APPARATUS FOR INPUTTING DUAL PULSE WIDTH MODULATION SIGNAL AND METHOD THEREFOR

摘要

PURPOSE: In circuit which the double PWM signal input device and method thereof are similar the PWM signal of the main part/pre-control device without the separate control circuit, the electronic circuit is saved by transferring to the IGBT driver. CONSTITUTION: A PWM signal of the light signal form having the certain cycle of the magnetic levitation controller which the light signal reception part(110) is changed into the signal it electrical. The double signal input buffer part(120) outputs two PWM signals transformed to the electric signal through the light signal reception part to the unitized PWM signal. By using the unitized PWM signal as described above received through the IGBT driver the chopper part(130) runs IGBT.