中文摘要：

在磁悬浮系统的功放中采用0PA544功率器件实现对系统输出负载电流的放大作用，其性能将随功放的类型而变化。针对毫米级气隙的悬浮系统，设计前级PID控制调理电路，与0PA544功率放大器配合实现差动式电流控制，最终在一台主动磁悬浮平板试验台上实现系统的稳定悬浮，仿真结果与试验情况基本吻合。

英文摘要：

Adopt power amplifier OPA544 to amplifier the output load current to achieve the system＇s current increasing. The controlling model was designed and PID controlling strategy was selected, therefore system＇s simulation was achieved on a basis of the whole module＇s parameters. The order of magnitude for the air gap or the displacement was millimeter. As to suspension under control, design PID controlling circuit to attain the full current. The use of two electronic component of OPA544 could realized push-pull power amplifier control thoughts, and then achieved the establishment of active magnetic plate＇s dynamic equilibrium, and better system stability was gained. Actual experiments and facts dovetailed nicely with simulation as for the comparison with the virtual results.