Selection principle of plane transformer

Selection principle of plane transformer

1. Select the corresponding type of power transformer plane transformer according to the output voltage
2. Determine the number of plane transformers connected in parallel according to the output current
3. Determine the transformation ratio and the number of turns of the primary coil according to the size of the power transformer of the input and output voltages.
The printed circuit board (printed circuitboard) transformer can eliminate the winding skeleton, can increase the heat dissipation area, can reduce the eddy current loss caused by skin effect and proximity effect at high frequency operation, and can increase the current density The density is up to 20A / mm, the power is large, and the process is simple. But with PCB, the window utilization rate is low, only 0.25 ~ 0.3, the window utilization rate of traditional transformer is 0.4, and its volume is also large. The PCB type transformer has a power of up to 20kW and a frequency of the order of megahertz. Using pulse planar technology, multi-layer PCB sandwiched between magnetic cores, a thin high-efficiency ferrite planar transformer with a small bottom area, a height of only 7.4mm, an operating frequency of 150 ~ 750kHz, and an operating temperature of -400 ~ 1300

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