The development of The Times and the improvement of the quality of life, whether we are in life or work, the number of demand for power is more and more, the field is more and more extensive, the power of electrical appliances from tens of watts to tens of kilowatts or even hundreds of kilowatts.
High-frequency power supplies are everywhere in life, for example: My father likes to plant vegetables, last year, for a while, the weather is dry, for a long time no rain, the father can worry about bad, because of age, water pouring vegetables more difficult, just I met, I put the submersible pump in the home on the battery tricycle, plus an inverter power can be watered, here is the use of inverter power. The current technology, the palm power supply, can do a few kilowatts of power, is not very cow
Before talking about high frequency power supply, first explain a stupid question recently raised by a DIY friend: What is high frequency power supply, and what is our battery power supply?
In fact, we only use two kinds of electricity in life, one is direct current, the other is mains, direct current is the battery or battery inside the electricity, very pure, there is no frequency problem; Mains power is 50HZ/60HZ AC220V electricity, what is the high-frequency power supply?
The high-frequency power supply is for the need to increase the frequency to more than 1000hz (1KHZ), or more than 20KHZ, so why increase the frequency? We know that we do not consider the loss of the premise, the same cross-sectional area of the magnetic ring or iron core, can withstand greater power transmission, that is, to increase the frequency, we can not increase the volume of the case, greatly increase the power of the power supply.
To understand the above problem, we began to explain why high-frequency power engineers so favor amorphous magnetic ring, according to the formula (formula is the empirical value) power and the effective cross-sectional area of the magnetic ring, window area, frequency, current density, saturation magnetic induction intensity of these five parameters are proportional to the relationship, so we want to improve the power, the volume of the power supply can not be larger, we can only increase the frequency, However, after increasing the frequency, the best material ---- silicon steel sheet becomes full of shortcomings at the power frequency;
As the saying goes, the ugly daughter-in-law is afraid to see the in-laws, silicon steel, it is most afraid to increase the frequency, originally at the power frequency, silicon steel is cheap, high Bs, high power, but the loss rises rapidly after increasing the frequency, this damage is divided into two kinds, one of the loss of the core itself increased, that is, the hysteresis loss increased, and another even eddy current caused by eddy current loss. This damage increases, there will be two bad results, the first is the waste of electricity, because the electricity is wasted through heat during conversion, the second is the heat caused by other components or seals of the safety factor decline, resulting in safety risks.
It is because of these high-frequency shortcomings of silicon steel that amorphous is used, here the amorphous refers to the 1k107 material, amorphous magnetic ring can now achieve a loss of 20Khz /0.5T within 25w/kg, do a little better can be controlled within 18w/kg.
Using amorphous magnetic loops combined with the circuit he designed, the conversion rate of the entire power supply reached about 95%, and the remaining 5% of the loss was the sum of the loss of iron core loss, copper wire loss, MOS tube and other components, which was much higher than the peer standard.
Post time: 10-15-2024
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High-frequency power supplies are everywhere in life, for example: My father likes to plant vegetables, last year, for a while, the weather is dry, for a long time no rain, the father can worry about bad, because of age, water pouring vegetables more difficult, just I met, I put the submersible pump in the home on the battery tricycle, plus an inverter power can be watered, here is the use of inverter power. The current technology, the palm power supply, can do a few kilowatts of power, is not very cow
Before talking about high frequency power supply, first explain a stupid question recently raised by a DIY friend: What is high frequency power supply, and what is our battery power supply?
In fact, we only use two kinds of electricity in life, one is direct current, the other is mains, direct current is the battery or battery inside the electricity, very pure, there is no frequency problem; Mains power is 50HZ/60HZ AC220V electricity, what is the high-frequency power supply?
The high-frequency power supply is for the need to increase the frequency to more than 1000hz (1KHZ), or more than 20KHZ, so why increase the frequency? We know that we do not consider the loss of the premise, the same cross-sectional area of the magnetic ring or iron core, can withstand greater power transmission, that is, to increase the frequency, we can not increase the volume of the case, greatly increase the power of the power supply.
To understand the above problem, we began to explain why high-frequency power engineers so favor amorphous magnetic ring, according to the formula (formula is the empirical value) power and the effective cross-sectional area of the magnetic ring, window area, frequency, current density, saturation magnetic induction intensity of these five parameters are proportional to the relationship, so we want to improve the power, the volume of the power supply can not be larger, we can only increase the frequency, However, after increasing the frequency, the best material ---- silicon steel sheet becomes full of shortcomings at the power frequency;
As the saying goes, the ugly daughter-in-law is afraid to see the in-laws, silicon steel, it is most afraid to increase the frequency, originally at the power frequency, silicon steel is cheap, high Bs, high power, but the loss rises rapidly after increasing the frequency, this damage is divided into two kinds, one of the loss of the core itself increased, that is, the hysteresis loss increased, and another even eddy current caused by eddy current loss. This damage increases, there will be two bad results, the first is the waste of electricity, because the electricity is wasted through heat during conversion, the second is the heat caused by other components or seals of the safety factor decline, resulting in safety risks.
It is because of these high-frequency shortcomings of silicon steel that amorphous is used, here the amorphous refers to the 1k107 material, amorphous magnetic ring can now achieve a loss of 20Khz /0.5T within 25w/kg, do a little better can be controlled within 18w/kg.
Using amorphous magnetic loops combined with the circuit he designed, the conversion rate of the entire power supply reached about 95%, and the remaining 5% of the loss was the sum of the loss of iron core loss, copper wire loss, MOS tube and other components, which was much higher than the peer standard.
Post time: 10-15-2024