JPH09140101A - Commutation spark tendency controller - Google Patents
Commutation spark tendency controllerInfo
- Publication number
- JPH09140101A JPH09140101A JP7295030A JP29503095A JPH09140101A JP H09140101 A JPH09140101 A JP H09140101A JP 7295030 A JP7295030 A JP 7295030A JP 29503095 A JP29503095 A JP 29503095A JP H09140101 A JPH09140101 A JP H09140101A
- Authority
- JP
- Japan
- Prior art keywords
- spark
- relative ratio
- alarm
- predicted
- value
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、運転中における直
流機の整流火花の状況を傾向管理する整流火花の傾向管
理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectifying spark trend management device for trend management of the status of rectifying sparks of a DC machine during operation.
【０００２】[0002]
【従来の技術】従来の整流火花監視方法は、図９に示す
如く整流火花の大きさをＪＥＣ54規格の火花号数規定に
基づき定量的に監視しこの整流火花の大きさが一定のレ
ベルを超えた時、警報を発報する構成であった。その
為、整流火花の大きさ（以下「号数」）は、規格ＪＥＣ
54によって１号（無火花）〜８号と規定されており、５
号以上を有害火花としているが４号までは無害としてい
る。すなわち正常時でも２号〜４号の火花は出る場合の
あることを意味している。一方、運転条件と火花号数と
は回転速度Ｎ×電機子電流Ｉの関係にあり、図に示すと
図10のようになる。整流の良い状態では、図10のａのよ
うに傾きが小さくＮ・Ｉ積が大きくても大きな火花にな
らないが、整流の悪い状態では図10のｂのように傾きが
大きくなりＮ・Ｉ積が小さくても大きな火花を発生す
る。2. Description of the Related Art In the conventional method for monitoring rectified sparks, the size of rectified sparks is quantitatively monitored based on the spark number specification of JEC54 standard as shown in FIG. 9, and the size of the rectified sparks exceeds a certain level. When it was turned on, it was configured to issue an alarm. Therefore, the size of the rectifying sparks (hereinafter "number") is based on the standard JEC.
No. 1 (no sparks) to No. 8 according to 54, 5
No. 4 and above are regarded as harmful sparks, but No. 4 and above are considered harmless. That is, it means that the sparks of Nos. 2 to 4 may appear even in the normal state. On the other hand, the operating conditions and the number of sparks are in the relationship of rotational speed N × armature current I, which is shown in FIG. When the rectification is good, a large spark does not occur even if the inclination is small and the NI product is large as shown in a of FIG. A large spark is generated even if it is small.
【０００３】直流機の負荷は、操業のサイクルによって
周期的に変動する。その周期は例えば、２ケ月前後のよ
うに長くなるのが普通である。このとき前記のＮ・Ｉ積
も図11のように操業のサイクルに従って周期的に変動す
る。The load of the DC machine fluctuates periodically depending on the cycle of operation. The cycle is usually long, for example, around two months. At this time, the N · I product also periodically changes according to the operation cycle as shown in FIG.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
方法では、「負荷すなわち電流・速度の割りに火花が大
きい」という判断ができないので、速度・負荷電流の積
が小さい時には、例えば整流が悪くなっていても火花号
数は発報レベル（例えば５号火花）に達しないため警報
が出ない欠点があり、操業のサイクルに従って、操業が
ＮＩ積で次の最大となる時点に至ってようやく火花号数
が発報レベルを超えて警報を発報するという動作になる
ので、従来の構成方法では機器の対策処置が手遅れとな
る場合が多くなり、機器の補修のために操業停止となる
問題がある。However, according to the conventional method, it is impossible to judge that "the spark is large for the load, that is, the current and the speed". Therefore, when the product of the speed and the load current is small, the rectification becomes worse. However, the number of sparks does not reach the warning level (for example, No. 5 sparks), so there is a drawback that an alarm is not issued. According to the cycle of operation, the number of sparks finally reaches the next maximum NI product. Is an alarm that exceeds the alarm level, the conventional configuration method is often too late to take countermeasures against the equipment, and there is a problem that the operation is stopped for repairing the equipment.
【０００５】本発明の目的は、負荷電流・速度のＮ・Ｉ
積を検出し、負荷電流・速度のＮ・Ｉ積の割りに火花が
大きいかどうかを判定できる構成とすることにより整流
悪化の早い段階で警報を発報することにより、タイムリ
ーな保守・点検を可能とすることで整流悪化による設備
の停止を防ぎ、設備の稼働率を向上し、また、信頼性を
も向上することを目的とした整流火花の傾向管理装置を
得ることにある。An object of the present invention is to determine load current / speed N · I.
By detecting the product and judging whether the spark is large for the N product of load current and speed, it is possible to issue an alarm at an early stage of deterioration of rectification, thereby performing timely maintenance and inspection. The purpose of the present invention is to obtain a rectifying spark tendency management device aiming at preventing equipment from being stopped due to deterioration of rectification, improving the operating rate of the equipment, and improving reliability.
【０００６】[0006]
【課題を解決するための手段】本発明は以上の目的を達
成するために、請求項１の発明は、整流子とブラシとの
間で発生する整流火花の大きさを検出する火花監視手段
と、電動機の負荷電流と速度との積から予測火花の大き
さを演算する予測火花演算部と、前記火花監視手段によ
る実火花信号と前記予測火花演算部による予測火花信号
との相対比を演算する相対比演算部と、この相対比に関
して警報すべき警報値レベルを設定する警報値設定手段
と、前記相対比と前記警報値レベルとを比較する比較器
と、この比較器による比較結果に基づいて、前記相対比
が前記警報値レベルの相対比に達している場合に警報を
発する警報手段とを備えた整流火花の傾向管理装置を提
供する。In order to achieve the above object, the present invention provides a spark monitoring means for detecting the size of a commutation spark generated between a commutator and a brush. , A predictive spark calculation unit that calculates the size of the predicted spark from the product of the load current and speed of the motor, and a relative ratio between the actual spark signal by the spark monitoring means and the predicted spark signal by the predicted spark calculation unit A relative ratio calculation unit, an alarm value setting means for setting an alarm value level to be alarmed with respect to the relative ratio, a comparator for comparing the relative ratio with the alarm value level, and a comparison result by the comparator. And a warning means for issuing a warning when the relative ratio reaches the relative ratio of the alarm value level.
【０００７】請求項２の発明は、請求項１記載の整流火
花の傾向管理装置において、前記予測火花演算部は、比
例係数設定部を設け、この比例係数設定部に実測温度お
よび湿度の係数を設定し、前記電動機の負荷電流と速度
との積に対して前記係数を掛算して予測火花の大きさを
演算するようにしたものである。According to a second aspect of the present invention, in the rectifying spark tendency management device according to the first aspect, the predictive spark computing section is provided with a proportional coefficient setting section, and the proportional coefficient setting section sets the measured temperature and humidity coefficients. It is set, and the product of the load current and the speed of the electric motor is multiplied by the coefficient to calculate the size of the predicted spark.
【０００８】請求項３の発明は、請求項１記載の整流火
花の傾向管理装置において、前記警報値レベルを相対比
の大きさに応じて複数設定するとともに、それぞれの警
報値レベルに応じた警報を行うようにしたものである。According to a third aspect of the present invention, in the rectifying spark tendency management device according to the first aspect, a plurality of alarm value levels are set according to the magnitude of the relative ratio, and an alarm corresponding to each alarm value level is set. Is to do.
【０００９】請求項４の発明は、請求項１記載の整流火
花の傾向管理装置において、前記予測火花演算部は、電
動機の負荷電流と速度との積の絶対値に基づいて予測火
花の大きさを演算するようにしたものである。According to a fourth aspect of the present invention, in the trend control device for rectified sparks according to the first aspect, the predicted spark calculation unit calculates the predicted spark size based on the absolute value of the product of the load current and the speed of the electric motor. Is calculated.
【００１０】請求項５の発明は、請求項１記載の整流火
花の傾向管理装置において、前記相対比演算部により演
算された相対比を一定周期毎にその周期内で演算された
最大値を出力表示するようにしたものである。According to a fifth aspect of the present invention, in the trend control device for rectifying sparks according to the first aspect, the relative ratio calculated by the relative ratio calculation unit is output at a constant cycle at a maximum value calculated within that cycle. It is intended to be displayed.
【００１１】請求項６の発明は、請求項１記載の整流火
花の傾向管理装置において、前記相対比演算部により演
算された相対比を一定周期毎にその周期間内で演算され
た相対比データの最大値および平均値を出力表示するよ
うにしたものである。According to a sixth aspect of the present invention, in the trend management apparatus for rectifying sparks according to the first aspect, the relative ratio data calculated by the relative ratio calculation unit is calculated every fixed period within the period. The maximum and average values of are output and displayed.
【００１２】請求項７の発明は、整流子とブラシとの間
で発生する整流火花の大きさを検出する火花監視手段
と、電動機の負荷電流と速度との積から予測火花の大き
さを演算する予測火花演算部と、前記火花監視手段によ
る実火花信号と前記予測火花演算部による予測火花信号
との相対比を演算する相対比演算部と、最新の前記相対
比を時系列的に所定個数順次記憶してそれら相対比の平
均値を演算する移動平均値演算手段と、この平均値に関
して警報すべき警報値レベルを設定する警報値設定手段
と、前記平均値と前記警報値レベルとを比較する比較器
と、この比較器による比較結果に基づいて、前記平均値
が前記警報値レベルの平均値に達している場合に警報を
発する警報手段とを備えた整流火花の傾向管理装置であ
る。According to a seventh aspect of the present invention, the predicted spark size is calculated from the spark monitoring means for detecting the size of the rectified spark generated between the commutator and the brush, and the product of the load current and speed of the electric motor. A predicted spark calculation unit, a relative ratio calculation unit that calculates a relative ratio between the actual spark signal by the spark monitoring unit and the predicted spark signal by the predicted spark calculation unit, and the latest relative ratio by a predetermined number in time series. A moving average value calculating means for sequentially storing and calculating an average value of the relative ratios, an alarm value setting means for setting an alarm value level for alarming the average value, and comparing the average value with the alarm value level And a warning means for issuing a warning when the average value has reached the average value of the alarm value level based on the comparison result by the comparator.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施例を図面を参
照して説明する。図１は、本発明の一実施例を示すブロ
ック構成図である。この実施例は、実火花号数レベル信
号Ｓ1 と予測火花号数レベル信号Ｓ2 の相対値Ｓ1 ／Ｓ
2 から警報値レベルと比較し所定のレベル以上になれば
警報を発報させることにより整流状況の傾向監視をして
いる。火花監視装置は、従来技術のものと同様に構成す
る。又、直流機の運転状況における回転速度Ｎと負荷電
流Ｉの検出信号をサイリスタレオナード装置から受け取
る速度検出装置３と電流検出装置４と、Ｎ・Ｉの積を算
出する掛算器５と、さらに調整可能な比例係数αを乗じ
てＮ・Ｉ積を算出する掛算器７と、計測した実火花号数
レベルＳ1 と予測火花号数レベルＳ2 の火花号数相対値
Ｓ1 ／Ｓ2 を演算する割算器８と、その結果を記憶・表
示する記憶・表示装置13と、警報値レベルを設定する警
報値設定装置９と火花号数相対値Ｓ1／Ｓ2 と警報値レ
ベルを比較する比較器10と所定のレベル以上で警報を表
示・出力する警報表示・出力設定部11とから構成されて
いる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In this embodiment, the relative value S 1 / S of the actual spark number level signal S 1 and the predicted spark number level signal S 2
The trend monitoring of the rectification situation is carried out by comparing the alarm value level from 2 and issuing an alarm if it exceeds a predetermined level. The spark monitoring device is constructed similarly to that of the prior art. Further, a speed detecting device 3 and a current detecting device 4 which receive a detection signal of a rotation speed N and a load current I from a thyristor Leonard device in an operating condition of a DC machine, a multiplier 5 for calculating a product of N · I, and further adjustment Multiplier 7 that calculates the N · I product by multiplying the possible proportional coefficient α, and the relative value S 1 / S 2 of the spark number between the measured actual spark number level S 1 and the predicted spark number level S 2 A divider 8 for storing, a storage / display device 13 for storing and displaying the result, an alarm value setting device 9 for setting an alarm value level, and a spark number relative value S 1 / S 2 and an alarm value level are compared. It is composed of a comparator 10 and an alarm display / output setting unit 11 for displaying / outputting an alarm at a predetermined level or higher.
【００１４】直流機の運転状況における実火花は、従来
技術の火花監視手段で感度調整された火花センサー１に
より計測され、実火花号数信号としてアンプ２を通し実
火花号数レベル信号Ｓ1 として予測火花号数レベル信号
Ｓ2 との相対値Ｓ1 ／Ｓ2 を算出するため割算部８に送
られる。一方、直流電動機は、一般に可変速の速度制御
のため、サイリスタレオナード装置により駆動されてい
る。サイリスタレオナード装置は、速度制御の必要上直
流電動機の回転速度Ｎと電機子電流Ｉ（以下、負荷電流
と呼ぶ）を時事刻々検出しているため、運転状況におけ
る回転速度Ｎと負荷電流Ｉの検出信号は、速度検出装置
３と電流検出装置４へそれぞれ電圧信号の形でサイリス
タレオナード装置から受取り、その電圧信号を掛算器５
に入力してＮとＩの積Ｎ・Ｉを算出する。算出されたＮ
・Ｉ値は、工場試験結果の火花号数を基に校正するため
の調整可能な比例係数設定部６にて設定する比例係数α
を乗じて、Ｎ・Ｉ・αの積を掛算器７で電圧信号レベル
に換算される。この換算値は、予測火花号数レベルＳ2
信号として、先の実火花号数レベル信号Ｓ1 と火花号数
相対値Ｓ1 ／Ｓ2 を演算する割算部８に送られる。火花
号数相対値Ｓ1 ／Ｓ2 は、警報値設定装置９にて、整流
子やブラシへの実害（ＪＥＣ54-1982 に規定）を加味
し、あらかじめ設定した警報値レベルと比較器10にて比
較し、所定の警報値レベル以上（例えば、Ｓ1 ／Ｓ2 ＝
1.5 以上）で警報を出力する。The actual spark in the operating condition of the DC machine is measured by the spark sensor 1 whose sensitivity is adjusted by the conventional spark monitoring means, and the actual spark number signal is passed through the amplifier 2 as the actual spark number level signal S 1. It is sent to the division unit 8 to calculate the relative value S 1 / S 2 with respect to the predicted spark number level signal S 2 . On the other hand, a DC motor is generally driven by a thyristor Leonard device for variable speed control. Since the thyristor Leonard device detects the rotation speed N of the DC motor and the armature current I (hereinafter referred to as load current) momentarily because of the necessity of speed control, the detection of the rotation speed N and the load current I in the operating condition is performed. The signal is received from the thyristor Leonard device in the form of a voltage signal to the speed detecting device 3 and the current detecting device 4, respectively, and the voltage signal is multiplied by the multiplier 5
To calculate the product N · I of N and I. Calculated N
The I value is a proportional coefficient α set by the adjustable proportional coefficient setting unit 6 for calibration based on the spark number of the factory test result.
And the product of N · I · α is converted to a voltage signal level by the multiplier 7. This converted value is the predicted spark number level S 2
As a signal, it is sent to the division unit 8 which calculates the actual spark number level signal S 1 and the spark number relative value S 1 / S 2 . The relative number S 1 / S 2 of the spark number is adjusted by the alarm value setting device 9 in consideration of the actual damage to the commutator and the brush (specified in JEC54-1982) and the preset alarm value level and the comparator 10. Compare and compare with a predetermined alarm value level (for example, S 1 / S 2 =
(1.5 or more) outputs an alarm.
【００１５】一方、実火花号数は、季節・環境に左右さ
れる場合がある。このような場合には、予測火花号数の
比例係数αの予測精度を向上することができる。図２に
示す如く掛算器７の後段に温度・湿度の影響係数を乗ず
る掛算器71を挿入する。影響係数は、手動設定の影響係
数設定器72もしくは、自動設定の影響係数設定器73によ
って設定される。影響係数設定器72もしくは、73は、直
流機に冷却風を送風する冷却経路中に設けた温度計74・
湿度計75の出力を用いて設定値演算する構成とする。On the other hand, the actual number of sparks may depend on the season and environment. In such a case, the prediction accuracy of the proportional coefficient α of the predicted spark number can be improved. As shown in FIG. 2, a multiplier 71 that multiplies the influence coefficient of temperature and humidity is inserted after the multiplier 7. The influence coefficient is set by the influence coefficient setter 72 of manual setting or the influence coefficient setter 73 of automatic setting. The influence coefficient setter 72 or 73 is a thermometer 74 / provided in the cooling path for sending the cooling air to the DC machine.
The output of the hygrometer 75 is used to calculate the set value.
【００１６】この構成によって、温度・湿度すなわち季
節・環境の影響を加味した予測火花号数が演算でき、予
測火花号数の予測精度を向上することができる。又、整
流状況の程度によって、整流悪化の前に直流機の対策処
置内容を区分けしたい時がある。このような場合、図１
で比較器10を複数個並列に配置し、それぞれに警報値設
定装置９を設け、かつその設定値を各々レベル１〜ｎに
変えて設定する。又、表示・出力部も複数とする構成と
する。With this configuration, the predicted number of sparks can be calculated in consideration of the effects of temperature / humidity, that is, the season / environment, and the prediction accuracy of the predicted number of sparks can be improved. In addition, depending on the degree of rectification, it is sometimes desirable to classify the countermeasures for the DC machine before deterioration of rectification. In such a case,
In this case, a plurality of comparators 10 are arranged in parallel, an alarm value setting device 9 is provided for each of them, and the set values are changed to levels 1 to n for setting. Further, the display / output unit is also provided in plural.
【００１７】この構成によって整流状況の程度によっ
て、設定値レベル１〜ｎにより例えば「気吹清掃」や、
「整流子旋削」など直流機の対策処置内容を整流状況の
程度によって、表示・出力することができる。With this configuration, depending on the degree of the rectification state, for example, "air blow cleaning" depending on the set value levels 1 to n,
It is possible to display and output the contents of countermeasures for DC machines such as "commutator turning" depending on the degree of rectification.
【００１８】図３に直流機の負荷電流パターンの一例を
示す。直流機の運転時の負荷電流パターンは制動時、電
流の向きが逆となり制動電流が大きな場合、そのままで
は予測火花号数が負（マイナス）の値になる。このよう
な場合、図４に示す如く、予測火花号数を演算するため
Ｎ・Ｉ積演算部５の後段に絶対値演算部51を追加する構
成とする。この構成により、電流・速度の向きによる正
負にかかわらず、絶対値演算部51によって常に正の値と
なり精度の高い予測火花号数を演算することができる。FIG. 3 shows an example of the load current pattern of the DC machine. When braking, the load current pattern during operation of the DC machine has a reverse current direction, and when the braking current is large, the predicted number of sparks becomes a negative value as it is. In such a case, as shown in FIG. 4, an absolute value calculation unit 51 is added after the N · I product calculation unit 5 to calculate the predicted number of sparks. With this configuration, the absolute value calculation unit 51 can always calculate the predicted spark number with high accuracy, regardless of whether the current / speed direction is positive or negative.
【００１９】図５に示す如く、直流機の運転パターン例
えば圧延用の運転パターンでは、負荷が２〜10分の短期
間で間欠的に加わり、この間には、実火花号数が小さい
期間が含まれる。実火花号数と予測火花号数の小さいも
のどうしで割算を行うと精度が低下する。このような場
合、図６に示す如く、実火花監視装置１、２の後段およ
び予測火花演算部７の後段に最大値を一時的に保持する
保持手段78及び79を追加する。かつ一定周期毎にその一
定周期中の最大値を出力表示し、その後タイマー82及び
82Ａにてリセットする構成とする。この構成により、予
測火花号数のＮ・Ｉ積と実火花号数の両方の最大値を保
持し、リアルタイムで出力・表示することができる。As shown in FIG. 5, in the operation pattern of the DC machine, for example, the operation pattern for rolling, the load is intermittently applied in a short period of 2 to 10 minutes, and during this period, a period in which the actual spark number is small is included. Be done. If the actual spark number and the predicted spark number are smaller, the accuracy will be reduced. In such a case, as shown in FIG. 6, holding means 78 and 79 for temporarily holding the maximum value are added to the subsequent stage of the actual spark monitoring devices 1 and 2 and the subsequent stage of the predicted spark calculation unit 7. Also, the maximum value in the fixed cycle is output and displayed every fixed cycle, and then the timer 82 and
It is configured to be reset at 82A. With this configuration, the maximum values of both the NI product of the predicted spark number and the actual spark number can be held and output / displayed in real time.
【００２０】又、一定周期毎の平均値を調査したい場合
がある。このような場合、一定周期（例えば４分）で一
定周期間（例えば８Ｈ）のデータを読み出して、その間
の平均値を算出する平均値演算部78Ａ及び79Ａを追加す
る構成とする。この構成により、一定期間の予測火花号
数と実火花号数の平均値を求めることができる。Further, there is a case where it is desired to investigate the average value for each fixed period. In such a case, the average value calculators 78A and 79A for reading out data for a certain period (for example, 8H) at a certain period (for example, 4 minutes) and calculating an average value during that period are added. With this configuration, it is possible to obtain the average value of the predicted number of sparks and the actual number of sparks for a certain period.
【００２１】さらに、一定周期間毎の最大値の履歴を調
査したい場合がある。このような場合、一定期間（例え
ば８Ｈ）毎の最大値及び平均値を多数（例えば１年分）
を順次記憶する記憶手段78Ｂ及び79Ｂを追加する構成と
する。この構成により、一定期間（例えば１年間）の予
測火花号数と実火花号数の最大値及び平均値の履歴を求
めることができ、この履歴を出力・表示することによっ
て、年間の傾向を把握することができ、直流機の処置・
対策を計画的に行うことができる。Further, it may be desired to investigate the history of the maximum value for each fixed period. In such a case, a large number of maximum values and average values (for one year, for example) for each fixed period (for example, 8H)
The storage means 78B and 79B for sequentially storing is added. With this configuration, it is possible to obtain a history of the maximum and average values of the predicted number of sparks and the actual number of sparks for a certain period (for example, one year), and by outputting and displaying this history, the annual trend can be grasped. You can do the treatment of the DC machine
Measures can be planned.
【００２２】予測火花号数と実火花号数の相対火花の相
対値を時系列的に傾向を見ていくと、短時間（例えば８
Ｈスパン）の相対火花の大きさは、図７に示すようなバ
ラツキが発生する。このような場合、図８に示す如く、
割算器８の後段に最新のデータ複数個の移動平均を演算
する移動平均演算部81を追加する構成とする。この構成
により図７の実線で示す如く、複数個のデータを順次移
動して平均を取るので相対比のバラツキを平滑化するこ
とができる。これによって、バラツキによる誤報を回避
することができ、信頼性の高い傾向管理ができる。Looking at the relative values of the relative sparks of the predicted number of sparks and the actual number of sparks in a time series, it is possible to find a short time (for example, 8
The relative spark size of (H span) varies as shown in FIG. 7. In such a case, as shown in FIG.
A moving average calculator 81 for calculating the moving average of the latest data is added to the stage after the divider 8. With this configuration, as shown by the solid line in FIG. 7, since a plurality of data are sequentially moved and averaged, the variation of the relative ratio can be smoothed. As a result, false alarms due to variations can be avoided, and highly reliable trend management can be performed.
【００２３】又、移動平均相対比が、所定（例えば1.5
）の値一回にて警報を発するのではなく、複数回で警
報を出力するように比較器10の後段にカウンター10Ａと
警報を出力するための比較器10Ｂを追加する構成とす
る。この構成により、移動平均相対比レベルが所定（例
えば1.5 ）の値をカウンター10Ａが計測し、比較器10Ｂ
にて比較し所定の回数を超えたら、警報を出力するよう
にする。これによって、より誤報を回避することがで
き、保全処置を講ずるか否かの信頼性の高い傾向管理が
できる。Further, the moving average relative ratio is a predetermined value (for example, 1.5
) The alarm is not issued once, but the counter 10A and the comparator 10B for outputting the alarm are added after the comparator 10 so that the alarm is output a plurality of times. With this configuration, the counter 10A measures a value at which the moving average relative ratio level is predetermined (for example, 1.5), and the comparator 10B
And the alarm is output when the number of comparisons exceeds a predetermined number. This makes it possible to avoid more false alarms and perform highly reliable trend management as to whether or not to take maintenance measures.
【００２４】[0024]
【発明の効果】本発明によれば回転速度と負荷電流の割
りに火花が大きいという判断ができ、整流悪化の初期段
階で機器の処置を施すことができる。According to the present invention, it can be determined that sparks are large relative to the rotation speed and the load current, and the equipment can be treated at the initial stage of deterioration of rectification.
【図１】本発明の整流火花傾向管理装置の実施例を示す
ブロック構成図。FIG. 1 is a block configuration diagram showing an embodiment of a rectified spark tendency management device of the present invention.
【図２】本発明の整流火花傾向管理装置の変形例を示す
ブロック構成図。FIG. 2 is a block configuration diagram showing a modified example of the rectifying spark tendency management device of the present invention.
【図３】直流機の負荷電流パターンの例を示す図。FIG. 3 is a diagram showing an example of a load current pattern of a DC machine.
【図４】本発明の整流火花傾向管理装置の変形例を示す
ブロック構成図。FIG. 4 is a block configuration diagram showing a modified example of the rectified spark tendency management device of the present invention.
【図５】直流機の運転パターンの例を示す図。FIG. 5 is a diagram showing an example of an operation pattern of a DC machine.
【図６】本発明の整流火花傾向管理装置の変形例を示す
ブロック構成図。FIG. 6 is a block configuration diagram showing a modified example of the rectifying spark tendency management device of the present invention.
【図７】時系列的な予測火花と実火花の相対値及び、そ
の移動平均の例を示す図。FIG. 7 is a diagram showing an example of relative values of predicted sparks and actual sparks in time series, and a moving average thereof.
【図８】本発明の整流火花傾向管理装置の変形例を示す
ブロック構成図。FIG. 8 is a block configuration diagram showing a modified example of the rectified spark tendency management device of the present invention.
【図９】従来の整流火花監視装置を示すブロック構成
図。FIG. 9 is a block diagram showing a conventional rectification spark monitoring device.
【図１０】運転条件と火花号数の関係を示す図。FIG. 10 is a diagram showing the relationship between operating conditions and the number of sparks.
【図１１】操業のサイクルと負荷（Ｎ・Ｉ積）の関係を
示す図。FIG. 11 is a diagram showing a relationship between an operation cycle and a load (N · I product).
１：火花センサー、２：アンプ、３：速度検出装置、
４：電流検出装置、５：掛算器、６：比例係数設定部、
７：掛算器、８：割算器、９：警報値設定装置、10：比
較器、10Ａ：カウンター、10Ｂ：カウント比較器、11：
警報表示・出力部、12：記憶装置、13：記憶・表示装
置、51：絶対値演算部、71：掛算器、72：手動設定影響
係数設定器、73：自動設定影響係数設定器、74：温度
計、75：湿度計、78：実火花最大値保持手段、78Ａ：実
火花平均値演算部、78Ｂ：実火花記憶手段、79：予測火
花最大値保持手段、79Ａ：予測火花平均値演算部、79
Ｂ：予測火花記憶手段、81：移動平均値演算部、82：タ
イマー、82Ａ：タイマー。1: Spark sensor, 2: Amplifier, 3: Speed detection device,
4: Current detection device, 5: Multiplier, 6: Proportional coefficient setting unit,
7: Multiplier, 8: Divider, 9: Alarm value setting device, 10: Comparator, 10A: Counter, 10B: Count comparator, 11:
Alarm display / output unit, 12: storage device, 13: storage / display device, 51: absolute value calculation unit, 71: multiplier, 72: manual setting influence coefficient setter, 73: automatic setting influence coefficient setter, 74: Thermometer, 75: Hygrometer, 78: Actual spark maximum value holding unit, 78A: Actual spark average value calculation unit, 78B: Actual spark storage unit, 79: Predicted spark maximum value holding unit, 79A: Predicted spark average value calculation unit , 79
B: predictive spark storage means, 81: moving average value calculation unit, 82: timer, 82A: timer.
Claims (7)
花の大きさを検出する火花監視手段と、電動機の負荷電
流と速度との積から予測火花の大きさを演算する予測火
花演算部と、前記火花監視手段による実火花信号と前記
予測火花演算部による予測火花信号との相対比を演算す
る相対比演算部と、この相対比に関して警報すべき警報
値レベルを設定する警報値設定手段と、前記相対比と前
記警報値レベルとを比較する比較器と、この比較器によ
る比較結果に基づいて、前記相対比が前記警報値レベル
の相対比に達している場合に警報を発する警報手段とを
備えたことを特徴とする整流火花の傾向管理装置。1. A spark monitoring unit for detecting the size of a commutation spark generated between a commutator and a brush, and a predicted spark calculation unit for calculating a predicted spark size from a product of a load current and a speed of an electric motor. And a relative ratio calculation unit that calculates a relative ratio between the actual spark signal by the spark monitoring unit and the predicted spark signal by the predicted spark calculation unit, and an alarm value setting unit that sets an alarm value level to be alarmed regarding this relative ratio. And a comparator that compares the relative ratio with the alarm value level, and an alarm unit that issues an alarm when the relative ratio reaches the relative ratio of the alarm value level based on the comparison result by the comparator. A flow rectifying spark trend management device comprising:
において、前記予測火花演算部は、比例係数設定部を設
け、この比例係数設定部に実測温度および湿度の係数を
設定し、前記電動機の負荷電流と速度との積に対して前
記係数を掛算して予測火花の大きさを演算するようにし
たことを特徴とする整流火花の傾向管理装置。2. The rectifying spark tendency management device according to claim 1, wherein the predictive spark computing unit is provided with a proportional coefficient setting unit, and the measured temperature and humidity coefficients are set in the proportional coefficient setting unit. The device for controlling the tendency of rectified sparks, characterized in that the product of the load current and the speed is multiplied by the coefficient to calculate the predicted spark size.
において、前記警報値レベルを相対比の大きさに応じて
複数設定するとともに、それぞれの警報値レベルに応じ
た警報を行うようにしたことを特徴とする整流火花の傾
向管理装置。3. The trend management device for rectifying sparks according to claim 1, wherein a plurality of the alarm value levels are set according to the magnitude of the relative ratio, and an alarm is issued according to each alarm value level. A rectifying spark tendency management device characterized by the above.
において、前記予測火花演算部は、電動機の負荷電流と
速度との積の絶対値に基づいて予測火花の大きさを演算
するようにしたことを特徴とする整流火花の傾向管理装
置。4. The trend control device for rectified sparks according to claim 1, wherein the predicted spark calculation unit calculates the predicted spark size based on an absolute value of a product of a load current and a speed of the electric motor. A trend control device for rectifying sparks, characterized in that
において、前記相対比演算部により演算された相対比を
一定周期毎にその周期内で演算された最大値を出力表示
するようにしたことを特徴とする整流火花の傾向管理装
置。5. The rectifying spark tendency management device according to claim 1, wherein the relative ratio calculated by the relative ratio calculation unit is displayed at a constant cycle every time a maximum value calculated in the cycle is displayed. A rectifying spark tendency management device characterized by the above.
において、前記相対比演算部により演算された相対比を
一定周期毎にその周期間内で演算された相対比データの
最大値および平均値を出力表示するようにしたことを特
徴とする整流火花の傾向管理装置。6. The trend management device for rectifying sparks according to claim 1, wherein the relative ratio calculated by the relative ratio calculation unit is the maximum value and the average of the relative ratio data calculated in each constant cycle. A rectifying spark tendency management device characterized in that a value is output and displayed.
花の大きさを検出する火花監視手段と、電動機の負荷電
流と速度との積から予測火花の大きさを演算する予測火
花演算部と、前記火花監視手段による実火花信号と前記
予測火花演算部による予測火花信号との相対比を演算す
る相対比演算部と、最新の前記相対比を時系列的に所定
個数順次記憶してそれら相対比の平均値を演算する移動
平均値演算手段と、この平均値に関して警報すべき警報
値レベルを設定する警報値設定手段と、前記平均値と前
記警報値レベルとを比較する比較器と、この比較器によ
る比較結果に基づいて、前記平均値が前記警報値レベル
の平均値に達している場合に警報を発する警報手段とを
備えたことを特徴とする整流火花の傾向管理装置。7. A spark monitoring means for detecting the size of a commutation spark generated between a commutator and a brush, and a predictive spark calculator for calculating a predictive spark size from a product of a load current and a speed of an electric motor. A relative ratio calculation unit for calculating a relative ratio between the actual spark signal by the spark monitoring means and the predicted spark signal by the predicted spark calculation unit, and a predetermined number of the latest relative ratios sequentially stored in sequence A moving average value calculating means for calculating an average value of the relative ratio, an alarm value setting means for setting an alarm value level to be alarmed with respect to this average value, and a comparator for comparing the average value with the alarm value level, A rectifying spark tendency management device comprising: an alarm unit that issues an alarm when the average value has reached the average value of the alarm value levels based on the comparison result by the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29503095A JP3352300B2 (en) | 1995-11-14 | 1995-11-14 | Rectification spark trend management device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29503095A JP3352300B2 (en) | 1995-11-14 | 1995-11-14 | Rectification spark trend management device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09140101A true JPH09140101A (en) | 1997-05-27 |
| JP3352300B2 JP3352300B2 (en) | 2002-12-03 |
Family
ID=17815421
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29503095A Expired - Fee Related JP3352300B2 (en) | 1995-11-14 | 1995-11-14 | Rectification spark trend management device |
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| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008173364A (en) * | 2007-01-22 | 2008-07-31 | Mitsubishi Electric Corp | Vacuum cleaner |
| WO2010074282A1 (en) * | 2008-12-26 | 2010-07-01 | 株式会社東芝 | Electric vacuum cleaner |
| JP2010174804A (en) * | 2009-01-30 | 2010-08-12 | Toshiba Corp | Electric vacuum cleaner |
| JP2010273984A (en) * | 2009-05-29 | 2010-12-09 | Toshiba Corp | Vacuum cleaner |
| JP2020003358A (en) * | 2018-06-28 | 2020-01-09 | 学校法人東京理科大学 | Steel material component identification device and program therefor |
-
1995
- 1995-11-14 JP JP29503095A patent/JP3352300B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008173364A (en) * | 2007-01-22 | 2008-07-31 | Mitsubishi Electric Corp | Vacuum cleaner |
| WO2010074282A1 (en) * | 2008-12-26 | 2010-07-01 | 株式会社東芝 | Electric vacuum cleaner |
| CN102292012A (en) * | 2008-12-26 | 2011-12-21 | 株式会社东芝 | Electric vacuum cleaner |
| RU2494667C2 (en) * | 2008-12-26 | 2013-10-10 | Кабусики Кайся Тосиба | Electric vacuum cleaner |
| EP2387929A4 (en) * | 2008-12-26 | 2016-03-09 | Toshiba Kk | Electric vacuum cleaner |
| JP2010174804A (en) * | 2009-01-30 | 2010-08-12 | Toshiba Corp | Electric vacuum cleaner |
| JP2010273984A (en) * | 2009-05-29 | 2010-12-09 | Toshiba Corp | Vacuum cleaner |
| JP2020003358A (en) * | 2018-06-28 | 2020-01-09 | 学校法人東京理科大学 | Steel material component identification device and program therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3352300B2 (en) | 2002-12-03 |
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