bilal_sheikh
Junior Member level 1
hello all, recently i am working on a project that is variable frequency drive. i have to control the speed of a single phase AC induction motor. inverter design which i am following in a full H-bridge circuit containing power mosfets. now i have to generate variable frequency PWM signles using MCU, for that purpose i am using pic18f4431. here is the result of simulation which i am also getting on hardware.
now, have a look at the 10ms delay, during which both the channels are off (which i cant bear when actually driving a motor). the 10ms delay is due to the fact that i am checking adc value every now and than to varry the frequency, if the user wants.
any solutions ? so that i am unable to check the adc value as well as both the pwm channels operate without delay (continuesly) . comments are appreciated
now, have a look at the 10ms delay, during which both the channels are off (which i cant bear when actually driving a motor). the 10ms delay is due to the fact that i am checking adc value every now and than to varry the frequency, if the user wants.
any solutions ? so that i am unable to check the adc value as well as both the pwm channels operate without delay (continuesly) . comments are appreciated