An inverter cooling system

Abstract

The invention provides a frequency converter cooling system. An electric heater is added on the basis of the traditional frequency converter. A first temperature sensor and a second temperature sensor are respectively arranged at the inlet and outlet of the cold plate. The outlet port of the plate, the outlet port of the circulating pump is connected to the inlet of the electromagnetic three-way proportional regulating valve, the first outlet port of the electromagnetic three-way proportional regulating valve is connected to the electric heater in the inverter box, and the second outlet port is connected to the The heat sink, the outlet end of the electric heater and the outlet end of the heat sink are connected to the inlet end of the cold plate together; it also includes a PLC controller, and the input ends of the analog input module of the PLC controller are respectively connected to the first temperature sensor and the second temperature sensor. The temperature sensor, the output terminal of the PLC controller is controlled to connect the electromagnetic three-way proportional regulating valve and the cooling fan. The invention can effectively realize the dual functions of cooling and heating the cooling water, so that the application range of the frequency converter is wider.

Description

technical field [0001] The present application relates to the field of frequency converters, in particular to a cooling system for frequency converters. Background technique [0002] With the rapid development of power electronics technology, the application of frequency converters is becoming more and more extensive. The frequency converter will generate a lot of heat when it is working. In order to ensure the normal operation of the frequency converter, it is necessary to cool the frequency converter in real time. At present, water-cooling or air-cooling methods are often used to cool the inverter, but the cooling effect of these two cooling methods is not ideal, and the internal cooling fan is always working at full load, and the energy consumption is too large; at the same time, because the inverter Different working occasions and seasons, if the ambient temperature is lower than the normal operating temperature of the inverter, the inverter will not start normally. ...

AI Technical Summary

Problems solved by technology

However, due to the wide range of applications of frequency converters, in some alpine regions or areas with low winter temperatures, once the ambient temperature is lower than the normal operating temperature of the frequency converter, the frequency converter cannot start normally; to solve this problem, the current technology is only Heating the air around the frequency converter, and then exchanging heat between the air and the cooling liquid, so that the frequency converter reaches the starting temperature, but this method is not only slow, but also the heating is uneven, and it is difficult to achieve the desired effect

At present, in view of the problems that the inverter cannot start normally in the low temperature environment and the energy consumption of the inverter is large, no effective method has been proposed to solve these two problems at the same time

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