Transformer with bobbin for preventing crack, low voltage dc-dc converter having the same, and method for assembling the same

Abstract

A transformer with a bobbin for preventing a crack may include a lower core configured to be provided with a lower assembling jaw, a bobbin for preventing a crack configured to have a center rib which is provided with a lower core crack preventing part inserted into the lower assembling jaw and an upper core crack preventing part formed at an opposite side to the lower core crack preventing part, having a predetermined thickness, a bus bar configured to penetrate through the center rib, an insulating plate configured to be stacked on an upper end surface of the bus bar, and an upper core inserted into the insulating plate and the bus bar and inserted into the upper core crack preventing part.

Description

technical field [0001] The present invention relates to a transformer, and more particularly to a transformer with a bobbin for preventing insulation and cracks and a low-voltage direct-current converter suitable therefor. [0002] In addition, the assembly method according to the present invention reduces the number of steps during assembly or reprocessing. Background technique [0003] Hybrid vehicles driven by engines and electric motors and electric vehicles driven by electric motors only need high voltage and high current to drive electric motors, so HPCU (Hybrid Power Control Unit, Hybrid Power Control Unit) of the power control unit is required. HPCU is composed of power supply products such as LDC (LowVoltageDC-DCConverter, low-voltage DC-DC converter), inverter (Inverter), HCU (HybridControlUnit, hybrid power control unit). [0004] The LDC is composed of a power supply unit (not shown) and a control unit (not shown). The power supply unit is used to change the hig...

AI Technical Summary

Problems solved by technology

[0012] However, in the case of epoxy resin, its use temperature is low, and in the case of impregnation, it has a shape covered with a kind of silicon, so the heat dissipation of the busbar cannot be performed well.

Therefore, the internal temperature rises to melt the bobbin, or loses the function of the core to lose the function of the LDC, or its unevenness can electrically damage the target on the vehicle side

[0013] In addition, in the case of epoxy resin or impregnation, it takes more than 2 hours to harden at 100°C, which increases the cost of materials.

Especially in the case of dipping, not only the magnetic core but also the internal parts are fixed, so it is difficult to assemble the LDC assembly without gaps, and there is a problem that even the internal parts have to be discarded when defective products are produced.

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