High-power non-partial-discharge variable-frequency power supply pipeline air cooling device

Abstract

The invention discloses a high-power non-partial-discharge variable-frequency power supply pipeline air cooling device, which comprises a high-power non-partial-discharge variable-frequency power supply, an air pipe and a centrifugal fan, wherein the high-power non-partial-discharge variable-frequency power supply is arranged indoors, the centrifugal fan is arranged outdoors, the air pipe is arranged between the high-power non-partial-discharge variable-frequency power supply and the centrifugal fan and penetrates through a wall, and the power of the centrifugal fan is higher than 1000 watts. In the high-power non-partial-discharge variable-frequency power supply pipeline air cooling device provided by the invention, the centrifugal fan is arranged outdoors, and the air pipe penetrates through the wall, so that most noise of the centrifugal fan can be isolated by the wall; and simultaneously the power of the centrifugal fan is higher than 1000 watts, so that the temperature of the high-power non-partial-discharge variable-frequency power supply can be rapidly reduced so as to guarantee normal running of equipment.

Description

technical field [0001] The invention relates to an air-cooling device, in particular to a high-power non-partial discharge variable-frequency power pipe air-cooling device, which belongs to the technical field of high-voltage electrics. Background technique [0002] 100kW-500kW active power output non-partial discharge variable frequency power supply requires its own interference noise to be around 10pC (partial discharge volume), so a transistor linear power amplifier circuit must be used. Usually, thousands of transistors share the work of the four bridge arms (for example, a 300kW variable frequency power supply needs to use about 5,000 250W transistors). The efficiency of the transistor in the linear working area is low, about 70%, that is, there is about 30% of the electric energy (tens to hundreds of kilowatts will be consumed in the heat of the transistor), so the frequency conversion power supply usually uses a larger power The fan is used to cool and dissipate the ...

AI Technical Summary

Problems solved by technology

The efficiency of the transistor in the linear working area is low, about 70%, that is, there is about 30% of the electric energy (tens to hundreds of kilowatts will be consumed in the heat of the transistor), so the frequency conversion power supply usually uses a larger power The fan is used to cool and dissipate it, so the problem is that the noise is loud, especially when the equipment is used indoors, it will increase the indoor temperature. First, it will directly affect the cooling effect, and second, it will make the working environment of the operators harsh.

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