JPS55164791A - Turn controller for fan motor - Google Patents
Turn controller for fan motorInfo
- Publication number
- JPS55164791A JPS55164791A JP7225779A JP7225779A JPS55164791A JP S55164791 A JPS55164791 A JP S55164791A JP 7225779 A JP7225779 A JP 7225779A JP 7225779 A JP7225779 A JP 7225779A JP S55164791 A JPS55164791 A JP S55164791A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- thermister
- fan
- power transistor
- fan motor
- 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
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Direct Current Motors (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
PURPOSE: To ensure prevention of occurrence of fire by preventing overheating which occurs in the case of stopping operation of the fan forcibly, by abolishing the use of a thermospring provided in a power transistor, and by connecting a thermistor to the system instead.
CONSTITUTION: The turn controller 20 is connected to the thermister 21 which has such a characteristic as to rapidly lower electric resistance at the time of ascent of temperatue and is provided in parallel with a transistor circuit 23 connecting the power transistor 22's base terminal B to an emitter terminal E through 2 transistors. In this mechanism, if the fan was stopped forcibly and an excessibely large current passed a fan motor M, transistor 22 went up, since electric resistance of the thermister 21 goes down, base current IB does not pass the transistor circuit 23 and most part of it passes the thermister 21 to turn off the power transistor 22, and therefore, temperature ascent is prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7225779A JPS55164791A (en) | 1979-06-11 | 1979-06-11 | Turn controller for fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7225779A JPS55164791A (en) | 1979-06-11 | 1979-06-11 | Turn controller for fan motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55164791A true JPS55164791A (en) | 1980-12-22 |
Family
ID=13484052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7225779A Pending JPS55164791A (en) | 1979-06-11 | 1979-06-11 | Turn controller for fan motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55164791A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57129296A (en) * | 1981-02-03 | 1982-08-11 | Nippon Denso Co Ltd | Controlling apparatus for air flow rate |
| JPS57144117A (en) * | 1981-02-26 | 1982-09-06 | Nippon Denso Co Ltd | Controller for air conditioner of car |
| JPS5810198A (en) * | 1981-07-13 | 1983-01-20 | Nec Corp | Controlling apparatus for revolution speed of cooling fan |
| US4982143A (en) * | 1988-02-15 | 1991-01-01 | Robert Bosch Gmbh | Phase control circuit for protection of a motor against thermal overload |
-
1979
- 1979-06-11 JP JP7225779A patent/JPS55164791A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57129296A (en) * | 1981-02-03 | 1982-08-11 | Nippon Denso Co Ltd | Controlling apparatus for air flow rate |
| JPH0315039B2 (en) * | 1981-02-03 | 1991-02-28 | Nippon Denso Co | |
| JPS57144117A (en) * | 1981-02-26 | 1982-09-06 | Nippon Denso Co Ltd | Controller for air conditioner of car |
| JPS6230931B2 (en) * | 1981-02-26 | 1987-07-06 | Nippon Denso Kk | |
| JPS5810198A (en) * | 1981-07-13 | 1983-01-20 | Nec Corp | Controlling apparatus for revolution speed of cooling fan |
| JPH0257239B2 (en) * | 1981-07-13 | 1990-12-04 | Nippon Electric Co | |
| US4982143A (en) * | 1988-02-15 | 1991-01-01 | Robert Bosch Gmbh | Phase control circuit for protection of a motor against thermal overload |
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