JPH0416604Y2 - - Google Patents
Info
- Publication number
- JPH0416604Y2 JPH0416604Y2 JP4224683U JP4224683U JPH0416604Y2 JP H0416604 Y2 JPH0416604 Y2 JP H0416604Y2 JP 4224683 U JP4224683 U JP 4224683U JP 4224683 U JP4224683 U JP 4224683U JP H0416604 Y2 JPH0416604 Y2 JP H0416604Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- frequency power
- power supply
- output
- 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
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000000284 extract Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Description
【考案の詳細な説明】
本考案は、高周波電力の供給源をサージ電圧か
ら保護する装置に関し、特に中波放送装置等の給
電線上で落雷によるスパーク事故やアンテナの着
雪等によつVSWR（電圧定在波比）が異常に大き
くなつた場合、放送機等の高周波電力源を保護す
るサージ保護装置に関する。[Detailed description of the invention] The present invention relates to a device that protects a high-frequency power supply source from surge voltage, and in particular, VSWR ( The present invention relates to a surge protection device that protects a high-frequency power source such as a broadcasting machine when the voltage standing wave ratio (voltage standing wave ratio) becomes abnormally large.
従来、この種のサージ保護装置は、給電線に取
り付けてある方向性結合器より反射電圧のみを検
出し、これを整流検波し、電圧比較回路に入れ放
送機のサージ保護動作を行なわせていた。この従
来方式では給電線のVSWRを直接監視していな
いからサージ電圧に応じた適切な放送機の保護が
できない。例えば放送機の出力インピーダンスの
変化しだいでは、進行波電力が増加したり減少し
たりするから、反射電圧も変化してくる。そうす
ると、サージ保護装置は給電線のVSWRではな
く進行波電力に依存して作動することになる。こ
のため、放送機は反射電力耐量により規定される
ことになつてしまい、VSWR値による耐量規定
が出来ない。このような規定の仕方では、放送機
が振幅変調出力の場合、それほどのVSWR悪化
でない場合においても、変調度が高くなると、こ
の反射電圧が規定レベルを越え、サージ保護装置
が放送機を制御し、出力を止めてしまうことがあ
る。これをさけるためにある一定時間の確認時間
を設けまたは規定レベルを２段階に設定する等の
方策が行なわれるが、このようにするとこの確認
時間のため制御時間が遅くなるという欠点があ
る。 Conventionally, this type of surge protection device detected only the reflected voltage from a directional coupler attached to the power supply line, rectified it, detected it, and put it into a voltage comparison circuit to perform surge protection for the broadcaster. . This conventional method does not directly monitor the VSWR of the power supply line, so it is not possible to protect the broadcasting equipment appropriately in response to surge voltage. For example, as the output impedance of a broadcasting device changes, the traveling wave power increases or decreases, and the reflected voltage also changes. The surge protector then relies on the traveling wave power rather than the VSWR of the feeder to operate. For this reason, the broadcasting equipment is regulated by the reflected power withstand capacity, and the withstand capacity cannot be specified by the VSWR value. With this type of regulation, if the broadcaster outputs amplitude modulation, even if the VSWR does not deteriorate significantly, if the degree of modulation increases, this reflected voltage will exceed the specified level, and the surge protection device will not be able to control the broadcaster. , the output may stop. To avoid this, measures are taken such as providing a certain period of confirmation time or setting the prescribed level in two stages, but this has the disadvantage that the control time becomes slow due to this confirmation time.
本考案の目的は、給電線における高周波電力の
VSWRに正確に対応してその高周波電力の供給
源を制御するサージ保護装置の提供にある。 The purpose of this invention is to reduce high-frequency power in the feeder line.
An object of the present invention is to provide a surge protection device that controls a source of high-frequency power in accordance with VSWR accurately.
本考案によるサージ保護装置の構成は、給電線
における高周波電力の進行波電圧及び反射電圧を
取り出す方向性結合回路と、これら両電圧から反
射係数又は電圧定在波比を演算する回路と、この
演算回路の出力と所定基準値とを比較する回路
と、この比較回路の出力により前記高周波電力の
供給源の作動を制御する回路とを備えることを特
徴とする。 The structure of the surge protection device according to the present invention includes a directional coupling circuit that extracts the traveling wave voltage and reflected voltage of high-frequency power in the power supply line, a circuit that calculates the reflection coefficient or voltage standing wave ratio from these two voltages, and a circuit that calculates the reflection coefficient or voltage standing wave ratio from these two voltages. It is characterized by comprising a circuit that compares the output of the circuit with a predetermined reference value, and a circuit that controls the operation of the high-frequency power supply source based on the output of the comparison circuit.
次に、図面を参照して本考案を詳細に説明す
る。第１図は本考案の一実施例を示すブロツク図
であり、方向性結合回路１と、検波整流回路２，
３と、対数変換回路４，５と、反転増幅回路６
と、加算回路７と、逆対数変換回路８と、電圧比
較回路９と制御回路１０とを備えている。方向性
結合回路１により進行波電圧（V1＋V2）、反射電
圧（V1−V2）として検出された電圧は検波整流
され、演算されて、反射係数roとして出力され
る。この反射係数roを残す電圧を電圧比較回路９
においてある基準電圧と比較し、基準電圧を越え
たとき電圧Vpを制御回路１０に出力し、制御回
路１０により放送機を制御している。 Next, the present invention will be explained in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, which includes a directional coupling circuit 1, a detection rectifier circuit 2,
3, logarithmic conversion circuits 4 and 5, and inverting amplifier circuit 6
, an adder circuit 7 , an antilogarithm conversion circuit 8 , a voltage comparison circuit 9 , and a control circuit 10 . The voltages detected by the directional coupling circuit 1 as a traveling wave voltage (V 1 +V 2 ) and a reflected voltage (V 1 −V 2 ) are detected and rectified, calculated, and output as a reflection coefficient ro. The voltage comparison circuit 9 calculates the voltage that leaves this reflection coefficient ro.
When the reference voltage is exceeded, the voltage V p is outputted to the control circuit 10, and the control circuit 10 controls the broadcasting machine.
以上説明したように、本考案によれば、給電線
における高周波電力のVSWRに正確に対応して
その高周波電力の供給源を制御するサージ保護装
置が提供できる。 As described above, according to the present invention, it is possible to provide a surge protection device that controls the source of high-frequency power in accordance with the VSWR of high-frequency power in a power supply line.
第１図は本考案の一実例を示すブロツク図であ
る。
１……方向性結合回路、２，３……検波整流回
路、４，５……対数変換回路、６……反転増幅回
路、７……加算回路、８……逆対数変換回路、９
……電圧比較回路、１０……制御回路１０。
FIG. 1 is a block diagram showing an example of the present invention. 1... Directional coupling circuit, 2, 3... Detection rectifier circuit, 4, 5... Logarithmic conversion circuit, 6... Inverting amplifier circuit, 7... Addition circuit, 8... Anti-logarithmic conversion circuit, 9
... Voltage comparison circuit, 10 ... Control circuit 10.
Claims (1)
射電圧を取り出す方向性結合回路と、これら両電
圧から反射係数又は電圧定在波比を演算する回路
と、この演算回路の出力と所定基準値とを比較す
る回路と、この比較回路の出力により前記高周波
電力の供給源の作動を制御する回路とを備えるこ
とを特徴とするサージ保護装置。 A directional coupling circuit that extracts the traveling wave voltage and reflected voltage of high-frequency power in a power supply line, a circuit that calculates a reflection coefficient or voltage standing wave ratio from these two voltages, and a comparison between the output of this calculation circuit and a predetermined reference value. and a circuit that controls the operation of the high-frequency power supply source based on the output of the comparison circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4224683U JPS59149433U (en) | 1983-03-24 | 1983-03-24 | surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4224683U JPS59149433U (en) | 1983-03-24 | 1983-03-24 | surge protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59149433U JPS59149433U (en) | 1984-10-05 |
| JPH0416604Y2 true JPH0416604Y2 (en) | 1992-04-14 |
Family
ID=30172801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4224683U Granted JPS59149433U (en) | 1983-03-24 | 1983-03-24 | surge protector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59149433U (en) |
-
1983
- 1983-03-24 JP JP4224683U patent/JPS59149433U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59149433U (en) | 1984-10-05 |
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