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TMS320F280049C: HRPWM模式下 TBPHS和THPHSHR设定值 实现的移相方向不一致

Aiden zhang
Expert 2275 points
Part Number: TMS320F280049C
Other Parts Discussed in Thread: C2000WARE

ePWM1 和 ePWM4配置都为 UP模式，ePWM1 为master ，ePWM4为slave

HRPWM寄存器配置如下：

问题：当从小到大调整ePWM4的TBPHS值进行移相时，TBPHS值越大，ePWM4相对ePWM1超前量就越大。

           当TBPHS保持不变，从小到大调整TBPHSHR值进行移相时，TBPHSHR越大，ePWM4相对ePWM1超前量就越小。二者的效果相反。

测试波形：

改变TBPHS，TBPHSHR不变

1、TBPHS = 0x04，Tdelt = 17ns

2、TBPHS = 0x05，Tdelt = 27ns

3、TBPHS = 0x06，Tdelt = 37ns

改变TBPHSHR，TBPHS不变

1、TBPHS = 0x04，TBPHSHR = 0x2600  Tdelt = 17ns

2、TBPHS = 0x04，TBPHSHR = 0x5000  Tdelt = 15.6ns

3、TBPHS = 0x04，TBPHSHR = 0x7B00  Tdelt = 13.8ns

4、TBPHS = 0x04，TBPHSHR = 0xA500  Tdelt = 12.4ns

5、TBPHS = 0x04，TBPHSHR = 0xD000  Tdelt = 11ns

请帮我分析一下是哪里配置不对，谢谢。