JP3324239B2 - Inverter device - Google Patents
Inverter deviceInfo
- Publication number
- JP3324239B2 JP3324239B2 JP30071293A JP30071293A JP3324239B2 JP 3324239 B2 JP3324239 B2 JP 3324239B2 JP 30071293 A JP30071293 A JP 30071293A JP 30071293 A JP30071293 A JP 30071293A JP 3324239 B2 JP3324239 B2 JP 3324239B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- capacitor
- inverter device
- discharge time
- value
- 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.)
- Expired - Lifetime
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Protection Of Static Devices (AREA)
- Inverter Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】この発明は、直流電圧を平滑する
コンデンサを有するインバータ装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter having a capacitor for smoothing a DC voltage.
【０００２】[0002]
【従来の技術】図３に従来の電圧形インバータ装置の回
路構成図を示し、商用電源１より電磁接触器の接点２を
介して電圧形インバータ装置３に電力が供給され、電圧
形インバータ装置３により所望の交流電源に変換して、
例えば電動機などの負荷４に給電するようにしており、
電圧形インバータ装置３は交流電圧を直流電圧に変換す
る整流器５、整流器５の出力を平滑するコンデンサ６、
直流電圧を交流電圧に変換するインバータ７、インバー
タ装置３を制御するＣＰＵ、駆動回路等からなる制御回
路８で構成されている。2. Description of the Related Art FIG. 3 shows a circuit diagram of a conventional voltage source inverter device. Power is supplied from a commercial power supply 1 to a voltage source inverter device 3 through a contact 2 of an electromagnetic contactor. To the desired AC power source,
For example, power is supplied to a load 4 such as an electric motor,
The voltage source inverter device 3 includes a rectifier 5 for converting an AC voltage to a DC voltage, a capacitor 6 for smoothing an output of the rectifier 5,
The control circuit 8 includes an inverter 7 for converting a DC voltage to an AC voltage, a CPU for controlling the inverter device 3, and a control circuit 8 including a drive circuit.
【０００３】従来の電圧形インバータ装置のコンデンサ
６は、大きな静電容量を必要とするため電解コンテンサ
を使用しているが、この電解コンデンサは磨耗する部品
であり、寿命時間が他の部品に比べて比較的に短く、磨
耗すると静電容量が減少して、インバータ装置全体の機
能を阻害する恐れがあるために、電解コンデンサが磨耗
すれば新品と交換する必要があった。[0003] The capacitor 6 of the conventional voltage source inverter device uses an electrolytic capacitor because it requires a large capacitance. However, this electrolytic capacitor is a wearable component, and its life time is longer than other components. It is relatively short, and when worn, the capacitance decreases, which may hinder the function of the entire inverter device. Therefore, if the electrolytic capacitor is worn, it must be replaced with a new one.
【０００４】[0004]
【発明が解決しようとする課題】従来の電圧形インバー
タ装置においては、上述の電解コンテンサが磨耗した時
に新品と交換するために、電圧形インバータ装置の外部
または内部に通電時間計を設置するか、あるいは使用状
態より通電時間を推定して、所定の通電時間を経過した
ことで磨耗による交換時期に至ったと判断をしていた。In the conventional voltage type inverter device, in order to replace the electrolytic capacitor with a new one when the electrolytic capacitor is worn out, an energizing time meter is installed outside or inside the voltage type inverter device. Alternatively, the power supply time is estimated from the use state, and it has been determined that the replacement time due to wear has reached when the predetermined power supply time has elapsed.
【０００５】この発明の課題は、前記電解コンテンサを
磨耗により新品と交換するために、電圧形インバータ装
置の内部に前記電解コンテンサの磨耗による静電容量の
減少を検知する機能を付加することにある。[0005] It is an object of the present invention to add a function of detecting a decrease in capacitance due to wear of the electrolytic capacitor inside the voltage type inverter device in order to replace the electrolytic capacitor with a new one due to wear. .
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、この発明では、直流電圧を平滑するコンデンサを有
するインバータ装置において、この電圧形インバータ装
置の主回路の入力電源を遮断したときに、前記コンデン
サの端子電圧を検知する検知手段と、この検知手段の出
力値により前記コンデンサの放電時間を計測する計測手
段と、この計測手段の計測値を記憶する不揮発性の記憶
手段と、この記憶手段の記憶値が予め定めた値より小さ
くなったことを表示する表示手段とを設けたものであ
り、また、前記計測手段は前記検知手段の出力値が予め
定めた複数個の異なった電圧設定値の間を通過する時間
を計測するものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, when an input power supply of a main circuit of a voltage type inverter device is cut off in an inverter device having a capacitor for smoothing a DC voltage, Detecting means for detecting a terminal voltage of the capacitor; measuring means for measuring a discharge time of the capacitor based on an output value of the detecting means; nonvolatile storing means for storing a measured value of the measuring means; Display means for displaying that the stored value of the predetermined value has become smaller than a predetermined value, and the measuring means has a plurality of different voltage setting values whose output values of the detecting means are predetermined. It measures the time it takes to pass.
【０００７】[0007]
【作用】この発明によれば、コンデンサを直流回路に有
するインバータ装置の主回路の入力電源を遮断したとき
に、前記コンデンサの電荷が放電する際の放電時間を計
測し、磨耗して前記コンデンサの静電容量が減少すると
前記放電時間が、新品（磨耗する前）の時と比べて、短
くなることによりコンデンサの寿命を判断する。According to the present invention, when the input power to the main circuit of the inverter device having a capacitor in the DC circuit is cut off, the discharge time when the electric charge of the capacitor is discharged is measured, and the capacitor is worn out. When the capacitance decreases, the discharge time becomes shorter than that when the capacitor is new (before being worn), and the life of the capacitor is determined.
【０００８】[0008]
【実施例】図１はこの発明の実施例を示す電圧形インバ
ータ装置の回路構成図であって、図３と同一機能を有す
るものには同一符号を付して説明を省略し、異なる機能
のものを中心に説明する。すなわち図１において、４０
はコンデンサ６の端子電圧を検出する電圧検出器、４１
は制御演算をするＣＰＵ、４２はコンデンサ６の放電時
間を計測するカウンタ、４３はカウンタ４２のカウント
値を記憶する不揮発性メモリ、４４はコンデンサ６の交
換を知らせる表示器、４５は従来のインバータ装置の制
御回路と同様な機能をするインバータ７の駆動回路であ
る。FIG. 1 is a circuit diagram of a voltage type inverter device according to an embodiment of the present invention. Components having the same functions as those shown in FIG. I will mainly explain things. That is, in FIG.
Is a voltage detector for detecting the terminal voltage of the capacitor 6, 41
Is a CPU that performs control calculations, 42 is a counter that measures the discharge time of the capacitor 6, 43 is a non-volatile memory that stores the count value of the counter 42, 44 is a display that indicates the replacement of the capacitor 6, 45 is a conventional inverter device Is a drive circuit of the inverter 7 having the same function as the control circuit of FIG.
【０００９】この発明の動作を、図２に示す波形図を参
照しつつ説明する。図２において、電磁接触器の接点２
がオフすると、コンデンサ６の端子電圧Ｅｄｃは供用開
始の時点ではＥｄｃ0（細線）で示す時間経過で放電
し、予め定めた電圧設定値Ｖ1とＶ2（Ｖ1＞Ｖ2）とを通
過する時間ｔ0を電圧検出器４０、ＣＰＵ４１を介して
カウンタ４２で計測し、寿命検出放電時間ｔ0として不
揮発性メモリ４３に記憶させる。The operation of the present invention will be described with reference to the waveform diagram shown in FIG. In FIG. 2, the contact 2 of the electromagnetic contactor
Is turned off, the terminal voltage Edc of the capacitor 6 is discharged at the time of the start of operation after a lapse of time indicated by Edc 0 (thin line), and passes predetermined voltage setting values V 1 and V 2 (V 1 > V 2 ). The time t 0 is measured by the counter 42 via the voltage detector 40 and the CPU 41, and is stored in the nonvolatile memory 43 as the life detection discharge time t 0 .
【００１０】供用開始以後は電磁接触器の接点２がオン
からオフする毎に、上述と同様の方法で、コンデンサ６
の端子電圧ＥｄｃがＶ1とＶ2とを通過する時間を測定
し、この測定値を、第１の設定電圧Ｖ 1 からこれより低
いレベルに設定された第２の電圧Ｖ 2 まで低下するのに
要した放電時間ｔ1として、不揮発性メモリ４３に記憶
させ、Ｅｄｃ1（太線）で示す時間経過で放電したとき
のｔ1が、前記ｔ0に予め定めた係数Ｋ（Ｋ＜１）を乗じ
た値Ｔ0（Ｔ0＝Ｋ・ｔ0）より小さくなった時に、ＣＰ
Ｕ４１はコンデンサ６が交換時期にある旨の信号を発し
て、表示器４４でコンデンサ６が交換時期にきているこ
とを表示させる。After the start of operation, each time the contact 2 of the electromagnetic contactor is turned off from on, the capacitor 6 is turned on in the same manner as described above.
Is measured when the terminal voltage Edc passes through V 1 and V 2, and this measured value is reduced from the first set voltage V 1 to a lower value.
To decrease to a second voltage V 2 is set to the level had
Multiplying the discharge time t 1 taken, stored in the nonvolatile memory 43, Edc 1 t 1 when discharged at time indicated by (thick line) is the t 0 to a predetermined coefficient K (K <1) Is smaller than the value T 0 (T 0 = K · t 0 ), CP
U41 issues a signal that capacitor 6 is about to be replaced.
Then , the display 44 indicates that the capacitor 6 is about to be replaced.
【００１１】なお、前記Ｔ0の代わりに予め定めた時間
Ｔ1と前記ｔ1とを比較してＴ1＞ｔ1となつた時に表示器
４４で、コンデンサ６が交換時期にきていることを表示
させることもできる。また、図１の回路構成で予め定め
た電圧設定値を複数個設けて、それぞれを通過する時間
と、電圧設定値の個数に対応した予め定めた時間値とを
比較した結果で表示器４４に表示させることも可能であ
る。It is to be noted that the predetermined time T 1 is compared with the time t 1 in place of the time T 0 , and that when the time T 1 > t 1 satisfies T 1 > t 1 , the time for replacement of the capacitor 6 has been reached on the display 44. Can also be displayed. Also, a plurality of predetermined voltage setting values are provided in the circuit configuration of FIG. 1, and a time obtained by passing a plurality of voltage setting values and a predetermined time value corresponding to the number of voltage setting values are compared with each other on the display 44. It can also be displayed.
【００１２】[0012]
【発明の効果】この発明によれば、直流電圧を平滑する
コンデンサを有するインバータ装置における、前記コン
デンサの磨耗時間を、使用環境、使用条件を反映した、
従来の方法に比してより正確に検知することができ、コ
ンデンサの新品と交換時期を正確に知ることができる。According to the present invention, in the inverter device having the capacitor for smoothing the DC voltage, the wear time of the capacitor reflects the use environment and the use condition.
The detection can be performed more accurately than the conventional method, and the new capacitor and the replacement time can be accurately known.
【図１】この発明の実施例を示す回路構成図FIG. 1 is a circuit diagram showing an embodiment of the present invention.
【図２】図１の動作を説明する波形図FIG. 2 is a waveform chart illustrating the operation of FIG.
【図３】従来例を示す回路構成図FIG. 3 is a circuit configuration diagram showing a conventional example.
１ 商用電源 ２ 電磁接触器 ３ 電圧形インバータ装置 ４ 負荷 ５ 整流器 ６ コンデンサ ７ インバータ ８ 制御回路 ４０ 電圧検出器 ４１ ＣＰＵ ４２ カウンタ ４３ 不揮発性メモリ ４４ 表示器 ４５ 駆動回路 DESCRIPTION OF SYMBOLS 1 Commercial power supply 2 Magnetic contactor 3 Voltage source inverter device 4 Load 5 Rectifier 6 Capacitor 7 Inverter 8 Control circuit 40 Voltage detector 41 CPU 42 Counter 43 Non-volatile memory 44 Display 45 Drive circuit
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02H 7/122 H02H 7/18 H02M 7/48 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) H02H 7/122 H02H 7/18 H02M 7/48
Claims (3)
ンバータ装置において、このインバータ装置の主回路の
入力電源を遮断したときに、前記コンデンサの端子電圧
を検知する検知手段と、この検知手段の出力値により前
記コンデンサの放電時間を計測する計測手段と、この計
測手段の計測値を記憶する不揮発性の記憶手段と、この
記憶手段の記憶値が予め定めた値より小さくなったこと
を表示する表示手段とを設けたことを特徴とするインバ
ータ装置。1. An inverter device having a capacitor for smoothing a DC voltage, a detection means for detecting a terminal voltage of the capacitor when an input power supply of a main circuit of the inverter device is cut off, and an output value of the detection means. Measuring means for measuring the discharge time of the capacitor, non-volatile storage means for storing the measured value of the measuring means, and display means for displaying that the stored value of the storage means has become smaller than a predetermined value. And an inverter device.
て、前記計測手段は前記検知手段の出力値が予め定めた
複数個の異なった電圧設定値の間を通過する時間を計測
することを特徴とするインバータ装置。2. The inverter device according to claim 1, wherein said measuring means measures a time during which an output value of said detecting means passes between a plurality of predetermined voltage setting values. Inverter device.
（５）と、この整流器の出力を平滑するコンデンサ
（６）と、このコンデンサに接続されて直流電圧を交流
電圧に変換するインバータ主回路（７）とを備えたイン
バータ装置において、前記インバータ主回路の電源遮断
時に前記コンデンサの端子電圧を検知する電圧検知手段
（４０）と、予め設定された寿命検出放電時間（ｔ0）
と前記電圧検知手段による検知電圧が予め設定した第１
の電圧（Ｖ1）からこれより低いレベルに設定された第
２の電圧（Ｖ2）まで低下するのに要した放電時間
（ｔ1）とを記憶するための不揮発性の記憶手段（４
３）と、前記放電時間（ｔ 1 ）が前記寿命検出放電時間
（ｔ 0 ）以下であった場合に前記コンデンサが交換時期
にある旨の信号を発する手段（４１）とを設けたことを
特徴とするインバータ装置。3. A rectifier (5) for converting an AC voltage to a DC voltage, a capacitor (6) for smoothing the output of the rectifier, and an inverter main circuit connected to the capacitor and converting the DC voltage to an AC voltage (5). 7), a voltage detecting means (40) for detecting a terminal voltage of the capacitor when the power supply of the inverter main circuit is cut off, and a preset life detection discharge time (t 0 ).
And a voltage detected by the voltage detecting means is set to a first preset value.
Nonvolatile storage means (4 ) for storing the discharge time (t 1 ) required to decrease from the voltage (V 1 ) to the second voltage (V 2 ) set to a lower level.
3) and the discharge time (t 1 ) is the lifetime detection discharge time
Means (41) for issuing a signal indicating that the capacitor is about to be replaced when it is equal to or less than (t 0 ) .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30071293A JP3324239B2 (en) | 1993-12-01 | 1993-12-01 | Inverter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30071293A JP3324239B2 (en) | 1993-12-01 | 1993-12-01 | Inverter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07163045A JPH07163045A (en) | 1995-06-23 |
| JP3324239B2 true JP3324239B2 (en) | 2002-09-17 |
Family
ID=17888190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30071293A Expired - Lifetime JP3324239B2 (en) | 1993-12-01 | 1993-12-01 | Inverter device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3324239B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7557523B2 (en) | 2004-10-26 | 2009-07-07 | Panasonic Electric Works Co., Ltd. | Discharge lamp lighting device, and lighting equipment and lighting system using the device |
| JP2012205391A (en) * | 2011-03-25 | 2012-10-22 | Toshiba Schneider Inverter Corp | Inverter device and method of estimating capacitance of smooth capacitor |
| CN106526334A (en) * | 2016-11-25 | 2017-03-22 | 北京科诺伟业光电科技有限公司 | Capacity detection circuit for DC bus capacitor of photovoltaic inverter |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11289752A (en) * | 1998-03-31 | 1999-10-19 | Fuji Electric Co Ltd | Device for advance noticing of capacitor end of life to power conversion device |
| JP4418259B2 (en) * | 2004-02-27 | 2010-02-17 | 株式会社日立製作所 | Electric brake device |
| CN100553086C (en) * | 2004-03-15 | 2009-10-21 | 株式会社日立医药 | Power-converting device, inversion X line high voltage device, X line fluoroscopic, x-ray ct device, MRI device |
| JP2007295655A (en) * | 2006-04-21 | 2007-11-08 | Yaskawa Electric Corp | Power converter |
| DE102006053398A1 (en) | 2006-11-10 | 2008-05-15 | Endress + Hauser Gmbh + Co. Kg | Electronic device |
| CN103713186A (en) * | 2013-12-25 | 2014-04-09 | 吉林大学 | Motor terminal voltage measuring instrument of alternating current frequency conversion motor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827871B2 (en) * | 1978-04-08 | 1983-06-11 | 日本電信電話株式会社 | Capacitor life detection device |
| JPH02266820A (en) * | 1989-04-04 | 1990-10-31 | Fuji Electric Co Ltd | Lifetime judging circuit in smoothing capacitor for power converter |
| JP3263979B2 (en) * | 1992-07-20 | 2002-03-11 | 株式会社豊田自動織機 | Degradation failure diagnosis device for capacitors |
-
1993
- 1993-12-01 JP JP30071293A patent/JP3324239B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7557523B2 (en) | 2004-10-26 | 2009-07-07 | Panasonic Electric Works Co., Ltd. | Discharge lamp lighting device, and lighting equipment and lighting system using the device |
| JP2012205391A (en) * | 2011-03-25 | 2012-10-22 | Toshiba Schneider Inverter Corp | Inverter device and method of estimating capacitance of smooth capacitor |
| CN106526334A (en) * | 2016-11-25 | 2017-03-22 | 北京科诺伟业光电科技有限公司 | Capacity detection circuit for DC bus capacitor of photovoltaic inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07163045A (en) | 1995-06-23 |
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