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There is almost no attention to the EMC performance requirement of electronic and electrical product before, but more and more countries and organizations take EMC as the essential performance evaluation of electronic and electrical. Our country also take EMC as the performance evaluation in the CCC State Compulsory Certification which was strated executing on august […]
Apparent power is the product of the ac voltage and ac current. Expressed in formula is: S = UI. In the formula, S is the rated power output, the unit is VA (ei); U is rated output voltage, the unit is V, such as 220 V, 220 V, etc.; I was rated output current, the […]
Power factor shows the capacity of the active power output of lamps and lanterns. Power is the rate of energy passing, and it is the multiply of dc voltage V and current . It is more complicated in communication system: part of the alternating current loop does not transmit power in the load, it is […]