【 Weak current College 】 power amplifier power system---Power By 【 China power house network 】

Power amplifier power system
A high-quality power amplifier, power supply system to supply power amplifier circuit voltage smooth and pure, so we generally see amplifier power is necessary to explore, examine the audio manufacturers commonly used design methods, its purpose is to know how to make voltage stability, no noise from the power supply system. A cumbersome power amplifier, the material cost is significant. The use of materials foot course has its reasons, such as large transformer and thick wire can reduce resistance loss and large capacitors can increase the storage capacity of the electric charge. But how to say it, without limits of the General Assembly will not lead us to expect results? if power 1W of fore, you give it the power of 2000W and give it a 1000 Watt power supply is not much difference, rational and effective use of materials control is worthy of study. Power system usually consists of transformers, filter capacitors, filter inductor, Rectifier diodes, Zener and constant current circuit, etc. Transformer in program all transformers, toroidal transformers should say is one of the best, from power, size, weight, and also the lightest, moreover low noise, no magnetic flux is also its advantages. Is typical of type b power amplifier, a per-channel Amplifier 200W continuous output, need of 700W power supply requirements of the transformer is nearly 2000VA capacity, if not impossible, maybe 2000VA reached 200W continuous output power. Some amplifier of CPI and are not designed for continuous output, then the other. If it is pure class a, rated power per channel Amplifier 200W of all have to have a 1000 Watt power supply, the transformer must be 3000VA is enough, not less. So a sufficient supply of transformer weight 3000VA we can imagine that probably dozens of kilos. Low noise is also a transformer's pursuit of one of the key points, sometimes transformers will use tiehe shield up to reduce leakage flux, such practices often visible, is also very effective.