JPH0321999U - - Google Patents
Info
- Publication number
- JPH0321999U JPH0321999U JP1989082814U JP8281489U JPH0321999U JP H0321999 U JPH0321999 U JP H0321999U JP 1989082814 U JP1989082814 U JP 1989082814U JP 8281489 U JP8281489 U JP 8281489U JP H0321999 U JPH0321999 U JP H0321999U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- base
- resistors
- circuit
- transistors
- 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 6
- 238000001816 cooling Methods 0.000 claims description 3
- 230000006866 deterioration Effects 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Direct Current Motors (AREA)
Description
第１図は本考案に係る冷却フアン機能低下検出
回路の一実施例を示す回路図、第２図はその動作
範囲を示す説明図である。第３図、第４図、第５
図はそれぞれ本考案の他の実施例を示す回路図で
ある。
１０……ＤＣフアン、１２……ＡＣフアン、１
４……整流回路、Ｒ１，Ｒ２……電流検出抵抗、
Ｒ３，Ｒ４……ベース抵抗、Ｑ１，Ｑ２……トラ
ンジスタ。
FIG. 1 is a circuit diagram showing an embodiment of a cooling fan function deterioration detection circuit according to the present invention, and FIG. 2 is an explanatory diagram showing its operating range. Figure 3, Figure 4, Figure 5
The figures are circuit diagrams showing other embodiments of the present invention. 10...DC fan, 12...AC fan, 1
4... Rectifier circuit, R1 , R2 ... Current detection resistor,
R3 , R4 ...Base resistance, Q1 , Q2 ...Transistor.
Claims (1)
電流検出抵抗の直列接続回路と、第１及び第２の
トランジスタで両エミツタを共通化し第１のトラ
ンジスタのコレクタを第２のトランジスタのベー
スに接続するよう組み合わせたトランジスタ複合
接続回路と、一端をそれぞれ両トランジスタのベ
ースに接続し他端をそれぞれ両電流検出抵抗に結
合した２個のベース抵抗を具備し、第２のトラン
ジスタのコレクタから検出信号を得るようにした
冷却フアンの機能低下検出回路。 A series connection circuit of first and second current detection resistors provided in the cooling fan drive circuit, and a common emitter of the first and second transistors, with the collector of the first transistor being the base of the second transistor. A transistor composite connection circuit combined to connect the two base resistors, each having one end connected to the base of both transistors and the other end connected to both current detection resistors, respectively, receives a detection signal from the collector of the second transistor. A cooling fan function deterioration detection circuit that achieves this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989082814U JPH0729757Y2 (en) | 1989-07-14 | 1989-07-14 | Cooling fan function deterioration detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989082814U JPH0729757Y2 (en) | 1989-07-14 | 1989-07-14 | Cooling fan function deterioration detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0321999U true JPH0321999U (en) | 1991-03-06 |
| JPH0729757Y2 JPH0729757Y2 (en) | 1995-07-05 |
Family
ID=31629955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989082814U Expired - Fee Related JPH0729757Y2 (en) | 1989-07-14 | 1989-07-14 | Cooling fan function deterioration detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0729757Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212437U (en) * | 1975-07-14 | 1977-01-28 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212437B2 (en) * | 1971-10-15 | 1977-04-07 |
-
1989
- 1989-07-14 JP JP1989082814U patent/JPH0729757Y2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212437U (en) * | 1975-07-14 | 1977-01-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0729757Y2 (en) | 1995-07-05 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |