JP2003116233A - Uninterruptible power supply unit - Google Patents
Uninterruptible power supply unitInfo
- Publication number
- JP2003116233A JP2003116233A JP2001309420A JP2001309420A JP2003116233A JP 2003116233 A JP2003116233 A JP 2003116233A JP 2001309420 A JP2001309420 A JP 2001309420A JP 2001309420 A JP2001309420 A JP 2001309420A JP 2003116233 A JP2003116233 A JP 2003116233A
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- power supply
- secondary winding
- voltage
- conversion circuit
- 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
Links
Landscapes
- Inverter Devices (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、無停電電源装
置、特に小型，軽量化が可能な無停電電源装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uninterruptible power supply device, and more particularly to an uninterruptible power supply device that can be reduced in size and weight.
【０００２】[0002]
【従来の技術】図７に無停電電源装置の従来例を示す。2. Description of the Related Art FIG. 7 shows a conventional example of an uninterruptible power supply.
【０００３】これは、直列補償型の無停電電源装置で、
交流電源１にはサイリスタを逆並列接続した交流（Ａ
Ｃ）スイッチ２，ＡＣスイッチ６の直列回路とダイオー
ドＤ１とバッテリＢ１の直列回路が、ＡＣスイッチ６に
は商用トランスＴＲ１の２次巻線とコンデンサ３の直列
回路が、コンデンサ３には負荷４が、バッテリＢ１には
金属酸化膜型電界効果トランジスタ（ＭＯＳＦＥＴ）Ｑ
１〜Ｑ４からなるインバータ回路５が、インバータ回路
５には商用トランスＴＲ１の１次巻線がそれぞれ接続さ
れている。この回路で、交流電源１が定格電圧より低く
なったとき、高くなったとき、停電したときの各動作に
ついて以下に説明する。This is a series compensation type uninterruptible power supply,
The AC power supply 1 is an alternating current (A
C) A series circuit of the switch 2 and the AC switch 6, a series circuit of the diode D1 and the battery B1, a series circuit of the secondary winding of the commercial transformer TR1 and the capacitor 3 in the AC switch 6, and a load 4 in the capacitor 3. , The metal oxide film type field effect transistor (MOSFET) Q is included in the battery B1.
The inverter circuit 5 including 1 to Q4 is connected to the primary winding of the commercial transformer TR1. In this circuit, each operation when the AC power supply 1 becomes lower than the rated voltage, becomes higher than the rated voltage, and a power failure occurs will be described below.
【０００４】まず、交流電源Ｖｉｎが低くなったとき
は、ＡＣスイッチ２をオンしＡＣスイッチ６をオフする
ことで、交流電源Ｖｉｎに直列にトランス２次電圧ＶＮ
２を加えることができ、次式のような関係が成立する。First, when the AC power source Vin becomes low, the AC switch 2 is turned on and the AC switch 6 is turned off, so that the transformer secondary voltage VN is connected in series with the AC power source Vin.
2 can be added, and the following relationship is established.
【０００５】
Ｖｉｎ＋ＶＮ２＝Ｖｉｎ＋（Ｎ２／Ｎ１）・ＶＮ１＝Ｖｏｕｔ …（１）
（Ｎ１：１次巻線数 Ｎ２：２次巻線数 ＶＮ１：
トランス１次電圧）
したがって、インバータ回路５を調節することにより、
出力電圧Ｖｏｕｔを一定の値に調整することができる。
なお、コンデンサ３とトランスＴＲ１の漏れインダクタ
ンス１２により、インバータ回路５からのＰＷＭ電圧Ｖ
Ｎ１を正弦波に平滑するようにしている。Vin + VN2 = Vin + (N2 / N1) .VN1 = Vout (1) (N1: primary winding number N2: secondary winding number VN1:
Transformer primary voltage) Therefore, by adjusting the inverter circuit 5,
The output voltage Vout can be adjusted to a constant value.
In addition, the PWM voltage V from the inverter circuit 5 is caused by the leakage inductance 12 of the capacitor 3 and the transformer TR1.
N1 is smoothed into a sine wave.
【０００６】一方、交流電源Ｖｉｎが高くなったとき
は、インバータ回路５により交流電源Ｖｉｎからトラン
ス２次電圧ＶＮ２が引かれるように、変圧器１次巻線に
ＰＷＭ電圧ＶＮ１を印加する。On the other hand, when the AC power supply Vin becomes high, the inverter circuit 5 applies the PWM voltage VN1 to the transformer primary winding so that the transformer secondary voltage VN2 is drawn from the AC power supply Vin.
【０００７】
Ｖｉｎ−ＶＮ２＝Ｖｉｎ−（Ｎ２／Ｎ１）・ＶＮ１＝Ｖｏｕｔ …（２）
この場合も、インバータ回路５を調節することにより、
出力電圧Ｖｏｕｔを一定の値に調整することができる。Vin−VN2 = Vin− (N2 / N1) · VN1 = Vout (2) Also in this case, the inverter circuit 5 is adjusted to
The output voltage Vout can be adjusted to a constant value.
【０００８】また、交流電源Ｖｉｎが停電したときは、
ＡＣスイッチ２をオフしＡＣスイッチ６をオンすること
で、入力電源１は切り離され、負荷４とトランスＴＲ１
の２次巻線が並列接続され、次式が成立する。When the AC power source Vin fails,
By turning off the AC switch 2 and turning on the AC switch 6, the input power source 1 is disconnected, and the load 4 and the transformer TR1 are disconnected.
The secondary windings of are connected in parallel, and the following equation is established.
【０００９】
ＶＮ２＝（Ｎ２／Ｎ１）・ＶＮ１＝Ｖｏｕｔ …（３）
以上のように、入力電源Ｖｉｎの変動に対しては、直列
動作でトランスの２次電圧を足したり引いたりして出力
電圧Ｖｏｕｔを一定の値に保ち、停電時には並列動作で
出力電圧Ｖｏｕｔを一定に保つようにしている。VN2 = (N2 / N1) · VN1 = Vout (3) As described above, with respect to the fluctuation of the input power source Vin, the secondary voltage of the transformer is added or subtracted by the series operation to output the output voltage. Vout is kept at a constant value, and the output voltage Vout is kept constant by parallel operation during a power failure.
【００１０】[0010]
【発明が解決しようとする課題】ところで上記のような
回路では、インバータ回路５の出力電圧は入力電源周波
数と同じ周波数の電圧を出力する必要があるため、商用
トランスが必要となる。一般に、商用周波数で動作する
トランスでは、鉄心が飽和しないように大きな断面積の
鉄心が必要であったり、巻線数を増大させたりしなけれ
ばならず、装置が大型化し重量も増大するという問題が
ある。By the way, in the circuit as described above, the output voltage of the inverter circuit 5 needs to output a voltage of the same frequency as the input power supply frequency, so that a commercial transformer is required. Generally, a transformer that operates at a commercial frequency requires a core with a large cross-sectional area so that the core does not saturate, or the number of windings must be increased, which causes the device to increase in size and weight. There is.
【００１１】したがって、この発明の課題は、無停電電
源装置の小型，軽量化を図ることにある。Therefore, an object of the present invention is to reduce the size and weight of an uninterruptible power supply.
【００１２】[0012]
【課題を解決するための手段】このような課題を解決す
るため、請求項１の発明では、入力電源の停電時に蓄電
池から変換回路を介して負荷に電力を供給する無停電電
源装置において、高周波の交流電圧を発生する第１の変
換回路と変圧器の１次巻線とを前記蓄電池に、変圧器の
２次巻線を前記負荷と入力電源との間に、さらに、変圧
器の２次巻線電圧を商用周波数の交流に変換する第２の
変換回路を入力電源と変圧器の２次巻線との間にそれぞ
れ接続したことを特徴とする。In order to solve such a problem, according to the invention of claim 1, in an uninterruptible power supply for supplying power from a storage battery to a load through a conversion circuit at the time of power failure of the input power supply, The first conversion circuit for generating the AC voltage of the transformer and the primary winding of the transformer to the storage battery, the secondary winding of the transformer between the load and the input power source, and the secondary of the transformer. A second conversion circuit for converting a winding voltage into an alternating current of a commercial frequency is connected between the input power supply and the secondary winding of the transformer, respectively.
【００１３】上記請求項１の発明においては、前記第１
の変換回路として蓄電池，変圧器の１次巻線および半導
体スイッチからなる一石コンバータ回路を用いることが
でき（請求項２の発明）、または、前記第１の変換回路
として半導体スイッチの直列回路とコンデンサの直列回
路とを蓄電池と並列に接続し、変圧器の１次巻線の一端
を半導体スイッチの直列接続点に、変圧器の１次巻線の
他端をコンデンサの直列接続点にそれぞれ接続したハー
フブリッジコンバータ回路を用いることができ（請求項
３の発明）、もしくは、前記第１の変換回路として半導
体スイッチの直列回路の２つを蓄電池と並列に接続し、
２つの直列回路の半導体スイッチの各直列接続点間に変
圧器の１次巻線を接続したフルブリッジコンバータ回路
を用いることができる（請求項４の発明）。In the invention of claim 1, the first
Can be used as the conversion circuit of the storage battery, the primary winding of the transformer and the semiconductor switch (the invention of claim 2), or the series circuit of the semiconductor switch and the capacitor as the first conversion circuit. Of the transformer is connected in parallel with the storage battery, one end of the primary winding of the transformer is connected to the series connection point of the semiconductor switch, and the other end of the primary winding of the transformer is connected to the series connection point of the capacitor. A half-bridge converter circuit can be used (the invention of claim 3), or two of the series circuits of semiconductor switches are connected in parallel with the storage battery as the first conversion circuit,
A full-bridge converter circuit in which the primary winding of a transformer is connected between the series connection points of the semiconductor switches of the two series circuits can be used (the invention of claim 4).
【００１４】また、請求項１ないし４のいずれかの発明
においては、前記第２の変換回路として双方向スイッチ
の直列回路を入力電源と並列に接続し、双方向スイッチ
の直列接続点に変圧器の２次巻線の一端を、変圧器の２
次巻線の他端を負荷にそれぞれ接続したものを用いるこ
とができ（請求項５の発明）、または、前記第２の変換
回路として双方向スイッチの直列回路を２つ入力電源と
並列に接続するとともに変圧器の２次巻線を２つに分割
し、変圧器の各２次巻線の一端を双方向スイッチの各直
列接続点に、変圧器の各２次巻線の他端を短絡して負荷
にそれぞれ接続したものを用いることができる（請求項
６の発明）。Further, in the invention according to any one of claims 1 to 4, a series circuit of bidirectional switches is connected in parallel as an input power source as the second conversion circuit, and a transformer is provided at a series connection point of the bidirectional switches. One end of the secondary winding of the
It is possible to use one in which the other end of the secondary winding is connected to the load respectively (invention of claim 5), or two series circuits of bidirectional switches are connected in parallel with the input power source as the second conversion circuit. In addition, the secondary winding of the transformer is divided into two, one end of each secondary winding of the transformer is short-circuited to each series connection point of the bidirectional switch, and the other end of each secondary winding of the transformer is short-circuited. Then, those connected to the loads respectively can be used (the invention of claim 6).
【００１５】さらに、請求項１ないし４のいずれかの発
明においては、前記入力電源を３相交流電源とし、双方
向スイッチの直列回路を３つ入力電源と並列に接続する
とともに変圧器の２次巻線を３つに分割し、変圧器の各
２次巻線の一端を双方向スイッチの各直列接続点に、変
圧器の各２次巻線の他端を３相負荷にそれぞれ接続する
ことができ（請求項７の発明）、あるいは、前記入力電
源を３相交流電源とし、双方向スイッチの直列回路を６
つ入力電源と並列に接続するとともに変圧器の２次巻線
を６つに分割し、変圧器の各２次巻線の一端を双方向ス
イッチの各直列接続点に、変圧器の各２次巻線の他端を
２つずつ短絡して３相負荷にそれぞれ接続することがで
きる（請求項８の発明）。Further, in the invention according to any one of claims 1 to 4, the input power supply is a three-phase AC power supply, three series circuits of bidirectional switches are connected in parallel with the input power supply, and the secondary of the transformer is used. Divide the winding into three parts, connect one end of each secondary winding of the transformer to each series connection point of the bidirectional switch, and connect the other end of each secondary winding of the transformer to the three-phase load. Alternatively, the input power supply is a three-phase AC power supply, and the bidirectional switch series circuit is 6
And the secondary winding of the transformer is divided into six, and one end of each secondary winding of the transformer is connected to each series connection point of the bidirectional switch and each secondary of the transformer is connected. It is possible to short-circuit the other end of each of the windings by two and connect them to a three-phase load (invention of claim 8).
【００１６】[0016]
【発明の実施の形態】図１はこの発明の第１の実施の形
態を示す構成図である。1 is a block diagram showing a first embodiment of the present invention.
【００１７】図７に示す従来例との相違は、サイリスタ
を逆並列接続したＡＣスイッチ２，６の代わりに、高速
でスイッチングできる双方向スイッチ７，８を用いると
ともに、商用トランスＴＲ１の代わりに高周波トランス
ＴＲ２を用いるようにした点である。双方向スイッチと
しては、例えばＩＧＢＴ（絶縁ゲート型バイポーラトラ
ンジスタ）とダイオードとの直列回路を逆並列接続し
た、図１に示すものを用いる。The difference from the conventional example shown in FIG. 7 is that bidirectional switches 7 and 8 capable of high-speed switching are used instead of the AC switches 2 and 6 in which thyristors are connected in anti-parallel, and a high frequency is used instead of the commercial transformer TR1. The point is that the transformer TR2 is used. As the bidirectional switch, for example, the one shown in FIG. 1 in which a series circuit of an IGBT (insulated gate bipolar transistor) and a diode is connected in antiparallel is used.
【００１８】図４は図１の動作説明図で、交流電源Ｖｉ
ｎが低くなった場合の補償動作を示す。FIG. 4 is a diagram for explaining the operation of FIG.
The compensation operation when n becomes low is shown.
【００１９】例えば、入力電源電圧Ｖｉｎが正の期間
で、トランス２次電圧ＶＮ２が正の期間Ｔ１には、双方
向スイッチ７をオンし双方向スイッチ８をオフすること
で、電源電圧Ｖｉｎ→トランスＶＮ２電圧→コンデンサ
３の径路で正の電流を流し、コンデンサ３の電圧を上昇
させる。次に、トランス２次電圧が負の期間Ｔ２には双
方向スイッチ７，８をオフすることで、コンデンサ３の
電荷を負荷４に放電する。このとき、トランスには逆電
圧が発生し、トランスの励磁エネルギーをリセットす
る。For example, during the period when the input power supply voltage Vin is positive and the transformer secondary voltage VN2 is positive T1, the bidirectional switch 7 is turned on and the bidirectional switch 8 is turned off, so that the power supply voltage Vin → the transformer. VN2 voltage → Positive current is passed through the path of the capacitor 3 to raise the voltage of the capacitor 3. Next, during the period T2 when the secondary voltage of the transformer is negative, the bidirectional switches 7 and 8 are turned off to discharge the electric charge of the capacitor 3 to the load 4. At this time, a reverse voltage is generated in the transformer and resets the excitation energy of the transformer.
【００２０】トランスが正の電圧の期間では、双方向ス
イッチ７のオン期間を調整することで、出力電圧Ｖｏｕ
ｔの正の電圧を調整することができる。During the period when the transformer has a positive voltage, the output voltage Vou is adjusted by adjusting the ON period of the bidirectional switch 7.
The positive voltage of t can be adjusted.
【００２１】入力電圧が負の期間では、トランスの負の
期間Ｔ３，Ｔ４に双方向スイッチ７をオンすることで、
入力電源電圧が正の期間の場合と同様に、出力電圧Ｖｏ
ｕｔの負の電圧を調整することができる。When the input voltage is negative, by turning on the bidirectional switch 7 during the negative periods T3 and T4 of the transformer,
As in the case of the positive period of the input power supply voltage, the output voltage Vo
The negative voltage on ut can be adjusted.
【００２２】交流電源Ｖｉｎが高くなったときは、双方
向スイッチ７のオン期間をさらに短くすることで、出力
電圧を調整することができる。When the AC power source Vin becomes high, the output voltage can be adjusted by further shortening the ON period of the bidirectional switch 7.
【００２３】また、入力電源が停電した場合は、双方向
スイッチ７をオフし、双方向スイッチ８をオン，オフす
ることで出力電圧を調整することができる。Further, when the input power source fails, the output voltage can be adjusted by turning off the bidirectional switch 7 and turning on and off the bidirectional switch 8.
【００２４】出力電圧が正の期間には、トランス２次電
圧が正の期間に双方向スイッチ８をオンすることで、ま
た、出力電圧が負の期間には、トランス２次電圧が負の
期間に双方向スイッチ８をオンすることで出力電圧を調
整することができる。During the period when the output voltage is positive, the bidirectional switch 8 is turned on during the period when the transformer secondary voltage is positive, and when the output voltage is negative, the transformer secondary voltage is negative. The output voltage can be adjusted by turning on the bidirectional switch 8.
【００２５】図２にこの発明の第２の実施の形態を示
す。FIG. 2 shows a second embodiment of the present invention.
【００２６】図１との相違は、トランスＴＲ２の２次巻
線を２つに分割してＮ２１巻線とＮ２２巻線とを設け、
双方向スイッチ９，１０の直列回路を追加し、双方向ス
イッチ９と１０の接続点に巻線Ｎ２１と巻線Ｎ２２を接
続した点にある。その他は、図１と同様である。The difference from FIG. 1 is that the secondary winding of the transformer TR2 is divided into two and an N21 winding and an N22 winding are provided,
A series circuit of the bidirectional switches 9 and 10 is added, and the winding N21 and the winding N22 are connected to the connection point of the bidirectional switches 9 and 10. Others are the same as in FIG.
【００２７】図５は図２の動作説明図で、交流電源Ｖｉ
ｎが低くなった場合の補償動作を示す。FIG. 5 is a diagram for explaining the operation of FIG.
The compensation operation when n becomes low is shown.
【００２８】例えば、入力電源電圧Ｖｉｎが正の期間
で、トランス２次電圧ＶＮ２１が正の期間Ｔ１には、双
方向スイッチ７をオンし双方向スイッチ８〜１０をオフ
することで、電源電圧Ｖｉｎ→トランスＶＮ２１電圧→
コンデンサ３の径路で正の電流を流し、コンデンサ３の
電圧を上昇させる。次に、トランス２次電圧ＶＮ２２が
が正の期間Ｔ２（トランス２次電圧ＶＮ２１は負）に
は、双方向スイッチ９をオンし双方向スイッチ７，９，
１０をオフすることで、電源電圧Ｖｉｎ→トランスＶＮ
２２電圧→コンデンサ３の径路で正の電流を流し、コン
デンサ３の電圧を上昇させる。このとき、トランスには
逆電圧が発生し、トランスの励磁エネルギーをリセット
する。For example, during the period in which the input power supply voltage Vin is positive and the transformer secondary voltage VN21 is in the positive period T1, by turning on the bidirectional switch 7 and turning off the bidirectional switches 8 to 10, the power supply voltage Vin → Transformer VN21 voltage →
A positive current is passed through the path of the capacitor 3 to raise the voltage of the capacitor 3. Next, during the period T2 in which the transformer secondary voltage VN22 is positive (the transformer secondary voltage VN21 is negative), the bidirectional switch 9 is turned on and the bidirectional switches 7, 9,
By turning off 10, power supply voltage Vin → transformer VN
22 voltage → a positive current is passed through the path of the capacitor 3 to increase the voltage of the capacitor 3. At this time, a reverse voltage is generated in the transformer and resets the excitation energy of the transformer.
【００２９】トランスが正の電圧の期間では、双方向ス
イッチ７と９のオン期間を調整することで、出力電圧Ｖ
ｏｕｔの正の電圧を調整することができる。During the period when the transformer has a positive voltage, the output voltage V is adjusted by adjusting the ON period of the bidirectional switches 7 and 9.
The positive voltage on out can be adjusted.
【００３０】入力電圧が負の期間では、トランスの２次
電圧ＶＮ２１が負の期間Ｔ３に双方向スイッチ７をオン
することで、また、トランスの２次電圧ＶＮ２２が負の
期間Ｔ４に双方向スイッチ９をオンすることで、入力電
源電圧が正の期間の場合と同様に、出力電圧Ｖｏｕｔの
負の電圧を調整することができる。In the period when the input voltage is negative, the bidirectional switch 7 is turned on in the period T3 in which the secondary voltage VN21 of the transformer is negative, and in the period T4 in which the secondary voltage VN22 of the transformer is negative. By turning on 9, the negative voltage of the output voltage Vout can be adjusted as in the case where the input power supply voltage is in the positive period.
【００３１】交流電源Ｖｉｎが高くなったときは、双方
向スイッチ７と９のオン期間をさらに短くするか、トラ
ンスの電圧極性が逆のときに双方向スイッチ７と９をオ
ンすることで、出力電圧を調整することができる。When the AC power source Vin becomes high, the on period of the bidirectional switches 7 and 9 is further shortened, or the bidirectional switches 7 and 9 are turned on when the voltage polarities of the transformers are opposite to each other. The voltage can be adjusted.
【００３２】さらに、入力電源が停電した場合は、双方
向スイッチ７と９をオフし、双方向スイッチ８と１０を
オンすることで出力電圧を調整することができる。Further, when the input power source fails, the output voltage can be adjusted by turning off the bidirectional switches 7 and 9 and turning on the bidirectional switches 8 and 10.
【００３３】出力電圧が正の期間には、トランス２次電
圧ＶＮ２１が正の期間に双方向スイッチ８をオンし、ト
ランス２次電圧ＶＮ２２が正の期間に双方向スイッチ１
０をオンすることで、また、出力電圧が負の期間には、
トランス２次電圧ＶＮ２１が負の期間に双方向スイッチ
８をオンし、トランス２次電圧ＶＮ２２が負の期間に双
方向スイッチ１０をオンすることで出力電圧を調整する
ことができる。When the output voltage is positive, the bidirectional switch 8 is turned on while the transformer secondary voltage VN21 is positive, and the bidirectional switch 1 is turned on when the transformer secondary voltage VN22 is positive.
By turning 0 on, and during the period when the output voltage is negative,
The output voltage can be adjusted by turning on the bidirectional switch 8 while the transformer secondary voltage VN21 is negative and turning on the bidirectional switch 10 while the transformer secondary voltage VN22 is negative.
【００３４】図３にこの発明を３相電源に適用した場合
の例を示す。FIG. 3 shows an example in which the present invention is applied to a three-phase power source.
【００３５】図示のように、３相電源ｖu，ｖv，ｖwと
中性点Ｏとの間には双方向スイッチ１２〜１７の直列回
路が、トランスＴＲ３には２次巻線が３つに分割され、
各２次巻線の一端には各スイッチの接続点が、他端には
負荷Ｒ２〜Ｒ４が、中性点Ｏと２次巻線の各負荷側との
間にはコンデンサＣ１〜Ｃ３がそれぞれ接続されてい
る。As shown in the figure, a series circuit of bidirectional switches 12 to 17 is provided between the three-phase power supplies v u , v v , v w and the neutral point O, and a transformer TR3 has a secondary winding of three. Divided into two,
The connection point of each switch is provided at one end of each secondary winding, loads R2 to R4 are provided at the other end, and capacitors C1 to C3 are provided between the neutral point O and each load side of the secondary winding. It is connected.
【００３６】この場合も、中性点と各相電圧ｖu，ｖv，
ｖwの各々は図１と同じ構成になるためその動作も同
様、つまり、入力電圧Ｖｉｎの変動に対しては双方向ス
イッチ１２，１４，１６のオン，オフで出力電圧を一定
に保ち、停電時には双方向スイッチ１３，１５，１７の
オン，オフで出力電圧を一定に保つ動作をする。また、
双方向スイッチを１２個、トランスの２次巻線を６個用
いることで、図２を３相回路に展開することも可能であ
る。さらに、バッテリ電圧を交流電圧に変換する変換回
路として、図６（ａ）に示す一石コンバータや、同
（ｂ）に示すハーフブリッジコンバータを用いることも
可能である。Also in this case, the neutral point and each phase voltage v u , v v ,
Since each of v w has the same configuration as in FIG. 1, its operation is also the same. Occasionally, the bidirectional switches 13, 15, 17 are turned on and off to keep the output voltage constant. Also,
It is also possible to develop FIG. 2 into a three-phase circuit by using twelve bidirectional switches and six secondary windings of a transformer. Furthermore, as the conversion circuit for converting the battery voltage into the AC voltage, it is also possible to use the Ichiseki converter shown in FIG. 6A or the half bridge converter shown in FIG. 6B.
【００３７】[0037]
【発明の効果】この発明によれば、トランスの２次巻線
の高周波電圧を第２変換器により、商用電圧と同じ極性
または負の極性に変換するようにしたので、第１変換器
としては高周波トランスを使用でき、小さな断面積で巻
線数の少ないトランスが使用可能となり、小型，軽量化
を図ることができる。According to the present invention, the high frequency voltage of the secondary winding of the transformer is converted into the same polarity as the commercial voltage or the negative polarity by the second converter. A high-frequency transformer can be used, and a transformer with a small cross-sectional area and a small number of windings can be used, which enables reduction in size and weight.
【図１】この発明の第１の実施の形態を示す回路図であ
る。FIG. 1 is a circuit diagram showing a first embodiment of the present invention.
【図２】この発明の第２の実施の形態を示す回路図であ
る。FIG. 2 is a circuit diagram showing a second embodiment of the present invention.
【図３】この発明の第３の実施の形態を示す回路図であ
る。FIG. 3 is a circuit diagram showing a third embodiment of the present invention.
【図４】図１の動作説明図である。FIG. 4 is an operation explanatory diagram of FIG. 1.
【図５】図２の動作説明図である。5 is an operation explanatory diagram of FIG. 2;
【図６】この発明で使用可能なコンバータの例を示す回
路図である。FIG. 6 is a circuit diagram showing an example of a converter that can be used in the present invention.
【図７】従来例を示す回路図である。FIG. 7 is a circuit diagram showing a conventional example.
１…入力電源、２，６…交流（ＡＣ）スイッチ、３，Ｃ
１〜Ｃ５…コンデンサ、４，Ｒ２〜Ｒ４…負荷、５…イ
ンバータ、７〜１７…双方向スイッチ、ＴＲ１…商用ト
ランス、ＴＲ２，ＴＲ３…高周波トランス、Ｂ１…バッ
テリ、Ｑ１〜Ｑ４…金属酸化膜型電界効果トランジスタ
（ＭＯＳＦＥＴ）。1 ... Input power supply, 2, 6 ... Alternating current (AC) switch, 3, C
1-C5 ... Capacitor, 4, R2-R4 ... Load, 5 ... Inverter, 7-17 ... Bidirectional switch, TR1 ... Commercial transformer, TR2, TR3 ... High frequency transformer, B1 ... Battery, Q1-Q4 ... Metal oxide film type Field effect transistor (MOSFET).
Claims (8)
を介して負荷に電力を供給する無停電電源装置におい
て、 高周波の交流電圧を発生する第１の変換回路と変圧器の
１次巻線とを前記蓄電池に、変圧器の２次巻線を前記負
荷と入力電源との間に、さらに、変圧器の２次巻線電圧
を商用周波数の交流に変換する第２の変換回路を入力電
源と変圧器の２次巻線との間にそれぞれ接続したことを
特徴とする無停電電源装置。1. An uninterruptible power supply that supplies power from a storage battery to a load via a conversion circuit when the input power fails, and a first conversion circuit that generates a high-frequency AC voltage and a primary winding of a transformer. To the storage battery, a secondary winding of the transformer between the load and the input power supply, and a second conversion circuit for converting the secondary winding voltage of the transformer to an alternating current of a commercial frequency as the input power supply. An uninterruptible power supply device characterized in that it is respectively connected to the secondary winding of a transformer.
器の１次巻線および半導体スイッチからなる一石コンバ
ータ回路を用いることを特徴とする請求項１に記載の無
停電電源装置。2. The uninterruptible power supply device according to claim 1, wherein an Ichiseki converter circuit including a storage battery, a primary winding of a transformer, and a semiconductor switch is used as the first conversion circuit.
チの直列回路とコンデンサの直列回路とを蓄電池と並列
に接続し、変圧器の１次巻線の一端を半導体スイッチの
直列接続点に、変圧器の１次巻線の他端をコンデンサの
直列接続点にそれぞれ接続したハーフブリッジコンバー
タ回路を用いることを特徴とする請求項１に記載の無停
電電源装置。3. A series circuit of a semiconductor switch and a series circuit of a capacitor are connected in parallel with a storage battery as the first conversion circuit, and one end of a primary winding of a transformer is connected to a series connection point of the semiconductor switch. 2. The uninterruptible power supply device according to claim 1, wherein a half-bridge converter circuit is used in which the other end of the primary winding of the capacitor is connected to a series connection point of capacitors.
チの直列回路の２つを蓄電池と並列に接続し、２つの直
列回路の半導体スイッチの各直列接続点間に変圧器の１
次巻線を接続したフルブリッジコンバータ回路を用いる
ことを特徴とする請求項１に記載の無停電電源装置。4. As the first conversion circuit, two series circuits of semiconductor switches are connected in parallel with a storage battery, and a transformer 1 is provided between the series connection points of the semiconductor switches of the two series circuits.
The uninterruptible power supply device according to claim 1, wherein a full bridge converter circuit in which a secondary winding is connected is used.
チの直列回路を入力電源と並列に接続し、双方向スイッ
チの直列接続点に変圧器の２次巻線の一端を、変圧器の
２次巻線の他端を負荷にそれぞれ接続したものを用いる
ことを特徴とする請求項１ないし４のいずれかに記載の
無停電電源装置。5. A series circuit of bidirectional switches is connected in parallel with an input power source as the second conversion circuit, and one end of a secondary winding of the transformer is connected to a series connection point of the bidirectional switches, and The uninterruptible power supply according to any one of claims 1 to 4, wherein the other end of the next winding is connected to a load.
チの直列回路を２つ入力電源と並列に接続するとともに
変圧器の２次巻線を２つに分割し、変圧器の各２次巻線
の一端を双方向スイッチの各直列接続点に、変圧器の各
２次巻線の他端を短絡して負荷にそれぞれ接続したもの
を用いることを特徴とする請求項１ないし４のいずれか
に記載の無停電電源装置。6. The secondary conversion circuit, wherein two series circuits of bidirectional switches are connected in parallel with an input power source as the second conversion circuit, and the secondary winding of the transformer is divided into two, respectively. 5. One in which one end of the wire is connected to each series connection point of the bidirectional switch, and the other end of each secondary winding of the transformer is short-circuited and connected to the load, respectively. Uninterruptible power supply described in.
向スイッチの直列回路を３つ入力電源と並列に接続する
とともに変圧器の２次巻線を３つに分割し、変圧器の各
２次巻線の一端を双方向スイッチの各直列接続点に、変
圧器の各２次巻線の他端を３相負荷にそれぞれ接続する
ことを特徴とする請求項１ないし４のいずれかに記載の
無停電電源装置。7. The input power source is a three-phase alternating current power source, a series circuit of bidirectional switches is connected in parallel with three input power sources, and the secondary winding of the transformer is divided into three parts, and each of the transformers is divided into three parts. 5. One of the secondary windings is connected to each series connection point of the bidirectional switch, and the other end of each secondary winding of the transformer is connected to a three-phase load, respectively. Uninterruptible power supply described.
向スイッチの直列回路を６つ入力電源と並列に接続する
とともに変圧器の２次巻線を６つに分割し、変圧器の各
２次巻線の一端を双方向スイッチの各直列接続点に、変
圧器の各２次巻線の他端を２つずつ短絡して３相負荷に
それぞれ接続することを特徴とする請求項１ないし４の
いずれかに記載の無停電電源装置。8. The input power source is a three-phase alternating current power source, a series circuit of bidirectional switches is connected in parallel with six input power sources, and a secondary winding of the transformer is divided into six parts. 2. One end of the secondary winding is short-circuited to each series connection point of the bidirectional switch, and the other end of each secondary winding of the transformer is short-circuited two by two to be connected to a three-phase load, respectively. 5. The uninterruptible power supply device according to any one of 4 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001309420A JP2003116233A (en) | 2001-10-05 | 2001-10-05 | Uninterruptible power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001309420A JP2003116233A (en) | 2001-10-05 | 2001-10-05 | Uninterruptible power supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003116233A true JP2003116233A (en) | 2003-04-18 |
Family
ID=19128575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001309420A Pending JP2003116233A (en) | 2001-10-05 | 2001-10-05 | Uninterruptible power supply unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003116233A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007010633A (en) * | 2005-07-04 | 2007-01-18 | Minebea Co Ltd | High precision angle detector |
| US7362601B2 (en) | 2005-02-28 | 2008-04-22 | Tdk Corporation | Power supply device |
| JP2009201283A (en) * | 2008-02-22 | 2009-09-03 | Meidensha Corp | Power supply compensator |
| CN103346612A (en) * | 2013-06-25 | 2013-10-09 | 王良根 | 336 VDC direct current uninterruptible power system and power supply method |
-
2001
- 2001-10-05 JP JP2001309420A patent/JP2003116233A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7362601B2 (en) | 2005-02-28 | 2008-04-22 | Tdk Corporation | Power supply device |
| JP2007010633A (en) * | 2005-07-04 | 2007-01-18 | Minebea Co Ltd | High precision angle detector |
| JP4644055B2 (en) * | 2005-07-04 | 2011-03-02 | ミネベア株式会社 | High precision angle detector |
| JP2009201283A (en) * | 2008-02-22 | 2009-09-03 | Meidensha Corp | Power supply compensator |
| CN103346612A (en) * | 2013-06-25 | 2013-10-09 | 王良根 | 336 VDC direct current uninterruptible power system and power supply method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5694307A (en) | Integrated AC/DC and DC/DC converter | |
| US7372709B2 (en) | Power conditioning system for energy sources | |
| JP3530359B2 (en) | Three-phase power factor improving converter | |
| JP2579077B2 (en) | Inverter welding power supply | |
| JP3674283B2 (en) | Insulated power converter | |
| JP3584686B2 (en) | Voltage source power conversion circuit | |
| JP2003116233A (en) | Uninterruptible power supply unit | |
| JP6314734B2 (en) | Power converter | |
| JPS63268470A (en) | Power convertor | |
| JPH0161023B2 (en) | ||
| JPH0637375A (en) | High frequency power source for laser oscillator | |
| JP2001314086A (en) | Ac-dc converter | |
| JP2618931B2 (en) | Power converter | |
| JPH03277180A (en) | Voltage type inverter | |
| JP2005229666A (en) | Uninterruptible power source apparatus | |
| JPH0759360A (en) | Uninterruptive power unit | |
| JPH05161357A (en) | Power unit | |
| JP2551403Y2 (en) | Power supply | |
| JP2004147475A (en) | Rectifier | |
| JP2566579B2 (en) | Power converter | |
| JPH06292369A (en) | Uninterruptible power supply device | |
| JPH04271275A (en) | Snubber circuit for rectifier | |
| JP2000333463A (en) | Switching power supply | |
| JP2002078358A (en) | Power supply for vehicle | |
| JPH02155401A (en) | Auxiliary power supply device for electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20040122 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20040205 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040312 |
|
| A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A711 Effective date: 20041201 |
|
| RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20041210 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050617 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050623 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050804 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20051124 |