TMS320F280025C: How to trigger ADC on center align PWM mode

Raj

Part Number: TMS320F280025C
Other Parts Discussed in Thread: C2000WARE

Hi Team,

we are facing the issue while reading phase current of BLDC motor as per our research motor current should be measure as shown in image

[ We want to measure current of the motor at center of PWM channel OR at the riding edge as shown below ]

I have used EPWM1_A, EPWM1_B, EPWM2_A, EPWM2_B, EPWM4_A, EPWM4_B

I have f280025c MCU and I am using the c2000 SDK

over 2 years ago

0 Raj over 2 years ago

Intellectual 361 points

Hi Team,

I am stuck in motor current reading please guide me on my above question!!

Best and regards,

Raj

0 Joseph Casuga over 2 years ago in reply to Raj

TI__Mastermind 33125 points

Hi Raj,

The TBCTR module in the EPWM is capable of generating two trigger events, SOCA and SOCB to initiate conversion of the ADC. You can configure the counter to trigger at the middle of EPWM period. See software adc_ex2_soc_epwm in C2000Ware driverlib examples and use that as basis for your sampling trigger code.

Best regards,

Joseph

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TMS320F280025C: How to trigger ADC on center align PWM mode