JPS555065A - Pulse width modulation inverter modulating system - Google Patents

Pulse width modulation inverter modulating system

Info

Publication number
JPS555065A
JPS555065A JP7748978A JP7748978A JPS555065A JP S555065 A JPS555065 A JP S555065A JP 7748978 A JP7748978 A JP 7748978A JP 7748978 A JP7748978 A JP 7748978A JP S555065 A JPS555065 A JP S555065A
Authority
JP
Japan
Prior art keywords
modulated
wave
generates
absolute value
shaped
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
JP7748978A
Other languages
Japanese (ja)
Inventor
Nobuyoshi Muto
Yasuo Matsuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7748978A priority Critical patent/JPS555065A/en
Publication of JPS555065A publication Critical patent/JPS555065A/en
Pending legal-status Critical Current

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  • Inverter Devices (AREA)

Abstract

PURPOSE: To eliminate superimposition of DC current component with an inverter output by comparing the absolute value of carrier with the modulated wave of half cycle to thereby obtain one cycle waveform of the modulated signal.
CONSTITUTION: An oscillator 15 generates a triangular wave, and a rectangular pulse train generator 101 generates upon reception of the triangular wave a rectangular pulse train. An absolute value circuit 16 takes the absolute value of the triangular wave upon removal of the DC component from the wave. A positive side modulated wave forming circuit 17 generates the modulated wave forming U-shaped positive modulated signal. A negative side modulated wave forming circuit 19 generates the modulated wave for forming the U-shaped load. Comparators 20, 21 respectively form positive and negative side modulated signals. The U-shaped modulated signal is obtained by logic calculation of the modulated signals.
COPYRIGHT: (C)1980,JPO&Japio
JP7748978A 1978-06-28 1978-06-28 Pulse width modulation inverter modulating system Pending JPS555065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7748978A JPS555065A (en) 1978-06-28 1978-06-28 Pulse width modulation inverter modulating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7748978A JPS555065A (en) 1978-06-28 1978-06-28 Pulse width modulation inverter modulating system

Publications (1)

Publication Number Publication Date
JPS555065A true JPS555065A (en) 1980-01-14

Family

ID=13635392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7748978A Pending JPS555065A (en) 1978-06-28 1978-06-28 Pulse width modulation inverter modulating system

Country Status (1)

Country Link
JP (1) JPS555065A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61164470A (en) * 1985-01-07 1986-07-25 アライド・コーポレーシヨン Digital driving system for pulse width modulation power control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61164470A (en) * 1985-01-07 1986-07-25 アライド・コーポレーシヨン Digital driving system for pulse width modulation power control

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