JPH0695809B2 - Ripple filter circuit - Google Patents
Ripple filter circuitInfo
- Publication number
- JPH0695809B2 JPH0695809B2 JP61147557A JP14755786A JPH0695809B2 JP H0695809 B2 JPH0695809 B2 JP H0695809B2 JP 61147557 A JP61147557 A JP 61147557A JP 14755786 A JP14755786 A JP 14755786A JP H0695809 B2 JPH0695809 B2 JP H0695809B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- ripple
- input terminal
- resistor
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 19
- 238000009499 grossing Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Direct Current Feeding And Distribution (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は、電源のリツプル電圧を除去するためのリツプ
ルフイルタ回路に関する。Description: TECHNICAL FIELD The present invention relates to a ripple filter circuit for removing a ripple voltage of a power supply.
(従来の技術) 従来、リツプルフイルタ回路としては、第4図に示すよ
うなコイルLとコンデンサC1よりなる受動回路および第
5図に示すようなトランジスタTrとコンデンサC2と抵抗
Rを用いた能動回路とがあつた。(Prior Art) Conventionally, as a ripple filter circuit, a passive circuit including a coil L and a capacitor C1 as shown in FIG. 4 and an active circuit using a transistor Tr, a capacitor C2 and a resistor R as shown in FIG. There was a circuit.
(発明が解決しようとする問題点) 前者は、リツプル除去効果を大きくし、かつ出力抵抗を
小さくしようとすると、コイルのインダクタンスとコン
デンサの容量の積を大きくし、しかもコイルの直流抵抗
を小さくしなければならないため、コイルおよびコンデ
ンサが大形化し、経済的負担が増大し、また入力電圧の
過渡的な変動により出力電圧が減衰振動するという欠点
があつた。(Problems to be solved by the invention) In the former case, when the ripple removal effect is increased and the output resistance is decreased, the product of the inductance of the coil and the capacitance of the capacitor is increased, and further, the DC resistance of the coil is decreased. Since it has to be done, the coil and the capacitor are increased in size, the economical burden is increased, and the output voltage is attenuated and oscillated due to the transient fluctuation of the input voltage.
後者は、リツプル除去効果と低出力抵抗が相反し、ま
た、入出力電圧差が約1V以上必要となり電圧利用効率が
低下するという欠点があつた。The latter has the drawbacks that the ripple removal effect and the low output resistance conflict with each other, and the input / output voltage difference of about 1 V or more is required, which lowers the voltage utilization efficiency.
本発明の目的は出力電圧が入力電圧のリツプルの谷の電
圧になるように制御することにより上述の欠点を解決し
たリツプルフイルタ回路を提供することにある。An object of the present invention is to provide a ripple filter circuit which solves the above-mentioned drawbacks by controlling the output voltage so that it becomes the voltage of the ripple valley of the input voltage.
(問題点を解決するための手段) 前記目的を達成するために本発明によるリップルフィル
タ回路は、入力電圧を制御回路とリップル電圧検出回路
に供給し、前記リップル電圧検出回路は、入力電圧に重
畳したリップル電圧の振幅を検出する振幅検出手段と、
前記検出されたリップル電圧を負の半サイクルのピーク
電圧で検出ホールドして直流電圧に変換し送出する変換
手段とからなり、前記制御回路は、制御手段の出力電圧
と前記リップル電圧検出回路からの直流電圧を加える加
算手段と、前記加算手段の出力電圧と、前記入力電圧を
平滑した直流電圧を比較し、その差が生じないように出
力電圧を制御する制御手段とを含み、入力電圧のリップ
ルの谷の電圧になるような出力電圧を得るように構成さ
れている。(Means for Solving the Problems) In order to achieve the above object, a ripple filter circuit according to the present invention supplies an input voltage to a control circuit and a ripple voltage detection circuit, and the ripple voltage detection circuit superimposes on the input voltage. Amplitude detection means for detecting the amplitude of the ripple voltage,
The detected ripple voltage is detected and held at a peak voltage of a negative half cycle and converted into a DC voltage, and is sent out.The control circuit outputs the output voltage of the control means and the ripple voltage detection circuit. A ripple of the input voltage is included, which includes an adding means for applying a DC voltage, a control means for comparing the output voltage of the adding means with a DC voltage obtained by smoothing the input voltage, and controlling the output voltage so as not to cause a difference therebetween. It is configured to obtain an output voltage such that it becomes a valley voltage.
(実施例) 以下、図面を参照して本発明をさらに詳しく説明する。(Example) Hereinafter, the present invention will be described in more detail with reference to the drawings.
第1図は本発明によるリツプルフイルタ回路の実施例を
示すブロツク図である。4は入力端子、10は出力端子で
ある。FIG. 1 is a block diagram showing an embodiment of a ripple filter circuit according to the present invention. Reference numeral 4 is an input terminal and 10 is an output terminal.
入力端子4に印加された入力電圧は、制御回路1の入力
端子5とリツプル電圧検出回路2の入力端子7とDC−DC
コンバーター3の入力端子9に接続される。リツプル電
圧検出回路2の出力は、制御回路1の制御入力端子6に
接続され、DC−DCコンバータ3の出力は、リツプル電圧
検出回路2の負電源端子8に接続される。The input voltage applied to the input terminal 4 is applied to the input terminal 5 of the control circuit 1, the input terminal 7 of the ripple voltage detection circuit 2, and the DC-DC.
It is connected to the input terminal 9 of the converter 3. The output of the ripple voltage detection circuit 2 is connected to the control input terminal 6 of the control circuit 1, and the output of the DC-DC converter 3 is connected to the negative power supply terminal 8 of the ripple voltage detection circuit 2.
第2図は制御回路およびリツプル電圧検出回路の詳細を
示す図である。第2図において同一機能を有する部分に
は、同一番号を付してある。FIG. 2 is a diagram showing details of the control circuit and the ripple voltage detection circuit. In FIG. 2, parts having the same function are given the same numbers.
制御回路1の入力端子5は、トランジスタ11のエミツ
タ、抵抗12、抵抗18およびオペアンプ15の正電源端子に
接続される。トランジスタ11のベースは抵抗12の他端と
トランジタ13のコレクタに接続される。トランジスタ11
のコレクタは、抵抗16と出力端子10に接続される。抵抗
18の他端は抵抗19とコンデンサ20とオペアンプ15の非反
転入力端子22へ接続される。抵抗16の他端は、抵抗17と
オペアンプ15の反転入力端子21へ接続され、抵抗17の他
端は、制御回路1の制御入力端子6へ接続される。オペ
アンプ15の出力端子は、抵抗14を介してトランジスタ13
のベースに接続される。抵抗19、コンデンサ20の他端、
トランジスタ13のエミツタおよびオペアンプ15の負電源
端子は接地される。The input terminal 5 of the control circuit 1 is connected to the emitter of the transistor 11, the resistor 12, the resistor 18, and the positive power supply terminal of the operational amplifier 15. The base of the transistor 11 is connected to the other end of the resistor 12 and the collector of the transistor 13. Transistor 11
The collector of is connected to the resistor 16 and the output terminal 10. resistance
The other end of 18 is connected to the resistor 19, the capacitor 20, and the non-inverting input terminal 22 of the operational amplifier 15. The other end of the resistor 16 is connected to the resistor 17 and the inverting input terminal 21 of the operational amplifier 15, and the other end of the resistor 17 is connected to the control input terminal 6 of the control circuit 1. The output terminal of the operational amplifier 15 is connected to the transistor 13 via the resistor 14.
Connected to the base of. Resistor 19, the other end of capacitor 20,
The emitter of the transistor 13 and the negative power supply terminal of the operational amplifier 15 are grounded.
この実施例では制御手段は、オペアンプ15,抵抗12,14,1
8,19,トランジスタ11,13およびコンデンサ20よりなる部
分が、加算手段は抵抗16および17よりなる部分がそれぞ
れ相当する。In this embodiment, the control means is an operational amplifier 15, resistors 12, 14, 1
8, 19 and transistors 11 and 13 and capacitor 20 correspond to the adding means, and adding means corresponds to the resistors 16 and 17 respectively.
一方、リツプル電圧検出回路2の入力端子7はオペアン
プ26とオペアンプ32の正電源端子に接続され、さらにコ
ンデンサ23と抵抗24の直列接続を通してオペアンプ26の
反転入力端子、抵抗31およびダイオード27のアノードに
接続される。ダイオード27のカソードはオペアンプ26の
出力端子とダイオード28のアノードの接続点に接続され
る。ダイオード28のカソードは、コンデンサ29、抵抗30
およびオペアンプ32の非反転入力端子の接続点に接続さ
れる。抵抗31の他端はオペアンプ32の反転入力端子とオ
ペアンプ32の出力端子とともに制御回路1の制御入力端
子6に接続される。オペアンプ26の非反転入力端子、コ
ンデンサ29、および抵抗30の他端は接地される。オペア
ンプ26とオペアンプ32の負電源端子は、リツプル電圧検
出回路2の負電源端子8に接続される。On the other hand, the input terminal 7 of the ripple voltage detection circuit 2 is connected to the positive power supply terminals of the operational amplifier 26 and the operational amplifier 32, and is further connected to the inverting input terminal of the operational amplifier 26, the resistor 31 and the anode of the diode 27 through the series connection of the capacitor 23 and the resistor 24. Connected. The cathode of the diode 27 is connected to the connection point between the output terminal of the operational amplifier 26 and the anode of the diode 28. The cathode of the diode 28 is a capacitor 29 and a resistor 30.
And the non-inverting input terminal of the operational amplifier 32. The other end of the resistor 31 is connected to the control input terminal 6 of the control circuit 1 together with the inverting input terminal of the operational amplifier 32 and the output terminal of the operational amplifier 32. The non-inverting input terminal of the operational amplifier 26, the capacitor 29, and the other end of the resistor 30 are grounded. The negative power supply terminals of the operational amplifier 26 and the operational amplifier 32 are connected to the negative power supply terminal 8 of the ripple voltage detection circuit 2.
この実施例では振幅検出手段は、コンデンサ23,抵抗24,
31,オペアンプ26およびダイオード27よりなる部分が、
交換手段はダイオード28,コンデンサ29,抵抗30およびオ
ペアンプ32よりなる部分がそれぞれ相当する。In this embodiment, the amplitude detecting means includes a capacitor 23, a resistor 24,
31, the part consisting of operational amplifier 26 and diode 27
The exchanging means corresponds to a portion including a diode 28, a capacitor 29, a resistor 30, and an operational amplifier 32.
第3図は各部分の波形を示す図である。以下、第3図も
参照しながら動作について説明する。FIG. 3 is a diagram showing the waveform of each part. The operation will be described below with reference to FIG.
入力端子4に印加されたリツプル電圧を含む入力電圧A
は、リツプル電圧検出回路2の入力端子7に印加され
る。この入力電圧は、コンデンサ23によりリツプル電圧
Bだけが取り出され、抵抗24、オペアンプ26、ダイオー
ド27、ダイオード28、コンデンサ29、抵抗30、抵抗31、
オペアンプ32により構成されるリツプル電圧検出回路
(ピークホールド回路)により、リツプル電圧の負の半
サイクルのピーク電圧が、正の直流電圧C(Vr)となつ
て出力される。ダイオード28は帰還ループの中にあつ
て、理想ダイオードとして動作する。Input voltage A including ripple voltage applied to input terminal 4
Is applied to the input terminal 7 of the ripple voltage detection circuit 2. Of this input voltage, only the ripple voltage B is taken out by the capacitor 23, and the resistor 24, the operational amplifier 26, the diode 27, the diode 28, the capacitor 29, the resistor 30, the resistor 31,
The ripple voltage detection circuit (peak hold circuit) configured by the operational amplifier 32 outputs the peak voltage of the negative half cycle of the ripple voltage as the positive DC voltage C (Vr). Diode 28 acts as an ideal diode in the feedback loop.
また、ピークホールド回路の充電時定数は、ダイオード
28の内部抵抗とコンデンサ29の容量の積で決まり放電時
定数は抵抗30の抵抗値とコンデンサ29の容量の積で決ま
る。The charging time constant of the peak hold circuit is
It is determined by the product of the internal resistance of 28 and the capacitance of the capacitor 29, and the discharge time constant is determined by the product of the resistance value of the resistor 30 and the capacitance of the capacitor 29.
オペアンプ15の非反転入力端子22には、入力電圧A(Vi
n)を抵抗18と抵抗19で分圧し、コンデンサ20により平
均化された電圧が印加される。The non-inverting input terminal 22 of the operational amplifier 15 has an input voltage A (Vi
n) is divided by resistors 18 and 19, and the averaged voltage is applied by the capacitor 20.
一方、反転入力端子21には、出力電圧V0が抵抗16を通し
て、リツプル電圧のピーク値Vrが抵抗17を通して印加さ
れる。On the other hand, the output voltage V 0 is applied to the inverting input terminal 21 through the resistor 16, and the peak value Vr of the ripple voltage is applied through the resistor 17.
いま、抵抗18と抵抗19を同じ値に、また、抵抗16と抵抗
17を同じ値にすれば、非反転入力端子22にはVin/2が、
反転入力端子21には(V0+Vr)/2がそれぞれ印加され
る。このときオペアンプ15、抵抗14、トランジスタ13、
抵抗12およびトランジスタ11から構成される負帰還回路
により、非反転入力端子22と反転入力端子21が同電位と
なるように動作する。つまり Vin/2=(V0+Vr)/2より V0=Vin−Vr(第3図D) となり、出力電圧D(V0)は、入力電圧A(Vin)より
リツプル電圧の負の半サイクルのピーク値だけ低い値と
なる。Now, set resistance 18 and resistance 19 to the same value, and resistance 16 and resistance
If 17 is set to the same value, Vin / 2 is applied to the non-inverting input terminal 22,
(V 0 + Vr) / 2 is applied to the inverting input terminal 21, respectively. At this time, the operational amplifier 15, the resistor 14, the transistor 13,
The negative feedback circuit composed of the resistor 12 and the transistor 11 operates so that the non-inverting input terminal 22 and the inverting input terminal 21 have the same potential. In other words, Vin / 2 = (V 0 + Vr) / 2, so V 0 = Vin−Vr (Fig. 3D), and the output voltage D (V 0 ) is the negative half cycle of the ripple voltage from the input voltage A (Vin). Only the peak value of is low.
(発明の効果) 以上、詳しく説明したように本発明は、出力電圧が入力
電圧のリツプルの谷の電圧になるように制御する構成で
あるので、入力電圧にリツプル分がほとんどない場合
は、出力電圧はトランジスタにより生ずる電圧降下分低
い電圧値となり、入出力電圧差は少なく、また、入力電
圧にリツプル分がある場合は出力電圧は、入力電圧のリ
ツプルの谷の電圧となる。(Effects of the Invention) As described in detail above, the present invention has a configuration in which the output voltage is controlled to the voltage of the ripple valley of the input voltage. Therefore, when the input voltage has almost no ripple, The voltage becomes a voltage value lower by the voltage drop caused by the transistor, the input / output voltage difference is small, and when the input voltage has a ripple, the output voltage becomes the voltage of the ripple valley of the input voltage.
したがつて、リツプルの大小に関係なく、リツプル分を
除去する従来回路に比較し、入出力電圧差が少なく、リ
ツプル除去効果も大きくなる。しかも、リツプル振幅電
圧を加えた出力電圧と入力電圧とを比較し、その誤差が
生じないようにトランジスタを制御する構成であるの
で、出力抵抗も小さくなるという効果がある。Therefore, regardless of the size of the ripple, the difference in input / output voltage is small and the ripple removing effect is large as compared with the conventional circuit that removes the ripple. Moreover, the output voltage added with the ripple amplitude voltage is compared with the input voltage, and the transistor is controlled so that the error does not occur, so that the output resistance is also reduced.
第1図は本発明によるリツプルフイルタ回路の実施例を
示す図、第2図は本発明における制御回路およびリツプ
ル電圧検出回路の具体的回路図である。 第3図は第1図および第2図の回路の各部の波形図、第
4図および第5図は従来のリツプルフイルタ回路を示す
図である。 1……制御回路 2……リツプル電圧検出回路(ピークホールド回路) 3……DC−DCコンバータ 4……入力端子、5……制御回路の入力端子 6……制御回路の制御入力端子 7……リツプル電圧検出回路の入力端子 8……リツプル電圧検出回路の負電源端子 9……DC−DCコンバータの入力端子 10……出力端子、11,13……トランジスタ 12,14,16,17,18,19,24,30,31……抵抗 15,26,32……オペアンプ 20,23,29……コンデンサ 21……オペアンプ15の反転入力端子 22……オペアンプ22の非反転入力端子 25……ピークホールド回路入力端子 27,28……ダイオードFIG. 1 is a diagram showing an embodiment of a ripple filter circuit according to the present invention, and FIG. 2 is a concrete circuit diagram of a control circuit and a ripple voltage detection circuit in the present invention. FIG. 3 is a waveform diagram of each part of the circuits of FIGS. 1 and 2, and FIGS. 4 and 5 are diagrams showing a conventional ripple filter circuit. 1 ... Control circuit 2 ... Ripple voltage detection circuit (peak hold circuit) 3 ... DC-DC converter 4 ... Input terminal, 5 ... Control circuit input terminal 6 ... Control circuit control input terminal 7 ... Input terminal of ripple voltage detection circuit 8 …… Negative power supply terminal of ripple voltage detection circuit 9 …… DC-DC converter input terminal 10 …… Output terminal, 11,13 …… Transistor 12,14,16,17,18, 19,24,30,31 …… Resistance 15,26,32 …… Op Amp 20,23,29 …… Capacitor 21 …… Inverting input terminal of Opamp 15 22 …… Non-inverting input terminal of Opamp 22 …… Peak hold Circuit input terminals 27, 28 ... Diode
Claims (1)
路に供給し、 前記リップル電圧検出回路は、入力電圧に重畳したリッ
プル電圧の振幅を検出する振幅検出手段と、 前記検出されたリップル電圧を負の半サイクルのピーク
電圧で検出ホールドして直流電圧に変換し送出する変換
手段とからなり、 前記制御回路は、制御手段の出力電圧と前記リップル電
圧検出回路からの直流電圧を加える加算手段と、 前記加算手段の出力電圧と、前記入力電圧を平滑した直
流電圧を比較し、その差が生じないように出力電圧を制
御する制御手段とを含み、 入力電圧のリップルの谷の電圧になるような出力電圧を
得るように構成したことを特徴とするリップルフィルタ
回路。1. An input voltage is supplied to a control circuit and a ripple voltage detection circuit, said ripple voltage detection circuit detecting the amplitude of the ripple voltage superimposed on the input voltage, and the detected ripple voltage. And a conversion means for detecting and holding at a peak voltage of a negative half cycle and converting to a DC voltage to send out, the control circuit adding means for adding the output voltage of the control means and the DC voltage from the ripple voltage detection circuit. , Including a control means for comparing the output voltage of the adding means with a DC voltage obtained by smoothing the input voltage and controlling the output voltage so as not to generate a difference between the output voltage of the adding means and the ripple voltage of the ripple of the input voltage. Ripple filter circuit characterized by being configured to obtain a stable output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147557A JPH0695809B2 (en) | 1986-06-24 | 1986-06-24 | Ripple filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147557A JPH0695809B2 (en) | 1986-06-24 | 1986-06-24 | Ripple filter circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS633624A JPS633624A (en) | 1988-01-08 |
| JPH0695809B2 true JPH0695809B2 (en) | 1994-11-24 |
Family
ID=15433030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61147557A Expired - Lifetime JPH0695809B2 (en) | 1986-06-24 | 1986-06-24 | Ripple filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0695809B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7552718B2 (en) * | 2007-06-12 | 2009-06-30 | Delphi Technologies, Inc. | Electrical drive arrangement for a fuel injection system |
| JP7027989B2 (en) * | 2018-03-19 | 2022-03-02 | 株式会社リコー | Zero cross point detection method for AC commercial voltage in power supply units, power supply systems, and power supply units |
-
1986
- 1986-06-24 JP JP61147557A patent/JPH0695809B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS633624A (en) | 1988-01-08 |
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