JPH03277006A - High frequency power output control method - Google Patents
High frequency power output control methodInfo
- Publication number
- JPH03277006A JPH03277006A JP7802190A JP7802190A JPH03277006A JP H03277006 A JPH03277006 A JP H03277006A JP 7802190 A JP7802190 A JP 7802190A JP 7802190 A JP7802190 A JP 7802190A JP H03277006 A JPH03277006 A JP H03277006A
- Authority
- JP
- Japan
- Prior art keywords
- output
- frequency power
- vswr
- high frequency
- pulse width
- 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
- 238000000034 method Methods 0.000 title claims description 11
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 230000005856 abnormality Effects 0.000 claims description 20
- 230000007423 decrease Effects 0.000 claims description 5
- 238000003079 width control Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 238000003786 synthesis reaction Methods 0.000 abstract description 7
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Transmitters (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高周波電力出力制御方法に関し、特に複数の高
周波で電力増幅器をハイブリッド合成して高出力を得る
パルス幅変調方式の中波放送機の高周波電力出力制御方
法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a high frequency power output control method, and particularly to a method for controlling high frequency power output, and in particular for a medium wave broadcaster using a pulse width modulation method that hybrid-synthesizes power amplifiers at multiple high frequencies to obtain high output. This invention relates to a high frequency power output control method.
従来、この種の中波放送機は、複数の高周波電力増幅器
のうちｍ台が故障すると下記の（１）式に示す如く出力
が低下する。Conventionally, in this type of medium wave broadcasting machine, when m units out of a plurality of high frequency power amplifiers fail, the output decreases as shown in equation (1) below.
Ｐｏ ＝本来の出力電力ｎ：高周波電力増幅器の数また
、高周波電力増幅器の出力が、給電線のＶＳＷＲの変動
により変化するため、ある設定されたＶＳＷＲの値まで
は高周波電力増幅器が増えても耐えるように設定されて
いる。Po = Original output power n: Number of high-frequency power amplifiers Also, since the output of high-frequency power amplifiers changes due to fluctuations in VSWR of the feeder line, it can withstand even if the number of high-frequency power amplifiers increases up to a certain set VSWR value. It is set as follows.
例えば、２ＫＷ出力の高周波電力増幅器を６台使用した
ｌ０ＫＷ中波放送機の場合、高周波電力増幅器が１台故
障すると放送機出力は、（１）式から
６
なり約７０％に出力が低下する。For example, in the case of a 10KW medium wave broadcaster that uses six high frequency power amplifiers with a 2KW output, if one high frequency power amplifier fails, the broadcaster output will be 6 from equation (1), which will reduce the output to about 70%.
また、この高周波電力増幅器は通常、シングルエンドプ
ッシュプルのたすき掛は回路を採用しているため、その
出力ＰＰＡは次の（２）式のようになる。Further, since this high-frequency power amplifier normally employs a single-end push-pull cross-over circuit, its output PPA is expressed by the following equation (2).
ｖｏ ：高周波電力増幅器の電圧、Ｒ：高周波電力増幅
器の負荷インピーダンス
この高周波電力増幅器が、ＶＳＷＲ＝２まで連続使用可
能であるとすると、この高周波電力増幅器の最大出力は
次の（３）式により決まる。■５ＷＲ＝２の時、出力が
最大となるのは負荷インピーダンスＲが１／２となる時
で５この出力Ｐ”ＰＡは、
よって、ＶＳＷＲ＝２！で連続使用可能という条件を満
足するためには、ＶＳＷＲ＝１の場合で考えると２倍の
出力余裕をもつことになる。vo: Voltage of the high frequency power amplifier, R: Load impedance of the high frequency power amplifier Assuming that this high frequency power amplifier can be used continuously up to VSWR = 2, the maximum output of this high frequency power amplifier is determined by the following equation (3). . ■5 When WR = 2, the output reaches its maximum when the load impedance R becomes 1/2, and this output P''PA is, Therefore, in order to satisfy the condition that continuous use is possible at VSWR = 2! When considering the case where VSWR=1, this means that the output margin is twice as large.
上述した従来の中波放送機は、ＶＳＷＲの良い場合にお
いても、高周波電力増幅器が１台でも故障すると出力が
低下するという欠点がある。The above-mentioned conventional medium wave broadcasting machine has a drawback that even if the VSWR is good, the output will decrease if even one high frequency power amplifier fails.
〔課題を解決するための手段〕
本発明の高周波電力出力制御方法は、複数のパルス幅変
調方式による高周波電力増幅器をハイブリッド合成して
高出力を得る送信機における前記複数の高周波電力増幅
器のそれぞれの異常を検出する異常検出回路と、前記複
数の高周波電力増幅器の合成出力から進行波と反射波を
検出し電圧定在波比（ＶＳＷＲ）を演算するＶＳＷＲ検
出回路と、前記異常検出回路とＶＳＷＲ検出回路の出力
にもとづいて前記複数の高周波電力増幅器に供給するパ
ルス幅変調信号入力のパルス幅を前記送信機が正規の出
力を維持するかもしくは出力減少を最小限にとどめるよ
うに制御するパルス幅制御回路とを備えて構成される。[Means for Solving the Problems] The high-frequency power output control method of the present invention provides a high-frequency power output control method for each of the plurality of high-frequency power amplifiers in a transmitter that obtains high output by hybrid-synthesizing high-frequency power amplifiers using a plurality of pulse width modulation methods. an abnormality detection circuit that detects an abnormality; a VSWR detection circuit that detects a traveling wave and a reflected wave from the combined output of the plurality of high-frequency power amplifiers and calculates a voltage standing wave ratio (VSWR); and the abnormality detection circuit and VSWR detection. Pulse width control for controlling the pulse width of a pulse width modulated signal input to the plurality of high frequency power amplifiers based on the output of the circuit so that the transmitter maintains a normal output or minimizes a decrease in the output. It is configured with a circuit.
次に、図面を参照して本発明を説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を構成を示すブロック図であ
る。FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
第１図に示す実施例の構成は、複数の高周波電力増幅器
として６個の高周波電力増幅器を運用してｌ０ＫＷの出
力を得る場合を例とし、送信信号のパルス幅変調を行な
うパルス幅変調器１と、ＲＦ励励振器上、高周波電力増
幅器３−１〜３−６と、高周波電力増幅器３−１〜３−
３の３出力を合成するハイブリッド３合成回路４−１と
、高周波電力増幅器３−４〜３−６の３出カを合成する
ハイブリッド３合成回路４−２と、ハイブリッド３合成
回路４−１と４−２の２出力を合成するハイブリッド２
合成回路５と、ＶＳＷＲを検出するＶＳＷＲ検出回路６
と、６個の高周波電力増幅回路３−１〜３−６のそれぞ
れにおける異常検出点からの異常監視データを入力して
異常の有無を検出し、異常の場合には異常発生を示す異
常信号を各高周波電力増幅器ごとに出力する異常検出回
路７と、ＶＳＷＲ検出回路６と異常検出回路７の出力を
受けてハイブリッド２合成回路５の出力を正規の状態に
保持するか、もしくは、出力の減少を最小限にとどめる
ように高周波電力増幅器３−１〜３−６に入力すべきパ
ルス幅変調信号入力のパルス幅を制御するパルス幅制御
信号を出力するパルス幅制御回路８を備えて成る。The configuration of the embodiment shown in FIG. 1 is based on an example in which six high-frequency power amplifiers are operated as a plurality of high-frequency power amplifiers to obtain an output of 10 KW, and a pulse width modulator 1 performs pulse width modulation of a transmission signal. , on the RF excitation exciter, high frequency power amplifiers 3-1 to 3-6, and high frequency power amplifiers 3-1 to 3-
a hybrid 3 synthesis circuit 4-1 that synthesizes the three outputs of the high frequency power amplifiers 3-4 to 3-6; a hybrid 3 synthesis circuit 4-2 that synthesizes the three outputs of the high frequency power amplifiers 3-4 to 3-6; Hybrid 2 that combines the two outputs of 4-2
A synthesis circuit 5 and a VSWR detection circuit 6 that detects VSWR
The abnormality monitoring data from the abnormality detection points in each of the six high frequency power amplification circuits 3-1 to 3-6 is input to detect the presence or absence of an abnormality, and in the case of an abnormality, an abnormality signal indicating the occurrence of an abnormality is generated. In response to the outputs of the abnormality detection circuit 7, the VSWR detection circuit 6, and the abnormality detection circuit 7 that output for each high-frequency power amplifier, the output of the hybrid 2 synthesis circuit 5 is maintained at a normal state, or the output is decreased. It comprises a pulse width control circuit 8 that outputs a pulse width control signal that controls the pulse width of the pulse width modulation signal input to the high frequency power amplifiers 3-1 to 3-6 so as to minimize it.
次に、第１図の実施例の動作について説明する。Next, the operation of the embodiment shown in FIG. 1 will be explained.
高周波電力増幅器３−１〜３−６組それぞれ２ＫＷ出力
のものを使用しており、６合成で出力１０ＫＷとしてい
る。回路の損失を無覗すると、１台あたりの実際の圧力
は１０ＫＷ／６＝ １．６７ＫＷとなる。The high-frequency power amplifiers 3-1 to 3-6 each have an output of 2 kW, and when combined, the output of 6 is 10 kW. Without looking into the circuit loss, the actual pressure per unit is 10KW/6 = 1.67KW.
異常検出回路７により各高周波電力増幅器の異常検出を
行ない、どれか１台でも故障した場合は、ＶＳＷＲ検出
回路６からのＶＳＷＲの値に応じて、電力増幅すべきパ
ルス幅変調信号入力のパルス幅を制御して出力を上げる
ようにする。The abnormality detection circuit 7 detects an abnormality in each high-frequency power amplifier, and if any one of them fails, the pulse width of the pulse width modulation signal input to be power amplified is determined according to the VSWR value from the VSWR detection circuit 6. control to increase output.
２ＫＷ出力の高周波電力増幅器３−１〜３−（がＶＳＷ
Ｒ＝２まで連続使用可能だとすると１、ＶＳＷＲ＝１の
場合は２倍の４ＫＷまで力できイので、ＶＳＷＲ＝１の
場合は下記の計算により２台故障まで、ｌ０ＫＷ出力を
維持できる。High frequency power amplifiers 3-1 to 3- (with VSW
If it can be used continuously up to R = 2, then if VSWR = 1, it can output twice as much as 4KW, so when VSWR = 1, it is possible to maintain the output of 10KW until 2 units fail, according to the calculation below.
すなわち、２台故障時の制御後の高周波電力増幅器の出
力Ｐ１は
＜４／６）２Ｘ６Ｐ１ ＝１０ＫＷがらＰｌ＝３７５Ｋ
Ｗとなる。In other words, the output P1 of the high frequency power amplifier after control when two units fail is <4/6) 2X6P1 = 10KW, but Pl = 375K
It becomes W.
このようにして、ＶＳＷＲ検出回路６の出力するＶＳＷ
Ｒ値を異常検出回路７の出力する異常信号にもとづいて
パルス幅を制御して出力の確保もしくは最大許容限度を
超えない出力低下抑制を行なうことができる。In this way, the VSW output from the VSWR detection circuit 6
By controlling the pulse width of the R value based on the abnormality signal output by the abnormality detection circuit 7, it is possible to secure the output or suppress the output from decreasing so as not to exceed the maximum allowable limit.
以上説明したように本発明は、パルス幅変調方式による
合成出力を送出する複数の高周波電力増幅器が故障して
も高周波電力増幅器の異常情報とＶＳＷＲ値にもとづい
てパルス幅を制御することにより、残りの正常な高周波
電力増幅器の出力をその能力の許す範囲内で上げること
により、正規の出力を維持するか、もしくは出方の減少
を最小限にとどめることができるという効果がある。As explained above, the present invention enables even if a plurality of high-frequency power amplifiers that send out a combined output using a pulse-width modulation method fail, the pulse width is controlled based on the abnormality information and VSWR value of the high-frequency power amplifiers. By increasing the output of a normal high frequency power amplifier within the range allowed by its ability, the effect is that the normal output can be maintained or the decrease in output can be kept to a minimum.
第１図は本発明の一実施例の構成を示すブロック図であ
る。
１・・パルス幅変調器、２・・・ＲＦ励振器、３−１〜
３−６・・・高周波電力増幅器、４−１・・・４−２・
・・ハイブリッド３合成回路、５・・・ハイブリッド２
合成回路、６・・、ＶＳＷＲ検出回路、７・・・異常検
出回路、８・・・パルス幅制御回路。FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. 1...Pulse width modulator, 2...RF exciter, 3-1~
3-6...High frequency power amplifier, 4-1...4-2.
...Hybrid 3 synthesis circuit, 5...Hybrid 2
Synthesis circuit, 6..., VSWR detection circuit, 7... Abnormality detection circuit, 8... Pulse width control circuit.
Claims (1)
ブリッド合成して高出力を得る送信機における前記複数
の高周波電力増幅器のそれぞれの異常を検出する異常検
出回路と、前記複数の高周波電力増幅器の合成出力から
進行波と反射波を検出し電圧定在波比（ＶＳＷＲ）を演
算するＶＳＷＲ検出回路と、前記異常検出回路とＶＳＷ
Ｒ検出回路の出力にもとづいて前記複数の高周波電力増
幅器に供給するパルス幅変調信号入力のパルス幅を前記
送信機が正規の出力を維持するかもしくは出力減少を最
小限にとどめるように制御するパルス幅制御回路とを備
えて成ることを特徴とする高周波電力出力制御方法。an abnormality detection circuit for detecting an abnormality in each of the plurality of high-frequency power amplifiers in a transmitter that hybrid-synthesizes high-frequency power amplifiers using a plurality of pulse width modulation methods to obtain high output; and a combined output of the plurality of high-frequency power amplifiers. a VSWR detection circuit that detects a traveling wave and a reflected wave and calculates a voltage standing wave ratio (VSWR); the abnormality detection circuit; and a VSW.
A pulse for controlling the pulse width of a pulse width modulated signal input to the plurality of high frequency power amplifiers based on the output of the R detection circuit so that the transmitter maintains a normal output or minimizes a decrease in output. 1. A high frequency power output control method, comprising: a width control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7802190A JPH03277006A (en) | 1990-03-27 | 1990-03-27 | High frequency power output control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7802190A JPH03277006A (en) | 1990-03-27 | 1990-03-27 | High frequency power output control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03277006A true JPH03277006A (en) | 1991-12-09 |
Family
ID=13650151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7802190A Pending JPH03277006A (en) | 1990-03-27 | 1990-03-27 | High frequency power output control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03277006A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586589A (en) * | 2018-11-19 | 2019-04-05 | 许继集团有限公司 | A kind of MMC, submodule put into a number calculating method, investment method and device |
-
1990
- 1990-03-27 JP JP7802190A patent/JPH03277006A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586589A (en) * | 2018-11-19 | 2019-04-05 | 许继集团有限公司 | A kind of MMC, submodule put into a number calculating method, investment method and device |
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