Because of the emphases research of magnetic bearing at home and abroad is DC active magnetic bearings (AMBs) at present, and the cost of DC power amplifiers is much higher than ac power converters.
目前国内外对磁轴承的研究多为直流式磁轴承，而直流开关功率放大器相对于交流逆变器来说其体积大、功耗大及成本高。
Because of the emphases research of magnetic bearing at home and abroad is DC active magnetic bearings (AMBs) at present, and the cost of DC power amplifiers is much higher than ac power converters.
目前国内外对磁轴承的研究多为直流式磁轴承，而直流开关功率放大器相对于交流逆变器来说其体积大、功耗大及成本高。
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