JPH02223301A - Vehicle power converter - Google Patents
Vehicle power converterInfo
- Publication number
- JPH02223301A JPH02223301A JP1041684A JP4168489A JPH02223301A JP H02223301 A JPH02223301 A JP H02223301A JP 1041684 A JP1041684 A JP 1041684A JP 4168489 A JP4168489 A JP 4168489A JP H02223301 A JPH02223301 A JP H02223301A
- Authority
- JP
- Japan
- Prior art keywords
- parallel
- reactor
- filter
- voltage
- resonance
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000013016 damping Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は車両用の電力変換装置に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a power conversion device for a vehicle.
（従来の技術）
車両においては、各負荷たとえば各種制御装置、空調装
置や照明装置等の電源を集電器（以下、パンタグラフと
言う、）に接続された電力変換装置により得ている。こ
の電力変換装置は高圧の架線電圧を各装置に適した低電
圧に変換し各装置に電力を供給するものであり、たとえ
ば、インバータ装置が用いられる。(Prior Art) In a vehicle, power for various loads such as various control devices, air conditioners, lighting devices, etc. is obtained by a power conversion device connected to a current collector (hereinafter referred to as a pantograph). This power conversion device converts high overhead line voltage into a low voltage suitable for each device and supplies power to each device, and for example, an inverter device is used.
第４図はこのインバータ装置の構成図である。FIG. 4 is a configuration diagram of this inverter device.
インバータ回路５はパンタグラフ１に制限抵抗器２及び
直流フィルタリアクトル３を介して接続する。また直流
フィルタコンデンサ４はインバータ回路５の直流入力端
に並列接続する。そしてインバータ回路の３相交流出力
に空調装置等の負荷７を接続する。但し実際には変電所
の内部インピーダンス及び架線のインピーダンスの直流
フィルタリアクトルの内部抵抗等も存在するが、これら
は制限抵抗２と直流フィルタリアクトル３に合成して考
えることとする。An inverter circuit 5 is connected to the pantograph 1 via a limiting resistor 2 and a DC filter reactor 3. Further, the DC filter capacitor 4 is connected in parallel to the DC input terminal of the inverter circuit 5. Then, a load 7 such as an air conditioner is connected to the three-phase AC output of the inverter circuit. However, in reality, there are internal impedances of the substation, internal resistances of the DC filter reactor, etc. of the overhead line impedance, but these will be considered in combination with the limiting resistor 2 and the DC filter reactor 3.
（発明が解決しようとする課題）
第２図は第４図の構成図の直流フィルタの周波数−ゲイ
ン特性を示している。つまりフィルタはローパス形であ
るが、フィルタの共振周波数の付近が増幅域になってい
る。(Problem to be Solved by the Invention) FIG. 2 shows the frequency-gain characteristics of the DC filter shown in the configuration diagram of FIG. 4. In other words, the filter is a low-pass type, but the amplification range is around the filter's resonant frequency.
インバータ回路５はこのような直流フィルタと空調装置
７の間で動いているが、負荷７の変動（空調装置の起動
時等）や架線電圧の急変があると、直流フィルタのりア
クドル３とコンデンサ４との電圧分担に変動が生じる６
そして、この変動した直流フィルタコンデンサ電圧から
インバータ回路５は一定の変換比で３相交流出力電圧を
発生させるので、この交流電圧もその包絡線に変動を生
じる。さらに出力電圧が変動するため負荷電流が変動す
る。そしてこの負荷電流の変動により再び直流フィルタ
コンデンサ電圧が変動するというループができ共振現象
が発生することがある。The inverter circuit 5 operates between such a DC filter and the air conditioner 7, but if there is a change in the load 7 (such as when starting the air conditioner) or a sudden change in the overhead line voltage, the DC filter, the accelerator 3, and the capacitor 4 may Fluctuations occur in the voltage sharing between
Then, since the inverter circuit 5 generates a three-phase AC output voltage at a constant conversion ratio from this fluctuating DC filter capacitor voltage, the envelope of this AC voltage also fluctuates. Furthermore, since the output voltage fluctuates, the load current fluctuates. Then, due to this variation in the load current, a loop is formed in which the DC filter capacitor voltage again varies, and a resonance phenomenon may occur.
このような入力電圧の周期的な変動をインバータ回路５
の位相制御回路が補正し切れないと出力電圧に周期的な
変動を生じ、同じ３相交流出力の負荷である蛍光灯にフ
リッカが発生して旅客サービス上問題となることがある
。The inverter circuit 5 handles such periodic fluctuations in the input voltage.
If the phase control circuit cannot fully compensate, periodic fluctuations will occur in the output voltage, and flicker may occur in fluorescent lamps, which are also a load with three-phase AC output, which may cause problems in passenger service.
本発明の目的は、負荷や架線電圧の急変時に共振現象を
発生させないような直流フィルタをもった電力変換装置
を提供するものである。SUMMARY OF THE INVENTION An object of the present invention is to provide a power converter equipped with a DC filter that does not cause a resonance phenomenon when the load or overhead line voltage changes suddenly.
（課題を解決するための手段） 直流フィルタリアクトルと並列に抵抗器を追設する。 (Means for solving problems) Add a resistor in parallel with the DC filter reactor.
（作用）
入力電流の直流成分はりアクドルを流れるが共振成分電
流は並列抵抗へ選択的に分流することにより、直流フィ
ルタ全体をして共振電流に対するゲインを下げることが
できる。(Function) While the direct current component of the input current flows through the handle, the resonance component current is selectively shunted to the parallel resistor, thereby making it possible to lower the gain of the entire direct current filter with respect to the resonance current.
（実施例）
本発明に基づく一実施例を図面を用いて説明する。第１
図は本発明によるインバータ装置の構成を示す。(Example) An example based on the present invention will be described using the drawings. 1st
The figure shows the configuration of an inverter device according to the present invention.
架線電圧は、パンタグラフ１から制限抵抗２と直流フィ
ルタリアクトル３を介してインバータ回路５へ供給され
る。また直流フィルタコンデンサ４はインバータ回路５
の直流入力端に並列接続する。そしてインバータ回路５
の３相交流出力には空調装置、照明装置等の負荷７が並
列に接続される。そして抵抗６を直流フィルタリアクト
ル３に並列接続する。The overhead wire voltage is supplied from the pantograph 1 to the inverter circuit 5 via the limiting resistor 2 and the DC filter reactor 3. Also, the DC filter capacitor 4 is connected to the inverter circuit 5.
Connect in parallel to the DC input terminal of the and inverter circuit 5
A load 7 such as an air conditioner or a lighting device is connected in parallel to the three-phase AC output. Then, a resistor 6 is connected in parallel to the DC filter reactor 3.
以下、その作用を説明する。The effect will be explained below.
共振現象の発生には入力側直流フィルタの抵抗成分がリ
アクールの内部抵抗および制限抵抗のみで非常に小さく
、ダンピングが少ないため共振周波数の付近で第２図に
示すようなシャープな共振特性を示すことが大きな要因
となっている。For the resonance phenomenon to occur, the resistance component of the input DC filter is very small, consisting only of the internal resistance of the rear coolant and the limiting resistance, and there is little damping, so it exhibits sharp resonance characteristics near the resonance frequency as shown in Figure 2. is a major factor.
本提案の回路のようにリアクトルに並列抵抗を接続する
と共振とは関係ない定常入力電流に対しては大部分がり
アクドルを通過し、共振電流の成分に対しては、リアク
トルの両端にＬ ｄ ｘで表わさｄす
れる電圧が発生して、これによる電流が並列抵抗を流れ
ダンピングに寄与する。このためフィルタのゲインの周
波数特性は第３図に示すようになり、従来回路と比較す
ると共振周波数付近でのゲインが大幅に下り、従来の回
路では交流出力のハンチングが発生していた場合でも安
定な出力で供給することか可能である。When a parallel resistor is connected to the reactor as in the proposed circuit, most of the steady input current unrelated to resonance will pass through the reactor, and the resonant current component will have L d x across the reactor. A voltage expressed by d is generated, and the resulting current flows through the parallel resistance and contributes to damping. For this reason, the frequency characteristics of the filter's gain are as shown in Figure 3. Compared to the conventional circuit, the gain near the resonance frequency is significantly lower, and the conventional circuit is stable even when hunting occurs in the AC output. It is possible to supply it with a certain output.
前述の共振現象を防ぐ方法としては、
■ インバータの容量を大きくして負荷変動による影響
を相対的に軽くする。Methods to prevent the above-mentioned resonance phenomenon include: ■ Increase the capacity of the inverter to relatively reduce the effects of load fluctuations.
■ 直流フィルタコンデンサの容量を大きくする。■ Increase the capacity of the DC filter capacitor.
■ 制限抵抗の抵抗値を大きくする。■ Increase the resistance value of the limiting resistor.
等が考えられるが、ａ）、■はハードウェアが大きくな
ってしまい、車両搭載用としては適さないものになり、
■はインバータ装置としての効率が下がるため、やはり
不適である。etc., but a) and ■ would result in larger hardware, making it unsuitable for mounting on a vehicle.
(2) is still unsuitable because the efficiency as an inverter device decreases.
これに対して本発明の直流フィルタ改良案である第１図
の回路は、正常時には並列抵抗にはほとんど電流は流れ
ず急変時のみ電流が流れる回路でありハードウェアも小
形軽量なものでハンチング防止に十分な効果がある。On the other hand, in the circuit shown in Figure 1, which is an improved DC filter of the present invention, almost no current flows through the parallel resistor during normal operation, and current only flows during sudden changes, and the hardware is small and lightweight to prevent hunting. has sufficient effect.
上述の実施例においては、電力変換装置としてインバー
タ装置を用いて説明したが、インバータ装置の代りに直
流−直流（ＤＣ−ＤＣ）コンバータ装置を用いても上述
の作用・効果を得ることができる。In the above-described embodiment, an inverter device is used as the power conversion device, but the above-mentioned functions and effects can also be obtained by using a direct current-direct current (DC-DC) converter device instead of the inverter device.
本発明によれば、直流リアクトルと並列に共振現象発生
時の周波数成分を選択的に分流する並列抵抗を接続する
ことにより、最小限のハードウェア追加で負荷や架線電
圧急変時の電力変換装置の共振現象の発生を防ぐことが
できる。According to the present invention, by connecting a parallel resistor that selectively shunts the frequency component when a resonance phenomenon occurs in parallel with the DC reactor, the power converter can be easily operated when the load or overhead line voltage suddenly changes with minimal addition of hardware. It is possible to prevent resonance phenomena from occurring.
第１図は本発明に基づく一実施例のインバータ装置の構
成図、第２図は従来装置の周波数−ゲイン特性図、第３
図は本発明に基づく一実施例の周波数−ゲイン特性図、
第４図は従来装置の構成図を示す。
１・・・パンタグラフ。
２・・・制限抵抗器。
３・・・直流フィルタリアクトル、
４・・・直流フィルタコンデンサ、
５・・・インバータ回路、
６・・・抵抗、
７・・・負荷（空調、照明装置等）。
第
図
第
図FIG. 1 is a configuration diagram of an inverter device according to an embodiment of the present invention, FIG. 2 is a frequency-gain characteristic diagram of a conventional device, and FIG.
The figure is a frequency-gain characteristic diagram of an embodiment based on the present invention.
FIG. 4 shows a configuration diagram of a conventional device. 1... Pantograph. 2...Limiting resistor. 3... DC filter reactor, 4... DC filter capacitor, 5... Inverter circuit, 6... Resistor, 7... Load (air conditioner, lighting device, etc.). Figure Figure
Claims (1)
ンプレッサ駆動用モータ電流の変動をトリガとして、入
力の直流フィルタコンデンサ電圧が変動し、それを元に
変換した出力である３相交流電圧が変動し、その結果さ
らに負荷電流が変動するというループができることによ
る共振現象が発生しないように、直流フィルタリアクト
ルと並列に抵抗を接続し、ＬＣフィルタ回路のダンピン
グを強化し、入力の直流フィルタコンデンサ電圧の変動
を抑えるようにした直流フィルタを持った車両用電力変
換装置。In a power conversion device for a vehicle, fluctuations in the motor current for driving the compressor of the load cooler are used as a trigger to cause the input DC filter capacitor voltage to fluctuate, and based on this, the converted output three-phase AC voltage fluctuates. As a result, in order to prevent a resonance phenomenon from occurring due to the formation of a loop in which the load current fluctuates, a resistor is connected in parallel with the DC filter reactor to strengthen the damping of the LC filter circuit and to prevent fluctuations in the input DC filter capacitor voltage. A vehicle power converter equipped with a DC filter designed to suppress
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041684A JPH02223301A (en) | 1989-02-23 | 1989-02-23 | Vehicle power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041684A JPH02223301A (en) | 1989-02-23 | 1989-02-23 | Vehicle power converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02223301A true JPH02223301A (en) | 1990-09-05 |
Family
ID=12615253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1041684A Pending JPH02223301A (en) | 1989-02-23 | 1989-02-23 | Vehicle power converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02223301A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012207697A1 (en) | 2011-05-16 | 2013-02-07 | Denso Corporation | Electric vehicle system |
| US9698709B2 (en) | 2012-07-03 | 2017-07-04 | Denso Corporation | Motor driving device |
-
1989
- 1989-02-23 JP JP1041684A patent/JPH02223301A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012207697A1 (en) | 2011-05-16 | 2013-02-07 | Denso Corporation | Electric vehicle system |
| US9126485B2 (en) | 2011-05-16 | 2015-09-08 | Denso Corporation | Vehicular electric system |
| US9698709B2 (en) | 2012-07-03 | 2017-07-04 | Denso Corporation | Motor driving device |
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