JPH06133561A - Inverter - Google Patents
InverterInfo
- Publication number
- JPH06133561A JPH06133561A JP4275718A JP27571892A JPH06133561A JP H06133561 A JPH06133561 A JP H06133561A JP 4275718 A JP4275718 A JP 4275718A JP 27571892 A JP27571892 A JP 27571892A JP H06133561 A JPH06133561 A JP H06133561A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- side current
- detecting
- current
- increase
- 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
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- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インバータ装置に関
し、特に部品のばらつきがある場合にも高精度な制御を
行なうためのインバータ装置に関わる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device, and more particularly to an inverter device for performing highly accurate control even when there are variations in parts.
【０００２】[0002]
【従来の技術】従来のインバータ装置は、直流電源１０
２により供給されたインバータ１０１の直流側電流の増
加検出のための基準、過電流の通流検出のための基準の
調整をインバータ装置毎に行ない、直流側電流検出器１
０５の出力を比較器ＣＯＭ１，ＣＯＭ２により基準電圧
と比較することで直流側電流の増加検出、過電流の通流
検出を行なっていた。2. Description of the Related Art A conventional inverter device includes a DC power source 10
The reference for detecting the increase of the DC side current of the inverter 101 supplied by 2 and the reference for detecting the overcurrent flow are adjusted for each inverter device, and the DC side current detector 1
The output of No. 05 is compared with the reference voltage by the comparators COM1 and COM2 to detect the increase in the DC side current and the overcurrent detection.
【０００３】図１は前記直流側電流の増加検出、過電流
の通流検出のためのインバータ装置構成図である。図１
においてインバータ１０１の調整時には、インバータ１
０１の直流側を流れる電流として定電流を流し、直流側
電流検出器１０５の出力電圧をＣＲ回路により積分し、
比較器ＣＯＭ１による基準電圧との比較で直流電流増加
の検出信号を出力する。過電流の通流検出には、直流側
電流検出器１０５の出力を比較器ＣＯＭ２により基準電
圧と比較することで過電流の通流検出信号を出力し、こ
の信号をフリップフロップＦＦ１により保持してインバ
ータ１０１のドライブ回路１０６のスイッチング信号を
停止させ、インバータ１０１の保護をするものである。
なお、本発明に関する公知例としては、例えば特開平３
−４０５９９を挙げることができる。FIG. 1 is a block diagram of an inverter device for detecting the increase in the DC side current and detecting the overcurrent flow. Figure 1
When adjusting the inverter 101 in the
A constant current is made to flow as the current flowing on the DC side of 01, and the output voltage of the DC side current detector 105 is integrated by the CR circuit,
A comparison signal with the reference voltage by the comparator COM1 outputs a detection signal of an increase in direct current. To detect the overcurrent flow, the comparator COM2 compares the output of the DC side current detector 105 with a reference voltage to output an overcurrent flow detection signal, and the flip-flop FF1 holds this signal. The switching signal of the drive circuit 106 of the inverter 101 is stopped to protect the inverter 101.
A known example of the present invention is, for example, Japanese Patent Laid-Open No.
-40599 can be mentioned.
【０００４】[0004]
【発明が解決しようとする課題】上記従来のインバータ
装置では直流側電流検出器１０５、直流側電流の増加検
出、過電流の通流検出の基準電圧用抵抗Ｒ１，Ｒ２、比
較器ＣＯＭ１，ＣＯＭ２のばらつきにより、直流側電流
検出電圧及び比較のための基準電圧が変化し、所望の値
と異なった値で直流側電流の増加検出信号、過電流の通
流検出信号を出力してしまうことがある。そのため、従
来の技術では直流側電流の増加検出の基準電圧、過電流
の通流検出の基準電圧の調整を可変抵抗ＶＲ１，ＶＲ２
により行なっていた。しかしながら、この方法において
は調整作業ミスや、調整後の振動などによる可変抵抗Ｖ
Ｒ１，ＶＲ２の抵抗値の狂いが生じる恐れがあり、制御
精度を低下させる要因となっている。In the above conventional inverter device, the DC side current detector 105, the reference voltage resistors R1 and R2 for detecting the increase in the DC side current and the overcurrent flow detection, and the comparators COM1 and COM2 are used. Due to variations, the DC side current detection voltage and the reference voltage for comparison may change, and the DC side current increase detection signal and the overcurrent flow detection signal may be output at a value different from the desired value. . Therefore, in the conventional technique, adjustment of the reference voltage for detecting the increase in the DC side current and the reference voltage for detecting the overcurrent flow is performed by adjusting the variable resistors VR1 and VR2.
It was done by. However, in this method, the variable resistance V due to an error in adjustment work or vibration after adjustment is used.
There is a possibility that the resistance values of R1 and VR2 may be out of order, which is a factor that reduces the control accuracy.
【０００５】本発明の目的は、インバータ調整時に前記
のような要因によるばらつきを補正することにより吸収
し、高精度な直流側電流増加の検出と、過電流の通流検
出を行ない、制御精度の良いインバータ装置を提供する
ことにある。An object of the present invention is to compensate for variations caused by the above factors during inverter adjustment, absorb the variations, and perform high-precision DC-side current increase detection and overcurrent flow detection, thereby improving control accuracy. It is to provide a good inverter device.
【０００６】[0006]
【課題を解決するための手段】上記目的はインバータ調
整時の直流側電流検出器１０５の出力をマイクロコンピ
ュータ１０７に取り込み、直流側電流増加検出の基準電
圧値、過電流の通流検出の基準電圧値の補正演算をそれ
ぞれ行ない、その補正された基準電圧値を不揮発性記憶
素子１０８に記憶させ、この基準電圧値により、通常時
は直流側電流の増加検出と過電流の通流検出を行なうこ
とにより達成される。The above-mentioned object is to take in the output of the DC side current detector 105 at the time of adjusting the inverter into the microcomputer 107, and to set the reference voltage value for the DC side current increase detection and the reference voltage for the overcurrent flow detection. The correction value is calculated respectively, and the corrected reference voltage value is stored in the non-volatile memory element 108, and the increase in the DC side current and the overcurrent flow detection are normally performed by the reference voltage value. Achieved by
【０００７】[0007]
【作用】インバータ調整時の直流側電流検出器１０５の
出力電圧をマイクロコンピュータ１０７に取り込むよう
にし、あらかじめマイクロコンピュータ１０７の内部に
記憶させておいた理論上の出力電圧値と比較することに
より直流側電流の増加検出の基準電圧値、過電流の通流
検出の基準電圧値の補正演算をそれぞれ行ない、その補
正された基準電圧値を不揮発性記憶素子１０８に記憶さ
せる。これはインバータの調整時にのみ行なわれるの
で、通常時には補正された直流側電流増加検出の基準電
圧値、過電流の通流検出の基準電圧値により検出信号が
出力されるので、インバータ装置毎の検出信号出力のば
らつきが低減され、制御精度の向上が可能となる。The output voltage of the DC side current detector 105 at the time of adjusting the inverter is taken into the microcomputer 107, and compared with the theoretical output voltage value stored in the microcomputer 107 in advance. The reference voltage value for current increase detection and the reference voltage value for overcurrent detection are respectively corrected, and the corrected reference voltage value is stored in the nonvolatile memory element 108. Since this is performed only when the inverter is adjusted, the detection signal is output in the normal state by the corrected reference voltage value of the DC side current increase detection and the reference voltage value of the overcurrent conduction detection. Variation in signal output is reduced, and control accuracy can be improved.
【０００８】[0008]
【実施例】図２に本発明をインバータ装置に適用した場
合の一実施例を示す。図２において、インバータ１０１
の調整時に、インバータ１０１の直流側電流として定電
流を流し、直流側電流検出器１０５の出力電圧Ｖｏｕｔ
をＣＲ回路により積分したものをＡ／Ｄ変換器１０９に
よりＡ／Ｄ変換し、マイクロコンピュータ１０７に取り
込む。マイクロコンピュータ１０７には、あらかじめ直
流側電流検出器１０５の理論上の出力電圧値Ｖｓｔが記
憶されており、この２つのデータの誤差率ｅｒｒが直流
側電流検出器１０５のばらつきである。これは数１によ
り求められる。このデータをもとに、直流側電流検出器
１０５の理論上の電流増加の検出基準電圧値Ｖｔｈ１、
理論上の過電流の通流検出基準電圧値Ｖｔｈ２に対し、
それぞれ数２，数３により補正演算を行なう。FIG. 2 shows an embodiment in which the present invention is applied to an inverter device. In FIG. 2, the inverter 101
At the time of adjustment, a constant current is made to flow as the DC side current of the inverter 101 to output the output voltage Vout of the DC side current detector 105.
Is integrated by the CR circuit, A / D converted by the A / D converter 109, and taken into the microcomputer 107. The theoretical output voltage value Vst of the DC side current detector 105 is stored in advance in the microcomputer 107, and the error rate err between these two data is the variation of the DC side current detector 105. This is calculated by the equation 1. Based on this data, the detection reference voltage value Vth1 of the theoretical current increase of the DC side current detector 105,
With respect to the theoretical overcurrent detection reference voltage value Vth2,
The correction calculation is performed according to the equations 2 and 3, respectively.
【０００９】[0009]
【数１】 [Equation 1]
【００１０】[0010]
【数２】 [Equation 2]
【００１１】[0011]
【数３】 [Equation 3]
【００１２】この補正された直流側電流増加の検出基準
電圧値Ｖｉｎｃ、過電流の通流検出基準電圧値Ｖｐｅａ
により基準電圧用抵抗Ｒ１，Ｒ２、比較器ＣＯＭ１，Ｃ
ＯＭ２のばらつきは吸収される。つぎに直流側電流増加
の検出基準電圧値、過電流の通流検出基準電圧値をマイ
クロコンピュータ１０７の外部に設けた不揮発性記憶素
子１０８に記憶させる。以下に、その動作を簡単に説明
する。不揮発性記憶素子１０８は、その内部に保持する
データの更新が可能であり、そのデータは不揮発性記憶
素子１０８に供給される電源が遮断された場合でも保持
されている。不揮発性記憶素子１０８に記憶されたデー
タの呼出し、更新はマイクロコンピュータ１０７により
制御することができる。この直流側電流増加の検出基準
電圧値、過電流の通流検出基準電圧値の補正演算、及び
不揮発性記憶素子１０８のデータ更新プログラムは調整
時にのみ実行され、通常のインバータ駆動時には実行さ
れることはない。これはマイクロコンピュータ１０７
に、このプログラムの実行を制御するための専用ポート
を設け、このポートの状態の切り換えにより、このプロ
グラムの実行を制御する。The corrected detection reference voltage value Vinc for increasing the DC side current and the overcurrent current detection detection reference voltage value Vpea
With reference voltage resistors R1 and R2 and comparators COM1 and C
Variations in OM2 are absorbed. Next, the detection reference voltage value of the increase in the DC side current and the current detection reference voltage value of the overcurrent are stored in the nonvolatile storage element 108 provided outside the microcomputer 107. The operation will be briefly described below. The nonvolatile memory element 108 can update the data held therein, and the data is held even when the power supplied to the nonvolatile memory element 108 is cut off. The calling and updating of the data stored in the non-volatile storage element 108 can be controlled by the microcomputer 107. The correction reference voltage value of the increase in the DC side current, the correction calculation of the overcurrent current detection reference voltage value, and the data update program of the non-volatile memory element 108 are executed only during adjustment, and are executed during normal inverter drive There is no. This is the microcomputer 107
In addition, a dedicated port for controlling the execution of this program is provided, and the execution of this program is controlled by switching the state of this port.
【００１３】通常のインバータ駆動時には、インバータ
装置電源投入時などのマイクロコンピュータ１０７のリ
セットの度に、マイクロコンピュータ１０７が不揮発性
記憶素子１０８に書き込まれているデータの読み込みを
行なう。したがって、このインバータ装置は、インバー
タの調整時に不揮発性記憶素子１０８に記憶された直流
側電流増加の検出基準電圧値、過電流の通流検出基準電
圧値をもとにそれぞれ直流側電流増加の検出、過電流の
通流検出を行なうため、インバータ装置毎の検出信号出
力のばらつきが低減され、制御精度の向上したインバー
タとなる。During normal inverter driving, the microcomputer 107 reads the data written in the nonvolatile memory element 108 every time the microcomputer 107 is reset, such as when the power of the inverter device is turned on. Therefore, this inverter device detects a DC-side current increase based on the DC-side current increase detection reference voltage value and the overcurrent flow-through detection reference voltage value stored in the non-volatile storage element 108 when the inverter is adjusted. Since the overcurrent flow is detected, the variation of the detection signal output for each inverter device is reduced, and the inverter has improved control accuracy.
【００１４】[0014]
【発明の効果】本発明によれば、インバータに供給され
る直流側電流を検出する電流検出手段において、回路部
品のばらつきや調整作業ミス、調整後の振動などによる
調整の狂いを補正吸収することができるので、直流側電
流の増加を検出する直流側電流の増加検出信号と、直流
側電流の過電流の通流を検出する過電流通流検出信号を
現状の検出精度約±１０％程度から、約±２％程度まで
向上させることができ、インバータ装置の故障時の保護
がしやすくなる効果がある。According to the present invention, in the current detecting means for detecting the DC side current supplied to the inverter, it is possible to correct and absorb the deviation of the adjustment due to the variation of the circuit parts, the mistake of the adjustment work, the vibration after the adjustment and the like. Therefore, the increase detection signal of the DC side current that detects the increase of the DC side current and the overcurrent flow detection signal that detects the flow of the overcurrent of the DC side current are detected from the current detection accuracy of about ± 10%. , And can be improved to about ± 2%, and there is an effect that protection in the event of a failure of the inverter device is facilitated.
【図１】本発明の従来の技術におけるインバータ装置構
成図である。FIG. 1 is a configuration diagram of an inverter device according to a conventional technique of the present invention.
【図２】本発明の一実施例におけるインバータ装置構成
図である。FIG. 2 is a configuration diagram of an inverter device according to an embodiment of the present invention.
【図３】本発明の一実施例におけるインバータ装置調整
時の動作を示すフローチャートである。FIG. 3 is a flowchart showing an operation at the time of adjusting the inverter device in the embodiment of the present invention.
【図４】本発明の一実施例におけるインバータ装置通常
時の動作を示すフローチャートである。FIG. 4 is a flowchart showing an operation of the inverter device in a normal state according to an embodiment of the present invention.
１０１…インバータ、１０２…直流電源、１０３…電動
機、１０５…直流側電流検出器、１０６…ドライブ回
路、１０７…マイクロコンピュータ（制御装置）、１０
８…不揮発性記憶素子、１０９…Ａ／Ｄ変換器、ＣＯＭ
１，ＣＯＭ２…比較器、Ｒ１…直流側電流増加検出の基
準電圧用抵抗、Ｒ２…過電流検出の基準電圧用抵抗、Ｖ
Ｒ１，ＶＲ２…可変抵抗、ＦＦ１…フリップフロップ、
Ｖｏｕｔ…インバータ調整時の直流側電流検出器の出力
電圧、Ｖｓｔ…理論上のインバータ調整時の直流側電流
検出器の出力電圧値、ｅｒｒ…直流側電流検出器の理論
値と検出値の誤差率、Ｖｔｈ１…理論上の直流電流増加
検出の基準電圧値、Ｖｔｈ２…理論上の過電流検出の基
準電圧値、Ｖｉｎｃ…補正後の直流電流増加検出の基準
電圧値、Ｖｐｅａ…補正後の過電流検出の基準電圧値。101 ... Inverter, 102 ... DC power supply, 103 ... Electric motor, 105 ... DC side current detector, 106 ... Drive circuit, 107 ... Microcomputer (control device), 10
8 ... Nonvolatile storage element, 109 ... A / D converter, COM
1, COM2 ... Comparator, R1 ... DC side current increase detection reference voltage resistance, R2 ... Overcurrent detection reference voltage resistance, V
R1, VR2 ... Variable resistance, FF1 ... Flip-flop,
Vout ... Output voltage of DC side current detector during inverter adjustment, Vst ... Output voltage value of DC side current detector during theoretical inverter adjustment, err ... Error rate between theoretical value and detection value of DC side current detector , Vth1 ... Theoretical DC current increase detection reference voltage value, Vth2 ... Theoretical overcurrent detection reference voltage value, Vinc ... Corrected DC current increase detection reference voltage value, Vpea ... Corrected overcurrent detection Reference voltage value of.
Claims (3)
調インバータと、インバータに電流を供給する直流側電
流を検出する電流検出手段を備えたものにおいて、前記
直流側電流の増加を検出する電流増加検出手段と、前記
直流側電流の過電流の通流を検出する制限電流検出手段
と、前記電流検出手段による検出のばらつきに応じて、
前記直流側電流の増加を検出する基準と過電流の通流検
出基準を補正し、これを記憶する手段を備えたことを特
徴とするインバータ装置。1. An electric motor, a pulse width modulation inverter for driving the electric motor, and a current detecting means for detecting a DC side current for supplying a current to the inverter, wherein a current increase detecting an increase in the DC side current. Depending on the detection means, the limiting current detection means for detecting the overcurrent of the direct current, and the variation in the detection by the current detection means,
An inverter device comprising means for correcting a reference for detecting an increase in the DC side current and a reference for detecting an overcurrent flow, and storing the correction.
を検出する基準と過電流の通流検出基準を補正し、これ
を記憶する手段をインバータの調整時のみ備えたことを
特徴とするインバータ装置。2. The device according to claim 1, further comprising means for correcting the reference for detecting the increase in the DC current and the reference for detecting the overcurrent flow, and storing the correction means only when the inverter is adjusted. Inverter device.
を検出する基準と過電流の通流検出基準を補正し、これ
を記憶する手段を備え、この記憶された基準によりイン
バータの制御を行なうことを特徴とするインバータ装
置。3. The method according to claim 1, further comprising means for correcting the reference for detecting the increase in the DC side current and the reference for detecting the overcurrent flow, and storing the corrected reference, and controlling the inverter based on the stored reference. An inverter device characterized by performing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4275718A JPH06133561A (en) | 1992-10-14 | 1992-10-14 | Inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4275718A JPH06133561A (en) | 1992-10-14 | 1992-10-14 | Inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06133561A true JPH06133561A (en) | 1994-05-13 |
Family
ID=17559413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4275718A Pending JPH06133561A (en) | 1992-10-14 | 1992-10-14 | Inverter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06133561A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010246373A (en) * | 2009-04-04 | 2010-10-28 | Dyson Technology Ltd | Current controller for electric machine |
| JP2010246374A (en) * | 2009-04-04 | 2010-10-28 | Dyson Technology Ltd | Control system for electric machine |
| JP2013121204A (en) * | 2011-12-06 | 2013-06-17 | Omron Automotive Electronics Co Ltd | Motor control device |
| CN106292812A (en) * | 2015-06-02 | 2017-01-04 | 海能达通信股份有限公司 | A kind of explosion-proof communication apparatus and level control circuit thereof |
| US9742318B2 (en) | 2009-04-04 | 2017-08-22 | Dyson Technology Limited | Control of an electric machine |
-
1992
- 1992-10-14 JP JP4275718A patent/JPH06133561A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010246373A (en) * | 2009-04-04 | 2010-10-28 | Dyson Technology Ltd | Current controller for electric machine |
| JP2010246374A (en) * | 2009-04-04 | 2010-10-28 | Dyson Technology Ltd | Control system for electric machine |
| CN102460947A (en) * | 2009-04-04 | 2012-05-16 | 戴森技术有限公司 | Current controller for an electric machine |
| US8395340B2 (en) | 2009-04-04 | 2013-03-12 | Dyson Technology Limited | Control system for an electric machine |
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