201136125 六、發明說明： 【發明所屬之技術領域】 本發明係關於具備使電動機所發電之再生電力返回電 源之再生功能的電動機驅動用電源裝置。 【先前技術】 圖5係揭示具備先前之再生功能的電動機驅動用電源 裝置的構造之一例，圖6係揭示圖5所示之先前之電動機驅 動裝置用電源裝置之各部的動作波形的時序圖。在先前的 電源裝置中，對於依三相交流電源之電壓相位的1 20度之 每個區間來構成轉換器之被橋接的電晶體進行切換，使電 動機的再生電力返回電源。在三相交流電源與電動機控制 裝置之間配置電動機驅動用電源裝置，由AC電抗器ACL與 6個電晶體、6個二極體，然後，檢測三相交流電源之相位 的相位檢測電路與驅動6個電晶體的閘極訊號作成電路構 成電源裝置。電動機進行動力運轉時，6個電晶體的閘極 則成爲截止狀態。此時，從三相交流電源輸入之三相交流 電流係經由被並聯連接於6個電晶體之6個二極體，進行三 相全波整流，直流電流被供給至電動機控制裝置。電動機 控制裝置係包含在動力運轉時將直流電流轉換爲交流電流 ，在再生時則將以電動機Μ發電之交流電流，逆轉換爲直 流電流的反相器電路。在再生時，如電力從電動機Μ返回 ，電動機控制裝置之直流部的電壓上升的話，以利用相位 檢測電路檢測出之二相交流電源的相位爲基準，如圖6戶斤 201136125 示’使6個電晶體的閘極依序導通，並使電流流動 交流電源的各相，而使直流部的電力返回三相交流 分別使ό個電晶體導通的區間，關於上側的相（再 成爲正的相）係各相的電源電壓高於其他相的電源 1 20度的區間，關於下側的相（再生電力成爲負的 各相的電源電壓低於其他相的電源電壓之1 20度的 在此先前之電源裝置中，在來自電動機Μ的瞬間再 較大，驅動用電源裝置的電容較小時，無法充分再 此’於日本特開昭62-26 1 92號公報（專利文獻1 )女 示’提案有倂用阻抗再生之再生電力控制裝置20。 所示之裝置20中，對於電源再生電路（9)並聯設 再生電路（13，14)。然後，電動機減速時，反年丨 直流電壓是所定値以下時，使電源再生電路動作而 流電源的電源再生。反相器4的直流電壓是所定値 ，則使電源再生電路與阻抗再生電路雙方動作，以 生與阻抗再生雙方來吸收再生電力。 又，於日本特開平6-62 5 8 4號公報（專利文獻2 示有目的爲抑制再生爲電源之電流的歪曲，具備時 手段的電源裝置。於圖8揭示此公知的電源裝置之 形的時序圖。在此公知的電源裝置中，變更使電晶 導通的區間（參照閘極訊號）。如圖8所示，在此 電源裝置中，時序調整手段係針對對於使再生電流 相較三相的電源電壓中其他相而成爲最大電位及最 的相之電晶體的驅動訊號，從該當相的電位成爲前 於三相 電源。 生電力 電壓之 相）係 區間。 生電力 生。在 口圖7所 在圖7 置阻抗 目器4的 進行交 以上時 電源再 )係揭 序調整 動作波 體成爲 公知的 流動於 小電位 述最大 -6- 201136125 電位之前的時間起，便開始使再生電流流動於該當相之電 晶體的驅動訊號之輸出。然後，時序調整手段係經過該當 相的電位表示三相中最大電位的期間，成爲與另一相的電 位相同電位而之後不表示最大的時間爲止，輸出驅動訊號 。又’時序調整手段係從該當相的電位成爲前述最小電位 之前的時間起，便開始該當相之再生訊號的輸出，經過該 當相的電位表示三相中最小電位的期間，成爲與另一相的 電位相同電位而不表示最小的時間爲止，輸出驅動訊號。 [先前技術文獻] [專利文獻] [專利文獻1 ]日本特開昭6 2 · 2 6 1 9 2號公報 [專利文獻2]日本特開平6-62 5 84號公報 【發明內容】 [發明所欲解決之課題] 在先前之倂用電源再生與阻抗再生的電動機驅動用電 源裝置中，未超過電源再生的容許電力時也倂用阻抗再生 。爲此，並無法有效利用爲了省能源而設置之電源再生。 此因電源再生時流動於電源之電流會受到電源阻抗的影響 ，故在反相器的直流電壓成爲所定値時，也不一定達到電 源再生的容許電力。又，使電動機急遽減速時，陡峭的再 生電力會返回。在此種狀況中，提前使阻抗再生動作而吸 收再生電力爲佳。在此種狀況中，再生電力的吸收太慢的 201136125 話，也可想定反相器直流電壓會上 流過度增大，依據狀況會發出表示 是，如圖8所示，在先前的電源再 控制中，1 2 0度通電區間之兩個電 相同的最大値。爲此，在120度通 形波形超過臨限値之狀況中實施阻 裝置進行高速的阻抗再生動作。 本發明的目的係有鑑於此點所 使用電源再生的容許電力，並且某 之電流的歪曲，並且阻抗再生迅速 電動機驅動用電源裝置。 [用以解決課題之手段] 本發明的電動機驅動用電源裝 、再生阻抗電路、導通訊號產生電 源再生電路之多相父流電壓的相位 多相交流電流的電流檢測器。電源 自多相交流電源的多相交流電流轉 功能、對電動機控制裝置供給直流 電動機控制裝置側再生之再生電力 交換元件的轉換器電路動作而再生 再生功能。再生阻抗電路，係以由 串聯電路所成，設置於電源再生電 藉由使交換電路成爲導通狀態，以 升，而再生爲電源之電 過電流產生之警報。但 生之電流的歪曲之抑制 流的山形波形成爲幾近 電區間之兩個電流之山 抗再生時，無法使電源 發明者，提供最大限度 種程度抑制再生爲電源 動作而不易成過電流的 置係具備電源再生電路 路、檢測出被輸入至電 之相位檢測器及檢測出 再生電路，係具備將來 換爲直流電流的轉換器 電力的整流功能及將從 ，使具備被橋接之複數 爲前述多相交流電源的 再生阻抗與交換電路的 路的直流輸出端子間， 再生阻抗來消耗再生電 -8- 201136125 力之方式構成。導通訊號產生電路，係在再生時，產生用 以使複數交換元件導通的第1導通訊號，與用以使交換電 路成爲導通狀態的第2導通訊號。 在本發明中，在再生時，依據相位檢測器的輸出，將 多相交流電源的多相交流電壓中一相之電壓大於其他相之 電壓的期間及該一相之電壓小於其他相之電壓的期間，界 定爲於該一相中再生再生電力時成爲導通狀態之交換元件 的基本期間。然後，尤其，導通訊號產生電路係以對應基 本期間而產生之一相的電流之初始電流波形的峰値高於之 後產生之電流波形的峰値之方式，產生將半導體交換元件 的導通期間設爲從基本期間開始之前到基本期間結束之前 爲止的第1導通訊號。又，導通訊號產生電路係在多相交 流電流中最大相的交流電流成爲交換元件的容許電流値以 上之預先訂定之基準電流以上的期間，產生使再生阻抗電 路的交換電路成爲導通狀態的第2導通訊號。 依據本發明，導通訊號產生電路爲了電源再生而產生 將半導體交換元件的導通期間設爲從基本期間開始之前到 基本期間結束之前爲止的第1導通訊號時，對應基本期間 而產生之一相的電流之初始電流波形的峰値會高於之後產 生之電流波形的峰値。如此一來，再生爲電源之電流的歪 曲雖然會稍微增加，但是，相較於通常1 2 0度的通電控制 的話，可抑制再生爲電源之電流的歪曲。此外，在最大相 的交流電流成爲交換元件的容許電流値以上之預先訂定之 基準電流以上的期間，產生使再生阻抗電路的交換電路成 201136125 爲導通狀態的第2導通訊號時，可使阻抗再 可利用阻抗再生吸收超過電源再生的再生電 最大限度利用電源再生的容許電力。結果， 不會有主電路的直流電壓變高，電源電流增: 再者，多相交流電源係一般來說是三相 時，電源再生電路，係具備由被橋接之6個 件所成的轉換器電路與被橋接之半導體整流 通訊號產生電路，係在再生時，依據相位檢 將三相交流電源的三相交流電壓中一相之電 相之電壓的期間及該一相之電壓小於其他兩 間，界定爲於該一相中再生再生電力時成爲 個前述交換元件的基本期間時，以對應基牢 一相之電流的初始電流波形之峰値高於之後 形之峰値之方式，產生將兩個半導體交換元 設爲從基本期間開始之前到基本期間結束之 第1導通訊號。 再者’前述基本期間係在電角度上大穿 如此一來’相較於通常1 2 0度的通電控制的 生爲電源之電流的歪曲。 又’基準電流，係被訂定爲藉由再生電 體交換元件損壞之値爲佳。如此一來，可確 交換元件。 【實施方式】 生提前動作， 力。藉此，可 依據本發明， k之狀況。 交流電源。此 半導體交換元 元件。又，導 測器的輸出， 壓大於其他兩 相之電壓的期 導通狀態之兩 期間而產生之 產生的電流波 件的導通期間 前爲止的前述 ' 1 2 0度爲佳。 話，可抑制再 流而防止半導 實保護半導體 -10- 201136125 以下’參照圖面，詳細說明本發明的實施形態之一例 。圖1係揭示本發明之電動機驅動用電源裝置的實施形態 之一例的槪略構造圖。於三相交流電源AC連接有AC電抗 器ACL，於其輸出橋接作爲6個半導體交換元件的電晶體 Trl〜Tr6而構成轉換器電路CV。然後，於6個電晶體Trl〜 Tr6分別並聯連接6個二極體D1〜D6。6個二極體D1〜D6係 構成被橋接之三相整流電路。藉由被橋接之電晶體Trl〜 Tr6與二極體D1〜D6，構成電源再生電路PR。 在轉換器電路CV的直流輸出端子之間，並聯連接有構 成再生阻抗R和交換電路之電晶體Tr7與二極體D7的並聯電 路之串聯電路。此串聯電路構成阻抗再生電路RR。阻抗再 生電路RR係以藉由使電晶體Tr7 (交換電路）成爲導通狀 態，利用再生阻抗R來消耗再生電力之方式構成。 又，在轉換器電路CV的直流輸出端子之間，並聯連接 平流電容器C。於平流電容器C的兩端，連接包含反相器電 路的電動機控制裝置MC。此反相器電路係將直流轉換爲 交流，作爲電動機電流，對三相交流電動機Μ提供所定頻 率的三相交流電流。反相器電路係在電動機Μ減速而成爲 再生狀態時，作爲將電動機Μ發電之交流電流轉換爲直流 電流的轉換器而動作。 於連接於R相、S相及Τ相的AC電抗器ACL的輸出側， 連接有相位檢測器PD。又，於連接於R相及S相的AC電抗 器ACL的輸出側，連接有電流檢測器CD。電流檢測器CD 係檢測R相及S相的交流電流，根據該等交流電流，藉由運 -11 - 201136125 算來求出T相的交流電流，並加以輸出。 電流檢測器c D與相位檢測器p D的輸出係輸入至導通 訊號產生電路SG。導通訊號產生電路SG係在電動機Μ的動 力運轉時及再生時’產生用以使電源再生電路PR中構成轉 換器之6個電晶體Trl〜Tr6導通的複數第1導通訊號s[圖3 (B)的S1〜S6]’與在再生時’產生用以使阻抗再生電路 rr中之電晶體Tr7成爲導通狀態的第2導通訊號S’。在本實 施形態中，在再生時，依據相位檢測器PD的輸出，將從三 相交流電源AC輸出之三相交流電壓中一相之電壓大於其他 相之電壓的期間及該一相之電壓小於其他相之電壓的期間 ，界定爲於該一相中再生再生電力時成爲導通狀態之交換 元件的基本期間T。然後，尤其，導通訊號產生電路SG係 產生將再生時之電晶體Trl〜Tr6的導通期間CT (導通訊號 S1〜S6的訊號幅寬（signal width))設爲從基本期間T開 始之前至基本期間T結束爲止之前的第1導通訊號S1〜S6。 於圖3係針對R相明示基本期間T與導通期間CT。將R相的 電壓大於S相及T相的電壓之期間及R相的電壓小於S相及T 相的電壓之期間，界定爲R相中再生再生電力時成爲導通 狀態之兩個電晶體Tr 1及Tr4的基本期間T。然後，將訂定 該等兩個電晶體Trl及Tr4的導通期間CT之導通訊號S1及S2 的上升相（rising phase) rp設爲基本期間T開始之前，將 導通訊號S1及S2的下降相（falling phase ) fp設爲基本期 間T結束之前爲止。針對對應其他相之電晶體的導通期間 ，也以相同方式訂定。於圖3(B)中，導通訊號S3及S4爲 -12- 201136125 用於S相之兩個電晶體Tr2及Tr5的閘極訊號。又’導通訊 號S5及S6爲用於T相之兩個電晶體Tr3及Tr6的閘極訊號。 導通期間CT係以對應基本期間T而產生之一相（例如R相 )之電流的初始電流波形[例如圖3 ( C )的W 1 ]之峰値P 1高 於之後產生之電流波形[例如圖3 ( C)的W2]之峰値P2之方 式訂定。 導通訊號產生電路SG爲了電源再生而產生前述之第1 導通訊號S 1〜S 6時，對應基本期間T而產生之一相之電流 的初始電流波形W 1之峰値P 1會高於之後產生之*流波形 W2之峰値P2。如此一來，再生爲電源AC之電流的歪曲雖 然會稍微增加，但是，相較於通常1 20度的通電控制的話 ，可抑制再生爲電源AC之電流的歪曲。 又，導通訊號產生電路SG係如圖3(C)所示，在三 相交流電流中最大相的交流電流成爲電晶體Tr 1〜Tr6 (交 換元件）的容許電流値以上之預先訂定之基準電流（ri,-ri )以上的期間，產生使再生阻抗電路RR的電晶體T1·7成爲 導通狀態的第2導通訊號S’[參照圖3 ( D )]。爲了產生第2 導通訊號S’，導通訊號產生電路SG係如圖2所示，具備檢 測三相交流電流中最大相的交流電流的最大値檢測器MD ，與判定最大相的交流電流成爲預先訂定之基準電流（ ri，-ri )以上之期間的比較器CP。如此，在最大相的交流 電流成爲電晶體Tr 1〜Tr6的容許電流値以上之預先訂定之 基準電流（ri，-ri )以上的期間，產生使再生阻抗電路RR 的電晶體Tr7成爲導通狀態的第2導通訊號S’時，相較於先 -13- 201136125 前’可使阻抗再生提前動作’可利用阻抗再生吸收超過電 源再生的再生電力。結果，可最大限度利用電源再生的容 許電力。 以下，使用圖4，簡單說明圖1之實施形態的動作。圖 4係使電動機急遽減速時的動作波形圖。電動機Μ進行動力 運轉時，電晶體Trl〜Tr6的閘極則成爲截止狀態。然後， 從三相交流電源AC，經由被並聯連接於電晶體Trl〜Τι·6的 二極體D 1〜D6，進行三相全波整流，對電動機控制裝置 MC供給電力。電動機Μ成爲減速狀態時，則成爲再生狀態 ，再生電力從電動機Μ返回電源側，電動機控制裝置‘MC之 直流部的電壓會上升[參照圖4 ( C )]。然後，依據以相位 檢測器PD檢測出之三相交流電壓的相位，如圖3 ( Β )， 電晶體Trl〜Tr6係在藉由導通訊號S1〜S6指定之導通期間 ，成爲導通狀態。結果，再生電流使流動於各相而使直流 部的電壓上升之再生電力返回電源AC。如前述般，訂定使 電晶體Trl〜Tr6成爲導通狀態的導通期間CT的話，一相的 電晶體導通之區間相較於先前變得更長，電源再生電流的 120度通電區間之兩個電流的山形波形W1及W2中初始波形 W1的峰値P1會成爲高於之後之波形W2的峰値P2之値。又 ，如圖3 ( C )及圖4 ( B ) ，3相的電源電流內最大電流成 爲臨限値以上，亦即，基準電流（ri，-ri )(電晶體的容許 電流）以上的期間，輸出第2導通訊號S’。此導通訊號S’ 使電晶體Tr7成爲導通狀態的話，再生電流會流動於再生 阻抗R，利用阻抗再生來吸收超過電源再生的再生電力。 -14- 201136125 藉此，可最大限度利用電源再生的容許電力。如圖4 ( D ) 所示，複數第2導通訊號S ’產生之期間’會周期性執行阻 抗再生，流動阻抗再生電流。3相的電源電流中最大電流 小於基準電流（ri,-ri )的話，則不會產生第2導通訊號S， 。結果，之後，僅產生第1導通訊號S1〜S6，僅實施電源 再生而電動機速度會降低。 再者，A C電抗器A C L配置於電流檢測電路的連接點後 方亦可。又，將相位檢測電路PD配置於ACL之前亦可。 如以上所述，依據本實施形態，於並用阻抗再生與電 源再生的電動機驅動用電源裝置中，因爲電源再生時使各 電晶體Trl〜Tr6導通、截止之時機，相較於通常120度通 電控制更提前，故相較於專利文獻2所記載之先前技術， 再生爲電源之電流的歪曲會稍微增加。但是，相較於通常 1 20度的通電控制的話，可抑制再生爲電源之電流的歪曲 。又，可提升出現於〗20度通電區間之兩個電源再生電流 之波形的初始波形之峰値，可更早使阻抗再生動作。藉此 ’不會有主電路之直流電壓上升而電源再生電流增加之狀 況。又，因爲藉由電源再生時之電源電流的大小，控制阻 抗再生’故使用所有電源再生的容許能力後而使阻抗再生 動作’可降低再生阻抗電容，而且可增加省能源效果。 [產業上之利用可能性] 依據本發明，因爲藉由電源再生時之電源電流的大小 ’控制阻抗再生，故使用所有電源再生的容許能力後而進 -15- 201136125 行阻抗再生。結果，可降低再生阻抗的電容，而且可增加 省能源效果。 【圖式簡單說明】 [圖1]揭示本發明之電動機驅動用電源裝置的實施形態 之一例的槪略構造圖。 [圖2]揭示產生第2導通訊號之構造的圖。 [圖3 ]( A )至（D )係揭示圖1之實施形態的各部之動 作波形的圖。 [圖4] (A)至（D)係揭示將電動機急遽減速時之動 作波形的圖。 [圖5]揭示先前電動機驅動用電源裝置之構造的圖。 [圖6]圖6之各部的動作波形圖。 [圖7]揭示先前其他電動機驅動用電源裝置之構造的圖 〇 [圖8]圖7之各部的動作波形圖。 【主要元件符號說明】[Technical Field] The present invention relates to a motor drive power supply device including a regeneration function for returning regenerative electric power generated by a motor to a power source. [Prior Art] Fig. 5 is a view showing an example of a structure of a motor drive power source device having a previous regenerative function, and Fig. 6 is a timing chart showing an operation waveform of each unit of the power supply device for a motor drive device shown in Fig. 5. In the conventional power supply device, the bridged transistors constituting the converter are switched for each section of the voltage phase of the three-phase AC power source by 1 to 20 degrees, and the regenerative electric power of the motor is returned to the power source. A motor drive power supply device is arranged between the three-phase AC power supply and the motor control device, and the AC reactor ACL is combined with six transistors, six diodes, and then the phase detection circuit and the drive for detecting the phase of the three-phase AC power supply. The gate signal of the six transistors is formed into a circuit to constitute a power supply device. When the motor is powered, the gates of the six transistors are turned off. At this time, the three-phase AC current input from the three-phase AC power source is subjected to three-phase full-wave rectification via six diodes connected in parallel to the six transistors, and the DC current is supplied to the motor control device. The motor control device includes an inverter circuit that converts a direct current into an alternating current during power operation and reversely converts an alternating current generated by the motor to a direct current during regeneration. At the time of regeneration, if the electric power is returned from the motor ,, and the voltage of the DC unit of the motor control device rises, the phase of the two-phase AC power source detected by the phase detecting circuit is used as a reference, as shown in Fig. 6 The gate of the transistor is turned on in order, and the current flows to the phases of the AC power source, and the power of the DC portion is returned to the three-phase alternating current, and the phase of the upper transistor is turned on, and the phase on the upper side (which becomes the positive phase again) The power supply voltage of each phase is higher than the range of 20 degrees of the power supply of the other phase, and the phase of the lower side (the power supply voltage of each phase where the regenerative power becomes negative is lower than the temperature of the other phase of the power supply voltage of 1 20 degrees) In the case of the power supply device, when the power is supplied from the motor, the capacitance of the power supply device is small, and it is not possible to fully reproduce the proposal of the Japanese Patent Publication No. 62-26 1 92 (Patent Document 1). There is a regenerative electric power control device 20 for impedance regeneration. In the device 20 shown, a regenerative circuit (13, 14) is provided in parallel with the power regeneration circuit (9). Then, when the motor is decelerating, the reverse is straight. When the voltage is less than or equal to the predetermined voltage, the power regeneration circuit is operated to regenerate the power supply of the power supply. When the DC voltage of the inverter 4 is constant, both the power regeneration circuit and the impedance regeneration circuit are operated, and both the excitation and the impedance regeneration are absorbed. Japanese Laid-Open Patent Publication No. Hei 6-62 5 8 4 (Patent Document 2 discloses a power supply device having a purpose of suppressing distortion of a current regenerated into a power source, and providing a time source means. This known power supply device is disclosed in FIG. A timing chart of the shape. In the known power supply device, a section (refer to a gate signal) that turns on the electron crystal is changed. As shown in Fig. 8, in the power supply device, the timing adjustment means is directed to the regenerative current phase. The driving signal of the transistor which becomes the maximum potential and the most phase among the other phases of the three-phase power supply voltage, the potential from the phase phase becomes the phase before the three-phase power source. The phase of the generated power voltage is generated. Figure 7 is located in Figure 7. When the impedance of the impedance device 4 is crossed, the power supply is again adjusted. The wave is a well-known flow. From the time before the potential of 201136125, the regenerative current starts to flow to the output of the driving signal of the transistor of the phase. Then, the timing adjustment means outputs a drive signal until the maximum potential of the three phases is expressed by the potential of the phase, and becomes the same potential as the potential of the other phase, and then does not indicate the maximum time. Further, the timing adjustment means starts the output of the reproduced signal of the phase from the time before the potential of the phase becomes the minimum potential, and becomes the period of the other phase after the potential of the phase represents the minimum potential of the three phases. The drive signal is output when the potential is the same potential and does not indicate the minimum time. [Patent Document 1] [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. 6-62. Problem to be Solved] In the power supply device for motor drive that used power regeneration and impedance regeneration in the past, impedance regeneration is also used when the allowable power for power regeneration is not exceeded. For this reason, power regeneration that is set to save energy cannot be effectively utilized. Since the current flowing through the power supply during power regeneration is affected by the power supply impedance, the allowable power of the power regeneration is not necessarily achieved when the DC voltage of the inverter is constant. Also, when the motor is suddenly decelerated, the steep regenerative power will return. In such a situation, it is preferable to operate the impedance regenerative operation in advance to absorb the regenerative electric power. In this situation, if the absorption of regenerative power is too slow, 201136125, it can be imagined that the DC voltage of the inverter will increase excessively. According to the situation, it will be expressed, as shown in Figure 8, in the previous power re-control. , the maximum 値 of the two electric powers of the 1 2 0 power-on interval. For this reason, the resistance device is implemented to perform a high-speed impedance regeneration operation in a state where the 120-degree general waveform exceeds the threshold. The object of the present invention is to provide a power supply device for driving a motor, in view of the allowable power of the power regeneration used in this point, and the distortion of a certain current, and the rapid recovery of the impedance. [Means for Solving the Problem] The motor drive power supply, the regenerative impedance circuit, and the communication number of the present invention generate a phase multi-phase AC current phase current detector of the multi-phase parent current voltage of the power regeneration circuit. Power supply The multi-phase AC current transfer function from the multi-phase AC power supply is supplied to the motor control unit to supply the converter circuit of the regenerative power exchange unit that is regenerated by the DC motor control unit to operate the regeneration function. The regenerative impedance circuit is an alarm generated by a series circuit and is provided in the power regeneration circuit to cause the switching circuit to be in an on state to be regenerated to generate an electrical overcurrent generated by the power supply. However, when the mountain-shaped waveform of the suppressed current of the current is reduced to the two currents of the near-electrical zone, the inventor of the power supply cannot provide the maximum degree of suppression of regeneration into a power supply operation and is not easy to overcurrent. The system includes a power regeneration circuit, detects a phase detector that is input to power, and detects a regenerative circuit, and has a rectification function that converts the converter power into a DC current in the future, and has a plurality of bridged components. The regenerative impedance of the AC power supply and the DC output terminal of the circuit of the switching circuit are configured to regenerate the impedance to consume the regenerative power - 8 - 201136125. The communication number generation circuit generates a first communication number for turning on the plurality of switching elements and a second communication number for turning the switching circuit into an ON state during reproduction. In the present invention, during regeneration, according to the output of the phase detector, the period of the voltage of one phase of the multi-phase AC voltage of the multi-phase AC power source is greater than the voltage of the other phase and the voltage of the phase is less than the voltage of the other phase. The period is defined as the basic period of the switching element that is turned on when the regenerative electric power is regenerated in the one phase. Then, in particular, the conduction signal generating circuit generates the conduction period of the semiconductor switching element by setting the peak value of the initial current waveform of the current of one phase corresponding to the basic period to be higher than the peak value of the current waveform generated thereafter. The first communication number from the start of the basic period to the end of the basic period. In addition, the conduction signal generation circuit generates the second phase in which the switching circuit of the regenerative impedance circuit is turned on during a period in which the maximum phase AC current of the multiphase alternating current is equal to or higher than a predetermined current of the allowable current 値 of the switching element. Guide number. According to the present invention, when the conduction period of the semiconductor switching element is set to be the first communication number from the start of the basic period to the time before the end of the basic period, the conduction signal generating circuit generates a current of one phase corresponding to the basic period. The peak value of the initial current waveform will be higher than the peak value of the current waveform generated later. As a result, although the distortion of the current regenerated into the power source is slightly increased, the distortion of the current regenerated into the power supply can be suppressed as compared with the usual energization control of 120 degrees. In addition, when the AC current of the maximum phase is equal to or higher than the predetermined reference current of the switching element, the switching circuit of the regenerative impedance circuit is turned into the second conduction number of 201136125, the impedance can be re-energized. The regenerative power that exceeds the power regeneration can be absorbed by the impedance regeneration to maximize the allowable power of the power regeneration. As a result, there is no DC voltage of the main circuit becoming higher, and the power supply current is increased: In addition, when the multi-phase AC power supply is generally three-phase, the power regeneration circuit has a conversion by the bridged six pieces. The circuit is connected to the bridged semiconductor rectification communication number generating circuit, and during the regeneration, the phase of the electric phase of one phase of the three-phase AC voltage of the three-phase AC power source and the voltage of the one phase are smaller than the other two according to the phase detection. When it is defined as the basic period of the switching element when the regenerative electric power is regenerated in the one phase, the peak value of the initial current waveform corresponding to the current of one phase is higher than the peak value of the subsequent shape, and The two semiconductor switching elements are set to the first communication number from the start of the basic period to the end of the basic period. Further, the aforementioned basic period is greatly increased in electrical angle so as to be a distortion of the current generated by the power supply as compared with the usual energization control of 120 degrees. Further, the "reference current" is preferably determined to be damaged by the regenerative power exchange element. In this way, the components can be exchanged. [Embodiment] Early action, force. Thereby, the condition of k can be in accordance with the present invention. AC power. This semiconductor switching element. Further, the above-mentioned '1 2 0 degrees before the on-period of the current wave generated by the output of the detector and the voltage higher than the period of the other two phases is preferable. In other words, an example of an embodiment of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a schematic structural view showing an example of an embodiment of a power supply device for driving a motor according to the present invention. An AC reactor ACL is connected to the three-phase AC power source AC, and the converter circuit CV is constructed by bridging the transistors Trl to Tr6 which are six semiconductor switching elements. Then, six diodes D1 to D6 are connected in parallel to the six transistors Tr1 to Tr6. The six diodes D1 to D6 constitute a bridged three-phase rectifier circuit. The power regeneration circuit PR is constituted by the bridged transistors Tr1 to Tr6 and the diodes D1 to D6. A series circuit of a parallel circuit of a transistor Tr7 and a diode D7 constituting a regenerative impedance R and a switching circuit is connected in parallel between the DC output terminals of the converter circuit CV. This series circuit constitutes an impedance regeneration circuit RR. The impedance regeneration circuit RR is configured to consume the regenerative electric power by using the regenerative impedance R by turning on the transistor Tr7 (switching circuit). Further, an equalizing capacitor C is connected in parallel between the DC output terminals of the converter circuit CV. At both ends of the smoothing capacitor C, a motor control device MC including an inverter circuit is connected. This inverter circuit converts direct current to alternating current as the motor current and provides a three-phase alternating current of a predetermined frequency to the three-phase alternating current motor. The inverter circuit operates as a converter that converts the alternating current generated by the motor 转换 into a direct current when the motor Μ is decelerated to be in a regenerative state. A phase detector PD is connected to the output side of the AC reactor ACL connected to the R phase, the S phase, and the Τ phase. Further, a current detector CD is connected to the output side of the AC reactor ACL connected to the R phase and the S phase. The current detector CD detects the alternating current of the R phase and the S phase, and based on the alternating current, calculates the alternating current of the phase T by the operation of -11 - 201136125, and outputs it. The output of the current detector c D and the phase detector p D is input to the on-signal generating circuit SG. The pilot signal generation circuit SG generates a plurality of first pilot signals s for turning on the six transistors Tr1 to Tr6 constituting the converter in the power source regenerative circuit PR during power operation and regeneration of the motor [ [Fig. 3 (B) In the case of S1 to S6]' and "at the time of reproduction", the second communication number S' for causing the transistor Tr7 in the impedance regeneration circuit rr to be in an on state is generated. In the present embodiment, during the regeneration, depending on the output of the phase detector PD, the period of the voltage of one phase of the three-phase AC voltage output from the three-phase AC power source AC is greater than the voltage of the other phase and the voltage of the phase is less than The period of the voltage of the other phase is defined as the basic period T of the switching element that is in the on state when the regenerative electric power is regenerated in the one phase. Then, in particular, the pilot signal generating circuit SG generates the ON period CT (signal width of the communication numbers S1 to S6) of the transistors Tr1 to Tr6 during reproduction to be set from the basic period T to the basic period. The first communication numbers S1 to S6 before the end of T. FIG. 3 shows the basic period T and the on period CT for the R phase. The period in which the voltage of the R phase is larger than the voltages of the S phase and the T phase and the voltage of the R phase are smaller than the voltages of the S phase and the T phase is defined as two transistors Tr 1 that are in an on state when the regenerative electric power is regenerated in the R phase. And the basic period T of Tr4. Then, the rising phase rp of the conduction numbers S1 and S2 of the ON periods CT of the two transistors Tr1 and Tr4 is set to be the falling phase of the communication numbers S1 and S2 before the start of the basic period T ( Falling phase ) fp is set before the end of the basic period T. The conduction period for the transistors corresponding to the other phases is also set in the same manner. In Fig. 3(B), the pilot numbers S3 and S4 are -12-201136125 gate signals for the two transistors Tr2 and Tr5 of the S phase. Further, the pilot signals S5 and S6 are gate signals for the two transistors Tr3 and Tr6 of the T phase. During the on-time period, the CT generates an initial current waveform (for example, W 1 of FIG. 3(C)) of the current corresponding to the fundamental period T (for example, the R phase), and the peak 値P 1 is higher than the current waveform generated later [for example, The way of peak 値 P2 of W2] of Fig. 3 (C) is determined. When the first communication number S 1 to S 6 is generated by the pilot signal generation circuit SG for power regeneration, the peak 値 P 1 of the initial current waveform W 1 of the current of one phase corresponding to the basic period T is higher than that after the generation. * The peak of the waveform W2 is 値 P2. As a result, although the distortion of the current regenerated into the power source AC is slightly increased, the distortion of the current regenerated into the power source AC can be suppressed compared to the normal power supply control of 120 degrees. Further, as shown in FIG. 3(C), the pilot signal generation circuit SG is a predetermined reference current in which the maximum phase AC current in the three-phase AC current is equal to or higher than the allowable current 电 of the transistors Tr 1 to Tr6 (switching element). In the period of (ri, -ri) or more, the second pilot communication number S' (see FIG. 3(D)) in which the transistor T1·7 of the regenerative impedance circuit RR is turned on is generated. In order to generate the second pilot communication number S', the pilot signal generating circuit SG is provided with a maximum chirp detector MD for detecting the alternating current of the largest phase among the three-phase alternating currents, and the alternating current of the maximum phase is predetermined. The comparator CP is set for a period of time above the reference current ( ri, -ri ). When the AC current of the maximum phase is equal to or higher than the predetermined reference current (ri, -ri) of the allowable currents 値 of the transistors Tr 1 to Tr6, the transistor Tr7 of the regenerative impedance circuit RR is turned on. In the second communication number S', the regenerative power that exceeds the power regeneration can be absorbed by the impedance regeneration as compared with the first -13-201136125. As a result, the allowable power of the power regeneration can be utilized to the utmost. Hereinafter, the operation of the embodiment of Fig. 1 will be briefly described using Fig. 4 . Fig. 4 is an operation waveform diagram when the motor is rapidly decelerated. When the motor Μ is powered, the gates of the transistors Tr1 to Tr6 are turned off. Then, three-phase full-wave rectification is performed from the three-phase AC power supply AC via the diodes D1 to D6 connected in parallel to the transistors Tr1 to Τ6, and electric power is supplied to the motor control device MC. When the motor Μ is in the deceleration state, it is in the regenerative state, and the regenerative electric power is returned from the electric motor Μ to the power supply side, and the voltage of the DC portion of the motor control device 'MC is increased [refer to Fig. 4 (C)]. Then, based on the phase of the three-phase AC voltage detected by the phase detector PD, as shown in Fig. 3 ( Β ), the transistors Tr1 to Tr6 are turned on during the conduction period designated by the pilot numbers S1 to S6. As a result, the regenerative current returns the regenerative electric power flowing to each phase and increasing the voltage of the direct current portion to the power source AC. As described above, when the conduction period CT in which the transistors Tr1 to Tr6 are turned on is set, the interval in which the transistors of one phase are turned on is longer than that in the previous period, and the two currents in the 120-degree energization interval of the power regeneration current The peak 値 P1 of the initial waveform W1 in the mountain-shaped waveforms W1 and W2 becomes higher than the peak 値 P2 of the waveform W2 that follows. Further, as shown in Fig. 3 (C) and Fig. 4 (B), the maximum current in the three-phase power supply current is equal to or greater than the threshold ,, that is, the period of the reference current (ri, -ri ) (the allowable current of the transistor) or more. , output the second communication number S'. When the transistor Tr7 is turned on, the regenerative current flows to the regenerative impedance R, and the regenerative electric power that exceeds the power source regeneration is absorbed by the impedance regenerative. -14- 201136125 By this, the allowable power for power regeneration can be utilized to the utmost. As shown in Fig. 4 (D), during the period in which the plurality of second communication numbers S ′ are generated, the impedance regeneration is periodically performed, and the flow impedance regenerates the current. If the maximum current of the 3-phase power supply current is less than the reference current (ri, -ri), the second pilot communication number S will not be generated. As a result, only the first pilot communication numbers S1 to S6 are generated, and only the power source regeneration is performed, and the motor speed is lowered. Further, the A C reactor A C L may be disposed after the connection point of the current detecting circuit. Further, the phase detection circuit PD may be disposed before the ACL. As described above, according to the present embodiment, in the motor drive power supply device in which the impedance regeneration and the power regeneration are used in combination, the timing of turning on and off the transistors Tr1 to Tr6 during power regeneration is compared with the normal 120-degree energization control. Further, compared with the prior art described in Patent Document 2, the distortion of the current regenerated into the power source is slightly increased. However, compared with the usual energization control of 20 degrees, the distortion of the current regenerated into the power supply can be suppressed. Further, the peak value of the initial waveform of the waveform of the two power regeneration currents appearing in the 20-degree energization interval can be increased, and the impedance regeneration operation can be performed earlier. Therefore, there is no case where the DC voltage of the main circuit rises and the power regeneration current increases. Further, since the impedance regeneration is controlled by the magnitude of the power supply current during power regeneration, the impedance regenerative operation is performed using the allowable capability of all power regeneration, and the regenerative impedance capacitance can be reduced, and the energy saving effect can be increased. [Industrial Applicability] According to the present invention, since the impedance regeneration is controlled by the magnitude of the power supply current during power regeneration, the impedance of all power regeneration is used, and then the impedance regeneration is performed. As a result, the capacitance of the regenerative impedance can be reduced, and the energy saving effect can be increased. [Brief Description of the Drawings] [Fig. 1] A schematic structural view showing an example of an embodiment of a power supply device for driving a motor according to the present invention. FIG. 2 is a diagram showing a structure for generating a second communication number. [Fig. 3] (A) to (D) are diagrams showing operational waveforms of respective portions of the embodiment of Fig. 1. [Fig. 4] (A) to (D) are diagrams showing an operation waveform when the motor is rapidly decelerated. Fig. 5 is a view showing the configuration of a conventional power supply device for driving a motor. Fig. 6 is an operation waveform diagram of each part of Fig. 6. Fig. 7 is a view showing an operation waveform of each portion of Fig. 8 and Fig. 7 showing a configuration of another conventional motor drive power supply device. [Main component symbol description]
Trl〜Tr7 :電晶體 D1〜D7 :二極體 CV :轉換器電路 MC :電動機控制裝置 Μ =電動機 AC :三相交流電源 -16- 201136125 CD :電流檢測器 P D :相位檢測器 S G :導通訊號產生電路 P R :電源再生電路 RR :阻抗再生電路 -17-Trl~Tr7: Transistor D1~D7: Diode CV: Converter circuit MC: Motor control unit Μ = Motor AC: Three-phase AC power supply-16- 201136125 CD: Current detector PD: Phase detector SG: Communication number Generation circuit PR: power regeneration circuit RR: impedance regeneration circuit -17-