JPH0951604A - Power supplying device of electric car - Google Patents
Power supplying device of electric carInfo
- Publication number
- JPH0951604A JPH0951604A JP7202546A JP20254695A JPH0951604A JP H0951604 A JPH0951604 A JP H0951604A JP 7202546 A JP7202546 A JP 7202546A JP 20254695 A JP20254695 A JP 20254695A JP H0951604 A JPH0951604 A JP H0951604A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- contactor
- circuit
- load
- short
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
- Inverter Devices (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、インバータ出力
を負荷に供給する電気車の電力供給装置の改良に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a power supply device for an electric vehicle that supplies an inverter output to a load.
【0002】[0002]
【従来の技術】従来の電気車の電力供給装置は図3に示
すように構成されていた。即ち、インバータ1の出力は
接触器2及び交流電圧検出器である交流低電圧検出器
(ACLVD)3に供給される。接触器2に供給された
インバータ1からの出力電力は、配線用遮断器4を介し
て負荷5に供給される。インバータ1はその起動後の通
流率(イ)及び出力電圧(ロ)はソフトスタートと称
し、図4に示すように時間の経過に伴い徐々に立上がる
緩やかな特性を示す。2. Description of the Related Art A conventional electric vehicle power supply apparatus is constructed as shown in FIG. That is, the output of the inverter 1 is supplied to the contactor 2 and an AC low voltage detector (ACLVD) 3 which is an AC voltage detector. The output power from the inverter 1 supplied to the contactor 2 is supplied to the load 5 via the wiring breaker 4. The inverter 1 has a conduction ratio (a) and an output voltage (b) after the startup, which is referred to as a soft start, and has a gradual characteristic that gradually rises with time as shown in FIG.
【0003】一方、交流低電圧検出器3はインバータ1
の起動後の出力電圧(ロ)を検出し、動作が確立したこ
とを示す規定電圧値(V)に到達したことを検知し(時
間T1)、接触器2に投入信号を供給する。投入信号を
受けた接触器2が投入動作に入る(時間T2)ことによ
り、インバータ1は、配線用遮断器4を介して負荷5に
接続されるから、インバータ1から負荷5には図4に示
すような出力電流(ハ)が供給される。On the other hand, the AC low voltage detector 3 is an inverter 1
The output voltage (b) after the start-up is detected, and it is detected that the specified voltage value (V) indicating that the operation is established is reached (time T1), and the closing signal is supplied to the contactor 2. When the contactor 2 receiving the closing signal enters the closing operation (time T2), the inverter 1 is connected to the load 5 via the circuit breaker 4 for wiring. The output current (c) as shown is supplied.
【0004】従って、接触器2の投入時(T2)におい
て、もしも負荷5が短絡故障や地絡故障している場合
は、図5に示すように、通流率(イ)に見合った短絡負
荷電流(ニ)が流れる。その短絡負荷電流(ニ)の値が
過電流設定レベル(I)を越えたとき、図示しない過電
流保護回路が作動して、インバータ1は動作停止状態と
なるよう制御される。なお、配線用遮断器4は過電流ヒ
ューズを有し、一定時間定格値を越える電流が流れたと
きにヒューズが溶断し遮断動作が作動する。Therefore, if the load 5 has a short-circuit fault or a ground fault at the time of turning on the contactor 2 (T2), as shown in FIG. 5, a short-circuit load commensurate with the conduction ratio (a). An electric current (2) flows. When the value of the short-circuit load current (d) exceeds the overcurrent setting level (I), an overcurrent protection circuit (not shown) is activated and the inverter 1 is controlled to be in an operation stop state. The circuit breaker 4 for wiring has an overcurrent fuse. When a current exceeding a rated value flows for a certain period of time, the fuse is blown and the breaking operation is activated.
【0005】いずれにしても、インバータ1が一旦動作
停止した後に再起動し、出力電圧が規定電圧値(V)に
達するまでの間は、交流低電圧検出器(ACLVD)3
は、投入信号を導出しないので、インバータ1出力が配
線用遮断器4及び負荷5へ供給されることはない。In any case, the AC low voltage detector (ACLVD) 3 is operated until the inverter 1 is once stopped and then restarted until the output voltage reaches the specified voltage value (V).
Does not derive the closing signal, the output of the inverter 1 is not supplied to the circuit breaker 4 for wiring and the load 5.
【0006】[0006]
【発明が解決しようとする課題】電気車の電力供給装置
は、上述のように負荷5の短絡故障発生時は過電流保護
回路が作動しインバータ1が動作停止する。しかし従来
の装置は、インバータ1が再起動したとき、交流低電圧
検出器3がインバータ出力が規定電圧値(V)まで到達
したことを検知し、接触器2へ投入動作信号を供給する
から、インバータ1出力は短絡故障の負荷5に接続され
た状態となり、再び過電流保護回路が動作し、インバー
タ1は再度停止状態となる。As described above, in the power supply device for an electric vehicle, the overcurrent protection circuit operates and the inverter 1 stops operating when a short-circuit failure occurs in the load 5. However, in the conventional device, when the inverter 1 is restarted, the AC low voltage detector 3 detects that the inverter output has reached the specified voltage value (V), and supplies the closing operation signal to the contactor 2. The output of the inverter 1 is connected to the load 5 having the short-circuit fault, the overcurrent protection circuit operates again, and the inverter 1 is stopped again.
【0007】このように、インバータ1自体は何等故障
をしていないのにも拘らず、負荷5の短絡故障などによ
り一旦短絡電流が流れると、それ以降は正常動作に移行
できずロックアウト(rock out)に陥る。特に
インバータ1が複数並列接続の負荷に電力を供給するシ
ステム構成では、1個の負荷の短絡事故が、直ちに正常
な他の負荷への電力供給不能をもたらし、車両システム
全体の運行不能にもつながるので改善が要望されいた。As described above, although the inverter 1 itself has not failed, once a short-circuit current flows due to a short-circuit failure of the load 5 or the like, normal operation cannot be performed thereafter, and lockout (rockout) is performed. out). In particular, in a system configuration in which the inverter 1 supplies electric power to a plurality of parallel-connected loads, a short-circuit accident in one load immediately causes a normal electric power supply to another load, which leads to an inoperability of the entire vehicle system. Therefore, improvement was requested.
【0008】[0008]
【課題を解決するための手段】この発明による電気車の
電力供給装置は、上記従来の課題を解決するもので、直
流を交流に変換するインバータと、このインバータに接
続された接触器と、この接触器に接続された配線用遮断
器と、この配線用遮断器に接続された負荷と、前記イン
バータからの出力信号を導入し前記接触器の投入動作制
御信号を前記インバータ作動中供給する制御器とを具備
することを特徴とする。SUMMARY OF THE INVENTION A power supply device for an electric vehicle according to the present invention solves the above-mentioned problems of the prior art. An inverter for converting direct current into alternating current, a contactor connected to the inverter, and A circuit breaker connected to the contactor, a load connected to the circuit breaker, and a controller for introducing an output signal from the inverter and supplying a closing operation control signal for the contactor during operation of the inverter. And is provided.
【0009】上記のようにこの発明による電気車の電力
供給装置は、新たに制御器を設け、制御器が前記インバ
ータからの出力信号を導入して接触器に供給するので、
インバータが再起動中にあっても、接触器を投入状態に
維持することができる。従って、短絡事故が発生しイン
バータが再起動した場合、接触器は投入状態を維持する
ので、インバータ出力電流は短絡故障の負荷が接続され
た状態で、そのときの通流率に見合う事故電流が負荷に
供給される。As described above, in the electric vehicle power supply device according to the present invention, the controller is newly provided, and the controller introduces the output signal from the inverter and supplies it to the contactor.
The contactor can be kept on even when the inverter is restarting. Therefore, if a short-circuit accident occurs and the inverter restarts, the contactor will remain in the closed state, so the inverter output current will be a fault current commensurate with the current flow rate with the short-circuit fault load connected. Supplied to the load.
【0010】インバータ起動時は、通流率の低いレベル
で徐々に立上がる。従って、事故電流(ハ)もそれに見
合う傾斜で立上がるので、過電流検出値(I)に到達前
に短絡負荷に対応する配線用遮断器の遮断動作が働き、
インバータは短絡負荷とは遮断され通常の起動動作を継
続することが可能となる。When the inverter is started, it gradually rises at a low conduction ratio. Therefore, since the fault current (c) also rises with a slope corresponding to it, the breaking operation of the wiring breaker corresponding to the short-circuit load operates before the overcurrent detection value (I) is reached,
The inverter is cut off from the short-circuit load, and the normal starting operation can be continued.
【0011】[0011]
【発明の実施の形態】以下、この発明による電気車の電
力供給装置の一実施の形態を図面を参照して詳細に説明
する。なお、従来の電気車の電力供給装置と同一構成に
は同一符号を付して、詳細な説明は省略する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a power supply device for an electric vehicle according to the present invention will be described in detail below with reference to the drawings. The same components as those of the conventional electric vehicle power supply device are designated by the same reference numerals, and detailed description thereof will be omitted.
【0012】図1はこの発明による、電気車の電力供給
装置の一実施の形態を示す回路図である。即ち、一実施
の形態による電気車の電力供給装置は、直流を交流に変
換するインバータ1と、このインバータに接続された接
触器2と、この接触器2に接続された複数の配線用遮断
器41,42,43と、これら配線用遮断器41,4
2,43に夫々対応して接続された負荷51,52,5
3と、前記インバータ1に接続された交流電圧検出器即
ち交流低電圧検出器(ACLVD)3と、この交流低電
圧検出器3及び前記インバータ1に接続され、交流低電
圧検出器3からの出力信号と前記インバータ1からの出
力信号とを導入し、論理和演算により導出した制御信号
を接触器2に供給する制御器6とで構成される。FIG. 1 is a circuit diagram showing an embodiment of a power supply device for an electric vehicle according to the present invention. That is, a power supply device for an electric vehicle according to an embodiment includes an inverter 1 for converting direct current into alternating current, a contactor 2 connected to the inverter, and a plurality of wiring breakers connected to the contactor 2. 41, 42, 43 and the circuit breakers 41, 4 for these wirings
Loads 51, 52, 5 connected to 2, 43 respectively
3, an AC voltage detector connected to the inverter 1, that is, an AC low voltage detector (ACLVD) 3, an output from the AC low voltage detector 3 connected to the AC low voltage detector 3 and the inverter 1. A controller 6 which introduces a signal and an output signal from the inverter 1 and supplies a control signal derived by an OR operation to the contactor 2.
【0013】制御器6はOR回路で構成され、交流低電
圧検出器4からの出力信号とインバータ1からの出力信
号とを導入し、論理和演算を行い、いずれか一方の信号
が導入されているときには、接触器2を投入(ON)操
作するように制御信号を導出する。The controller 6 is composed of an OR circuit, which introduces the output signal from the AC low voltage detector 4 and the output signal from the inverter 1 and performs a logical OR operation to introduce either one of the signals. If so, the control signal is derived so as to turn on (ON) the contactor 2.
【0014】従って、図1に示した構成による電気車の
電力供給装置において、仮に負荷51が短絡故障し、そ
の事故による異常短絡電流が点線(ホ)で示すように、
インバータ1から、接触器2,配線用遮断器51を経て
負荷51に供給されたとすると、従来と同様、図示しな
い過電流保護回路が作動して、インバータ1を停止動作
するように制御される。そこで、インバータ1は一旦停
止動作し、接触器2も一旦OFF状態となる。その後、
インバータ1は再起動し、その出力信号がOR回路から
なる制御器6に供給されるが、規定電圧値(V)到達前
は一方の交流低電圧検出器(ACLVD)3出力は導出
されないものの、インバータ1からの起動出力信号は制
御器6に供給されるから、制御器6の出力信号により接
触器2は投入(ON)状態に切替えられる。Therefore, in the electric vehicle power supply device having the configuration shown in FIG. 1, if the load 51 is short-circuited and an abnormal short-circuit current due to the accident is indicated by a dotted line (e),
If the load is supplied from the inverter 1 to the load 51 via the contactor 2 and the circuit breaker 51 for wiring, an unillustrated overcurrent protection circuit is activated and the inverter 1 is controlled to stop as in the conventional case. Therefore, the inverter 1 is temporarily stopped and the contactor 2 is also turned off. afterwards,
The inverter 1 is restarted and its output signal is supplied to the controller 6 composed of an OR circuit, but one AC low voltage detector (ACLVD) 3 output is not derived before the specified voltage value (V) is reached, Since the activation output signal from the inverter 1 is supplied to the controller 6, the contactor 2 is switched to the ON state by the output signal of the controller 6.
【0015】従って、再起動時のインバータ1出力電流
は、短絡故障の負荷51が接続された状態で、そのとき
の通流率に見合う事故電流が負荷51,52,53に供
給される。ところで、図2に示すように、インバータ起
動時の通流率は低いレベルで徐々に立上がるから、短絡
負荷電流(ニ)もそれに見合う傾斜で立上がる。このと
き短絡負荷51に流れる電流量は、該当の配線用遮断器
41の内蔵ヒューズを溶断し回路を遮断するので、イン
バータ1出力電流が過電流検出値(I)に到達前に、イ
ンバータ1と短絡負荷51とは遮断される。Therefore, the output current of the inverter 1 at the time of restart is supplied to the loads 51, 52, 53 in the state where the load 51 having the short-circuit fault is connected and the fault current corresponding to the current flow rate at that time is supplied. By the way, as shown in FIG. 2, since the conduction ratio at the time of starting the inverter gradually rises at a low level, the short-circuit load current (d) also rises with a slope corresponding to it. At this time, the amount of current flowing through the short circuit load 51 blows off the built-in fuse of the corresponding circuit breaker 41 to cut off the circuit. Therefore, before the output current of the inverter 1 reaches the overcurrent detection value (I), It is cut off from the short-circuit load 51.
【0016】即ち、図2は、インバータ1が再起動時の
通流率(イ)、出力電圧(ロ)及び出力電流(ハ、ニ)
の特性を示す。いま、インバータ1は短絡負荷51が接
続された状態で再起動を開始し、インバータ1は短絡負
荷51接続条件のもとで通流率(イ)に見合う短絡負荷
電流(ニ)を導出する。短絡負荷電流(ニ)は、該当配
線用遮断器41の遮断動作開始のトリガとなり、時間T
3の経過を経て内蔵ヒューズを溶断する。このインバー
タ1起動後から時間T3までの経過時間は、図示しない
過電流保護回路が過電流検出値(I)を検出する(時間
T4)までの経過時間前であり、この時間T3において
配線用遮断器41はトリップする。That is, FIG. 2 shows that the duty factor (a), output voltage (b) and output current (c, d) when the inverter 1 is restarted.
The characteristics of Now, the inverter 1 starts restarting with the short-circuit load 51 connected, and the inverter 1 derives a short-circuit load current (d) commensurate with the conduction ratio (a) under the short-circuit load 51 connection condition. The short-circuit load current (d) is a trigger for starting the breaking operation of the circuit breaker 41 for the wiring, and the time T
After the progress of 3, the built-in fuse is blown. The elapsed time from the start-up of the inverter 1 to the time T3 is before the elapsed time until the overcurrent protection circuit (not shown) detects the overcurrent detection value (I) (time T4), and the disconnection for wiring is performed at the time T3. Vessel 41 trips.
【0017】従って、時間T3以降は故障負荷51は遮
断され、他の正常負荷52,53のみが接続された状態
で、インバータ1の再起動動作が推移し、出力電流
(ハ)の特性曲線に沿い定格運転に入る。Therefore, after the time T3, the faulty load 51 is cut off, and the restarting operation of the inverter 1 is changed with only the other normal loads 52 and 53 connected, and the characteristic curve of the output current (c) is shown. Enter rated operation along the line.
【0018】以上説明のように、この発明の電気車の電
力供給装置は、負荷のいずれかが短絡事故や地絡事故を
引き起こし、過電流保護回路によりインバータが再起動
した場合、故障負荷の配線用遮断器のみが作動し、他の
回路は円滑な動作が継続するので、インバータのロック
アウトやシステムダウンは回避される。As described above, in the power supply device for an electric vehicle of the present invention, when one of the loads causes a short circuit accident or a ground fault and the inverter is restarted by the overcurrent protection circuit, the wiring of the defective load is generated. Since only the circuit breaker operates and other circuits continue to operate smoothly, lockout and system down of the inverter are avoided.
【0019】[0019]
【発明の効果】この発明は、過電流保護回路が作動して
もインバータがロックアウトに陥ることがない電気車の
電力供給装置を提供するもので、実用に際し顕著な効果
が得られるものである。The present invention provides a power supply device for an electric vehicle in which the inverter does not fall into lockout even if the overcurrent protection circuit operates, and a remarkable effect can be obtained in practical use. .
【図1】この発明による電気車の電力供給装置の一実施
の形態を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of a power supply device for an electric vehicle according to the present invention.
【図2】図1に示す電気車の電力供給装置のインバータ
動作特性を示す特性曲線図である。FIG. 2 is a characteristic curve diagram showing inverter operating characteristics of the electric vehicle power supply device shown in FIG.
【図3】従来の電気車の電力供給装置を示すブロック図
である。FIG. 3 is a block diagram showing a conventional electric vehicle power supply device.
【図4】図3に示す電気車の電力供給装置が正常動作時
のインバータ動作特性を示す特性曲線図である。FIG. 4 is a characteristic curve diagram showing inverter operating characteristics when the electric vehicle power supply device shown in FIG. 3 operates normally.
【図5】図3に示す電気車の電力供給装置が負荷短絡事
故発生時のインバータ動作特性を示す特性曲線図であ
る。5 is a characteristic curve diagram showing inverter operating characteristics when the power supply device for the electric vehicle shown in FIG. 3 has a load short-circuit accident.
1 インバータ 2 負荷接触器 3 交流低電圧検出器 4,41,42,43 配線用遮断器 5,51,52,53 負荷 6 制御器 1 Inverter 2 Load contactor 3 AC low voltage detector 4, 41, 42, 43 Wiring circuit breaker 5, 51, 52, 53 Load 6 Controller
Claims (3)
のインバータに接続された接触器と、この接触器に接続
された配線用遮断器と、この配線用遮断器に接続された
負荷と、前記インバータからの出力信号を導入し前記接
触器の投入動作制御信号を前記インバータ作動中供給す
る制御器とを具備することを特徴とする電気車の電力供
給装置。1. An inverter for converting direct current into alternating current, a contactor connected to the inverter, a circuit breaker connected to the contactor, a load connected to the circuit breaker, and A controller for introducing an output signal from an inverter and supplying a closing operation control signal for the contactor during the operation of the inverter.
対応接続された負荷とが複数個前記接触器に接続構成さ
れたことを特徴とする請求項1記載の電気車の電力供給
装置。2. The power supply device for an electric vehicle according to claim 1, wherein a plurality of the circuit breakers for wiring and loads corresponding to the circuit breakers for wiring are connected to the contactors. .
記インバータからの出力信号もしくはインバータに接続
された交流電圧検出器からの規定出力信号の少なくとも
いずれか一方の出力があるときに投入動作するよう前記
接触器を制御することを特徴とする請求項2記載の電気
車の電力供給装置。3. The closing operation when the controller comprises an OR circuit and outputs at least one of an output signal from the inverter and a specified output signal from an AC voltage detector connected to the inverter. The power supply device for an electric vehicle according to claim 2, wherein the contactor is controlled so as to operate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7202546A JPH0951604A (en) | 1995-08-08 | 1995-08-08 | Power supplying device of electric car |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7202546A JPH0951604A (en) | 1995-08-08 | 1995-08-08 | Power supplying device of electric car |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0951604A true JPH0951604A (en) | 1997-02-18 |
Family
ID=16459299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7202546A Pending JPH0951604A (en) | 1995-08-08 | 1995-08-08 | Power supplying device of electric car |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0951604A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007189829A (en) * | 2006-01-13 | 2007-07-26 | Nissan Motor Co Ltd | Drive device for vehicle |
WO2014007489A1 (en) * | 2012-07-02 | 2014-01-09 | Lg Chem, Ltd. | Driver circuit for an electric vehicle and a diagnostic method for determining when a voltage driver is shorted to a ground volatge |
US8994210B2 (en) | 2012-07-02 | 2015-03-31 | Lg Chem, Ltd. | Driver circuit for an electric vehicle and a diagnostic method for determining when an electrical short circuit to a ground voltage is present between a contactor coil and a voltage driver |
US9162579B2 (en) | 2012-06-29 | 2015-10-20 | Lg Chem, Ltd. | Driver circuit for an electric vehicle and a diagnostic method for determining when a first voltage driver is shorted to a low voltage and a second voltage driver is shorted to a high voltage |
-
1995
- 1995-08-08 JP JP7202546A patent/JPH0951604A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007189829A (en) * | 2006-01-13 | 2007-07-26 | Nissan Motor Co Ltd | Drive device for vehicle |
US9162579B2 (en) | 2012-06-29 | 2015-10-20 | Lg Chem, Ltd. | Driver circuit for an electric vehicle and a diagnostic method for determining when a first voltage driver is shorted to a low voltage and a second voltage driver is shorted to a high voltage |
WO2014007489A1 (en) * | 2012-07-02 | 2014-01-09 | Lg Chem, Ltd. | Driver circuit for an electric vehicle and a diagnostic method for determining when a voltage driver is shorted to a ground volatge |
US8994210B2 (en) | 2012-07-02 | 2015-03-31 | Lg Chem, Ltd. | Driver circuit for an electric vehicle and a diagnostic method for determining when an electrical short circuit to a ground voltage is present between a contactor coil and a voltage driver |
US9024468B2 (en) | 2012-07-02 | 2015-05-05 | Lg Chem, Ltd. | Driver circuit for an electric vehicle and a diagnostic method for determining when a voltage driver is shorted to a ground voltage |
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