TīmeklisThe per unit conversion is based on the transformer rated power Pn in VA, nominal frequency fn in Hz, and nominal voltage Vn in Vrms, of the windings. Nominal power and frequency [Pn(VA) fn(Hz)] — Nominal power and frequency [250e6 60] (default) The nominal power rating Pn in VA and frequency fn in Hz, of the transformer. ... Tīmeklis交流电的频率是[1] 指它单位时间内周期性变化的次数,单位是赫兹(Hz),与周期成倒数关系。 日常生活中的交流电的频率一般为50Hz或60Hz,而无线电技术中涉及的交流电频率一般较大,达到千赫兹(KHz)甚至兆赫兹(MHz)的度量。 频率单位 物理中频率的基本单位是赫兹(Hz),简称赫,也常用千赫(kHz)或兆赫(MHz)或吉 …
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