JPS62111739U - - Google Patents
Info
- Publication number
- JPS62111739U JPS62111739U JP20474285U JP20474285U JPS62111739U JP S62111739 U JPS62111739 U JP S62111739U JP 20474285 U JP20474285 U JP 20474285U JP 20474285 U JP20474285 U JP 20474285U JP S62111739 U JPS62111739 U JP S62111739U
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- power tool
- transistor
- value
- converter
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は実施例のブロツク線図、第２図は従来
例ブロツク線図である。
……インバータ電源、３……順変換器、４…
…逆変換器、６……コンデンサ、９……零相電流
検出器、１０……比較器、……グラインダ本体
。
FIG. 1 is a block diagram of the embodiment, and FIG. 2 is a block diagram of a conventional example. ...Inverter power supply, 3...Forward converter, 4...
... Inverse converter, 6 ... Capacitor, 9 ... Zero-phase current detector, 10 ... Comparator, ... Grinder main body.
Claims (1)
回路の逆変換器、を主回路構成要素とするインバ
ータ電源を駆動源とする電動工具において、イン
バータ電源入力側に零相電流検出器を挿入すると
ともに、その検出値が予じめ定めた基準値以上の
ときに逆変換器トランジスタのベースカツト信号
を供出するようにしたことを特徴とするインバー
タ駆動電動工具の地絡保護装置。 In a power tool whose driving source is an inverter power supply whose main circuit components include a forward converter, a capacitor, and an inverse converter of a transistor bridge circuit, a zero-phase current detector is inserted into the inverter power input side, and its detection A ground fault protection device for an inverter-driven power tool, characterized in that a base cut signal of an inverter transistor is provided when the value is equal to or higher than a predetermined reference value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20474285U JPS62111739U (en) | 1985-12-27 | 1985-12-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20474285U JPS62111739U (en) | 1985-12-27 | 1985-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62111739U true JPS62111739U (en) | 1987-07-16 |
Family
ID=31170736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20474285U Pending JPS62111739U (en) | 1985-12-27 | 1985-12-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62111739U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60139128A (en) * | 1983-12-27 | 1985-07-23 | 株式会社東芝 | Ground protecting device for power converter |
-
1985
- 1985-12-27 JP JP20474285U patent/JPS62111739U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60139128A (en) * | 1983-12-27 | 1985-07-23 | 株式会社東芝 | Ground protecting device for power converter |
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