Transformer winding process

Abstract

The invention relates to a winding process for a coil of a transformer, in particular to a winding process capable of solving problem that a chip is easy to burn down when short circuit occurs in a transformer. To solve the technical problem, the invention adopts a technical proposal that: a transformer winding process comprises a winding framework on which a primary winding and a secondary winding are wound; and an auxiliary power supply for supplying power to the chip is assembled on an outmost layer to solve a problem that a charger is burnt down due to short circuit. The process has the advantages that: the auxiliary power supply for supplying power to the chip is assembled on an outmost layer, so the magnetic permeability of the winding is the lowest, and the voltage reduces the most rapidly when short circuit occurs in an output end to allow the voltage of the chip to reduce to a value less than a threshold value to prevent the charger from being burnt down; and a shielding layer is arranged between the primary winding and the secondary winding to suppress the noises generated by the transformer.

Description

technical field [0001] The invention relates to a winding process of a transformer coil, in particular to a winding process capable of preventing the chip from being easily burned when a short circuit occurs in the transformer. Background technique [0002] At present, in the electric bicycle charger market, there are many varieties and uneven quality. In order to gain a firm foothold in the fierce market competition, most manufacturers use single-ended flyback circuits. Although the circuits used by each manufacturer are different, However, the short-circuit protection basically relies on the source (or emitter) sampling resistor of the MOSFET to control the PWM chip. The winding structure is generally: a primary winding is wound on the skeleton, and then an auxiliary power winding is wound on the primary winding. , and then wind several layers of windings on the auxiliary power winding, so that the auxiliary power winding that supplies power to the chip is placed in the in...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the problem in the prior art that the power supply voltage of the chip cannot drop below the threshold voltage quickly when the output terminal of the transformer is short-circuited, and the charger is burned due to the short-circuit, and provides a method to prevent the chip from being damaged due to the short-circuit. Burnt out, low noise transformer winding process

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