目前除采用一般的直流电外，根据实际的需要还可采用周期换向电流及脉冲电流。
At present in the general of dc outside, according to the actual need to still can use cycle reversing current and pulse current.
本文考察和研究了脉冲电镀及周期换向电镀法中各项脉冲参数对钯-镍合金的镀层成份、电流效率的影响。
The effects of pulse and periodic current parameters on the composition of Pd -ni alloy deposit and on the current efficiency of the electrodeposition process have been studied.
由于负向电流可以腐蚀削减铸层表面微观突起的生长高度，因此周期换向脉冲电流微电铸与单向正脉冲电流微电铸相比更易获得较好的铸层均匀性。
Because the height of micro tips on cathode surface can be eroded by the negative current, surface finishing is better in the micro-electroforming by periodic reverse pulse current than pulse current.
它与换向电流所不同的是不把镀件作阳极，而是间歇地停止供电，由于间歇中断电流，阴极电位随时间周期性地变化。
It and reversing current different is not to be, but with a anode intermittently stop, because the intermittent power supply current interrupted, cathode potential with time periodically change.
由于该换向器的使用寿命提高，从而可延长电机的使用周期。
Because the service life of the commutator is improved, the use cycle of an electrical motor can be prolonged.
在该系统中，可燃预混气周期性换向，分别从两端流入燃烧器。
In this system combustible premixed gases change their direction periodically, and flow into a combustor from two ends.
交流电：周期性换向的电流，和直流电不一样。
Alternating current (AC) : Flow of electric charge that reverses periodically, unlike direct current.
交流电：周期性换向的电流，和直流电不一样。
Alternating current (AC) : Flow of electric charge that reverses periodically, unlike direct current.
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