A heat pipe type wind power converter power unit

Abstract

The invention discloses a wind power converter power unit. The heat tube type wind power converter power unit comprises an inverter bridge constructed by a power switch IGBT (insulated gate bipolar transistor) and a control protection circuit of the inverter bridge, wherein the inverter bridge is provided with a direct current input busbar, an alternating-current output lead and a heat radiator; the heat radiator comprises a substrate, fins and a heat tube, a groove is formed in the upper surface of the substrate, the heat tube is buried in the groove, the heat tube is arranged corresponding to the position of a heating element, and the fins are vertical to the substrate and are distributed under the substrate at intervals; the heat tube is a hollow and closed copper tube, and low-boiling-point condensate is filled in the heat tube. According to the power converter power unit for a wind power generator, the inversion reliability and safety are improved, the shape and spatial position layout of parts are more reasonable, the heat radiation effect is good, the stray inductance is small, the power characteristic of the IGBT is given into play more sufficiently, and the inversion efficiency is improved.

Description

technical field [0001] The invention relates to the field of wind power converter control systems, in particular to a heat pipe type wind power converter power unit, an important component for realizing the inverter process of the converter. Background technique [0002] With the continuous improvement of the power level of wind power generation, from tens of kilowatts of converters to several megawatts of converters, the heat dissipation method of the power unit has gradually evolved from the initial air cooling to the liquid cooling heat dissipation mode. The heat exchange efficiency of the liquid cooling device is very high, but the cost is relatively high. How to make the heat dissipation of the IGBT as efficient as possible under the premise of air cooling has become a bottleneck restricting the power level of the converter. [0003] The core component of the power unit is the IGBT, and its calorific value gradually increases with the increase of the power level. Due t...

AI Technical Summary

Problems solved by technology

[0005] 1. High cost

Many machine manufacturers use imported power units without independent intellectual property rights, resulting in high production costs

[0006] 2. Low cooling efficiency

The heat dissipation of the IGBT determines the efficiency of the power unit. Due to the structure and heat sink of many domestic manufacturers, the power unit cannot give full play to the effect of heat dissipation, resulting in low efficiency of the power unit.

[0007] 3. The circuit design is not perfect

Good circuit principle design and board layout technology are also very important means to reliably operate and protect the power unit. There are still many shortcomings in the circuit boards designed by some domestic manufacturers.

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