A medium voltage rectifier

Abstract

The invention relates to a medium-voltage rectifying device. The medium-voltage rectifying device is characterized in that each uncontrollable rectifying unit is composed of three independent bridge arms, wherein each bridge arm is composed of three heat radiators and two rectifier diodes, and is of a structure of interlaying one rectifier diode between every two heat radiators in a press mounting manner through screw rods; each bridge arm is insulated, and is fixed on a bottom plate; the accurate positioning of the rectifier diodes and the heat radiators is ensured through positioning pins between the rectifier diodes and the heat radiators; the wiring terminal of each of a lower heat radiator and an upper heat radiator is provided with a fuse link; a rectifier diode protection circuit is formed by connecting the fuse links with the rectifier diodes in series; the installation direction of the wiring terminal of a middle heat radiator is opposite to that of the wiring terminal of each of the lower heat radiator and the upper heat radiator; the middle heat radiator is provided with a high-voltage-resistant contact temperature measurement element; the rectifier diodes and the heat radiators in each bridge arm are electrically isolated by utilization of four insulated screw rods through an upper insulating plate and a lower insulating plate, are vertically clamped through a reinforcing plate and the bottom plate, and are fixed by means of locking the screw rods through nuts. According to the medium-voltage rectifying device, the problems of complexity in wiring, large size, difficulty in installation, incapability of flexible combination and inapplicability for vibration and impact occasions in the existing medium / large-power rectifying device are solved.

Description

technical field [0001] The invention relates to a power electronic device, in particular to a medium-voltage rectifying device. Background technique [0002] The existing medium and high-power rectifiers in China basically adopt modular structure design, that is, most of them are composed of a rectifier tube and two radiators by clamping bolts with insulation requirements to form a small module, and then several small The modules are insulated from each other and arranged in a certain way to form a rectifier and installed in the cabinet. Since each small module of the rectifier has two terminals, and each module needs to be insulated from each other, the wiring of the internal circuit of the rectifier is complicated, the connection of copper bars and radiators increases, the appearance is bulky, the installation is difficult, and it cannot Flexible combination, etc., especially in the case of medium, high pressure and heavy load. [0003] In applications with vibration and...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems that the medium-voltage rectification device has complex structure, large volume, difficult installation, and is not suitable for occasions with vibration and impact, and proposes a medium-voltage rectification device, which has simple wiring and installation, compact structure, convenient disassembly and replacement, and flexible combination , A new type of medium voltage rectification device suitable for vibration and shock occasions, which uses the least heat sink to solve the problem of complex wiring, bulky, difficult installation and manufacturing of existing medium and high power rectifier devices, inability to flexibly combine, and not suitable for vibration and shock difficult occasions, and at the same time easy to integrate with special rectifier generators

Images