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TMS320F280049C: single chip to drive three PMSM

Part Number: TMS320F280049C
Other Parts Discussed in Thread: C2000WARE

Hi All

Customer consider whether single F280049 can used to drive three PMSM? (300VDC input with IPM power module)

Because F280049 have only 8 set ePWM module, assume ePWM 1&2&3 for motor1, ePWM 4&5&6 for motor2, then only remain ePWM7&8 for motor3 and still miss 2ch PWM signal.

Proposal A :  use 2 set eCap module to generate 2ch PWM signal for motor3.  

Proposal B :  use 2 set CLB module to generate 2ch PWM signal for motor3.

The difficult is whether eCap or CLB can align the count with ePWM and whether can general supplementary waveform with deadtime? how do you think?