This paper proposes an interior-permanent-magnet synchronous generator suitable for wide-speed-range operation and its DC voltage control strategy, which makes this system a promising candidate for 270V DC power system in more electric aircraft applications. The machine is designed and manufactured to have a strong field-weakening capability. An active rectifier is utilized for DC-link voltage stabilization with field-oriented control. The active damping technique is considered in the PI controller, which can shorten the transient of the DC-link voltage when the load changes. Design consideration on strengthening the PM machine's field-weakening ability is briefly presented, and a prototype has been built and tested. The proposed field-oriented control with the active damping has been implemented in simulation over a speed range of 150~1500rpm, changing from no-load to load condition. Experimental tests are also carried out in order to verify the effectiveness of the proposed system.