JPH01101175U - - Google Patents
Info
- Publication number
- JPH01101175U JPH01101175U JP19715487U JP19715487U JPH01101175U JP H01101175 U JPH01101175 U JP H01101175U JP 19715487 U JP19715487 U JP 19715487U JP 19715487 U JP19715487 U JP 19715487U JP H01101175 U JPH01101175 U JP H01101175U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- output
- signal
- conversion circuit
- equation
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims 4
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Description
第１図はこの考案の一実施例の構成を示すブロ
ツク図、第２図はその各部の波形図、第３図はこ
の考案の他の実施例のハードウエア構成を示すブ
ロツク図、第４図は同じくソフトウエア構成を示
すフローチヤート、第５図は従来例の構成を示す
ブロツク図、第６図は第５図の各部の波形図であ
る。
１……３相／２相変換回路、２……逆正接演算
回路、３……信号変換回路、４……係数行列構成
要素演算回路。
Figure 1 is a block diagram showing the configuration of one embodiment of this invention, Figure 2 is a waveform diagram of each part thereof, Figure 3 is a block diagram showing the hardware configuration of another embodiment of this invention, and Figure 4. 5 is a flowchart showing the software configuration, FIG. 5 is a block diagram showing the configuration of a conventional example, and FIG. 6 is a waveform diagram of each part of FIG. 1... 3-phase/2-phase conversion circuit, 2... Arctangent calculation circuit, 3... Signal conversion circuit, 4... Coefficient matrix component calculation circuit.
Claims (1)
から出力されて(1)，(2)，(3)式で表される各相
の検出電圧ＶＵ，ＶＶ，ＶＷを構成要素とするベ
クトル に対し、(4)式で示す行列演算を行うことにより
、ベクトル の構成要素の２相の出力電圧ＶＡ，ＶＢを発生す
る３相／２相変換回路と、この３相／２相変換回
路の２相の出力電圧ＶＡ，ＶＢから（１２）式に
従つて前記検出電圧ＶＵの位相θと出力位相θ１
との位相差Δθを求める逆正接演算回路と、前記
位相差Δθを零に近づけるための所定の伝達関数
を有し前記逆正接演算回路から出力される位相差
Δθを出力位相θ１の情報をもつ位相信号に変換
する信号変換回路と、この信号変換回路の位相信
号に応じて係数行列Ｃの構成要素ｔ１１，ｔ１２
，ｔ１３，ｔ２１，ｔ２２，ｔ２３を(6)〜（１
１）式に従つて求め前記３相／２相変換回路へ与
える係数行列構成要素演算回路とを備えた同期信
号検出装置。 ＶＵ＝Ｖｓｉｎθ …………(1) ＶＶ＝Ｖｓｉｎ（θ―２π／３） …………(2) ＶＷ＝Ｖｓｉｎ（θ―４π／３） …………(3) ただし、Ｖは電圧振幅、θは検出電圧ＶＵの位
相である。 だだし、係数行列Ｃは(5)式で表される。 また、係数行列Ｃの構成要素ｔ１１，ｔ１２，
ｔ１３，ｔ２１，ｔ２２，ｔ２３はそれぞれ(6)
〜〓(11)１１〓式で表される。 ｔ１１＝ｃｏｓθ１ …………(6) ｔ１２＝ｃｏｓ（θ１−２π／３） ……
……(7) ｔ１３＝ｃｏｓ（θ１−４π／３） ……
……(8) ｔ２１＝ｓｉｎθ１ …………(9) ｔ２２＝ｓｉｎ（θ１−２π／３） ………
…(10) ｔ２３＝ｓｉｎ（θ１−４π／３）…………〓
(11)１１〓 Δθ＝ｔａｎ−１（ＶＡ／ＶＢ）…………〓(1
2)１２〓[Scope of claim for utility model registration] Detected voltages VU and VV of each phase output from a detection circuit that detects each phase voltage of a three-phase power system and expressed by equations (1), (2), and (3) , VW as components, by performing the matrix operation shown in equation (4), a three-phase/two-phase conversion circuit generates two-phase output voltages VA and VB of the vector components, and this From the two-phase output voltages VA and VB of the three-phase/two-phase conversion circuit, the phase θ of the detection voltage VU and the output phase θ 1 are determined according to equation (12).
an arctangent calculation circuit that calculates the phase difference Δθ between the arctangent calculation circuit and a predetermined transfer function for bringing the phase difference Δθ close to zero, and outputs the phase difference Δθ output from the arctangent calculation circuit with information on the output phase θ 1 . a signal conversion circuit that converts the phase signal into a phase signal, and components t 11 and t 12 of the coefficient matrix C according to the phase signal of this signal conversion circuit
, t 13 , t 21 , t 22 , t 23 from (6) to (1
1) A synchronous signal detection device comprising: a coefficient matrix component calculation circuit which calculates the coefficients according to the equation and supplies them to the three-phase/two-phase conversion circuit. VU=Vsinθ …………(1) VV=Vsin(θ-2π/3) …………(2) VW=Vsin(θ-4π/3) …………(3) However, V is the voltage amplitude , θ is the phase of the detection voltage VU. However, the coefficient matrix C is expressed by equation (5). Also, the components t 11 , t 12 ,
t 13 , t 21 , t 22 , t 23 are each (6)
〜〓(11)１１〓It is expressed by the formula. t 11 = cos θ 1 ……(6) t 12 = cos(θ 1 −2π/3) ……
...(7) t 13 = cos(θ 1 -4π/3) ...
……(8) t 21 = sin θ 1 ……(9) t 22 = sin(θ 1 −2π/3) ……
…(10) t 23 = sin(θ 1 −4π/3)…………〓
(11)１１〓 Δθ＝tan −1 (VA/VB)…………〓(1
2)12〓
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987197154U JPH0644307Y2 (en) | 1987-12-24 | 1987-12-24 | Sync signal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987197154U JPH0644307Y2 (en) | 1987-12-24 | 1987-12-24 | Sync signal detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01101175U true JPH01101175U (en) | 1989-07-07 |
| JPH0644307Y2 JPH0644307Y2 (en) | 1994-11-14 |
Family
ID=31487724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987197154U Expired - Lifetime JPH0644307Y2 (en) | 1987-12-24 | 1987-12-24 | Sync signal detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0644307Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5646660A (en) * | 1979-09-25 | 1981-04-27 | Toshiba Corp | Circuit for detecting synchronizing signal |
-
1987
- 1987-12-24 JP JP1987197154U patent/JPH0644307Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5646660A (en) * | 1979-09-25 | 1981-04-27 | Toshiba Corp | Circuit for detecting synchronizing signal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0644307Y2 (en) | 1994-11-14 |
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