Part Number: TMS320F28377S
Hello,
I'm implementing 3-Phase PMSM. Everything is already nice configured except the phase shift.
There is absolute zero phase shift expected.
Initialy I set the same PWM 50% for all ePWMs.
With TBPHS == 0 for slave ePWMs I get 20ns delay (slave goes high later as master) what is already documented in TRM.
With any value, e.g. TBPHS == 2 the slave goes high 40ns later. The bigger the TBPHS for slave the bigger is the phase shift.
But I have to shift the slave in opposite direction.
| EPwm1Regs | EPWM Registers | |||
| TBCTL | 0x0012 | Time Base Control Register [Memory Mapped] | ||
| FREE_SOFT | 00 | Emulation Mode Bits | ||
| PHSDIR | 0 | Phase Direction Bit | ||
| CLKDIV | 000 | Time Base Clock Pre-scaler | ||
| HSPCLKDIV | 000 | High Speed TBCLK Pre-scaler | ||
| SWFSYNC | 0 | Software Force Sync Pulse | ||
| SYNCOSEL | 01 | Sync Output Select | ||
| PRDLD | 0 | Active Period Load | ||
| PHSEN | 0 | Phase Load Enable | ||
| CTRMODE | 10 | Counter Mode | ||
| TBPHS | 0x00000000 | Time Base Phase High [Memory Mapped] | ||
| TBPHS | 0000000000000000 | Phase Offset Register | ||
| TBPHSHR | 0000000000000000 | Extension Register for HRPWM Phase (8-bits) | ||
| TBPRD | 0x0C35 | Time Base Period Register [Memory Mapped] | ||
| TBPRD | 3125 (Decimal) | Time base period register | ||
| CMPA | 0x00000000 | Counter Compare A Register [Memory Mapped] | ||
| CMPB | 0x061A0000 | Compare B Register [Memory Mapped] | ||
| CMPB | 0000011000011010 | Compare B Register | ||
| CMPBHR | 0000000000000000 | Compare B High Resolution Bits | ||
| EPwm2Regs | EPWM Registers | |||
| TBCTL | 0x0006 | Time Base Control Register [Memory Mapped] | ||
| FREE_SOFT | 00 | Emulation Mode Bits | ||
| PHSDIR | 0 | Phase Direction Bit | ||
| CLKDIV | 000 | Time Base Clock Pre-scaler | ||
| HSPCLKDIV | 000 | High Speed TBCLK Pre-scaler | ||
| SWFSYNC | 0 | Software Force Sync Pulse | ||
| SYNCOSEL | 00 | Sync Output Select | ||
| PRDLD | 0 | Active Period Load | ||
| PHSEN | 1 | Phase Load Enable | ||
| CTRMODE | 10 | Counter Mode | ||
| TBPHS | 0x00020000 | Time Base Phase High [Memory Mapped] | ||
| TBPHS | 0000000000000010 | Phase Offset Register | ||
| TBPHSHR | 0000000000000000 | Extension Register for HRPWM Phase (8-bits) | ||
| TBPRD | 0x0C35 | Time Base Period Register [Memory Mapped] | ||
| TBPRD | 3125 (Decimal) | Time base period register | ||
| CMPA | 0x0C2F0000 | Counter Compare A Register [Memory Mapped] | ||
| CMPB | 0x061A0000 | Compare B Register [Memory Mapped] | ||
| CMPB | 1562 (Decimal) | Compare B Register | ||
| CMPBHR | 0000000000000000 | Compare B High Resolution Bits |
