Novel frequency converter

Abstract

The invention relates to the field of frequency converters, in particular to a novel frequency converter. The frequency converter comprises a frequency converter housing, a frequency converter controlboard, a heat sink, an air cooler and a fan disposed above the air cooler. The rear surface of the frequency converter housing is provided with an opening, and the heat sink is disposed at the opening. A high heat generating region of the frequency converter control board is in close contact with the heat sink, and the frequency converter housing is provided with an opening, and then a heat dissipation device is disposed at the opening. Moreover, the high heat generating area of the frequency converter control board in the frequency converter are fixed on the heat dissipation device, and theheat dissipation device is directly and fixedly fixed n a conventional liquid pipe, thereby achieving water cooling or oil cooling. Moreover, the wiring problem of the liquid pipe is not required tobe considered, thereby enabling the structure of the frequency converter to be simple, enabling the installation to be convenient and enabling the heat dissipation effect to be very good. In addition,the arrangement of a water pipe or an oil pipe does not need to be changed. More preferably, the heat dissipation device uses the air cooler and the fan to dissipate heat, thereby enabling the heat dissipation rate of the heat dissipation device to be greatly improved.

Description

technical field [0001] The invention relates to the field of frequency converters, in particular to a novel frequency converter. Background technique [0002] Inverter (Variable-frequency Drive, VFD) is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's operating power supply. The inverter is mainly composed of rectification (AC to DC), filtering, inverter (DC to AC), braking unit, drive unit, detection unit and micro-processing unit. The frequency converter adjusts the voltage and frequency of the output power supply by switching off the internal IGBT, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation. In addition, the frequency converter has many protection functions , such as overcurrent, overvoltage, overload protection, etc. With the continuous improvemen...

AI Technical Summary

Problems solved by technology

[0003] The operating environment temperature requirement of the high-voltage inverter is usually 0°C to 40°C. Since the inverter will dissipate heat during operation, it is easy to cause the operating environment temperature of the inverter to be too high and cause the inverter to trip due to overheating protection.

Especially in the hot summer, due to the high ambient temperature and the heat generated during the operation of the inverter itself, overheating protection and tripping often occur. In severe cases, it may not even work normally, which seriously affects the normal production.

Because it is easy to generate a lot of heat during use, it needs to dissipate heat to protect the normal operation of the machine. At present, the heat dissipation of the frequency converter relies on air cooling or self cooling, and the air cooling heat dissipation structure is a commonly used heat dissipation method, but Because this heat dissipation structure is affected by the air circulation speed, the heat dissipation effect is often not very ideal, especially in the inverter module, because there are many electronic components, it is easy to generate high temperature during use. If the heat dissipation effect is not good, it is easy to cause electronic Component damage and other faults; the same self-cooling heat dissipation method is generally used in low-power products. Often with the increase of the power and load of the inverter, the self-cooling heat dissipation method is very unsatisfactory, that is, through the above two cooling methods The design is not ideal, it is easy to cause poor heat dissipation effect and affect the performance of the whole machine

[0004] At present, most of the frequency converters that use water-cooling heat dissipation adopt a water-cooling circulation device inside the frequency converter. By setting a circulating water pipe inside the frequency converter, it is also necessary to set a pipe connected to the circulating water pipe outside, which will cause problems during use or installation. Limited by the site or re-laying water pipes, its use and installation will be more troublesome

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