JPS6126294B2 - - Google Patents
Info
- Publication number
- JPS6126294B2 JPS6126294B2 JP11485177A JP11485177A JPS6126294B2 JP S6126294 B2 JPS6126294 B2 JP S6126294B2 JP 11485177 A JP11485177 A JP 11485177A JP 11485177 A JP11485177 A JP 11485177A JP S6126294 B2 JPS6126294 B2 JP S6126294B2
- Authority
- JP
- Japan
- Prior art keywords
- positive
- voltage
- resistor
- relay
- series 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
- 238000001514 detection method Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 101150007441 MRL1 gene Proteins 0.000 description 2
- 101100496043 Monascus ruber citA gene Proteins 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】
本発明は正負出力電源の電圧不平衡検出回路に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a voltage unbalance detection circuit for positive and negative output power supplies.
従来の正負出力電源における電圧不平衡検出の
方法は、第１図に示すようにインバータトランス
の出力巻線に中点を設けるか、あるいは第２図の
ように正負出力端に低インピーダンスの抵抗で電
位的中点を設けて、この中点とアース間にリレー
を接続し、電圧不平衡の際にリレー作動すること
により検出するものであつた。 Conventional methods for detecting voltage imbalance in positive and negative output power supplies include providing a midpoint on the output winding of the inverter transformer as shown in Figure 1, or installing low impedance resistors at the positive and negative output terminals as shown in Figure 2. A potential midpoint was provided, a relay was connected between this midpoint and the ground, and voltage imbalance was detected by activating the relay.
しかしながら、第１図および第２図の従来構成
においては、電圧監視リレーと不平衡検出用リレ
ーの２つのリレーを必要とするため装置が大きく
なるという欠点がある。 However, the conventional configurations shown in FIGS. 1 and 2 require two relays, a voltage monitoring relay and an unbalance detection relay, resulting in a disadvantage that the device becomes large.
本発明の目的は、不平衡検出用リレーを電圧監
視リレーと兼用することにより上述の欠点を解消
し小型の電圧不平衡検出回路を提供することにあ
る。 SUMMARY OF THE INVENTION An object of the present invention is to provide a compact voltage unbalance detection circuit that eliminates the above-mentioned drawbacks by using an unbalance detection relay also as a voltage monitoring relay.
第３図に本発明の構成を示す。出力端は抵抗Ｒ
１，Ｒ２（Ｒ１＝Ｒ２）によつて、アースに対し
て正負の等しい電位を保つている。抵抗Ｒ３′，
Ｒ３″（Ｒ３＝Ｒ３′＋Ｒ３″）とメータリレー
MRL１は出力端子間の電圧監視用である。Ｒ
３′とＲ３″により出力電圧をほぼ等しく分圧して
電位的な中点を得るようにし、その点とアース間
に向かい合わせにしたダイオードＤ１，Ｄ２と電
流制御用抵抗Ｒ４の直列回路を接続する。いま出
力電圧V0で、メータリレーに流れる電流がI1の時
中央の位置にあるとする。中点はＲ３′とＲ３″に
より分圧され、アースとほぼ等しい電位にあるの
で、直列回路Ｒ４，Ｄ１，Ｄ２には電流は流れず
（ＩD＝０）、正常な動作を維持する。正出力端と
アース間のインピーダンスが小さくなつた場合の
等価回路は第４図で表わさる。Ｄ１，Ｄ２のツエ
ナー電圧をV0より小さく選んでおくと、Ｄ１を
通してツエナー電流ＩD1が流れるので、Ｒ４の値
をメータリレーの正側動作電流値I1（＋）以上の
電流を流すようにすると、正出力端異常の場合の
検出ができる。また負出力端とアース間のインピ
ーダンスが小さくなつた場合の等価回路は第５図
で表わされ、メータリレーを流れる電流がＤ２の
ツエナー電流分ＩD2だけ分流され、負側動作電流
値I1（−）以下になるように定数を選ぶと、負出
力端異常の検出ができる。 FIG. 3 shows the configuration of the present invention. Output end is resistor R
1 and R2 (R1=R2), equal positive and negative potentials are maintained with respect to the ground. Resistance R3',
R3″ (R3=R3′+R3″) and meter relay
MRL1 is for voltage monitoring between output terminals. R
3' and R3'' divide the output voltage almost equally to obtain a potential midpoint, and connect a series circuit of diodes D1 and D2 facing each other and current control resistor R4 between that point and ground. .Now assume that the output voltage is V 0 and the current flowing through the meter relay is at the center position when it is I 1.The middle point is divided by R3' and R3'' and is at almost the same potential as ground, so the series circuit No current flows through R4, D1, and D2 (I D =0), maintaining normal operation. The equivalent circuit when the impedance between the positive output terminal and the ground becomes small is shown in FIG. If the zener voltage of D1 and D2 is selected to be smaller than V 0 , the zener current I D1 will flow through D1, so set the value of R4 so that a current greater than the positive operating current value I 1 (+) of the meter relay flows. Then, it is possible to detect an abnormality at the positive output end. The equivalent circuit when the impedance between the negative output terminal and the ground becomes small is shown in Fig. 5, where the current flowing through the meter relay is shunted by the Zener current I D2 of D2, and the negative side operating current value I 1 If the constant is selected to be less than or equal to (-), it is possible to detect an abnormality at the negative output end.
一般に正負出力電源の不平衡を検出するには、
インバータトランスに中点を設けたり、出力端の
インピーダンスを小さくする必要があつたが、本
発明によれば、出力電圧監視用のメータリレー回
路を利用することにより、小さい部品点数で正負
出力電源装置における正負出力電圧の不平衡を容
易に検出できる。 Generally, to detect imbalance between positive and negative output power supplies,
It was necessary to provide a midpoint in the inverter transformer or to reduce the impedance at the output end, but according to the present invention, by using a meter relay circuit for output voltage monitoring, a positive/negative output power supply device with a small number of parts can be achieved. Unbalance between positive and negative output voltages can be easily detected.
第１図、第２図は従来の出力電圧監視機能をも
つ一石式コンバータにおける出力電圧不平衡検出
回路を示す。第３図は本発明による出力電圧不平
衡検出回路を示し、第４図および第５図は、第３
図の回路において正出力端および負出力端のイン
ピーダンスが小さくなつた場合の等価回路を示
す。
Ｒ１，Ｒ２，Ｒ３，Ｒ３′，Ｒ３″，Ｒ４…抵
抗、Ｄ１，Ｄ２…定電圧ダイオード、MRL１…
メータリレー、RL１…リレー、Ａ…整流および
平滑回路。
FIGS. 1 and 2 show a conventional output voltage unbalance detection circuit in a single-stone converter having an output voltage monitoring function. FIG. 3 shows an output voltage imbalance detection circuit according to the present invention, and FIGS.
An equivalent circuit is shown when the impedance of the positive output terminal and the negative output terminal becomes small in the circuit shown in the figure. R1, R2, R3, R3', R3'', R4...Resistor, D1, D2... Constant voltage diode, MRL1...
Meter relay, RL1... Relay, A... Rectifier and smoothing circuit.
Claims (1)
ータリレーと抵抗よりなる直列回路を正負出力両
端間に接続し、該直列回路の電位的中点とアース
間に極性を向かい合わせに接続した定電圧ダイオ
ードと抵抗よりなる第２の直列回路を接続したこ
とを特徴とする電圧不平衡検出回路。1 In a power supply device with positive and negative outputs, a series circuit consisting of a voltage monitoring meter relay and a resistor is connected between the positive and negative output terminals, and a constant voltage diode is connected between the potential midpoint of the series circuit and ground with the polarities facing each other. A voltage unbalance detection circuit characterized in that a second series circuit consisting of a resistor and a resistor are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11485177A JPS5448057A (en) | 1977-09-22 | 1977-09-22 | Voltage unbalance detector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11485177A JPS5448057A (en) | 1977-09-22 | 1977-09-22 | Voltage unbalance detector circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5448057A JPS5448057A (en) | 1979-04-16 |
| JPS6126294B2 true JPS6126294B2 (en) | 1986-06-19 |
Family
ID=14648286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11485177A Granted JPS5448057A (en) | 1977-09-22 | 1977-09-22 | Voltage unbalance detector circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5448057A (en) |
-
1977
- 1977-09-22 JP JP11485177A patent/JPS5448057A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5448057A (en) | 1979-04-16 |
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