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Classification of AC power supply and features:
Can provide a stable voltage and frequency AC power, said power supply stability. At present, the work done by most manufacturers AC voltage stability. The following AC power supply with the market briefly some characteristics of its category.
1. Parameter adjustment (resonance) type
Such power supply, the regulator of the basic principle is that LC series resonance, the early emergence of magnetic saturation regulator to fall into this category. It has the advantage of simple structure, no large number of components, the reliability of high voltage fairly wide range, strong anti-jamming and anti-overload. drawback is energy consumption, noise, heavy and high cost. The principle of magnetic saturation on the basis of the parameters of the development into the regulator and the formation of the 50s have been popular in China, "magnetic amplifier voltage regulator adjustable electronic communication" (ie, type 614) are the principle of exchange of such regulator.
Auto (variable ratio) adjustable
2. Mechanical regulator type
That is driven by servo motor carbon brush autotransformer windings in the sliding surface moves, changing the ratio of Vi Vo on in order to achieve output voltage regulation and stability. The kind of regulator from a few hundred watts to several kilowatts. It is characterized by simple structure, low cost, output waveform distortion; but because of the carbon brush sliding contacts is easy to produce sparks, causing damage and even burn brush lapsed; and slow voltage regulation.
3. Change the tap-type
Will be made of several fixed-tap autotransformer, through the relay or triac (SSR) as the switching device 10, automatically change the tap position to achieve a stable output voltage. Advantages of this type of regulator is the circuit is simple, wide voltage range (130V-280V), high efficiency (≥ 95), low prices. The disadvantage is the low voltage accuracy (± 8 ~ 10) working life is short, it applies to the air conditioner in the family power.

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