Dual-voltage coil for photovoltaic transformer and winding method thereof

Abstract

The invention relates to a double-voltage coil for a photovoltaic transformer and a winding method of the double-voltage coil. An iron core of each phase coil is provided with low-voltage coils and a high-voltage coil from the inside to the outside; the low-voltage coils are two independent low-voltage windings and are arranged in the radial direction; the high-voltage coil is an independent coil; and the method comprises the following steps: installing a coil mold and laying insulating paper; welding a top row of copper bars of the first low-voltage winding and coating the top row of copper bars with copper foil for the upper part; welding a top row of copper bars of the second low-voltage winding and coating the top row of copper bars with the copper foil for the lower part of the second low-voltage winding; clamping the top row in the first low-voltage winding and the top row in the second low-voltage winding into grooves of the coil mold; starting a winding machine and simultaneously winding the copper foil for the upper part of the first low-voltage winding and the copper foil for the lower part of the second low-voltage winding; carrying out shearing, welding and coordinated transposition; welding the tail rows; and dismantling the mold. The hybrid winding technology for high-voltage and low-voltage coils is really achieved; the quantity of the coils is reduced by half; the structure is compact and simple; the electrical property of a product is improved; the work efficiency is also improved; the volume of the transformer is reduced; and the producing and manufacturing cost is reduced.

Description

technical field [0001] The invention relates to a manufacturing technology of a photovoltaic transformer, in particular to a dual-voltage coil for a photovoltaic transformer. Background technique [0002] With the increasingly prominent environmental problems, the concept of green development is the development direction of the global economy, so the solar photovoltaic industry is valued by the whole world. The national development outline proposes to vigorously develop strategic emerging industries such as energy conservation, environmental protection, and new energy. The new energy industry focuses on the development of solar thermal utilization. At present, my country has formed a complete solar photovoltaic industry chain. Solar energy is a clean, efficient and inexhaustible new energy source. In the west of my country, photovoltaic power generation is developing towards grid-connected power generation and combined power supply with buildings. Photovoltaic power generat...

AI Technical Summary

Problems solved by technology

[0005] In view of the long winding time of the photovoltaic power transformer coil in the prior art, the complex manufacturing process, and the shortage of air and magnetism in the outgoing line when the two low-voltage branches are operated independently, the technical problem to be solved by the present invention is to provide a new type of photovoltaic transformer with dual Voltage Coil Structure

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