JPS5887491U - Control device for pulse width modulation type inverter - Google Patents

Control device for pulse width modulation type inverter

Info

Publication number
JPS5887491U
JPS5887491U JP18075681U JP18075681U JPS5887491U JP S5887491 U JPS5887491 U JP S5887491U JP 18075681 U JP18075681 U JP 18075681U JP 18075681 U JP18075681 U JP 18075681U JP S5887491 U JPS5887491 U JP S5887491U
Authority
JP
Japan
Prior art keywords
wave sample
sample value
value data
memory
width modulation
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
Application number
JP18075681U
Other languages
Japanese (ja)
Inventor
岩崎　邦治
Original Assignee
株式会社明電舎
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社明電舎 filed Critical 株式会社明電舎
Priority to JP18075681U priority Critical patent/JPS5887491U/en
Publication of JPS5887491U publication Critical patent/JPS5887491U/en
Pending legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案における正弦波と搬送波及び変調パルス
波形を示す図、第２図は本考案の一実施例を示す回路図
、第３図は第２図の動作を説明するためのタイムチャー
トである。 １・・・電圧−周波数変換器、２．　３．　４・・・カ
ウンタ、５，６．７・・・リードオンリーメモリ、８゜
１３・・・加算器、９，１７・・・反転増幅器、１０゜
１２．１４，１５，１６・・・アナログスイッチ、１７
、　１８．　１９．　２０・・・比較器。Fig. 1 is a diagram showing a sine wave, a carrier wave, and a modulated pulse waveform in the present invention, Fig. 2 is a circuit diagram showing an embodiment of the present invention, and Fig. 3 is a time chart for explaining the operation of Fig. 2. It is. 1... Voltage-frequency converter, 2. 3. 4... Counter, 5, 6.7... Read only memory, 8° 13... Adder, 9, 17... Inverting amplifier, 10° 12.14, 15, 16... Analog switch , 17
, 18. 19. 20... Comparator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] インバータ出力周波数設定値に比例した周波数信号を計
数入力とするカウンタと、このカウンタの計数値をアド
レス信号として正弦波サンプル値データと各相極性も含
めた相順データを順次出力する第１のメモリと、上記カ
ウンタの計数値をアドレス信号として搬送波サンプル値
データと同期信号を出力する第２のメモリと、上記正弦
波サンプル値データと搬送波サンプル値データとの比較
により各相パルス幅変調パルス信号を得る回路と、上記
インバータ出力周波数設定値が設定値よりも低い設定に
あるとき上記第２のメモリの搬送波サンプル値データエ
リアを２倍周波数エリアに切換える比較器とを備えたこ
とを特徴とするパルス幅変調方式インバータの制御袋−
０A counter whose counting input is a frequency signal proportional to the inverter output frequency setting value, and a first memory which sequentially outputs sine wave sample value data and phase sequence data including each phase polarity using the count value of this counter as an address signal. and a second memory that outputs carrier wave sample value data and a synchronization signal using the count value of the counter as an address signal, and a pulse width modulated pulse signal for each phase by comparing the sine wave sample value data and carrier wave sample value data. and a comparator for switching the carrier wave sample value data area of the second memory to a double frequency area when the inverter output frequency setting value is lower than the setting value. Control bag for width modulation type inverter
0
JP18075681U 1981-12-04 1981-12-04 Control device for pulse width modulation type inverter Pending JPS5887491U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18075681U JPS5887491U (en) 1981-12-04 1981-12-04 Control device for pulse width modulation type inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18075681U JPS5887491U (en) 1981-12-04 1981-12-04 Control device for pulse width modulation type inverter

Publications (1)

Publication Number Publication Date
JPS5887491U true JPS5887491U (en) 1983-06-14

Family

ID=29977628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18075681U Pending JPS5887491U (en) 1981-12-04 1981-12-04 Control device for pulse width modulation type inverter

Country Status (1)

Country Link
JP (1) JPS5887491U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5631374A (en) * 1979-08-20 1981-03-30 Hitachi Ltd Controller for pulse width modulation inverter
JPS5698371A (en) * 1979-12-29 1981-08-07 Fuji Electric Co Ltd Polyphase ac inverter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5631374A (en) * 1979-08-20 1981-03-30 Hitachi Ltd Controller for pulse width modulation inverter
JPS5698371A (en) * 1979-12-29 1981-08-07 Fuji Electric Co Ltd Polyphase ac inverter

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