Space Vector Pulse Width Modulation Null Vector Omission

The patent applies preliminary action by extending the null pointer duration at the beginning and end of the PWM period in advance, so that the total null pointer time equals the removed middle null pointer time. This allows the switching state to be prepared beforehand, avoiding the need to set a null vector for a very short time that would violate the hardware switching constraints of tMin.

The patent applies the taking out principle by removing the middle null pointer from the PWM period, which eliminates unnecessary switching operations during the active modulation phase. This extraction of the null pointer from its traditional middle position reduces switching losses by one-third while the null pointer time is redistributed to the beginning and end of the period to maintain the maximum degree of modulation.

The patent applies dynamics by making the control strategy adaptive: the middle null pointer is removed only when the calculated maximum degree of modulation exceeds the achievable limit with traditional methods. The extension of null pointers to the beginning and end of the PWM period is dynamically adjusted based on the modulation requirements, allowing the system to optimize performance while managing control complexity through conditional implementation.