STMCWB不允许进入最大占空比

嗨吉吉，


我的应用使用两个绝缘电流传感器。在此配置中，STMCWB不允许我进入最大占空比（控制级 - >模拟输入 - >相电流反馈 - >最大调制）。逆变器MOSFET驱动器使用高侧自举，这要求我限制最大占空比，否则失速的电机可能导致高侧栅极电压不足。由于二极管自举是提供浮动高端驱动器电源的最常见方式，因此几乎所有功率级都需要占空比限制。然而，STMCWB使这个领域变灰并迫使其达到100％。我目前通过在右侧头文件中手动覆盖设置来帮助自己（例如#define MAX_MODULAtiON_95_PER_CENT），希望这具有所需的效果。

如果可以在所有配置中将此值更改为可更改的STMCWB，那将会很棒。

问候
坦率



以下为原文




Hi Gigi,


my application uses two insulated current sensors. In this configuration, STMCWB does not allow me to enter the maximum duty cycle (Control stage -> Analog inputs -> Phase current feedback -> Maximum modulation). The inverter MOSFET drivers use high side bootstrapping, which requires me to limit the maximum duty cycle, otherwise a stalled motor could cause insufficient high side gate voltage. As diode bootstrapping is the most common way to provide floating high side driver supply, almost all power stages will require duty cycle limitation. However, STMCWB grays out this field and forces it to 100%. I currently help myself by overwriting the setting manually in the right header file (e.g. #define MAX_MODULATION_95_PER_CENT), hoping this has the desired effect.

It would be great if this value could be made changeable STMCWB in all configurations.

Regards
Frank