power measurement in three-phase systems 三相功率测量
three phase systems 三相体系
unbalanced three-phase systems 三相不对称系统
three-phase three-wire systems 三相三线制系统
three phase power systems 三相电力系统
three-phase power systems 三相电力系统
three-phase ungrounded power systems 三相不接地系统
three-phase distribution power systems 三相配电网
three-phase grid-connected PV systems 三相并网光伏发电系统
Thus two-phase relative permeability data had to be amplified and extended for three-phase systems.
因此，两相相对渗透率必须拓展为三相相对渗透率，以适应三相流体体系。
These disadvantages could be eliminated in three-phase systems if the energy account based on the integral of the active power of the positive sequence component with the fundamental harmonic.
在三相系统中，以正序基波功率的积分作为计量标准，同样可以消除这两方面的不利影响。
This article mainly discusses the designations of three-phase BLDCM velocity modulation systems hardware.
本文主要论述三相直流无刷电机调速系统的硬件设计方法。
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