JPH0454513A - Switch-capacitor ac step-down circuit - Google Patents
Switch-capacitor ac step-down circuitInfo
- Publication number
- JPH0454513A JPH0454513A JP16626890A JP16626890A JPH0454513A JP H0454513 A JPH0454513 A JP H0454513A JP 16626890 A JP16626890 A JP 16626890A JP 16626890 A JP16626890 A JP 16626890A JP H0454513 A JPH0454513 A JP H0454513A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output voltage
- capacitor
- switch
- division coefficient
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 32
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 241000143252 Idaea infirmaria Species 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Ac-Ac Conversion (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明はトランスレス交流降圧器、とくにノイズしな
いキャパシタ分圧交流電源に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transformerless AC step-down converter, and particularly to a noise-free capacitor divided voltage AC power supply.
「従来の技術」
交流回路において、キャノし夕で分圧できることしかし
ながら、それを交流降圧器に応用すると出力特性は悪く
、特にインダクタンス型負荷の場合には出力電圧が異常
に高くなり、安定な出力電圧が得られなくなるという問
題があった。よい出力特性を求めるためには、分圧用キ
ャパシタの値が充分大きくなければならない。結局大電
力場合にはトランス交流降圧器と比べて体積が大きすぎ
るという問題があった。``Prior art'' In an AC circuit, it is possible to divide the voltage with a voltage converter. However, when applied to an AC step-down converter, the output characteristics are poor, and especially in the case of an inductance type load, the output voltage becomes abnormally high, making it difficult to maintain a stable output. There was a problem that voltage could not be obtained. In order to obtain good output characteristics, the value of the voltage dividing capacitor must be sufficiently large. After all, in the case of high power, there was a problem that the volume was too large compared to the transformer AC step-down converter.
「課題を解決するための手段」
そこで、本発明は、こうしたキャパシタ分圧交流電源に
おいて、第１〜第５図のように、電工を検出する比較回
路（１）と、この比較回路の出力信号に制御されたスイ
ッチング素子（２）を設け、上記のスイッチング素子の
切り替えでキャパシタの接続関係を変換させて、キャパ
シタ分圧係数を変わらせることにより、出力電圧を設定
られた範囲に入らせるという手段で上記問題を解決する
。``Means for Solving the Problems'' Therefore, the present invention provides, in such a capacitor divided voltage AC power supply, a comparison circuit (1) for detecting an electrician, and an output signal of this comparison circuit, as shown in FIGS. 1 to 5. A means for controlling the output voltage to fall within a set range by providing a switching element (2) controlled by the switching element, changing the capacitor connection relationship by switching the switching element, and changing the capacitor voltage division coefficient. will solve the above problem.
代表的な回路としては、第１図のようにスイッチは、古
くから公知されている。As a typical circuit, a switch as shown in FIG. 1 has been known for a long time.
ング素子をキャパシタと並列してなる。ｉｌｉ ７１１
形と、第２図のようにスイッチング素子をキャパシタと
直列してなる直列形と、第３図のような混合形および一
つキャパシタを上か下か中かと並列できる多用形と、！
ｓ４図のように幾つかスイッチング素子を使って二つキ
ャパシタを直列か並列かしないかに変換できる多用形な
どを上げられる。更に、出力電圧の調整幅を減少するた
め、第５図のように復数個スイッチ・キャパシタ組を使
ってよい。A capacitor is connected in parallel with a capacitor. ili 711
A series type in which a switching element is connected in series with a capacitor as shown in Fig. 2, a mixed type as shown in Fig. 3, and a multi-use type in which one capacitor can be connected in parallel above, below, or in the middle.
As shown in figure s4, there is a multi-use type that uses several switching elements to convert two capacitors into series, parallel, or not. Furthermore, in order to reduce the adjustment width of the output voltage, multiple switched capacitor sets may be used as shown in FIG.
「作用」 第３図の例を上げて本発明の詳細な説明する。"action" The present invention will be described in detail using the example shown in FIG.
図３において、Ｃ２と０３は交流分圧用キャノじり、Ｃ
１とＣ４は補償用キャパシタである。In Fig. 3, C2 and 03 are AC partial pressure canisters, C
1 and C4 are compensation capacitors.
出力電圧の変動は主として入力電圧の変動および負荷の
変動のため生じたものと考えらｎる。そこで第３図内に
おいて、比較回路ＩＡは入力電圧を監視し、ある電圧を
越えるとスイッチ２Ａは０ＦＦｔろため、直列キャパシ
タンスが減少し、分圧係数が低くなり、出力電圧の上昇
を抑える。一方、ある電圧を越えないとスイッチ２Ａは
ＯＮｉるた力、直列キャパシタンスが増加し、分圧係数
が高くなり、出力電圧の降下を防止する。It is considered that the fluctuation in the output voltage is mainly caused by the fluctuation in the input voltage and the fluctuation in the load. Therefore, in FIG. 3, the comparator circuit IA monitors the input voltage, and when a certain voltage is exceeded, the switch 2A turns OFF, reducing the series capacitance, lowering the voltage division coefficient, and suppressing a rise in the output voltage. On the other hand, if the voltage does not exceed a certain level, the switch 2A will turn ON, the series capacitance will increase, the voltage division coefficient will become high, and a drop in the output voltage will be prevented.
同じように比較回路ＩＢは出力電圧を盃視し、ある電圧
を越えるとスイッチ２ＢはＯＮＴろため、並列キャパシ
タンスが増加し、分圧係数が低くなり、出力電圧の上昇
を抑える。一方、ある電圧を越えないとスイッチ２Ｂは
０ＦＦＴろため、並列キャパシタンスが減少し、分圧係
数が高くなり、出力電圧の降下を防止する。Similarly, the comparator circuit IB monitors the output voltage, and when a certain voltage is exceeded, the switch 2B becomes an ONT filter, increasing the parallel capacitance, lowering the voltage division coefficient, and suppressing a rise in the output voltage. On the other hand, if the voltage does not exceed a certain level, the switch 2B becomes 0FFT, so the parallel capacitance decreases, the voltage division coefficient increases, and a drop in the output voltage is prevented.
もっと低い電圧も越えないと、スイッチ２ＣはＯＮＴろ
ため、直列キャパシタンスが増加し１分圧係数がもっと
高くなり、出力電圧を上昇させる。If a lower voltage is not exceeded, the switch 2C will act as an ONT filter, and the series capacitance will increase, the voltage division coefficient will become higher, and the output voltage will increase.
以下、実施例を上げっで一歩進んで説明する。The following is a step-by-step explanation using examples.
「実施例」
第６図は、本発明を海外旅行用変圧器に実施するの一例
である。その原理的な等価回路は図３に示した。ここで
、主としてその比較回路（１）とスイッチング素子（２
）の具体的な構成について説明しよう。"Embodiment" FIG. 6 is an example of implementing the present invention into a transformer for overseas travel. The principle equivalent circuit is shown in FIG. Here, the comparison circuit (1) and the switching element (2) are mainly used.
) Let's explain the specific structure of .
比較回路Ｌ Ａ、ｌ ＢとＩＣの構成はほぼ同じである
、ただしＩＢとＩＣを同時にＯＮＬないようにそれぞれ
の設定電圧値に注意しなければならない、比較回路ＩＡ
は商用交流電圧が低圧系（１１０Ｖ−１３０Ｖ）が高圧
系（２００Ｖ−２４０Ｖ）かを判断するに使うから、お
おざっばでよし１゜
比較回路内において整流用ダイオードＤＩとＣ５、Ｒ，
１，Ｗからなる積分回路は入力または出力電圧の有効値
を検出し、Ｒ１とＷに分圧されて比較用電圧を出力する
。比較器は立ち上がりと立ち下がりの入力電圧がそれぞ
れ設定できるシュミット・トリ ガ素子を用いる。The configurations of comparator circuits LA, IB, and IC are almost the same, but care must be taken to set each voltage value so that IB and IC are not ON at the same time.Comparison circuit IA
is used to determine whether the commercial AC voltage is a low-voltage system (110V-130V) or a high-voltage system (200V-240V).
1, W detects the valid value of the input or output voltage, divides it into R1 and W, and outputs a voltage for comparison. The comparator uses a Schmitt trigger element whose rising and falling input voltages can be set separately.
スイッチング素子は双方向サイリスタＴＲＩＡＣとその
トリガ回路からなる。２ Ａ、２ Ｂ、２ Ｃはそれぞ
れ比較回路のＬ Ａ、Ｉ Ｂ、Ｉ Ｃに対応し、フォト
・カブラでつながている。フォト・カプラの投光器ＩＪ
Ｄは上記比較回路内に設け、その対応する受光器２丁は
スイッチング素子のトリガ回路内に設ける。トリガ回路
において、四つの整流用ダイオードＤをブリッジ状に接
続されている。ＴＩは反相用トランジスタ、Ｔ２は駆動
用トランジスタ、Ｒ２，Ｒ３は限流用抵抗である。The switching element consists of a bidirectional thyristor TRIAC and its trigger circuit. 2A, 2B, and 2C correspond to LA, IB, and IC of the comparator circuit, respectively, and are connected by a photocoupler. Photo coupler floodlight IJ
D is provided in the comparison circuit, and two corresponding photodetectors are provided in the trigger circuit of the switching element. In the trigger circuit, four rectifying diodes D are connected in a bridge configuration. TI is an anti-phase transistor, T2 is a driving transistor, and R2 and R3 are current-limiting resistors.
商用交流電源は低圧系（ＩＩＯＶ−１３０Ｖ）なら、比
較回路ＩＡ内のＬＥＤが付き、対応するスイッチング素
子２ＡがＯＮするため、直列キャパシタンスが０２にな
る。If the commercial AC power source is a low voltage system (IIOV-130V), the LED in the comparator circuit IA is turned on and the corresponding switching element 2A is turned on, so the series capacitance becomes 02.
商用交流電源は高圧系（２００Ｖ−２４０Ｖ）なら、比
較回路ＩＡ内のＬＥＤが消し、対応するスイッチング素
子２ＡがＯＦＦ″′ｆるため、直列キャパシタンスが０
１・Ｃ２／（Ｃ１十Ｃ２）になる。If the commercial AC power supply is a high voltage system (200V-240V), the LED in the comparator circuit IA is turned off and the corresponding switching element 2A is turned off, so the series capacitance becomes 0.
It becomes 1・C2/(C10C2).
出力電圧はある電圧、例えば１ｌＯＶを越えると、比較
回路ＩＣ内のＬＥＤが付き、対応するスイッチング素子
２Ｃが０ＦＦＴろため、補償用キャパシタＣ４が直列キ
ャパシタから外られる。出力電圧はもっと高く、例えば
１１５ｖを越えると、比較回路ＩＢ内のＬＥＤが付き、
対応するスイッチング素子２日がＯＮ″ｉろため、補償
用キャパシタＣ４が並列キャパシタＣ３に付けられる。When the output voltage exceeds a certain voltage, for example 11OV, the LED in the comparator IC turns on, the corresponding switching element 2C goes 0FFT, and the compensation capacitor C4 is removed from the series capacitor. The output voltage is higher, for example, when it exceeds 115V, the LED in the comparator circuit IB lights up.
Since the corresponding switching element 2 is turned on, a compensating capacitor C4 is attached to the parallel capacitor C3.
逆に、出力電圧はある電圧、例えば９５Ｖまで下がると
、比較回路ＩＢ内のり、ＥＤが消し、対応するスイッチ
ング素子２ＢがＯＦＦするため、補償用キャパシタＣ４
が並列キャパシタＣ３から外られる 出力電圧はもっと
低く、例えば９０Ｖまでに下がると、比較回路ｌＣ内の
ＬＥＤが消し、対応するスイッチング素子２ＣがＯＮす
るため、補償用キャパシタＣ４が直列キャパシタに付け
られる。Conversely, when the output voltage drops to a certain voltage, for example 95V, the voltage and ED in the comparator circuit IB are turned off and the corresponding switching element 2B is turned off, so that the compensation capacitor C4
is removed from the parallel capacitor C3. When the output voltage drops to a lower value, for example 90V, the LED in the comparator circuit 1C is turned off and the corresponding switching element 2C is turned on, so that the compensation capacitor C4 is attached to the series capacitor.
図５において、Ｒ４とＲ５とも突入電流を抑えるための
抵抗である。Ｒ５は大電力場合、サミスタの方がいい、
Ｒ６，Ｒ７は制動用サミスタ、Ｒ８、Ｃ８ＤＺからなる
定電圧直流電源。In FIG. 5, both R4 and R5 are resistors for suppressing rush current. For R5, Samista is better for high power.
R6 and R7 are constant voltage DC power supplies consisting of braking thermistors, R8 and C8DZ.
「発明の効果」
キャパシタ分圧方法を交流降圧響に適用すると、出力特
性が悪く、特にインダクタンス型負荷の場合に出力電圧
が異常に高くなり、安定な出力電圧が得られなくなると
いう問題に対して、本発明はスイッチング素子を使って
、キャパシタの接続関係を変換させて、キャパシタ分圧
係数を変わらせることにより、出力電圧を決められた範
囲に入らせるというほぼ無損失な手段で上記問題を解決
した。トランス降圧回路に比べると、軽量だけでなく、
体積もずっと小さくなった。配電線路を低電圧系から高
電圧系へ移行するにも役に立つ。``Effects of the Invention'' When the capacitor voltage division method is applied to AC step-down acoustics, the output characteristics are poor and the output voltage becomes abnormally high, especially in the case of an inductance type load, making it impossible to obtain a stable output voltage. The present invention solves the above problem by using a switching element to change the capacitor connection relationship and change the capacitor voltage division coefficient, thereby bringing the output voltage within a predetermined range, which is an almost lossless means. did. Compared to transformer step-down circuits, it is not only lightweight;
The volume is also much smaller. It is also useful for transitioning power distribution lines from low-voltage to high-voltage systems.
第１図〜第５図は本発明の代表的な構成回路図である。
第６図は、本発明を海外旅行用変圧蕃に実施するの一例
である。
１は比較回路 Ａ−Ｘはその番号
２はスイッチング素子 Ａ−Ｘはその番号Ｃ２とＣ３は
交流分圧用キャパシタ
Ｃ１とＣ４は補償用キャパシタ
Ｒ４とＲ５は突入電流を抑えるための抵抗とサミスタ
Ｒ８，Ｒ７は制動用サミスタ
Ｒ８，Ｃ８，ＤＺからなる定電圧直流電源３ＺＬは変波
負荷1 to 5 are typical configuration circuit diagrams of the present invention. FIG. 6 is an example of implementing the present invention in a transformer for overseas travel. 1 is a comparison circuit A-X is the number 2 is the switching element A-X is the number C2 and C3 are the AC voltage dividing capacitors C1 and C4 are the compensation capacitors R4 and R5 are the resistors and thermister R8 to suppress the rush current, R7 is a constant voltage DC power supply consisting of braking samisters R8, C8, and DZ. 3ZL is a variable wave load.
Claims (1)
おいて、電圧を検出する比較回路（１）と、この比較回
路の出力信号に制御されたスイッチング素子（２）を設
け、上記のスイッチング素子の切り替えでキャパシタの
接続関係を変換させてキャパシタ分圧係数を変わらせる
ことにより、出力電圧を決められた範囲に入らせること
を特徴とするスイッチ・キャパシタ交流降圧回路。1 As shown in Figures 1 to 5, in a capacitor divided voltage AC power supply, a comparison circuit (1) for detecting voltage and a switching element (2) controlled by the output signal of this comparison circuit are provided, and the above switching A switched capacitor AC step-down circuit characterized in that the output voltage falls within a predetermined range by changing the capacitor connection relationship by switching elements and changing the capacitor voltage division coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16626890A JP2847425B2 (en) | 1990-06-25 | 1990-06-25 | Capacitor AC step-down circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16626890A JP2847425B2 (en) | 1990-06-25 | 1990-06-25 | Capacitor AC step-down circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0454513A true JPH0454513A (en) | 1992-02-21 |
| JP2847425B2 JP2847425B2 (en) | 1999-01-20 |
Family
ID=15828237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16626890A Expired - Lifetime JP2847425B2 (en) | 1990-06-25 | 1990-06-25 | Capacitor AC step-down circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2847425B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6284978B1 (en) | 1999-06-17 | 2001-09-04 | Logitech, Inc. | Cable management for system peripheral device |
| US7042204B2 (en) | 2002-02-06 | 2006-05-09 | Nitta Corporation | Voltage source and current source with capacitor |
| JP2011211898A (en) * | 2010-03-26 | 2011-10-20 | Johnson Electric Sa | Power supply circuit, and motor device |
| JP5788616B1 (en) * | 2015-02-04 | 2015-10-07 | 株式会社京三製作所 | High frequency power supply and dual cathode power supply |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3225271B2 (en) | 1990-08-13 | 2001-11-05 | 国華 王 | Electronic AC step-down circuit |
-
1990
- 1990-06-25 JP JP16626890A patent/JP2847425B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6284978B1 (en) | 1999-06-17 | 2001-09-04 | Logitech, Inc. | Cable management for system peripheral device |
| US7042204B2 (en) | 2002-02-06 | 2006-05-09 | Nitta Corporation | Voltage source and current source with capacitor |
| JP2011211898A (en) * | 2010-03-26 | 2011-10-20 | Johnson Electric Sa | Power supply circuit, and motor device |
| JP5788616B1 (en) * | 2015-02-04 | 2015-10-07 | 株式会社京三製作所 | High frequency power supply and dual cathode power supply |
| WO2016125316A1 (en) * | 2015-02-04 | 2016-08-11 | 株式会社京三製作所 | Radio frequency power source device, and power source for dual cathodes |
| CN107211521A (en) * | 2015-02-04 | 2017-09-26 | 株式会社京三制作所 | High intensity light source and twin cathode power supply |
| US10244615B2 (en) | 2015-02-04 | 2019-03-26 | Kyosan Electric Mfg. Co., Ltd. | Radio frequency power source device, and power source for dual cathodes |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2847425B2 (en) | 1999-01-20 |
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