JPS62104453A - Temperature detector for rotor - Google Patents
Temperature detector for rotorInfo
- Publication number
- JPS62104453A JPS62104453A JP60243070A JP24307085A JPS62104453A JP S62104453 A JPS62104453 A JP S62104453A JP 60243070 A JP60243070 A JP 60243070A JP 24307085 A JP24307085 A JP 24307085A JP S62104453 A JPS62104453 A JP S62104453A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- rotor
- temperature
- magnetic
- magnetic flux
- 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
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
【発明の詳細な説明】
［イと明の技術分野］
本発明は、回転子の温度を非接触手段により検出てきる
ようにした回転子の温度検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION [TECHNICAL FIELD] The present invention relates to a rotor temperature detection device that is capable of detecting the temperature of a rotor by non-contact means.
［発明の技術的背景とその問題点］
近年においては、例えはインバータ装置を用いて誘導電
動機を可変速運転することが広く行なわれているが、斯
様なｉ−＋Ｊ変速制御を緻密に行なう必要かある場合に
は、その１１Ｓ弯速制御」−の定数を回転ｒ−の巻線イ
ンピーダンスに応じて最適に設定するようにしている。[Technical background of the invention and its problems] In recent years, variable speed operation of induction motors using, for example, an inverter device has been widely practiced, but it is difficult to precisely perform such i-+J speed change control. If necessary, the constant of the 11S bending speed control is optimally set according to the winding impedance of the rotation r-.
しかるに、回転子の巻線インピーダンスは回転−ｒ−の
？！４度に応じて変化する性質かあり、しかも回転子の
温ｒ＝は誘ｙｑ電動機の運転状態その他の影響によって
高１１（変化することか避けられないものであるから、
誘導電動機のＩＩｆ変速運転をより一層緻密に行なう場
合には、前記ＩＩｆ弯速制御トの定数を回転子の温ｙｆ
ｔに応じて変化させてやる必要かあり、従ってこの場合
には、回転ｒの温度を非接触状態にて検出できる装置が
必要となる。しかしながら、従来においては回転子の温
度を非接触状態で検出できる装置が存在せず、斯様な装
置の出現か望まれていた。However, the winding impedance of the rotor is -r-? ! There is a property that it changes according to the temperature of 4 degrees, and the rotor temperature r= is high 11 (varies or is unavoidable) depending on the operating condition of the induction motor and other influences,
When performing IIf variable speed operation of the induction motor more precisely, the constant of the IIf speed control is set to the rotor temperature yf.
Therefore, in this case, a device that can detect the temperature of the rotation r in a non-contact manner is required. However, in the past, there was no device that could detect the temperature of the rotor in a non-contact manner, and the development of such a device was desired.
［発明の目的］
本発明は上記′Ｊｉ情に鑑みてなされたものであり回転
ｒの温度を非接触状態にて確実に検出することかできる
新規な回転子の７！＋を度検出装置を提供するにある。[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and provides a novel rotor that can reliably detect the temperature of the rotation r in a non-contact state. + to provide a degree detection device.
［発明の概°汐］
本発明は１１１已目的を達成するために、永久磁イ１の
発生磁束密面かその７１す度に応じて変化するという性
質を利用して回転子の温度を検出するように１７たちの
であり、特には永久磁石を回転子鉄心に利して伝熱的に
固イへし、この永久磁石の一極との間に所定の空隙を存
した状態で磁性体を配置し、他極を磁性体に固着してこ
れら永久磁石、空１シ；ミ及びｆｌｉ＆性体を介した磁
気回路を形成し、さらに−１−記空隙にその空隙内の磁
束計を検出する磁気検出索ｒを設け、この磁気険出素γ
−の出力変化に基づいて同転ｒ−鉄心ひいては回転子の
温度を検出する構成としたものである。[Summary of the Invention] In order to achieve the 111th objective, the present invention detects the temperature of the rotor by utilizing the property that the generated magnetic flux density surface of the permanent magnet 1 changes according to its degree. In particular, a permanent magnet is used as a rotor core to make it thermally solid, and a magnetic material is inserted with a predetermined gap between it and one pole of the permanent magnet. and the other pole is fixed to a magnetic body to form a magnetic circuit through these permanent magnets, the air 1; A magnetic detection line r is provided, and this magnetic protrusion element γ
- The configuration is such that the temperature of the co-rotating r-iron core and eventually of the rotor is detected based on the change in the output of -.
［発明の実施例］
以ド、本発明の一実施例について図面を参照しながら説
明する。[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図において、１は電動機のフレームで、その内周に
は固定ｊ’ 鉄心２かｂ’＆ ；°″１１固定ｉている
。In FIG. 1, reference numeral 1 denotes a frame of an electric motor, and on its inner periphery a fixed iron core 2 or b'&;°''11 is fixed.
３はフレーム１内に図示１＝ １よい軸受を介（７てｋ
ｌ、’ｒされた回転子で、鉄°５の６子番性＋４１１１
に−（＋ｉη成さイ′］だ回転−ｒ軸３ａの略中央部に
鉄心３が１１ヨ成され、その両端にはアルミ“りの磁気
抵抗か１ｔ：１い＋」料により構成されたエンドリンク
３ｃを＜ｊ ｔ−ている。４は円盤状をなす第１の磁性
体で、この第１のＩｉｆ＆ ｔ’１体４は、その中央部
に形成されたμ通孔４ａに対して前記回転子軸３ａか目
通された状態にて、回転ｒ３におけるエンドリング３Ｃ
の軸方向端面にこれと接するようにｔｉ’ｉ１着されて
いる。５は第１の磁性体４と同径の環状をなし１１つそ
の軸方向へ均一に着磁された永久磁石で、これはＬ記第
１の磁性体４の端面に回転子軸３ａと同心状に固イ１１
され、以て回転子鉄心３ｂに対して伝熱的に設けられて
いる。６は永久磁石５と同径の円盤状をなす第２の磁性
体で、この第２の磁性体６は、その中央部に形成された
μ通孔６ａに対して前記回転ｒ軸３ａか１通された状態
にて回転子軸３ａの周囲に固着されており、その固イ“
１状態で永久磁石５との間に所定の空隙７が存するよう
に構成されている。3 is shown in the frame 1 1 = 1 through a good bearing (7
l, 'r rotor, iron degree 5 6 child number +4111
An iron core 3 is formed approximately at the center of the r-axis 3a, and both ends thereof are made of magnetically resistive aluminum material. The end link 3c is <j t-. 4 is a disk-shaped first magnetic body, and this first Iif&t'1 body 4 is inserted into the μ through hole 4a formed in its center. In the state where the rotor shaft 3a is passed through, the end ring 3C at rotation r3
ti'i1 is attached to the axial end surface of the axial direction so as to be in contact with this. Reference numeral 5 designates 11 annular permanent magnets having the same diameter as the first magnetic body 4 and uniformly magnetized in the axial direction. 11
The rotor core 3b is provided so as to be thermally conductive with respect to the rotor core 3b. Reference numeral 6 denotes a disk-shaped second magnetic body having the same diameter as the permanent magnet 5, and this second magnetic body 6 is connected to the rotating r-axis 3a or It is fixed around the rotor shaft 3a in the state where it is passed through, and its fixed "
It is configured such that a predetermined air gap 7 exists between it and the permanent magnet 5 in one state.
このように構成された結果、永久磁石５．第１の磁性体
４．回転子軸３ａ、第２の磁性体６及び空隙７を介した
磁気回路（第１図に二点鎖線Ａで示す）か形成されるも
のであり、このときには前述したように永久磁石５がそ
の軸方向に均一に着磁されているから、空隙７内には均
一磁界が形成されるようになる。As a result of this configuration, the permanent magnet 5. First magnetic body 4. A magnetic circuit (indicated by the two-dot chain line A in FIG. 1) is formed through the rotor shaft 3a, the second magnetic body 6, and the air gap 7, and at this time, as described above, the permanent magnet 5 is connected to the magnetic circuit. Since it is uniformly magnetized in the axial direction, a uniform magnetic field is formed within the air gap 7.
一ノＪ°、８はフレーム１の内側面に立設された支持板
で、その先端が前記空隙７内まで延出されている。９は
磁気検出素子たるホール素子で、これは支持板８の先端
に対して空隙７内に位置するように取着され、以てその
空隙７内の磁束量ひいては永久磁石５の磁束量を検出す
るように設けられている。Reference numeral 8 denotes a support plate erected on the inner surface of the frame 1, the tip of which extends into the space 7. Reference numeral 9 denotes a Hall element as a magnetic detection element, which is attached to the tip of the support plate 8 so as to be located within the air gap 7, and thereby detects the amount of magnetic flux within the air gap 7 and, in turn, the amount of magnetic flux of the permanent magnet 5. It is set up to do so.
次に１−記構成の作用について説明する。回転子３ひい
ては回転子鉄心３ｂの温度変化は第１の磁性体４を介し
て永久磁石５に伝えられる。このとき、永久磁石５の磁
束量は、第２図に示すようにその温度に応じて反比例的
に変化するいう性質を白°するものであり、斯様な温度
特性の勾配は永久磁石５の祠質によって一義的に定まる
。従って、空隙７内の磁束量は、回転子３の温度に対し
て反比例的に変化することになる。一方、ホール素ｒ−
９は、空隙７内の磁束量に比例した検出Ｔ＋ｓ＋１＜ホ
ール電圧）を出力するようになるから、その検出電圧は
第３図に示すように回転子３のｌＡ！ ＩＱ：に対して
反比例的に変化するようになり、活用的にホール索子９
から出力される検出型ＩＩ：の変化に」、（づいて回転
子３の温度を非接触状態で検出することかできる。Next, the operation of configuration 1- will be explained. Temperature changes in the rotor 3 and thus in the rotor core 3b are transmitted to the permanent magnets 5 via the first magnetic body 4. At this time, the magnetic flux of the permanent magnet 5 has the property of changing inversely proportionally to its temperature as shown in FIG. Uniquely determined by the quality of the shrine. Therefore, the amount of magnetic flux within the air gap 7 changes in inverse proportion to the temperature of the rotor 3. On the other hand, the hole element r-
9 outputs a detected voltage T+s+1<Hall voltage which is proportional to the amount of magnetic flux in the air gap 7, so the detected voltage is 1A! of the rotor 3 as shown in FIG. IQ: began to change in inverse proportion to
The temperature of the rotor 3 can be detected in a non-contact manner based on the change in detection type II outputted from the sensor.
尚、１−記実施例では、軸）ｊ向に着に１’ｉした環状
の永久磁石５を用いたが、これに限られるものではなく
、例えば径ツノ向に均一に６磁した環状の永久磁石を回
転軸３ａに対して同心的に取付け、さらにこの永久磁石
の周囲に空隙を自゛シて環状磁性体を同心的に設けて磁
性体により回転軸に固定し、永久磁石、磁性体及び空隙
を介した磁気回路を形成し、斯かる空隙に磁気検出素子
を配置する構成としても良いものである。Incidentally, in Example 1-1, an annular permanent magnet 5 with 1′ i magnetized in the axis) j direction was used, but the present invention is not limited to this. A permanent magnet is attached concentrically to the rotating shaft 3a, and an annular magnetic body is provided concentrically with a gap around the permanent magnet, and the permanent magnet and the magnetic body are fixed to the rotating shaft by the magnetic body. A magnetic circuit may be formed through a gap, and a magnetic detection element may be arranged in the gap.
［発明の効ｌＡ！ ］
本発明によれは以１．の説明によって明らかなように、
回転子の温度を非接触状態にて確実に検出することカビ
Ｃきるという従来にはなかった新規な動車を奏するもの
である。[Efficacy of invention lA! ] According to the present invention, the following 1. As is clear from the explanation of
The rotor temperature can be reliably detected in a non-contact manner, making it possible to eliminate the mold temperature, which is a novel feature that has not existed in the past.
図面は本発明の一実施例を示すもので、第１図は電動機
の部分断面図、第２図は永久磁石の温度時（’１図、第
３図は回転子温度と磁気検出素子の険？＋１ ；ｉｆ
１１．との関係を示す特性図である。
図中、１はフレーム、３は回転子、３ａは回転ｒ軸、３
ｂは回転ｒ−鉄心、４は第１の磁性体、５は永久磁イ１
．６は第２の磁性体、７は空隙、９はホール索ｒ（磁気
検出索Ｊ’）を示す。
出願人 株式会社 東 芝
第１図The drawings show one embodiment of the present invention, and Fig. 1 is a partial sectional view of the electric motor, and Fig. 2 shows the temperature of the permanent magnet (Fig. ?+1 ;if
11. FIG. In the figure, 1 is a frame, 3 is a rotor, 3a is a rotating r-axis, 3
b is a rotating r-iron core, 4 is a first magnetic body, 5 is a permanent magnet 1
．． 6 is a second magnetic body, 7 is an air gap, and 9 is a Hall cable r (magnetic detection cable J'). Applicant Toshiba Corporation Figure 1
Claims (1)
、この永久磁石の一極に対して所定の空隙を存するよう
に配置され他極に対して固着あるいは接触されてその永
久磁石を介した磁気回路を形成する磁性体と、前記空隙
にその空隙内の磁束量を検出するように配置された磁気
検出素子とを備え、温度上昇に伴って変化する前記永久
磁石の磁束量を前記磁気検出素子により検出し、この出
力変化に基づいて前記回転子鉄心の温度を検出するよう
に構成したことを特徴とする回転子の温度検出装置。1. A permanent magnet that is thermally fixed to the rotor core, and a permanent magnet that is arranged with a predetermined gap between one pole of the permanent magnet and fixed or in contact with the other pole. and a magnetic detection element disposed in the air gap to detect the amount of magnetic flux in the air gap, and detect the amount of magnetic flux of the permanent magnet that changes with temperature rise. A rotor temperature detection device characterized in that the temperature of the rotor core is detected by the magnetic detection element and the temperature of the rotor core is detected based on the output change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60243070A JPS62104453A (en) | 1985-10-30 | 1985-10-30 | Temperature detector for rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60243070A JPS62104453A (en) | 1985-10-30 | 1985-10-30 | Temperature detector for rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62104453A true JPS62104453A (en) | 1987-05-14 |
Family
ID=17098337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60243070A Pending JPS62104453A (en) | 1985-10-30 | 1985-10-30 | Temperature detector for rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62104453A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994001920A1 (en) * | 1992-07-09 | 1994-01-20 | Seiko Epson Corporation | Brushless motor |
| JP2007336708A (en) * | 2006-06-15 | 2007-12-27 | Nissan Motor Co Ltd | Temperature detection apparatus for permanent magnet of permanent-magnetic rotating machine |
| WO2017110442A1 (en) * | 2015-12-25 | 2017-06-29 | 日立オートモティブシステムズ株式会社 | Control device for electric motor, and electric brake device |
| CN112448546A (en) * | 2019-09-04 | 2021-03-05 | Tdk株式会社 | Magnet temperature information output device and rotating electrical machine |
-
1985
- 1985-10-30 JP JP60243070A patent/JPS62104453A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994001920A1 (en) * | 1992-07-09 | 1994-01-20 | Seiko Epson Corporation | Brushless motor |
| CN1034040C (en) * | 1992-07-09 | 1997-02-12 | 精工爱普生株式会社 | Brushless motor |
| JP2007336708A (en) * | 2006-06-15 | 2007-12-27 | Nissan Motor Co Ltd | Temperature detection apparatus for permanent magnet of permanent-magnetic rotating machine |
| WO2017110442A1 (en) * | 2015-12-25 | 2017-06-29 | 日立オートモティブシステムズ株式会社 | Control device for electric motor, and electric brake device |
| CN112448546A (en) * | 2019-09-04 | 2021-03-05 | Tdk株式会社 | Magnet temperature information output device and rotating electrical machine |
| JP2021039019A (en) * | 2019-09-04 | 2021-03-11 | Tdk株式会社 | Magnet temperature information output device and rotation electrical machinery |
| US11728712B2 (en) | 2019-09-04 | 2023-08-15 | Tdk Corporation | Magnet temperature information output device and rotating electrical machine |
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