吊舱式推进器中的伺服电机控制

Servo Motor Control of the Podded Thruster

吊舱式推进器是二十一世纪后研发出来的新型推进装置,既能减轻载荷又可以提高舰船总体性能。本文主要研究推进器中的永磁同步电机的转速控制问题,结合SVPWM空间矢量脉宽调制技术和模糊PI原理设计的控制器,在电机转速控制的稳定性方面有很大提升。SVPWM原理能明显减小逆变器输出电流的谐波成分及电机的谐波损耗,降低脉动转矩,且其控制简单,数字化实现方便,电压利用率高。模糊控制器可以简化系统设计复杂性,特别适用于非线性、时变的系统。

Podded thrusters, both can decrease the load and can improve the overall performance of ship, are the 21st century developed new propulsion device. This paper mainly studies the propeller of the permanent magnet syn- chronous motor speed control problems, combined with SVPWM space vector pulse width modulation technology and design principle of the fuzzy PI controller, has a lot to improve in stability of motor speed control. SVPWM principle can decrease the harmonic loss of motor, decrease the harmonic component of inverter output current and reduce pul- sating torque; in addition its control is simple and easy digital realization, high voltage utilization ration. Fuzzy con- trol can simplify the complex process of system design, and especially apply to nonlinear, time-varying and indetermi- nation model system.