Title:
PHASE CONTROL SIGNAL AND PWM CONVERTER
Document Type and Number:
Japanese Patent JP2017220438
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a phase control and a PWM converter capable of stably dimming an LED lighting fixture dimming by a Pulse Width Modulation (PWM) system with a converter that stably outputs an unstable signal of a phase control system dimmer in the PWM.SOLUTION: A phase control and a PWM converter, is constructed by an insulation step-down part; a rectification part; a noise removing part; a measurement part; a calculation part; a PWM signal output part; and a PWM power amplifier part with a purpose of removing unstable elements such as noise component or the disturbance of the waveform included in the output for converting the stable PWN signal as a signal for adjusting a light from the output of a phase control type dimmer. The measurement of a voltage is executed with an interval of 5 to 20 microseconds. A arithmetic average of a period (hereinbelow, called as a period A) of 5,000 to 20,000 times of the value is calculated. The arithmetic average of past four periods A is sequentially calculated in a time when the value which is larger than a time twice the period A (hereinbelow, called as a period B) and does not become an integer by dividing a period B. By outputting the PWM signal from the arithmetic average value, an LED controlled by the PWM can be stably lightened.SELECTED DRAWING: Figure 5
Inventors:
TANAE AKIRA
MOROHASHI HISAO
SENDA SHINYA
ITOYAMA TOSHIKAZU
MOROHASHI HISAO
SENDA SHINYA
ITOYAMA TOSHIKAZU
Application Number:
JP2016128142A
Publication Date:
December 14, 2017
Filing Date:
June 10, 2016
Export Citation:
Assignee:
ONO GIJUTSU KENKYUSHO KK
International Classes:
H05B37/02; H03K7/08; H03K17/78