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Use the inverter's own contacts to achieve ventilation and heat dissipation in the cabinet

Use the inverter's own contacts to achieve ventilation and heat dissipation in the cabinet

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2019-10-17
  • Views:3

(Summary description)As we all know, when the inverter is installed in the control cabinet, its fault will increase with the temperature of the differential inverter itself and the temperature inside the cabinet, and the service life of the inverter will decrease with the temperature.

Use the inverter's own contacts to achieve ventilation and heat dissipation in the cabinet

(Summary description)As we all know, when the inverter is installed in the control cabinet, its fault will increase with the temperature of the differential inverter itself and the temperature inside the cabinet, and the service life of the inverter will decrease with the temperature.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2019-10-17
  • Views:3
Information

As we all know, when the inverter is installed in the control cabinet, its fault will increase with the temperature of the differential inverter itself and the temperature inside the cabinet, and the service life of the inverter will decrease with the temperature.

Due to the use of dust and other substances in the environment, these substances will cause the filter screen to be blocked when entering the inverter cabinet, and the heat dissipation of the inverter will be reduced if the heat dissipation is not good, and the life of the power components will be shortened.

变频器 The heat generated by the inverter is caused by internal losses. In the inverter, the main loss is mainly the main circuit, which accounts for about 98%, and the control circuit only accounts for 2%. In order to ensure the normal and reliable operation of the inverter, the inverter must be dissipated. We usually use a fan to dissipate the heat. The built-in fan of the inverter can take away the internal heat dissipation of the inverter's cabinet. If the fan cannot work normally, stop the inverter immediately; When designing the inverter cabinet, you need to select the matching fan according to the ventilation required for the heat generated by the inverter and the components in the cabinet during operation. The fan installation must pay attention to the problem of anti-vibration.

Because the large-capacity inverter has a large amount of heat, if the heat generated is not discharged in time, it will cause greater damage to the components in the cabinet. Now, many designers basically turn on the cooling fan in the cabinet at the same time when the inverter is started when the secondary control loop is designed. When the inverter is stopped, the cooling fan is also stopped at the same time. In this way, the heat in the cabinet is not able to Completely exhausted, so that heat is collected in the cabinet, and it can only be naturally dissipated by the heat dissipation holes in the cabinet. This will be due to the different ventilation design of different cabinets, which will cause the heat dissipation time in the cabinet to accumulate for a long time. Damage to electronic components.

提供 Here are two options for reference:

Solution 1: Install a temperature and humidity controller in the cabinet to automatically adjust the temperature and humidity in the cabinet, and control the cooling fans and heaters installed in the cabinet through the temperature and humidity controller.

Solution 2: We can use the relay contacts that come with the inverter for control. Taking ABB inverter as an example, the inverter provides three groups of relay output contacts, and these three groups of contacts can be set flexibly.

The cooling fan is controlled by one set of contacts. When the inverter is started, the cooling fan is started at the same time. When the inverter is stopped, the setting of the contacts inside the inverter will delay the cooling fan to delay, so that the heat in the cabinet can be fully When it is discharged, the specific delayed off time can be set in combination with the heat dissipation of the fan.

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