JPS6323513A - Electric source protective circuit - Google Patents
Electric source protective circuitInfo
- Publication number
- JPS6323513A JPS6323513A JP16731286A JP16731286A JPS6323513A JP S6323513 A JPS6323513 A JP S6323513A JP 16731286 A JP16731286 A JP 16731286A JP 16731286 A JP16731286 A JP 16731286A JP S6323513 A JPS6323513 A JP S6323513A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- short
- output
- output terminal
- circuited
- 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.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 title 1
- 238000009499 grossing Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、屋内、屋外の二つのユニットより構成される
システムにＪ３いて、屋内機より屋外機への電源を供給
する電源部の電源保護回路に関覆るものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to a power protection circuit of a power supply unit that supplies power from an indoor unit to an outdoor unit in a system consisting of two units, an indoor unit and an outdoor unit. It is completely different.
従来の技術
従来の電源保護回路は第３図に示すような回路構成にな
っていた。すなわち、屋外ＩＩＡへの出力端子Ｂに接続
されて、規定された電圧を超えないように選定されたツ
ェナーダイオードＣ（ツェナーダイオードＣのツェナー
電圧Ｖｚが平滑回路りの入力電圧Ｖｉｎとこのツェナー
タイオードＣに印加される平滑回路りの出力電圧Ｖｏｕ
ｔの間になるようにＶｏｕｔ ＜Ｖｚ ＜Ｖｉｎに選定
される）は、通常 ＯＦ＝ Ｆ状態になっている。とこ
ろが、平滑回。Prior Art A conventional power supply protection circuit has a circuit configuration as shown in FIG. That is, a Zener diode C is connected to the output terminal B to the outdoor IIA and selected so as not to exceed a specified voltage (the Zener voltage Vz of the Zener diode C is connected to the input voltage Vin of the smoothing circuit and this Zener diode The output voltage Vou of the smoothing circuit applied to C
(Vout < Vz < Vin) is normally in the OF=F state. However, smooth times.
路りにおける入力端子Ｅと出力端子［を短絡した場合、
Ｖｏｕｔ＝Ｖｉｎとなり、Ｖｏｕｔ＞Ｖｚとなることに
よりツェナーダイオードＣはＯＮ状態となり、→ノイリ
スタＧをＯＮにする。これにより、出力端子Ｂは接地間
と短絡されたことになり、ヒコーズｌ−１には規定電流
値以上が流れ、これにＪ、リヒューズ１」はとび、出力
端子Ｂには規定以上、づなわち ＶｚＬＸ上の電圧は出
力されないことになる。When input terminal E and output terminal [on the road are short-circuited,
When Vout=Vin and Vout>Vz, the Zener diode C is turned on, and the Neuristor G is turned on. As a result, output terminal B is short-circuited to ground, and a current exceeding the specified value flows through Hikozu l-1, causing J and refuse 1 to jump, and output terminal B is connected beyond the specified value. Therefore, the voltage on VzLX will not be output.
また、出力端子Ｂが接地間と短絡されても、ヒコース′
ト１がとぶことにＪ、−）で回路は保護８れる。Also, even if output terminal B is short-circuited to ground,
The circuit is protected by J, -) when the first one jumps.
発明が解決しようと覆る問題点
しかし、このような構成のもとでは、屋内受信機本体を
電源に投入した場合、突入電流により本来の目的以外に
ヒコーズがとんでしまったり、また−度とぶと、ヒコー
ズの交換が必要となり保守上の問題もあった。Problems that the invention attempts to solve However, with this configuration, when the indoor receiver is turned on, the hikoze may be blown off for a purpose other than its original purpose due to an inrush current, or it may cause a sudden jump. However, there were maintenance problems as the Hikozu needed to be replaced.
本発明は上記問題点を解決するしので、ヒコーズを必要
と覆ることがなく、しかもホールドバック型の出力特性
を持たせることにより短絡電流を少なく覆−ることかで
きる電源保護回路を提供覆ることを目的どするものであ
る。The present invention solves the above-mentioned problems, and therefore provides a power supply protection circuit that does not require the need to cover the power source and can reduce short-circuit current by providing a holdback type output characteristic. The purpose is to
問題点を解決するための手段
上記問題点を解決づ−るために本５を明は、機器の外部
に供給覆る電源供給回路に平滑回路の人出力が短絡した
ときに導通するツＩナーダイＡ−ドを介して電源供給路
を遮断する］ヘランジスタを設【ノ、外部への出力端子
が接地間と短絡したどきに前記トランジスタを遮断する
短絡保護回路を設（）たものである、。Means for Solving the Problems In order to solve the above problems, Book 5 describes the power supply circuit that supplies power to the outside of the equipment and the power supply circuit that covers the equipment. - A short-circuit protection circuit is installed to cut off the transistor when the output terminal to the outside is short-circuited to ground.
作用
」ニ記構成にＪ、す、規定以上の電圧がいかなる場合に
も屋外機と接続される出力端子に出力されることなく、
また出力端子が接地間と短絡し′Ｃも短絡保護回路が働
き、正常状態になれば出力端子に規定の電圧が自動的に
復帰ザるので屋内受信機の内部にはヒユーズを必要と覆
ることもなく、またヒコース゛がどんだ場合の交換など
の保守上の問題も解決される。また、短絡保護回路は出
力端子が接地と短絡した場合ホールドバック型の出力特
性を持つことになり、短絡電流を少なくすることができ
て、短絡時のトランジスタなどのディレーティング設目
上の問題も軽減される。。The configuration described in section 2.2.2.2.2. In any case, a voltage higher than the specified voltage will not be output to the output terminal connected to the outdoor unit.
In addition, if the output terminal is short-circuited to ground, the short-circuit protection circuit will be activated, and when the normal state is restored, the specified voltage will be automatically restored to the output terminal, so it is necessary to install a fuse inside the indoor receiver. This also solves maintenance problems such as replacement when the current is too low. In addition, the short-circuit protection circuit has a holdback type output characteristic when the output terminal is short-circuited to ground, which reduces the short-circuit current and prevents problems with derating design of transistors etc. in the event of a short-circuit. Reduced. .
実施例
以下本発明の一実施例を図面に基づいて説明する。第１
図において、まず電源部の平滑回路１の入力端子２ど出
力端子３における電圧を各々Ｖｉ口。EXAMPLE An example of the present invention will be described below based on the drawings. 1st
In the figure, first, the voltages at the input terminal 2 and output terminal 3 of the smoothing circuit 1 of the power supply section are set to Vi.
Ｖｏｕｔどし、Ｖｏｕｔが加えられるツ■ツーダイＡｔ
”Ｉ （Ｄ ツ］ニーＪ−−電圧Ｖ７はＶｏｕｔ ＜
ＶＺ ＜ Ｖ ｉｎどなるように選択されている。入出
力端子２．３間を短絡するど、出力電圧■ｏｕｔは入力
電圧■ｉｎに等しくイｒす、ツ１ノーダイオード４に印
加される電圧がツ［ナー電圧ＶｚＬＸ上となって、ツェ
ナーダイオード４はＯＮとなり、したがってトランジス
タ５はＯＮ、トランジスタ６はＯＦ Ｆとなり、トラン
ジスタ７はＯＦＦとなるため、出力端子８には出力電圧
は現れなくなる。Vout, Vout can be added
”I (D ツ) Knee J--Voltage V7 is Vout <
It is selected such that VZ < V in. When the input and output terminals 2 and 3 are short-circuited, the output voltage (output) becomes equal to the input voltage (in), and the voltage applied to the Zener diode 4 becomes above the Zener voltage VzLX, which causes the Zener diode to Since transistor 4 is turned on, transistor 5 is turned on, transistor 6 is turned off, and transistor 7 is turned off, no output voltage appears at output terminal 8.
また、出力端子８を介して供給される屋外機９への電流
ｉが規定電流値を超えるとＯＮとなるＪ、うに設定され
た抵抗値を持つ抵抗１０により１〜ランジスタ１１はＯ
Ｎとなり、したがって平滑回路１の出力電圧Ｖｏｕｔは
トランジスタ５のベースに直接加えられて、１−ランジ
スタ５はＯＮ、 トランジスタ６はＯＦＦとなり、トラ
ンジスタ７はＯＦＦとなる。この短絡条件の場合におい
ては、第２図に示すホールドバック型特性にＪ：リトラ
ンジスタ７はディレーティング上保護された形になる。Also, when the current i supplied to the outdoor unit 9 via the output terminal 8 exceeds a specified current value, the resistor 10 having a resistance value set to ON turns on the transistors 1 to 11.
Therefore, the output voltage Vout of the smoothing circuit 1 is directly applied to the base of the transistor 5, and the transistor 5 is turned on, the transistor 6 is turned off, and the transistor 7 is turned off. In the case of this short-circuit condition, the J:retransistor 7 has a holdback type characteristic shown in FIG. 2 and is protected from derating.
ここで、コンデンサ１２は短絡時の短！１８電流１ｓが
多く流れるのを防ぐために用いられる。Here, the capacitor 12 is short-circuited! This is used to prevent too much current 1s from flowing.
こうした各々の場合においても、入出力端子２゜３間の
短絡条件、または出力端子８と接地間の短絡条件が取り
除かれ、再び正常な状態になると、出力端子８には規定
の出力電圧が出力され、屋外機９に供給される。In each of these cases, when the short-circuit condition between the input and output terminals 2 and 3 or the short-circuit condition between the output terminal 8 and the ground is removed and the condition returns to normal, the specified output voltage will be output to the output terminal 8. and is supplied to the outdoor unit 9.
北門の効果
以上のように本発明によれば、平滑回路の入出力間を短
絡した場合にも出力されることがなく、また、出力端子
が接地間と短絡しても自動復帰型のホールドバック特性
を・６つ短絡保護回路により短絡電流を少なくすること
かできて、デイレーブーイング上敢熱板を小さくするこ
とができ、またヒコーズなどを用いた保護回路に比べ保
守上も容易になるという効果が得られる。Effect of Kitamon As described above, according to the present invention, no output is generated even if the input and output of the smoothing circuit are short-circuited, and even if the output terminal is short-circuited to the ground, there is an automatic recovery type holdback. Features: 6 short-circuit protection circuits can reduce short-circuit current, reduce the size of the delay-boosting heat plate, and are easier to maintain than protection circuits using Hikozu, etc. Effects can be obtained.
第１図は本発明の電源保護回路の一実施例を示づ回路図
、第２図は同電源保護回路のホールドバック型の特性を
もつ出力電圧特性図、第３図は従来の電源保護回路の回
路図である。
１・・・平滑回路、４・・・ツｌブーダイΔ−ド、５゜
６．７．１１・・何〜ランジスタ、８・・・出力端子、
９・・・屋外機、１０・・・抵抗、１２・・・＝１ンデ
ン→）代理人 森 木 へ 弘
第ｒ図
屋内１屋りＵ
２−１入力！）
４−０．ツエテーハ太→゛
６１、７． ／／ −−−７’ ”／イネーＦ′ｔ、−
戯應）
Ｉｔ）−一一担抗
／２−一、コンヂンリ
第２図
十
第３図Fig. 1 is a circuit diagram showing an embodiment of the power protection circuit of the present invention, Fig. 2 is an output voltage characteristic diagram of the power protection circuit having holdback type characteristics, and Fig. 3 is a conventional power protection circuit. FIG. 1...Smoothing circuit, 4...Tsubo die delta, 5゜6.7.11...What-ranister, 8...Output terminal,
9...outdoor unit, 10...resistance, 12...=1nden →) Agent Mori To Hiro No. R Indoor 1 store U 2-1 input! ) 4-0. Tsuetehata→゛61, 7. // ---7' ”/ine F't,-
GI) It) - 11-tankang / 2-1, Konjinri Figure 2-10 Figure 3
Claims (1)
出力が短絡したときに導通するツェナーダイオードを介
して電源供給路を遮断するトランジスタを設け、外部へ
の出力端子が接地間と短絡したときに前記トランジスタ
を遮断する短絡保護回路を設けた電源保護回路。1. A transistor is installed to cut off the power supply path via a Zener diode that becomes conductive when the input and output of the smoothing circuit of the power supply circuit that supplies the power to the outside of the device is short-circuited, and the output terminal to the outside is short-circuited to the ground. A power supply protection circuit provided with a short-circuit protection circuit that sometimes cuts off the transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16731286A JPS6323513A (en) | 1986-07-15 | 1986-07-15 | Electric source protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16731286A JPS6323513A (en) | 1986-07-15 | 1986-07-15 | Electric source protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6323513A true JPS6323513A (en) | 1988-01-30 |
Family
ID=15847414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16731286A Pending JPS6323513A (en) | 1986-07-15 | 1986-07-15 | Electric source protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6323513A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160352213A1 (en) * | 2014-09-11 | 2016-12-01 | Abb Schweiz Ag | Protective circuit |
-
1986
- 1986-07-15 JP JP16731286A patent/JPS6323513A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160352213A1 (en) * | 2014-09-11 | 2016-12-01 | Abb Schweiz Ag | Protective circuit |
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