--BawA--
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hii,
i have generated a UNIPOLAR SPWM scheme for driving the Hbridge , these signal are generated from DSPIC33FJ32MC202 using MCPWM1 module. i have made the code on MIKROC PRO and simulated the setup on PROTEUS.
carrier frequency is 20KHz
fundamental frequency is 50Hz
deadtime is 2us.
below are some images of the simulations
when i apply a RC filter to the SPWM signal generated from the MCU in proteus, i get the half sine wave of time period 10ms which is quite obvious but the amplitude of sine wave is only 2.2V ,however the SPWM signal has the amplitude of 5V .i have also tried different R,C combinations but amplitude of sine wave was same. below is the image
in above image the amplitude of carrier is 5v ,but the amplitude of sine is only 2.2V approx.
can anyone tell me, whether it is normal ,or some modification is needed. also verify the above SPWM signals.
i have generated a UNIPOLAR SPWM scheme for driving the Hbridge , these signal are generated from DSPIC33FJ32MC202 using MCPWM1 module. i have made the code on MIKROC PRO and simulated the setup on PROTEUS.
carrier frequency is 20KHz
fundamental frequency is 50Hz
deadtime is 2us.
below are some images of the simulations
when i apply a RC filter to the SPWM signal generated from the MCU in proteus, i get the half sine wave of time period 10ms which is quite obvious but the amplitude of sine wave is only 2.2V ,however the SPWM signal has the amplitude of 5V .i have also tried different R,C combinations but amplitude of sine wave was same. below is the image
in above image the amplitude of carrier is 5v ,but the amplitude of sine is only 2.2V approx.
can anyone tell me, whether it is normal ,or some modification is needed. also verify the above SPWM signals.