Novel high power magnetic integrated components and preparation method thereof
A high-power, magnetic integration technology, applied to electrical components, output power conversion devices, transformer/inductor cores, etc., can solve the problems of increased winding loss and high electromagnetic interference, and achieve low distributed capacitance and low Effect of electromagnetic interference and low additional loss
Inactive Publication Date: 2010-04-07
CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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Problems solved by technology
Due to the large air gap inductance and air core coil will bring additional winding loss and high electromagnetic interference
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[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] Principle of the present invention:
[0025] We know that according to the resonant frequency and the power of the power supply, using the Ap method is Select magnetic cores for magnetic integrated devices that meet power requirements such as figure 1 ;
[0026] According to formula The number of primary turns of the high-frequency transformer N 1 ;according to figure 2 The transformer leakage inductance formula can be deduced as From the leakage inductance formula, we know that the transformer leakage inductance is not only determined by the number of primary turns of the transformer, but also mainly determined by the structural size of the transformer. Reasonable adjustment of the transformer winding form and structural size (here the integrated magnetic part mainly changes σ 12 with h w ) can get the required reso...
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The invention relates to a novel high power magnetic integrated component and a preparation method thereof. The method comprises the following steps of: firstly, determining a magnetic core by utilizing an Ap method according to the power and frequency of a power supply; secondly, calculating the number of primary turns of the high power magnetic integrated component according to the primary voltage formula; thirdly, making a primary winding frame by using insulating materials; fourthly, winding number of turns obtained on the primary winding frame to form a primary coil; fifthly, making a secondary winding frame by using the insulating materials, and according to required resonance inductance amount and a transformer leakage inductance formula, realizing leakage inductance meeting the requirements of resonance inductance mainly by adjusting the primary and secondary winding space sigma 12 and primary and secondary average height hw in the method; sixthly, calculating number of turns of the secondary of a high frequency transformer according to the secondary voltage formula; seventhly, winding the calculated secondary number of turns on a secondary winding frame to form a secondary coil; and eighthly, assembling the primary coil and the secondary coil on the magnetic core obtained in the first step to form the high power magnetic integrated component.
Description
technical field [0001] The invention relates to a novel high-power magnetic integrated component and a preparation method thereof, which are suitable for high-power power supplies, modulator power supplies, and radar transmitter power supplies. Background technique [0002] The resonant inductor is an indispensable component in the soft-switching series resonant power supply, but the resonant inductance in the high-power power supply is usually small and the voltage across the inductor is high, which brings certain difficulties to the design. Usually, to meet the small inductance, it is desirable to have fewer turns, and fewer turns cannot meet the high voltage requirements at both ends of the inductor. Therefore, this type of resonant inductor usually achieves the small inductance requirement by increasing the air gap under the premise of first meeting the voltage, or uses an air-core coil as the resonant inductor. Due to the inductance of the larger air gap and the air-co...
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Inventor 沈坚
Owner CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST