Especially the large number of control motors used in industry automation, office automation and home automation are nearly all controlled by electric and electronic devices.
特别是在工业自动化，办公室自动化和家庭住宅自动化方面使用的大量控制电机，几乎都采用电力电子器件进行控制。
With more application of electric and electronic devices on ship, more and more nonlinear loads take higher demand for reliability and fault prevention of power station control.
随着电力电子设备在船舶中的大量应用，非线性负载的增多，对船舶电站控制的可靠性及故障预防提出了更高的要求。
There are numerous electric contacts in electronics, electric-power and automatic control system. Their capability affects the reliability of electric and electronic devices directly.
电接触广泛存在于电子和电力系统中，元件之间、电路之间、设备之间乃至元件内部之间都需要可靠的电子连接。
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