電源El之電壓（ + Vs或一Vs之 電位）。 如此，各開關元件FET1〜FET4之導通時間的工作比 被設定為「95%」時，在一次線圈L1以圖3(a)所示的態樣 感應電壓，且隨之，在二次線圈L2以該電壓一邊顯示相同 傾向一邊稍微衰減之圖3(c)所示的態樣感應電壓。 另一方面，如圖4(a)至（d)所示，若藉由上述一次側控 制裝置13，上述工作比「20%」的閘極電壓被施加於開關 元件FET1〜FET4，例如成對的開關元件FET1及FET4只 會在時間t5至時間t6之期間呈導通狀態。又，同樣地，成 對的開關元件FET2及FET3只會在時間t7至時間t8之期 間呈導通狀態。然後，在除此以外的期間，例如時間t6至 時間t7之期間或時間t8至時間t9之期間，開關元件FET1 〜FET4皆呈切斷狀態。 以此種形式進行開關元件FET1〜FET4之導通/切斷 控制，藉此，如圖5 (a)及(b)中比較一次線圈L1所感應的 電力（電壓）與例如以開關元件FET2為代表而施加於此的 閘極電壓所示，上述諧振電路12係於開關元件之切斷期間 較長的部分持續諧振，並且衰減。亦即，此時，一次線圈 L1所感應的交變電壓之有效值會對應地降低，按照該一次 線圈L1所感應的交變電壓而於上述二次線圈L2所感應的 交變電壓之有效值，與先前的圖3(c)比對，從圖5(c)中可 201126861 知，變成較低的值而能量降低。 對此，在第一實施形態中，一次線圈與設置於二次側 電路20的二次線圈L2電磁耦合時，有鑒於一次線圈L1 及二次線圈L2所感應的交變電力之振幅值會與此種開關 元件FET1〜FET4之導通時間相關而變化，因而根據該振 幅值之變化，進行一次線圈L1與二次線圈L2之間的資訊 傳遞。 圖6係顯示在此種原理之基礎下進行資訊傳遞的該非 接觸電力傳送裝置之資訊傳遞態樣的一例。另外，在該圖 6中，圖6(a)係顯示被施加於開關元件FET1〜FET4之閘極 電壓（控制電壓）的推移例（為了方便說明起見，將時間軸擴 大來圖示）。又，圖6(b)係顯示一次線圈L1所感應的交變 電力之推移例，圖6(c)係顯示二次線圈L2所感應的交變電 力之推移例，圖6(d)係顯示被輸入二次側控制裝置24的直 流電力之電壓值的推移。 亦即，如圖6(a)所示，若將透過上述一次側控制裝置 13之閘極電壓的脈寬調整，上述工作比設為「95%」的 閘極電壓，施加於各開關元件FET1〜FET4，則如圖6(b) 之T1期間所示，一次線圈L1所感應的交變電力（電壓）， 在振幅Ala之基礎下推移。又，此時，如圖6(c)所示，二 次線圈L2中係按照該一次線圈L1所感應的交變電力（電 壓）之振幅Ala而感應振幅A2a之交變電力（電壓）。藉此， 如圖6(d)所示，二次侧控制裝置24中被輸入電壓Va之直 流電壓（圖6(d)之T1期間）。二次側控制裝置24係將該直 流電壓之電壓值Va，與用以識別藉由上述一次側控制裝 置13而設定之閘極電壓的工作比為「95%」及「20%」 12 201126861 中之何者的臨界值Vo比較，根據電壓值Va是否已超過臨 界值Vo之判斷，判定從充電器傳遞來的資訊為邏輯位準 「H」或邏輯位準「L」中之何者。亦即，在T1期間中， 從一次側控制裝置13傳遞來的資訊被判斷為對應工作比 「95%」的邏輯位準「H」。 另一方面，透過上述一次側控制裝置13之閘極電壓 的脈寬調整，上述工作比設為「20%」的閘極電壓被施加 於各開關元件FET1〜FET4時，如圖6(b)之T2期間所示， 一次線圈L1所感應的交變電力衰減，因此，該一次線圈 L1所感應的交變電力（電壓）之振幅從上述振幅Ala朝振幅 Alb降低。又，此時，如圖6(c)所示，二次線圈L2所感應 的交變電力（電壓）之振幅也會隨著一次線圈L1所感應的交 變電力之振幅的降低而從振幅A2a朝振幅A2b降低。藉 此，被輸入於上述二次側控制裝置24的直流電力之電壓 值，也如圖6(d)之T2期間所示，從電壓值Va朝電壓值Vb 降低。然後，如同圖6(d)所示，由於該被輸入的直流電壓 之電壓值Vb低於上述臨界值Vo，因此，二次側控制裝置 24判定在該T2期間中，從一次側控制裝置13傳遞來的資 訊為對應上述工作比「20%」的邏輯位準「L」。 如此，第一實施形態中，藉由變更各開關元件FET1 〜FET4之導通時間（工作比），即可調變一次線圈L1及二 次線圈L2所感應的交變電力（電壓）之振幅，將該經調變後 的振幅藉由上述二次側控制裝置24解調，即可進行上述資 訊之傳遞。另外，第一實施形態中，藉由透過上述導通時 間之變更所進行的交變電力（電壓）之振幅調變，即可將應 從一次線圈L1傳遞至二次線圈L2之資訊調變成例如8位 13 201126861 元之資訊。 如以上說明’依據第一實施形態之非接觸電力傳送裝 置，可獲得以下效果。 (1) 分別由一次線圈L1及二次線圈L2所感應的交變電 力（電壓）之振幅’可按照構成全橋複合諧振電路10之各開 關元件FET1〜FET4之導通時間（工作比）的變化而變化。 利用與該導通時間之變化相應的振幅之變化，進行從一次 線圈L1對二次線圈L2之資訊的傳遞。因此，可同時進行 透過上述各開關元件FET1〜FET4之導通/切斷控制的電力 傳送，以及從一次線圈L1對二次線圈L2之資訊的傳遞。 藉此’以非接觸方式進行電力傳送時，除了可在更簡易之 構成的基礎下實現在一次線圈L1與二次線圈L2之間的資 訊傳遞’並且’也可容易進行上述交變電力之傳送及資訊 之傳遞的控制。 (2) 將設置於充電器的諧振電路，構成為將包含一次線 圈L1的諧振電路12連接於由四個開關元件FET1〜FET4 所構成的全橋電路11之中點位置之全橋複合諧振電路 10。藉此，可更適合地提高透過構成全橋電路Η的開關元 件FET1〜FET4之導通/切斷控制而產生的交變電力之傳送 效率。 (3) 藉由場效電晶體構成上述開關元件FET1〜 FET4。藉此’可更容易實現透過該等開關元件FET1〜FET4 之導通/切斷控制而進行的交變電力之產生以及其振幅之 調變。 (第二實施形態） 以下’參照圖7說明本發明之非接觸電力傳送裝置的 14 201126861 第二實施形態。另外，該第二實施形態係根據應傳遞至二 次線圈L2之資訊變更開關元件FET1〜FET4之導通時間， 將一次線圈L1所感應的交變電力之振幅，從第i振帽值曰調 變成比該第1振幅值還更小的第2振幅值時，將第2振幅 值設定為「G」，而其基本構成係與先前的第—實施形態妓 通。因此，省略該等各要素的重複說明◦另外，第二^包 形態中，上述工作比之變更係在「〇%」與「95%」之間進 行，以將一次線圈L1所感應並進行振幅調變的交變電力之 第2振幅值設為「〇」。 圖7係對應先前的圖6之圖，用以顯示依第二實施形 態之非接觸電力料裝置❿崎的:纽之傳遞態樣的 圖。 亦即’如圖7(a)所示，若透過依據上述一次側控制參 置13之閘極電壓的脈寬調整，上述卫作比設為「9 ^ 閘極電壓被施加於各開關元件FET1〜FET4,則如圖7(b) 之T1期間所示’一次線圈u所感應的交變電力( f振幅AU之基礎下推移。又，此時，如圖7(c)所示，二 次線圈L2中’按照該—次線圈u所感應的交變電力之振 幅Ma而感應振幅A2a之交變電力（電壓）。藉此，如^ 所不’—次側控制裝置24係將該直流電壓之電壓值％， ^用以識別藉由上述—次側控制裝置13 f的工作比為「辦」及，」中之何者的臨界值 電壓值Va是否已超祕界值％之賴，判 充電益傳遞來的資訊為邏輯位準「H」或邏輯位準「L ^何者亦即，在T1期間令，從一次側控制裝置 來的資訊被判斷為對應工作比厂娜」的邏輯位準厂h專遞 15 201126861 另一方面，如上所述，將一次線圈所感應而調變 的交變電力之第2振幅值設為「〇」時，上述工作比係透過 上述一次側控制裝置13之閘極電壓的脈寬調整而設定為 「〇%」°亦即，閘極電壓並未施加於開關元件FET1〜 FET4 ° 因此’如圖7(b)之T2期間所示，一次線圈L1所感應 的交變電力之振幅也會變成「〇」。又，此時，二次線圈^ 所感應的交變電力（電壓）之振幅，也會如圖7(c)所示，同樣 變成「〇」。藉此，被輸入於上述二次側控制裝置24的直流 電壓也會從電壓值Va朝「〇」降低。然後，由於該被輸入 的電壓值（「0」V)比上述臨界值Vo還更低，因此，二次側 控制裝置24係判定在T2期間中，從一次側控制裝置j 3 傳遞來的資訊為對應上述工作比「〇%」的邏輯位準「L」。 如此，第二實施形態中，根據應傳遞至二次線圈乙2 之資訊來變更開關元件FET1〜FET4之導通時間（工作 比）’使一次線圈L1所感應並進行振幅調變的交變電力（電 壓）之第2振幅值變成「0」。換句話說，使一次線圈L1及 二次線圈L2所感應的交變電壓之振幅變成「〇」來進行調 變，且藉由上述二次侧控制裝置24解調該經調變後的振 幅，即可進行上述資訊之傳遞。又，第二實施形態中，由 於使父變電壓之第2振幅值變成「〇」來進行調變，因此， "T將從充電器側對可播式機器侧之上述資訊的傳遞，與用 以對上述二次電池23之供電（充電）的電力之傳送，分開進 行，甚至可藉由最低限的必要電力進行資訊之傳遞。 如以上說明，藉由第二實施形態之非接觸電力傳送裝 置，亦可獲得準同於先前之的第一實施形態之前述（1)至(3) 201126861 的效果’並且更可獲得以下效果。 (4)根據應傳遞至二次線圈[2之資訊而將開關元件 FET1〜FET4之工作比變更成「〇%」，藉此，使交變電力 之振幅變成「G」來進行調變。藉此，可將用以對二次電池 23進行充電的電力之傳送，與從該電力傳送前之充電器對 可攜式機器的資訊之傳遞，分開進行。其結果，由於從充 電器對可穩式機器傳遞資訊時，可不傳送不需要的電力， 所以可根據最低限的必要電力進行資訊之傳遞。 (5)藉由上述導通時間之變更，由於使上述交變電力 (電壓）之振㈣成「〇」來進行調變’所以，按照該導通時 間之變更，-次線圈u所感應的交變電力（電壓）之振幅的 變化幅度會變大。亦即，從圖7⑷可知，被輸人二次侧控 制裝置24的直流電屢，會在電壓值％與「〇」之間變化。 藉此，根據直流Μ之電壓值是否已超過上述臨界值v〇, 而解調從充電器侧傳遞至可攜式機器側之資訊方面，可更 確實地進行該振幅變化之識別（即臨界值v〇之判定），甚至 之基礎下’進行根據交變電力之振幅的 調變及解調之資訊的傳遞。 (第三實施形態） r 第二眘#π铋 十奴升筏賙電力傳送裝置& 線圈另外，該第二實施形態根據應傳遞至二$ :^ /㈣變更㈣元件則〜聰之導通時間 二。應的交變電力之振幅，從第1振幅㈣ 變至比該第丨聽值還更小的第2振幅值時 =言f為該非接觸電力傳送裝置，主要是上 待機時的電力位準1其基本構·與先前㈣—實施形 201126861 態共通。因而，省略該等各要素的重複說明。另外，第= 實施形態中，上述工作比之變更係在「χ%」與「95%」之 間進行(〇<「X」< <95) ’以將一次線圈L1所感應並進行 振幅調變的交變電力之第2振幅值設為上述充電器之待機 時的電力位準。 圖8係對應先前的圖6之圖’用以顯示依第三實施形 態之非接觸電力傳送裝置而進行的資訊之傳遞態樣的時序 圖。 亦即，如圖8(a)所示，若透過依據上述一次側控制裝 置13之閘極電壓的脈寬調整，上述工作比設為「％%」之 閘極電壓被施加於各開關元件FET1〜FET4,則如圖8(b) 之T1期間所示，一次線圈L1所感應的交變電力（電壓）係 在振幅Ala之基礎下推移。又，此時，如圖8(c)所示，二 -人線圈L2中，按照該一次線圈L1所感應的交變電力之振 幅Ala而感應振幅A2a之交變電力（電壓藉此，如圖8(d) 所示’二次側控制裝置24係將該直流電壓之電壓值va， 與用以識別藉由上述一次侧控制裝置13而設定之閘極電 壓的工作比為「95%」及「2〇%」中之何者的臨界值v〇 比較，根據電壓值Va是否已超過臨界值v〇之判斷，判定 從充電器傳遞來的資訊為邏輯位準rH」或邏輯位準r]L」 中之何者。亦即，在T1期間中，從一次側控制裝置13傳 遞來的資訊被判斷為對應工作比「95%」的邏輯位準「H」。 另一方面，如上所述，將一次線圈所感應而調變 的交變電力之第2振幅值設為上述充電器之待機時的電力 位準時，上述工作比係透過上述一次側控制裝置13之閘極 電壓的脈寬調整而設定為rx%」。 201126861 因此，如圖8(b)之丁2期間所示，一次線圈Li中，感 應與上述充電器之待機時的電力位準對應的振幅鳩之交 變電力（電麼）。又，此時，如圖8(c)所示，二次線圈L2中， 按照-次線圈L1所感應的交變電力而感應振幅心之交 變電力(電M)。藉此，被輸人於上述二次側控制裝置24的 直流電壓也會從電壓值Va朝電壓值Vb降低。然後，由於 該被輸入的電壓值Vb比上述臨界值v〇還更低，因此，二 次側控制裝置24係判定在T2期間中，從一次側控制裝； 13傳遞來的資訊為對應上述工作比「χ%」的邏輯位準 「L」。 如此，第二實施形態中，根據應傳遞至二次線圈L2 之資訊來變更開關元件FET1〜FET4之導通時間（工作 比），使一次線圈L1所感應並進行振幅調變的交變電力（電 壓）之第2振幅值變成上述充電器之待機時的電力位準。換 句話說，一次線圈L1及二次線圈L2所感應的交變電壓之 振幅係按照充電器之待機電力位準來調變，且藉由上述二 次侧控制裝置24解調該經調變後的振幅，即可進行上述資 訊之傳遞。 如以上說明，藉由第三實施形態之非接觸電力傳送裝 置，亦可獲得準同於先前的第一實施形態之前述（1)至前述 (3)的效果，並且更可獲得以下效果。 (6)根據應傳遞至二次線圈L2之資訊而將開關元件 FET1〜FET4之工作比變更成「X%」（〇<「X」< <95)， 藉此’使交變電力之振幅變成充電器之待機電力位準來進 行調變。藉此’可將用以對二次電池23進行充電的電力之 傳送’與從該電力傳送前之充電器對可攜式機器的資訊之 19 201126861 傳遞/7開進行。其結果’從充電ii對可攜式機器傳遞資 訊時可不傳送不需要的電力，所以可根據最低限的必要 電力進行資訊之傳遞。 (7)由於交變電力之振幅藉由振幅調變設定為充電器 之待機電力位準，因此，可藉由充電器處於待機狀態時的 最低限之電力位準，進行資訊之傳遞。藉此，更可提高非 接觸電力傳送裝置的實用性。 (其他實施形態） 另外，上述各實施形態，也可以如下的形態來實施。 0 •上述各實施形態中，僅述及從充電器對可攜式機 =、即從一次線圈u對二次線圈L2傳遞充電器ID等之 資訊的情況。但是，在圖〗所例示的裝置中， (a) 可攜式機器亦可更具備基於來自二次側控制裝置 24之指令，調變上述二次線圈L2所感應的交變電力（電壓） 之振幅的電路；以及 (b) 充電器亦可更具備用以抽出二次線圈L2的交變電 力（電壓）之振幅（經調變後的振幅）之變化的電路，並且一次 側控制裝置13亦可具備從該經抽出後的交變電力（電壓）之 振幅變化中，解調在上述可攜式機器側經調變後的資訊之 功能。 藉由此種功能擴充，也可使此等充電器及可攜式機器 具有圖9所例示的相互通信功能。 亦即，如圖9所示，在步驟S101中，若可攜式機器 被設置於充電器時，用以使上述二次側控制裝置24啟動的 電力就會透過一次線圈L1與二次線圈L2之電磁耦合發送 至二次側電路20(步驟S102)。 20 201126861 如此，藉由將發送至二次側電路20的電力供給至二 次側控制裝置24，啟動二次側控制裝置24 (步驟S103)。 然後，藉由該啟動後的二次側控制裝置24，經由二次線圈 L2進行上述調變，用以將表示該二次側控制裝置24已啟 動之意旨的啟動信號，傳遞至一次側控制裝置13。 一次側控制裝置13係將此種調變之啟動信號抽出， 以作為上述一次線圈L1所感應的交變電力（電壓）之振幅變 化，且進行該經抽出後的啟動信號之解調。如此，進行作 為可攜式機器對於充電器之資訊的啟動信號之傳遞（步驟 S104)。 若一次侧控制裝置13(充電器）從二次側控制裝置 24(可攜式機器）接收啟動信號時，則將顯示充電器之規格 等的認證用資訊，例如顯示由8位元所構成的充電器ID之 資訊，以上述之一次線圈L1所感應的交變電力之振幅變 化，從充電器對可攜式機器傳遞（步驟S105)。 若顯示該充電器ID之資訊傳遞至可攜式機器時，則 該資訊藉由上述二次側控制裝置24而解調。透過該解調， 判斷充電器之規格等為適合可攜式機器之規格等的機器， 藉此，藉由經上述二次線圈L2的調變，從可攜式機器對充 電機器傳遞例如顯示由8位元所構成的可攜式機器ID之資 訊，以及顯示允許對該可攜式機器進行充電的意旨之資訊 (充電允許信號）（步驟S106)。 如此，一次側控制裝置13係判斷被設置於充電器的 可攜式機器適合該充電器之規格，對上述二次電池23進行 電力供給(步驟S107)。藉此，可根據一次線圈L1與二次線 圈L2之間的資訊傳遞，準確地進行該等線圈L1及L2間 21 201126861 =之:ΐ可在較高的可靠度下，進行依此種電力 禮，Π 進仃充電從一次線圈L1對二次線圈L2 為非調變練使交㈣力之振㈣成「〇」或成 ϋ接觸電力傳送裝置（充電器）之待機電力位準。因此， 次電池23發送充㈣之電力之前，可歧行根據最 -一<·、必要電力之資訊的傳遞。藉此，可將—次線圈U ^人線圈L2之二次電池23充電用的電力傳送，以及此 ，電力傳送前的資訊之傳遞，分開來騎，甚至可進行根 據最低限的必要電力之資訊的傳遞。 •上述各實施形態以及上述變化例（擴充例）中，雖然 應於-人線圈L1與二次線圈L2之間傳遞之資訊採用由8 位元所構成的資訊，但該資訊之位元數係任意位元數，例 如亦可採用由4位元、或16位元等所構成的資訊。 •上述第一實施形態中，在工作比「95%」與「2〇%」 之間進行各開關元件FET1〜FET4之導通時間的變更。但 不限於此，為了在較高效率之下同時進行資訊之傳遞及電 力之傳送，亦可在例如工作比「95%」與「8〇%」之間進 行各開關元件ΡΈΤ1〜FET4之導通時間的變更。又，此外， 亦可在工作比「50%」與「〇%」之間進行各開關元件FET1 〜FET4之導通時間的變更。要言之，各開關元件FET1〜 FET4之工作比，只要是可攜式機器側能夠識別出相關於各 開關元件FET1〜FET4之導通時間而變化之一次線圈所感 應的交變電力之執行值(振幅）的變化之值即可。 •上述各實施形態以及上述變化例（擴充例）中係採用 22 201126861 場效電晶體作為開關元件FET1〜FET4。此外，亦可採用 各種電力用電晶體，作為構成產生上述交變電力之電路的 開關元件。又，圖1中雖係全部以Nch型電晶體形成開關 元件FET1〜FET4 ’但是亦可以pch型電晶體形成開關元 件FET1、FET3，以]sich型電晶體形成開關元件FET2、 FET4。當然，在此情況下，按照電晶體之極性而適當地變 更閘極電壓。 •上述各實施形態以及上述變化例（擴充例）中，以於 由開關元件組成的全橋電路U之中點位置，連接包含一次 線圈L1之譜振電路’成為全橋複合諧振電路1〇而構成諧 振電路。但不限於此’上述諧振電路10亦可為包含開關元 件，以及電性連接於該開關元件之一次線 圈L1，以產生交 變電力的其他電路構成。例如，諧振電路1G亦可使用單一 開關元件來取代全橋電路u，而使一次線圈Li 電力。 “义 :上述各實施形態以及上述變化例（擴充例）中，將勹 含一次線圈Ll的諧振電路及上述一次側控制裝置13 於充電益，將二次線圈L2及上述二次側控制裳置24 於可攜式機器。但包含一次線圈L1的諧振電路及上述二a 側控制裝4 13之搭載對象、d線圈L2及上述二次= 控制裝置24之搭載對象，並不限於此等充電器或可攜式^ 器。，言之，即使是在不需要攜帶的機器間，只要意^透 過一次線圈L1所感應的交變電力之調變，及/或透過二^ 線圈L2所感應的交變電力之調變，而在一次線圈u與二 次線圈L2之間傳遞各種資訊，均可適用本發明。 、 23 201126861 【圖式簡單說明】 圖1係顯示本發明第—實施㈣的非接 置之構成的電路方境圖。 刀傳史裴 圖2⑷至⑷係_示圖1之非接觸電力傳送農置Φ 、 施加於各開關元件的閘極電壓之推移例的時序圖。’破 圖3(a)係顯示圖丨之非接觸電力傳送裝置中，一 圈所感應的交變電力（電壓）之推移例的時序 ^欠線 被施加於開關树的閘極電壓之推移例的時序圖，(c;，示 不一次線圈所感應的交變電力(電壓)之推移例的時^糸顯 圖4(a)至(d)係顯示圖1之非接觸電力傳送裝置 加於各開關元件的間極電壓之推移例的時序圖。置，破施 圈所Ϊ 示®1 1之非接觸電力傳送裝置中，Kt 的父變電力（電麼）之推移例的時序圖，⑻係g、’_ 開關元件的閘極電壓之推移例的時序圖，（c)係^ ”--二線圈所感應的交變電力(電壓)之推 圖丁、’·、 於各=⑷係顯示圖1之非接觸電力傳送裝d皮施加 :汗f 7〇件的閑極電壓 — 次線圈所咸庙从丄 、…係顯不一 顯示二二變電力（電壓）之推移例的時序圖，⑷係 圖，_: 感應的交變電力(電壓)之推移例的時序 一 不一次線圈所感應的電壓經全波整流並被輸入 ;7巧置的直流電壓之推移例的時序圖。 置，其係顯示本發明第二實施形態的非接觸電力傳送裝 電壓==(a)係顯示該裝置中，被施加於各開關元件的閘極 電力（電严移例的時序圖，（b)係顯示一次線圈所感應的交變 的交變I)之推移例的時序圖，（c)係顯示二次線圈所感應 電力（電壓）之推移例的時序圖，（幻係顯示二次線圈 24 201126861 所感應的電壓經全波整流並被輸入二次側控制裝置的直流 電壓之推移例的時序圖。 圖8係顯示本發明第三實施形態的非接觸電力傳送裝 置，其中⑻係顯示該裝置中，被施加於各開關元件的閘極 電壓之推移例的時序圖，（b)係顯示一次線圈所感應的交變 電力（電壓）之推移例的時序圖，（c)係顯示二次線圈所感應 的交變電力（電壓）之推移例的時序圖，（d)係顯示二次線圈 所感應的電壓經全波整流並被輸入二次側控制裝置的直流 電壓之推移例的時序圖。 1圖9係顯示依變化例之非接觸電力傳送裝置進行的資 訊之傳遞順序及電力之傳送順序之一例的順序圖。 【主要元件符號說明】 10全橋複合諧振電路 11全橋電路 12諧振電路(諧振部） 13 —次側控制裝置 20二次側電路 21全波整流電路 21a、21b輸出端子 22 DC-DC轉換器 23二次電池 24二次側控制裝置BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact power transmission device that performs power transmission between machines in a non-contact manner by electromagnetic induction. [Prior Art] There has been known a contactless power transmission device for charging a secondary battery (battery) of a portable device built in, for example, a mobile phone or a digital camera as its power source in a non-contact manner. In this device, a primary coil and a secondary coil for receiving power for charging are respectively provided in the portable device and a charger dedicated to the device, and the secondary coil is transmitted from the charger by electromagnetic induction of the two coils. The power is converted to a portable machine, and the alternating power is converted to direct current power on the portable machine side to perform charging of the secondary battery. ^ In such non-contact charging, it is desirable to perform authentication between the charger and the portable device before the charging operation to prevent malfunctions. In this regard, for example, in the patent document, it is disclosed that, when the alternating power is transmitted from the charger to the portable device, the alternating power is frequency-modulated at a predetermined frequency, thereby being used for authentication or the like. Information is superimposed on alternating power. Then, the portable device receives the alternating power transmitted by the frequency f modulation from the charger, and receives the information for authentication or the like through the demodulation of the frequency-modulated father variable power. In this case, according to the device described in the patent document, since information for authentication or the like is superimposed on the alternating power transmitted from the charger to the portable device, between the charger and the portable device In the case of the communication, there is no need to provide another communication device in the case of the 201126861. The patent document 1 is disclosed in Japanese Laid-Open Patent Publication No. 295-191 (the content of the invention). However, Patent Document 1 Although the recorded dress is set to fall == the frequency modulation and demodulation 3 communication of such alternating power, in addition to the special circuit that requires power conversion circuit rate modulation and demodulation, the natural network also has some limit. That is to say, there are still room for improvement in the simplification of the composition of the eight non-contact power transmission devices. Providing this secret (4) to complete the material, the purpose is to 3-power transmission device, in the non-contact way to carry out the power transmission on the basis of the composition of the surface, the realization between the secondary coil and the secondary coil Information transfer. (Means for Solving the Problem) > The first aspect of the present invention is a non-contact power transmission device. The device includes a spectral circuit including an opening member, and a secondary coil electrically connected to the opening member, and the switching of the switching element causes the primary coil sensing and the switching element to be turned on. a time-dependent f-variable power, a secondary coil, which is located at an alternating with the primary coil, and the position of the through-link is 'receiving the aforementioned parental power from the aforementioned-secondary coil in a non-contact manner; the primary side control device Performing on/off control of the switching element to induce the alternating power in the primary coil, and changing an on-time of the switching element according to information to be transmitted to the secondary coil, thereby modulating the first coil The 201126861 amplitude of the induced alternating power; and the secondary side control device is a change in the amplitude of the alternating power received by the secondary coil from the amplitude change corresponding to the alternating power of the first coil Demodulating the aforementioned information transmitted to the aforementioned secondary coil. The characteristics of the alternating electric power applied to the primary coil are related to the switching operation of the switching element that generates the alternating electric power, and in particular, the amplitude of the alternating electric power changes in relation to the on-time of the switching element. Therefore, according to the above configuration, the on-time of the switching element is changed in accordance with the information to be transmitted to the secondary coil, whereby the alternating power having the amplitude corresponding to the information can be induced in the primary coil and the secondary coil. That is, the induction of alternating power and the amplitude modulation of the induced power (voltage) can be simultaneously performed. Therefore, by demodulating the amplitude change of the alternating power induced by the secondary coil as the information transmitted from the primary coil, the power can be transmitted in a non-contact manner, and the basis of the configuration can be simplified. The transmission of information between the primary coil and the secondary coil is realized, and the control performed by the primary side and secondary side control devices related to the transmission of the alternating power and the transmission of the information is also facilitated. A second aspect of the present invention is a power transmitting circuit for transmitting power sensed by a primary coil to a secondary coil in a non-contact manner. The power transmission circuit includes a resonant circuit including a switching element, and the primary coil electrically connected to the side switching element, and the switching of the switching element causes the primary coil to sense an on-time of the switching element. And a primary side control device that performs on/off control of the switching element to sense the alternating power in the primary coil and to change the switching element according to information to be transmitted to the secondary coil The turn-on time, thereby modulating the amplitude of the alternating power 201126861 induced by the aforementioned primary coil. According to this configuration, it is possible to provide a power transmission circuit suitable for the non-contact power transmission device of the first aspect described above. [Embodiment] (First Embodiment) Hereinafter, a first embodiment in which a non-contact power transmission device according to the present invention is embodied will be described with reference to Figs. 1 to 6 . The device of this embodiment has a portable device and a charger, and the portable device refers to a digital camera, a razor, a notebook personal computer, and the like having a secondary battery as a power source (load). A secondary battery that supplies power to the portable machine in a non-contact manner. First, as shown in Fig. 1, in the non-contact power transmission device, the above-described charger is equipped with a full-bridge hybrid resonant circuit 10 as a circuit for generating alternating power. In the full-bridge composite resonant circuit 10, a resonant circuit 12 including a primary coil L1 that can supply alternating power is connected to a midpoint of a full-bridge circuit 11 of switching elements FET1 to FET4 formed of a field effect transistor (resonance) unit). Further, flywheel diodes D1 to D4 are connected in parallel to the switching elements FET1 to FET4, respectively. On the other hand, the portable device is equipped with a secondary side circuit 20 that receives the alternating electric power induced in the primary coil L1 by the full-bridge composite resonant circuit 10 through the secondary coil L2. The received alternating power is converted into direct current power, and supplied to the secondary battery 23 which is both a power source and a load. In the full-bridge composite resonant circuit 10 mounted in the charger, the control voltage (gate voltage) is applied to the switching elements FET1 through the gate resistors R1 to R4 by the primary side control device 13 constituted by the microcomputer. The FET 4 is thereby controlled to turn on/off the 201126861 of the switching elements FET1 to FET4. That is, in the full-bridge circuit 11 illustrated in FIG. 1, the switching elements FET1 and FET4 and the switching elements FET2 and FET3 are alternately turned on/off in accordance with the gate voltage, and the DC power supplied from the power source E1 at any time is used. The primary coil L1 of the resonant circuit 12 senses alternating power. That is, the 'resonant circuit 10 and the primary side control device 13 are designed to transmit the power induced by the primary coil L1 to the power transmission circuit of the secondary coil L2 in a non-contact manner. Further, the oscillation frequency of the alternating power oscillated through the resonance circuit 丨2 at this time is about 100 kHz to 200 kHz. Then, by such oscillation, the alternating magnetic flux generated from the primary coil L1 is interlinked to the secondary coil L2 on the portable machine side, whereby the secondary coil L2 receives the alternating electric power induced by the primary coil L1. And the power generated by the above charger is transmitted to the portable machine via the secondary coil L2'. Incidentally, in the above-described resonant circuit 12, the capacitor C1 connected in series to the primary coil L1 is used for the zero current switching operation, so that the switching loss at the time of switching off of the switching elements FET1 to FET4 can be reduced. Further, since the capacitor C2 connected in parallel to the primary coil L1 is used for the zero current switching operation, the switching loss when the switching elements FET1 to FET4 are turned on can be reduced. On the other hand, in the secondary side circuit 20 that receives the alternating power via the secondary coil L2, a capacitor C3 is connected in parallel to the secondary coil L2 for performing the above-described full-bridge composite resonant circuit 1 and the secondary circuit. 20 impedance matching. Then, the alternating power received by the secondary coil L2 is input to the full-wave rectifying circuit 21' constituted by the diodes D5 to D8 via the capacitor C3, and is converted into full-wave rectification by the full-wave rectifying circuit 21 to be converted into DC power. The output terminals 21a and 21b of the full-wave rectifying circuit 21 are respectively connected with a smoothing capacitor C4 and a DC-DC converter for boosting DC power (voltage) converted by the full-wave rectifying circuit 21, respectively. 22, 201126861 The power (voltage) after the boosting is supplied (charged) to the above secondary battery 23 as a load. On the other hand, the DC power (voltage) after full-wave rectification by the full-wave rectifying circuit 21 is also sequentially composed of a microcomputer via a diode D5, a resistance element r5^2, and a C5'. Secondary side control Π 24. The two oil_device 24 monitors the level change of the full-wave 2 DC voltage, that is, the amplitude change after the above modulation, and demodulates the charge from the upper side of the charging H side, for example, the charging consisting of 8 bits 4 Part of the device 1. Bay 1 once, ====, into, = stream power is sent to the non-contact mode; type:: = 4 = between the device and the portable machine, the above secondary battery 23 When charging is performed, two =; whether the specification of the floor-standing machine of the secondary battery 23 is suitable for charging: information for the authentication of the grid. On the other hand, in the first embodiment, the amplitude of the alternating power transmitted through b is transmitted through the secondary side control device to demodulate the amplitude of the alternating power, thereby riding between the charger and the four devices. The transmission of information. W-type Hereinafter, a change of the on-time of the elements FET1 to FET4 of the first embodiment will be described with reference to Figs. 2 to 5 . In addition, 胄2(a) to (d) show the conduction time of the conduction time of the switching element fet1 (fet4) of one cycle for the switching operation of the switching element FETi\FET4 and the conduction time of the switching element FET2 (FET3). The ratio of the time =, that is, the conduction ratio (duty ratio: duty ratio), is set as the transition example of the gate voltage of the elements FET1 to FET4 in the case of 201126861 = "'day]. When the display ratio is not set to "95%", the push-pull pattern of the voltage sensed by the above-mentioned L1 and secondary coils L2 is shown to be the same as the operation of the FET1 to FFT4. When the valley switch ratio is set to "2 states ^ _# example", the display of the voltages induced by the primary coil L1 and the secondary coil L2 is exemplified when the display is performed. As shown in FIGS. 2(a) and 2(d), when the gate voltage of the above-mentioned primary side control 13' is set to "95%" is applied to each of the elements feT1 to FET4, During the period from time t1 to time t2, the upper switching elements FET1 and FET4 are turned on (period: tl_t2). 2(b) and (c), after the switching elements FET1 and FET4 are in a tangential state, the pair of switching elements FET2 and FET3 are turned on during the period from time t3 to time t4 (period :t3_t4). In this way, by performing on/off control by the pair of switching elements FET1 and FET4 and the pair of switching elements FET2 and FET3, the on-times of the switching elements FET1 and FET4 for the period T of the switching operation can be generated ( T1 - 12) The ratio of the on-time of the total of the on-times (t3 - t4) of the switching elements FET2 and FET3, that is, the pulse pattern in which the on-operation ratio (duty ratio) is "95%". Then, as shown in FIG. 3(b), when the on/off control of the switching elements ρ£τι to FET4 is performed, the resonant circuit 丨2 is turned off during the switching elements FET1 to FET4 (period: T〇_u, t2 - t3, ...) is oscillating, and the primary coil L1 senses electric power (voltage) in the state shown in Fig. 3(a). At the time of the oscillation, even if the voltage induced by the primary coil L1 becomes higher than the voltage of the power source E1, the primary coil L1 can be connected by the flywheel diodes D1 to D4 connected in parallel to the switching elements 201126861 FET1 to FET4. The induced voltage is located at the voltage of the power source El. Then, since the pair of switching elements FET1 and FET4 or the pair of switching elements FET2 and FET3 are turned on immediately, during this period (period: tl_t2, t3 - t4, ...), the induced voltage of the coil L1 is maintained at the power source El Voltage (+ Vs or a potential of Vs). As described above, when the operation ratio of the on-time of each of the switching elements FET1 to FET4 is set to "95%", the primary coil L1 induces a voltage in the state shown in FIG. 3(a), and accordingly, in the secondary coil L2. The state induced voltage shown in Fig. 3(c) is slightly attenuated while exhibiting the same tendency with this voltage. On the other hand, as shown in FIGS. 4(a) to 4(d), when the primary side control device 13 is used, the gate voltage of the operation ratio "20%" is applied to the switching elements FET1 to FET4, for example, in pairs. The switching elements FET1 and FET4 are turned on only during the period from time t5 to time t6. Further, similarly, the pair of switching elements FET2 and FET3 are turned on only during the period from time t7 to time t8. Then, during the period other than the period, for example, the period from the time t6 to the time t7 or the period from the time t8 to the time t9, the switching elements FET1 to FET4 are turned off. In this manner, the on/off control of the switching elements FET1 to FET4 is performed, whereby the electric power (voltage) induced by the primary coil L1 is compared with, for example, the switching element FET2 as shown in FIGS. 5(a) and (b). On the other hand, as shown by the gate voltage applied thereto, the resonance circuit 12 is continuously resonated and attenuated in a portion where the switching element is cut off. That is, at this time, the effective value of the alternating voltage induced by the primary coil L1 is correspondingly lowered, and the effective value of the alternating voltage induced in the secondary coil L2 according to the alternating voltage induced by the primary coil L1. Compared with the previous Fig. 3(c), it can be seen from Fig. 5(c) that it can be changed to a lower value and the energy is lowered. On the other hand, in the first embodiment, when the primary coil is electromagnetically coupled to the secondary coil L2 provided in the secondary side circuit 20, the amplitude value of the alternating power induced by the primary coil L1 and the secondary coil L2 is different from Since the on-times of the switching elements FET1 to FET4 are changed in accordance with each other, information transfer between the primary coil L1 and the secondary coil L2 is performed in accordance with the change in the amplitude value. Fig. 6 is a view showing an example of information transmission of the non-contact power transmission device for transmitting information based on such a principle. In Fig. 6, Fig. 6(a) shows an example of transition of the gate voltage (control voltage) applied to the switching elements FET1 to FET4 (the time axis is enlarged for convenience of explanation). 6(b) shows an example of transition of the alternating electric power induced by the primary coil L1, and FIG. 6(c) shows an example of transition of the alternating electric power induced by the secondary coil L2, and FIG. 6(d) shows The transition of the voltage value of the DC power input to the secondary side control device 24 is input. In other words, as shown in FIG. 6(a), when the pulse width of the gate voltage transmitted through the primary side control device 13 is adjusted, the gate voltage having the duty ratio of "95%" is applied to each switching element FET1. In the FET 4, as shown in the period T1 of Fig. 6(b), the alternating electric power (voltage) induced by the primary coil L1 is shifted by the amplitude Ala. Further, at this time, as shown in Fig. 6(c), the secondary coil L2 senses the alternating electric power (voltage) of the amplitude A2a in accordance with the amplitude Ala of the alternating electric power (voltage) induced by the primary coil L1. Thereby, as shown in Fig. 6(d), the DC voltage of the voltage Va is input to the secondary side control device 24 (the period T1 of Fig. 6(d)). The secondary side control device 24 compares the voltage value Va of the DC voltage with the operation ratio for identifying the gate voltage set by the primary side control device 13 as "95%" and "20%" 12 201126861 Which of the threshold values Vo is compared, based on the determination of whether or not the voltage value Va has exceeded the threshold value Vo, it is determined whether the information transmitted from the charger is the logical level "H" or the logical level "L". That is, in the period T1, the information transmitted from the primary side control device 13 is judged to be the logical level "H" corresponding to the "95%" duty ratio. On the other hand, when the gate voltage of the gate ratio of the primary side control device 13 is adjusted, the gate voltage of the operation ratio of "20%" is applied to each of the switching elements FET1 to FET4, as shown in Fig. 6(b). As shown in the period T2, the alternating electric power induced by the primary coil L1 is attenuated, and therefore the amplitude of the alternating electric power (voltage) induced by the primary coil L1 is lowered from the amplitude Ala toward the amplitude Alb. Further, at this time, as shown in FIG. 6(c), the amplitude of the alternating electric power (voltage) induced by the secondary coil L2 also increases from the amplitude A2a in accordance with the decrease in the amplitude of the alternating electric power induced by the primary coil L1. Decreased towards amplitude A2b. As a result, the voltage value of the DC power input to the secondary side control device 24 decreases from the voltage value Va toward the voltage value Vb as shown in the period T2 of Fig. 6(d). Then, as shown in FIG. 6(d), since the voltage value Vb of the input DC voltage is lower than the threshold value Vo, the secondary side control device 24 determines that the primary side control device 13 is in the T2 period. The information transmitted is the logical level "L" corresponding to the above work ratio "20%". As described above, in the first embodiment, by changing the on-time (operation ratio) of each of the switching elements FET1 to FET4, the amplitude of the alternating power (voltage) induced by the primary coil L1 and the secondary coil L2 can be modulated. The amplitude after the modulation is demodulated by the secondary side control device 24, and the above information can be transmitted. Further, in the first embodiment, the information to be transmitted from the primary coil L1 to the secondary coil L2 can be adjusted to, for example, 8 bits by the amplitude modulation of the alternating electric power (voltage) by the change of the conduction time. 13 201126861 Yuan information. As described above, the non-contact power transmission device according to the first embodiment can obtain the following effects. (1) The amplitude 'the amplitude of the alternating electric power (voltage) induced by the primary coil L1 and the secondary coil L2 can be changed according to the on-time (operation ratio) of each of the switching elements FET1 to FET4 constituting the full-bridge composite resonant circuit 10. And change. The transfer of information from the primary coil L1 to the secondary coil L2 is performed by the change in amplitude corresponding to the change in the on-time. Therefore, power transmission through the on/off control of each of the switching elements FET1 to FET4 and transmission of information from the primary coil L1 to the secondary coil L2 can be simultaneously performed. By this means, when the power transmission is performed in a non-contact manner, the information transmission between the primary coil L1 and the secondary coil L2 can be realized on the basis of a simpler configuration, and the above-described alternating power transmission can be easily performed. And the control of the transmission of information. (2) The resonant circuit provided in the charger is configured to connect the resonant circuit 12 including the primary coil L1 to the full-bridge composite resonant circuit at the midpoint of the full-bridge circuit 11 composed of the four switching elements FET1 to FET4. 10. Thereby, the transmission efficiency of the alternating power generated by the on/off control of the switching elements FET1 to FET4 constituting the full bridge circuit 更 can be more suitably improved. (3) The above-described switching elements FET1 to FET4 are formed by field effect transistors. Thereby, the generation of the alternating electric power and the amplitude modulation thereof by the on/off control of the switching elements FET1 to FET4 can be more easily realized. (Second embodiment) Hereinafter, a second embodiment of the non-contact power transmission device according to the present invention will be described with reference to Fig. 7 . Further, in the second embodiment, the on-time of the switching elements FET1 to FET4 is changed in accordance with the information to be transmitted to the secondary coil L2, and the amplitude of the alternating electric power induced by the primary coil L1 is changed from the i-th rim value 曰When the second amplitude value is smaller than the first amplitude value, the second amplitude value is set to "G", and the basic configuration is communicated with the previous first embodiment. Therefore, the overlapping description of each of the elements is omitted. In the second embodiment, the change in the duty ratio is performed between "〇%" and "95%" to induce the amplitude of the primary coil L1. The second amplitude value of the modulated alternating power is set to "〇". Fig. 7 is a view corresponding to the prior Fig. 6 for showing a transfer pattern of the non-contact power device of the second embodiment. That is, as shown in FIG. 7(a), if the pulse width adjustment according to the gate voltage of the primary side control unit 13 is transmitted, the above-described guard ratio is set to "9^ gate voltage is applied to each switching element FET1. ~ FET4, as shown in the period T1 of Fig. 7(b), the alternating power induced by the primary coil u (f amplitude AU is changed. Again, at this time, as shown in Fig. 7(c), twice In the coil L2, 'the alternating power (voltage) of the amplitude A2a is induced according to the amplitude Ma of the alternating electric power induced by the secondary coil u. Thereby, the secondary side control device 24 is the DC voltage. The voltage value %, ^ is used to identify whether the threshold value voltage value Va of the above-mentioned secondary side control device 13 f is "do" and "," The information transmitted by the benefit is the logic level "H" or the logic level "L ^, that is, during the T1 period, the information from the primary side control device is judged to be the logical level of the corresponding work than the factory." h delivery 15 201126861 On the other hand, as described above, the second amplitude value of the alternating power that is induced by the primary coil is modulated. When it is set to "〇", the above operation ratio is set to "〇%" by the pulse width adjustment of the gate voltage of the primary side control device 13. That is, the gate voltage is not applied to the switching elements FET1 to FET4. Therefore, as shown in the period T2 of Fig. 7(b), the amplitude of the alternating electric power induced by the primary coil L1 also becomes "〇". Also, at this time, the alternating electric power (voltage) induced by the secondary coil ^ As shown in Fig. 7(c), the amplitude also becomes "〇", whereby the DC voltage input to the secondary side control device 24 is also lowered from the voltage value Va toward "〇". Since the input voltage value ("0""V is lower than the threshold value Vo, the secondary side control device 24 determines that the information transmitted from the primary side control device j3 is corresponding to the T2 period. The above operation is higher than the logic level "L" of "〇%". Thus, in the second embodiment, the on-time (operation ratio) of the switching elements FET1 to FET4 is changed based on the information to be transmitted to the secondary coil B2. Alternating power that is induced by the primary coil L1 and amplitude-modulated (electrical The second amplitude value of the voltage is "0". In other words, the amplitude of the alternating voltage induced by the primary coil L1 and the secondary coil L2 is changed to "〇", and is modulated by the secondary side control described above. The device 24 can perform the above-described information transmission by demodulating the amplitude after the modulation. In the second embodiment, the second amplitude value of the parent voltage is changed to "〇", and thus the modulation is performed. The transmission of the above information from the charger side to the broadcastable machine side and the transmission of the power for charging (charging) the secondary battery 23 are performed separately, even by the minimum necessary power. As described above, with the non-contact power transmission device of the second embodiment, the effects of the aforementioned (1) to (3) 201126861 of the first embodiment can be obtained, and The following effects can be obtained. (4) The operation ratio of the switching elements FET1 to FET4 is changed to "〇%" based on the information to be transmitted to the secondary coil [2], whereby the amplitude of the alternating power is changed to "G" to be modulated. Thereby, the transmission of electric power for charging the secondary battery 23 can be performed separately from the transmission of information from the charger to the portable machine before the power transmission. As a result, since information is not transmitted from the charger to the stabilized machine, unnecessary power can be transmitted, so that information can be transmitted according to the minimum necessary power. (5) By changing the on-time, the vibration (four) of the alternating electric power (voltage) is modulated by "〇", so the alternating inductance induced by the secondary coil u is changed according to the change of the on-time. The amplitude of the power (voltage) varies greatly. That is, as is clear from Fig. 7 (4), the DC power input to the secondary side control device 24 varies between the voltage value % and "〇". Thereby, according to whether the voltage value of the DC voltage has exceeded the threshold value v〇, and the information transmitted from the charger side to the portable machine side is demodulated, the identification of the amplitude change can be performed more surely (ie, the threshold value) V〇's judgment), or even based on the transmission of information based on the modulation and demodulation of the amplitude of the alternating power. (Third Embodiment) r Second caution #π铋十奴升筏赒Power transmission device & coil In addition, the second embodiment is based on the transmission of two $:^ / (four) changes (four) components to the Cong conduction time two. When the amplitude of the alternating power is changed from the first amplitude (four) to the second amplitude value smaller than the first 丨 listening value, the f is the non-contact power transmission device, and is mainly the power level 1 at the time of standby. Its basic structure is the same as the previous (four)-implementation form 201126861. Therefore, the repeated description of each element is omitted. In addition, in the third embodiment, the change of the above work ratio is performed between "χ%" and "95%" (〇 <X" <<95) The second amplitude value of the alternating electric power induced by the primary coil L1 and amplitude-modulated is set as the electric power level at the time of standby of the charger. Fig. 8 is a timing chart for conveying the information of the non-contact power transmitting device according to the third embodiment, corresponding to the previous Fig. 6'. In other words, as shown in FIG. 8(a), when the pulse width is adjusted in accordance with the gate voltage of the primary side control device 13, the gate voltage at which the duty ratio is "%%" is applied to each switching element FET1. In the FET 4, as shown in the period T1 of FIG. 8(b), the alternating electric power (voltage) induced by the primary coil L1 is shifted by the amplitude Ala. Further, at this time, as shown in FIG. 8(c), in the two-human coil L2, the alternating power of the amplitude A2a is induced in accordance with the amplitude Ala of the alternating electric power induced by the primary coil L1 (the voltage is thereby shown in FIG. 8(d) shows that the secondary side control device 24 sets the voltage value va of the DC voltage to the operation ratio for identifying the gate voltage set by the primary side control device 13 as "95%" and The comparison of the threshold value v〇 of "2〇%" determines whether the information transmitted from the charger is the logic level rH or the logic level r]L according to whether the voltage value Va has exceeded the threshold value v〇. That is, during the period T1, the information transmitted from the primary side control device 13 is determined to be the logical level "H" of the corresponding work ratio "95%". On the other hand, as described above, When the second amplitude value of the alternating power sensed by the primary coil is set to the power level at the standby state of the charger, the duty ratio is set by the pulse width adjustment of the gate voltage of the primary side control device 13. For rx%". 201126861 Therefore, as shown in Figure 8(b), the first line In the circle Li, the alternating power (electricity) of the amplitude 对应 corresponding to the power level at the standby state of the charger is sensed. At this time, as shown in FIG. 8(c), the secondary coil L2 is followed. The alternating electric power induced by the secondary coil L1 induces an alternating power (electricity M) of the amplitude center. Thereby, the DC voltage input to the secondary side control device 24 also changes from the voltage value Va to the voltage value Vb. Then, since the input voltage value Vb is lower than the threshold value v〇, the secondary side control device 24 determines that the information transmitted from the primary side control device 13 is corresponding to the T2 period. The above operation is higher than the logic level "L" of "χ%". In the second embodiment, the on-time (operation ratio) of the switching elements FET1 to FET4 is changed in accordance with the information to be transmitted to the secondary coil L2. The second amplitude value of the alternating power (voltage) induced by the coil L1 and amplitude-modulated becomes the power level at the standby of the charger. In other words, the alternating inductance induced by the primary coil L1 and the secondary coil L2. The amplitude of the voltage is based on the standby power of the charger. The above information can be transmitted by demodulating the modulated amplitude by the secondary side control device 24. As described above, the contactless power transmission device of the third embodiment is used. The effects of the foregoing (1) to (3) of the first embodiment can be obtained, and the following effects can be obtained. (6) The switching element FET1 is switched according to information to be transmitted to the secondary coil L2. ~The work ratio of FET4 is changed to "X%" (〇 <X" <<95), whereby the amplitude of the alternating power is changed to the standby power level of the charger to be modulated. Thereby, the transmission of electric power for charging the secondary battery 23 can be transmitted/released from the information of the charger to the portable machine before the power transmission. As a result, when the information is transmitted from the portable ii to the portable device, unnecessary power is not transmitted, so that the information can be transmitted according to the minimum necessary power. (7) Since the amplitude of the alternating power is set to the standby power level of the charger by the amplitude modulation, the information can be transmitted by the lowest power level when the charger is in the standby state. Thereby, the utility of the non-contact power transmission device can be improved. (Other Embodiments) Further, each of the above embodiments may be implemented as follows. 0. In the above embodiments, only the information from the charger to the portable unit = that is, the information such as the charger ID is transmitted from the primary coil u to the secondary coil L2 will be described. However, in the device illustrated in the figure, (a) the portable device may further have an alternating power (voltage) induced by the secondary coil L2 based on an instruction from the secondary side control device 24. The circuit of the amplitude; and (b) the charger may further include a circuit for extracting a change in the amplitude (modulated amplitude) of the alternating power (voltage) of the secondary coil L2, and the primary side control device 13 The function of demodulating the information modulated on the portable device side from the amplitude change of the extracted alternating current (voltage) may be provided. With such a function expansion, these chargers and portable machines can also have the mutual communication function illustrated in FIG. That is, as shown in FIG. 9, in step S101, if the portable device is installed in the charger, the power for starting the secondary side control device 24 is transmitted through the primary coil L1 and the secondary coil L2. The electromagnetic coupling is transmitted to the secondary side circuit 20 (step S102). In the case of supplying the electric power transmitted to the secondary side circuit 20 to the secondary side control device 24, the secondary side control device 24 is activated (step S103). Then, the secondary side control device 24 after the activation performs the above-described modulation via the secondary coil L2 to transmit an activation signal indicating that the secondary side control device 24 has been activated to the primary side control device. 13. The primary side control device 13 extracts the modulation start signal as the amplitude of the alternating power (voltage) induced by the primary coil L1, and demodulates the extracted activation signal. Thus, the transmission of the activation signal as information of the charger by the portable device is performed (step S104). When the primary side control device 13 (charger) receives the activation signal from the secondary side control device 24 (portable device), the authentication information such as the specification of the charger is displayed, for example, the display is composed of 8-bit units. The information of the charger ID is transmitted from the charger to the portable machine by the amplitude change of the alternating power induced by the primary coil L1 described above (step S105). If the information indicating the charger ID is transmitted to the portable device, the information is demodulated by the secondary side control device 24. Through the demodulation, it is determined that the specification of the charger or the like is a machine suitable for the specifications of the portable device, etc., whereby the transfer of the charging device is performed by the portable machine by the modulation of the secondary coil L2. The information of the portable device ID composed of 8 bits and the information (charge enable signal) indicating the permission to charge the portable device (step S106). In this way, the primary side control device 13 determines that the portable device provided in the charger is suitable for the specification of the charger, and supplies power to the secondary battery 23 (step S107). Thereby, according to the information transmission between the primary coil L1 and the secondary coil L2, the coils L1 and L2 can be accurately performed. 21 201126861 =: ΐ can be performed under high reliability Π Π 仃 仃 从 从 从 从 仃 仃 仃 仃 仃 仃 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Therefore, before the secondary battery 23 sends the charge of the charge (four), it can be discriminated according to the most - <·, the transmission of information about necessary power. Thereby, the power for charging the secondary battery 23 of the secondary coil U^human coil L2 can be transmitted, and the transmission of the information before the power transmission can be separately carried, and even the information according to the minimum necessary power can be performed. Pass. In each of the above embodiments and the above-described variation (extension), the information transmitted between the human coil L1 and the secondary coil L2 is composed of 8-bit information, but the number of bits of the information is For any number of bits, for example, information composed of 4-bit or 16-bit elements may be used. In the first embodiment described above, the on-time of each of the switching elements FET1 to FET4 is changed between "95%" and "2%%". However, the present invention is not limited thereto. In order to simultaneously transmit information and transmit power at a higher efficiency, the on-time of each of the switching elements ΡΈΤ1 to FET4 may be performed between, for example, "95%" and "8%". Changes. Further, it is also possible to change the on-time of each of the switching elements FET1 to FET4 between the operation ratios "50%" and "〇%". In other words, the operation ratio of each of the switching elements FET1 to FET4 is as long as the portable device side can recognize the execution value of the alternating power induced by the primary coil which is changed in relation to the on-time of each of the switching elements FET1 to FET4 ( The value of the change in amplitude can be used. In the above embodiments and the above-described variations (extensions), 22 201126861 field effect transistors are used as the switching elements FET1 to FET4. Further, various types of electric power transistors can be used as the switching elements constituting the circuit for generating the above-described alternating electric power. Further, in Fig. 1, although the switching elements FET1 to FET4' are formed entirely of Nch type transistors, the switching elements FET1 and FET3 may be formed by pch type transistors, and the switching elements FET2 and FET4 may be formed by sich type transistors. Of course, in this case, the gate voltage is appropriately changed in accordance with the polarity of the transistor. In each of the above-described embodiments and the above-described variation (extension), the spectral circuit "including the primary coil L1 is connected to the position of the full-bridge circuit U composed of the switching elements" to become the full-bridge composite resonant circuit 1 Form a resonant circuit. However, the above-described resonant circuit 10 may be configured by a circuit including a switching element and a primary coil L1 electrically connected to the switching element to generate alternating power. For example, the resonant circuit 1G can also use a single switching element instead of the full bridge circuit u to make the primary coil Li power. In the above-described respective embodiments and the above-described variation (expansion), the resonance circuit including the primary coil L1 and the primary-side control device 13 are used for charging, and the secondary coil L2 and the secondary side are controlled to be placed. 24 is a portable device. However, the resonant circuit including the primary coil L1 and the mounting target of the second a-side control device 413, the d-coil L2, and the secondary control device 24 are not limited to these chargers. Or a portable device, in other words, even in a machine that does not need to be carried, as long as the alternation of the alternating power induced by the primary coil L1 and/or the intersection induced by the second coil L2 The present invention can be applied to the modulation of the power, and the various information can be transmitted between the primary coil u and the secondary coil L2. 23 201126861 [Simplified description of the drawings] FIG. 1 shows the non-connection of the first to fourth embodiments of the present invention. Circuit diagram of the configuration. Fig. 2 (4) to (4) show the timing diagram of the example of the transition of the gate voltage applied to each switching element in Fig. 1 . a) shows the non-contact electricity of the figure In the transmission device, the timing of the transition of the alternating power (voltage) induced by one revolution is applied to the timing diagram of the transition of the gate voltage of the switch tree, (c; indicating that the coil is not sensed by the primary coil) 4(a) to (d) are timing charts showing an example of transition of the interpole voltage applied to each switching element by the non-contact power transmission device of Fig. 1. In the non-contact power transmission device of the ®1 1 , the timing chart of the shifting example of the power of the father of Kt (electricity), (8) is the example of the change of the gate voltage of the switching element. Timing diagram, (c) system ^ "--the two-coil induced alternating power (voltage) push graph, '·, in each = (4) shows the non-contact power transmission package of Figure 1 application: sweat f The idle voltage of 7 — — — 次 次 次 咸 咸 咸 咸 咸 咸 咸 咸 咸 咸 咸 次 次 次 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序 时序The timing of the transition example is that the voltage induced by the coil is rectified by full-wave rectification and input; A timing chart showing a non-contact power transmission device voltage according to a second embodiment of the present invention == (a) shows a gate power applied to each switching element in the device (a timing chart of an example of electrical strictness shift) (b) is a timing chart showing an example of the transition of the alternating transition I) induced by the primary coil, and (c) is a timing chart showing an example of the transition of the electric power (voltage) induced by the secondary coil, (phantom display) A timing chart in which the voltage induced by the secondary coil 24 201126861 is full-wave rectified and input to the DC voltage of the secondary side control device. Fig. 8 is a view showing a non-contact power transmission device according to a third embodiment of the present invention, wherein (8) A timing chart showing an example of transition of a gate voltage applied to each switching element in the device, and (b) is a timing chart showing an example of transition of alternating power (voltage) induced by the primary coil, and (c) A timing chart showing an example of transition of alternating electric power (voltage) induced by the secondary coil, and (d) shows a transition example in which the voltage induced by the secondary coil is full-wave rectified and input to the DC voltage of the secondary side control device. Timing diagramFig. 9 is a sequence diagram showing an example of the order of transmission of information and the order of transmission of power by the non-contact power transmission device according to the modification. [Description of main component symbols] 10 full-bridge composite resonant circuit 11 full-bridge circuit 12 resonant circuit (resonant) 13 - secondary side control device 20 secondary side circuit 21 full-wave rectifying circuit 21a, 21b output terminal 22 DC-DC converter 23 secondary battery 24 secondary side control device
Ala、Alb、A2a、A2b 振幅Ala, Alb, A2a, A2b amplitude
Cl〜C5 電容器 D1〜D4 飛輪二極體 25 201126861 D5〜D9 二極體 El 電源 FET1〜FET4 開關元件 L1 一次線圈 L2二次線圈 R1〜R4 閘極電阻 R5、R6 電阻元件 Vo 臨界值Cl~C5 Capacitor D1~D4 Flywheel diode 25 201126861 D5~D9 Diode El Power FET1~FET4 Switching element L1 Primary coil L2 Secondary coil R1~R4 Gate resistance R5, R6 Resistance element Vo Threshold value