Most traditional position sensorless control algorithms for dual three-phase permanent magnet synchronous motors (PMSMs) rely on extracting the back electromotive force (EMF) to estimate rotational speed and rotor position. These algorithms will fail under low-and zero-speed operating conditions. In order to solve this problem, a sensorless algorithm for a dual three-phase PMSM based on fundamental pulse width modulation (PWM) excitation is proposed. The rotor position, even under low-and zero-speed conditions, can be accurately tracked. This method uses the mathematical model of the dual three-phase PMSM and its saturation saliency effect to extract rotor position information contained in the current variation rate during one PWM period, so as to achieve position sensorless control. The correctness of the algorithm is verified in simulation. Finally, the reliability of the algorithm under various operating conditions is verified on a dual three-phase PMSM experimental platform.