说明：  介绍了Boost 电路的工作原理， 详细解 析了利用其实现最大功率跟踪（MPPT） 的理论依据， 给出了适用于MPP T 控制的Boost 电路参数选择方法 和改进方案。对所述变换电路进行Multisim 软件仿真 研究和实际电路调试， 并验证了理论分析、设计方法 和改进方案的合理性。
(The operating principles of the Boost circuit are introduced. The theoretical basis of realizing the maximum power point tracking （ MPPT） by using the circuit is analyzed in detail. The parameter selection methods and improving scheme of the Boost circuit which are suitable for MPPT control are given. Multisim simulation software study and the actual circuit debugging of the above-said conversion circuit have been conducted. The rationality of theoretical analysis， design methods and improving scheme have been verified.)