JPS63213436A - Cooling fan for motor and the like for inverter controlled compressor - Google Patents
Cooling fan for motor and the like for inverter controlled compressorInfo
- Publication number
- JPS63213436A JPS63213436A JP4523887A JP4523887A JPS63213436A JP S63213436 A JPS63213436 A JP S63213436A JP 4523887 A JP4523887 A JP 4523887A JP 4523887 A JP4523887 A JP 4523887A JP S63213436 A JPS63213436 A JP S63213436A
- Authority
- JP
- Japan
- Prior art keywords
- main motor
- cooling fan
- frequency
- cooling
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 56
- 238000007710 freezing Methods 0.000 claims abstract description 5
- 230000008014 freezing Effects 0.000 claims abstract description 5
- 230000020169 heat generation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Landscapes
- Motor Or Generator Cooling System (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
〔産業上の利用分野〕
本発明は、主モートルの冷却に係り、特にインバータ制
御等により周波数変化及び回転数変化を受は負荷変動が
ないため過電流による発熱で焼損する恐れのある主モー
トルの冷却に好適な、モートル他冷却ファンに関する。[Industrial Field of Application] The present invention relates to the cooling of main motors, and in particular to the cooling of main motors that are subject to frequency changes and rotational speed changes due to inverter control, etc., and which are susceptible to burnout due to heat generation due to overcurrent as there is no load fluctuation. This invention relates to motors and other cooling fans suitable for cooling.
従来のモートルの冷却装置は、周知のようにモートルの
回転軸に付けた羽根車により構成されたものまたは、他
冷却ファンの電源を別電源から得ているだけのため、常
に一定回転で一定の風量しか送風比、来ないように成っ
ていた。
（発明が解決しようとする問題点〕
上記従来技術は、他冷却ファンの電源を別電源としてい
るため、主モートルの回転数がどのような状況でも常に
一定量の送風しか出来ず、非効率的である点について配
慮されておらず、寒冷地にてこの装置を使用した場合、
主モートルが高速回転していて、自冷部ファンの効果が
最大限に発揮されている時でさえ、必要以上の冷却風を
送風するため、主モートルが凍結する恐れがあると云う
問題があった。
本発明の目的は１周波数検出器を用いて、インバータか
ら主モートルに印加される周波数の高低を検出させ、そ
の周波数で回転する主モートルの回転数に対応した冷却
風を（例えば高速■転時には少量、中速時には中量、低
速時には多量の冷却風を）主モートルに与え、主モート
ルの温度を一定に保ち主モートルの焼損及び凍結を防ぐ
ことにある。
〔問題点を解決するための手段〕
上記目的は、主モートル他冷却ファンの設置方法を容易
にするために、主モートルの吸気口である反負荷側エン
ドブラケットにナツトにて固定し、周波数検出器を用い
て、インバータから主モートルに印加される周波数を検
出し、その周波数における主モートルの回転数が高速回
転ならば冷却ファンを低速回転させ、中速回転では中速
、低速回転では高速回転させ、主モートルの回転数、す
なわち、主モートルの自冷部ファンの冷却風量に見合っ
た冷却風を主モートルに与え、低周波数帯域の過電流で
発熱した主モートルを、段階的に効率よく冷却し一定温
度に保つように制御することにより達成される。尚この
冷却ファンの形状および風量制御方法はいかなる形式の
ものでもよい。
〔作用〕
主モートルの空気吸入口である反負荷側エンドブラケッ
トに取付けられた冷却ファンは、周波数検出器によりイ
ンバータから主モートルに印加される電圧の周波数の高
低を検出し、主モートルの回転数に対応する冷却風を供
給する。例えば、主モートルが高速回転している時には
、主モートルの自冷却ファンも高速回転し、その冷却能
力を最大限に発揮しているので、冷却ファンは低速回転
し最低限主モートルに必要な量の冷却風だけ供給する。
以下、主モートルが中速、低速回転時にも上記と同じ要
領で、中量、多量の冷却風を段階的に主モートルに供給
する。それによって、低周波数帯域で回転数が低下し、
負荷変動が起らずに過電流が発生し液熱した主モートル
は、段階的に効率よく一定温度に冷却されて焼損する事
がなく、また、寒冷地にて使用する場合、主モートルが
高速回転して自冷却能力が最大限発揮されている場合で
も、主モートルが凍結することはない。
〔実施例〕
以下、本発明の一実施例を図により説明する。
図において、インバータ６より周波数制御を受ける主モ
ートル１のエンドブラケット３の後部に冷却ファン２を
取付ける。容量制御時にインバータ６より主モートル１
に印加される電圧の周波数は規定値よりも変化され、こ
の変化される度合いを、周波数検出器５によって検出さ
せる。例えば、主モートル１が５０もしくは６０ Ｈｚ
の規定の周波数もしくはそれ以上の周波数で回転してい
る場合には、主モートル１の主モートル自冷却ファン４
は、その冷却機能を最大限に発揮し、主モーｌ−ル１は
モーＩ−ルの温度上昇の規定値以内に冷却されているの
で、冷却ファン２は低回転で低量の冷却風を供給するよ
うにさせる。主モートル１が中。
低速回転している時も上記と同様に冷却ファン２を制御
させ、中速回転時には中量、低速回転時には多量の冷却
風を供給させるようにする。この場合の冷却ファンの形
状及び制御の形式はいかなる方法でもよい。本実施例に
よれば、主モートル１の回転速度に応じて冷却ファン２
の風量を段階的に制御するため、効率よく主モートル１
を冷却出来、常に一定温度に保たせる事により主モート
ルの熱焼損及び寒冷地での凍結を防ぐ効果がある。
〔発明の効果〕
以上のように本発明によれば、この冷却ファンは冷却風
量を周波数検出器によって制御させるので、従来の主モ
ートル自冷却ファンや他冷却ファンと違って、主モート
ルの回転数に対応した冷却風を段階的に供給するので、
効率的かつ主モートルの温度上昇を一定範囲内におさえ
、主モートルの焼損事故および寒冷地での凍結を防止出
来る。Conventional motor cooling devices, as is well known, consist of an impeller attached to the rotating shaft of the motor, or the power for the cooling fan is obtained from a separate power source, so it always rotates at a constant rate. The airflow ratio was such that it only affected the airflow. (Problems to be solved by the invention) The above conventional technology uses a separate power source for the other cooling fans, so it is inefficient because it can only blow a certain amount of air regardless of the rotational speed of the main motor. If this device is used in a cold region without consideration given to the
Even when the main motor is rotating at high speed and the self-cooling section fan is maximizing its effectiveness, there is a problem that the main motor may freeze because it blows more cooling air than necessary. Ta. The purpose of the present invention is to use a single frequency detector to detect the high and low frequencies applied to the main motor from the inverter, and to generate cooling air corresponding to the rotational speed of the main motor rotating at that frequency (for example, during high-speed rotation). The main motor is supplied with a small amount of cooling air (a small amount at medium speed, a large amount at low speed) to the main motor to keep the temperature of the main motor constant and prevent burnout and freezing of the main motor. [Means for solving the problem] The above purpose is to facilitate the installation of the main motor and other cooling fans by fixing them with nuts to the end bracket on the opposite load side, which is the intake port of the main motor, and detecting the frequency. The frequency applied to the main motor from the inverter is detected using a device, and if the main motor rotation speed at that frequency is high rotation, the cooling fan is rotated at low speed, medium speed rotation is medium speed rotation, and high speed rotation is low speed rotation. This provides the main motor with cooling air commensurate with the rotational speed of the main motor, that is, the cooling air volume of the main motor's self-cooling fan, and efficiently cools the main motor that generates heat due to overcurrent in the low frequency band in stages. This is achieved by controlling the temperature to maintain a constant temperature. Note that the shape and air volume control method of this cooling fan may be of any type. [Operation] The cooling fan attached to the end bracket on the opposite load side, which is the air intake port of the main motor, uses a frequency detector to detect the frequency of the voltage applied to the main motor from the inverter, and determines the rotational speed of the main motor. Supply cooling air corresponding to For example, when the main motor is rotating at high speed, the main motor's self-cooling fan also rotates at high speed and maximizes its cooling capacity, so the cooling fan rotates at low speed to provide the minimum amount of air needed by the main motor. Only cooling air is supplied. Thereafter, even when the main motor rotates at medium or low speeds, a medium or large amount of cooling air is supplied to the main motor in stages in the same manner as above. As a result, the rotation speed decreases in the low frequency band,
The main motor, which is heated by liquid heat due to overcurrent without load fluctuations, is efficiently cooled down to a constant temperature in stages and will not burn out, and when used in cold regions, the main motor will be able to operate at high speed. The main motor will not freeze even when rotating and maximizing its self-cooling capacity. [Example] Hereinafter, an example of the present invention will be described with reference to the drawings. In the figure, a cooling fan 2 is attached to the rear of an end bracket 3 of a main motor 1 which receives frequency control from an inverter 6. Main motor 1 from inverter 6 during capacity control
The frequency of the voltage applied to is changed from a specified value, and the frequency detector 5 detects the degree of this change. For example, main motor 1 is 50 or 60 Hz
If the main motor 1 is rotating at a specified frequency or higher, the main motor self-cooling fan 4 of the main motor 1
The cooling fan 2 maximizes its cooling function, and the main mall 1 is cooled within the specified temperature rise of the mall, so the cooling fan 2 blows a small amount of cooling air at low rotation speed. Let them supply it. Main motor 1 is in the middle. The cooling fan 2 is controlled in the same manner as described above even when rotating at a low speed, so that a medium amount of cooling air is supplied when rotating at a medium speed, and a large amount of cooling air is supplied when rotating at a low speed. In this case, the shape and control method of the cooling fan may be any method. According to this embodiment, the cooling fan 2
Main motor 1 efficiently controls the air volume in stages.
By keeping the main motor at a constant temperature, it is effective in preventing thermal burnout of the main motor and freezing in cold regions. [Effects of the Invention] As described above, according to the present invention, since this cooling fan controls the cooling air volume using a frequency detector, unlike the conventional main motor self-cooling fan and other cooling fans, the main motor rotation speed Since cooling air is supplied in stages according to the
Efficiently suppresses the temperature rise of the main motor within a certain range, preventing the main motor from burning out and freezing in cold regions.
１１図は本発明の一実施例のモートル他冷却ファンのシ
ステム系統図である。
１・・・主モートル、２・・・冷却ファン、３・・・エ
ンドブラケット、４・・・主モートル自冷却ファン、５
・・・周波数検出器、６・・・インバータ。FIG. 11 is a system diagram of a cooling fan including a motor according to an embodiment of the present invention. 1... Main motor, 2... Cooling fan, 3... End bracket, 4... Main motor self-cooling fan, 5
...Frequency detector, 6...Inverter.
Claims (1)
縮機より成るインバータ制御圧縮機において、主モート
ルのエンドブラケット部に冷却ファンを取付け、周波数
検出器により主モートルに加えられる電圧の周波数を検
出させ、その周波数で回転する主モートルに対応する冷
却風を（例えば、主モートル高速回転の場合には主モー
トルの自冷却ファンも高速回転しているので、低量の風
量を）与えるような冷却ファンを設け主モートルの発熱
を一定範囲内に押え、主モートルの焼損及び凍結を防止
できようにしたことを特徴とする、インバータ制御圧縮
機のモートル他冷却ファン。1. In an inverter-controlled compressor consisting of an inverter unit and a packaged screw compressor, a cooling fan is attached to the end bracket of the main motor, and a frequency detector detects the frequency of the voltage applied to the main motor. A cooling fan is installed to provide cooling air corresponding to the rotating main motor (for example, when the main motor is rotating at high speed, the main motor's self-cooling fan is also rotating at high speed, so a small amount of air is supplied). 1. A motor and other cooling fan for an inverter-controlled compressor, which is characterized by suppressing heat generation within a certain range and preventing burnout and freezing of the main motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4523887A JPS63213436A (en) | 1987-03-02 | 1987-03-02 | Cooling fan for motor and the like for inverter controlled compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4523887A JPS63213436A (en) | 1987-03-02 | 1987-03-02 | Cooling fan for motor and the like for inverter controlled compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63213436A true JPS63213436A (en) | 1988-09-06 |
Family
ID=12713675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4523887A Pending JPS63213436A (en) | 1987-03-02 | 1987-03-02 | Cooling fan for motor and the like for inverter controlled compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63213436A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2392738A (en) * | 2002-06-05 | 2004-03-10 | Kobe Steel Ltd | A method of controlling a motor cooling fan for a screw compressor |
| US7969051B2 (en) * | 2005-09-29 | 2011-06-28 | Valeo Equipements Electriques Moteur | Forced-fluid flow ventilating system for rotating electrical machines and rotating electrical machine comprising same |
| JP2016092905A (en) * | 2014-10-31 | 2016-05-23 | 東芝三菱電機産業システム株式会社 | Dynamo-electric machine with intercession fan |
-
1987
- 1987-03-02 JP JP4523887A patent/JPS63213436A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2392738A (en) * | 2002-06-05 | 2004-03-10 | Kobe Steel Ltd | A method of controlling a motor cooling fan for a screw compressor |
| GB2392738B (en) * | 2002-06-05 | 2005-01-12 | Kobe Steel Ltd | Screw compressor |
| US7033144B2 (en) | 2002-06-05 | 2006-04-25 | Kabushiki Kaisha Kobe Seiko Sho | Cooling fan for a screw compressor drive motor |
| BE1017500A5 (en) * | 2002-06-05 | 2008-11-04 | Kobe Steel Ltd | SCREW COMPRESSOR. |
| US7969051B2 (en) * | 2005-09-29 | 2011-06-28 | Valeo Equipements Electriques Moteur | Forced-fluid flow ventilating system for rotating electrical machines and rotating electrical machine comprising same |
| JP2016092905A (en) * | 2014-10-31 | 2016-05-23 | 東芝三菱電機産業システム株式会社 | Dynamo-electric machine with intercession fan |
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