JPS59178967A - Power converter - Google Patents
Power converterInfo
- Publication number
- JPS59178967A JPS59178967A JP58051579A JP5157983A JPS59178967A JP S59178967 A JPS59178967 A JP S59178967A JP 58051579 A JP58051579 A JP 58051579A JP 5157983 A JP5157983 A JP 5157983A JP S59178967 A JPS59178967 A JP S59178967A
- Authority
- JP
- Japan
- Prior art keywords
- power
- power supply
- transformer
- voltage
- switch 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.)
- 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
Abstract
Description
【発明の詳細な説明】 い電力変換装置に関するものである。[Detailed description of the invention] This invention relates to a new power conversion device.
従来よシ負荷に直流電力を供給する′亀力変換装置の信
頼性を高めるため、複数の直流電源を入力として用いる
ことにより無停電特性、即ち入力直流電源のいずれかが
停電となっても負荷に電力を供給し吹けるようにしたも
のが知られている。In order to improve the reliability of conventional power converters that supply DC power to loads, multiple DC power sources are used as inputs to provide uninterruptible characteristics, that is, even if one of the input DC power sources is out of power, the load will not be interrupted. There are known devices that supply electricity to the instrument so that it can be played.
このような電力変換装置として、発明者らが既に出願績
（％願昭５ ７ − ２ １． ８ ９ ２ ）の１′
＆１１易な装置があるが、以下、これをｇＪ図について
説明する。図中， １ ０ − ］、 、 Ｊ． Ｏ
−２・・・・・・」Ｏ−ｎは複数個の直流電源、２０は
トランス、３０はスイッチング素子、例えばスイッチン
グトランジスタ、４０は制御・駆動回路、５０−Ｊ．。The inventors have already filed 1' of applications for such a power conversion device (1985-1989).
&11 There is a simple device, which will be explained below using the gJ diagram. In the figure, 10-], , J. O
-2...'' O-n is a plurality of DC power supplies, 20 is a transformer, 30 is a switching element, for example a switching transistor, 40 is a control/drive circuit, 50-J. .
５０−２・・・５０−ｎは接続用ダイオード、６］およ
び６２は整流用ダイオード、６３は平滑用コイル、６４
は平滑用コンデンサ、７は負荷である。上記トランス２
０は中間タップｉ” Ｊ 。50-2...50-n are connecting diodes, 6] and 62 are rectifying diodes, 63 is a smoothing coil, 64
is a smoothing capacitor, and 7 is a load. Above transformer 2
0 is the intermediate tap i”J.
Ｔ２・・・Ｔ（ｎ Ｊ）を有する一次善線２０Ｊと二
次巻線２０２とを備えている。上記構成により直流電源
Ｊ． Ｏ − Ｊ． 、 Ｊ． Ｏ−２・・」０−ｎの
直流′成力はスイッチングトランジスタ３０の断続１１
Ｕ Ｊ：つてトランス２０の一次側から二矢倶１に伝達
さノＬＸ整流用ダイオ−Ｐ６」および６２により電流さ
れた後、平滑用コイル６３および平滑用コンデンサ６４
からなるフィルタを通して所望の′電圧値の直流電力に
変換でれ、県何７に供給される。It includes a primary wire 20J having T2...T(n J) and a secondary winding 202. With the above configuration, the DC power supply J. O-J. , J. O-2...''0-n direct current output is the switching transistor 30's intermittent 11
UJ: After the current is transmitted from the primary side of the transformer 20 to the two arrows 1 through the LX rectifier diode P6 and 62, the current is passed through the smoothing coil 63 and the smoothing capacitor 64.
It is converted into DC power of a desired voltage value through a filter consisting of a filter, and then supplied to the prefecture.
ところで上記装置において、トランス２０の一次巻線２
０」の各直流電源］、 Ｏ−１、１０−２・・］Ｑｎに
対する巻数を調整し接続用ダイオード５０−１．５０−
２・・・５０−ｎの逆方向電流阻止特性を利用すること
によって、常時は複数の直流電源ＪＯ］、１０ ２−１
Ｏｎのうちの任意の一つのみから電力を供給させ、該一
つの直流′電源が障害と々つだ場合に他の直流電源から
電力を供給するようになすことができる。例えば開用電
源を」に流して得た電比Ｖ（、の直流電源を直流電源Ｊ
Ｏ−］とし、電圧ＶＩ３の電池を直流電源］０−２とし
、その他の直流電源全なしとし、またトランス２０の一
次巻線２（１１の直流電源３０−１に対する巻数をｎ。By the way, in the above device, the primary winding 2 of the transformer 20
0'' DC power supply], O-1, 10-2...] Adjust the number of turns for Qn and connect the connecting diode 50-1.50-
By utilizing the reverse current blocking characteristics of 2...50-n, multiple DC power supplies JO], 10 2-1
It is possible to supply power from only one of the DC power supplies, and to supply power from another DC power supply when the one DC power supply fails. For example, the DC power supply with electric power ratio V(, obtained by passing the open power supply through the DC power supply J
O-], a battery with a voltage VI3 is used as a DC power source]0-2, there are no other DC power sources, and the number of turns for the primary winding 2 of the transformer 20 (11) for the DC power source 30-1 is n.
、直流電源」０−２に対する巻数ヲｎＢとすると、これ
らの関係をと選ぶことによシ、電池（直流電豚］ｏ−２
）入力側の接続用ダイオ−ｒｓｏ−２のカッ−１δの′
酸比ｔアノーｒの′電圧、Ｒ１」ちｔ池延圧よりも１戊
く設定でき、商用電源（直流電源ＪＯ−Ｊ）の電［ＩＥ
Ｖｑが入ノゴれている時に電池の電力が消費されるのを
防ぐことかできる。, the number of turns for a DC power source 0-2 is nB, then by choosing these relationships, the battery (DC power supply) o-2
)' of the input side connection diode RSO-2
The voltage of the acid ratio anode R1 can be set to 1 higher than the rolling pressure, and the voltage of the commercial power supply (DC power supply JO-J) [IE
This can prevent battery power from being consumed when Vq is low.
一方、上記装置では上述したようにスインチング素子３
００オン・オフを制御して定電圧出力を倚ているが、こ
こで出力′亀圧勿ＶＯｕ４＋スイッチング周期を′ｌ゛
、電池入電池入力画用市源入力時のスイッチング素子の
オン時間をそれぞれ”’ＯｎＢ及びＴ。ｎ０ｓＦランス
２０の二Ｆ 巻ＩＩ ２０２の巻数を１１８とすると、
となる。従って（Ｊ、）式が成立している場合、となシ
、開用電源人力時の１？ □ ｎ Ｏ／ Ｔは極めて／
ｊ・さくなる。また該Ｔ。ｎｃ／Ｔ及びＴ。ｎ Ｂ／”
’はデユーティ比と称され、該デユーティ比が小さい程
１半導体素子等の電流利用率が悪く、損失が犬となる。On the other hand, in the above device, the switching element 3
00 ON/OFF is controlled to maintain a constant voltage output, but here the output 'turquoise pressure VOU4 + switching period' is 'l', and the on time of the switching element when the battery is inserted and the battery input is input, respectively. ``'OnB and T. n0sF lance 20's 2nd F winding II If the number of turns of 202 is 118, then if the formula (J,) holds true, then 1 when the open power supply is operated manually? □ n O/ T is extremely/
j・It gets smaller. Also, the T. nc/T and T. nB/”
' is called a duty ratio, and the smaller the duty ratio, the worse the current utilization rate of one semiconductor element, etc., and the greater the loss.
ｆ追ってトランスの一次善線の巻数を調整７ して特
定の直流電源の障害時以外に他の直流電源の電力消費を
停止させることは上記特定の直流電源入力時の電力変換
効率を著しく悪化させる欠点を有していた。Adjusting the number of turns of the suboptimal wire of the transformer in order to stop the power consumption of other DC power supplies except when a specific DC power supply fails will significantly deteriorate the power conversion efficiency when the above-mentioned specific DC power supply is input. It had drawbacks.
本発明は上記従来の欠点を除くため、トランスの一次巻
線とスイッチング素子との直列回路に直流電源を接続し
、該スイッチング菓子全オン・オフ制御することによシ
該トランスの二Ｖ（巻線の負荷に所望の電圧値の直流電
力を供給する電力変換効率において、上記直流電源の端
子電圧を恢出し該ＩＫ流電源が正常か障害かを判定する
電圧検出回路を設けるとともに、スイッチ回路と第２の
直流電源との直列回路を上記直流電源と並列に少なくと
も一個設け、該スイッチ回路を上記電圧検出回路によシ
上記直流電源が正常の時にオフし、障害の時にオンする
よう制御するようになしたもので、その目的とするとこ
ろは信頼性が高くかつ常に電力変換効率の高い装置を実
現することにある。以下、図面について詳細に説明する
。In order to eliminate the above-mentioned conventional drawbacks, the present invention connects a DC power supply to the series circuit of the primary winding of the transformer and the switching element, and controls the switching confectionery to turn on and off. In terms of power conversion efficiency for supplying DC power of a desired voltage value to a line load, a voltage detection circuit is provided to calculate the terminal voltage of the DC power supply and determine whether the IK current power supply is normal or faulty, and a switch circuit and a switch circuit are provided. At least one series circuit with a second DC power supply is provided in parallel with the DC power supply, and the switch circuit is controlled by the voltage detection circuit to turn off when the DC power supply is normal and turn on when there is a failure. The purpose is to realize a device that is highly reliable and always has high power conversion efficiency.The drawings will be described in detail below.
第２図は本発明の一実施例を示すもので、図中、従来例
と同一構成部分は同一符号ケもって表わす。即ち、１０
− Ｊ、 、 Ｊ、 Ｏ−２は直流電源、２０はトラン
ス、３０はスイッチングトランジスタ、４０は制御・駆
動回路、５０−］は接続用ダイオード、θ】、６２は整
流用ダイオード、６３は平滑用コイル、６４ｉｌ−１：
平滑用コンデンサ、７は負荷、８は電圧検出回路、９は
スイッチ回路である。ここで直流電源］０−」の方が常
時、電力を供給するもので、その電圧はＶＣとし、また
直流電源」０−２の電圧（はｖＢとする。FIG. 2 shows an embodiment of the present invention, and in the figure, the same components as in the conventional example are denoted by the same reference numerals. That is, 10
- J, , J, O-2 is a DC power supply, 20 is a transformer, 30 is a switching transistor, 40 is a control/drive circuit, 50-] is a connecting diode, θ], 62 is a rectifying diode, 63 is a smoothing Coil, 64il-1:
A smoothing capacitor, 7 a load, 8 a voltage detection circuit, and 9 a switch circuit. Here, the DC power supply [0-2] always supplies power, and its voltage is VC, and the voltage of the DC power supply [0-2] is vB.
電圧検出回路８は直流電源１０− Ｊの両端間に並列に
接続きれ、その電圧を検出し、該電圧が直流電源１０−
１の正常時の電圧Ｖ（、よりわずかに低目に設定した電
圧Ｖｃ′より高いか低いかを調べ、より高い場合には正
常と判定しスイッチ回路をオフし、より低い鴨＠ＶＣは
障害と判定しスイッチ回路ｒオンする制ＸＩ（ｇ号ケス
イッチ回路９に送出する如くなっている。スイッチ回路
９は直流電源］Ｏ−２に直列に接続されておシ、」二記
′覗圧検出回路８からの制御信号に従ってオン・オフす
る如く動作する。The voltage detection circuit 8 is connected in parallel between both ends of the DC power supply 10-J and detects the voltage.
Check whether the normal voltage V (1) is higher or lower than the slightly lower voltage Vc', and if it is higher, it is determined to be normal and the switch circuit is turned off, and if it is lower, it is a fault. It is determined that the switch circuit r turns on and sends the signal to the switch circuit 9.The switch circuit 9 is connected in series to the DC power source O-2, It operates to turn on and off according to a control signal from the circuit 8.
このような構成となっているため、直流′ｉａ源ｊＯ−
１が正常な時にはスイッチ回路９がオフとなり、直流電
源」０−２の電力は丑ったく消費きれず、直流電源」０
−１が障害となってその電１ｆがｖｃン′より低くなっ
た時にスイッチ回路９かオンし直流電源］Ｏ−２の′電
力が供給される。Because of this configuration, the direct current 'ia source jO-
When 1 is normal, the switch circuit 9 is turned off, and the power of the DC power supply "0-2" is not consumed at all, and the DC power supply "0" is turned off.
-1 becomes a disturbance and its voltage 1f becomes lower than vcn', the switch circuit 9 is turned on, and the DC power supply O-2's power is supplied.
従って直流電源ｌ０−Ｊ、に対するトランス２０の一次
巻線２０１の巻数、例えばＩＩＱと直流電源１、０−２
に対する巻数ｎＢと、各入力電圧ｉｒｃ・Ｖ１３との関
係を
ｎＢ ＶＢ
１、。・ヤ。 −°゛−＝ （４）となるよう設
定することができ、従って電源ｊＯ−】及び１０−２に
対して適切なデユーティ比で動作するよう巻数ｎｃ、ｏ
ｎ ｋ設定することができ、各電源に対する電カメ変換
効率を高くすることができる。Therefore, the number of turns of the primary winding 201 of the transformer 20 for the DC power supply l0-J, for example, IIQ and the DC power supply 1, 0-2
The relationship between the number of turns nB and each input voltage irc·V13 is nB VB 1.・Ya. −°゛−= (4) Therefore, the number of turns nc, o can be set so that it operates at an appropriate duty ratio for the power supply jO−] and 10−2.
n k can be set, and the electric camera conversion efficiency for each power source can be increased.
第３図は上記実施例の具体的な回路を示すものである。FIG. 3 shows a specific circuit of the above embodiment.
即ち、直流電源Ｊ、Ｏ−Ｊは商用電源ＡＣ全整流したも
のであシ、直流電源Ｊ、Ｏ−２は電池Ｅによ！ｌｌ構成
される。電圧検出回路８はツェナー電圧ＶＣ％ツェナー
ダイオ−ｒＺＤと抵抗Ｒ］の直列回路とからなっており
、またスイッチ回路９はトランジスタＱＪ、、Ｑ２と抵
抗１ｔ２．几３とからなっており、Ｃ亥トランジスタＱ
Ｊのベースは抵抗Ｒ２を介してツェナーダイオ−ｒｚ
Ｄと抵抗ＲＪの接続点に接続し、そのコレクタは電源１
０−２とトランス２０の一次巻線２０１との間に挿入さ
れたトランジスタＱ２のベースに接続されている。また
抵抗几３はトランジスタＱ２のベースとコレクタとの間
に接続きれている。In other words, the DC power supplies J and O-J are fully rectified commercial power supplies AC, and the DC power supplies J and O-2 are powered by the battery E! ll configured. The voltage detection circuit 8 consists of a series circuit of a Zener voltage VC% Zener diode rZD and a resistor R], and the switch circuit 9 consists of transistors QJ, , Q2 and resistors 1t2 . It consists of 几3, C亥transistorQ
The base of J is connected to the Zener diode rz via resistor R2.
Connect to the connection point of D and resistor RJ, and its collector is connected to power supply 1.
0-2 and the primary winding 201 of the transformer 20. Further, the resistor 3 is connected between the base and collector of the transistor Q2.
上記構成において、商用電源ＡＣが正常の時、即ちその
整流後の電圧がＶ。ｌより大きい時にはツェナーダイオ
−ｒｚＤに電流が流れトランジスタＱ」がオンし、これ
によりトランジスタＱ２がオフし電池Ｘうの電力がトラ
ンス２０へ供給されるのが妨げられる。また商用電源Ａ
Ｃに障害が発生しその整流後の電圧が■ｃ′よシ小さく
なるとツェナーダイオードＺ １）がオフしトランジス
タＱ１もオフし、これによりトランジスタＱ２がオンし
て電池Ｅからトランス２０へ電力が供給でれるようにな
シ、引き続き負荷７へ電力が供給される。In the above configuration, when the commercial power supply AC is normal, that is, the voltage after rectification is V. When it is larger than 1, a current flows through the Zener diode rzD, turning on the transistor Q, which turns off the transistor Q2 and prevents the power from the battery X from being supplied to the transformer 20. Also, commercial power supply A
When a fault occurs in C and the rectified voltage becomes smaller than ■c', Zener diode Z1) turns off and transistor Q1 also turns off, which turns on transistor Q2 and supplies power from battery E to transformer 20. As soon as the power is released, power is continued to be supplied to the load 7.
なお、これまでの実施例では直流電源が２個のものにつ
いて述べたが、３個以上であっても同様に適用でき、そ
の効果も同様である。また直流電源を３個以上設けた場
合、各電源肋に電圧検出回路を設けて、それよシ優先順
位の低い電源に接続したスイッチ回路を個々にオン・オ
フ制御させる如くなしてもよいし、優先順位の同等な２
個以上の電源をそれよシ優先順位の高い電源の電圧検出
回路によって一括してオン・オフ制御する如くなしても
よい。Although the embodiments described above have been described with two DC power supplies, the present invention can be similarly applied even with three or more DC power supplies, and the effects are also the same. In addition, when three or more DC power supplies are provided, a voltage detection circuit may be provided for each power supply, and switch circuits connected to power supplies with lower priority may be individually controlled to turn on and off. 2 with equal priority
It is also possible to control on/off of more than one power supply at once by a voltage detection circuit of a power supply with a higher priority.
また電力変換形式としてはフォワード形コンバータを例
にとって説明したが、フライバンク形１ブリッジ形等、
他の形式のものにも同様に適用できる。In addition, although the forward type converter has been explained as an example of the power conversion format, there are other power conversion types such as the flybank type and one bridge type.
It can be applied to other formats as well.
以上説明したように本発明によれば、トランスの一次巻
線とスイッチング系子との直列回路に直流電源を接続し
、該スイッチング系子をオン・オフ制御することにょシ
該トランスの二次巻線の負荷に所望の電圧値の直流電力
を供給する電力変換装置において、上記直流電源の端子
電圧を検出し該直流電源が正常か障害かを判定する電圧
検出回路を設けるとともに、スイッチ回路と第２の直流
電源との直列回路を上記直流電源と並列に少なくとも一
個設け、該スイッチ回路を上記電圧検出回路により上記
直流電源が正常の時にオフし、障害の時にオンするよう
割御するようになしたので、常時は上記直流電源のみケ
トランスに接続し、該直流電源の障害時Ｖこ上記第２の
旦流電ｆｐ、をトランスに接敢１：きせることかでき、
装置の信頼性を高めることがでさ、各直流電源に対する
トランスの巻線数を各直流電源の全てに対して電力変換
効率が尚くなるよう設定でき、従って商用′嘔源ｔ−イ
ψυＩＬシた直流電源と電池による直流電源とを使用し
て電池の無用な放電紫防さ゛、かつ商用電源に対する電
力変換効率も尚い装置勿提供することができる、ｑの４
ｕ点がある。As explained above, according to the present invention, a DC power supply is connected to the series circuit of the primary winding of the transformer and the switching system, and the secondary winding of the transformer is connected to turn on and off the switching system. A power conversion device that supplies DC power of a desired voltage value to a load on a line is provided with a voltage detection circuit that detects the terminal voltage of the DC power supply and determines whether the DC power supply is normal or faulty, and also includes a switch circuit and a voltage detection circuit. At least one series circuit with the DC power supply No. 2 is provided in parallel with the DC power supply, and the switch circuit is controlled by the voltage detection circuit to turn off when the DC power supply is normal and turn on when there is a failure. Therefore, only the above DC power supply is normally connected to the transformer, and when the DC power supply fails, the above second current fp can be applied to the transformer.
By increasing the reliability of the device, the number of turns of the transformer for each DC power source can be set so that the power conversion efficiency is still high for all of the DC power sources. By using a DC power supply with a battery and a DC power supply with a battery, it is possible to prevent unnecessary discharge of the battery, and also provide power conversion efficiency with respect to commercial power supply.
There is point u.
図面は本発明の説明に供するもので、第１図は従来の電
力変換装置の一例全示すブロック図、第２図は本発明の
電力変換装置の一実施例を示すブロック図、第３図は第
２之の装置の具体的な構成を示す回路図である。
ＪＯ−Ｊ、、ｌｏ−２・・直流電源、２０・・・トラン
ス、３０・・・スイッチングトランジスタ、４０・′・
制＋１ＵＩ−駆動回路、５０−ｊ・・・接続用グイオー
ド、７・・・負荷、８・・・電圧検出回路、９・・・ス
イッチ回路。
特許出願人 日本′峨信電ｄ古公社
代理人 弁理士 吉 １）精 孝
第１図
第２因The drawings serve to explain the present invention. FIG. 1 is a block diagram showing an example of a conventional power conversion device, FIG. 2 is a block diagram showing an embodiment of the power conversion device of the present invention, and FIG. 3 is a block diagram showing an example of a conventional power conversion device. FIG. 2 is a circuit diagram showing a specific configuration of a second device. JO-J, lo-2... DC power supply, 20... Transformer, 30... Switching transistor, 40...
control+1UI-drive circuit, 50-j... connection guide, 7... load, 8... voltage detection circuit, 9... switch circuit. Patent applicant: Japan's Ashinden Telecommunications Co., Ltd. Agent: Patent attorney: Yoshi 1) Takashi Sei, Figure 1, Cause 2
Claims (1)
直流電源ケ接続し、該スイッチング系子をオン・オフ制
御することに°より該トランスの二次巻線の負荷に所望
の電圧値の直流電力を供給する電力変換装置において、
上記直流電源の端子電圧を検出し該直流電源が正′、ｔ
１τか障害かを判定する電圧検出回路を設ける。ととも
に、スイッチ回路と第２の直流電源との直列回路を上記
直流電源と並列に少なくとも一個設け、該スイッチ回路
を上記電圧検出回路により上記直流電源が正常の時にオ
フし、障害の時にオンするよう制御するようになしだこ
とを特徴とする電力変換装（置。By connecting a DC power source to a series circuit of the primary winding of the transformer and a switching element, and controlling the switching system on and off, DC power of a desired voltage value is applied to the load of the secondary winding of the transformer. In a power conversion device that supplies
The terminal voltage of the DC power supply is detected and the DC power supply is positive', t.
A voltage detection circuit is provided to determine whether it is 1τ or a failure. In addition, at least one series circuit of a switch circuit and a second DC power supply is provided in parallel with the DC power supply, and the switch circuit is turned off by the voltage detection circuit when the DC power supply is normal and turned on in the event of a failure. A power conversion device (device) characterized in that it is controlled so as to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58051579A JPS59178967A (en) | 1983-03-29 | 1983-03-29 | Power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58051579A JPS59178967A (en) | 1983-03-29 | 1983-03-29 | Power converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59178967A true JPS59178967A (en) | 1984-10-11 |
| JPH0145314B2 JPH0145314B2 (en) | 1989-10-03 |
Family
ID=12890850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58051579A Granted JPS59178967A (en) | 1983-03-29 | 1983-03-29 | Power converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59178967A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005110378A (en) * | 2003-09-29 | 2005-04-21 | Densei Lambda Kk | Power supply and battery unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4962132U (en) * | 1972-09-11 | 1974-05-31 | ||
| JPS5792226U (en) * | 1980-11-21 | 1982-06-07 |
-
1983
- 1983-03-29 JP JP58051579A patent/JPS59178967A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4962132U (en) * | 1972-09-11 | 1974-05-31 | ||
| JPS5792226U (en) * | 1980-11-21 | 1982-06-07 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005110378A (en) * | 2003-09-29 | 2005-04-21 | Densei Lambda Kk | Power supply and battery unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0145314B2 (en) | 1989-10-03 |
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