JPS6454790U - - Google Patents
Info
- Publication number
- JPS6454790U JPS6454790U JP1987146412U JP14641287U JPS6454790U JP S6454790 U JPS6454790 U JP S6454790U JP 1987146412 U JP1987146412 U JP 1987146412U JP 14641287 U JP14641287 U JP 14641287U JP S6454790 U JPS6454790 U JP S6454790U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- conversion circuit
- rectifier
- rectifier circuit
- positive terminal
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
- Power Conversion In General (AREA)
Description
第1図は本考案の一実施例の回路図、第2図a
及びbは直流―交流変換回路の出力線に地絡が発
生した場合に2つのトランジスタに流れる電流の
波形図、第3図は従来のインバータ回路の回路図
、第4図a,b及びcはその各部の電流の波形図
、第5図は、地絡が発生したときその2つのトラ
ンジスタに流れる電流の波形図である。
1…3相全波整流回路、2…交流電源、3…ホ
ール素子、4…直流―交流変換回路、6…平滑用
インダクタンス、71〜74…トランジスタ、8
…制御部、91,92…出力端子。
Figure 1 is a circuit diagram of an embodiment of the present invention, Figure 2a
and b are waveform diagrams of the current flowing through the two transistors when a ground fault occurs in the output line of the DC-AC conversion circuit, Figure 3 is a circuit diagram of a conventional inverter circuit, and Figures 4 a, b, and c are FIG. 5 is a waveform diagram of the current flowing through the two transistors when a ground fault occurs. DESCRIPTION OF SYMBOLS 1... Three-phase full-wave rectifier circuit, 2... AC power supply, 3... Hall element, 4... DC-AC conversion circuit, 6... Smoothing inductance, 7 1 to 7 4 ... Transistor, 8
...control unit, 9 1 , 9 2 ...output terminals.
Claims (1)
の正極端子及び負極端子に接続されたチヨツピン
グ素子から成る直流―交流変換回路と、該変換回
路の交流出力電流を所定値に制御する制御部とか
ら成るインバータ回路において、前記整流回路の
正極端子及び負極端子と前記直流―交流変換回路
との接続回路の一方に電流制限用インダクタンス
を、他方に前記制御部用の電流検出素子をそれぞ
れ接続したことを特徴とするインバータ回路の地
絡防護回路。 A rectifier circuit connected to an AC power supply, a DC-AC conversion circuit comprising a chopping element connected to a positive terminal and a negative terminal of the rectifier circuit, and a control unit that controls an AC output current of the conversion circuit to a predetermined value. In the inverter circuit consisting of, a current limiting inductance is connected to one side of a connection circuit between the positive terminal and negative terminal of the rectifier circuit and the DC-AC conversion circuit, and a current detection element for the control section is connected to the other side. A ground fault protection circuit for an inverter circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987146412U JPS6454790U (en) | 1987-09-28 | 1987-09-28 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987146412U JPS6454790U (en) | 1987-09-28 | 1987-09-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6454790U true JPS6454790U (en) | 1989-04-04 |
Family
ID=31415877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987146412U Pending JPS6454790U (en) | 1987-09-28 | 1987-09-28 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6454790U (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60137582A (en) * | 1983-12-24 | 1985-07-22 | Honda Motor Co Ltd | Constant current control circuit of resistance welding machine |
JPS617980A (en) * | 1984-06-22 | 1986-01-14 | Hitachi Medical Corp | Data processor |
-
1987
- 1987-09-28 JP JP1987146412U patent/JPS6454790U/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60137582A (en) * | 1983-12-24 | 1985-07-22 | Honda Motor Co Ltd | Constant current control circuit of resistance welding machine |
JPS617980A (en) * | 1984-06-22 | 1986-01-14 | Hitachi Medical Corp | Data processor |
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