JPH01131241U - - Google Patents
Info
- Publication number
- JPH01131241U JPH01131241U JP2574588U JP2574588U JPH01131241U JP H01131241 U JPH01131241 U JP H01131241U JP 2574588 U JP2574588 U JP 2574588U JP 2574588 U JP2574588 U JP 2574588U JP H01131241 U JPH01131241 U JP H01131241U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- current
- signal
- wave signal
- sine wave
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来の補償電流検出回路図である。
４１……３相／２相変換回路、４２……同期検
出回路、４３……同期電圧波形発生回路、５０…
…３相／２相変換回路。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a diagram of a conventional compensation current detection circuit. 41... 3-phase/2-phase conversion circuit, 42... synchronous detection circuit, 43... synchronous voltage waveform generation circuit, 50...
...3-phase/2-phase conversion circuit.
Claims (1)
相／２相変換手段と、電源電圧に同期した正弦波
信号と余弦波信号を得る同期電圧波形発生手段と
、前記２相電流と正弦波信号及び余弦波信号から
基本波の瞬時有効電流信号を得る瞬時有効電流演
算手段と、前記瞬時有効電流信号に前記正弦波信
号及び余弦波信号を乗算して３相の瞬時有効電流
信号を得る演算手段とを備え、前記３相の瞬時有
効電流と前記負荷電流との偏差を補償電流検出信
号とすることを特徴とする電力補償装置の補償電
流検出回路。 Converting 3-phase load current to orthogonal 2-phase current 3
a phase/two-phase conversion means, a synchronous voltage waveform generation means for obtaining a sine wave signal and a cosine wave signal synchronized with the power supply voltage, and a fundamental wave instantaneous effective current signal from the two-phase current, the sine wave signal, and the cosine wave signal. and calculating means for multiplying the instantaneous effective current signal by the sine wave signal and the cosine wave signal to obtain a three-phase instantaneous effective current signal, A compensation current detection circuit for a power compensation device, characterized in that a deviation from a load current is used as a compensation current detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2574588U JPH073803Y2 (en) | 1988-02-26 | 1988-02-26 | Compensation current detection circuit for power compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2574588U JPH073803Y2 (en) | 1988-02-26 | 1988-02-26 | Compensation current detection circuit for power compensator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01131241U true JPH01131241U (en) | 1989-09-06 |
| JPH073803Y2 JPH073803Y2 (en) | 1995-01-30 |
Family
ID=31246749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2574588U Expired - Lifetime JPH073803Y2 (en) | 1988-02-26 | 1988-02-26 | Compensation current detection circuit for power compensator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073803Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04367011A (en) * | 1991-06-14 | 1992-12-18 | Hitachi Ltd | Method and device for power conversion |
-
1988
- 1988-02-26 JP JP2574588U patent/JPH073803Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04367011A (en) * | 1991-06-14 | 1992-12-18 | Hitachi Ltd | Method and device for power conversion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH073803Y2 (en) | 1995-01-30 |
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