JPH01171599U - - Google Patents
Info
- Publication number
- JPH01171599U JPH01171599U JP6836488U JP6836488U JPH01171599U JP H01171599 U JPH01171599 U JP H01171599U JP 6836488 U JP6836488 U JP 6836488U JP 6836488 U JP6836488 U JP 6836488U JP H01171599 U JPH01171599 U JP H01171599U
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- frequency
- inverter
- set temperature
- motor drive
- 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
- 230000002159 abnormal effect Effects 0.000 claims 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Control Of Ac Motors In General (AREA)
Description
第１図及び第２図は本考案の例に係るブロツク
示構成図及び作動フロー線図、第３図はパワーＭ
ＯＳＦＥＴの特性図である。
１…モータ駆動用インバータ、２…パワーＭＯ
ＳＦＥＴ、３…温度調節器、４…周波数制御手段
。
1 and 2 are block diagrams and operational flow diagrams according to an example of the present invention, and FIG. 3 is a power M
It is a characteristic diagram of OSFET. 1...Motor drive inverter, 2...Power MO
SFET, 3... Temperature controller, 4... Frequency control means.
Claims (1)
いたモータ駆動用インバータ１において、前記各
パワーＭＯＳＦＥＴ２，２の冷却用フイン温度を
検出し、かつ、デイフアレンシヤルを持つ設定温
度と比較して、設定温度の上限値以上であれば異
常温度信号を発信する一方、設定温度の下限値以
下であれば前記異常温度信号を消信する温度調節
器３と、前記異常温度信号を受けている間作動し
て、前記モータ駆動用インバータ１に対し現出力
周波数が所定周波数に比し高い場合に、出力周波
数を前記所定周波数に強制低下させる周波数変更
出力を発生し前記インバータ１に与える周波数制
御手段４とを備えていることを特徴とするモータ
駆動用インバータの過熱保護装置。 In a motor drive inverter 1 using a power MOSFET 2 as a switching element, the cooling fin temperature of each of the power MOSFETs 2, 2 is detected, and the upper limit value of the set temperature is determined by comparing it with a set temperature having a differential. A temperature controller 3 transmits an abnormal temperature signal if the temperature is above the lower limit value, and mutes the abnormal temperature signal if the temperature is lower than the lower limit of the set temperature; Frequency control means 4 for generating and applying to the inverter 1 a frequency changing output for forcibly lowering the output frequency to the predetermined frequency when the current output frequency of the drive inverter 1 is higher than the predetermined frequency. An overheat protection device for motor drive inverters featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6836488U JPH01171599U (en) | 1988-05-24 | 1988-05-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6836488U JPH01171599U (en) | 1988-05-24 | 1988-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01171599U true JPH01171599U (en) | 1989-12-05 |
Family
ID=31293686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6836488U Pending JPH01171599U (en) | 1988-05-24 | 1988-05-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01171599U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008537325A (en) * | 2005-03-22 | 2008-09-11 | エスエーヴェー−オイロドライブ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コムパニー コマンディトゲゼルシャフト | Apparatus and method for measuring temperature of heat absorber |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60245494A (en) * | 1984-05-18 | 1985-12-05 | Matsushita Electric Ind Co Ltd | Power transistor protecting device of frequency control type air conditioner |
-
1988
- 1988-05-24 JP JP6836488U patent/JPH01171599U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60245494A (en) * | 1984-05-18 | 1985-12-05 | Matsushita Electric Ind Co Ltd | Power transistor protecting device of frequency control type air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008537325A (en) * | 2005-03-22 | 2008-09-11 | エスエーヴェー−オイロドライブ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コムパニー コマンディトゲゼルシャフト | Apparatus and method for measuring temperature of heat absorber |