25HZ 25HZ frequency power divided by the railway, also known as power, mainly used in electric railway. With the power electronics technology and the rapid development of microelectronics technology, the 25HZ power supply to the high-frequency, modular direction, the conventional 25HZ power frequency fields using core fonts, the use of magnetic resonance principles produces 25HZ AC, although this kinds of traditional power with high reliability, but there are a lot of shortcomings, mainly large in size, low efficiency, the impact of starting large, 25HZ large waveform distortion. New 25HZ power frequency conversion by LCI and PWM technology, small size, high efficiency, small waveform distortion, and so on.

50HZ frequency power supply is mainly used in aviation, aerospace, military and other places without power frequency, such as helicopters, transport planes and other aircraft are used 400HZ power, and machines often need to power-frequency 50HZ, 50HZ frequency power supply voltage may be 110V ~ 220V 0 ~ 500Hz frequency power conversion 220VAC (or 380VAC), 50Hz standard frequency power.

Mainly used in 60HZ power frequency from the United States, South Korea and some other countries 60HZ imported electricity standard equipment, such as medical equipment, electronic manufacturing equipment, the use of variable frequency power supply 60HZ allows users to play imported equipment used and the performance of the same origin .

400HZ frequency power supply to 220VAC (or 380VAC), 50Hz power into 115V, 400HZ frequency single-phase or three phase power, widely used in aviation, aerospace, communications, military and Experimental Research.