JPH069344U - Uninterruptible AC-DC converter - Google Patents
Uninterruptible AC-DC converterInfo
- Publication number
- JPH069344U JPH069344U JP4745292U JP4745292U JPH069344U JP H069344 U JPH069344 U JP H069344U JP 4745292 U JP4745292 U JP 4745292U JP 4745292 U JP4745292 U JP 4745292U JP H069344 U JPH069344 U JP H069344U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- load
- power supply
- battery
- commercial power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- Stand-By Power Supply Arrangements (AREA)
- Rectifiers (AREA)
Abstract
(57)【要約】
【目的】 商用電源の正常時は、該商用電源の交流電力
をダイオード式順変換回路１１によって直流電力に変換
して負荷に供給し、商用電源の停電時はバッテリ５の直
流電力を前記負荷に供給する無停電式ＡＣ−ＤＣコンバ
ータにおいて、複雑なＡＶＲ機能を有した回路を設けな
くても、直流出力電圧を負荷設備の許容入力電圧範囲内
に制御することができるようにする。
【構成】 商用電源とダイオード式順変換回路１１の間
に、入出力電圧のマッチングをとるトランス２０を設
け、バッテリ５の放電初期電圧を前記負荷設備の許容電
圧の上限値以下に選定するとともに、放電末期電圧を前
記負荷設備の許容電圧の下限値以上に選定しておき、前
記商用電源電圧が前記負荷設備の許容電圧の下限値以下
に低下したとき、前記バッテリ５を放電させて出力電圧
を負荷設備の許容電圧範囲内に保つ。
(57) [Abstract] [Purpose] When the commercial power supply is normal, the AC power of the commercial power supply is converted to DC power by the diode-type forward conversion circuit 11 and supplied to the load. In an uninterruptible AC-DC converter that supplies DC power to the load, a DC output voltage can be controlled within an allowable input voltage range of load equipment without providing a circuit having a complicated AVR function. To [Structure] A transformer 20 for matching input and output voltages is provided between a commercial power source and a diode-type forward conversion circuit 11, and an initial discharge voltage of a battery 5 is selected to be equal to or lower than an upper limit value of an allowable voltage of the load facility. The end-of-discharge voltage is selected to be equal to or higher than the lower limit value of the allowable voltage of the load facility, and when the commercial power supply voltage drops below the lower limit value of the allowable voltage of the load facility, the battery 5 is discharged to change the output voltage. Keep within the allowable voltage range of the load equipment.
Description
【０００１】[0001]
本考案は無停電電力変換装置に係り、特に無停電式ＡＣ−ＤＣコンバータに関 する。 The present invention relates to an uninterruptible power converter, and particularly to an uninterruptible AC-DC converter.
【０００２】[0002]
現在、コンピュータ等の常時電力供給を必要とする負荷設備には、バッテリと ＣＶＣＦ（定電圧定周波数電力変換装置）を組み合わせた無停電電源装置（ＵＰ Ｓ）が用いられている。出力が交流方式の無停電電源装置は負荷設備が交流入力 式であれば最適である。また負荷設備が直流入力方式の時は無停電式ＡＣ−ＤＣ コンバータが最適である。 Currently, an uninterruptible power supply (UPS), which is a combination of a battery and a CVCF (constant voltage / constant frequency power converter), is used for load equipment such as a computer that requires constant power supply. The AC output uninterruptible power supply is optimal if the load equipment is an AC input type. When the load equipment is of the DC input type, the uninterruptible AC-DC converter is most suitable.
【０００３】 従来の無停電式ＡＣ−ＤＣコンバータの基本回路は図４、図５のように構成さ れている。図４において、１は商用電源の交流電力を直流電力に変換するサイリ スタ式順変換回路である。サイリスタ式順変換回路１の直流出力は直流リップル 平滑用リアクトル２、直流リップル平滑用コンデンサ３で平滑されて負荷（図示 省略）に供給される。４は商用電源の交流電力を直流に変換してバッテリ５に充 電したり、商用電源停電時にバッテリ５の電荷を放電させる充放電回路である。 ６はバッテリ５の放電時の直流出力を一定にする直流出力一定回路である。図４ の回路では、入力電圧変動については自動電圧調整（ＡＶＲ）機能によりサイリ スタ式順変換回路１を制御し直流出力電圧を一定にしている。また商用電源停電 時は充放電回路４でバッテリ５を放電させ、直流出力一定回路６により直流出力 電圧を一定にしている。A basic circuit of a conventional uninterruptible AC-DC converter is configured as shown in FIGS. 4 and 5. In FIG. 4, reference numeral 1 is a thyristor-type forward conversion circuit that converts AC power of a commercial power supply into DC power. The DC output of the thyristor-type forward conversion circuit 1 is smoothed by a DC ripple smoothing reactor 2 and a DC ripple smoothing capacitor 3 and supplied to a load (not shown). Reference numeral 4 denotes a charging / discharging circuit that converts AC power of the commercial power supply into DC power to charge the battery 5, and discharges electric charge of the battery 5 when the commercial power supply fails. Reference numeral 6 is a DC output constant circuit that makes the DC output constant when the battery 5 is discharged. In the circuit shown in FIG. 4, the input voltage fluctuation is controlled by the automatic voltage adjustment (AVR) function of the thyristor type forward conversion circuit 1 to keep the DC output voltage constant. When the commercial power supply fails, the charging / discharging circuit 4 discharges the battery 5 and the DC output constant circuit 6 keeps the DC output voltage constant.
【０００４】 また図５において１１は商用電源の交流電力を直流電力に変換するダイオード 式順変換回路（３相ブリッジ整流回路）である。ダイオード式順変換回路１１の 直流出力は直流リップル平滑用リアクトル２、直流リップル平滑用コンデンサ３ で平滑されて負荷（図示省略）に供給される。１４は前記平滑された直流電力を バッテリ５に充電したり、商用電源停電時にバッテリ５の電荷を放電させる充放 電回路である。１６は商用電源運転時の直流出力またはバッテリ５の放電時の直 流出力を一定にする直流出力一定回路である。図５の回路では、入力電圧変動に ついては直流出力一定回路１６で直流出力電圧を一定にしている。また商用電源 停電時は充放電回路１４でバッテリ５を放電させ、直流出力一定回路１６で直流 出力電圧を一定にしている。Reference numeral 11 in FIG. 5 is a diode-type forward conversion circuit (three-phase bridge rectification circuit) for converting AC power of a commercial power supply into DC power. The DC output of the diode-type forward conversion circuit 11 is smoothed by the DC ripple smoothing reactor 2 and the DC ripple smoothing capacitor 3 and supplied to a load (not shown). Reference numeral 14 denotes a charging / discharging circuit that charges the battery 5 with the smoothed DC power or discharges the electric charge of the battery 5 when the commercial power source fails. Reference numeral 16 is a DC output constant circuit for making the DC output during the operation of the commercial power source or the DC output during the discharge of the battery 5 constant. In the circuit of FIG. 5, the DC output constant circuit 16 keeps the DC output voltage constant with respect to the input voltage fluctuation. Further, during a power failure of the commercial power supply, the battery 5 is discharged by the charge / discharge circuit 14, and the DC output voltage is made constant by the DC output constant circuit 16.
【０００５】[0005]
前記図４の回路方式では、直流電圧を一定にする自動電圧調整（ＡＶＲ）機能 を有した回路を２回路設ける必要があり、また図５の回路方式でも自動電圧調整 （ＡＶＲ）機能を有した回路を１回路設ける必要がある。通常、負荷設備は直流 入力電圧が±１０％程度変化しても何等問題ないように製作されているので、こ れらＡＶＲ機能は非常に不経済であり、また複雑となるため信頼性も低下する。 In the circuit system of FIG. 4, it is necessary to provide two circuits having an automatic voltage adjustment (AVR) function for making the DC voltage constant, and the circuit system of FIG. 5 also has an automatic voltage adjustment (AVR) function. It is necessary to provide one circuit. Usually, the load equipment is manufactured so that there is no problem even if the DC input voltage changes by about ± 10%, so these AVR functions are very uneconomical and complicated, and the reliability decreases. To do.
【０００６】 本考案は上記の点に鑑みてなされたものでその目的は、複雑なＡＶＲ機能を有 した回路を設けなくても、直流出力電圧を負荷設備の許容入力電圧範囲内に制御 することができる無停電式ＡＣ−ＤＣコンバータを提供することにある。The present invention has been made in view of the above points, and an object thereof is to control a DC output voltage within an allowable input voltage range of load equipment without providing a circuit having a complicated AVR function. An object of the present invention is to provide an uninterruptible AC-DC converter.
【０００７】[0007]
本考案は、商用電源の正常時は、該商用電源の交流電力を直流電力に変換して 負荷に供給し、商用電源の停電時はバッテリの直流電力を前記負荷に供給する無 停電式ＡＣ−ＤＣコンバータにおいて、商用電源の交流電力を入力とし、入出力 電圧のマッチングをとるトランスと、前記トランスの出力電圧を整流する整流回 路と、前記整流回路の出力を平滑した直流電力を入力とし、放電初期電圧が前記 負荷設備の許容電圧の上限値以下であり、放電末期電圧が前記負荷設備の許容電 圧の下限値以上であるバッテリとを備え、前記商用電源電圧が前記負荷設備の許 容電圧の下限値以下に低下したとき、前記バッテリを放電させて出力電圧を負荷 設備の許容電圧範囲内に保つことを特徴としている。 The present invention is an uninterruptible AC-type converter that converts AC power of the commercial power supply to DC power and supplies it to the load when the commercial power supply is normal, and supplies DC power of the battery to the load when the commercial power supply fails. In a DC converter, AC power of a commercial power source is input, a transformer that matches input and output voltages, a rectifier circuit that rectifies the output voltage of the transformer, and DC power that smooths the output of the rectifier circuit are input. A battery whose initial discharge voltage is equal to or lower than the upper limit value of the allowable voltage of the load facility and whose end-of-discharge voltage is equal to or higher than the lower limit value of the allowable voltage of the load facility, and the commercial power supply voltage is the allowable voltage of the load facility. When the voltage drops below the lower limit value, the battery is discharged to keep the output voltage within the allowable voltage range of the load equipment.
【０００８】[0008]
いま負荷設備の許容電圧範囲が±１０％であるとする。入出力電圧のマッチン グがトランスによってとられているので、商用電源の入力電圧が±１０％変動す れば、装置の直流出力電圧（負荷に供給される電圧）も±１０％変動するが、こ の変動は前記許容電圧範囲内であるので何等問題はない。商用電源の入力電圧が −１０％以上変化した場合は、バッテリが放電されて出力電圧は±１０％以内に 保たれる。 Now, assume that the allowable voltage range of the load equipment is ± 10%. Since the matching of the input and output voltage is taken by the transformer, if the input voltage of the commercial power supply fluctuates ± 10%, the DC output voltage of the device (voltage supplied to the load) also fluctuates ± 10%. Since this variation is within the allowable voltage range, there is no problem. When the input voltage of the commercial power supply changes by -10% or more, the battery is discharged and the output voltage is kept within ± 10%.
【０００９】 バッテリ電圧は放電によって変化するが、放電初期電圧が前記負荷設備の許容 電圧の上限値以下であり、放電末期電圧が前記負荷設備の許容電圧の下限値以上 であるバッテリを用いているので、直流出力電圧を負荷設備の許容電圧範囲内に 保つことができる。Although the battery voltage changes due to discharge, a battery whose initial discharge voltage is equal to or lower than the upper limit value of the allowable voltage of the load facility and whose final discharge voltage is equal to or higher than the lower limit value of the allowable voltage of the load facility is used. Therefore, the DC output voltage can be kept within the allowable voltage range of the load equipment.
【００１０】 上記のように自動電圧調整（ＡＶＲ）機能を有した回路が不要となって非常に 経済的であり、信頼性も向上する。As described above, a circuit having an automatic voltage adjustment (AVR) function is not required, which is very economical and reliability is improved.
【００１１】[0011]
以下図面を参照しながら本考案の一実施例を説明する。図１において図５と同 一部分は同一符号を以て示している。図１において図５と異なる点は、直流出力 一定回路１６を除去し、ダイオード式順変換回路１１と商用電源（図示省略）を 結ぶ電路に、交流入力電圧と直流出力電圧を適合させるトランス２０を介挿した ことにあり、その他の部分は図５と同一に構成されている。 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same parts as those in FIG. 5 are designated by the same reference numerals. 1 is different from FIG. 5 in that the DC output constant circuit 16 is removed, and a transformer 20 that adapts the AC input voltage and the DC output voltage to a circuit connecting the diode type forward conversion circuit 11 and a commercial power supply (not shown). The other parts are configured the same as in FIG.
【００１２】 上記のように構成された装置の交流入力電圧と直流出力電圧の関係は図２のよ うに示される。トランス２０は装置の入力電圧、出力電圧の仕様に適合するよう に電圧マッチングを調整する。したがって入力電圧が±１０％変動すれば直流出 力電圧も±１０％変動する（図２に示す商用運転領域）。また交流入力電圧が− １０％以上変化した時は、バッテリ５を放電させて出力電圧を±１０％以内にす る（図２に示すバッテリ運転領域）。The relationship between the AC input voltage and the DC output voltage of the device configured as described above is shown in FIG. The transformer 20 adjusts the voltage matching so as to meet the specifications of the input voltage and the output voltage of the device. Therefore, if the input voltage fluctuates by ± 10%, the DC output voltage also fluctuates by ± 10% (commercial operation area shown in Fig. 2). When the AC input voltage changes by -10% or more, the battery 5 is discharged to bring the output voltage to within ± 10% (battery operating range shown in Fig. 2).
【００１３】 ここでバッテリ５は、放電すると図３の特性図のようにバッテリ電圧が変化す る。そこでバッテリ５は、初期放電時に出力電圧定格の＋１０％以内になるよう にし、放電末期では定格出力電圧の−１０％以内になるように、電圧、容量を選 定しておく。また負荷設備が±２０％まで許容できる場合は、初期放電時に＋２ ０％以内、放電末期時に−２０％になるようにバッテリ５の電圧、容量を選定す ればよい。この場合、放電開始時期は交流入力電圧が−２０％になった時点でよ い。Here, when the battery 5 is discharged, the battery voltage changes as shown in the characteristic diagram of FIG. Therefore, the voltage and capacity of the battery 5 are selected so that the output voltage is within + 10% of the rated output voltage during initial discharge and within -10% of the rated output voltage at the end of discharge. Further, when the load equipment can tolerate up to ± 20%, the voltage and capacity of the battery 5 may be selected so that it is within + 20% at the initial discharge and −20% at the end of discharge. In this case, the discharge start time may be when the AC input voltage reaches -20%.
【００１４】[0014]
以上のように本考案によれば入力と出力の電圧マッチングをトランスで行うと ともに、バッテリ電圧の選定を、初期放電時のバッテリ電圧≦負荷設備が許容で きる電圧の上限値、末期放電時のバッテリ電圧≧負荷設備が許容できる電圧の下 限値としたので、自動電圧調整（ＡＶＲ）機能をが不要となって経済的となると ともに、装置の信頼性が向上する。 As described above, according to the present invention, the input and output voltage matching is performed by the transformer, and the battery voltage is selected such that the battery voltage during initial discharge ≤ the upper limit value of the voltage allowed by the load equipment, Since the battery voltage ≥ the lower limit value of the voltage that the load equipment can tolerate, the automatic voltage adjustment (AVR) function is not required, which is economical and the reliability of the device is improved.
【図１】本考案の一実施例を示す回路図。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
【図２】実施例の回路による商用電源変動時の入出力電
圧関係を示す特性図。FIG. 2 is a characteristic diagram showing a relationship between input and output voltages when a commercial power supply fluctuates by the circuit of the embodiment.
【図３】実施例の回路によるバッテリ運転時の直流出力
と時間の関係を示す特性図。FIG. 3 is a characteristic diagram showing a relationship between DC output and time during battery operation by the circuit of the embodiment.
【図４】従来の無停電式ＡＣ−ＤＣコンバータの一例を
示す回路図。FIG. 4 is a circuit diagram showing an example of a conventional uninterruptible AC-DC converter.
【図５】従来の無停電式ＡＣ−ＤＣコンバータの他の例
を示す回路図。FIG. 5 is a circuit diagram showing another example of a conventional uninterruptible AC-DC converter.
５…バッテリ １１…ダイオード式順変換回路 １４…充放電回路 ２０…トランス 5 ... Battery 11 ... Diode type forward conversion circuit 14 ... Charge / discharge circuit 20 ... Transformer
Claims (1)
電力を直流電力に変換して負荷に供給し、商用電源の停
電時はバッテリの直流電力を前記負荷に供給する無停電
式ＡＣ−ＤＣコンバータにおいて、 商用電源の交流電力を入力とし、入出力電圧のマッチン
グをとるトランスと、前記トランスの出力電圧を整流す
る整流回路と、前記整流回路の出力を平滑した直流電力
を入力とし、放電初期電圧が前記負荷設備の許容電圧の
上限値以下であり、放電末期電圧が前記負荷設備の許容
電圧の下限値以上であるバッテリとを備え、 前記商用電源電圧が前記負荷設備の許容電圧の下限値以
下に低下したとき、前記バッテリを放電させて出力電圧
を負荷設備の許容電圧範囲内に保つことを特徴とする無
停電式ＡＣ−ＤＣコンバータ。1. An uninterruptible AC for converting the AC power of the commercial power supply to DC power and supplying it to the load when the commercial power supply is normal, and supplying the DC power of the battery to the load when the commercial power supply fails. -In a DC converter, AC power of a commercial power supply is input, a transformer that matches input and output voltages, a rectifier circuit that rectifies the output voltage of the transformer, and DC power that smooths the output of the rectifier circuit are input, The discharge initial voltage is equal to or lower than the upper limit value of the allowable voltage of the load equipment, and the discharge terminal voltage is provided with a battery equal to or higher than the lower limit value of the allowable voltage of the load equipment, and the commercial power supply voltage is the allowable voltage of the load equipment. An uninterruptible AC-DC converter characterized in that, when the voltage drops below a lower limit, the battery is discharged to maintain an output voltage within an allowable voltage range of load equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4745292U JPH069344U (en) | 1992-07-08 | 1992-07-08 | Uninterruptible AC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4745292U JPH069344U (en) | 1992-07-08 | 1992-07-08 | Uninterruptible AC-DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH069344U true JPH069344U (en) | 1994-02-04 |
Family
ID=12775551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4745292U Pending JPH069344U (en) | 1992-07-08 | 1992-07-08 | Uninterruptible AC-DC converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069344U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6065501U (en) * | 1983-10-13 | 1985-05-09 | 品川燃料株式会社 | Briquette stove for concrete |
| JP2007031060A (en) * | 2005-07-26 | 2007-02-08 | Toshiba Elevator Co Ltd | Control device of elevator |
-
1992
- 1992-07-08 JP JP4745292U patent/JPH069344U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6065501U (en) * | 1983-10-13 | 1985-05-09 | 品川燃料株式会社 | Briquette stove for concrete |
| JP2007031060A (en) * | 2005-07-26 | 2007-02-08 | Toshiba Elevator Co Ltd | Control device of elevator |
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