Inverter fan control method and device

Abstract

The invention discloses an inverter fan control method. Due to control over the rotating speed of a fan, the power of a current inverter and a temperature preset value of a cooled power device are integrated, when the inverter is at the first temperature preset value, the fan can obtain a first fan rotating speed instruction related to the real-time power. When the highest temperature of the cooled power device is larger than the second temperature preset value, a second temperature preset value is adopted as a target, and a second fan rotating speed instruction is formed through a temperature regulator so as to perform closed-ring control over the temperature of the cooled power device. After the first fan rotating speed instruction and the second fan rotating speed instruction are added, a fan rotating speed driving instruction is formed. The invention further provides a device corresponding to the fan control method. On the basis of the first fan rotating speed instruction, the phenomena that when the temperature of the power device does not reach the preset value during operation of the inverter, the fan cannot be started and the inverter is in the heated and baked state all the time can be avoided; on the basis of the second fan rotating speed instruction, the fan can overlay rotating speed increment generated by increase of the temperature on the basis of the first fan rotating speed, and the rotating speed can be automatically adjusted according to environmental temperature.

Description

technical field [0001] The invention belongs to the technical field of inverters, and in particular relates to a fan control method and device for inverters. Background technique [0002] Fan cooling is a cost-effective heat dissipation method often used in inverters. In order to reduce power consumption and noise of equipment, speed-adjustable fans can be used. Generally, a high fan speed will increase the air volume, but it will increase the power consumption and noise of the fan, and reduce the service life of the fan; a low fan speed will result in low air volume and high inverter temperature, which will reduce the overall life of the inverter. In addition, the temperature of the inverter is also affected by the ambient temperature. Under the same operating conditions of the inverter, as the ambient temperature increases, it is necessary to increase the fan speed to reduce the inverter temperature. When the running speed of the fan reaches the upper limit, it is necessa...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an inverter fan control method and device for the problems existing in the prior art, which combines the operating power of the inverter with the temperature of the device under test, effectively solving the traditional problem of the device under test. When the temperature does not reach the preset temperature value, the fan does not start, and at the same time, the loss of fan rotation can be reduced as much as possible

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