The medium-voltage DC integrated power system of ships is the development direction of the integrated power system of ships and an important foundation for implementing the strategy of building a strong maritime nation. With the vigorous development of the integrated power system of ships, the load switching of high-power motors is likely to cause bus voltage fluctuations and power fluctuations in the ship power system, which has a great impact on the power system. This paper uses the Active Front End (AFE) inverter, combined with constant voltage-frequency ratio control, to form a new type of motor frequency conversion device, which has the function of quickly responding to rapid changes in grid voltage and frequency. In addition, the frequency conversion device proposed in this paper can greatly reduce reactive power loss and meet the requirements of the ship's integrated power system for quality factor. Finally, in the simulation verification, the effectiveness of the proposed control strategy is proved by comparing the uncontrolled start-up of the motor and the start-up under the adaptive collaborative control proposed in this paper.