Shenzhen Longxc Power Supply Co.,Ltd
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Tel：+86 0755-2778 4192
Fax：+86 0755-2999 1201
Address：B Building, Yingrenshi Community, ?Wentao Science Park, Shiyan Town, Bao'an, Shenzhen，China
Selection of High Frequency Magnetic Elements in LED Switching Power Supply
Source：http://brickdefender.comPublished time：2017-01-10 18:29:00Views：
It is an important goal for portable electronic devices (such as mobile phones, digital cameras, etc.) to make the power density of switching power supply small and light, so the specific method of miniaturization of switching power supply:
In order to achieve high power density, it is necessary to increase the operating frequency of the PWM converter, thus reducing the volume of the energy storage components in the circuit.
2, the application of piezoelectric transformers. Application of piezoelectric transformers can make high-frequency power converter to achieve light, small, thin and high power density.Piezoelectric transformer piezoelectric ceramic materials using the unique "voltage - vibration" transformation and "vibration - voltage "Transform the nature of the transmission energy, the equivalent circuit as a series-parallel resonant circuit, power conversion is one of the areas of research.
In order to reduce the size and weight of power electronic equipment, we should try to improve the performance of the capacitor to improve the energy density, and research and development for power electronics and power supply systems with new capacitors, requiring large capacity, equivalent Small series resistance (ESR), small size and so on.
LED switching power supply system using a large number of magnetic components, high-frequency magnetic components of the material, structure and performance are different from the power frequency magnetic components, there are many problems to be studied.For high-frequency magnetic components used in magnetic materials, requires its loss, heat Performance, magnetic superiority.For megahertz frequency of magnetic materials for people's attention, nano-crystalline soft magnetic materials have also been developed and applied.