A novel method to compensate non-linearity of inverter in sensorless operation of PMSM

摘要

The non-linearity of an inverter can be modeled as the distorted voltages. A novel method utilizing the trapezoidal voltages is proposed to cancel out the distorted voltages by the non-linearity. By modulating the shape of the trapezoid, the harmonic distortions in the output currents and the voltage references can be reduced. An integral controller is employed to modulate the trapezoid with simple signal processing. To evaluate the effectiveness of the propose method, the conventional methods are compared through the experimental results.