JPS63119211U - - Google Patents
Info
- Publication number
- JPS63119211U JPS63119211U JP1127187U JP1127187U JPS63119211U JP S63119211 U JPS63119211 U JP S63119211U JP 1127187 U JP1127187 U JP 1127187U JP 1127187 U JP1127187 U JP 1127187U JP S63119211 U JPS63119211 U JP S63119211U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- power supply
- turned
- solenoid
- low voltage
- 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
- 238000001514 detection method Methods 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Protection Of Static Devices (AREA)
Description
第１図はこの考案の一実施例を適用したソレノ
イド駆動回路の要部を示す図、第２図は従来のソ
レノイド駆動回路の一例を示す図、第３図はこの
従来の駆動回路でソレノイドに印加される電圧の
変化を示す図である。
１２……駆動信号、１４……コンパレータ、１
５〜１７……トランジスタ、１８……高電圧電源
、１９……ソレノイド、２０……電流検知用抵抗
、２２……基準電圧設定用電源、２３……低電圧
電源、２４〜２６……ダイオード、３１……単安
定マルチバイブレータ、３２……フリツプフロツ
プ、３３……アンド回路、３４……ナンド回路、
３５，３６……異常電流検知用抵抗、３７〜４０
……トランジスタ。
Fig. 1 is a diagram showing the main parts of a solenoid drive circuit to which an embodiment of this invention is applied, Fig. 2 is a diagram showing an example of a conventional solenoid drive circuit, and Fig. 3 is a diagram showing a solenoid drive circuit using this conventional drive circuit. FIG. 3 is a diagram showing changes in applied voltage. 12... Drive signal, 14... Comparator, 1
5 to 17... Transistor, 18... High voltage power supply, 19... Solenoid, 20... Current detection resistor, 22... Reference voltage setting power supply, 23... Low voltage power supply, 24 to 26... Diode, 31... Monostable multivibrator, 32... Flip-flop, 33... AND circuit, 34... NAND circuit,
35, 36... Resistor for abnormal current detection, 37-40
...transistor.
Claims (1)
１のトランジスタを介して高電圧をソレノイドに
印加し、ソレノイドのコイルに流れる電流が所定
値に達したら、これを電流検知手段で検知して第
１のトランジスタをオフにし、低電圧電源からオ
ンとなつている第２のトランジスタを介して駆動
保持用低電圧をソレノイドに印加するようにした
ソレノイド駆動回路において、高電圧電源と第１
のトランジスタの間に設けられ、過大な電流が流
れるときこれを検知する第１の異常電流検知手段
と、低電圧電源と第２のトランジスタの間に設け
られ、過大な電流が流れるときこれを検知する第
２の異常電流検知手段と、第１または第２の異常
電流検知手段から過大電流検知信号の供給を受け
たとき第１および第２のトランジスタをオフにす
るトランジスタ制御手段とを具備することを特徴
とするソレノイド駆動回路の保護装置。 At the beginning of operation, a high voltage is applied to the solenoid via the first transistor which is turned on from the high voltage power supply, and when the current flowing through the coil of the solenoid reaches a predetermined value, this is detected by the current detection means and the first transistor is turned on. In a solenoid drive circuit, a low voltage for driving and holding is applied to a solenoid through a second transistor that is turned on from a low voltage power supply while the first transistor is turned off.
a first abnormal current detection means provided between the low voltage power supply and the second transistor to detect when an excessive current flows; and a first abnormal current detection means provided between the low voltage power supply and the second transistor to detect when an excessive current flows. and transistor control means for turning off the first and second transistors when receiving an overcurrent detection signal from the first or second abnormal current detection means. A solenoid drive circuit protection device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1127187U JPS63119211U (en) | 1987-01-28 | 1987-01-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1127187U JPS63119211U (en) | 1987-01-28 | 1987-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63119211U true JPS63119211U (en) | 1988-08-02 |
Family
ID=30798333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1127187U Pending JPS63119211U (en) | 1987-01-28 | 1987-01-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63119211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020051467A (en) * | 2000-12-22 | 2002-06-29 | 밍 루 | Solenoid driving apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5945208A (en) * | 1982-08-30 | 1984-03-14 | フオ−ド・モ−タ−・カンパニ− | Wheel suspension system with eccentric shearing disk |
| JPS61141130A (en) * | 1984-12-13 | 1986-06-28 | Nippon Precision Saakitsutsu Kk | Manufacture of semiconductor device |
-
1987
- 1987-01-28 JP JP1127187U patent/JPS63119211U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5945208A (en) * | 1982-08-30 | 1984-03-14 | フオ−ド・モ−タ−・カンパニ− | Wheel suspension system with eccentric shearing disk |
| JPS61141130A (en) * | 1984-12-13 | 1986-06-28 | Nippon Precision Saakitsutsu Kk | Manufacture of semiconductor device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020051467A (en) * | 2000-12-22 | 2002-06-29 | 밍 루 | Solenoid driving apparatus |
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