JPS63127282U - - Google Patents
Info
- Publication number
- JPS63127282U JPS63127282U JP1848287U JP1848287U JPS63127282U JP S63127282 U JPS63127282 U JP S63127282U JP 1848287 U JP1848287 U JP 1848287U JP 1848287 U JP1848287 U JP 1848287U JP S63127282 U JPS63127282 U JP S63127282U
- Authority
- JP
- Japan
- Prior art keywords
- freewheeling diode
- smoothing reactor
- inverter
- smoothing
- freewheeling
- 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
- 238000009499 grossing Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Rectifiers (AREA)
- Power Conversion In General (AREA)
Description
第１図ないし第５図は本考案の実施例を示し、
第１図はインバータの全体概略構成を示す電気回
路図、第２図は還流阻止手段の変形例を示す電気
回路図、第３図はないし第５図は各々逆並列回路
の主要部とその後段に流れる電流波形及び電圧波
形を示す図である。第６図は従来例を示す平滑リ
アクトルの電流波形及び電解コンデンサの電圧波
形を示す図である。
Ａ……インバータ、１……商用電源、２……整
流部、４……平滑部、Ｌ……平滑リアクトル、Ｃ
……電解コンデンサ、５……周波数変換部、ＦＤ
……還流ダイオード、ＴＨ……サイリスタ、６，
６′……逆並列回路、７，７′……還流阻止手段
。
1 to 5 show embodiments of the present invention,
Fig. 1 is an electric circuit diagram showing the overall schematic configuration of the inverter, Fig. 2 is an electric circuit diagram showing a modification of the reflux prevention means, and Figs. 3 to 5 are the main parts of the anti-parallel circuit and the subsequent stages, respectively FIG. 3 is a diagram showing current waveforms and voltage waveforms flowing through the circuit. FIG. 6 is a diagram showing a current waveform of a smoothing reactor and a voltage waveform of an electrolytic capacitor showing a conventional example. A... Inverter, 1... Commercial power supply, 2... Rectifying section, 4... Smoothing section, L... Smoothing reactor, C
... Electrolytic capacitor, 5 ... Frequency conversion section, FD
...freewheeling diode, TH...thyristor, 6,
6'... Anti-parallel circuit, 7, 7'... Reflux prevention means.
Claims (1)
介して周波数変換部５に入力するインバータＡに
おいて、上記平滑リアクトルＬには、還流ダイオ
ードＦＤが逆並列に接続されるとともに、電源投
入後、上記還流ダイオードＦＤに流れる電流値が
零値になるまでの所定時間の経過後は上記平滑リ
アクトルＬと還流ダイオードＦＤとの逆並列回路
６を開路する還流阻止手段７を備えたことを特徴
とするインバータの保護装置。 In the inverter A that inputs DC to the frequency conversion unit 5 via the smoothing unit 4 provided with the smoothing reactor L, a freewheeling diode FD is connected in antiparallel to the smoothing reactor L, and after the power is turned on, the above-mentioned An inverter comprising a freewheeling blocking means 7 that opens the anti-parallel circuit 6 of the smoothing reactor L and the freewheeling diode FD after a predetermined time has elapsed until the value of the current flowing through the freewheeling diode FD reaches zero. protection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1848287U JPS63127282U (en) | 1987-02-09 | 1987-02-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1848287U JPS63127282U (en) | 1987-02-09 | 1987-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63127282U true JPS63127282U (en) | 1988-08-19 |
Family
ID=30812193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1848287U Pending JPS63127282U (en) | 1987-02-09 | 1987-02-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63127282U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0270269A (en) * | 1988-09-05 | 1990-03-09 | Sanyo Denki Co Ltd | Rectifier |
| JPH0442779A (en) * | 1990-06-05 | 1992-02-13 | Sanken Electric Co Ltd | Power unit |
-
1987
- 1987-02-09 JP JP1848287U patent/JPS63127282U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0270269A (en) * | 1988-09-05 | 1990-03-09 | Sanyo Denki Co Ltd | Rectifier |
| JPH0442779A (en) * | 1990-06-05 | 1992-02-13 | Sanken Electric Co Ltd | Power unit |
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