JPH0374199U - - Google Patents
Info
- Publication number
- JPH0374199U JPH0374199U JP1989133185U JP13318589U JPH0374199U JP H0374199 U JPH0374199 U JP H0374199U JP 1989133185 U JP1989133185 U JP 1989133185U JP 13318589 U JP13318589 U JP 13318589U JP H0374199 U JPH0374199 U JP H0374199U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- fan motor
- driving
- sawtooth voltage
- circuit
- 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 7
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Control Of Electric Motors In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
第１図は本考案回路を示す回路図、第２図は第
１図の動作を示す波形図、第３図は従来回路を示
す回路図、第４図は第３図の動作を示す波形図で
ある。
Ｒｓ……サーミスタ、ＣＭＰ……コンパレータ
、Ｑ０，Ｑ１，Ｑ２，Ｑ３……トランジスタ、Ｒ
３，Ｒ４，Ｒ５，Ｒ６，Ｒ７……抵抗。
Fig. 1 is a circuit diagram showing the circuit of the present invention, Fig. 2 is a waveform diagram showing the operation of Fig. 1, Fig. 3 is a circuit diagram showing the conventional circuit, and Fig. 4 is a waveform diagram showing the operation of Fig. 3. It is. R s ... thermistor, CMP ... comparator, Q 0 , Q 1 , Q 2 , Q 3 ... transistor, R
3 , R4 , R5 , R6 , R7 ...Resistance.
Claims (1)
圧発生回路と、温度検知素子の検知温度に基づい
て変化する検知電圧と前記鋸歯状電圧とをレベル
比較し、前記鋸歯状電圧が前記検知電圧より大の
時にフアンモータを駆動又は非駆動状態とし、且
つ、前記鋸歯状電圧が前記検知電圧より小の時に
前記フアンモータを非駆動又は駆動状態とするた
めの駆動信号を出力する比較回路とを備え、前記
検知電圧の変化に基づいて前記フアンモータを可
変速駆動するフアンモータの可変速回路において
、 前記鋸歯状電圧の最小値を前記検知電圧の最小
値より大とする鋸歯状電圧制御回路を備えたこと
を特徴とするフアンモータの可変速回路。 (2) 前記検知電圧は、前記温度検知素子の検知
温度が高くなるに従つて小となることを特徴とす
る請求項(1)記載のフアンモータの可変速回路。 (3) 前記検知電圧が最小値の時、前記比較回路
は、前記フアンモータを常時駆動するための駆動
信号を出力することを特徴とする請求項(2)記載
のフアンモータの可変速回路。[Claims for Utility Model Registration] (1) A sawtooth voltage generation circuit that generates a sawtooth voltage with a predetermined cycle, and a detection voltage that changes based on the temperature detected by a temperature detection element and a level comparison between the sawtooth voltage and the sawtooth voltage. , for driving or non-driving the fan motor when the sawtooth voltage is higher than the detection voltage, and driving or non-driving the fan motor when the sawtooth voltage is lower than the detection voltage; and a comparison circuit that outputs a drive signal, and drives the fan motor at a variable speed based on a change in the detected voltage, wherein the minimum value of the sawtooth voltage is determined from the minimum value of the detected voltage. A variable speed circuit for a fan motor, characterized in that it is equipped with a sawtooth voltage control circuit. (2) The variable speed circuit for a fan motor according to claim (1), wherein the detection voltage becomes smaller as the temperature detected by the temperature detection element becomes higher. (3) The variable speed circuit for a fan motor according to claim (2), wherein when the detection voltage is a minimum value, the comparison circuit outputs a drive signal for constantly driving the fan motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989133185U JP2546310Y2 (en) | 1989-11-16 | 1989-11-16 | Variable speed circuit of fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989133185U JP2546310Y2 (en) | 1989-11-16 | 1989-11-16 | Variable speed circuit of fan motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0374199U true JPH0374199U (en) | 1991-07-25 |
| JP2546310Y2 JP2546310Y2 (en) | 1997-08-27 |
Family
ID=31680598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989133185U Expired - Lifetime JP2546310Y2 (en) | 1989-11-16 | 1989-11-16 | Variable speed circuit of fan motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2546310Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6336197U (en) * | 1986-08-21 | 1988-03-08 |
-
1989
- 1989-11-16 JP JP1989133185U patent/JP2546310Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6336197U (en) * | 1986-08-21 | 1988-03-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2546310Y2 (en) | 1997-08-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |