防爆变频器水冷系统的设计

The Design of High-voltage Inverter Water Cooling System

提出了一种防爆变频器密闭式水冷系统的设计方法,恒定压力和流速的冷却介质源源不断流经换热器进行热交换,散热后再进入被冷却器件带走热量,温升水回至高压循环泵的进口。根据热负荷的变化,PLC根据供水温度的高低来控制进入换热器的冷却水流量,从而达到系统精确控制温度的要求。为适应大功率电力电子设备在高电压条件下的使用要求,防止在高电压环境下产生漏电流,在主循环回路上并联了去离子水处理回路。预设一定流量的冷却介质流经离子交换器,不断净化管路中可能析出的离子,然后与主循环回路冷却介质在主循环泵入口合流。

Design method of High-voltage Inverter Water Cooling System was proposed in the paper. Coolant with constant pressure and flow dissipates heat through the heat exchanger, exchanges heat with the heat exchanger, flows into the valves. Then it gets back to the inlet of the main circulation pump. With the change of heat load, PLC controls the ratio of the cooling water flowing through the heat exchanger according to the supply water temperature, so as to achieve the requirements of accurate temperature control. In order to meet requirements of high power electronic equipments in high voltage condition and prevent electricity leakage in high voltage environment, cooling medium must have very low conductivity. So the coolant treatment circuit is parallel connection with the main cooling circuit. Part of coolant flows through the ion exchanger, and constantly purifies ion in pipeline, then enters into the expansion tank. Finally the deionizing water confluents the coolant in main circuit at the inlet of main circulation pump.