JPS54100653A - Driving method for single-phase-bridge constant frequency pulse-width modulating power amplifier - Google Patents

Driving method for single-phase-bridge constant frequency pulse-width modulating power amplifier

Info

Publication number
JPS54100653A
JPS54100653A JP696778A JP696778A JPS54100653A JP S54100653 A JPS54100653 A JP S54100653A JP 696778 A JP696778 A JP 696778A JP 696778 A JP696778 A JP 696778A JP S54100653 A JPS54100653 A JP S54100653A
Authority
JP
Japan
Prior art keywords
voltage
conductive
zero
unconductive
input
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
JP696778A
Other languages
Japanese (ja)
Inventor
Hisayasu Ito
Takashi Katsukawa
Tomokichi Suzuki
Shigeo Hatori
Shigeru Sakuragawa
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.)
Yaskawa Electric Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Yaskawa Electric Manufacturing Co 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 Nippon Telegraph and Telephone Corp, Yaskawa Electric Manufacturing Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP696778A priority Critical patent/JPS54100653A/en
Publication of JPS54100653A publication Critical patent/JPS54100653A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To eliminate noises and vibrations while a motor stops by reducing the capacity of a smoothing coil by making an AC component zero when an output is zero, by conducting an independent drive corresponding to the sign of an output voltage.
CONSTITUTION: Input (ei) applied is converted partially by polarity-inverting amplifier A into voltage (ei) of the reverse polarity, and (ei) and (ei') are compared by voltage comparator circuits C1 and C2 with a reference triangular wave and then inputted to transistor (Tr) driver circuits B1 to B4. Some of the comparison output is polarity-inverted by inverters I1 and I2. As for bridge-connected Trs T1 to T4, TrT1 is conductive and T2 is unconductive when input (ei) is larger than reference triangular wave (eT), and T2 is conductive and T1 is unconductive when (ei) is smaller than (eT); and T3 is conductive when (ei') is larger than (eT) and T4 is conductive and T3 is unconductive when (ei) is smaller than (eT). Therefore, output voltage (eO) becomes a pulse string of a positive voltage when input (ei) is positive, a pulse string of a negative voltage when (ei) is negative, and zero when (ei) is zero, so that the ripple of the output voltage will lessen.
COPYRIGHT: (C)1979,JPO&Japio
JP696778A 1978-01-25 1978-01-25 Driving method for single-phase-bridge constant frequency pulse-width modulating power amplifier Pending JPS54100653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP696778A JPS54100653A (en) 1978-01-25 1978-01-25 Driving method for single-phase-bridge constant frequency pulse-width modulating power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP696778A JPS54100653A (en) 1978-01-25 1978-01-25 Driving method for single-phase-bridge constant frequency pulse-width modulating power amplifier

Publications (1)

Publication Number Publication Date
JPS54100653A true JPS54100653A (en) 1979-08-08

Family

ID=11652965

Family Applications (1)

Application Number Title Priority Date Filing Date
JP696778A Pending JPS54100653A (en) 1978-01-25 1978-01-25 Driving method for single-phase-bridge constant frequency pulse-width modulating power amplifier

Country Status (1)

Country Link
JP (1) JPS54100653A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56131253A (en) * 1980-01-31 1981-10-14 Western Electric Co Signal circuit capable of connecting subscriber line of communication exchange system
JPH0511552U (en) * 1991-07-17 1993-02-12 日本電気ホームエレクトロニクス株式会社 Digital PWM conversion circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56131253A (en) * 1980-01-31 1981-10-14 Western Electric Co Signal circuit capable of connecting subscriber line of communication exchange system
JPH0511552U (en) * 1991-07-17 1993-02-12 日本電気ホームエレクトロニクス株式会社 Digital PWM conversion circuit

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