JPS644432B2 - - Google Patents
Info
- Publication number
- JPS644432B2 JPS644432B2 JP14011881A JP14011881A JPS644432B2 JP S644432 B2 JPS644432 B2 JP S644432B2 JP 14011881 A JP14011881 A JP 14011881A JP 14011881 A JP14011881 A JP 14011881A JP S644432 B2 JPS644432 B2 JP S644432B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- thyristor
- power supply
- capacitor
- supply 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
Links
- 239000003990 capacitor Substances 0.000 claims description 17
- 238000009499 grossing Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Power Conversion In General (AREA)
Description
【発明の詳細な説明】
この発明は交流入力電源から比較的低い直流定
電圧を得る電源回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply circuit that obtains a relatively low constant DC voltage from an AC input power supply.
一般にこの種の直流電源回路は、交流入力電源
をトランス、低抗分圧回路、あるいはコンデンサ
による分圧回路を用いて所定の電圧に降下した
後、整流して平滑することにより所定電圧の直流
出力を得るように構成されるのが普通であつた。
しかしながら、トランスを用いるものは大型化か
つ高重量化し、しかもそのトランスが高コストで
あるという欠点を有していた。また抵抗分圧回路
を用いるものは、その抵抗によるジユール発熱損
失が大きいという欠点がある上に、その発熱処理
が面倒であり、また入力電圧の変動や負荷の変動
に対して出力電圧の安定性が悪いという欠点があ
つた。 In general, this type of DC power supply circuit outputs a DC power at a specified voltage by reducing the AC input power to a specified voltage using a transformer, low resistance voltage divider circuit, or voltage divider circuit using a capacitor, and then rectifying and smoothing it. It was common for the system to be constructed so as to obtain the following.
However, those using a transformer have the drawbacks of being large and heavy, and moreover, the transformer is expensive. In addition, those that use a resistive voltage divider circuit have the disadvantage that the heat loss caused by the resistor is large, the heat generation process is troublesome, and the stability of the output voltage with respect to input voltage fluctuations and load fluctuations is high. The drawback was that it was bad.
例えば、第１図に示す従来回路は分圧コンデン
サ１とダイオード２，３および平滑コンデンサ４
よりなる整流平滑回路を用いた直流電源Ａの例で
あり、負荷Ｂとしてタイマ回路１４とその出力に
よつて制御されるリレー９を接続したものであ
る。同図において、電源回路Ａの出力電圧Vcが
負荷電流すなわちリレーコイル９の電流によつて
変動しないようにトランジスタ６を設け、このコ
レクタ抵抗５とリレーコイル９との抵抗値を等し
くして、リレー制御用トランジスタ１０がオンの
ときトランジスタ６がオフ、オフのときオンする
ようにし、リレー９の開閉による負荷電圧Vcの
変動を防止している。しかしこの回路において
も、交流入力電圧Viの変動や周波数の変動によ
る出力電圧Vcの変動は避けられず、また負荷の
変動に対する出力電圧の安定性が悪いという欠点
があり、特に交流100ボルト／200ボルト共用ある
いは50Hz／60Hz共用機器のような電源多種定格の
ものには到底利用できないものであつた。 For example, the conventional circuit shown in FIG.
This is an example of a DC power supply A using a rectifying and smoothing circuit consisting of a timer circuit 14 and a relay 9 controlled by its output as a load B. In the same figure, a transistor 6 is provided so that the output voltage Vc of the power supply circuit A does not vary depending on the load current, that is, the current of the relay coil 9, and the resistance values of the collector resistor 5 and the relay coil 9 are made equal to each other. The transistor 6 is turned off when the control transistor 10 is on, and turned on when the control transistor 10 is off, thereby preventing fluctuations in the load voltage Vc due to opening and closing of the relay 9. However, even in this circuit, fluctuations in the output voltage Vc due to fluctuations in the AC input voltage Vi and fluctuations in frequency cannot be avoided, and there is also a drawback that the stability of the output voltage with respect to load fluctuations is poor. It was completely impossible to use it for devices with various power supply ratings, such as devices that shared volts or shared 50Hz/60Hz.
この発明は以上のような従来の直流電源回路の
欠点に鑑みてなされたもので、その目的とすると
ころは、小型かつ軽量であつて発熱損失も少く、
出力電圧の安定性にすぐれ、しかも低コストに構
成することができる直流電源回路を提供し、それ
によつて低価格の電圧多種定格の電子機器を実現
するとともに、部品点数の節減によつて在庫管理
面においても利益をもたらそうとするものであ
る。 This invention was made in view of the above-mentioned drawbacks of the conventional DC power supply circuit, and its purpose is to be small and lightweight, with little heat loss.
We provide a DC power supply circuit that has excellent output voltage stability and can be configured at low cost, thereby realizing low-cost electronic devices with various voltage ratings, and also improving inventory management by reducing the number of parts. It is also intended to bring benefits in terms of other aspects.
この発明は上記目的を達成するために、分圧用
インピーダンスとサイリスタと平滑コンデンサを
直列に接続し、サイリスタのゲートを定電圧に保
つことによつて、平滑コンデンサに充電される電
圧がいつもほぼ一定となるようサイリスタのスイ
ツチングが行なわれるようにしたことを特徴とす
る。 In order to achieve the above object, the present invention connects a voltage dividing impedance, a thyristor, and a smoothing capacitor in series, and maintains the gate of the thyristor at a constant voltage so that the voltage charged to the smoothing capacitor is always approximately constant. It is characterized in that the switching of the thyristor is performed so as to
以下この発明の一実施例を図面に基づいて説明
する。第２図は本発明の電源回路をタイマに応用
した一実施例を示す回路図である。 An embodiment of the present invention will be described below based on the drawings. FIG. 2 is a circuit diagram showing an embodiment in which the power supply circuit of the present invention is applied to a timer.
まずタイマの概略の動作について説明する。 First, the general operation of the timer will be explained.
点線で囲まれた直流電源回路Ａによつて得られ
た電圧がタイマ用IC２８に供給されると一定時
間後にICの出力端子２９がＨレベルになり、ト
ランジスタ２４を駆動してリレー２３が動作する
ようになつている。 When the voltage obtained by the DC power supply circuit A surrounded by the dotted line is supplied to the timer IC 28, the output terminal 29 of the IC becomes H level after a certain period of time, driving the transistor 24 and operating the relay 23. It's becoming like that.
さて電源回路Ａにおいて、分圧用インピーダン
スとしてのコンデンサ１５とスイツチング用のサ
イリスタ１７と平滑用コンデンサ２１が直列に接
続されている。またサイリスタ１７のゲートに
は、抵抗２９およびツエナダイオード２０からな
る定電圧部によつて、ツエナ電圧Vzを越えない
電圧が印加されるようになつている。１６はコン
デンサ１５の放電用ダイオード、１８のダイオー
ドはサイリスタ１７のゲートに逆電流が流れない
ようにするためのものである。この構成におい
て、第３図に示すように、まず正極端の電圧が印
加されたとすると、コンデンサ１５、抵抗１９、
ダイオード１８を通してサイリスタ１７のゲート
に電流が流れ、サイリスタ１７が導通する。従つ
て正極性の半サイクル中はサイリスタのアノード
カソード間を通してコンデンサ２１が充電され
る。次に負極性の半サイクル中には、コンデンサ
１５に充電された電荷はダイオード１６を通して
入力電源に還流されて初期状態に戻る。同様にし
て数サイクルの間は、サイリスタ１７が毎回導通
してコンデンサ２１の電圧Vcは充放電を繰り返
しながら上昇する（第３図参照）。ところが、Vc
がツエナ電圧Vzを越えるようになると正極性の
半サイクル中もゲートが逆方向にバイアスされた
ままになり導通しなくなる。次に負荷によつてコ
ンデンサ２１が除々に放電され、VcがVzを下ま
わるようになると、再びサイリスタが導通するよ
うになる。従つて交流電源電圧の変動や負荷の変
動があつても出力電圧VcとしてほぼVzを平均値
とする定電圧が得られるのである。 In the power supply circuit A, a capacitor 15 as a voltage dividing impedance, a switching thyristor 17, and a smoothing capacitor 21 are connected in series. Further, a voltage not exceeding the Zener voltage Vz is applied to the gate of the thyristor 17 by a constant voltage section consisting of a resistor 29 and a Zener diode 20. 16 is a diode for discharging the capacitor 15, and a diode 18 is for preventing reverse current from flowing to the gate of the thyristor 17. In this configuration, as shown in FIG.
A current flows through the diode 18 to the gate of the thyristor 17, and the thyristor 17 becomes conductive. Therefore, during the positive half cycle, capacitor 21 is charged across the anode and cathode of the thyristor. Next, during the negative half cycle, the charge charged in the capacitor 15 is returned to the input power source through the diode 16, and returns to the initial state. Similarly, for several cycles, the thyristor 17 becomes conductive each time, and the voltage Vc of the capacitor 21 increases while repeating charging and discharging (see FIG. 3). However, Vc
When the voltage exceeds the Zener voltage Vz, the gate remains biased in the reverse direction even during the positive half cycle and ceases to conduct. Next, the capacitor 21 is gradually discharged by the load, and when Vc falls below Vz, the thyristor becomes conductive again. Therefore, even if there are fluctuations in the AC power supply voltage or load, a constant voltage with an average value of approximately Vz can be obtained as the output voltage Vc.
第３図において、t0からt1までの期間は、サイ
リスタ１７が各正サイクル毎に導通するのでコン
デンサ２１の電圧Vcは急激に上昇するが、t1時
点では入力電圧Viが正に反転してもVcの方がツ
エナ電圧Vzより大きいのでサイリスタ１７は導
通せず、t2時点でVcがVzまで下がるとはじめて
サイリスタ１７が導通する。しかしこの場合は導
通時間が短いので、Vcの上昇も小さい。次にt3
時点においては、この正サイクル期間中にVcが
Vzまで達しなかつたのでサイリスタ１７の導通
も１回休止の状態となり、次の正サイクルすなわ
ちt4時点でVcがVzより小さくなると再びサイリ
スタ１７が導通してVcを上昇させる。こうして
負荷電流があまり大きくなければ、サイリスタ１
７の休止期間が長くなり、負荷電流が増加すると
サイリスタの導通期間が長くなつて、Vcをほぼ
一定に維持するように作用するのである。 In FIG. 3, during the period from t 0 to t 1 , the voltage Vc of the capacitor 21 rises rapidly because the thyristor 17 conducts in each positive cycle, but at the time t 1 , the input voltage Vi reverses to positive. However, since Vc is larger than the zener voltage Vz, the thyristor 17 does not conduct, and the thyristor 17 becomes conductive only when Vc drops to Vz at time t2 . However, in this case, since the conduction time is short, the rise in Vc is also small. then t 3
At this point, during this positive cycle period, Vc is
Since Vz has not been reached, the conduction of the thyristor 17 is also suspended once, and when Vc becomes smaller than Vz in the next positive cycle, that is, at time t4 , the thyristor 17 becomes conductive again to raise Vc. In this way, if the load current is not too large, the thyristor 1
When the rest period of 7 becomes longer and the load current increases, the conduction period of the thyristor becomes longer and acts to maintain Vc approximately constant.
第４図および第５図は本発明の他の実施例を示
したもので、分圧用インピーダンスとしてそれぞ
れ抵抗１５′および全波整流のコンデンサ１５″を
用いている。その他第２図の実施例と対応する部
分には同じ符号をつけてある。 4 and 5 show other embodiments of the present invention, in which a resistor 15' and a full-wave rectifier capacitor 15'' are used as voltage dividing impedances, respectively. Corresponding parts are given the same symbols.
以上のようにこの発明による電源回路は、小型
かつ軽量に構成することができ、また発熱損失も
少なく、さらに出力電圧の安定性にすぐれ、しか
も低コストに構成することもできるので、この電
源回路を用いることによつて低コストの電圧多種
定格の電子機器を実現できるという利点がある。 As described above, the power supply circuit according to the present invention can be configured to be small and lightweight, has little heat loss, has excellent output voltage stability, and can be configured at low cost. The advantage of using this is that it is possible to realize low-cost electronic equipment with various voltage ratings.
第１図は従来の直流電源回路を用いたタイマ回
路図、第２図は本発明の直流電源回路を用いたタ
イマ回路図、第３図は第２図における平滑コンデ
ンサの電圧Vcの変化を示す図、第４図および第
５図は本発明の他の実施例を示す回路図である。
１５……分圧用コンデンサ、１６……ダイオー
ド、１７……サイリスタ、１８……ダイオード、
１９……抵抗、２０……ツエナダイオード、２１
……平滑コンデンサ、２２……ダイオード、２３
……タイマ出力リレー、２４……トランジスタ、
２５……抵抗、２６……コンデンサ、２７……ツ
エナダイオード、２８……タイマ用IC、２９…
…タイマ用ICの出力端子。
Figure 1 is a timer circuit diagram using a conventional DC power supply circuit, Figure 2 is a timer circuit diagram using the DC power supply circuit of the present invention, and Figure 3 shows changes in the voltage Vc of the smoothing capacitor in Figure 2. 4 and 5 are circuit diagrams showing other embodiments of the present invention. 15... Voltage dividing capacitor, 16... Diode, 17... Thyristor, 18... Diode,
19...Resistor, 20...Zena diode, 21
... Smoothing capacitor, 22 ... Diode, 23
...Timer output relay, 24...Transistor,
25...Resistor, 26...Capacitor, 27...Zena diode, 28...Timer IC, 29...
...Output terminal of timer IC.
Claims (1)
回路において、交流入力電源と負荷との間に、分
圧用インピーダンスを通してサイリスタを直列に
介在させるとともに、このサイリスタの負荷側に
平滑コンデンサを並列接続し、サイリスタのゲー
トに定電圧を印加しておくことによつて、負荷側
の出力電圧を一定に保つように構成した直流電源
回路。1. In a power supply circuit that receives an AC voltage as an input and obtains a constant DC voltage, a thyristor is interposed in series between the AC input power source and the load through a voltage dividing impedance, and a smoothing capacitor is connected in parallel to the load side of the thyristor. A DC power supply circuit configured to keep the output voltage on the load side constant by applying a constant voltage to the gate of the thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14011881A JPS5843182A (en) | 1981-09-04 | 1981-09-04 | Dc power source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14011881A JPS5843182A (en) | 1981-09-04 | 1981-09-04 | Dc power source circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5843182A JPS5843182A (en) | 1983-03-12 |
| JPS644432B2 true JPS644432B2 (en) | 1989-01-25 |
Family
ID=15261324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14011881A Granted JPS5843182A (en) | 1981-09-04 | 1981-09-04 | Dc power source circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5843182A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030473A (en) * | 1983-07-29 | 1985-02-16 | Nippon Denso Co Ltd | Contactless ignitor for internal-combustion engine |
| JP4543718B2 (en) * | 2003-11-27 | 2010-09-15 | ダイキン工業株式会社 | Power converter |
| CN103580515A (en) * | 2013-11-15 | 2014-02-12 | 深圳市航盛电子股份有限公司 | Circuit for reducing power source static power consumption |
| US20180297383A1 (en) * | 2015-07-15 | 2018-10-18 | Hewlett-Packard Development Company, L.P. | Powering a power monitor |
-
1981
- 1981-09-04 JP JP14011881A patent/JPS5843182A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5843182A (en) | 1983-03-12 |
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