Abstract : This paper proposes a dead-time compensation scheme to address the impact of dead time on the output voltage of a PWM voltage-source inverter. The scheme determines the sign of the three-phase stator current of the induction motor by using the current vector space angle, and derives the compensation amount for the three-phase stator voltage. Experiments demonstrate the effectiveness of the scheme. Keywords : Current vector dead-time compensation inverter 1 Introduction In PWM inverters, to prevent shoot-through between two power switching devices on the same bridge arm, a dead time is usually artificially added. However, the addition of dead time will lead to a series of adverse effects, such as increased harmonic content of the motor stator terminal voltage, reduced voltage utilization, and torque ripple. Domestic and foreign scholars have proposed many different compensation schemes to reduce these adverse effects of dead time, such as using the detected polarity of the three-phase current to pre-calculate the compensation amount to compensate for the impact of dead time; or using hardware to detect the polarity of the current for compensation. However, these schemes usually require additional hardware or complex software programs. This paper analyzes the impact of dead time on the inverter output voltage and proposes a novel dead-time compensation scheme. This scheme determines the sign of the stator current by judging the spatial angle of the stator current vector, and then proposes a method for compensating the three-phase stator voltage in a stationary coordinate system. Compared with the scheme of Takashisukegawa et al., this scheme does not require coordinate transformation of the compensation value of the three-phase stator voltage, making it simple to implement. This scheme is not only applicable to vector control frequency converters, but also to constant voltage-frequency ratio general-purpose frequency converters, which has stronger versatility. The effectiveness of the above-mentioned scheme has been verified by experiments. 2. Influence of Dead Time on Output Voltage Figure 1 shows the connection diagram of one phase bridge arm of the inverter. During the dead time, the two power switching devices T1 and T2 are both in the off state. Since the motor itself is an inductive load, the current cannot change abruptly, so the current flows through the freewheeling diodes D1 and D2. When D1 is on, the output is high-level; when D2 is on, the output is low-level. [b][align=center]For details, please click: A Dead Time Compensation Scheme Based on Current Vector[/align][/b]