JPS645360A - Power-controlling pwm signal generator - Google Patents

Power-controlling pwm signal generator

Info

Publication number
JPS645360A
JPS645360A JP62158433A JP15843387A JPS645360A JP S645360 A JPS645360 A JP S645360A JP 62158433 A JP62158433 A JP 62158433A JP 15843387 A JP15843387 A JP 15843387A JP S645360 A JPS645360 A JP S645360A
Authority
JP
Japan
Prior art keywords
pwm
comparators
vicinity
triangular wave
peak values
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
JP62158433A
Other languages
Japanese (ja)
Inventor
Kazuto Nakamura
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP62158433A priority Critical patent/JPS645360A/en
Publication of JPS645360A publication Critical patent/JPS645360A/en
Pending legal-status Critical Current

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  • Inverter Devices (AREA)

Abstract

PURPOSE:To prevent the breakdown of element by providing first and second comparators at respective positive and negative symmetric levels in tie vicinity of the upper and lower peak points out of triangular wave signals and by forbidding an ignition signal in the vicinity of said peak values. CONSTITUTION:A PWM signal generator generates a PWM control signal from ROM 12; and is composed of counter 11, D/A converter 14, interpolation circuit 21, PWM modulator 22, triangular wave generator 23, comparators 24-25, rise/fall detector 32, forced set/reset circuit 37, flip-flop 40 and others. Then, a reference voltage is given to comparators 24-25 so that minute PWM modulation signals are generated when control signals a little lower and higher than the peak values of triangular wave signals and respectively having the same absolute value exceed said level. Thus, because an ignition signal is forbidden in the vicinity of the peak values of said triangular waves, the phase lag of a pulse does not occur to enable a PWM control with high accuracy.
JP62158433A 1987-06-24 1987-06-24 Power-controlling pwm signal generator Pending JPS645360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62158433A JPS645360A (en) 1987-06-24 1987-06-24 Power-controlling pwm signal generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62158433A JPS645360A (en) 1987-06-24 1987-06-24 Power-controlling pwm signal generator

Publications (1)

Publication Number Publication Date
JPS645360A true JPS645360A (en) 1989-01-10

Family

ID=15671655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62158433A Pending JPS645360A (en) 1987-06-24 1987-06-24 Power-controlling pwm signal generator

Country Status (1)

Country Link
JP (1) JPS645360A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06203982A (en) * 1992-12-26 1994-07-22 U R D:Kk Fluorescent lamp lighting system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06203982A (en) * 1992-12-26 1994-07-22 U R D:Kk Fluorescent lamp lighting system

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