ZCS从电源开关为关的初始状态开始，(因此)没有电流流过谐振线圈。
ZCS starts from an initial condition where the POWER SWITCH is off and there is no current flowing through the resonant INDUCTOR.
具体就是运用了一个叫做谐振耦合的现象。在此现象中，以相同频率随着电子频率一起振动的金属线圈能够高效的传输能量。
Specifically, it exploits a phenomenon called resonant coupling, in which metal coils that resonate at the same electrical frequency can exchange energy particularly efficiently.
设计相阵控线圈要考虑谐振频率，阻抗匹配，互阻抗等问题。
When the phased array coil designed, such problems have to be taken into account as resonant frequency, impedance match, mutual impedance and et al.
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