CAJ | 학술논문

针对Boost型功率变换器的常规控制算法存在系统带宽较窄、动态响应缓慢等问题,基于电容电荷平衡原理提出一种新的非线性控制方案.该控制方案采用线性/非线性相结合的复合控制方法,当Boost变换器工作在稳态时采用传统的电压模式控制算法,而当负载电流发生跃变时,则采用非线性控制算法,通过电容电荷平衡控制计算开关管开通和关断的切换时间,从而保证Boost变换器获得最佳的动态性能.对自制的样机进行仿真验证和实验研究,结果表明,该方案能明显改善Boost型DC/DC变换器的超调量、调节时间等动态性能.
침대Boost형공솔변환기적상규공제산법존재계통대관교착、동태향응완만등문제,기우전용전하평형원리제출일충신적비선성공제방안.해공제방안채용선성/비선성상결합적복합공제방법,당Boost변환기공작재은태시채용전통적전압모식공제산법,이당부재전류발생약변시,칙채용비선성공제산법,통과전용전하평형공제계산개관관개통화관단적절환시간,종이보증Boost변환기획득최가적동태성능.대자제적양궤진행방진험증화실험연구,결과표명,해방안능명현개선Boost형DC/DC변환기적초조량、조절시간등동태성능.
@@@@In view of the limitation on the performance of the Boost converter when the general controller is used, such as low-bandwidth and sluggish dynamic response. This paper proposes a novel nonlinear control scheme which is based on the capacitor charge balance control (CBC). Combined with the linear/nonlinear control method, the traditional voltage mode control is taken during the steady-state of the Boost converter, the scheme switches to the nonlinear control method while the load current has a step change. Using the CBC algorithm during the calculation of the switching time, the optimal dynamic performance of the Boost converter is achieved. Finally, the simulation results and the experimental results of the prototype show that the proposed algorithm, compared with the traditional voltage mode control, can significantly improve the dynamic performance of the Boost converter, such as the overshoot, dynamic setting time.