JPH0339384U - - Google Patents
Info
- Publication number
- JPH0339384U JPH0339384U JP9854589U JP9854589U JPH0339384U JP H0339384 U JPH0339384 U JP H0339384U JP 9854589 U JP9854589 U JP 9854589U JP 9854589 U JP9854589 U JP 9854589U JP H0339384 U JPH0339384 U JP H0339384U
- Authority
- JP
- Japan
- Prior art keywords
- output voltage
- inverter output
- photocoupler
- detects
- detection circuit
- 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
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Measurement Of Current Or Voltage (AREA)
Description
第１図は本考案の実施例を示す回路図、第２図
は上記実施例の動作を説明するための波形図、第
３図は従来の検出回路を示す回路図、第４図は上
記従来例の動作を説明するための波形図である。
２０，３０……フオトカプラー、２１，３１…
…発光ダイオード、２２，３２……フオトトラン
ジスタ、４０……波形整形回路、ＩＮＶ……イン
バータ、Ｕ，Ｖ，Ｗ……出力点、ＴＲ……トラン
ジスタ、Ｄ……ダイオード。
Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a waveform diagram for explaining the operation of the above embodiment, Fig. 3 is a circuit diagram showing a conventional detection circuit, and Fig. 4 is a circuit diagram showing the conventional detection circuit. FIG. 3 is a waveform diagram for explaining the operation of an example. 20,30...Photocoupler, 21,31...
...Light emitting diode, 22, 32...Phototransistor, 40...Waveform shaping circuit, INV...Inverter, U, V, W...Output point, TR...Transistor, D...Diode.
Claims (1)
スイツチング素子にそれぞれ並列接続された第１
のフオトカプラーと第２のフオトカプラー、およ
び第１のフオトカプラーのオン動作もしくはオフ
動作のタイミングで対応する相のインバータ出力
電圧のレベル変化検出し、第２のフオトカプラー
の上記第１のフオトカプラーと同じ動作のタイミ
ングで該インバータ出力電圧の上記とは逆方向へ
のレベル変化検出する波形整形回路とを有するこ
とを特徴とするインバータの出力電圧検出回路。 The first switching element is connected in parallel to the positive arm and negative arm switching elements of each phase of the inverter.
detects a level change in the inverter output voltage of the corresponding phase at the timing of ON or OFF operation of the first photocoupler and the first photocoupler of the second photocoupler. An inverter output voltage detection circuit comprising: a waveform shaping circuit that detects a level change in the inverter output voltage in a direction opposite to that described above at the same operation timing as the inverter output voltage detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9854589U JP2513509Y2 (en) | 1989-08-25 | 1989-08-25 | Inverter output voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9854589U JP2513509Y2 (en) | 1989-08-25 | 1989-08-25 | Inverter output voltage detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0339384U true JPH0339384U (en) | 1991-04-16 |
| JP2513509Y2 JP2513509Y2 (en) | 1996-10-09 |
Family
ID=31647639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9854589U Expired - Lifetime JP2513509Y2 (en) | 1989-08-25 | 1989-08-25 | Inverter output voltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2513509Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0740457U (en) * | 1993-12-22 | 1995-07-18 | 株式会社織部 | Container lid |
-
1989
- 1989-08-25 JP JP9854589U patent/JP2513509Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0740457U (en) * | 1993-12-22 | 1995-07-18 | 株式会社織部 | Container lid |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2513509Y2 (en) | 1996-10-09 |