JPH08308242A - Rush current preventing circuit for voltage type inverter - Google Patents
Rush current preventing circuit for voltage type inverterInfo
- Publication number
- JPH08308242A JPH08308242A JP7129572A JP12957295A JPH08308242A JP H08308242 A JPH08308242 A JP H08308242A JP 7129572 A JP7129572 A JP 7129572A JP 12957295 A JP12957295 A JP 12957295A JP H08308242 A JPH08308242 A JP H08308242A
- Authority
- JP
- Japan
- Prior art keywords
- reactor
- contactor
- smoothing capacitor
- diode
- circuit
- 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
Landscapes
- Rectifiers (AREA)
- Control Of Voltage And Current In General (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インバータ装置におけ
る順変換部の直流中間回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC intermediate circuit of a forward conversion section in an inverter device.
【０００２】[0002]
【従来の技術】従来のインバータの整流回路は図３に示
すようになっている。図において、１はＤＣリアクトル
であり、入力電流波形改善のために設けられている。２
は突入電流抑制抵抗、３はコンタクタ、４は三相交流電
圧を整流する整流回路ブリッジ、５は平滑コンデンサ、
６はコンタクタ制御手段、７は平滑コンデンサ両端の電
圧を測定する電圧検出手段、８は電圧検出手段７からの
出力信号に基づいてインバータ部９を制御するインバー
タ制御手段、１０はダイオードである。次に構成を説明
する。交流電源に接続された整流回路ブリッジ４の直流
側にＤＣリアクトルと平滑コンデンサが接続された順変
換部の直流中間回路において、コンタクタ３とＤＣリア
クトル１を直列接続した直列接続回路と、前記平滑コン
デンサへ充電電流を通す向きに取りつけたダイオード１
０と突入電流抑制抵抗２を直列接続した直列接続回路と
を互いに並列接続した並列接続回路と前記平滑コンデン
サとを前記整流回路ブリッジ４の直流出力側端子間に直
列接続して構成されている。次に動作を説明する。イン
バータ制御手段８は、電圧検出手段７により整流回路ブ
リッジ４の直流出力側の電圧Ｖ0 および平滑コンデンサ
５の端子電圧Ｖ1 を検出し、Ｖ0 、Ｖ1 両者の大きさに
基づいて平滑コンデンサ５の充電状態を確認する。Ｖ0
とＶ1 の差があらかじめ設定した基準値より大きい場
合、インバータ制御手段８は、コンタクタ制御手段６を
介してコンタクタ３を開き、整流回路ブリッジ４からの
電流をダイオード１０と突入電流抑制抵抗器２を介し
て、平滑コンデンサ５へと導くようにしている。次にＶ
0 とＶ1 の差が基準値より小さくなった場合、インバー
タ制御手段８は、コンタクタ制御手段６を介してコンタ
クタ３を閉じ、突入電流抑制抵抗器を短絡し、整流回路
ブリッジ４からの電流をＤＣリアクトル１を通し、平滑
コンデンサ５へと導くようにする。インバータ制御手段
８からはインバータ部９にある主回路スイッチング素子
のベース（ゲート）へ制御信号が出力される。2. Description of the Related Art A conventional inverter rectifier circuit is shown in FIG. In the figure, 1 is a DC reactor, which is provided to improve the input current waveform. Two
Is an inrush current suppressing resistor, 3 is a contactor, 4 is a rectifying circuit bridge for rectifying a three-phase AC voltage, 5 is a smoothing capacitor,
6 is contactor control means, 7 is voltage detection means for measuring the voltage across the smoothing capacitor, 8 is inverter control means for controlling the inverter section 9 based on the output signal from the voltage detection means 7, and 10 is a diode. Next, the configuration will be described. In the DC intermediate circuit of the forward conversion unit, in which the DC reactor and the smoothing capacitor are connected to the DC side of the rectifier circuit bridge 4 connected to the AC power supply, a series connection circuit in which the contactor 3 and the DC reactor 1 are connected in series, and the smoothing capacitor. Diode 1 installed to pass the charging current to
0 and a series connection circuit in which a rush current suppressing resistor 2 is connected in series are connected in parallel to each other, and the smoothing capacitor is connected in series between the DC output side terminals of the rectifying circuit bridge 4. Next, the operation will be described. The inverter control means 8 detects the voltage V0 on the DC output side of the rectifier circuit bridge 4 and the terminal voltage V1 of the smoothing capacitor 5 by the voltage detecting means 7, and based on the magnitudes of both V0 and V1, the charging state of the smoothing capacitor 5 is detected. To confirm. V0
If the difference between V1 and V1 is larger than a preset reference value, the inverter control means 8 opens the contactor 3 via the contactor control means 6 to connect the current from the rectifier circuit bridge 4 to the diode 10 and the inrush current suppressing resistor 2. It is led to the smoothing capacitor 5 via this. Then V
When the difference between 0 and V1 becomes smaller than the reference value, the inverter control means 8 closes the contactor 3 via the contactor control means 6, short-circuits the inrush current suppressing resistor, and directs the current from the rectifier circuit bridge 4 to DC. It passes through the reactor 1 and is guided to the smoothing capacitor 5. A control signal is output from the inverter control means 8 to the base (gate) of the main circuit switching element in the inverter unit 9.
【０００３】[0003]
【発明が解決しようとする課題】ところが、従来技術で
は平滑コンデンサ５の充電中に何らかの原因でコンタク
タ３の接点が突然に開いた場合、直流リアクトルに蓄え
られた電磁エネルギーによりコンタクタ３の接点間でア
ーク放電が発生し、コンタクタの接点寿命を損なった
り、接点が溶解してしまうという問題があった。そこ
で、本発明は平滑コンデンサ５の充電中にコンタクタ３
の接点が突然開いた場合でも接点間にアーク放電が発生
すること防止することを目的とする。However, in the prior art, when the contacts of the contactor 3 suddenly open during charging of the smoothing capacitor 5 for some reason, the electromagnetic energy stored in the DC reactor causes a contact between the contacts of the contactor 3. There have been problems that arc discharge occurs, the contact life of the contactor is impaired, and the contact melts. Therefore, in the present invention, the contactor 3 is charged while the smoothing capacitor 5 is being charged.
The purpose is to prevent arc discharge from occurring between the contacts even when the contacts are suddenly opened.
【０００４】[0004]
【課題を解決するための手段】本発明は上記問題を解決
するため、交流電源に接続された整流回路ブリッジ４の
直流側に平滑コンデンサ５が接続された順変換部の直流
中間回路であって、コンタクタ３とＤＣリアクトル１を
直列接続した直列接続回路と、前記平滑コンデンサ５へ
充電電流を通す向きに取りつけたダイオード１０と突入
電流抑制抵抗２を直列接続した直列接続回路とを互いに
並列接続した並列接続回路と、前記平滑コンデンサ５と
を前記整流回路ブリッジ４の直流出力側端子間に直列接
続した電圧形インバータの突入電流防止回路において、
前記コンタクタ３とＤＣリアクトル１間の接続点とダイ
オード１１のカソードを接続して前記平滑コンデンサの
陰極側に前記ダイオード１１のアノードを接続したもの
である。また、前記ＤＣリアクトル１が、リアクトル電
流により生じる直流磁界と逆方向に磁気バイアスを与え
る永久磁石を組み込んだＤＣリアクトルである。In order to solve the above problems, the present invention relates to a DC intermediate circuit of a forward conversion section in which a smoothing capacitor 5 is connected to the DC side of a rectifier circuit bridge 4 connected to an AC power source. , A series connection circuit in which the contactor 3 and the DC reactor 1 are connected in series, and a series connection circuit in which the diode 10 and the inrush current suppressing resistor 2 are connected in series are connected in parallel. In a rush current prevention circuit of a voltage-type inverter in which a parallel connection circuit and the smoothing capacitor 5 are connected in series between the DC output side terminals of the rectifier circuit bridge 4,
The connection point between the contactor 3 and the DC reactor 1 is connected to the cathode of the diode 11, and the anode of the diode 11 is connected to the cathode side of the smoothing capacitor. Further, the DC reactor 1 is a DC reactor incorporating a permanent magnet that applies a magnetic bias in a direction opposite to the DC magnetic field generated by the reactor current.
【０００５】[0005]
【作用】上記手段により、通電中にコンタクタ３の接点
が突然開いた場合、ＤＣリアクトル１に蓄えられた電磁
エネルギーＥ（＝０．５ＬＩ2 ジュール、Ｌ：ＤＣリア
クトルのインダクタンス、Ｉ：電流）はＤＣリアクトル
１と平滑コンデンサ５とダイオード１１を通る循環電流
となって消費されるので、コンタクタ３の接点にアーク
放電は発生しない。By the above means, when the contact of the contactor 3 is suddenly opened during energization, the electromagnetic energy E (= 0.5LI 2 Joule, L: inductance of DC reactor, I: current) stored in the DC reactor 1 is Since it is consumed as a circulating current passing through the DC reactor 1, the smoothing capacitor 5 and the diode 11, arc discharge does not occur at the contact of the contactor 3.
【０００６】[0006]
【実施例】以下、本発明の実施例を図に基づいて説明す
る。本発明の構成ブロック図を図１に示す。各部の名称
に関しては、従来の構成ブロック図を示す図３と同じ名
称について同一符号を用いているので、重複説明を省略
する。１１はダイオードである。従来の構成と異なる点
は、前記コンタクタ３とＤＣリアクトル１間の接続点に
ダイオード１１のカソード側を接続して前記平滑コンデ
ンサの負極側に前記ダイオード１１のアノード側を接続
した点である。次に動作を説明する。従来の技術と同様
にして、インバータ制御手段８は次の（ア）〜（ウ）の
どれかの公知技術に基づいて平滑コンデンサ５の充電状
態を検出し、コンタクタ３を開閉する信号を作成し、コ
ンタクタ制御手段６へ開閉信号を出力する。 （ア）平滑コンデンサ５の充電電圧を直接計測する電圧
検出手段７を用いる。 （イ）平滑コンデンサ５の充電電流を直接検出する電流
検出手段を用いる。 （ウ）電源投入後一定時間経過したことを計測する時間
計測手段を用いる。 コンタクタ３は、コンタクタ制御手段６により駆動され
る。平滑コンデンサ５の充電状態があらかじめ設定した
基準値以下であるとインバータ制御手段８が判断すると
コンタクタ３を開き突入電流がＤＣリアクトル１に全く
流れないようにする。通電中にコンタクタ３を開いた瞬
間にＤＣリアクトル１には電磁誘導の法則により、通電
時の磁束を維持しようと動作するので、平滑コンデンサ
５を充電する向きに起電力を発生する。このときＤＣリ
アクトルに蓄えられたエネルギＥ（＝０．５ＬＩ2 ）
は、ＤＣリアクトル１と平滑コンデンサ５とダイオード
１１からなる閉ループを通る循環電流となって消費され
る。なおＤＣリアクトルに小形化する技術として、ＤＣ
リアクトルに永久磁石を組み込み、コアの磁気利用率を
高めたものがある（特公昭４６−３７１２８号公報）。
このＤＣリアクトルの構成図を図２に示す。リアクトル
コイル電流により生じる直流磁界と逆方向に磁気バイア
スを与える永久磁石を組みこんでいる。本発明の実施例
におけるＤＣリアクトルはどのような構成のものでもよ
いが、特に図２に示すものを使えば、同一定格で比較す
ると従来のＤＣリアクトルよりも小形・軽量にできる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A block diagram of the configuration of the present invention is shown in FIG. With regard to the names of the respective parts, the same reference numerals are used for the same names as those in FIG. Reference numeral 11 is a diode. The difference from the conventional configuration is that the cathode side of the diode 11 is connected to the connection point between the contactor 3 and the DC reactor 1 and the anode side of the diode 11 is connected to the negative side of the smoothing capacitor. Next, the operation will be described. In the same manner as the conventional technique, the inverter control means 8 detects the charging state of the smoothing capacitor 5 based on any one of the following known techniques (a) to (c) and creates a signal for opening and closing the contactor 3. , And outputs an opening / closing signal to the contactor control means 6. (A) The voltage detecting means 7 for directly measuring the charging voltage of the smoothing capacitor 5 is used. (A) A current detecting means for directly detecting the charging current of the smoothing capacitor 5 is used. (C) A time measuring means for measuring the lapse of a fixed time after the power is turned on is used. The contactor 3 is driven by the contactor control means 6. When the inverter control means 8 determines that the charging state of the smoothing capacitor 5 is equal to or lower than the preset reference value, the contactor 3 is opened so that no rush current flows into the DC reactor 1. At the moment when the contactor 3 is opened during energization, the DC reactor 1 operates to maintain the magnetic flux during energization according to the law of electromagnetic induction, so that an electromotive force is generated in the direction in which the smoothing capacitor 5 is charged. Energy E (= 0.5LI 2 ) stored in the DC reactor at this time
Is consumed as a circulating current passing through a closed loop composed of the DC reactor 1, the smoothing capacitor 5 and the diode 11. As a technology for downsizing into a DC reactor, DC
There is a reactor in which a permanent magnet is incorporated to enhance the magnetic utilization rate of the core (Japanese Patent Publication No. 46-37128).
The block diagram of this DC reactor is shown in FIG. It incorporates a permanent magnet that gives a magnetic bias in the direction opposite to the DC magnetic field generated by the reactor coil current. The DC reactor in the embodiment of the present invention may have any configuration, but if the one shown in FIG. 2 is used in particular, it can be made smaller and lighter than the conventional DC reactor when compared at the same rating.
【０００７】[0007]
【発明の効果】以上述べたように、本発明によれば、平
滑コンデンサの充電中に主回路のコンタクタの接点が突
然開いた場合でも、コンタクタの接点間にアーク放電が
発生することを完全に防ぐことができる。したがって、
コンタクタの接点寿命を損なったり、接点が溶解してし
まうという問題を解決できる。As described above, according to the present invention, even if the contact of the contactor of the main circuit is suddenly opened during charging of the smoothing capacitor, it is possible to completely prevent the arc discharge from occurring between the contact of the contactor. Can be prevented. Therefore,
It is possible to solve the problem that the contact life of the contactor is shortened or the contact is melted.
【図１】本発明の構成ブロック図である。FIG. 1 is a configuration block diagram of the present invention.
【図２】本発明の実施例で用いる永久磁石を組み込んだ
ＤＣリアクトル。FIG. 2 is a DC reactor incorporating a permanent magnet used in an embodiment of the present invention.
【図３】従来の構成ブロック図である。FIG. 3 is a block diagram of a conventional configuration.
１ ＤＣリアクトル ２ 突入電流抑制抵抗 ３ コンタクタ ４ 整流回路ブリッジ ５ 平滑コンデンサ ６ コンタクタ制御手段 ７ 電圧検出手段 ８ インバータ制御手段 ９ インバータ部 １０、１１ ダイオード 1 DC reactor 2 Inrush current suppressing resistor 3 Contactor 4 Rectifier circuit bridge 5 Smoothing capacitor 6 Contactor control means 7 Voltage detection means 8 Inverter control means 9 Inverter section 10, 11 Diode
Claims (2)
４の直流側に平滑コンデンサ５が接続された順変換部の
直流中間回路であって、コンタクタ３とＤＣリアクトル
１を直列接続した直列接続回路と、前記平滑コンデンサ
５へ充電電流を通す向きに取りつけたダイオード１０と
突入電流抑制抵抗２を直列接続した直列接続回路とを互
いに並列接続した並列接続回路と、前記平滑コンデンサ
５とを前記整流回路ブリッジ４の直流出力側端子間に直
列接続した電圧形インバータの突入電流防止回路におい
て、 前記コンタクタ３とＤＣリアクトル１間の接続点とダイ
オード１１のカソードを接続して前記平滑コンデンサの
陰極側に前記ダイオード１１のアノードを接続したこと
を特徴とする電圧形インバータの突入電流防止回路。1. A DC intermediate circuit of a forward conversion unit in which a smoothing capacitor 5 is connected to a DC side of a rectifier circuit bridge 4 connected to an AC power source, the series connection circuit including a contactor 3 and a DC reactor 1 connected in series. And a parallel connection circuit in which a diode 10 mounted in such a direction as to pass a charging current to the smoothing capacitor 5 and a series connection circuit in which the inrush current suppressing resistor 2 is connected in series are connected in parallel, and the smoothing capacitor 5 is the rectifier circuit. In a rush current prevention circuit for a voltage source inverter connected in series between the DC output side terminals of a bridge 4, the connection point between the contactor 3 and the DC reactor 1 and the cathode of a diode 11 are connected to the cathode side of the smoothing capacitor. An inrush current prevention circuit for a voltage type inverter, characterized in that the anode of a diode 11 is connected.
流により生じる直流磁界と逆方向に磁気バイアスを与え
る永久磁石を組み込んだＤＣリアクトルである請求項１
記載の電圧形インバータの突入電流防止回路。2. The DC reactor 1 is a DC reactor incorporating a permanent magnet that applies a magnetic bias in a direction opposite to a DC magnetic field generated by a reactor current.
Inrush current prevention circuit of the voltage source inverter described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12957295A JP3536425B2 (en) | 1995-04-27 | 1995-04-27 | Inrush current prevention circuit for voltage type inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12957295A JP3536425B2 (en) | 1995-04-27 | 1995-04-27 | Inrush current prevention circuit for voltage type inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08308242A true JPH08308242A (en) | 1996-11-22 |
| JP3536425B2 JP3536425B2 (en) | 2004-06-07 |
Family
ID=15012792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12957295A Expired - Fee Related JP3536425B2 (en) | 1995-04-27 | 1995-04-27 | Inrush current prevention circuit for voltage type inverter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3536425B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007028792A (en) * | 2005-07-15 | 2007-02-01 | Yamatake Corp | Converter |
| JP2011010518A (en) * | 2009-06-29 | 2011-01-13 | Mitsubishi Electric Corp | Motor controller of turbocharger |
-
1995
- 1995-04-27 JP JP12957295A patent/JP3536425B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007028792A (en) * | 2005-07-15 | 2007-02-01 | Yamatake Corp | Converter |
| JP2011010518A (en) * | 2009-06-29 | 2011-01-13 | Mitsubishi Electric Corp | Motor controller of turbocharger |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3536425B2 (en) | 2004-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH08308242A (en) | Rush current preventing circuit for voltage type inverter | |
| EP0192258A2 (en) | Hybrid relay circuit having electromagnetic relay for switching AC power supply | |
| JPH06292363A (en) | Ac adapter | |
| US5086367A (en) | Circuit breaker | |
| JPH08251936A (en) | Inrush current preventive circuit for voltage type inverter | |
| JP2544522B2 (en) | Power regeneration device | |
| JPH0662577A (en) | Power device | |
| JP3032317B2 (en) | Control device for air conditioner | |
| JPH0212367B2 (en) | ||
| JPH0660791A (en) | Power supply for circuit breaker | |
| JP3062707B2 (en) | Load drive circuit | |
| JPH05342977A (en) | Proper voltage detection protection device for electromagnetic switch | |
| JPS62196072A (en) | Rush-current limitting circuit for inverter | |
| JP2004103308A (en) | Circuit breaker | |
| JP2931950B2 (en) | Electromagnet drive | |
| JP3368706B2 (en) | Hybrid switch | |
| SU1149362A2 (en) | Electric drive with stabilized rotational speed | |
| JP2005006419A (en) | Current suppressor | |
| JPH1014086A (en) | Circuit breaker | |
| JPH06141548A (en) | Rush current suppressing circuit | |
| JPS61161018A (en) | Displacement current compensating device of electrostatic induction thyristor | |
| SU1642538A2 (en) | Device for control of voltage of storage battery | |
| JPS60119128A (en) | Switching device | |
| JP2547186Y2 (en) | Power supply for arc machining | |
| JP3078080B2 (en) | Arc welding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20031127 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20031202 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040130 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040224 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040308 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080326 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090326 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090326 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100326 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110326 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120326 Year of fee payment: 8 |
|
| LAPS | Cancellation because of no payment of annual fees |