JPS5878739U - Overspeed protection device - Google Patents
Overspeed protection deviceInfo
- Publication number
- JPS5878739U JPS5878739U JP17307681U JP17307681U JPS5878739U JP S5878739 U JPS5878739 U JP S5878739U JP 17307681 U JP17307681 U JP 17307681U JP 17307681 U JP17307681 U JP 17307681U JP S5878739 U JPS5878739 U JP S5878739U
- Authority
- JP
- Japan
- Prior art keywords
- motor
- rotation speed
- circuit
- control element
- semiconductor control
- 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
Landscapes
- Protection Of Generators And Motors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案の一実施例を示す回路図である。
図において、１は交流電源、３はヒユーズ、４は電動機
、５は半導体制御素子、６は半導体制御素子、７は回転
センサ、８は信号変換回路、９は動作回転数設定回路、
１０は比較回路、１２は信号伝達回路、１３は位相制御
面路、１４は回転数制御装置である。FIG. 1 is a circuit diagram showing an embodiment of the present invention. In the figure, 1 is an AC power supply, 3 is a fuse, 4 is an electric motor, 5 is a semiconductor control element, 6 is a semiconductor control element, 7 is a rotation sensor, 8 is a signal conversion circuit, 9 is an operating rotation speed setting circuit,
10 is a comparison circuit, 12 is a signal transmission circuit, 13 is a phase control plane, and 14 is a rotation speed control device.
Claims (1)
回転数を制御する半導体制御素子５の直列回路、前記電
動機４と前記半導体制御素子５の直列回路に並列に接続
され、電動機４の回転数を抑制する回転数制御回路１４
の故障あるいは半導体制御素子５の短絡により電動機４
が過剰回転数になった時導通し、ヒユーズ３を溶断させ
、電動機４への給電を停止させる半導体制御素子６、該
半導体制御素子６が導通時、素子に流れる電流を抑制す
るため導通角を小さくする位相制御回路、電動機４の過
剰回転数発生を感知し、前記位相制御回路を動作させる
比較回路１０に構成される回転数制御装置を備えた携帯
用電動工具の過剰回転数保護装置。A fuse 3 is connected in series to the AC power supply 1, a series circuit of a motor 4 and a semiconductor control element 5 that controls the rotation speed, and a series circuit of the motor 4 and the semiconductor control element 5 that is connected in parallel to the series circuit of the motor 4 and the semiconductor control element 5 to control the rotation of the motor 4. Rotation speed control circuit 14 that suppresses the number of revolutions
Due to a failure in the motor 4 or a short circuit in the semiconductor control element 5, the motor 4
A semiconductor control element 6 conducts when the motor reaches an excessive rotation speed, blows out the fuse 3, and stops power supply to the motor 4. When the semiconductor control element 6 conducts, the conduction angle is adjusted to suppress the current flowing through the element. An excessive rotation speed protection device for a portable power tool, comprising a rotation speed control device constituted by a phase control circuit that reduces the number of rotations, and a comparison circuit 10 that senses the generation of excessive rotation speed of an electric motor 4 and operates the phase control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17307681U JPS5878739U (en) | 1981-11-19 | 1981-11-19 | Overspeed protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17307681U JPS5878739U (en) | 1981-11-19 | 1981-11-19 | Overspeed protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5878739U true JPS5878739U (en) | 1983-05-27 |
Family
ID=29964945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17307681U Pending JPS5878739U (en) | 1981-11-19 | 1981-11-19 | Overspeed protection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5878739U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4949429B2 (en) * | 1972-06-03 | 1974-12-27 | ||
| JPS5540644B2 (en) * | 1976-12-01 | 1980-10-20 |
-
1981
- 1981-11-19 JP JP17307681U patent/JPS5878739U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4949429B2 (en) * | 1972-06-03 | 1974-12-27 | ||
| JPS5540644B2 (en) * | 1976-12-01 | 1980-10-20 |
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