Primary and secondary isolation type high frequency transformer
A high-frequency transformer and isolation technology, applied in the field of transformers, can solve the problems that hinder the development of high-frequency transformers with high frequency and high efficiency, large leakage inductance and stray capacitance, and restrict high-frequency characteristics, so as to achieve low cost and high current High density, good heat dissipation effect
Inactive Publication Date: 2010-07-14
张韶英
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Problems solved by technology
[0003] The existing high-frequency transformers have the disadvantages of large volume, large dielectric loss and high wire loss, large leakage inductance and stray capacitance, although the flat-panel transformer made of PCB board solves the shortcomings of large volume, large leakage inductance and large stray capacitance , but the PCB board dielectric and copper wire it uses still have serious defects such as large dielectric loss and high wire loss. The development requirements of frequency, high efficiency and small volume
Method used
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[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0011] see figure 1 and figure 2 , a primary-secondary isolated high-frequency transformer, including a skeleton, a magnetic core 4 is installed on the skeleton, a primary coil 1 is wound on the skeleton, a secondary coil is wound on the outer periphery of the magnetic core 4, the primary coil 1 and the secondary coil Insulating layers are installed at intervals, and the secondary coils have at least a first secondary coil 2, a second secondary coil 3 and a third secondary coil 5, and the second secondary coil 3 and the third secondary coil 5 are respectively wrapped On the outer circumference of the first secondary coil 2; the two ends of the second secondary coil 3 and the third secondary coil 5 are respectively connected to the two ends of the winding of the second secondary coil 3 and the third secondary coil 5 to be rectified and then connected t...
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The invention relates to a minitype first-class isolated type high frequency transformer with a efficiency of energy-saving and environmental protection, which comprises a frame, a magnetic core arranged on the frame, a primary coil winding on the frame, a secondary coil winding outside of the magnetic core, an insulation layer is interval arranged between the primary coil and the secondary coil.The secondary coil comprises at least a secondary coil group A and two secondary coil groups B; wherein the two secondary coil groups B are respectively winded around the secondary coil group A. Bothwire winding ends of the two secondary coil groups B are connected with a diode rectifier respectively and the joint is used as an output end. One wire winding end of the secondary coil A is connected with the wire winding central section of two secondary coil groups B and the other end is used as the other output end. The two output ends are connected with a capacitor in parallel. The invention has the advantages of uniform current distribution, high ampere density, high power density, high efficiency, low leakage inductance, good high frequency characteristics, good heat dispersion, simple structure, good isolation and low cost.
Description
【Technical field】 [0001] The invention relates to a transformer, in particular to a primary-secondary isolated high-frequency transformer with the characteristics of small size, good isolation, high density, high power, small leakage inductance and current sharing. 【Background technique】 [0002] A high-frequency transformer is a power supply that converts high voltage into low voltage. The miniature high-frequency transformer still uses the principle of electromagnetic induction to transmit electric energy between two circuits. Its basic structure is the same as that of a conventional transformer, consisting of a magnetic core and a winding. . At present, a general high-frequency transformer is composed of a primary coil (high-voltage part), a secondary coil (low-voltage part) and an auxiliary coil (low-voltage part of the primary line), and its general winding sequence is from the primary coil to the auxiliary coil and then to the secondary The coils are separated by insu...
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IPC IPC(8): H01F27/28H01F27/40
Inventor 张韶英
Owner 张韶英