JPH11355910A - Power converting device for electric car - Google Patents
Power converting device for electric carInfo
- Publication number
- JPH11355910A JPH11355910A JP10160184A JP16018498A JPH11355910A JP H11355910 A JPH11355910 A JP H11355910A JP 10160184 A JP10160184 A JP 10160184A JP 16018498 A JP16018498 A JP 16018498A JP H11355910 A JPH11355910 A JP H11355910A
- Authority
- JP
- Japan
- Prior art keywords
- power converter
- induction motor
- power converting
- negative electrode
- converting device
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Landscapes
- Inverter Devices (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、電気車用電力変換
装置に係り、特に電力変換装置が発生する高調波障害を
抑制する技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power converter for an electric vehicle, and more particularly to a technique for suppressing a harmonic disturbance generated by the power converter.
【0002】[0002]
【従来の技術】従来の直流電気車における接地回路とし
ては、特開昭62−213501号に見られるように、電力変換
装置の直流側負極は一旦車体に接地されてから、接地装
置に接続されている。2. Description of the Related Art As a grounding circuit in a conventional DC electric car, as shown in Japanese Patent Application Laid-Open No. 62-213501, the DC side negative electrode of a power conversion device is once grounded to a vehicle body and then connected to a grounding device. ing.
【0003】[0003]
【発明が解決しようとする課題】電力変換装置が半導体
スイッチング素子により、入力の直流電圧をスイッチン
グして、そのスイッチング時間の制御により、出力する
交流電圧の周波数や電圧を制御する構成の場合、スイッ
チングによる急峻な電圧変化により高調波電流が電力変
換装置から流出し、時として電気車に搭載される電子機
器や無線機器等に障害を及ぼす。In the case where the power converter is configured to switch the input DC voltage by the semiconductor switching element and control the frequency and voltage of the output AC voltage by controlling the switching time, Harmonic current flows out of the power conversion device due to a sharp voltage change caused by the above, and sometimes causes a failure in electronic devices and wireless devices mounted on the electric vehicle.
【0004】図3は従来の電気車用電力変換装置の接地
回路の構成を示したものである。架線41から集電装置
1を介して取り込まれた電源43の直流電力は、遮断器
2、及びフィルタリアクトル3を介して電力変換装置8
の直流側正極に接続される。電力変換装置の直流側正極
と負極の間にはフィルタコンデンサ4は接続され、フィ
ルタリアクトル3とフィルタコンデンサ4によりフィル
タ回路を構成している。FIG. 3 shows a configuration of a ground circuit of a conventional electric power converter for electric vehicles. The DC power of the power supply 43 taken in from the overhead line 41 via the current collector 1 is supplied to the power converter 8 via the circuit breaker 2 and the filter reactor 3.
Is connected to the DC side positive electrode. A filter capacitor 4 is connected between the positive electrode and the negative electrode on the DC side of the power converter, and the filter reactor 3 and the filter capacitor 4 constitute a filter circuit.
【0005】直流を交流に変換する電力変換装置8とし
ては、半導体スイッチング素子のIGBT11〜16に
よる3相インバータで構成され、その交流出力は、3相
誘導電動機5に接続される。[0005] The power conversion device 8 for converting DC to AC is constituted by a three-phase inverter composed of semiconductor switching elements IGBTs 11 to 16, and its AC output is connected to the three-phase induction motor 5.
【0006】電力変換装置8の直流側負極は、接地端子
台6で車体に接地された後、接地装置7に接続されレー
ル42を介して電源43の負極へ接続される。[0006] The DC side negative electrode of the power converter 8 is grounded to the vehicle body by the ground terminal block 6, then connected to the grounding device 7 and connected to the negative electrode of the power supply 43 via the rail 42.
【0007】ここで、電力変換装置8の出力する交流電
圧を考える。Here, the AC voltage output from the power converter 8 is considered.
【0008】電力変換装置8はIGBT11〜16のス
イッチング時間の制御により交流電圧を生成しているた
め、交流電圧は矩形状となり、IGBTのスイッチング
時には電力変換装置8の交流出力点の電位が、直流電源
43の電位と、車体の電位とに変化する。[0008] Since the power converter 8 generates an AC voltage by controlling the switching time of the IGBTs 11 to 16, the AC voltage has a rectangular shape. When the IGBT is switched, the potential of the AC output point of the power converter 8 becomes DC. The potential of the power supply 43 changes to the potential of the vehicle body.
【0009】この場合、電力変換装置8と誘導電動機5
を接続する電線と、車体との間には電線の被覆に浮遊容
量21〜23が存在し、また、誘導電動機5にはコイル
の絶縁体に浮遊容量24が存在する。このため、電力変
換装置8の交流出力点の車体に対する電位が変化する
と、高調波電流が浮遊容量21〜24を通って流出し、
迷走電流31,32となって車体を流れる。In this case, the power converter 8 and the induction motor 5
And the vehicle body, there are stray capacitances 21 to 23 in the electric wire covering, and the induction motor 5 has a stray capacitance 24 in the coil insulator. Therefore, when the potential of the AC output point of the power converter 8 with respect to the vehicle body changes, the harmonic current flows out through the stray capacitances 21 to 24,
Stray currents 31 and 32 flow through the vehicle body.
【0010】この迷走電流が、電子機器や無線機器等へ
悪影響を与えていた。[0010] The stray current adversely affects electronic devices, wireless devices, and the like.
【0011】IGBTの半導体スイッチング素子に代表
されるように、近年の半導体の進歩により半導体スイッ
チング素子のスイッチング速度は高速化し、電力変換装
置の低騒音化,低損失化をもたらしたが、一方では交流
出力点の電圧変化が急峻になり、上記した迷走電流の流
出が増加して、これによる障害が大きな問題となってき
た。As typified by IGBT semiconductor switching elements, recent semiconductor advances have increased the switching speed of semiconductor switching elements, and have resulted in lower noise and lower loss in power converters. The voltage change at the output point becomes steep, and the outflow of the stray current described above increases.
【0012】本発明は、この高調波電流の流出による、
電子機器,無線機器等への障害を抑制できる電力変換装
置を提供することにある。The present invention is based on this outflow of harmonic current.
An object of the present invention is to provide a power conversion device capable of suppressing an obstacle to an electronic device, a wireless device and the like.
【0013】[0013]
【課題を解決するための手段】上記問題は、電力変換装
置と誘導電動機を接続する電線や、誘導電動機のコイル
に存在する浮遊容量を介して高調波電流が流出し、車体
を迷走電流として流れることにある。SUMMARY OF THE INVENTION The above-mentioned problem is caused by the fact that harmonic current flows out through electric wires connecting the power converter and the induction motor and stray capacitance existing in the coil of the induction motor and flows through the vehicle body as stray current. It is in.
【0014】高調波電流は、図3の迷走電流31,32
に示すように、元をたどれば電力変換装置8がその発生
源であることから、流出した迷走電流31,32は電力
変換装置8へ戻ってくる。The harmonic currents are represented by stray currents 31 and 32 in FIG.
As shown in (1), the stray currents 31 and 32 that have flowed out return to the power conversion device 8 because the power conversion device 8 is the generation source if the source is traced back.
【0015】そこで、上記問題の解決は、電線や誘導電
動機から流出した高調波電流を、車体よりも流れやすい
経路を設けて電力変換装置に戻すことにより、車体に迷
走電流が流れることを抑制することにより達成される。[0015] In order to solve the above-mentioned problem, a stray current is suppressed from flowing into the vehicle body by providing a path through which the harmonic current flowing out of the electric wire or the induction motor flows more easily than the vehicle body and returning the harmonic current to the power converter. This is achieved by:
【0016】[0016]
【発明の実施の形態】以下、本発明の実施形態を図面を
用いて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【0017】図1は本発明の実施例を示す車両用電力変
換装置の接地回路である。なお、同図の構成における符
号は図3で示した同一符号とは同じ物であり、また、車
両用電力変換装置の主たる構成は図3と同じであるので
その説明は省略する。FIG. 1 shows a grounding circuit of a vehicle power converter according to an embodiment of the present invention. Note that the reference numerals in the configuration of FIG. 6 are the same as the same reference numerals shown in FIG.
【0018】図3と異なるところは、電力変換装置8の
直流側負極から誘導電動機のケース間を接続する電線5
0は、電力変換装置8の交流側出力と誘導電動機5を接
続する3相の線と寄り合わせて配線し、電力変換装置の
直流側負極と誘導電動機5のケースが電気的に接続され
ている。また、誘導電動機のケースと接地装置7とは、
電線60により接続され、接地装置はレール42に接続
されているので、誘導電動機のケースとレール間は電気
的に接続されていることになる。The difference from FIG. 3 is that an electric wire 5 is connected between the negative electrode on the DC side of the power converter 8 and the case of the induction motor.
Numeral 0 is wired so as to be close to a three-phase line connecting the AC output of the power converter 8 and the induction motor 5, and the DC negative electrode of the power converter and the case of the induction motor 5 are electrically connected. . The case of the induction motor and the grounding device 7 are
Since it is connected by the electric wire 60 and the grounding device is connected to the rail 42, the case of the induction motor and the rail are electrically connected.
【0019】図1の方式では、電力変換装置8の交流側
出力の3相線は、電力変換装置8の直流側負極からの電
線と寄り合わせて相互の容量的な結合が強くなることよ
り、3相線から流出する高調波電流は積極的に電力変換
装置8へ戻るので、これにより高調波電流の車体への流
出を抑制する作用をすることになる。また、誘導電動機
5のケースを電力変換装置8の直流側負極からの電線に
接続することにより、誘導電動機5のコイルの浮遊容量
を介してケースまで流出してきた高調波電流を積極的に
電力変換装置8に戻すことにもなり、これにより車体へ
の高調波電流の流出を抑制する作用をすることになる。In the system shown in FIG. 1, the three-phase line on the AC side output of the power converter 8 is closer to the electric wire from the negative electrode on the DC side of the power converter 8 so that the mutual capacitive coupling becomes stronger. Since the harmonic current flowing out of the three-phase line returns to the power converter 8 positively, this serves to suppress the harmonic current flowing out of the vehicle body. In addition, by connecting the case of the induction motor 5 to the electric wire from the negative electrode on the DC side of the power converter 8, the harmonic current flowing out to the case via the stray capacitance of the coil of the induction motor 5 is positively converted to power. It is also returned to the device 8, which acts to suppress the outflow of the harmonic current to the vehicle body.
【0020】図2は本発明の他の実施例であり、図1と
異なるところは次の点である。電力変換装置8と誘導電
動機5の接続にシールド線51を用い、シールド線51
の芯線は電力変換装置8の交流側出力と誘導電動機5の
接続に用い、シールド線51のシールド部は電力変換装
置8の直流側負極と誘導電動機5のケースとの接続の一
部に用いる。このシールド線を用いることにより、電力
変換装置8の交流側出力の3相線と、電力変換装置8の
直流側負極からの電線との容量的な結合を強くすること
で、3相線から流出する高調波電流を積極的に電力変換
装置8へ戻し、高調波電流の車体への流出を抑制する作
用をさせる。この作用は図1の実施例による作用より大
きなものが期待できる。FIG. 2 shows another embodiment of the present invention, which differs from FIG. 1 in the following point. The shielded wire 51 is used to connect the power converter 8 and the induction motor 5.
Is used for connection between the AC output of the power converter 8 and the induction motor 5, and the shield part of the shield wire 51 is used for part of the connection between the DC negative electrode of the power converter 8 and the case of the induction motor 5. By using this shielded wire, the capacitive coupling between the three-phase line on the AC side output of the power converter 8 and the wire from the negative electrode on the DC side of the power converter 8 is strengthened, so that the three-phase line flows out of the three-phase line. The active harmonic current is positively returned to the power conversion device 8 to suppress the outflow of the harmonic current to the vehicle body. This operation can be expected to be larger than that of the embodiment of FIG.
【0021】なお、図2の実施例では、電力変換装置8
の直流側負極と誘導電動機5のケース間をシールド線の
シールド部を一部とする電線で接続したが(図示しない
が)、電力変換装置8の直流側負極と誘導電動機5のケ
ース間を電線で直接的に接続し、その電線にシールド線
のシールド部を電気的に接続しても、図2と同じ効果が
得られる。In the embodiment shown in FIG. 2, the power converter 8
The DC side negative electrode and the case of the induction motor 5 were connected by an electric wire (not shown) with the shield part of the shield wire as a part, but an electric wire was connected between the DC side negative electrode of the power converter 8 and the case of the induction motor 5. 2, the same effect as in FIG. 2 can be obtained.
【0022】[0022]
【発明の効果】以上説明したように、本発明によれば、
電気車用電力変換装置において、電力変換装置と誘導電
動機間の配線や、誘導電動機から流出する高調波電流を
抑制し、車体を流れる迷走電流を抑制することにより、
電子機器や信号機器等に与える障害を抑制できるという
効果が得られる。As described above, according to the present invention,
In an electric vehicle power converter, wiring between the power converter and the induction motor, and suppressing the harmonic current flowing out of the induction motor, and suppressing the stray current flowing through the vehicle body,
The effect is obtained that it is possible to suppress the trouble to be given to the electronic equipment and the signal equipment.
【図1】本発明の一実施例を示す電力変換装置の接地回
路。FIG. 1 is a ground circuit of a power conversion device according to an embodiment of the present invention.
【図2】本発明の他の実施例を示す電力変換装置の接地
回路。FIG. 2 is a ground circuit of a power conversion device according to another embodiment of the present invention.
【図3】従来の電気車用電力変換装置の接地回路。FIG. 3 is a ground circuit of a conventional electric power converter for electric vehicles.
1…集電装置、2…接触器、3…フィルタリアクトル、
4…フィルタコンデンサ、5…誘導電動機、7…接地装
置、8…電力変換装置、11〜16…半導体スイッチン
グ素子(IGBT)、41…架線、42…レール、43
…直流電源、50,60…電線、51…シールド線。DESCRIPTION OF SYMBOLS 1 ... Current collector, 2 ... Contactor, 3 ... Filter reactor,
DESCRIPTION OF SYMBOLS 4 ... Filter capacitor, 5 ... Induction motor, 7 ... Grounding device, 8 ... Power conversion device, 11-16 ... Semiconductor switching element (IGBT), 41 ... Overhead wire, 42 ... Rail, 43
... DC power supply, 50, 60 ... electric wire, 51 ... shielded wire.
Claims (2)
ング制御することにより直流電圧を交流電圧に変換する
電力変換装置の直流側正極が、集電装置を介して直流電
源の正極に接続され、前記電力変換装置の直流側負極
が、接地装置を介して直流電源の負極に接続され、前記
電力変換装置の交流側出力は電気車駆動用の誘導電動機
が接続されてなる電気車用電力変換装置において、 前記電力変換装置の直流側負極と前記誘導電動機のケー
ス、及び前記誘導電動機のケースと前記接地装置がそれ
ぞれ電線により接続されると共に、前記電力変換装置の
直流側負極と前記誘導電動機のケース間の前記電線が、
前記電力変換装置の交流側出力と前記誘導電動機間の電
線に寄り合わせて配線されてなることを特徴とする電気
車用電力変換装置。1. A power converter for converting a DC voltage to an AC voltage by switching-controlling a plurality of semiconductor switching elements, wherein a DC-side positive electrode is connected to a positive electrode of a DC power supply via a current collector. In a power converter for an electric vehicle, a DC negative electrode of the device is connected to a negative electrode of a DC power supply via a grounding device, and an AC output of the power converter is connected to an induction motor for driving an electric vehicle. The DC-side negative electrode of the power converter and the case of the induction motor, and the case of the induction motor and the grounding device are connected by wires, respectively, and between the DC-side negative electrode of the power converter and the case of the induction motor. The wire is
A power converter for an electric vehicle, wherein the power converter is wired close to an electric wire between an AC output of the power converter and the induction motor.
流側負極と前記誘導電動機のケース間の電線が、シール
ド線のシールド部であり、前記電力変換装置の交流側出
力と前記誘導電動機の電線が前記シールド線の芯線を用
いたことを特徴とする電気車用電力変換装置。2. The power converter according to claim 1, wherein the electric wire between the negative electrode on the DC side of the power converter and the case of the induction motor is a shield part of a shielded wire, and the AC output of the power converter and the output of the induction motor are connected. An electric vehicle power converter, wherein an electric wire uses the core wire of the shielded wire.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10160184A JPH11355910A (en) | 1998-06-09 | 1998-06-09 | Power converting device for electric car |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10160184A JPH11355910A (en) | 1998-06-09 | 1998-06-09 | Power converting device for electric car |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11355910A true JPH11355910A (en) | 1999-12-24 |
Family
ID=15709651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10160184A Pending JPH11355910A (en) | 1998-06-09 | 1998-06-09 | Power converting device for electric car |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11355910A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006311697A (en) * | 2005-04-28 | 2006-11-09 | Hitachi Ltd | Brushless motor system |
EP3785977A1 (en) * | 2019-08-30 | 2021-03-03 | Hitachi, Ltd. | Railway vehicle |
-
1998
- 1998-06-09 JP JP10160184A patent/JPH11355910A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006311697A (en) * | 2005-04-28 | 2006-11-09 | Hitachi Ltd | Brushless motor system |
US8198847B2 (en) | 2005-04-28 | 2012-06-12 | Hitachi, Ltd. | Brushless motor system |
EP3785977A1 (en) * | 2019-08-30 | 2021-03-03 | Hitachi, Ltd. | Railway vehicle |
JP2021036742A (en) * | 2019-08-30 | 2021-03-04 | 株式会社日立製作所 | Railway vehicle |
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