JPH0476199U - - Google Patents
Info
- Publication number
- JPH0476199U JPH0476199U JP11851190U JP11851190U JPH0476199U JP H0476199 U JPH0476199 U JP H0476199U JP 11851190 U JP11851190 U JP 11851190U JP 11851190 U JP11851190 U JP 11851190U JP H0476199 U JPH0476199 U JP H0476199U
- Authority
- JP
- Japan
- Prior art keywords
- current
- direct current
- line
- main circuit
- detector
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Control Of Ac Motors In General (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図はインバータから出力される各相の出力電流お
よび電流検出器を流れる直流電流の各波形をそれ
ぞれ示し、Ａは無負荷運転中の各電流波形を示す
グラフ、Ｂは定格負荷運転中の各電流波形を示す
グラフである。
１……整流ダイオード、２……インバータ、３
……誘導電動機、４……電流検出器、５……ピー
ク検出器、６……平滑コンデンサ、７……検出出
力端、８……主回路直流線路、Ｄ……ダイオード
、Ｃ……コンデンサ、Ｒ……抵抗器。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure shows each waveform of the output current of each phase output from the inverter and the DC current flowing through the current detector, where A is a graph showing each current waveform during no-load operation, and B is a graph showing each current during rated load operation. It is a graph showing a waveform. 1... Rectifier diode, 2... Inverter, 3
... Induction motor, 4 ... Current detector, 5 ... Peak detector, 6 ... Smoothing capacitor, 7 ... Detection output terminal, 8 ... Main circuit DC line, D ... Diode, C ... Capacitor, R...Resistor.
Claims (1)
順変換器１，６より主回路直流線路８を介して前
記直流が供給され、該直流を交流に逆変換して誘
導電動機３を駆動するパルス幅変調方式のインバ
ータ２とを備えた電動制御装置において、 前記主回路直流線路８を流れる直流電流を検出
する電流検出器４と、 該電流検出器４の検出出力Ｓのうち、前記主回
路直流線路８を正方向に流れる直流電流の検出
出力Ｓのみを取出し、そのピーク値を示す信号を
出力するピーク検出器５とを備えたことを特徴と
するインバータの出力電流検出回路。[Claims for Utility Model Registration] Forward converters 1 and 6 for forward converting alternating current into direct current, and the forward converters 1 and 6 supplying the direct current via a main circuit direct current line 8, and converting the direct current to alternating current. An electric control device including a pulse width modulation type inverter 2 that performs inverse conversion and drives an induction motor 3, comprising: a current detector 4 that detects a DC current flowing through the main circuit DC line 8; and the current detector 4. It is characterized by comprising a peak detector 5 which extracts only the detection output S of the DC current flowing in the positive direction in the main circuit DC line 8 from among the detection outputs S of and outputs a signal indicating its peak value. Inverter output current detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11851190U JPH0476199U (en) | 1990-11-14 | 1990-11-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11851190U JPH0476199U (en) | 1990-11-14 | 1990-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0476199U true JPH0476199U (en) | 1992-07-02 |
Family
ID=31866435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11851190U Pending JPH0476199U (en) | 1990-11-14 | 1990-11-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0476199U (en) |
-
1990
- 1990-11-14 JP JP11851190U patent/JPH0476199U/ja active Pending
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