JPH0554075B2 - - Google Patents
Info
- Publication number
- JPH0554075B2 JPH0554075B2 JP59061017A JP6101784A JPH0554075B2 JP H0554075 B2 JPH0554075 B2 JP H0554075B2 JP 59061017 A JP59061017 A JP 59061017A JP 6101784 A JP6101784 A JP 6101784A JP H0554075 B2 JPH0554075 B2 JP H0554075B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- short circuit
- voltmeter
- multipolar
- detection
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 31
- 239000003990 capacitor Substances 0.000 claims description 8
- 239000004020 conductor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
【発明の詳細な説明】
本発明は、多極型コイルの導線間の短絡の有無
を検出する装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting the presence or absence of a short circuit between conducting wires of a multipolar coil.
従来、一般的なコイルの短絡の有無を測定する
場合、装置として、抵抗計、LCRメーター、絶
縁試験器を用いて、電気抵抗、インダクタンス、
部分放電等を測定する事によつて行なわれてき
た。 Conventionally, when measuring the presence or absence of a short circuit in a general coil, a resistance meter, LCR meter, or insulation tester was used as the equipment to measure electrical resistance, inductance,
This has been done by measuring partial discharge, etc.
しかし、抵抗計、LCRメーターを用いて、電
気抵抗、インダクタンス等を測定する方法は、こ
れら電気的特性の短絡による変化が小さく、導線
形状のバラツキ、分布容量のバラツキ及び温度変
化等の影響により、その測定値はバラツキを有す
るものとなり、１〜２個程度の短絡の検出は困難
であり、また絶縁試験器を用いた部分放電試験に
よる測定は、コイルが致命的に破損される恐れが
あつた。 However, in the method of measuring electrical resistance, inductance, etc. using a resistance meter or LCR meter, changes in these electrical characteristics due to short circuits are small, and due to the effects of variations in the shape of the conductor, variations in distributed capacitance, temperature changes, etc. The measured values would vary, making it difficult to detect one or two short circuits, and measuring by a partial discharge test using an insulation tester could cause fatal damage to the coil. .
また、以上述べた方法は、いずれも、コイル端
子に測定機器を接続する方法であり、コイル全体
の特性を測定するものであり、短絡個所を特定す
る事はできない。 In addition, all of the methods described above involve connecting a measuring device to the coil terminals and measure the characteristics of the entire coil, and cannot identify short-circuit locations.
本発明者らは、多極型コイル、特に、コイル全
体の半径30mm以下、厚み20mm以下のシート状コイ
ルの極毎の短絡の有無を検出する事が可能な装置
について検討を行つた結果、交流高周波発振器、
検出用コイルまたは検出コイルとコンデンサーと
からなる共振器、及び電圧計よりなる検出装置が
有効であることを見い出し、本発明を完成した。 The present inventors have investigated a device capable of detecting the presence or absence of a short circuit for each pole of a multi-polar coil, particularly a sheet-like coil with a total coil radius of 30 mm or less and a thickness of 20 mm or less. high frequency oscillator,
The inventors have discovered that a detection device consisting of a detection coil or a resonator consisting of a detection coil and a capacitor, and a voltmeter is effective, and have completed the present invention.
即ち、本発明の第１の発明は、100キロヘルツ
〜１メガヘルツの交流高周波発振器、検出用コイ
ル及び電圧計からなる多極型コイルの短絡を極毎
に検出するコイル短絡検出装置であり、第２の発
明は、上記高周波発振器、検出用コイルとコンデ
ンサーとからなる共振器及び電圧計とからなる多
極型コイルの短絡を極毎に検出するコイル短絡検
出装置である。 That is, the first aspect of the present invention is a coil short circuit detection device that detects short circuits for each pole in a multipolar coil consisting of a 100 kilohertz to 1 megahertz AC high frequency oscillator, a detection coil, and a voltmeter; The present invention is a coil short-circuit detection device that detects short-circuits of a multipolar coil consisting of the above-mentioned high-frequency oscillator, a resonator consisting of a detection coil and a capacitor, and a voltmeter for each pole.
本発明のコイル短絡検出装置は、多極型コイ
ル、特に小型、かつ薄型である多極型コイルの極
毎の短絡の有無を高感度に検出することが可能で
あり、実用上極めて有効なものである。 The coil short circuit detection device of the present invention is capable of highly sensitively detecting the presence or absence of a short circuit in each pole of a multipolar coil, especially a small and thin multipolar coil, and is extremely effective in practice. It is.
以下、本発明を詳細に説明する。 The present invention will be explained in detail below.
本発明に使用される高周波発振器は、100キロ
ヘルツ〜１メガヘルツの交流高周波電流を流す発
振器であり、RC発振器でよいが、周波数安定性
に優れたものが好ましい。 The high frequency oscillator used in the present invention is an oscillator that flows an alternating high frequency current of 100 kilohertz to 1 megahertz, and may be an RC oscillator, but one with excellent frequency stability is preferable.
本発明に使用される検出用コイルは、導線を、
10〜100ターン円筒状に巻いたものを用い、円筒
の直径は、被測定コイルの極より小さく、特に、
極の径の1/2〜1/3が好ましい。 The detection coil used in the present invention includes a conductor wire,
The diameter of the cylinder is smaller than the pole of the coil to be measured.
It is preferably 1/2 to 1/3 of the diameter of the pole.
本発明の第２の発明に使用される共振器は、上
記検出用コイルとコンデンサーが並例に組合わせ
られたものであり、使用されるコンデンサーとし
ては、セラミツクスコンデンサー等周波数特性の
良いコンデンサーを使用する。 The resonator used in the second invention of the present invention is a combination of the above detection coil and a capacitor, and the capacitor used is a capacitor with good frequency characteristics such as a ceramic capacitor. do.
本発明に使用される電圧計は、高周波特性の優
れた交流電圧計が好ましい。 The voltmeter used in the present invention is preferably an AC voltmeter with excellent high frequency characteristics.
本発明のコイル短絡検出装置は、前記高周波発
振器からなる電源部と、前記検出用コイルと電圧
計とからなる短絡検出部または共振器と電圧計と
からなる短絡検出部とから構成されている。 The coil short circuit detection device of the present invention includes a power supply section including the high frequency oscillator, and a short circuit detection section including the detection coil and a voltmeter, or a short circuit detection section including a resonator and a voltmeter.
本発明のコイル短絡検出装置の検出の対象とな
る多極型コイルの一例は、第１図に示すように、
巻線パターンを形成した導線１が、絶縁体３の溝
に設置され、導線１の端末部２より裏面に続き、
該裏面で再び巻線パターンが形成され、順次、次
の極へと続いたものである。 An example of a multipolar coil to be detected by the coil short circuit detection device of the present invention is as shown in FIG.
A conductive wire 1 with a winding pattern formed thereon is installed in a groove of an insulator 3, and continues from the terminal portion 2 of the conductive wire 1 to the back surface,
A winding pattern is formed again on the back side and continues to the next pole in sequence.
本発明のコイル短絡検出装置を用いて多極型コ
イルの短絡を検出する方法は、第２図に示すよう
に、高周波発振器６を多極型コイル１０の端子１
１に接続したのち、発振器６から交流高周波電流
を多極型コイル１０に流すと、該コイルの全極に
高周波磁場が発生する。ついで、検出用コイル７
または該検出用コイル７とコンデンサー９とより
なる共振器を、各極毎に、一定の距離に接近させ
ると検出コイル７または共振器に起電力が発生
し、この起電力を電圧計８により読み取る事によ
つて、磁場の強度を測定する。もし、各極毎の測
定時に、第１図に示すように、短絡部分４が存在
する場合、該短絡部分４と導線１の太線部分５と
によりループが形成され、該ループを貫く磁場の
時間変化によつてループに電流が流れ、この電流
によつて、極に発生する磁場とは逆方向の磁場が
発生して磁場を弱くする結果となるので、検出用
コイル７に発生する起電力は弱くなり、電圧計８
に示される電圧も低下する。この変化を読み取る
ことにより短絡を検出する。この際、高周波発振
器６から流される交流電流の周波数は、高い程そ
の検出効果は顕著となり、十分な検出効果を得る
為には、100キロヘルツ以上である事が必要であ
る。またコイルの分布容量のばらつきの影響を小
さくする為には、周波数をコイルの固有共振周波
数より低くする必要があるが、本発明が対象とす
るコイルの場合には、１メガヘルツ以下であれば
可能である。また、本発明の第２の発明のよう
に、検出用コイル７にコンデサー９を並列に付加
した共振器を用いた場合、共振器の共鳴周波数で
測定を行なうことにより、検出用コイルに発生す
る起電力を高め、更に、短絡による共鳴周波数の
ズレをも利用して、一層の高感度な検出ができ好
ましい。 A method for detecting a short circuit in a multipolar coil using the coil short circuit detection device of the present invention is as shown in FIG.
1, when an AC high frequency current is passed from the oscillator 6 to the multipolar coil 10, a high frequency magnetic field is generated at all poles of the coil. Next, the detection coil 7
Alternatively, when a resonator consisting of the detection coil 7 and the capacitor 9 is brought close to each other at a certain distance for each pole, an electromotive force is generated in the detection coil 7 or the resonator, and this electromotive force is read by the voltmeter 8. Depending on the situation, the strength of the magnetic field is measured. If a short-circuit portion 4 exists as shown in FIG. 1 when measuring each pole, a loop is formed by the short-circuit portion 4 and the thick line portion 5 of the conductor 1, and the time of the magnetic field passing through the loop is Due to the change, a current flows in the loop, and this current generates a magnetic field in the opposite direction to the magnetic field generated at the pole, weakening the magnetic field, so the electromotive force generated in the detection coil 7 is It becomes weak and the voltmeter 8
The voltage shown in also decreases. A short circuit is detected by reading this change. At this time, the higher the frequency of the alternating current flowing from the high-frequency oscillator 6, the more pronounced the detection effect becomes, and in order to obtain a sufficient detection effect, the frequency needs to be 100 kilohertz or more. In addition, in order to reduce the influence of variations in the distributed capacitance of the coil, it is necessary to lower the frequency than the natural resonance frequency of the coil, but in the case of the coil targeted by the present invention, it is possible as long as it is 1 MHz or less. It is. In addition, when a resonator in which a condenser 9 is added in parallel to the detection coil 7 is used as in the second aspect of the present invention, by measuring at the resonant frequency of the resonator, the This is preferable because it increases the electromotive force and further utilizes the shift in resonance frequency caused by the short circuit to enable even more sensitive detection.
また、検出用コイルの芯としてフエライト等の
コアを使い、コイルに発生する起電力を高める事
も可能である。 It is also possible to use a core made of ferrite or the like as the core of the detection coil to increase the electromotive force generated in the coil.
第１図は、検査の対象となる多極型コイルの一
例を示す平面図、第２図は、本発明のコイル検出
装置を用いて短絡の有無を検出する場合の一例を
示すブロツク図である。
図中；１は導線、２は端末部、３は絶縁体、４
は短絡部分、５は導線の一部、６は高周波発振
器、７は検出用コイル、８は電圧計、９はコンデ
ンサー、１０は多極型コイル、１１は端子を示
す。
FIG. 1 is a plan view showing an example of a multipolar coil to be inspected, and FIG. 2 is a block diagram showing an example of detecting the presence or absence of a short circuit using the coil detection device of the present invention. . In the diagram; 1 is the conductor, 2 is the terminal, 3 is the insulator, 4
5 is a short-circuited part, 5 is a part of a conducting wire, 6 is a high-frequency oscillator, 7 is a detection coil, 8 is a voltmeter, 9 is a capacitor, 10 is a multipolar coil, and 11 is a terminal.
Claims (1)
電流を流す高周波発振器、検出用コイル及び電圧
計からなり、該発振器からの電流を多極型コイル
に流して該多極型コイルに磁場を発生させ、この
磁場の強さを検出用コイルに発生する起電力とし
て取り出し、この起電力を電圧計により測定し、
電圧を変化により多極型コイルの短絡の有無を極
毎に検出することを特徴とするコイル短絡検出装
置。 ２ 100キロヘルツ〜１メガヘルツの交流高周波
電流を流す発振器、検出用コイルとコンデンサー
からなる共振器及び電圧計よりなり、該発振器よ
り発生した電流を多極型コイルに流すことにより
該多極型コイルに磁場を発生させ、この磁場の強
さを共振器に発生する起電力として取出し、この
起電力を電圧計により測定し、電圧計の電圧の変
化により多極型コイルの短絡の有無を極毎に検出
することを特徴とするコイル短絡検出装置。[Claims] 1. Consists of a high-frequency oscillator that sends an alternating high-frequency current of 100 kilohertz to 1 megahertz, a detection coil, and a voltmeter, and the current from the oscillator is passed through a multipolar coil to create a magnetic field in the multipolar coil. is generated, the strength of this magnetic field is extracted as the electromotive force generated in the detection coil, and this electromotive force is measured with a voltmeter.
A coil short circuit detection device characterized by detecting the presence or absence of a short circuit in a multipolar coil for each pole by changing the voltage. 2 Consists of an oscillator that flows an alternating high frequency current of 100 kilohertz to 1 megahertz, a resonator consisting of a detection coil and a capacitor, and a voltmeter, and the current generated by the oscillator is passed through the multipolar coil to cause the current to flow through the multipolar coil. A magnetic field is generated, the strength of this magnetic field is extracted as the electromotive force generated in the resonator, this electromotive force is measured with a voltmeter, and the presence or absence of a short circuit in the multipolar coil can be determined for each pole by changes in the voltage of the voltmeter. A coil short circuit detection device characterized by detecting a coil short circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59061017A JPS60205267A (en) | 1984-03-30 | 1984-03-30 | Detector for short-circuiting in coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59061017A JPS60205267A (en) | 1984-03-30 | 1984-03-30 | Detector for short-circuiting in coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60205267A JPS60205267A (en) | 1985-10-16 |
| JPH0554075B2 true JPH0554075B2 (en) | 1993-08-11 |
Family
ID=13159131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59061017A Granted JPS60205267A (en) | 1984-03-30 | 1984-03-30 | Detector for short-circuiting in coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60205267A (en) |
-
1984
- 1984-03-30 JP JP59061017A patent/JPS60205267A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60205267A (en) | 1985-10-16 |
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