JPH10145961A - Overheat preventive device for commutatorless motor - Google Patents
Overheat preventive device for commutatorless motorInfo
- Publication number
- JPH10145961A JPH10145961A JP9307499A JP30749997A JPH10145961A JP H10145961 A JPH10145961 A JP H10145961A JP 9307499 A JP9307499 A JP 9307499A JP 30749997 A JP30749997 A JP 30749997A JP H10145961 A JPH10145961 A JP H10145961A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- phase power
- thermal protector
- power supply
- commutatorless
- 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
- 230000003449 preventive effect Effects 0.000 title abstract 4
- 230000001012 protector Effects 0.000 claims abstract description 33
- 238000004804 winding Methods 0.000 claims abstract description 31
- 230000002265 prevention Effects 0.000 claims description 14
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 12
- 238000013021 overheating Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Generators And Motors (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無整流子電動機
（ＢＬＤＣ Ｍｏｔｏｒ）の過熱防止装置の係るもの
で、詳しくは、無整流子電動機に過負荷が印加され温度
が上昇したとき、無整流子電動機の巻線が損傷されるこ
とを防止し得る無整流子電動機の過熱防止装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing overheating of a commutatorless motor (BLDC Motor). The present invention relates to an overheat prevention device for a commutatorless motor that can prevent a winding of a motor from being damaged.
【０００２】[0002]
【従来の技術】従来、無整流子電動機の過熱防止装置に
おいては、図３に示したように、３相の固定子巻線Ｗ
ｕ，Ｗｖ，Ｗｗを有する無整流子電動機１００と、入力
する単相電源４００の周波数及び電圧を３相電源Ｕ，
Ｖ，Ｗに変換し上記無整流子電動機１００に印加する制
御部２００と、該制御部２００と単相電源とを連結する
第１リードワイヤｌ1 ，ｌ2 と、上記無整流子電動機１
００と制御部２００とを連結する３つの第２リードワイ
ヤｌｕ，ｌｖ，ｌｗと、上記無整流子電動機１００の２
つの任意の固定子巻線Ｗｕ，Ｗｗと上記２つの第２リー
ドワイヤｌｕ，ｌｗとにそれぞれ直列接続され、それら
２つの固定子巻線Ｗｕ，Ｗｗから発生する温度を感知し
て上記２つの第２リードワイヤｌｕ，ｌｗと無整流子電
動機１００との接続を遮断する２個のサーマルプロテク
タ３００ｕ，３００ｗと、から構成されていた。2. Description of the Related Art Conventionally, in a device for preventing overheating of a non-commutator motor, as shown in FIG.
u, Wv, and Ww, and the frequency and voltage of the input single-phase power supply 400 are changed to the three-phase power supply U,
A control unit 200 for converting the voltage to V and W and applying the converted voltage to the non-commutator motor 100; first lead wires l 1 and l 2 connecting the control unit 200 to a single-phase power supply;
00 and the control unit 200, and three second lead wires lu, lv, and lw, and two of the non-commutator motors 100.
Are connected in series to two arbitrary stator windings Wu, Ww and the two second lead wires lu, lw, respectively, and sense the temperature generated from the two stator windings Wu, Ww to detect the two second windings Wu, Ww. The two lead wires lu and lw and two thermal protectors 300u and 300w that cut off the connection between the non-commutator motor 100 are provided.
【０００３】そして、それら２個のサーマルプロテクタ
３００ｕ，３００ｗが設けられた上記無整流子電動機１
００においては、図４に示したように、回転子１と、固
定子２と、該固定子２を貫通し負荷（図示されず）に連
結された軸３と、上記固定子２の鋸歯４と、該鋸歯４に
巻かれた３つの固定子巻線Ｗｕ，Ｗｖ，Ｗｗと、上記鋸
歯４間に設置され上記回転子１の位置を検出する位置セ
ンサー５とから構成され、上記２個のサーマルプロテク
タ３００ｕ，３００ｗはそれぞれ上記２つの固定子巻線
Ｗｕ，Ｗｗに設けられていた。[0003] The non-commutator motor 1 provided with the two thermal protectors 300u and 300w.
At 00, as shown in FIG. 4, a rotor 1, a stator 2, a shaft 3 penetrating through the stator 2 and connected to a load (not shown), and a saw tooth 4 of the stator 2. , Three stator windings Wu, Wv, Ww wound around the sawtooth 4, and a position sensor 5 installed between the sawtooth 4 and detecting the position of the rotor 1; The thermal protectors 300u and 300w are provided on the two stator windings Wu and Ww, respectively.
【０００４】このように構成された従来の無整流子電動
機の過熱防止装置の動作は次のようであった。即ち、単
相電源４００は第１リードワイヤｌ1 を経由して制御部
２００に印加され、位置センサー５は無整流子電動機１
００の回転子１の位置を検出し、上記制御部２００は上
記位置センサー５の検出値により、入力する単相電源４
００の周波数及び電圧を変更して３相電源Ｕ，Ｖ，Ｗを
出力し、該３相電源Ｕ，Ｖ，Ｗは３つの第２リードワイ
ヤｌｕ，ｌｖ，ｌｗを経由して鋸歯４に巻かれた３つの
固定子巻線Ｗｕ，Ｗｖ，Ｗｗにそれぞれ印加され、よっ
て上記回転子１が回転するようになる。The operation of the conventional overheat prevention device for a commutatorless motor constructed as described above is as follows. That is, the single-phase power supply 400 is applied to the control unit 200 via the first lead wire l 1 , and the position sensor 5 is connected to the non-commutator motor 1.
00, the controller 200 detects the position of the rotor 1 and inputs the single-phase power supply 4 based on the detected value of the position sensor 5.
00, and outputs three-phase power supplies U, V, and W. The three-phase power supplies U, V, and W are wound around the sawtooth 4 via three second lead wires lu, lv, and lw. The three stator windings Wu, Wv, and Ww are applied to the respective rotors, so that the rotor 1 rotates.
【０００５】このとき、軸３に連結された負荷（図示さ
れず）の大きさにより固定子巻線Ｗｕ，Ｗｖ，Ｗｗに流
れる電流の大きさが決定され、上記無整流子電動機１０
０から発生する損失は上記電流の大きさの自乗に比例
し、該損失によりそれら固定子巻線Ｗｕ，Ｗｖ，Ｗｗか
ら熱が発生される。そして、上記２個のサーマルプロテ
クタ３００ｕ，３００ｗが設けられたそれぞれの固定子
巻線Ｗｕ，Ｗｗの温度を感知し、所定温度以上になる
と、第２リードワイヤｌｕ，ｌｗを遮断する。即ち、上
記固定子巻線Ｗｕに密着して設けられた上記サーマルプ
ロテクタ３００ｕは上記固定子巻線Ｗｕの温度を感知し
て上記制御部２００から供給される電源Ｕを伝達する第
２リードワイヤｌｕを遮断し、上記固定子巻線Ｗｗに密
着して設けられた上記サーマルプロテクタ３００ｗは上
記固定子巻線Ｗｗの温度を感知して電源Ｗを伝達する第
２リードワイヤｌｗを遮断する。At this time, the magnitude of the current flowing through the stator windings Wu, Wv, Ww is determined by the magnitude of the load (not shown) connected to the shaft 3, and
The loss generated from zero is proportional to the square of the magnitude of the current, and the loss generates heat from the stator windings Wu, Wv, Ww. Then, the temperature of each of the stator windings Wu, Ww provided with the two thermal protectors 300u, 300w is sensed, and when the temperature exceeds a predetermined temperature, the second lead wires lu, lw are cut off. That is, the thermal protector 300u provided in close contact with the stator winding Wu senses the temperature of the stator winding Wu and transmits the power U supplied from the control unit 200 to the second lead wire lu. And the thermal protector 300w provided in close contact with the stator winding Ww detects the temperature of the stator winding Ww and cuts off the second lead wire lw for transmitting the power supply W.
【０００６】次いで、それら第２リードワイヤｌｕ，ｌ
ｗが遮断されると、上記電動機１００に印加する３相電
源Ｕ，Ｖ，Ｗが遮断されるため、該電動機１００は駆動
が停止され、よって、該電動機１００の温度上昇が中止
される。しかし、上記３相電源Ｕ，Ｖ，Ｗ中任意の１相
の電源Ｕのみが遮断される場合がしばしばあって、この
ような場合、残りの２相Ｖ，Ｗに印加される電流のみに
よっても回転磁界は形成される。勿論、該回転磁界によ
るトルクは正常状態における回転磁界によるトルクより
は小さいが、電動機は駆動される。従って、従来無整流
子電動機の過熱防止装置では、２個のサーマルプロテク
タ３００ｕ，３００ｗが一緒に動作しない限り電動機の
駆動を完全に中止させることはできない。Next, the second lead wires lu, l
When w is cut off, the three-phase power supplies U, V, W applied to the motor 100 are cut off, so that the drive of the motor 100 is stopped, and the temperature rise of the motor 100 is stopped. However, it is often the case that only an arbitrary one-phase power source U among the three-phase power sources U, V, W is cut off. In such a case, only the current applied to the remaining two-phase power sources V, W is used. A rotating magnetic field is formed. Of course, the torque due to the rotating magnetic field is smaller than the torque due to the rotating magnetic field in a normal state, but the electric motor is driven. Therefore, in the conventional overheat prevention device for a commutatorless motor, the drive of the motor cannot be completely stopped unless the two thermal protectors 300u and 300w operate together.
【０００７】[0007]
【発明が解決しようとする課題】然るに、このような従
来の無整流子電動機の過熱防止装置においては、２個の
サーマルプロテクタがそれぞれのリードワイヤに連結し
て構成されるため、結線が煩雑になって、製造コストが
上昇するという不都合な点があった。本発明は、このよ
うな従来の課題に鑑みてなされたもので、１個のサーマ
ルプロテクタを用い電動機に印加される３相電源を完全
に遮断し得る無整流子電動機の過熱防止装置を提供する
ことを目的とする。However, in such a conventional device for preventing overheating of a commutatorless motor, since two thermal protectors are connected to respective lead wires, the connection is complicated. As a result, there is an inconvenience that the manufacturing cost increases. The present invention has been made in view of such conventional problems, and provides an overheat prevention device for a commutatorless motor that can completely shut off three-phase power applied to the motor using one thermal protector. The purpose is to:
【０００８】[0008]
【課題を解決するための手段】このような目的を達成す
るため、本発明にかかる無整流子電動機の過熱防止装置
は、単相電源を３相電源に変換し無整流子電動機に印加
する制御部と、無整流子電動機の温度を感知するサーマ
ルプロテクタとを含んで構成され、該サーマルプロテク
タの温度感知結果により上記無整流子電動機の駆動を停
止させる無整流子電動機の過熱防止装置において、上記
サーマルプロテクタは上記無整流子電動機の２つの固定
子巻線間に設けられ、該サーマルプロテクタの温度感知
結果により上記制御部に入力する単相電源４００を遮断
するように構成されている。In order to achieve the above object, an overheat prevention device for a non-commutator motor according to the present invention controls a single-phase power supply to a three-phase power supply and applies the power to the non-commutator motor. And a thermal protector configured to sense the temperature of the non-commutator motor, wherein the overheat prevention device for the non-commutator motor stops driving the non-commutator motor based on a temperature detection result of the thermal protector. The thermal protector is provided between the two stator windings of the non-commutator motor, and is configured to cut off the single-phase power supply 400 input to the control unit according to the temperature sensing result of the thermal protector.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態に対
し、図面を用いて説明する。本発明にかかる無整流子電
動機の過熱防止装置の第１実施形態においては、図１に
示したように、３相の固定子巻線Ｗｕ，Ｗｖ，Ｗｗを有
する無整流子電動機１００と、入力する単相電源４００
の周波数及び電圧を３相電源Ｕ，Ｖ，Ｗに変換し上記無
整流子電動機１００に印加する制御部２００と、単相電
源４００と上記制御部２００とを連結する第１リードワ
イヤｌ1 ，ｌ2 と、上記無整流子電動機１００と制御部
２００とを連結する３つの第２リードワイヤｌｕ，ｌ
ｖ，ｌｗと、上記第１リードワイヤの一方ｌ1 に直列接
続され、上記無整流子電動機１００の２つの固定子巻線
Ｗｕ，Ｗｗ間に設置されてそれら固定子巻線Ｗｕ，Ｗｗ
から発生する温度が所定温度以上になると、上記第１リ
ードワイヤｌ1 と制御部２００との接続を遮断するサー
マルプロテクタ３００と、から構成されている。Embodiments of the present invention will be described below with reference to the drawings. In the first embodiment of the overheat prevention device for a commutatorless motor according to the present invention, as shown in FIG. 1, a commutatorless motor 100 having three-phase stator windings Wu, Wv, Ww, and an input. Single phase power supply 400
And a first lead wire l 1 , which connects the single-phase power supply 400 and the control unit 200 to each other, and converts the frequency and voltage to three-phase power supplies U, V, and W and applies the same to the non-commutator motor 100. l 2 and three second lead wires lu and l connecting the commutatorless motor 100 and the control unit 200.
v, lw and one of the first lead wires 11 are connected in series, and are installed between the two stator windings Wu, Ww of the non-commutator motor 100, and the stator windings Wu, Ww are provided.
If the temperature generated from is equal to or higher than a predetermined temperature, the thermal protector 300 to cut off the connection between the first lead wire l 1 and the control unit 200, and a.
【００１０】そして、上記サーマルプロテクタ３００の
設置された上記無整流子電動機１００においては、図２
に示したように、従来の無整流子電動機１００を示した
図４の構成と同様であるが、只、上記サーマルプロテク
タ３００の一方の面は上記固定子巻線Ｗｕに、他方の面
は上記固定子巻線Ｗｗに密着して設けられて構成されて
いる。In the commutatorless motor 100 provided with the thermal protector 300, FIG.
As shown in FIG. 4, the configuration is the same as that of the conventional non-commutator motor 100 shown in FIG. 4, except that one surface of the thermal protector 300 is the stator winding Wu and the other surface is the It is configured to be provided in close contact with the stator winding Ww.
【００１１】以下、本発明にかかる無整流子電動機の過
熱防止装置の動作を説明する。先ず、単相電源４００は
第１リードワイヤｌ1 と電動機１００に設けられたサー
マルプロテクタ３００とを経由して上記制御部２００に
印加され、該制御部２００は位置センサー５の検出値に
より３相電源Ｕ，Ｖ，Ｗを出力し、該３相電源Ｕ，Ｖ，
Ｗは第２リードワイヤｌｕ，ｌｖ，ｌｗを経由して固定
子２の鋸歯４に巻かれた固定子巻線Ｗｕ，Ｗｖ，Ｗｗに
印加され、上記回転子３が回転するようになる。The operation of the overheat prevention device for a commutatorless motor according to the present invention will be described below. First, single-phase power supply 400 is applied via a thermal protector 300 provided to the first lead wire l 1 and the electric motor 100 to the control unit 200, the control unit 200 3-phase value detected by the position sensor 5 The power supplies U, V, W are output, and the three-phase power supplies U, V,
W is applied to the stator windings Wu, Wv, Ww wound on the sawtooth 4 of the stator 2 via the second lead wires lu, lv, lw, so that the rotor 3 rotates.
【００１２】このとき、上記サーマルプロテクタ３００
が設けられた２個の固定子巻線Ｗｕ，Ｗｗの温度を感知
し、所定温度以上になると、入力する単相電源４００と
上記制御部２００とを接続する上記第１リードワイヤｌ
1 を遮断する。ここで、上記サーマルプロテクタ３００
は、素子の特性上、上記２つの固定子巻線Ｗｕ，Ｗｗ中
高温の固定子巻線側の温度を検出する。At this time, the thermal protector 300
The temperature of the two stator windings Wu and Ww provided with the first lead wire l for connecting the input single-phase power supply 400 and the control unit 200 when the temperature exceeds a predetermined temperature is detected.
1 to block. Here, the thermal protector 300
Detects the temperature on the stator winding side, which is a high temperature between the two stator windings Wu and Ww, due to the characteristics of the element.
【００１３】次いで、上記第１リードワイヤｌ1 が開放
されると、上記制御部２００に印加した単相電源が遮断
されるため、電動機１００の駆動は停止される。Next, when the first lead wire l 1 is opened, the single-phase power applied to the control unit 200 is cut off, and the driving of the motor 100 is stopped.
【００１４】[0014]
【発明の効果】以上説明したように、本発明にかかる無
整流子電動機の過熱防止装置においては、１個のサーマ
ルプロテクタを用いて電動機に印加する電源を遮断する
ため、サーマルプロテクタの数が減少し、リードワイヤ
の長さも減少し、製造工程が簡単になって、製造コスト
が低減されるという効果がある。As described above, in the overheat prevention device for a commutatorless motor according to the present invention, the number of thermal protectors is reduced because one thermal protector is used to cut off the power applied to the motor. However, the length of the lead wire is also reduced, the manufacturing process is simplified, and the manufacturing cost is reduced.
【図１】本発明の１実施形態にかかる無整流子電動機の
過熱防止装置を示した構成図である。FIG. 1 is a configuration diagram illustrating an overheat prevention device for a commutatorless motor according to an embodiment of the present invention.
【図２】図１の無整流子電動機１００を示した断面図で
ある。FIG. 2 is a sectional view showing the commutatorless motor 100 of FIG.
【図３】従来無整流子電動機の過熱防止装置を示した構
成図である。FIG. 3 is a configuration diagram showing a conventional overheat prevention device for a commutatorless motor.
【図４】図３の無整流子電動機１００を示した断面図で
ある。FIG. 4 is a cross-sectional view showing the commutatorless motor 100 of FIG.
１…回転子 ２…固定子 ３…軸 ４…鋸歯 ５…位置センサー １００…無整流子電動機 ２００…制御部 ３００…サーマルプロテクタ ｌ1 ，ｌ2 …第１リードワイヤ ｌｕ，ｌｖ，ｌｗ…第２リードワイヤ Ｗｕ，Ｗｖ，Ｗｗ…固定子巻線1 ... rotor 2 ... a stator 3 ... Axis 4 ... serrated 5 ... position sensor 100 ... Brushless DC electric motor 200 ... control unit 300 ... thermal protector l 1, l 2 ... first lead wire lu, lv, lw ... second Lead wire Wu, Wv, Ww ... stator winding
Claims (3)
を有する無整流子電動機（１００）と、 入力する単相電源（４００）の周波数及び電圧を３相電
源（Ｕ，Ｖ，Ｗ）に変換し上記無整流子電動機（１０
０）に印加する制御部（２００）と、 単相電源（４００）と上記制御部（２００）とを接続す
る第１リードワイヤ（ｌ1 ，ｌ2 ）と、 上記無整流子電動機（１００）と上記制御部（２００）
とを接続する３つの第２リードワイヤ（ｌｕ，ｌｖ，ｌ
ｗ）と、 上記第１リードワイヤの一方に直列接続され、上記無整
流子電動機（１００）の２個の固定子巻線間に設置され
て、それら固定子巻線から発生する温度が所定温度以上
になると、上記第１リードワイヤの一方と制御部（２０
０）との接続を遮断するサーマルプロテクタ（３００）
と、から構成されたことを特徴とする無整流子電動機の
過熱防止装置。1. A three-phase stator winding (Wu, Wv, Ww)
And the frequency and voltage of the input single-phase power supply (400) are converted into a three-phase power supply (U, V, W), and the above-described non-commutator motor (10).
0), a first lead wire (l 1 , l 2 ) connecting the single-phase power supply (400) and the control section (200), and the non-commutator motor (100). And the control unit (200)
And three second lead wires (lu, lv, l
w) is connected in series to one of the first lead wires and is installed between two stator windings of the non-commutator motor (100), and a temperature generated from the stator windings is a predetermined temperature. Then, one of the first lead wires and the control unit (20
Thermal protector (300) that cuts off connection with 0)
And a device for preventing overheating of the commutatorless motor.
換し無整流子電動機（１００）に印加する制御部（２０
０）と、上記無整流子電動機（１００）の温度を感知す
るサーマルプロテクタ（３００）とを含んで構成され、
該サーマルプロテクタ（３００）の温度感知結果により
上記無整流子電動機（１００）の駆動を停止させる無整
流子電動機の過熱防止装置において、 上記サーマルプロテクタ（３００）は、上記無整流子電
動機（１００）の２個の固定子巻線間に設けられ、該サ
ーマルプロテクタ（３００）の温度感知結果により上記
制御部（２００）に入力する単相電源を遮断することを
特徴とする無整流子電動機の過熱防止装置。2. A control unit (20) for converting a single-phase power supply to a three-phase power supply (U, V, W) and applying the same to a non-commutator motor (100).
0), and a thermal protector (300) for sensing the temperature of the non-commutator motor (100),
An overheating prevention device for a commutatorless motor that stops driving the commutatorless motor (100) based on a temperature detection result of the thermal protector (300), wherein the thermal protector (300) includes the motor (100). Characterized in that a single-phase power supply input to the control unit (200) is cut off based on a temperature sensing result of the thermal protector (300). Prevention device.
上記２つの固定子巻線中高温の固定子巻線側の温度を検
出することを特徴とする請求項１、又は２に記載の無整
流子電動機の過熱防止装置。3. The thermal protector (300)
The overheat prevention device for a non-commutator motor according to claim 1 or 2, wherein a high temperature of the stator winding side in the two stator windings is detected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR52796/1996 | 1996-11-08 | ||
| KR1019960052796A KR100202598B1 (en) | 1996-11-08 | 1996-11-08 | Superheat protection apparatus for brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10145961A true JPH10145961A (en) | 1998-05-29 |
Family
ID=19481163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9307499A Pending JPH10145961A (en) | 1996-11-08 | 1997-11-10 | Overheat preventive device for commutatorless motor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH10145961A (en) |
| KR (1) | KR100202598B1 (en) |
| AU (1) | AU741189B2 (en) |
| TW (1) | TW355862B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009050096A (en) * | 2007-08-21 | 2009-03-05 | Nidec Shibaura Corp | Brushless mold motor |
| US20160164384A1 (en) * | 2014-12-05 | 2016-06-09 | Nidec Motor Corporation | Stator winding thermal protector support |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA747514A (en) * | 1962-04-06 | 1966-11-29 | Westinghouse Electric Corporation | Overtemperature protected apparatus |
| US3569781A (en) * | 1968-12-30 | 1971-03-09 | Texas Instruments Inc | Motor protection circuit |
| US3646396A (en) * | 1970-07-22 | 1972-02-29 | Bodine Electric Co | Overload protection system for dc motors |
-
1996
- 1996-11-08 KR KR1019960052796A patent/KR100202598B1/en not_active IP Right Cessation
-
1997
- 1997-10-29 TW TW086116015A patent/TW355862B/en active
- 1997-11-06 AU AU44369/97A patent/AU741189B2/en not_active Ceased
- 1997-11-10 JP JP9307499A patent/JPH10145961A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009050096A (en) * | 2007-08-21 | 2009-03-05 | Nidec Shibaura Corp | Brushless mold motor |
| US20160164384A1 (en) * | 2014-12-05 | 2016-06-09 | Nidec Motor Corporation | Stator winding thermal protector support |
| US10027198B2 (en) * | 2014-12-05 | 2018-07-17 | Nidec Motor Corporation | Stator winding thermal protector support |
Also Published As
| Publication number | Publication date |
|---|---|
| AU741189B2 (en) | 2001-11-22 |
| KR19980034662A (en) | 1998-08-05 |
| KR100202598B1 (en) | 1999-06-15 |
| AU4436997A (en) | 1998-05-14 |
| TW355862B (en) | 1999-04-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20020611 |