JPH0576041B2 - - Google Patents
Info
- Publication number
- JPH0576041B2 JPH0576041B2 JP59008577A JP857784A JPH0576041B2 JP H0576041 B2 JPH0576041 B2 JP H0576041B2 JP 59008577 A JP59008577 A JP 59008577A JP 857784 A JP857784 A JP 857784A JP H0576041 B2 JPH0576041 B2 JP H0576041B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- magnetically controlled
- saturable reactor
- switch element
- transformer
- 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 - Fee Related
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is AC
- G05F1/32—Regulating voltage or current wherein the variable actually regulated by the final control device is AC using magnetic devices having a controllable degree of saturation as final control devices
- G05F1/34—Regulating voltage or current wherein the variable actually regulated by the final control device is AC using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices
- G05F1/38—Regulating voltage or current wherein the variable actually regulated by the final control device is AC using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only
-
- 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
- H02M3/33538—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 of the forward type
- H02M3/33546—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 of the forward type with automatic control of the output voltage or current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Control Of Electrical Variables (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、磁気制御形スイツチングレギユレー
タに係り、特にスイツチングレギユレータの主変
圧器及び磁気制御用可飽和リアクトルのリセツト
を確実に行なえる回路構成を有する磁気制御形ス
イツチングレギユレータに関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a magnetically controlled switching regulator, and particularly to a method for reliably resetting the main transformer and magnetically controlled saturable reactor of the switching regulator. The present invention relates to a magnetically controlled switching regulator having a circuit configuration that allows switching.
第１図に従来の磁気制御形スイツチングレギユ
レータの一回路例を示す。
FIG. 1 shows an example of a circuit of a conventional magnetically controlled switching regulator.
図中Ｅは非安定な直流電源、Ｔは主変圧器、Ｑ
はスイツチ素子、C1は自励発振回路でスイツチ
素子Ｑを所定の周波数で動作させるものである。 In the diagram, E is an unstable DC power supply, T is the main transformer, and Q
is a switch element, and C1 is a self-excited oscillation circuit that operates the switch element Q at a predetermined frequency.
またMLは可飽和リアクトル、D1，D2はダイオ
ード、LFは平滑用のチヨークコイル、CFは同じ
くコンデンサである。 Further, M L is a saturable reactor, D 1 and D 2 are diodes, L F is a smoothing coil, and C F is also a capacitor.
磁気制御形スイツチングレギユレータは、種々
の回路構成があり、その動作も周知のことである
が第１図の回路で簡単に説明する。スイツチ素子
Ｑがターンオンすると主変圧器Ｔの一次巻線n1に
電圧V1が誘起し、同様に二次巻線n2にも図示黒
丸を正極性とする電圧V2が誘起する。この時、
予かじめリセツト電流irにより可飽和リアクトル
MLはリセツトされているから、可飽和リアクト
ルMLは図示の極性に電圧をもち電圧V2を阻止す
る。すなわち、可飽和リアクトルMLは高いイン
ピーダンスをもちスイツチオフの状態を呈する。
スイツチ素子Ｑがターンオンして時間が経過し、
電圧V2で可飽和リアクトルMLが飽和領域まで磁
化されるとスイツチオンの状態となり、はじめて
負荷に電力を供給するようになる。この供給経路
は巻線n2の正極側から可飽和リアクトルML、ダ
イオードD1、チヨークコイルLF、コンデンサCF
から巻線n2の負極側に至る。スイツチ素子Ｑのタ
ーンオフ期間に出力電圧V0を一定に安定化させ
るため、V0の検出信号vsを制御回路C2に入力し、
リセツト電流irを制御している。 Magnetically controlled switching regulators have various circuit configurations, and their operations are well known, but will be briefly explained using the circuit shown in FIG. When the switch element Q is turned on, a voltage V 1 is induced in the primary winding n 1 of the main transformer T, and a voltage V 2 with positive polarity indicated by a black circle is similarly induced in the secondary winding n 2 . At this time,
Saturable reactor by pre-reset current i r
Since M L has been reset, the saturable reactor M L has a voltage of the polarity shown and blocks voltage V 2 . That is, the saturable reactor M L has high impedance and exhibits a switch-off state.
Switch element Q turns on and time passes,
When the saturable reactor M L is magnetized to the saturation region by the voltage V 2 , it enters a switch-on state and begins to supply power to the load for the first time. This supply path starts from the positive side of winding n 2 to saturable reactor M L , diode D 1 , choke coil L F , and capacitor C F
to the negative pole side of winding n2 . In order to stabilize the output voltage V 0 at a constant level during the turn-off period of the switch element Q, the detection signal V s of V 0 is input to the control circuit C 2 ,
Controls the reset current ir .
制御回路C2の電力は、別に設けた補助電源Ea
か、あるいは出力電圧V0を電力源とすることが
できる。 The power for the control circuit C 2 is supplied from a separately provided auxiliary power supply E a
Alternatively, the output voltage V 0 can be used as a power source.
これら従来の磁気制御形スイツチングレギユレ
ータでは、次の様な欠点を有している。 These conventional magnetically controlled switching regulators have the following drawbacks.
一つは、主変圧器の偏磁があげられる。すなわ
ち、主スイツチ素子Ｑのターンオフ期間にリセツ
ト電流irは、制御用素子QRを介して図示破線のよ
うに主変圧器二次巻線n2に流れる。主変圧器はこ
の電流で磁化された状態でＱがターンオンするた
め、通常のスイツチングレギユレータに比べて高
い磁束密度まで主変圧器が磁化され、主変圧器の
損失及び温度上昇が増大する。またスイツチング
レギユレータの負荷が急変した場合、出力電圧変
動を補償するため、irが大きくなると主変圧器の
磁化される割合も大きくなり主変圧器が磁気飽和
を起こしてスイツチングレギユレータを破壊させ
る場合もある。 One of them is biased magnetism in the main transformer. That is, during the turn-off period of the main switch element Q, the reset current i r flows through the control element Q R to the main transformer secondary winding n 2 as shown by the broken line. Q turns on while the main transformer is magnetized by this current, so the main transformer is magnetized to a higher magnetic flux density than a normal switching regulator, increasing losses and temperature rise in the main transformer. . In addition, when the load on the switching regulator suddenly changes, in order to compensate for output voltage fluctuations, as i r increases, the proportion of the main transformer that is magnetized also increases, causing magnetic saturation in the main transformer and causing the switching regulator to In some cases, the controller may be destroyed.
二つには、可飽和リアクトルMLのリセツトが
十分にできない問題がある。汎用品では、無負荷
から最大出力まで電圧安定化が要求されるが、磁
気制御形スイツチングレギユレータで軽負荷時の
出力を補償するには、スイツチ素子Ｑのターンオ
ン期間の殆んどの時間にわたつて巻線の出力電圧
v2を飽和リアクトルで阻止しなければならない。 The second problem is that the saturable reactor M L cannot be reset sufficiently. General-purpose products require voltage stabilization from no load to maximum output, but in order to compensate for the output at light loads with magnetically controlled switching regulators, most of the turn-on period of switch element Q must be stabilized. The output voltage of the winding over
v 2 must be blocked by a saturation reactor.
この時可飽和リアクトルMLはv2−V0の電圧で
磁化されるからこれをリセツトするには、ほぼ同
様の電圧でこれを磁化しないと、電圧時間積の関
係からスイツチ素子Ｑのターンオフ期間に可飽和
リアクトルMLのリセツトが完了しない。 At this time, the saturable reactor M L is magnetized with a voltage of v 2 - V 0 , so in order to reset it, it must be magnetized with almost the same voltage, otherwise the turn-off period of the switch element Q will be The reset of saturable reactor M L is not completed.
すなわち、チヨークインプツト型の出力平滑回
路では、v2はV0の数倍に設計される。例えば、
5V出力ではv2は約20V、12V出力では約60Vにな
つている。またスイツチ素子Ｑのスイツチング期
間で、オンデユテイは一般に30％程度になつてい
る。このため、可飽和リアクトルMLをリセツト
する電圧源として出力V0または同程度の補助電
源Esを用いる方法は、電圧が低すぎる分だけリセ
ツト時間が長くなり、軽負荷時の出力安定性に欠
ける場合がある。 That is, in the output smoothing circuit of the input type, v 2 is designed to be several times V 0 . for example,
For 5V output, v2 is approximately 20V, and for 12V output, it is approximately 60V. Furthermore, during the switching period of the switch element Q, the on-duty is generally about 30%. For this reason, the method of using the output V 0 or the equivalent auxiliary power supply E s as a voltage source to reset the saturable reactor M L requires a long reset time due to the low voltage, which may affect the output stability at light loads. It may be missing.
これらの問題に対し、従来は主変圧器の鉄心体
積を大きくして温度上昇を抑制するとゝもに、制
御回路C2の過渡応答特性を低下させて、負荷急
変（軽減時）でリセツト電流irが大きくなること
を防止していた。また可飽和リアクトルMLのリ
セツトには主変圧器のフライバツク電圧が荷担す
るが、これはスイツチ素子Ｑのターンオフ期間の
途中で殆んど消滅するため依存できない。 To solve these problems, conventional methods have suppressed temperature rise by increasing the core volume of the main transformer, and at the same time have lowered the transient response characteristics of the control circuit C2 to reduce the reset current i when the load suddenly changes (at the time of reduction). This prevented r from increasing. Further, the flyback voltage of the main transformer is responsible for resetting the saturable reactor M L , but this cannot be relied upon because it almost disappears during the turn-off period of the switch element Q.
これからの結果、スイツチングレギユレータの
小型化が阻害されるとゝもに、出力の制御精度が
低下する問題を有していた。 As a result, the miniaturization of the switching regulator has been hindered, and the output control accuracy has been reduced.
無負荷から最大出力まで高い精度の出力制御が
安定に得られる磁気制御形スイツチングレギユレ
ータを提供することにある。
An object of the present invention is to provide a magnetically controlled switching regulator that can stably achieve highly accurate output control from no-load to maximum output.
本発明は、前記磁気制御用リアクトルを、前記
変圧器二次巻線の電流を流す第１の巻線と、これ
と磁気結合する第２の巻線とからなる可飽和リア
クトルで構成し、前記第２の巻線には、前記第１
の巻線に電流が流れたときと逆極性に前記可飽和
リアクトルを磁化するためのリセツト電流を、前
記主スイツチ素子のオフ期間に流す回路と、出力
電圧を制御すべく前記リセツト電流の大きさを制
御する回路とを備えることに特徴がある。これに
より、特に無負荷状態の時、電力供給を十分阻止
できるようにリセツトできることゝ、主変圧器に
このリセツト電流を流さない構成にして制御系の
過渡応答感度を向上させ、出力制御範囲の制御精
度が高く得られるようにした。
In the present invention, the magnetic control reactor is configured with a saturable reactor including a first winding through which a current of the transformer secondary winding flows and a second winding magnetically coupled to the first winding, The second winding includes the first
A circuit for passing a reset current during the off period of the main switch element to magnetize the saturable reactor with a polarity opposite to that when the current flows through the winding of the main switch element, and a circuit for controlling the magnitude of the reset current to control the output voltage. It is characterized in that it is equipped with a circuit for controlling. As a result, it is possible to reset the power supply sufficiently to prevent the power supply, especially when there is no load.The configuration does not allow this reset current to flow through the main transformer, improving the transient response sensitivity of the control system, and controlling the output control range. Achieved high accuracy.
第２図に本発明の一実施例を示す。主変圧器Ｔ
の一次側は、従来例を示した第１図と同じである
ため割愛してある。第２図において可飽和リアク
トルMLは、第１の巻線nM1と第２の巻線nM2とが
磁気結合するように設けてある。第１の巻線nM1
の一端は主変圧器Ｔの二次巻線n2の両端子のう
ち、スイツチ素子Ｑのオン期間に負極性の電圧を
誘起する側、他の一端は出力端の負極Ｇに接続さ
れる。一方の第２の巻線nM2は一端が出力の負極
Ｇに、他の一端は制御用スイツチ素子QRを介し
て出力端の正極側に接続され、図示破線の経路で
リセツト電流irを流すように構成される。
FIG. 2 shows an embodiment of the present invention. Main transformer T
The primary side is omitted because it is the same as in FIG. 1 showing the conventional example. In FIG. 2, the saturable reactor M L is provided such that a first winding n M1 and a second winding n M2 are magnetically coupled. First winding n M1
One end of the secondary winding n2 of the main transformer T is connected to the side that induces a voltage of negative polarity during the ON period of the switch element Q, and the other end is connected to the negative pole G of the output terminal. One end of the second winding N M2 is connected to the negative output terminal G, and the other end is connected to the positive terminal side of the output terminal via the control switch element Q R , and the reset current I R is connected through the path shown by the broken line in the figure. Configured to flow.
この時、可飽和リアクトルMLは、
V0×nM1の巻数／nM2の巻数の電圧でリセツト方向に磁化
さ
れるからこの値がv2−V0とほゞ等しくなるよう
に巻数比を選定することにより、スイツチ素子Ｑ
の最大オンデユテイ動作（通常50％）時でもター
ンオフ期間内に可飽和リアクトルMLのリセツト
を完了できる。 At this time, the saturable reactor M L is magnetized in the reset direction with a voltage of V 0 ×n M1 turns/n M2 turns, so the turns ratio is set so that this value becomes approximately equal to v 2 - V 0 . By selecting the switch element Q
Even at maximum on-duty operation (usually 50%), the reset of the saturable reactor M L can be completed within the turn-off period.
このリセツト用に設ける第２の巻線nM2は数十
〜数百mAのirを流すものであるため細い線経で
良く、巻回数も第１の巻線nM1の1/2〜1/5程度に
選定できる。 The second winding nM2 provided for this reset is one that passes an i r of several tens to hundreds of mA, so it can be a thin wire, and the number of turns is 1/2 to 1 of that of the first winding nM1 . /5 can be selected.
制御回路C2は詳細な説明を省略するが、出力
電圧を検出して信号vsを誤差アンプに入力し、基
準電圧と比較をとつて制御用素子QRを制御する
もので一般的な手法でよい。 The detailed explanation of the control circuit C2 will be omitted, but it is a common method that detects the output voltage, inputs the signal Vs to the error amplifier, compares it with the reference voltage, and controls the control element QR . That's fine.
本発明では、可飽和リアクトルMLに別巻線を
設うける簡易な構成で、可飽和リアクトルMLを
リセツトできるとゝもに、主変圧器Ｔを確実にリ
セツトできるため、通常のスイツチングレギユレ
ータと同じ体積の変圧器を用いることができる。
また制御回路C2の過渡応答特性を低下させる必
要がないため、電源の要求仕様に応じて制御精度
の向上が得られる。 In the present invention, the saturable reactor M L can be reset with a simple configuration in which a separate winding is provided in the saturable reactor M L , and the main transformer T can be reliably reset, so that it is possible to reset the main transformer T reliably. A transformer with the same volume as the transformer can be used.
Furthermore, since there is no need to reduce the transient response characteristics of the control circuit C2 , control accuracy can be improved in accordance with the required specifications of the power supply.
第３図は本発明による磁気気制御形スイツチン
グレギユレータの出力特性を従来例と比較したも
のである。従来例に比べて、出力電圧の制御特性
が大幅に改善されていることがわかる。 FIG. 3 compares the output characteristics of the magnetically controlled switching regulator according to the present invention with that of a conventional example. It can be seen that the control characteristics of the output voltage are significantly improved compared to the conventional example.
また本実施例は単一出力のもので示したが、複
数の出力でも各々個々に制御が可能であるほか、
他の出力がPWM制御方式をとる。いわゆるクロ
スレギユレーシヨンを利用したスイツチングレギ
ユレータにも応用できる。 In addition, although this embodiment has been shown with a single output, it is also possible to control each of multiple outputs individually.
Other outputs use PWM control. It can also be applied to a switching regulator using so-called cross regulation.
本発明によれば、主スイツチ素子がオフ時にお
いて、可飽和リアクトルに設けた別巻線にリセツ
ト電流を流す構成により、リアクトルを逆バイア
ス（リセツト方向）に磁化しているので、無負荷
から最大出力まで高い精度の出力制御が得られる
効果がある。
According to the present invention, when the main switch element is off, the reactor is magnetized in reverse bias (in the reset direction) by flowing a reset current through a separate winding provided in the saturable reactor, so that the maximum output can be achieved from no load. This has the effect of providing highly accurate output control.
また、可飽和リアクトルのリセツトを別巻線で
行なえるため主回路を構成する要素の耐圧に関係
無く十分高い電圧で行なえるため出力電圧制御が
安定に行なえるという効果がある。 Further, since the saturable reactor can be reset using a separate winding, it can be reset at a sufficiently high voltage regardless of the withstand voltage of the elements constituting the main circuit, so that the output voltage can be controlled stably.
第１図は従来例の回路図、第２図は本発明の実
施例を示す回路図、第３図は出力特性の比較を示
すグラフである。
Ｑ……主スイツチ素子、ML……磁気制御用可
飽和リアクトル、Ｔ……主変圧器。
FIG. 1 is a circuit diagram of a conventional example, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is a graph showing a comparison of output characteristics. Q...Main switch element, M L ...Saturable reactor for magnetic control, T...Main transformer.
Claims (1)
スイツチ素子とを直列接続し、前記変圧器の二次
巻線の両端子間に少なくとも磁気制御用リアクト
ルと整流ダイオードとチヨークコイルとコンデン
サを直列接続し、該チヨークコイルに蓄積される
エネルギーを転流ダイオードにより前記コンデン
サに転送する回路を備え、前記主スイツチ素子の
オン、オフ動作によつて前記変圧器の二次巻線に
出力される電力を、前記磁気制御用リアクトルに
よつて前記コンデンサに出力制御する磁気制御形
スイツチングレギユレータにおいて、 前記磁気制御用リアクトルは、前記変圧器二次
巻線の電流を流す第１の巻線と、これと磁気結合
する第２の巻線とからなる可飽和リアクトルで構
成し、 前記第２の巻線には、前記第１の巻線に電流が
流れた時と逆極性に前記可飽和リアクトルを磁化
するためのリセツト電流を、前記主スイツチ素子
のオフ期間に流す回路と、 前記出力電圧を制御すべく前記リセツト電流の
大きさを制御する回路 とを備えること特徴とする磁気制御形スイツチン
グレギユレータ。 ２ 特許請求の範囲第１項において、 前記可飽和リアクトル第２の巻線に流すところ
のリセツト電流は、前記可飽和リアクトル外の端
子から供給されることを特徴とする磁気制御形ス
イツチングレギユレータ。 ３ 特許請求の範囲第２項において、 前記リセツト電流は、前記コンデンサに蓄えら
れた電力から供給されることを特徴とする磁気制
御形スイツチングレギユレータ。[Claims] 1. A primary winding of a transformer and a main switch element are connected in series between both terminals of a DC power source, and at least a magnetic control reactor and a rectifier are connected between both terminals of a secondary winding of the transformer. A circuit is provided in which a diode, a chiyoke coil, and a capacitor are connected in series, and the energy accumulated in the chiyoke coil is transferred to the capacitor by a commutating diode, and the secondary winding of the transformer is activated by the on/off operation of the main switch element. In a magnetically controlled switching regulator that controls the output of power output to a line to the capacitor by the magnetically controlled reactor, the magnetically controlled reactor allows current to flow in the secondary winding of the transformer. It is composed of a saturable reactor consisting of a first winding and a second winding that is magnetically coupled to the first winding, and the second winding has a current flowing in the opposite direction to that when the current flows through the first winding. The present invention is characterized by comprising a circuit for flowing a reset current for polarizing the saturable reactor during an off period of the main switch element, and a circuit for controlling the magnitude of the reset current to control the output voltage. A magnetically controlled switching regulator. 2. The magnetically controlled switching leg according to claim 1, wherein the reset current flowing through the second winding of the saturable reactor is supplied from a terminal outside the saturable reactor. Rator. 3. The magnetically controlled switching regulator according to claim 2, wherein the reset current is supplied from electric power stored in the capacitor.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008577A JPS60153519A (en) | 1984-01-23 | 1984-01-23 | Magnetically controlled switching regulator |
| DE8585100629T DE3564894D1 (en) | 1984-01-23 | 1985-01-22 | Switch mode power supply having magnetically controlled output |
| EP85100629A EP0150797B1 (en) | 1984-01-23 | 1985-01-22 | Switch mode power supply having magnetically controlled output |
| US06/694,060 US4626976A (en) | 1984-01-23 | 1985-01-23 | Switch mode power supply having magnetically controlled output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008577A JPS60153519A (en) | 1984-01-23 | 1984-01-23 | Magnetically controlled switching regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60153519A JPS60153519A (en) | 1985-08-13 |
| JPH0576041B2 true JPH0576041B2 (en) | 1993-10-21 |
Family
ID=11696877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59008577A Granted JPS60153519A (en) | 1984-01-23 | 1984-01-23 | Magnetically controlled switching regulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60153519A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01190140A (en) * | 1988-01-26 | 1989-07-31 | Matsushita Electric Works Ltd | Optical wireless receiver |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57111713A (en) * | 1980-12-29 | 1982-07-12 | Fujitsu Ltd | Direct current power source device |
| EP0123098A3 (en) * | 1983-03-28 | 1986-01-29 | Intronics, Inc. | Switching power supply regulation |
| JPS60114587U (en) * | 1983-12-30 | 1985-08-02 | 株式会社日立製作所 | switching regulator |
-
1984
- 1984-01-23 JP JP59008577A patent/JPS60153519A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60153519A (en) | 1985-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3935526A (en) | DC-to-DC converter | |
| US4626976A (en) | Switch mode power supply having magnetically controlled output | |
| US5363323A (en) | Power supply with plural outputs supplying dynamic and steady loads | |
| JPH0576041B2 (en) | ||
| JPH08126313A (en) | Switching power supply | |
| JPS6219104Y2 (en) | ||
| JPH0574309B2 (en) | ||
| JP2502967B2 (en) | Switching regulator | |
| JPS644307Y2 (en) | ||
| JPH0261232B2 (en) | ||
| JPH0238420Y2 (en) | ||
| JPS58148680A (en) | self-excited oscillation circuit | |
| JP2563363B2 (en) | Flyback transformer equipment | |
| JPH0644311Y2 (en) | Rectifier circuit including saturable reactor | |
| JPH0635661Y2 (en) | Switching regulator | |
| JPS602071A (en) | Magnetic control type switching regulator | |
| JPS5918865Y2 (en) | Self-excited DC-DC converter | |
| JP3375188B2 (en) | Switching regulator overcurrent protection circuit | |
| JPS60153520A (en) | Magnetic control type switching regulator | |
| JPS6253176A (en) | Overcurrent drooping system of multi-output power supply | |
| JPS61199467A (en) | Switching regulator | |
| JPS61115109A (en) | Two-mode power source device | |
| JPS6387167A (en) | Forward type DC-DC converter | |
| JPH0377287U (en) | ||
| JPH0251358A (en) | Switching regulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |