移相法在H半桥型励磁电流开关功放中的应用  

Application of Phase Shifting Method to H Half-bridge Excitation Current Switching Power Amplifier

作　　者：王森[1] 沈建清[1] 翟小飞[1] 

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033

出　　处：《船电技术》2012年第1期9-13,共5页Marine Electric & Electronic Engineering

基　　金：国家自然科学基金资助项目(51077131)

摘　　要：本文提出采用两路占空比相同但具有一定相位差的PWM控制方法，可以在不影响响应速度的情况下减小电流纹波。分析了H半桥型励磁功放工作原理，给出了0～180。移相的电流纹波统一计算公式。以应用的开关功放为例，进行大量的仿真和实验，结果表明了上述理论分析和纹波计算公式的正确性。该方法简单有效，具有一定的应用价值。A proper control method which is of two same duty ratio PWM signals with different phases is proposed to reduce the current ripple without effecting the response speed. The working principle of the H half-bridge excitation current switching power amplifier is analyzed and the calculation function current ripple with 0-180° phase shift is obtained. By using a practical switehing power amplifier as an illustrative example, numerical simulation and experimental method are implemented. The consistency of the simulation results and experimental results indicate that foregoing theoretical analysis and the current ripple calculation function are reasonable. The phase shifting method is valuable and easy to implement in practice.

关 键 词：移相法 开关功放 H半桥电路 励磁电流功放 

分 类 号：TN722.7[电子电信—电路与系统]