Frequency converter

Abstract

A frequency converter disclosed by the present invention comprises a cabinet, the front surface of the cabinet is fixedly provided with a front cover plate, the front cover plate is composed of a terminal cover plate and an upper cover plate, the front surface of the upper cover plate is fixedly provided with a controller, and the lower position between the two sides of the inner wall of a magnet vane is fixedly provided with an aluminum profile partition plate. A plurality of heat dissipation grooves are formed in the bottom of the aluminum profile partition plate at equal intervals. According to the frequency converter, a first vertical electromagnetic shielding structure, a transverse electromagnetic shielding structure and a second vertical electromagnetic shielding structure can be independently installed, after installation is completed, the first vertical electromagnetic shielding structure, the transverse electromagnetic shielding structure and the second vertical electromagnetic shielding structure can be in a series connection power-on state, and when one of the structures is damaged, only the damaged part needs to be replaced without completely disassembling and replacing, so that the maintenance cost is reduced, and the waste of resources is favorably avoided.

Description

Technical field [0001] The present invention relates to a field of inverters, and is specifically a frequency converter. Background technique [0002] The inverter is a power control device for using frequency conversion techniques and microelectronic technology to control AC motor by changing motor operating power frequency. [0003] The inverter is mainly composed of rectifier (AC variable DC), filtering, inverter (DC change), brake unit, drive unit, detecting unit microcessing unit, and the like. The inverter adjusts the voltage and frequency of the output power supply by the interior of the internal IGBT. According to the actual needs of the motor, the power supply voltage thereof is provided, which in turn achieves energy saving, speed control, and many of the inverter there are many protection functions. Such as overcurrent, overvoltage, overload protection, etc. As industrial automation is increasing, the inverter has also been very widely used. [0004] The environment wh...

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Problems solved by technology

[0004] The environment in which the inverter is installed is different. It may be installed in a high temperature environment, a low temperature environment, a humid environment, or an environment with high electromagnetic waves. At this time, if the inverter does not have excellent anti-electromagnetic interference, the frequency conversion The normal operation of the device is easily affected and disturbed. The service life of the electromagnetic coil is affected by various environments. The existing multiple electromagnetic coils are connected together in series. The lines connected in series need to be unified and better, and the existing voltage The wire method is easy to cause damage to the wire end and poor contact

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