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
Application number
JP1989082814U
Other languages
English (en)
Other versions
JPH0729757Y2 (ja
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1989082814U priority Critical patent/JPH0729757Y2/ja
Publication of JPH0321999U publication Critical patent/JPH0321999U/ja
Application granted granted Critical
Publication of JPH0729757Y2 publication Critical patent/JPH0729757Y2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Air Blowers (AREA)
  • Control Of Direct Current Motors (AREA)

Description

【図面の簡単な説明】
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。

Claims (1)

    【実用新案登録請求の範囲】
  1. 冷却フアンの駆動回路に設けた第１及び第２の
    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。
JP1989082814U 1989-07-14 1989-07-14 冷却ファンの機能低下検出回路 Expired - Fee Related JPH0729757Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989082814U JPH0729757Y2 (ja) 1989-07-14 1989-07-14 冷却ファンの機能低下検出回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989082814U JPH0729757Y2 (ja) 1989-07-14 1989-07-14 冷却ファンの機能低下検出回路

Publications (2)

Publication Number Publication Date
JPH0321999U true JPH0321999U (ja) 1991-03-06
JPH0729757Y2 JPH0729757Y2 (ja) 1995-07-05

Family

ID=31629955

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989082814U Expired - Fee Related JPH0729757Y2 (ja) 1989-07-14 1989-07-14 冷却ファンの機能低下検出回路

Country Status (1)

Country Link
JP (1) JPH0729757Y2 (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5212437U (ja) * 1975-07-14 1977-01-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5212437U (ja) * 1975-07-14 1977-01-28

Also Published As

Publication number Publication date
JPH0729757Y2 (ja) 1995-07-05

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