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开关变压器工作原理
Time:2018-3-3 Read:
"Switching transformer" generally refers to the transformer switching power supply ", working in more than a dozen to several hundred kilohertz kHz or even pulse frequency, core using ferrite materials.
Switch transformer is generally to switch state; when the input voltage is DC pulse voltage, called unipolar pulse input, such as single flyback switching power supply transformer; when the input voltage is AC pulse voltage, called bipolar pulse input, such as double flyback switching power supply transformer; therefore, switch transformer also can be called the pulse transformer, because the input voltage is a pulse sequence; but when the real contest of the switch transformer and pulse transformer is a difference in principle, because the switch also points forward and flyback transformer output. .
In a power transformer circuit in general, when the input voltage of the transformer at both ends of the 0, said input end is short, because the internal resistance of the power supply can be seen as 0; while in the switch transformer circuit, when the input voltage of the transformer switch 0, said input end is open, because the internal resistance of the power supply can see as the infinite.
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