Whether it is a DC power source or an AC power source, an electronic transformer (soft magnetic electromagnetic component) made of a soft magnetic core is used.
Electronic transformers, together with semiconductor switching devices, semiconductor rectifying devices, and capacitors, are called the four main components in power supply devices. According to the role in the power supply unit, the electronic transformer can be divided into:
1) Power transformers, power transformers, rectifier transformers, inverter transformers, switching transformers, pulse power transformers that function as voltage and power converters;
2) Broadband transformers, audio transformers, and mid-cycle transformers that transmit broadband, audio, mid-cycle power and signals;
3) A pulse transformer that transmits pulses, drives and trigger signals, drives the transformer, and triggers the transformer;
4) an isolating transformer that acts as an isolation barrier between the primary and secondary sides, and a shielded transformer that acts as a shield;
5) A phase-change transformer that functions as a single-phase-changing three-phase or three-phase to single-phase, and a phase-shifting transformer (phase shifter) that changes the phase of the output;
6) A frequency multiplying or frequency dividing transformer that changes the output frequency;
7) a matching transformer that changes the output impedance to match the load impedance;
8) A voltage regulator transformer (including a constant voltage transformer) or a steady current transformer that functions as a stable output voltage or current, and a voltage regulating transformer that regulates the output voltage;
9) a filter inductor that functions as an alternating current and a direct current filter;
10) an electromagnetic interference filter inductor that suppresses electromagnetic interference, and a noise filter inductor that suppresses noise;
11) a absorbing inductor that absorbs a surge current and acts as a snubber inductor that slows the rate of change of current;
12) an energy storage inductor functioning as a reversing inductor for assisting the commutation of the semiconductor switch;
13) a magnetic switch inductor and a transformer functioning as a switch;
14) a controllable inductor and a saturating inductor that regulate the inductance;
15) Voltage transformer, current transformer, pulse transformer, DC transformer, zero flux transformer, weak current transformer, zero sequence current transformer, Hall current voltage detector for transforming voltage, current or pulse detection signals . As can be seen from the above list, whether it is DC power, AC power, or special power supply, it is inseparable from the electronic transformer.
Some people define the power supply as a DC power source and an AC power source that are converted by high frequency switching. When introducing the role of soft magnetic electromagnetic components in power supply technology, various electromagnetic components in high frequency switching power supplies are often exemplified. At the same time, among the soft magnetic electromagnetic components used in electronic power sources, various transformers occupy a dominant position, and therefore transformers are used as representatives of soft magnetic components in electronic power sources, and they are called "electronic transformers".
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