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An Improved Current-Controlled Tristate Switching Power Amplifier for Magnetic Bearings Based on Sample-Hold Strategy
Author(s): 
Pages: 85-90
Year: Issue:  10
Journal: TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY

Keyword:  开关功放磁轴承采样-保持电流三态调制;
Abstract: 提出一种改进的基于采样-保持策略的电流三态调制开关功放.它保留了基本采样-保持开关功放控制简单、动态响应快、频带宽、受负载影响小等优点,同时降低了开关功放的电流纹波和损耗,提高了功放的效率.此外还可以在不影响系统其他性能的情况下,通过提高输入电压来进一步提高系统的动态特性.同时还阐述了该改进型开关功放的工作原理及电路实现,对改进前后的开关功放进行了仿真比较,并通过对两种开关功放原理样机的实验测试,验证了改进型开关功放的优越特性.
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