JPS5915863A - Apparatus for measuring field curent of brushless synchronous machine - Google Patents
Apparatus for measuring field curent of brushless synchronous machineInfo
- Publication number
- JPS5915863A JPS5915863A JP57126566A JP12656682A JPS5915863A JP S5915863 A JPS5915863 A JP S5915863A JP 57126566 A JP57126566 A JP 57126566A JP 12656682 A JP12656682 A JP 12656682A JP S5915863 A JPS5915863 A JP S5915863A
- Authority
- JP
- Japan
- Prior art keywords
- field current
- synchronous machine
- brushless synchronous
- pickup
- rectifier
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、ブラシレス同期機の界磁電流計測装置、特
に固定側忙界磁電流検出用ピックアップを設けたものに
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a field current measuring device for a brushless synchronous machine, and particularly to one provided with a fixed-side busy field current detection pickup.
ブラシレス同期機の界磁電流を計測するため、従来多く
の提案がなされ、特にFM遠隔測定方式が良く知られて
いる。この従来の方式は、界磁巻線に流れる電流を直接
計測し、回転子軸上に設置したFM送信機で信号変換し
、固定側に設置した受信アンテナを通して計測9表示す
るものである。In order to measure the field current of a brushless synchronous machine, many proposals have been made in the past, and the FM telemetry method is particularly well known. In this conventional method, the current flowing through the field winding is directly measured, the signal is converted by an FM transmitter installed on the rotor shaft, and the measurement is displayed through a receiving antenna installed on the fixed side.
しかし、この方法によると、高速回転する回転子軸に界
磁電流検出用ピックアップ及び送信機を積載するので、
その積載装置の強度の問題等による界磁電流計測の信頼
性の低下なきたす弊害があり、またコスト的にも高価な
ものとなっていた。However, according to this method, the field current detection pickup and transmitter are mounted on the rotor shaft, which rotates at high speed.
Problems with the strength of the loading device have the disadvantage of lowering the reliability of field current measurement, and the cost is also high.
この発明は、上記のような欠点を除去するためになされ
たもので、ブラシレス同期機の界磁電流を、固定側に設
置した界磁電流検出用ピックアップで検出することによ
り、回転子軸内に計測装置を一切積載することなく、ブ
ラシレス同期機の界磁電流を計測できる装置を提供する
ことを目的としている。This invention was made to eliminate the above-mentioned drawbacks, and by detecting the field current of a brushless synchronous machine with a field current detection pickup installed on the stationary side, it is possible to detect the field current within the rotor shaft. The purpose of this invention is to provide a device that can measure the field current of a brushless synchronous machine without installing any measuring equipment.
以下、この発明の一実施例について説明する。An embodiment of the present invention will be described below.
第1図には、この発明の界磁電流計測装置を備えタフラ
シレス同期機を示I−だ。/はブラシレス同期機の固定
電機子であり、λはブラシレス同期機の回転子軸であり
、この回転子軸コっまり回転子側には、ブラシレス同期
機の界磁巻線、?、交流励磁機の電機子グ、整流器3お
よび副励磁機の界磁巻線6が設けられている。交流励磁
機の電機子弘に誘起した出力は整流器3で整流され、直
流の界磁電流として接続導体7を流れ、ブラシレス同期
機の界磁巻線3に送られる。また固定側には交流励磁機
の界磁巻線ざ、副励磁機の電機子デおよび自動電圧調整
装置(AVR) /θが設けてあり、副励磁機の電機子
デの出力はkVRloで所望の値に調整され、kVRl
oの出力によって交流励磁機の界磁巻線tは励磁される
。以上がブラシレス同期機の構成である。この発明では
、ブラシレス同期機の界磁巻線3に流れる界磁電流を固
定側から検出するために、界磁電流検出用ピックアップ
//、波形処理回路12および電流計13から成る界磁
電流計測装置を設ける。しかも、半円形の界磁電流検出
用ピックアップl/は、ブラシレス同期機の回転子軸2
に対しである一定の間隔をおいて部分的に取り囲むよう
に設けられ、また波形処理回路/2を介して電流計/3
に接続されている。FIG. 1 shows a tough brushless synchronous machine equipped with the field current measuring device of the present invention. / is the fixed armature of the brushless synchronous machine, λ is the rotor shaft of the brushless synchronous machine, and the field winding of the brushless synchronous machine, ? , an armature of the AC exciter, a rectifier 3, and a field winding 6 of the sub-exciter. The output induced in the armature of the AC exciter is rectified by the rectifier 3, flows through the connecting conductor 7 as a DC field current, and is sent to the field winding 3 of the brushless synchronous machine. In addition, on the fixed side, the field winding of the AC exciter, the armature of the auxiliary exciter, and an automatic voltage regulator (AVR) /θ are installed, and the output of the armature of the auxiliary exciter is set at kVRlo. is adjusted to the value of kVRl
The field winding t of the AC exciter is excited by the output of o. The above is the configuration of the brushless synchronous machine. In this invention, in order to detect the field current flowing through the field winding 3 of a brushless synchronous machine from the fixed side, a field current measurement device comprising a field current detection pickup//, a waveform processing circuit 12, and an ammeter 13 is provided. Provide equipment. Moreover, the semicircular field current detection pickup l/ is the rotor shaft 2 of the brushless synchronous machine.
ammeter/3 through the waveform processing circuit/2.
It is connected to the.
第2図は、整流器夕とブラシレス同期機の界磁巻線3を
接続する接続導体7とピックアップ//の構成図を示す
。第2図においてコはブラシレス同期機の回転子軸であ
り、この回転子軸λ内の軸心に対して対称位置に接続導
体7がそれぞれ通っている。また、ピックアップ//は
ヒステリシスが少なくて透磁率の高い鋼板で作った半円
形コアllIにコイル15が等ピッチで巻かれてなり、
回転子軸コを))る一定の間隔をおいて部分的に取り囲
み、接続導体7を流れる直流電流によってピッ(3)
クアップ/lに誘起される電圧が波形処理回路lコ(第
1図参照)K送られる。FIG. 2 shows a configuration diagram of a pickup and a connecting conductor 7 that connects the rectifier and the field winding 3 of the brushless synchronous machine. In FIG. 2, reference numeral denotes the rotor shaft of the brushless synchronous machine, and connection conductors 7 pass through the rotor shaft λ at symmetrical positions with respect to the axis. In addition, the pickup // consists of a semicircular core made of a steel plate with low hysteresis and high magnetic permeability, and coils 15 wound at equal pitches.
The voltage induced at the pick-up (3) by the direct current flowing through the connecting conductor 7, which partially surrounds the rotor shaft at a certain interval (see Fig. 1), is applied to the waveform processing circuit (see Figure 1). )K sent.
次に動作について説明する。ブラシレス同期機に於いて
、接続導体りへは整流器5で整流された直流電流が流れ
る。固定側に設置されたピックアップ//には、接続導
体りに流れる直流電流に比例して増加する鎖交磁束によ
る誘起起電力が発生する。ところで、ピックアップとし
て一般には工形、凹形等のコアにコイルを巻いたものが
考えられる。しかし、このような形のコイルを用いた場
合、回転子軸の直径が大きく、また回転軸の回軸の速い
場合、接続導体りの周速が非常に速くなり、ピックアッ
プに誘起する電圧波形は立ち上りが急峻な波形となる。Next, the operation will be explained. In the brushless synchronous machine, a direct current rectified by a rectifier 5 flows through the connecting conductor. In the pickup // installed on the fixed side, induced electromotive force is generated due to interlinkage magnetic flux that increases in proportion to the direct current flowing through the connecting conductor. Incidentally, a pickup generally includes a core having a hollow or concave shape and a coil wound around it. However, when using a coil of this type, if the diameter of the rotor shaft is large and the rotation axis of the rotating shaft is fast, the circumferential speed of the connecting conductor becomes very fast, and the voltage waveform induced in the pickup becomes The waveform has a steep rise.
これを第3図に示す。第3図はピックアップに誘起する
電圧の時間的変化を示しており、Tは回転子軸の回転周
期を示している。This is shown in FIG. FIG. 3 shows temporal changes in the voltage induced in the pickup, and T indicates the rotation period of the rotor shaft.
これによると、接続導体りに流れる電流によるこの波形
の上部ピーク値が変化するので波形処理回路/コで波形
処理することにより精度の高い電流計測をすることは難
しい。一方半円形のコアに等(リ )
間隔ピッチでコイルを巻いたこの発明によるピックアッ
プl/を用いた時の発生電圧波形を第1図に示す。第1
図も第3図同様、ピックアップ/lに誘起される電圧の
時間的変化を示しているが、これは三角波形となってい
る。この三角波形は波形処理回路12例えば簡単な積分
回路等によって直流信号に変化され、変換後の直流信号
は電流計/3へ入力されて指示されることになる。According to this, since the upper peak value of this waveform changes due to the current flowing through the connecting conductor, it is difficult to perform highly accurate current measurement by processing the waveform with a waveform processing circuit. On the other hand, FIG. 1 shows the voltage waveform generated when using a pickup according to the present invention in which coils are wound around a semicircular core at equal pitches. 1st
Similar to FIG. 3, the figure also shows the temporal change in the voltage induced in the pickup /l, but it has a triangular waveform. This triangular waveform is converted into a DC signal by the waveform processing circuit 12, such as a simple integration circuit, and the converted DC signal is input to the ammeter/3 for indication.
ブラシレス同期機の界磁電流はその定格電流が/θθθ
アンペアを超えるとyもある。このような場合には、上
記実施例のピックアップでは高電流域でコアが飽和して
しまい、ブラシレス同期機の界磁電流と波形処理回路の
出力の直流信号の比例関係がくずれ、計測精度が悪くな
ることがある。The field current of a brushless synchronous machine is rated current /θθθ
If it exceeds ampere, there is also y. In such a case, in the pickup of the above embodiment, the core becomes saturated in the high current range, and the proportional relationship between the field current of the brushless synchronous machine and the DC signal output from the waveform processing circuit breaks down, resulting in poor measurement accuracy. It may happen.
これを解決するためには、波形処理回路に補正用の関数
発生器等が必要となると共にブラシレス同期機毎に関数
発生器の関数設定の必要がある。そこでこのように界磁
電流が高電流域に及ぶ場合でも、波形処理回路に補正用
の関数発生器等を用いることなく界磁電流計測定するた
めに、他の実施例としてコアにエアキャップを設けたピ
ックアップを使用し、これを第S図に示す。第S図にお
いて//aはピックアップであり、半円形のコア/すに
等ピッチでコイル/りが巻いてあり、さらにコア/lに
はλつのエアキャップ16が設けられている。エアキャ
ップ/6は、エア組立時にベークライト等の絶縁物を組
み込んでつくりあげる。オだ、第6図に、エアキャップ
/Aが有する場合と無い場合の比較するために、ピック
アップの出力電圧波形を波形処理回路/2で処理した出
力信号レベルを、ブラシレス同期機の界磁電流の関係を
示した。第6図において縦軸には波形処理回路の出力電
力レベル、横軸にはブラシレス同期機の界磁電流がとっ
てあり、ピックアップのコアにエアキャップが無い場合
は、界磁電流が大きくなるとコアの飽和の影響により、
曲線Aで示すようにピックアップの誘起電圧の直線性が
悪くなり、波形処理回路の出力電力レベルは界磁電流に
比例しなくなる。一方、エアキャップを設えた場合には
、直線Bで示すように波形処理回路の出力電力レベルは
エアキャップ無しの場合のAに比べて下がるが直線性は
保たれる。よって界磁電流が高電流域に達しても、簡単
な積分回路等により充分精度の高い界磁電流信号を取り
出すことができる。In order to solve this problem, a function generator for correction is required in the waveform processing circuit, and it is also necessary to set the function of the function generator for each brushless synchronous machine. Therefore, in order to perform field ammeter measurements without using a function generator for correction in the waveform processing circuit even when the field current reaches a high current range, an air cap is attached to the core as another example. Using the provided pickup, this is shown in Figure S. In FIG. S, //a is a pickup, and coils are wound at equal pitches around a semicircular core, and the core is provided with λ air caps 16. The air cap/6 is made by incorporating an insulating material such as Bakelite when assembling the air. In Fig. 6, in order to compare the cases with and without the air cap/A, the output signal level obtained by processing the output voltage waveform of the pickup in the waveform processing circuit/2 and the field current of the brushless synchronous machine are shown. showed the relationship between In Figure 6, the output power level of the waveform processing circuit is plotted on the vertical axis, and the field current of the brushless synchronous machine is plotted on the horizontal axis. Due to the saturation effect of
As shown by curve A, the linearity of the induced voltage of the pickup deteriorates, and the output power level of the waveform processing circuit is no longer proportional to the field current. On the other hand, when an air cap is provided, as shown by straight line B, the output power level of the waveform processing circuit is lower than A without the air cap, but linearity is maintained. Therefore, even if the field current reaches a high current range, a sufficiently accurate field current signal can be extracted using a simple integrating circuit or the like.
なお、上記実施例では半円形のピックアップについて述
べたが、半円形のピックアップコイル2個を組み合わせ
てもよく、また波形処理回路は積分回路以外にもピーク
検出短の回路が考えられる。In the above embodiment, a semicircular pickup was described, but two semicircular pickup coils may be combined, and the waveform processing circuit may be a peak detection short circuit other than an integrating circuit.
さらK、ピックアップのコアのエアキャップは、ブラシ
レス同期機の界磁電流の大きさによりエアキャップの大
きさ及び個数を決定すればよく、コ個に限定されるもの
ではない。Furthermore, the size and number of air caps for the core of the pickup may be determined depending on the magnitude of the field current of the brushless synchronous machine, and the number is not limited to K.
以上の様に、この発明によれば、ある一定の間隔におい
て回転子軸を取り囲む形態で固定側に取り付けたピック
アップと簡単な波形処理回路および電流計により界磁電
流計測装置を構成したので、遠隔測定方式等に比べて装
置が安価にできると共に回転子側に計測装置を一切積載
する必要がなく信頼性の高いものが得られ、さらにピッ
クアップのコアにエアキャップを設けることKより、プ
ラ(り )
シレス同期機の界磁電流が高電流域に達しても精度が高
く、かつ安価な界磁電流計測装置が得られる効果がある
。As described above, according to the present invention, a field current measuring device is configured with a pickup attached to the stationary side surrounding the rotor shaft at a certain interval, a simple waveform processing circuit, and an ammeter, so that it can be used remotely. Compared to other measuring methods, the device can be made cheaper, and there is no need to mount any measuring device on the rotor side, resulting in a highly reliable device.Furthermore, since an air cap is provided in the core of the pickup, plastic ) Even when the field current of the Cires synchronous machine reaches a high current range, it is possible to obtain a highly accurate and inexpensive field current measuring device.
第1図はこの発明による界磁電流計測装置を備えたブラ
シレス同期機の構成図、第2図は整流器をブラシレス同
期機の界磁巻線を接続する接続導体とピックアップの構
成図、第3図は一般に考えられる工形、凹形コアのピッ
クアップに誘起される電圧波形図、第V図はこの発明の
半円形コアのピックアップに誘起される電圧波形図、第
S図はこの発明の他の実施例のピックアップの正面図、
第6図はブラシレス同期機の界磁電流と波形処理回路の
出力電力レベルの関係図である。
コ・・回転子軸、3・・ブラシレス同期機の界磁巻線、
l・・交流励磁機の電機子、3・・整流器、//、//
a・・ピックアップ、/コ・・波形処理回路、/l・・
コア、/S・・コイル、/6・・エアキャップ。
なお、図中、同一符号は同一、又は相当部分を(r )
示す。
代理人 葛 野 信 −
処1図
焔3図
358−
兜5図
4Fig. 1 is a block diagram of a brushless synchronous machine equipped with a field current measuring device according to the present invention, Fig. 2 is a block diagram of a pickup and a connecting conductor that connects a rectifier to a field winding of the brushless synchronous machine, and Fig. 3 is a block diagram of a pickup. is a voltage waveform diagram induced in a pickup with a generally conceivable working shape and a concave core, Figure V is a diagram of voltage waveforms induced in a pickup with a semicircular core of this invention, and Figure S is another embodiment of this invention Front view of example pickup,
FIG. 6 is a diagram showing the relationship between the field current of the brushless synchronous machine and the output power level of the waveform processing circuit. 3. Field winding of brushless synchronous machine,
l... Armature of AC exciter, 3... Rectifier, //, //
a...Pickup, /co...Waveform processing circuit, /l...
Core, /S...coil, /6...air cap. In the figures, the same reference numerals indicate the same or corresponding parts (r). Agent Shin Kuzuno - Figure 1, figure 3, figure 358 - figure 5, figure 4
Claims (1)
この電機子に接続された整流器、およびこの整流器へ接
続された界磁巻線を備えたブラシレス同期機に於いて、
上記回転子軸に対しである一定の間隔なおいて固定側に
設けられた、少なくとも7個の半円形の界磁電流検出ピ
ックアップ、およびこのピックアップに接続された波形
処理回路を設けたことを特徴とするブラシレス同期機の
界磁電流計測装置。 (,2)ピックアップは、半円形のコアおよびこのコア
に等ピッチで巻かれたコイルから成る特許請求の範囲第
1項記載のブラシレス同期機の界磁電流計測装置。 (3) コアにエアキャップを設けた特許請求の範囲
第コ項記載のブラシレス同期機の界磁電流計測装置。 (F) 波形処理回路は積分回路である特許請求の範
囲第1項ないし第3項のいずれか記載のブラシレス同期
機の界磁電流計測装置。[Claims] (1) An armature of an AC exciter mounted on a rotor shaft;
In a brushless synchronous machine equipped with a rectifier connected to this armature and a field winding connected to this rectifier,
At least seven semicircular field current detection pickups are provided on the fixed side at a certain interval with respect to the rotor axis, and a waveform processing circuit is connected to the pickups. A field current measuring device for brushless synchronous machines. (,2) The field current measuring device for a brushless synchronous machine according to claim 1, wherein the pickup comprises a semicircular core and a coil wound around the core at equal pitches. (3) A field current measuring device for a brushless synchronous machine according to claim 1, wherein the core is provided with an air cap. (F) The field current measuring device for a brushless synchronous machine according to any one of claims 1 to 3, wherein the waveform processing circuit is an integrating circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57126566A JPS5915863A (en) | 1982-07-16 | 1982-07-16 | Apparatus for measuring field curent of brushless synchronous machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57126566A JPS5915863A (en) | 1982-07-16 | 1982-07-16 | Apparatus for measuring field curent of brushless synchronous machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5915863A true JPS5915863A (en) | 1984-01-26 |
Family
ID=14938328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57126566A Pending JPS5915863A (en) | 1982-07-16 | 1982-07-16 | Apparatus for measuring field curent of brushless synchronous machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5915863A (en) |
-
1982
- 1982-07-16 JP JP57126566A patent/JPS5915863A/en active Pending
Non-Patent Citations (1)
Title |
---|
PREPARATION OF HIGH-DENSITY SI3N4 BY A GAS-PRESSURE SINTERING PROCESS * |
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