This paper proposed an improved sensorless control strategy for ship electric propulsion which bases on I/f control and back electromotive force integral (EMF). suppressing the speed fluctuation during algorithm switching. improving the flux estimation accuracy of internal permanent magnet synchronous motors (IPMSMs) and achieving the stable operation of the motor. Firstly. https://fitnessgravesyardes.shop/product-category/self-aligning-bearing/