High-impedance transformer coil winding device and method

Abstract

The invention discloses a high-impedance transformer coil winding device and method which are used for winding coils of a secondary iron core and a main iron core of a high-impedance transformer. The device comprises two clamping plates which are oppositely arranged in parallel, two first stop blocks which are oppositely arranged between the two clamping plates in parallel and a second stop block which is parallel to the first stop block and is arranged between the two clamping plates; the clamping plates serve as a support framework of the coil winding device and are used for limiting the displacement of core columns of the secondary iron core and the main iron core in the width direction of laminations; a space used for fixing the core column of the main iron core is formed between the first stop blocks and used for limiting the displacement of the core column of the main iron core in the thickness direction of the laminations; a space used for fixing the core column of the secondary iron core is formed between one first stop block and the second stop block and used for limiting the displacement of the core column of the secondary iron core in the thickness direction of the laminations. According to the high-impedance transformer coil winding device and method, it can be guaranteed that the offset of the core column of the secondary iron core does not occur when the high-impedance transformer coil is wound, and therefore the technical problems of waveform distortion, transformer stray losses and noise increasing which are caused by the offset of the core column of the secondary iron core are solved.

Description

technical field [0001] The invention relates to a coil winding device and method, in particular to a coil winding device and method applied to high impedance transformers. Background technique [0002] High-impedance transformers are mainly used in photovoltaic inverter systems. figure 1 The photovoltaic inverter system shown includes: LC filter 101, three-phase transformer 102, DC circuit breaker 103, DC EMC filter 104, three-phase full-bridge IGBT main power circuit 105, AC main contactor 106, AC EMC filter 107, AC circuit breaker 108 and AC lightning protection device 109. In a typical circuit of a photovoltaic inverter system, the three-phase power output from the three-phase full-bridge IGBT main power circuit 105 is rich in harmonics and cannot be used directly. It needs to pass through an LC filter (a filter composed of a reactor and a capacitor, In the figure, the capacitor) 101 is omitted for filtering, and at the same time, the small and medium power photovoltaic...

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Problems solved by technology

[0007] In view of this, the object of the present invention is to provide a high-impedance transformer coil winding device and method, which can ensure that the secondary iron core pole does not shift when the high-impedance transformer coil is wound, thereby solving the problem caused by the secondary iron core pole offset. Waveform changes, transformer stray loss and technical problems of noise increase

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