JPS58159121A - Constant current circuit - Google Patents
Constant current circuitInfo
- Publication number
- JPS58159121A JPS58159121A JP4227282A JP4227282A JPS58159121A JP S58159121 A JPS58159121 A JP S58159121A JP 4227282 A JP4227282 A JP 4227282A JP 4227282 A JP4227282 A JP 4227282A JP S58159121 A JPS58159121 A JP S58159121A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- relay
- rush current
- current
- resistance
- 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
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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
Abstract
Description
【発明の詳細な説明】
（１） 発明の技術分野
本発明は、定電流回路において、回路？簡素化し、かつ
効率と特性の改善を計った定電流回路に関ｒりものであ
る。[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to a constant current circuit. It concerns a constant current circuit that is simplified and has improved efficiency and characteristics.
（４従来技術及びその問題点 従来の定電流回路ｔｗＪ１図に示す。(4. Prior art and its problems) A conventional constant current circuit is shown in Figure twJ1.
図において王トランスの一次巻線には、起動スイッチ８
Ｎ、ヒュースＦ、突人電流保繰用の抵抗Ｒ１，王トラン
ジスタＴＲ１電源Ｅが直列に接続され、コンデンサＣ８
，抵抗Ｒ１ｅ ０１＊ リレーＲＬが並列に接続さ
れている。In the figure, the primary winding of the transformer has a start switch 8.
N, fuse F, resistor R1 for sudden current retention, main transistor TR1 power supply E are connected in series, and capacitor C8
, resistor R1e 01* and relay RL are connected in parallel.
父、二次巻縁にａ中点にタイオードＤ１＋ Ｄ！＋抵抗
Ｒ，、Ｒ４が直列に、子骨コンデンサＣ５゜Ｃ６が並列
に接続され、コンデンサＣ１とＣ６の接続点に接地され
るとともに、抵抗Ｒｓｋ介して抵抗ＲＩｅ Ｒ４の接続
点に接続される。Father, diode D1+ D at the middle point of a on the secondary winding edge! +resistors R, , R4 are connected in series, and bone capacitors C5 and C6 are connected in parallel, grounded to the connection point of capacitors C1 and C6, and connected to the connection point of resistor RIe and R4 via resistor Rsk.
父、抵抗Ｒ４の電圧は比較ａ００ＭＰＶＣ入力され、基
準電圧Ｖｒｅｆ と比較される。The voltage of the resistor R4 is input to the comparison a00MPVC and compared with the reference voltage Vref.
比較器００ＭＰの出力は制御回路ＰｆＭに人力され、制
御回路ＰＷＭはトランスＴｔｋ介して王トランジスタＴ
Ｒのスイッチング同期ｔ−ＩｖＩｌｍする。The output of the comparator 00MP is input to the control circuit PfM, and the control circuit PWM is connected to the king transistor T via the transformer Ttk.
The switching synchronization of R is t-IvIlm.
ここで動作を説明すると、起動スイッチＪ’Ｎ４ｔオン
にすると電源Ｅから起動スイッチＳＷ、抵抗Ｒ２會介し
て流れコンデンサＯ１に光電される。この時ｆｓ２図（
ａｌの如く突入電流工、が流れるが、この突入電流工、
は王に抵抗Ｒ２の抵抗値によって制限きれる。Here, the operation will be explained. When the starting switch J'N4t is turned on, a photoelectric current flows from the power source E through the starting switch SW and the resistor R2 to the capacitor O1. At this time, fs2 diagram (
An inrush current flows as shown in al, but this inrush current,
can be limited by the resistance value of resistor R2.
ちなみに突入電流Ｉ、ｒ１次式で表わされる。Incidentally, the rush current I and r are expressed by a linear equation.
１
工１＝丁円
ここでＲ［抵抗Ｒ１の抵抗値、ｒｔ’ｚ抵抗Ｒｔ ｋ除
くコンデンサＣ１への光電電流の経路の抵抗、兄、μ電
源呂の出力電圧である。そして、コンデンサＣ，の充電
電圧ｇｃがある電圧になるとリレー１（Ｌが動作し、そ
の接点ｒＱＶｃ↓り抵抗Ｒ１が短絡される。抵抗Ｒ１が
短絡されりと再び突入電流Ｉ、が流れる。1 Engineering 1 = Square circle Here, R[resistance value of resistor R1, rt'z resistor Rt, resistance of photoelectric current path to capacitor C1 excluding k, older brother, output voltage of μ power supply. Then, when the charging voltage gc of the capacitor C reaches a certain voltage, the relay 1 (L) operates, and the resistor R1 is short-circuited through its contact rQVc↓.When the resistor R1 is short-circuited, the rush current I flows again.
この突入型施工、は次式で表わされる。This plunge-type construction is expressed by the following formula.
王、＝３＋ｆ′。King, =3+f'.
上式から明らかな如（Ｅ、とＥ：の差が小さい程突人電
ｔｉｔ ’ ２ ｒｉ小さくなる。そのｔめ、抵抗Ｒ６
とコンデンサＣＩよりなる遅延回路ケ設け、第に図１ｔ
）ｌの如く変化する充電電圧ｇ ｃがＥｌにできるだけ
近づいた点で、ＩＪＬ／−ＲＬが動作する様にしている
。As is clear from the above equation (the smaller the difference between E and E:, the smaller the sudden electric current tit' 2 ri becomes.Then, the resistance R6
A delay circuit consisting of a capacitor CI and a capacitor CI is provided.
)IJL/-RL is made to operate at the point where the charging voltage gc, which changes as 1, approaches El as much as possible.
この九め、コンデンサＣ１として大容量のものケ必要と
し、抵抗Ｒ１も大きな抵抗値を持つ必要があり、この抵
抗Ｒ１により電力が浪費される欠点があった。Ninth, the capacitor C1 needs to have a large capacity, and the resistor R1 also needs to have a large resistance value, which has the drawback of wasting power.
更に２次側において、負荷Ｒ６が＃Ａまって短絡され抵
抗値がＯΩとなった時、２次側で必要な電力が極めて小
さく９ｏｆｔめ王トランジスタＴＨのオン時間は極めて
少さくなる必要がある。Furthermore, on the secondary side, when the load R6 is short-circuited to #A and the resistance value becomes OΩ, the power required on the secondary side is extremely small, and the on-time of the 9oft transistor TH must be extremely short. .
しかし、主トランジスタＴＨの蓄積時間等のため、オン
時間會ある一定時間以下短くすることがこのため、王ト
ランジスタＴＨのオンの同期が長くなり、この周期が可
聴周波数帯に人＾と、発振音が聴えてしまう。However, due to the accumulation time of the main transistor TH, etc., the on-time period must be shortened to a certain period of time or less, so the synchronization of the main transistor TH's on state becomes longer, and this cycle becomes more intense in the audible frequency band, causing oscillation noise. I can hear it.
これ會防止するため、抵抗”４１ Ｒｓ ｋ挿入して
、負荷Ｒ６が短絡されても抵抗値がゼロにならない様に
している。この結果、抵抗Ｈ１，抵抗上（。To prevent this, a resistor of 41 Rs is inserted to prevent the resistance value from becoming zero even if the load R6 is short-circuited.As a result, the resistor H1 and the resistor (.
Ｒ，ＶＣより電力の浪費があり、回路全体の効率が悪く
、又遅延回路を必要とした。It wastes more power than R and VC, has poor overall circuit efficiency, and requires a delay circuit.
（３）発明の目的 本発明は上記欠点に着目し、回路の効率と。(3) Purpose of the invention The present invention focuses on the above drawbacks and improves the efficiency of the circuit.
簡略化が可能な宛電流回路を提供することを目的とする
ものである。It is an object of the present invention to provide a current destination circuit that can be simplified.
（４）発明の構成
一ヒ記目的は１本発明によればトランスの一次巻級ＶＣ
ｌｉ列に接続された起動スイッチと、抵抗と主トランジ
スタ該−次巻線に並列にｆ＆絖されたコンデンサと、二
次巻線に並列に接続された平滑コンデンサと、該平滑コ
ンデンサの電圧と基準電圧と全比較する比較器、＃比較
器出力により王トランジスタのスイッチング周期全制御
する制御回路該飼御回路とアース間紮断続する地気スイ
ッチと金有し、該起動スイッチのオンにより、ｆすれる
電流ケ抵抗ケ介してコンデンサに光電し、該地気スイッ
Ｙのオンにより該制御回路に電源全供給し、該比較器出
力に応じて主トランジスタのスイヅチ／グを行なう様に
し比定′（流回路において、該二次巻線に直列にリレー
１１１１抵抗と並列に該リレーの接点會接続し、二仄巻
線ＶＣ，流れる電ｆｔ、によって該リレー會動作させ該
接点により該抵抗倉短絡する様にし之ことＶ％徴とする
定電流回Ｗ＆によって達成される。(4) Structure of the invention 1) The purpose is 1. According to the present invention, the primary winding class VC of the transformer
A starting switch connected to the li column, a resistor and a main transistor, a capacitor connected in parallel to the secondary winding, a smoothing capacitor connected in parallel to the secondary winding, and the voltage and reference of the smoothing capacitor. A comparator that compares the voltage, a control circuit that completely controls the switching period of the main transistor by the comparator output, and an earth switch that connects and disconnects between the control circuit and the ground, and when the starting switch is turned on, f The current is photoelectrically applied to the capacitor via the resistor, and by turning on the ground switch Y, the control circuit is fully supplied with power, and the main transistor is switched/gated according to the comparator output. In the current circuit, connect the relay 1111 resistor in series with the secondary winding and connect the relay contacts in parallel, operate the relay by the second winding VC and the flowing current ft, and short-circuit the resistor by the contacts. This is achieved by a constant current cycle W& with a V% characteristic.
（５）発明の実施例
第３図に、本発明の実施例を示す図で、図中ＲＬ’はＩ
Ｊ ７−で第１図と同一部材には同一符号ケ付している
。(5) Embodiment of the invention Figure 3 shows an embodiment of the invention, in which RL' is I
In J7-, the same members as in FIG. 1 are given the same reference numerals.
本発明においてに、従来−次側に設けてい友すレー會、
二次側に抵抗Ｒ１の代わりに接続し、第１図における抵
抗Ｒ１，コンデンサＣｓｅ省略した。In the present invention, a friendly competition which is provided next to the conventional one,
It is connected to the secondary side in place of the resistor R1, and the resistor R1 and capacitor Cse in FIG. 1 are omitted.
本発明回路に於いても、起動スイッチＳｆＩ投人時に流
れる突入電ｍｒｉ、従来回路と同じように。In the circuit of the present invention, the inrush current mri that flows when the starting switch SfI is turned on is the same as in the conventional circuit.
抵抗Ｒ，で抑圧できる。ざらにリレＲＩ／の接点ｒ２が
閉じられた時に流れめ突入型ｆｌは従来より抜書される
。それに、起動スイッチＳＷの投入からリレＲＬｒの接
点ｒ２が閉じられるまでの時間框、地気スイツチＡＳｗ
のオンにより、比較器００ＭＰ 。It can be suppressed with resistance R. Conventionally, when the contact r2 of the rough relay RI/ is closed, the flowing plunge type fl is drawn out. In addition, the time frame from when the start switch SW is turned on until the contact r2 of the relay RLr is closed, the earth air switch ASw
By turning on, the comparator becomes 00MP.
制御回ｗ！１．）’＊Ｍから成金定電流回路が起動（地
気信締がきて始めて定電流回路が起動する）しない限り
長くとれる。この結果、コンデンサＣ７に光シされる電
圧がより電圧Ｅ１に近づくここで、′１゜圧、とコンデ
ンサＣ１に印加される電圧ｇ ｃ トの差が小さくなる
ため、リレＲＬ／の接点ｒＱが閉じられ九時に流れる突
入電流に減少すり。Control episode lol! 1. )'*It can take a long time as long as the constant current circuit does not start from M (the constant current circuit starts only when the earth's strength comes). As a result, the voltage applied to the capacitor C7 approaches the voltage E1, and the difference between the '1° pressure and the voltage g c applied to the capacitor C1 becomes smaller, so that the contact rQ of the relay RL/ When closed, the inrush current flowing at nine o'clock is reduced.
まｔ本発明に１回路ケ安定番で動作させる為、従来ヌミ
ー抵抗）’５ｋｌｌ’用してｔかわＱに＋ＪＶＲ１１ケ
接続する。この結果、従来入力側のリレＲ１／で消費し
てた電力會全くなくすことができるので回路全体の効率
ケ上げることができる。In order to operate the present invention with one circuit at a stable number, use the conventional Numie resistor) '5kll' and connect +JVR11 to the line Q. As a result, the power that was conventionally consumed by the relay R1/ on the input side can be completely eliminated, so that the efficiency of the entire circuit can be increased.
以ヒの結果、回路は簡素化され、突入電流時性ａ改善さ
れ、効率も改善されｏｏAs a result, the circuit has been simplified, the inrush current characteristics have been improved, and the efficiency has also been improved.
第１図框、従来の定電流口１１！Ｉで示す図、第２図ば
動作波形紫示す図、第３図ば本発明の実施例ケ示す図で
ある。
醜中１９）電源、ａＬ、ＲＬ’ｌすｖ−、ｒＱ、ｒλ′
にリレー接点、Ｒ１−Ｒ６ぼ抵抗、ＴＲは主トランジス
タ、ａｌｌ−［起動スイッチ、Ａｓｗｉ地気スイｙｆ、
ＣＯＭ ＰＩｒｉ比較器、ＰｗＭｌｄ制御回路であ６゜Figure 1 frame, conventional constant current port 11! FIG. 2 is a diagram showing operating waveforms in purple, and FIG. 3 is a diagram showing an embodiment of the present invention. Ugly medium 19) Power supply, aL, RL'lsuv-, rQ, rλ'
Relay contact, R1-R6 resistance, TR is main transistor, all-[start switch, Aswi earth switch yf,
COM PIri comparator, PwMld control circuit 6°
Claims (1)
と抵抗と主トランジスタ、ｉｌ−次巻線に並列Ｖｃ接ｌ
ｉ＆されｔコンデンサと、二次巻線に直列に接続された
電流検出用抵抗と、該電流検出用抵抗の電圧と基準電圧
とｔ比較する比較器、該比較器力により主トランジスタ
のスイッチング四期紮制御する制御回路、＃制御回路と
アース間を断続する地気スイッチとｔ有し、該起動スイ
、ｌチのオンにより、流れる電流を抵抗會介してコンデ
ンサに充電し、該地気スイッチのオンにより該制御回路
に電＊會供給し、骸比較器出力に応じて主トランジスタ
のスイッチングを行なう様にした定電流回路において、
該二次巻線に直列にリレー會、該抵抗と並列に該リレー
の接点を接続し、二次巻線に流れる電流によって該リレ
ーを動作させ該接点により該抵抗管短絡する様にしたこ
とを特徴とする定電流回路。Connected in series to the primary winding of the transformer is a starting switch, a resistor and a main transistor, IL - Vc connected in parallel to the primary winding.
A current detection resistor connected in series to the secondary winding, a comparator that compares the voltage of the current detection resistor with a reference voltage, and the comparator output controls the switching of the main transistor The control circuit has a ground switch that connects and connects the control circuit and the ground, and when the start switch is turned on, the flowing current charges the capacitor through the resistor, and the ground switch In a constant current circuit that supplies electricity to the control circuit when turned on and switches the main transistor according to the output of the skeleton comparator,
A relay is connected in series with the secondary winding, and the contacts of the relay are connected in parallel with the resistor, so that the current flowing through the secondary winding operates the relay and the contacts short-circuit the resistor tube. Characteristic constant current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4227282A JPS58159121A (en) | 1982-03-17 | 1982-03-17 | Constant current circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4227282A JPS58159121A (en) | 1982-03-17 | 1982-03-17 | Constant current circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58159121A true JPS58159121A (en) | 1983-09-21 |
| JPS6360634B2 JPS6360634B2 (en) | 1988-11-25 |
Family
ID=12631397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4227282A Granted JPS58159121A (en) | 1982-03-17 | 1982-03-17 | Constant current circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58159121A (en) |
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-
1982
- 1982-03-17 JP JP4227282A patent/JPS58159121A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6360634B2 (en) | 1988-11-25 |
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