Is the Class D power amplifier powered by Huanniu or switched power supply?

It is best to switch the power supply, which has stable output voltage, excellent performance, and good adaptability to the fluctuation of the main voltage (mains). The weight is light, and the disadvantage is that a cooling fan is needed to cool down, and there is a certain amount of noise pollution. Ring Bull:

The output is strong, resistant to overcurrent impact, and has a certain "moistening" effect, but it has a high dependence on the stability of the main voltage. Large in size and heavier in weight. It can be selected according to the actual situation, and the price is basically the same, (except for the high-grade ring cow with servo circuit, this power supply is expensive, mainly used in audiophile power amplifiers, and it is not recommended to use.) ）

Hello, I think the audio power amplifier is better to use a Huanniu transformer to power the power as well. Although the general switching power supply adapts to the dynamic range of AC power supply, it is not suitable for use as a power supply for audio power amplifiers due to its large electronic interference, large line noise and high ripple coefficient. Our power amplifier equipment needs a relatively pure DC power supply, so that the output of the amplifier will work well.

Please refer to it.

Class D amplifier. Of course, it is best to use Huanniu for power supply, and now most of the power amplifier power supplies use switching power supply, mainly because of its low cost, and the cost of Huanniu is very high.

Because the dynamic range of the power amplifier is relatively wide, it is recommended to use Huanniu, the dynamic adaptation range of the switching power supply is relatively narrow, and the failure rate is relatively high.

Toroidal transformer can only play an effect when used in dual power supply circuits, such as two groups of 12 volts is 24 volt power amplifiers, and the ground wire in the middle is crucial in the role of dual power amplifier circuits, mainly reflected in the waveform, because the output of the audio power amplifier is the required waveform, so the bass of the dual power supply sounds better because of the ground wire.

The single power supply for vehicles is 12 volts, so the ground requirements are not as non-polarized as the dual power supply, as long as the output of the switching power supply is large enough, and the 30 amperes you said are enough.

The biggest advantage of toroidal transformer is that it has small magnetic flux leakage, high efficiency and relatively low cost, so it is widely used in domestic power amplifiers. However, imported power amplifiers (especially Japanese power amplifiers) do not use Huanniu, but are all E-type transformers.

As for the switching power supply, it is mainly because the stability is not as good as that of Huanniu and E Niu, so it is not used as the main power supply.

In addition, the stability and heat dissipation effect of the switching power supply are far less than that of the toroidal transformer, especially in the audio power amplifier, compared with the switching power supply, the advantages of the Huanniu transformer are small magnetic leakage, low noise, fast heat dissipation, high efficiency, and relatively low cost. Therefore, Huanniu transformer is irreplaceable by switching power supply in many cases.

1st floor: small magnetic leakage and high power density. Coupled with the rapid development of the ring winding machine, the cost of winding ring cattle is low.

EI Niu is the standard configuration of the previous power amplifier power supply. The switching power supply also has high requirements for power amplifiers. Because the switching power supply needs to be regulated, the high-current performance is not good enough.

Noise is also a big problem.

2nd Floor: The toroidal core is a closed-circuit core, and there is no air gap in the magnetic circuit, so the magnetic leakage is low, and the probability of generating spike current is small. Other cores that need to be ground cannot be 100% guaranteed to have no air gaps between mating surfaces.

Therefore, the magnetic flux leakage must be larger than that of a toroidal core. The chance of generating spike currents is greater than that of toroidal cores. As said on the second floor, the winding cost of Huanniu is also lower than that of other shapes of cores, and the switching power supply is not good enough for high current performance because of the need to stabilize the voltage.

Noise is also a big problem. Choosing a toroidal core should be the best.

These are two of the several answers selected for you in the Big Bit Technology Forum, if you still have any questions, you can log on to the forum and ask the experts over there! If it helps you, I hope to take the answer!

Original post: Why do you use Huanniu for the power amplifier, instead of switching power supplies and E-type transformers.

The power amplifier is mainly used for Huanniu transformer, mainly because of the strong overload capacity, and the switching power supply is the most afraid of overload, and the magnetic flux leakage of the E-type transformer is larger than that of the Huanniu transformer.

Summary. The premise of the same power ring cow is mainly the different grouping of output voltage and current, that is, the same ring cow for power amplifier, and the voltage and current of the output group are not the same in different brands of power amplifiers. Therefore, for the choice of a power amplifier, it is best to choose the same brand and model of the same amplifier.

Dear This question is up to me, it takes a little time to type, and please be patient I have a pair of such speakers, and then when I choose the power amplifier, what size of the ring cow should be used? 300 or 600

The main problem is that the output voltage and current are grouped differently, that is, the same power amplifier is used for the ring, and the voltage and current of the output group are not the same. Therefore, for the choice of a power amplifier, it is best to choose the same brand and model of the same amplifier. Sell balance.

Summary. The power transformer of audio equipment is the key component that affects the performance of the audio amplifier, the winding of the toroidal transformer is not wound on both sides, but the inner and outer stacking, its iron core is made of high magnetic flux grain orientation cold-rolled silicon steel strip winding, such winding process and iron core magnetic circuit make its magnetic flux density high, magnetic flux leakage small, internal resistance is small, and the efficiency is high.

The power transformer of the audio equipment is the key element that affects the performance of the sound hole amplifier, the winding of the toroidal transformer is not wound on both sides, but the inner and outer stacking, the core of Qingmo is made of high magnetic flux grain orientation cold-rolled silicon steel strip winding, such a winding process and the core magnetic circuit make its magnetic flux density high, magnetic flux leakage is small, internal resistance is small, and the efficiency is high.

I have a pair of such speakers, and then when I choose the amplifier, what size should I use? 300 or 600

600's. It is more appropriate to choose a 600 or 300+300 ring cow.

One 600 is the most suitable.

Isn't it more stable to have two 300 ring bulls.

The two 300 are not as good as the 600 directly because of the adaptation problem, and it is more stable to choose 600.

What do you want to ask?

It is a finished machine, which is equipped with two 300 rings of independent cattle, there should be no matching problem, such a machine is not more reasonable than only using a 600 book banquet ring.

Whether you have this machine with the manufacturer or buy a personal one, it's just that 600 is better.