JP3413346B2 - Protection circuit of power saving transformer with autonomous switching device - Google Patents
Protection circuit of power saving transformer with autonomous switching deviceInfo
- Publication number
- JP3413346B2 JP3413346B2 JP13490797A JP13490797A JP3413346B2 JP 3413346 B2 JP3413346 B2 JP 3413346B2 JP 13490797 A JP13490797 A JP 13490797A JP 13490797 A JP13490797 A JP 13490797A JP 3413346 B2 JP3413346 B2 JP 3413346B2
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- Prior art keywords
- voltage
- circuit
- coil
- sets
- switching device
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- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Transformers (AREA)
- Protection Of Static Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Ac-Ac Conversion (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はトランス等の省電力
装置において、入力電圧がある一定の設定電圧範囲外に
降下もしくは上昇した時でも、その設定電圧範囲内の電
圧が出力電圧とされるように、自律的に調整する機能を
有する省電力変圧器の保護回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power-saving device such as a transformer, so that even when the input voltage drops or rises outside a certain set voltage range, the voltage within the set voltage range is set as the output voltage. In particular, the present invention relates to a protection circuit for a power saving transformer having a function of autonomously adjusting.
【０００２】[0002]
【従来の技術】本出願人にかかる昇降同圧自律切替装置
付き省電力変圧器（特開平８−１９１５４２号公報参
照）は、図１に示すとおり、単相三線式又は二線式の単
巻コイル型トランスにおいて、入力端子Ｒ、Ｔと接続し
た複数組の主コイルＬ1 、Ｌ2 及びＬ5 、Ｌ6 を単相内
鉄形コア（９）に２回路相巻きし、これらの各回路の主
コイルＬ2 とＬ6 との端部間に、前記コア（９）に巻い
て相互に直列に接続された複数組の励磁コイルＬ3 、Ｌ
7 及びＬ4 、Ｌ8 を、複数の組み合わせ結線によって接
続すると共に、前記入力端子に接続された電圧センサー
の検知した電圧値によって、オン、オフとなる複数組の
サイリスタ（１、２、３、４、５、６、７、８、）を前
記端部間及び各励磁コイル間に設け、これらの各組のサ
イリスタ（１、２、３、４、５、６、７、８）のオン、
オフによって、前記端部間及び各励磁コイル間の一組又
は複数組を接続あるいはカットし、入力電圧に対する出
力電圧を無停電で昇圧、同圧、降圧する回路に自律的に
切替自在とした構成を有していた。2. Description of the Related Art A power-saving transformer (see Japanese Unexamined Patent Publication No. 8-191542) equipped with a self-switching automatic switching device for raising and lowering a pressure according to the present applicant (see Japanese Patent Application Laid-Open No. 8-191542) has a single-phase three-wire type or a two-wire type single winding. In the coil type transformer, two sets of main coils L1, L2 and L5, L6 connected to the input terminals R, T are wound around the single-phase inner iron core (9) in two circuit phases, and the main coil L2 of each of these circuits is wound. And L6, a plurality of sets of exciting coils L3, L wound around the core (9) and connected in series with each other between the ends thereof.
7 and L4, L8 are connected by a plurality of combinational wirings, and a plurality of sets of thyristors (1, 2, 3, 4, which are turned on and off according to the voltage value detected by the voltage sensor connected to the input terminal are connected. 5, 6, 7, 8) are provided between the ends and between the exciting coils to turn on the thyristors (1, 2, 3, 4, 5, 6, 7, 8) of each set.
A configuration in which one or more sets are connected or cut between the ends and between the exciting coils by turning off, and the output voltage with respect to the input voltage can be autonomously switched to a circuit that steps up, equalizes, or steps down the output voltage without interruption. Had.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
ような省電力変圧装置においても、受電設備において受
電変圧器に電源を投入すると、進相コンデンサーとの兼
ね合いにより受電変圧器に過渡現象が起こり変圧器容量
の数十倍の突入電流が省電力機器の電圧調整回路に流れ
込み制御回路、サイリスタ等の半導体スイッチが耐容量
を越えて破損することが多かった。However, even in the conventional power-saving transformer, when power is supplied to the receiving transformer in the receiving equipment, a transient phenomenon occurs in the receiving transformer due to the balance with the phase advancing capacitor. Inrush current of several tens of times the capacity of the device flows into the voltage adjustment circuit of power-saving equipment, and semiconductor switches such as control circuits and thyristors often exceed the withstand capacity and are damaged.
【０００４】[0004]
【課題を解決するための手段】そこで上記課題を解決す
るために、本発明は突入電流が電圧調整回路に流れ込ま
ないように主コイルの出力側に時間差閉回路を設けたも
のである。すなわち、単相三線式又は二線式の単巻コイ
ル型トランスにおいて、入力端子と接続した複数組の主
コイルを単相内鉄形コアに２回路相巻きし、これらの各
回路の主コイルの端部間に、前記コアに巻いて相互に直
列に接続された複数組の励磁コイルを、複数の組み合わ
せ結線によって接続すると共に、前記入力端子に接続さ
れた電圧センサーの電圧値によって、オン、オフとなる
複数組のサイリスタを、前記端部間及び各励磁コイル間
に設け、これらの各組のサイリスタのオン、オフによっ
て前記端部間及び各励磁コイル間の一組又は複数組を接
続あるいはカットし、入力電圧に対する出力電圧を無停
電で昇圧、同圧、降圧する回路に自律的に切替え自在と
した昇降同圧自律切替装置付き省電力変圧器の主コイル
の出力側に時間差閉回路を設けることにより解決され
た。In order to solve the above problems, the present invention provides a time difference closing circuit on the output side of the main coil so that the inrush current does not flow into the voltage adjusting circuit. That is, in a single-phase three-wire or two-wire single-winding coil type transformer, two sets of main coils connected to the input terminals are wound around the single-phase inner iron core in two circuit phases, and the main coil of each of these circuits is wound. Between the ends, a plurality of sets of exciting coils wound around the core and connected in series with each other are connected by a plurality of combination wirings, and turned on and off depending on the voltage value of the voltage sensor connected to the input terminal. A plurality of sets of thyristors are provided between the ends and between the exciting coils, and one set or a plurality of sets between the ends and the exciting coils are connected or cut by turning on and off the thyristors of each set. In addition, a time difference closed circuit is installed on the output side of the main coil of the power-saving transformer with a step-up / down same-voltage autonomous switching device that can autonomously switch the output voltage against the input voltage to a circuit that boosts, equalizes, or lowers the voltage without interruption. It has been solved by the Rukoto.
【０００５】[0005]
【発明の実施の形態】本発明の省電力変圧器によれば、
入力電圧が設定範囲内の電圧値を外れるような降下や上
昇をすると、これを電圧センサーが検知し、この電圧セ
ンサーからの出力信号を受けたサイリスタによって上記
複数組の励磁コイルの組み合わせが制御され、入力電圧
値の降下率を調整したり、逆に電圧を上昇させたりし
て、常に設定された範囲内の電圧値が出力できる。そし
て、さらに、入力電圧の値が設定範囲内の電圧値と同一
で、電圧の降下または上昇が不必要な場合には、電圧の
降下や上昇をさせず、入力電圧と同じ電圧が出力できる
ようになっている。また、入力電圧が下降していく場合
と上昇していく場合とでは、電圧の降下率と上昇率を切
り替える入力電圧値を異にしてヒステリシスを持たせ、
励磁コイル切り替え時の機械の判断ミスを解消し、か
つ、コイルに負担がかからないようになっている。そし
て、本発明の主たる特徴として、主コイルの出力側に時
間差回路を設けることにより、外部からの突入電流が電
圧調整回路に流れ込むことを防止し、サイリスタの破損
を防止することができる。BEST MODE FOR CARRYING OUT THE INVENTION According to the power saving transformer of the present invention,
When the input voltage drops or rises so as to deviate from the voltage value within the set range, the voltage sensor detects this and the thyristor that receives the output signal from this voltage sensor controls the combination of the above multiple sets of exciting coils. By adjusting the drop rate of the input voltage value or conversely increasing the voltage, it is possible to always output the voltage value within the set range. Further, when the input voltage value is the same as the voltage value within the set range and the voltage drop or increase is unnecessary, the same voltage as the input voltage can be output without dropping or increasing the voltage. It has become. In addition, when the input voltage is decreasing and when it is increasing, the input voltage value for switching between the rate of voltage decrease and the rate of increase is made different to have hysteresis.
It eliminates the machine's misjudgment when switching the excitation coil and prevents the coil from being overloaded. As a main feature of the present invention, by providing a time difference circuit on the output side of the main coil, it is possible to prevent an inrush current from the outside from flowing into the voltage adjustment circuit and prevent damage to the thyristor.
【０００６】以下、本発明を図面を引用して説明する。
図１は本発明の省電力変圧器の概略構成回路図であっ
て、この回路図で示すとおり、入力端子Ｒ、Ｔと接続し
た複数の主コイルＬ1 、Ｌ2 及びＬ5 、Ｌ6 を単相内鉄
形コア（９）に２回路相巻きし、これらの各回路の主コ
イルＬ2 とＬ6 との端部間に、前記コア（９）に巻いて
相互に直列に接続された複数組の励磁コイルＬ3 、Ｌ7
及びＬ4 、Ｌ8 を、複数の組み合わせ結線によって接続
する。また、トランスの出力端子ｒを、前記回路の主コ
イルＬ2 と励磁コイルＬ3 との間に、出力端子ｔを主コ
イルＬ6 と励磁コイルＬ7 との間にそれぞれ接続し、零
相の入力端子Ｎと出力端子ｎとを相互に接続する。The present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration circuit diagram of a power-saving transformer of the present invention. As shown in the circuit diagram, a plurality of main coils L1, L2 and L5, L6 connected to input terminals R, T are connected to a single-phase inner iron Shaped core (9) wound in two circuit phases, and between the ends of the main coils L2 and L6 of each of these circuits, a plurality of sets of exciting coils L3 wound around the core (9) and connected in series with each other. , L7
And L4 and L8 are connected by a plurality of combination wirings. Further, the output terminal r of the transformer is connected between the main coil L2 and the exciting coil L3 of the circuit, and the output terminal t is connected between the main coil L6 and the exciting coil L7, and the zero-phase input terminal N is connected. The output terminal n is mutually connected.
【０００７】入力電圧を検知するための電圧センサー
（図示しない）は、基盤（図示しない）の中に組み込ま
れており、一方の端子を前記各主コイルＬ1 、Ｌ5 の入
力端に接続し、他方の端子を各コイル間に設けられた、
それぞれのサイリスタ（１、２、３、４、５、６、７、
８）に接続してあるもので、該サイリスタ（１、２、
３、４、５、６、７、８）は前記電圧センサーの検知し
た電圧値によって送られる出力信号によってオン、オフ
となり、回路における各主コイルＬ1 、Ｌ2 、Ｌ5、Ｌ6
及び各励磁コイルＬ3 、Ｌ4 、Ｌ7 、Ｌ8 の組み合わ
せ方を制御し、出力電圧を自律的に調整するものであ
る。A voltage sensor (not shown) for detecting an input voltage is incorporated in a board (not shown), and one terminal is connected to the input terminals of the main coils L1 and L5, and the other terminal is connected to the other. The terminal of was provided between each coil,
Each thyristor (1, 2, 3, 4, 5, 6, 7,
8) connected to the thyristor (1, 2,
3, 4, 5, 6, 7, 8) are turned on and off by an output signal sent by the voltage value detected by the voltage sensor, and each main coil L1, L2, L5, L6 in the circuit is turned on and off.
Also, the output voltage is autonomously adjusted by controlling the combination of the exciting coils L3, L4, L7 and L8.
【０００８】これら各サイリスタ（１、２、３、４、
５、６、７、８）は図１で示すとおり、サイリスタ
（１）が主コイルＬ6 と励磁コイルＬ3 の間に、サイリ
スタ（２）が主コイルＬ2 と励磁コイルＬ7 の間に、サ
イリスタ（３）が主コイルＬ2 と励磁コイルＬ3 の間
に、サイリスタ（４）が主コイルＬ6 と励磁コイルＬ7
の間に、サイリスタ（５）が励磁コイルＬ3 とＬ7 の間
に、サイリスタ（６）が励磁コイルＬ4 とＬ8 の間に、
そして、サイリスタ（７）は主コイルＬ2 と励磁コイル
Ｌ8 の間に、サイリスタ（８）は主コイルＬ6 と励磁コ
イルＬ4 の間にそれぞれ接続されている。Each of these thyristors (1, 2, 3, 4,
As shown in FIG. 1, the thyristor (1) is arranged between the main coil L6 and the exciting coil L3, and the thyristor (2) is arranged between the main coil L2 and the exciting coil L7. ) Is between the main coil L2 and the exciting coil L3, and the thyristor (4) is between the main coil L6 and the exciting coil L7.
, The thyristor (5) is between the exciting coils L3 and L7, and the thyristor (6) is between the exciting coils L4 and L8.
The thyristor (7) is connected between the main coil L2 and the exciting coil L8, and the thyristor (8) is connected between the main coil L6 and the exciting coil L4.
【０００９】以上のように、昇降同圧自律切替装置付き
省電力変圧器は、本願出願人に係る特開平８−１９１５
４２号公報に、入力電圧に対する出力電圧を無停電で昇
圧、同圧、降圧回路に自律的に切替自在の技術内容が詳
しく開示されているが、その概略は、電圧センサーが検
知する入力電圧の値によって、各主コイルの端部間及び
各励磁コイル間に設けられたサイリスタが制御され、任
意に設定した負荷側電圧の最低電圧値を下回らないよう
に、回路が自律的に切り替わるものであって、このよう
な切り替わりを繰り返して、入力電圧が降下時でも上昇
時でも、また、入力電圧の値によらずに、ある一定の設
定電圧範囲内の電圧値が出力できるものである。As described above, the power saving transformer with the step-up / down same-voltage autonomous switching device is disclosed in Japanese Patent Application Laid-Open No. 8-1915 of the present applicant.
Japanese Unexamined Patent Publication No. 42-42 discloses in detail the technical content of being able to autonomously switch the output voltage with respect to the input voltage to the step-up, step-down, and step-down circuits uninterruptedly. The outline is that of the input voltage detected by the voltage sensor. The value controls the thyristors provided between the ends of each main coil and between each exciting coil, and the circuit switches autonomously so as not to fall below the arbitrarily set minimum voltage of the load side voltage. By repeating such switching, a voltage value within a certain set voltage range can be output regardless of whether the input voltage drops or rises, or regardless of the value of the input voltage.
【００１０】このような昇降同圧自律切替付き省電力変
圧器において、外部からの突入電流が電圧調整回路に流
れ込まないように、主コイルの出力側に時間差閉回路を
設けることによりサイリスタの破損を防止することがで
きる。そこで、時間差閉回路の具体的実施例を以下に回
路図を用いて説明する。In such a power-saving transformer with step-up / down same-voltage autonomous switching, a thyristor is damaged by providing a time-lag closing circuit on the output side of the main coil so that an inrush current from the outside does not flow into the voltage adjusting circuit. Can be prevented. Therefore, a specific example of the time difference closed circuit will be described below with reference to a circuit diagram.
【００１１】図２は、省電力変圧器の主コイルの出力側
に遅延回路ＤＬ（１０）および電磁接触器ＭＣ（１１）
（電磁開閉器、マグネットスイッチ等）をセットした時
間差閉回路を設けた実施例を示す。省電圧変圧器の電源
投入時に、主コイルと励磁コイルに設けられた電磁接触
器は遮断されており、このような状態で受電トランスに
電源が投入されると主コイルに通電され、スルー状態に
なり、その後遅延回路が作動し、１〜２秒後には主コイ
ル側と励磁側各コイルを接続することにより、受電トラ
ンスの投入時の突入電流を遮断し、省電力変圧器の電圧
調整回路破損がなくなり、安全性が十分に確保できる。FIG. 2 shows a delay circuit DL (10) and an electromagnetic contactor MC (11) on the output side of the main coil of a power saving transformer.
An example in which a time difference closing circuit in which (an electromagnetic switch, a magnet switch, etc.) is set is provided will be shown. When the power of the voltage-saving transformer is turned on, the electromagnetic contactors provided in the main coil and the excitation coil are cut off.When the power of the power receiving transformer is turned on in such a state, the main coil is energized and put into the through state. After that, the delay circuit operates, and after 1 to 2 seconds, the main coil side and the excitation side coil are connected to shut off the inrush current when the power receiving transformer is turned on and damage the voltage adjustment circuit of the power saving transformer. Is eliminated and sufficient safety can be secured.
【００１２】[0012]
【発明の効果】本発明によれば、出力電圧を降下させて
消費電力の減少を図り、節電できることはいうまでもな
く、入力電圧が設定電圧の範囲外に降下もしくは上昇し
ても、自律的に設定範囲内の電圧値が出力されるように
調整されるものであるため、負荷への影響は皆無にな
る。また、本発明は、単に励磁コイルの接続を切り替え
ることによって出力電圧が自律的に調整できるものであ
るため、容易に実施が可能であるという利点がある。そ
して、外部からの突入電流が電圧調整回路に流れるのを
防ぐことにより、サイリスタの破損がなくなり、安全が
十分に確保できるものである。According to the present invention, it is needless to say that the output voltage can be lowered to reduce the power consumption to save power, and even if the input voltage drops or rises outside the range of the set voltage, it is autonomous. Since it is adjusted so that the voltage value within the set range is output, there is no influence on the load. Further, the present invention has an advantage that it can be easily implemented because the output voltage can be autonomously adjusted by simply switching the connection of the exciting coil. Then, by preventing the inrush current from the outside from flowing into the voltage adjusting circuit, the thyristor is not damaged and the safety can be sufficiently ensured.
【図１】本発明の昇降同圧自律切替装置付き省電力変圧
器の概略構成回路図FIG. 1 is a schematic configuration circuit diagram of a power-saving transformer with a step-up / down same-voltage autonomous switching device of the present invention.
【図２】本発明の概略構成回路図。FIG. 2 is a schematic configuration circuit diagram of the present invention.
Ｌ1 、Ｌ2 、Ｌ5 、Ｌ6 主コイル Ｌ3 、Ｌ4 、Ｌ7 、Ｌ8 励磁コイル １〜８ サイリスタ ９ 単相内鉄形コア １０ 遅延回路ＤＬ １１ 電磁接触器ＭＣ L1, L2, L5, L6 Main coil L3, L4, L7, L8 Excitation coil 1-8 Thyristor 9 Single-phase inner iron core 10 Delay circuit DL 11 Electromagnetic contactor MC
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02H 9/02 H02H 7/00 - 7/055 H02J 3/12 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields investigated (Int.Cl. 7 , DB name) H02H 9/02 H02H 7 /00-7/055 H02J 3/12
Claims (2)
ランスにおいて、入力端子と接続した複数組の主コイル
を単相内鉄形コアに２回路相巻きし、これらの各回路の
主コイルの端部間に、前記コアに巻いて相互に直列に接
続された複数組の励磁コイルを、複数の組合わせ結線に
よって接続すると共に、前記入力端子に接続された電圧
センサーの電圧値によって、オン、オフとなる複数組の
サイリスタを、前記端部間及び各励磁コイル間に設け、
これらの各組のサイリスタのオン、オフによって前記端
部間及び各励磁コイル間の一組又は複数組を接続あるい
はカットし、入力電圧に対する出力電圧を無停電で昇
圧、同圧、降圧する回路に自律的に切替え自在とした昇
降同圧自律切替装置付き省電力変圧器の主コイルの出力
側に時間差閉回路を設けたことを特徴とする昇降同圧自
律切替装置付き省電力変圧器の保護回路。1. In a single-phase three-wire or two-wire single-winding coil type transformer, two sets of main coils connected to an input terminal are wound around a single-phase inner iron core in two circuit phases, and each of these circuits Between the ends of the main coil, a plurality of sets of exciting coils wound around the core and connected in series with each other are connected by a plurality of combination wires, and the voltage value of the voltage sensor connected to the input terminal is used. , A plurality of sets of thyristors that are turned on and off are provided between the ends and between the exciting coils,
By turning on or off each of these thyristors, one or more sets are connected or cut between the ends and each exciting coil, and a circuit for boosting, equalizing, or stepping down the output voltage with respect to the input voltage is uninterrupted. A protection circuit for a power-saving transformer with a lifting and lowering same voltage autonomous switching device, characterized in that a time difference closed circuit is provided on the output side of the main coil of the power-saving transformer with a lifting and lowering same voltage autonomous switching device. .
は遅延回路と開閉器とからなる請求項１に記載の昇降同
圧自律切替装置付き省電力変圧器の保護回路。2. The protection circuit for a power-saving transformer with a step-up / down same-voltage autonomous switching device according to claim 1, wherein the time difference closing circuit provided on the output side of the main coil comprises a delay circuit and a switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13490797A JP3413346B2 (en) | 1997-05-26 | 1997-05-26 | Protection circuit of power saving transformer with autonomous switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13490797A JP3413346B2 (en) | 1997-05-26 | 1997-05-26 | Protection circuit of power saving transformer with autonomous switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10327532A JPH10327532A (en) | 1998-12-08 |
| JP3413346B2 true JP3413346B2 (en) | 2003-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13490797A Expired - Fee Related JP3413346B2 (en) | 1997-05-26 | 1997-05-26 | Protection circuit of power saving transformer with autonomous switching device |
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| Country | Link |
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| JP (1) | JP3413346B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100705452B1 (en) | 2006-04-25 | 2007-04-09 | 지훈 류 | A power saver |
| JP4999154B2 (en) * | 2006-11-24 | 2012-08-15 | 学校法人日本大学 | Reduced voltage starting device |
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1997
- 1997-05-26 JP JP13490797A patent/JP3413346B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10327532A (en) | 1998-12-08 |
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