JP2005287153A - Device for preventing damage of main motor due to idling - Google Patents

Device for preventing damage of main motor due to idling Download PDF

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JP2005287153A
JP2005287153A JP2004096042A JP2004096042A JP2005287153A JP 2005287153 A JP2005287153 A JP 2005287153A JP 2004096042 A JP2004096042 A JP 2004096042A JP 2004096042 A JP2004096042 A JP 2004096042A JP 2005287153 A JP2005287153 A JP 2005287153A
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idling
main motor
circuit
main
speed control
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Kazuhiko Hamada
和彦 濱田
Hisanori Takada
尚紀 高田
Hiromoto Haruna
宏基 春名
Yoshiaki Uketa
嘉明 請田
Michiharu Izawa
道晴 井澤
Mitsuru Sugimoto
満 杉本
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West Japan Railway Technos Corp
West Japan Railway Co
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West Japan Railway Technos Corp
West Japan Railway Co
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for preventing the damage of a main motor which can materialize the downsizing, the weight reduction, and the change into electric non-contact by performing the idle detection by the current difference between main motors, on the step of weakish field control in a high-speed range where it is necessary to perform idling detection without fail, and besides which can be mounted to an existing high-voltage circuit by external addition. <P>SOLUTION: This device is composed of a means which detects the speed control on the weakish field control step in a high-speed range, an ammeter hole CT which is installed in each parallel circuit of main motors 1-4 or 5-8, a current value comparator circuit which compares the output values CT1 and CT2 of the ammeter hole CT, and a control circuit which judges it to be the idling of a wheel and outputs a specified control signal when the output of the current value comparator circuit is at or over a specified value. The control signal is used to switch off a power running circuit or to inform the driver of it by means of a lamp or an alarm, etc. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

本発明は、車両の空転に起因して発生するフラッシュオーバーによる主電動機の損傷を防止する装置に関するものである。   The present invention relates to an apparatus for preventing damage to a main motor due to flashover caused by idling of a vehicle.

電車車両では、雨天時、特に雨の降り始めや落ち葉の堆積等により車輪の空転、滑走が発生し易くなる。一旦、車輪が空転を始めると、主電動機の負荷が急激に軽くなるため、回転数が更に高くなる。この回転数の増加は、やがて大空転となり、主電動機の整流が大空転に追いつけず、整流不良となり、フラッシュオーバーを伴っていた。そのため、主電動機の機枠等を通じて過大電流が流れ(地絡)、主電動機の損傷事故に至るという問題があった。また過大電流が流れると、架線からの電力の供給が停止されていた。このような主電動機の損傷事故又は架線からの電力の供給停止があると、その復旧までに多くの手間と時間を要し、列車運行ダイヤが乱れる原因になっていた。   In train cars, wheel slipping and sliding are likely to occur during rainy weather, especially when it starts to rain or when fallen leaves accumulate. Once the wheel starts idling, the load on the main motor is abruptly reduced, and the rotational speed is further increased. This increase in rotational speed eventually caused a large idling, and the commutation of the main motor could not catch up with the large idling, resulting in a commutation failure and a flashover. Therefore, there is a problem that an excessive current flows through the machine frame of the main motor (ground fault), leading to a damage accident of the main motor. Moreover, when an excessive current flowed, the supply of power from the overhead line was stopped. If there is an accident such as damage to the main motor or power supply from the overhead line, it takes a lot of time and effort to restore it, causing the train operation schedule to be disturbed.

このような空転に起因する問題点を解決する対策の方法として、特許文献1に記載されたものがある。この特許文献1の技術は、主電動機の並列回路を流れる電流値を計測し、空転が発生したときに並列回路どうしの間に電流差が発生することを利用して、空転を検知している。そして、空転が発生したときは、主電動機へ流れる電流パターンを減少させることにより、空転軸の駆動力を動摩擦力以下にし、再粘着させるようにしている。   As a countermeasure method for solving such problems caused by idling, there is one described in Patent Document 1. The technology of Patent Document 1 measures the value of current flowing through the parallel circuit of the main motor, and detects idling by utilizing the fact that a current difference is generated between the parallel circuits when idling occurs. . When idling occurs, the current pattern flowing to the main motor is reduced, so that the driving force of the idling shaft is reduced to the dynamic friction force or less and is adhered again.

ところが、前記特許文献1の技術では、車輪に発生する空転の全てを検知してこれに対処しているため、低速域,中速域,高速域の全ての領域において、空転が発生した場合には、主電動機への電流パターンを減少させることになる。そのため、僅かの空転のみで、大空転に至ることがなく、フラッシュオーバー等も起こり得ない空転、すなわち、見過ごした方が良い空転にまでも敏感に反応して対処してしまうということと、更に、前述の抵抗制御を行っている車両では、中速域において複数の主電動機を並列に接続し、主抵抗器を交互に短絡する制御を行っているため、このときに並列回路に電流差が発生し、空転検知装置が空転していると見做して力行不能となるという問題があった。この過敏な空転検知による対処により、空転検知継電器が頻繁に切断されて車両への電源の供給が停止され、力行不能とその復旧作業の繰り返しとなり、結果として列車遅延が生じ、運行ダイヤが乱れるという問題があった。
このような事情から、並列接続された主電動機の並列回路へ流れる電流差を検出して空転を検知し、これに対処する方法は採用されていなかったのが現状である。
However, in the technique of Patent Document 1, since all of the idling occurring in the wheel is detected and dealt with, the idling occurs in all of the low speed range, the medium speed range, and the high speed range. Will reduce the current pattern to the main motor. Therefore, only a few idlings do not lead to large idling, and no idling that flashover etc. can occur, that is, it is sensitive to react even to idling that should be overlooked, and further, In a vehicle that performs the resistance control described above, a plurality of main motors are connected in parallel in the medium speed range and the main resistor is alternately short-circuited. There was a problem that power running was impossible because it was assumed that the idling detection device was idling. Due to this sensitive detection of slipping, the slipping detection relay is frequently cut off, the power supply to the vehicle is stopped, powering is impossible and the recovery work is repeated, resulting in train delays and disruption of the operation schedule There was a problem.
Under such circumstances, the current situation is that a method for detecting idling by detecting a difference in current flowing in the parallel circuit of the main motors connected in parallel and detecting the idling has not been adopted.

このような事情に鑑み、従来にあっては、非特許文献1に記載されているように差電圧方式による空転検知を行っていた。この非特許文献1の技術は、主電動機の空転検出をブリッジ回路に発生する電圧差によって行っている。すなわち、各主電動機ごとの端子電圧をブリッジ回路で検知して比較しており、正常に運転されている場合、主電動機間の電位差は等しく、空転が発生すると、空転が発生した主電動機の逆起電力は大きくなり、その分だけ電流は減少して差が生じ、空転を検出することができる。そして、それが一定値以上になると、空転検知継電器を動作させ、主電動機への電源の供給を遮断している。
特許出願公告昭和48年第22730号公報 関東鉄道学園 電車研究会著 「直流用 新形電車教本 関東鉄道学園編」 株式会社 交友社発行 昭和62年5月15日改訂増補第13版
In view of such circumstances, conventionally, as described in Non-Patent Document 1, idling detection by a differential voltage method has been performed. In the technique of Non-Patent Document 1, idling detection of the main motor is performed by a voltage difference generated in a bridge circuit. In other words, the terminal voltage for each main motor is detected and compared by a bridge circuit, and when operating normally, the potential difference between the main motors is equal, and when idling occurs, the reverse of the idling main motor occurs. The electromotive force increases, and the current decreases accordingly, and a difference is generated, so that idling can be detected. And if it becomes more than a fixed value, the idling detection relay is operated and the power supply to the main motor is cut off.
Patent Application Publication No. 22730 No. 1972 Kanto Railway Gakuen Train Study Group "New Train for Direct Current Kanto Railway Gakuen Hen" Issued by Koyusha Co., Ltd. May 15, 1987 Revision Supplement 13th Edition

ところが、前記差電圧方式の空転検知装置は、主電動機回路(高圧回路)の中へ組み込まなければならず、このことは装置が高圧回路に電気的に接触しているということであるため、主回路地絡事故などのリスクがあり、また大掛かりな改造工事となり、手間とコストがかかり、また高度の技術を要するという問題があった。
また非特許文献1の技術にあっては、空転が発生したときに主電動機の逆起電力は大きくなり、その分だけ電流が減少していくので、主電動機が中速領域で主抵抗器による速度制御を行っている場合と、高速領域で弱め界磁制御を行っている場合とでは、同一の速度差であっても逆起電力の大きさが異なる。そのため、弱め界磁制御段では、感度が低くなるという欠点があった。つまり、空転を確実に検知しなければならない弱め界磁制御段において感度が低下し、精度の高い空転検知ができないという問題もあった。
However, the differential voltage type idling detection device must be incorporated into the main motor circuit (high voltage circuit), which means that the device is in electrical contact with the high voltage circuit. There are risks such as circuit ground faults, large-scale remodeling work, labor and cost, and high technology.
In the technique of Non-Patent Document 1, when idling occurs, the back electromotive force of the main motor increases, and the current decreases accordingly, so that the main motor is driven by the main resistor in the middle speed region. The magnitude of the back electromotive force differs between the case where the speed control is performed and the case where the field weakening control is performed in the high speed region even if the speed difference is the same. For this reason, the field weakening control stage has a drawback that the sensitivity is lowered. That is, there is a problem that the sensitivity is lowered in the field-weakening control stage where the idling must be detected with certainty, and the idling cannot be detected with high accuracy.

本発明は従来の前記課題に鑑みてこれを改良除去したものであって、空転検知を確実に行う必要のある高速領域の弱め界磁制御段において、主電動機間の電流差による空転検知を行うことにより、装置の小型化、軽量化、電気的非接触化を図り、既存の高圧回路への外部的付加により装着できる主電動機の損傷防止装置を提供せんとするものである。   The present invention has been improved and removed in view of the above-described conventional problems, and by performing idling detection due to a current difference between main motors in a field weakening control stage in a high speed region where idling detection needs to be performed reliably. Therefore, the present invention aims to provide a main motor damage prevention device that can be mounted by external addition to an existing high-voltage circuit in order to reduce the size, weight, and electrical non-contact of the device.

而して、前記課題を解決するために本発明が採用した請求項1の手段は、低速域では複数の主電動機を直列に接続し、主抵抗器を切り替えて速度制御を行い、中速域では複数の主電動機を並列に接続し、主抵抗器を切り替えて速度制御を行い、高速域では複数の主電動機を並列に接続し、界磁抵抗を切り替えて速度制御を行う車両速度制御装置における空転による主電動機損傷防止装置であって、高速域の所定段階以上の速度制御を検知する手段と、主電動機の各並列回路に設置した電流計と、該電流計の出力値を比較する電流値比較回路と、該電流値比較回路の出力が所定値以上及びある一定時間継続のときに車輪の空転であると判断し、所定の制御信号を出力する制御回路とで構成したことを特徴とする空転による主電動機損傷防止装置である。   Thus, the means of claim 1 adopted by the present invention to solve the above problem is that the plurality of main motors are connected in series in the low speed range, the main resistor is switched, and the speed control is performed. In a vehicle speed control device that connects a plurality of main motors in parallel and switches the main resistor to perform speed control, and connects a plurality of main motors in parallel in a high speed range and switches the field resistance to perform speed control. An apparatus for preventing damage to a main motor due to idling, a means for detecting speed control at a predetermined level in a high speed range, an ammeter installed in each parallel circuit of the main motor, and a current value for comparing the output value of the ammeter A comparison circuit and a control circuit that determines that the wheel is idling when the output of the current value comparison circuit exceeds a predetermined value and continues for a certain period of time and outputs a predetermined control signal. Main motor damage prevention device due to idling A.

本発明が採用した請求項2の手段は、前記電流計がホールCTである請求項1に記載の空転による主電動機損傷防止装置である。   The means of claim 2 employed by the present invention is the apparatus for preventing damage to the main motor due to idling according to claim 1, wherein the ammeter is a hall CT.

本発明が採用した請求項3の手段は、高速域の所定段階以上の速度制御を検知する手段が、フォトセンサーによりカム軸の位置を検出するものである請求項1に記載の空転による主電動機損傷防止装置である。   The means according to claim 3 employed by the present invention is characterized in that the means for detecting speed control at a predetermined level or higher in the high speed range detects the position of the camshaft by a photo sensor. Damage prevention device.

本発明が採用した請求項4の手段は、高速域の所定段階以上の速度制御を検知する手段が、ホールCTにより界磁抵抗に流れる電流を検出するものである請求項1に記載の空転による主電動機損傷防止装置である。   According to a fourth aspect of the present invention, the means for detecting speed control at a predetermined level or higher in the high-speed region detects the current flowing through the field resistance by the Hall CT. It is a main motor damage prevention device.

請求項1の発明にあっては、車輪空転による主電動機の損傷及び架線停電の多くは、車輪に空転が発生し、主制御器内のカム軸が弱め界磁制御段まで進段することによって主電動機の異常高速回転でフラッシュオーバーが発生して起こることに着目したものである。すなわち、車両の速度制御が弱め界磁制御段等のある特定の段階のときに、主電動機に異常高速回転に伴う逆起電力の増大で、並列接続された主電動機間に電気子電流差を生じるので、これを基準値と比較し、継続時間を計測することにより、車輪空転と判断している。そして、これを運転士にランプ表示や警報等で知らせたり、力行回路を遮断することで主電動機の損傷を防止するようにしている。   In the first aspect of the invention, most of the damage to the main motor and the overhead power failure caused by the wheel slipping occur in the wheel, and the camshaft in the main controller advances to the field-weakening control stage to advance to the main motor. The focus is on flashover occurring at an abnormally high speed rotation. That is, when the vehicle speed control is in a specific stage such as a field weakening control stage, an increase in counter electromotive force due to abnormally high speed rotation in the main motor causes an electric current difference between the main motors connected in parallel. By comparing this with the reference value and measuring the duration, it is determined that the wheel is idling. Then, this is notified to the driver by a lamp display, an alarm or the like, or the power running circuit is cut off to prevent the main motor from being damaged.

従って、この請求項1の発明によれば、低速域及び中速域、並びに高速域のうち、弱め界磁制御段等の所定の段階に進段しない速度制御領域にあっては、空転が発生した場合であっても、主電動機が大空転とならずに直ぐに再粘着が得られれば、フラッシュオーバーによる主電動機の損傷事故及び架線の停電事故とはならないことが統計的にわかっているので、これらの速度領域における空転では対処しないこととしている。一方、空転が始まり、最終段まで進段した場合は、主電動機の損傷事故及び架線停電事故となる確率が高いので、この場合は空転検知装置を機能させて、前記主電動機の損傷事故及び架線の停電事故を防止するようにしたものである。   Therefore, according to the first aspect of the present invention, when idling occurs in a speed control region that does not advance to a predetermined step such as a field weakening control step among the low speed region, the medium speed region, and the high speed region. However, since it is statistically known that if the main motor does not rotate rapidly and re-adhesion is obtained immediately, it will not cause damage to the main motor due to flashover or power failure of the overhead line. It is decided not to deal with idling in the speed range. On the other hand, when idling starts and progresses to the final stage, there is a high probability that a main motor damage accident and overhead line power outage accident will occur.In this case, the idling detection device is operated and the main motor damage accident and overhead line accident occur. It is intended to prevent power outages.

請求項2の発明にあっては、主電動機の並列回路に設けた電流計をホールCTとしている。ホールCTは、ケーブルの外側からこれに外嵌装着することで、内部の誘起起電力により発生する電流値を比較し、空転を検知している。従って、空転検知装置の軽量小型化が可能であり、また高圧回路への組み込みも極めて容易である。   In the invention of claim 2, the ammeter provided in the parallel circuit of the main motor is the Hall CT. The hole CT is externally attached to the cable from the outside of the cable, thereby comparing the current values generated by the internal induced electromotive force and detecting idling. Therefore, the idling detection device can be reduced in weight and size, and can be incorporated into a high-voltage circuit very easily.

請求項3及び4の発明にあっては、フォトセンサーでカム軸の位置を検出したり、ホールCTで界磁抵抗に流れる電流を検出することで、弱め界磁制御段であることを検知しており、いずれも非接触方式であるので空転検知装置の車両への組み込みが容易である。   In the third and fourth aspects of the invention, the position of the camshaft is detected by a photo sensor, or the current flowing through the field resistance is detected by the hall CT, thereby detecting the field-weakening control stage. Since both are non-contact systems, the idling detection device can be easily incorporated into the vehicle.

以下に、本発明の構成を図面に示す発明の実施の形態に基づいて説明すると次の通りである。図1及び図2は本発明の一実施の形態に係るものであり、図1は車両の速度制御回路の全体を示す図面、図2は主電動機損傷防止装置の電気回路を示す図面である。図1に示す如く、この実施の形態にあっては、一両目に搭載された主電動機1〜4と、二両目に搭載された主電動機5〜8とは、直流モータであり、カム軸方式の切り替え器である接触器K2,K3,K4を切り替えることにより一両目と二両目との主電動機が直列接続されたり、又は並列接続されようになっている。低速域では主電動機1〜4と、5〜8が直列接続され、中速域及び高速域では並列接続される。   The configuration of the present invention will be described below based on the embodiment of the invention shown in the drawings. 1 and 2 relate to an embodiment of the present invention. FIG. 1 is a diagram showing an entire speed control circuit of a vehicle, and FIG. 2 is a diagram showing an electrical circuit of a main motor damage prevention device. As shown in FIG. 1, in this embodiment, the main motors 1 to 4 mounted on the first car and the main motors 5 to 8 mounted on the second car are direct current motors and are camshaft systems. By switching the contactors K2, K3, and K4 that are the switching devices, the first and second main motors are connected in series or in parallel. The main motors 1 to 4 and 5 to 8 are connected in series in the low speed range, and are connected in parallel in the medium speed range and the high speed range.

パンタグラフPanから供給される電源は、全回路過電流継電器MOCRを通り、直流モータ1〜8を経て、アース側へ流れる回路を形成する。すなわち、今、低速域であるとすると、接触器K2がON(閉)で、K3とK4はOFF(開)に切り替えられている。パンタグラフPanから供給される電源は、全回路過電流継電器MOCRから、主電動機回路過電流継電器MMOCR1、主電動機界磁コイルMF1〜4、主電動機電機子1〜4、接触器K2、K8、主電動機電機子5〜8、主電動機界磁コイルMF5〜8、直流電流計DCCT、接触器K9、アースへと流れる回路を形成する。このように、この低速域では、主電動機電機子1〜4と、5〜8は直列に接続されており、速度の増減は主抵抗器MRe1の抵抗カム接触器R12,13,14と、主抵抗器MRe2の抵抗カム接触器R22,23,24を随時短絡させて切り替えることで段階的な速度制御を行っている。   The power supplied from the pantograph Pan forms a circuit that flows to the ground side through the direct current motors 1 to 8 through the all circuit overcurrent relay MOCR. That is, if it is now in the low speed range, the contactor K2 is ON (closed), and K3 and K4 are switched OFF (open). The power supplied from the pantograph Pan is from the all circuit overcurrent relay MOCR, the main motor circuit overcurrent relay MMOCR1, the main motor field coils MF1 to MF4, the main motor armatures 1 to 4, the contactors K2 and K8, the main motor. The armature 5-8, the main motor field coils MF5-8, the DC ammeter DCCT, the contactor K9, and a circuit that flows to the ground are formed. Thus, in this low speed region, the main motor armatures 1 to 4 and 5 to 8 are connected in series, and the increase or decrease in speed is caused by the resistance cam contactors R12, 13, 14 of the main resistor MRe1, Stepwise speed control is performed by switching the resistance cam contactors R22, 23, 24 of the resistor MRe2 by short-circuiting at any time.

また車両の速度制御が中速域であるとすると、接触器K2はOFF(開)で、K3とK4はON(閉)に切り替えられている。パンタグラフPanから供給される電源は、全回路過電流継電器MOCRを経た後に、二つの並列回路に分岐される。その一つは、主電動機回路過電流継電器MMOCR1から主電動機界磁コイルMF1〜4、主電動機電機子1〜4、接触K4を経てアースへ流れる回路を形成する。他方の分岐回路は、主電動機回路過電流継電器MMOCR2から接触器K3、接触K8、主電動機電機子5〜8、主電動機界磁コイルMF5〜8、直流電流計DCCT、接触器K9、アースへと流れる回路を形成する。つまり、この中速域では、主電動機電機子1〜4を通る回路と、主電動機電機子5〜8を通る回路とは並列回路を形成することになる。そして、主電動機電機子1〜4における速度制御は、抵抗カム接触器R12,13,14を随時短絡させて切り替えることで行われ、主電動機電機子5〜8における速度制御は、抵抗カム接触器R22,23,24を随時短絡させて切り替えることで行われる。   If the vehicle speed control is in the middle speed range, the contactor K2 is OFF (open), and K3 and K4 are switched ON (closed). The power supplied from the pantograph Pan is branched into two parallel circuits after passing through the entire circuit overcurrent relay MOCR. One of them forms a circuit that flows from the main motor circuit overcurrent relay MMOCR1 to the ground through the main motor field coils MF1 to MF4, the main motor armatures 1 to 4, and the contact K4. The other branch circuit is from main motor circuit overcurrent relay MMOCR2 to contactor K3, contact K8, main motor armatures 5-8, main motor field coils MF5-8, DC ammeter DCCT, contactor K9, and ground. A flowing circuit is formed. That is, in this medium speed range, the circuit passing through the main motor armatures 1 to 4 and the circuit passing through the main motor armatures 5 to 8 form a parallel circuit. Then, the speed control in the main motor armatures 1 to 4 is performed by switching the resistance cam contactors R12, 13, and 14 as necessary, and the speed control in the main motor armatures 5 to 8 is performed by the resistance cam contactor. This is performed by switching R22, 23, 24 by short-circuiting at any time.

更に、車両の速度制御が高速域であるとすると、主電動機1〜4と、5〜8の並列回路の構成は同じであるが、速度制御の方法が主抵抗器MRe1及びMRe2を短絡するために、抵抗カム接触器R12,13,14と、R22,23,24の切り替えを行うのではなく、界磁分流抵抗器を短絡するために、界磁弱めカム接触器F11〜14と、界磁弱めカム接触器F21〜24を段階的に切り替えて各並列回路における主電動機電機子1〜4又は5〜8の段階的な速度制御を行うようにしている。いわゆる弱め界磁制御となる。   Further, assuming that the speed control of the vehicle is in the high speed range, the configuration of the parallel circuits of the main motors 1 to 4 and 5 to 8 is the same, but the speed control method shorts the main resistors MRe1 and MRe2. In addition, instead of switching between the resistance cam contactors R12, 13, 14 and R22, 23, 24, in order to short-circuit the field shunt resistor, the field weakening cam contactors F11-14, The weakening cam contactors F21-24 are switched stepwise to perform stepwise speed control of the main motor armatures 1-4 or 5-8 in each parallel circuit. This is so-called field weakening control.

このように構成された車両の速度制御装置において、空転が発生した場合に、大空転に至り、主電動機のフラッシュオーバーによる損傷事故、架線の停電事故となる虞れがあるのは、車両が高速域の弱め界磁制御段まで進段した場合のみである。そのため、この実施の形態では、車両が高速域の弱め界磁制御段まで進段した状態で、空転が継続している場合に限って、空転に対する対処を行うようにしている。低速域や中速域において空転を検知し、これに対処した場合は、却って車両の復旧に手間と時間を要し、列車遅延や運行ダイヤの乱れとなるからである。   In the vehicle speed control apparatus configured as described above, when the idling occurs, the idling of the main motor may cause a damage accident due to a flashover of the main motor or a power failure accident of the overhead line. This is only the case where the step proceeds to the field-weakening field control stage. For this reason, in this embodiment, a countermeasure against idling is performed only when idling continues while the vehicle has advanced to the field-weakening control stage in the high speed range. This is because if idling is detected in the low speed range or the medium speed range and this is dealt with, it takes time and effort to restore the vehicle, resulting in train delays and disruption of operation schedules.

そのための構成として、この実施の形態にあっては、ケーブルに外嵌装着するだけの簡単な装着でケーブルを流れる電流値の測定が可能なホールCTの電流計を、各主電動機1〜4と、5〜8のそれぞれの並列回路の途中に組み入れている。各ホールCTの出力信号CT1,CT2は、図2に示す比較回路及び判定回路並びに弱め界磁制御段の検出回路によって、制御を必要とする空転か、見過ごすべき空転かの判定がなされるようになっている。すなわち、ホールCTの出力信号CT1,CT2は、演算比較回路で両信号の差が検知される。そして、この差の絶対値を取り出し、これを基準値設定回路で設定した基準値と比較し、基準値よりも大きい場合で、且つカム軸が弱め界磁制御段に進段している場合には、AND素子により制御すべき空転であると判断してHレベル出力をするようになっている。   As a configuration for this, in this embodiment, a Hall CT ammeter capable of measuring the value of the current flowing through the cable by simply fitting the cable to the cable is connected to each of the main motors 1 to 4. , 5 to 8 are incorporated in the middle of each parallel circuit. The output signals CT1 and CT2 of each hall CT can be determined as to whether they need to be controlled or overlooked by the comparison circuit and determination circuit shown in FIG. 2 and the detection circuit of the field weakening control stage. Yes. That is, the difference between both signals of the output signals CT1 and CT2 of the hall CT is detected by the arithmetic comparison circuit. Then, the absolute value of this difference is taken out and compared with the reference value set by the reference value setting circuit.If the difference is larger than the reference value and the camshaft is advanced to the field weakening control stage, It is determined that the idling should be controlled by the AND element, and the H level is output.

なお、前記弱め界磁制御段の検知回路では、フォトセンサーを利用して弱め界磁制御段であるか否かの検知を行っているが、これはホールCTを用いて界磁分流抵抗器へ流れる電流を検出することで検知することも可能である。また判定回路では、CT1とCT2との電流差を基準値と比較して基準値以上であれば、Hレベル出力し、このHレベル出力と弱め界磁制御段の検知信号とが入力されたときに、アンド素子によって制御信号を出力するようにしている。その一つとして、力行回路を自動的にOFFにすることが考えられる。また別な方法としては、ランプ表示や警告音等により運転手に通知し、速度を低減させる運転操作を促すことが考えられる。   The detection circuit of the field weakening control stage detects whether the field weakening control stage is using a photo sensor, but this detects the current flowing to the field shunt resistor using Hall CT. It is also possible to detect by doing. The determination circuit compares the current difference between CT1 and CT2 with a reference value and outputs an H level if it is equal to or greater than the reference value. When this H level output and the detection signal of the field weakening control stage are input, A control signal is output by an AND element. As one of them, it is conceivable to automatically turn off the power running circuit. As another method, it is conceivable to notify the driver by a lamp display, a warning sound, or the like, and to prompt a driving operation to reduce the speed.

このように本実施の形態にあっては、車両の速度制御が弱め界磁制御段へ進段した状態で、空転が検出されたときにのみ、これに対処するようにしており、主電動機のフラッシュオーバーによる損傷事故や架線の停電事故を防止することが可能である。また空転を検出するための装置は、高圧回路の中へ組み込む必要がなく、外部から付加するのみの簡単な作業で実現でき、その構成も演算比較回路や判定回路、基準値比較回路、AND素子等のように小型の素子を利用して実現できるので、軽量小型なものとなる。
一方、このような大掛かりな事故に至ることのない空転についてはこれを見過ごし、列車遅延や運行ダイヤの乱れが生じないように対処している。
As described above, in the present embodiment, only when idling is detected in a state where the speed control of the vehicle has advanced to the field weakening control stage, this is dealt with. It is possible to prevent damage accidents caused by spillovers and power outage accidents on overhead lines. In addition, the device for detecting idling does not need to be incorporated into the high-voltage circuit, and can be realized by a simple operation that is added from the outside. The configuration is also an arithmetic comparison circuit, a determination circuit, a reference value comparison circuit, an AND element. As described above, it can be realized by using a small element, so that it is lightweight and small.
On the other hand, we have overlooked the idling that does not lead to such a major accident, and we are dealing with it so that train delays and bus schedule disruptions do not occur.

本発明の一実施の形態に係る車両速度制御装置の全体を示す回路図である。1 is a circuit diagram showing an entire vehicle speed control apparatus according to an embodiment of the present invention. 本発明の一実施の形態に係る主電動機損傷防止装置の回路図である。1 is a circuit diagram of a main motor damage preventing apparatus according to an embodiment of the present invention.

符号の説明Explanation of symbols

1〜8…主電動機電機子、K2〜4…接触器、R12〜14及びR22〜24…抵抗カ ム接触器、F11〜14及びF22〜24…界磁弱めカム接触器、MOCR…全回路過 電流継電器、MOCR1及びMOCR2…主電動機回路過電流継電器
1-8 ... Main motor armature, K2-4 ... Contactor, R12-14 and R22-24 ... Resistance cam contactor, F11-14 and F22-24 ... Field weakening cam contactor, MOCR ... Overall circuit Current relay, MOCR1 and MOCR2 ... Main motor circuit overcurrent relay

Claims (4)

低速域では複数の主電動機を直列に接続し、主抵抗器を切り替えて速度制御を行い、中速域では複数の主電動機を並列に接続し、主抵抗器を切り替えて速度制御を行い、高速域では複数の主電動機を並列に接続し、界磁抵抗を切り替えて速度制御を行う車両速度制御装置における空転による主電動機損傷防止装置であって、高速域の所定段階以上の速度制御を検知する手段と、主電動機の各並列回路に設置した電流計と、該電流計の出力値を比較する電流値比較回路と、該電流値比較回路の出力が所定値以上及びある一定時間継続のときに車輪の空転であると判断し、所定の制御信号を出力する制御回路とで構成したことを特徴とする空転による主電動機損傷防止装置。 In the low speed range, multiple main motors are connected in series and the main resistor is switched for speed control.In the medium speed range, multiple main motors are connected in parallel and the main resistor is switched for speed control. This is a main motor damage prevention device due to idling in a vehicle speed control device that connects a plurality of main motors in parallel and switches field resistance to perform speed control, and detects speed control at a predetermined level or higher in the high speed range. Means, an ammeter installed in each parallel circuit of the main motor, a current value comparison circuit for comparing the output value of the ammeter, and when the output of the current value comparison circuit exceeds a predetermined value and continues for a certain period of time An apparatus for preventing damage to a main motor caused by idling, comprising: a control circuit that determines that the wheel is idling and outputs a predetermined control signal. 前記電流計がホールCTである請求項1に記載の空転による主電動機損傷防止装置。 The main motor damage prevention device by idling according to claim 1, wherein the ammeter is a hall CT. 高速域の所定段階以上の速度制御を検知する手段が、フォトセンサーによりカム軸の位置を検出するものである請求項1に記載の空転による主電動機損傷防止装置。 2. The apparatus for preventing damage to a main motor due to idling according to claim 1, wherein the means for detecting speed control at a predetermined level or higher in the high speed range detects the position of the camshaft by a photo sensor. 高速域の所定段階以上の速度制御を検知する手段が、ホールCTにより界磁抵抗に流れる電流を検出するものである請求項1に記載の空転による主電動機損傷防止装置。
2. The apparatus for preventing damage to a main motor due to idling according to claim 1, wherein the means for detecting speed control at a predetermined level or higher in the high speed range detects a current flowing through the field resistance by the hall CT.
JP2004096042A 2004-03-29 2004-03-29 Device for preventing damage of main motor due to idling Withdrawn JP2005287153A (en)

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