JPH0214297U - - Google Patents
Info
- Publication number
- JPH0214297U JPH0214297U JP9220488U JP9220488U JPH0214297U JP H0214297 U JPH0214297 U JP H0214297U JP 9220488 U JP9220488 U JP 9220488U JP 9220488 U JP9220488 U JP 9220488U JP H0214297 U JPH0214297 U JP H0214297U
- Authority
- JP
- Japan
- Prior art keywords
- reference voltage
- voltage waveform
- output
- arm
- phase
- 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
- 238000010586 diagram Methods 0.000 description 6
Description
第１図はこの考案の一実施例のインバータ構成
図、第２図、第３図はこの考案の一実施例を説明
するもので第２図は波形図、第３図はブロツク図
、第４図は従来のＰＷＭインバータの構成図、第
５図、第６図は従来のＰＷＭインバータの動作説
明図である。
図において、１０は直流電源、２０は逆変換器
、３０は負荷電動機、４０は基準電圧発生器、５
０はキヤリア発生器、６０はＰＷＭ回路、７０は
駆動回路である。図中、同一符号は同一、又は相
当部分を示す。
Fig. 1 is an inverter configuration diagram of an embodiment of this invention, Figs. 2 and 3 are explanatory diagrams of an embodiment of this invention, Fig. 2 is a waveform diagram, Fig. 3 is a block diagram, and Fig. 4 is an illustration of an embodiment of this invention. The figure is a block diagram of a conventional PWM inverter, and FIGS. 5 and 6 are diagrams explaining the operation of the conventional PWM inverter. In the figure, 10 is a DC power supply, 20 is an inverter, 30 is a load motor, 40 is a reference voltage generator, and 5
0 is a carrier generator, 60 is a PWM circuit, and 70 is a drive circuit. In the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
圧波形と、例えば三角波などのキヤリア波形と比
較して得られる信号により駆動され、正弦波状の
可変電圧、可変周波数の３相交流を得る３相ブリ
ツジインバータ部を有するパルス幅変調形インバ
ータ装置において、インバータ出力負荷状態を検
出する負荷検出器と、該負荷検出器の出力を受け
て該負荷が軽なるときは、前記基準電圧波形は、
各相所定の出力周波数、出力電圧を得べく、３相
ブリツジの各アームはキヤリア周期ごとにスイツ
チングをするように定められた基準電圧波形（３
アーム制御）を又、該負荷が重なるときは、前記
基準電圧波形は、３相ブリツジの各アームのうち
１アームのオン、オフ状態は固定にしておき、残
りの２アームのみをスイツチング制御するように
定められた基準電圧波形（２アーム制御）を選択
する基準電圧発生器を具備することを特徴とする
、パルス幅変調形インバータ装置。 A three-phase bridge that is driven by a signal obtained by comparing a reference voltage waveform, which serves as a reference for the output frequency and output voltage waveform, with a carrier waveform such as a triangular wave, and obtains a three-phase alternating current with a sinusoidal variable voltage and variable frequency. In a pulse width modulation type inverter device having an inverter section, a load detector detects the inverter output load state, and when the load becomes lighter in response to the output of the load detector, the reference voltage waveform is
In order to obtain a predetermined output frequency and output voltage for each phase, each arm of the three-phase bridge uses a reference voltage waveform (three
Also, when the loads overlap (arm control), the reference voltage waveform is such that the on/off state of one arm is fixed among the arms of the three-phase bridge, and only the remaining two arms are controlled by switching. 1. A pulse width modulation type inverter device, comprising a reference voltage generator that selects a reference voltage waveform (two-arm control) defined in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9220488U JPH0214297U (en) | 1988-07-12 | 1988-07-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9220488U JPH0214297U (en) | 1988-07-12 | 1988-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0214297U true JPH0214297U (en) | 1990-01-29 |
Family
ID=31316658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9220488U Pending JPH0214297U (en) | 1988-07-12 | 1988-07-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0214297U (en) |
-
1988
- 1988-07-12 JP JP9220488U patent/JPH0214297U/ja active Pending
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