• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Power Electronics, IET >Hybrid controller for mid-power audio application
【24h】

Hybrid controller for mid-power audio application

机译：用于中功率音频应用的混合控制器

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Driving current of a moving coil loudspeaker, fed from a switched voltage-mode audio amplifier, display non-ideal transfer characteristic relative to the reference audio signal. This is chiefly due to the effective speaker voice coil electrical impedance and phase lag provided by the output filter. This study investigates the deviation in the transfer characteristics from the ideal constant gain and zero-lag properties and proposes a hybrid controller to mitigate the drawback. The hybrid controller comprises a sliding-mode controlled amplifier (SMCA) which has a non-linear control law and ensures maximal command following among voltage-mode algorithms, realisable under switching frequency and filter size constraints. Additionally, a linear controller fine-tunes the speaker current and its design is based on the transfer function of the SMCA and loudspeaker, which are least-square approximated from experimental frequency response data. A 20 W amplifier, driving a 4 Ω speaker load, is developed and experimental results obtained there from establishing the improved electric to acoustic signal conversion using the hybrid controller.
机译：从开关电压模式音频放大器馈入的动圈扬声器的驱动电流显示相对于参考音频信号的非理想传输特性。这主要归因于有效的扬声器音圈电阻抗和输出滤波器提供的相位滞后。这项研究调查了传输特性与理想的恒定增益和零滞后特性之间的偏差，并提出了一种混合控制器来减轻这一缺点。混合控制器包括一个具有非线性控制律的滑模控制放大器（SMCA），可确保在电压模式算法中遵循最大指令，并可以在开关频率和滤波器尺寸约束下实现。此外，线性控制器可微调扬声器电流，其设计基于SMCA和扬声器的传递函数，它们是从实验频率响应数据中最小二乘的近似值。开发了一个20 W放大器，用于驱动4Ω扬声器负载，并通过使用混合控制器建立改进的电声信号转换而获得了实验结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号