EB501-10 S2 横河总线接口模块

EB501-10 S2 横河总线接口模块

EB501-10 S2 横河总线接口模块

自然冷却

EB501自然冷却方式是开关电源早期的传统冷却方式，这种方式主要是依靠大的金属散热器来进行直接的热传导式散热。EB501换热量Q=KA△t(K换热系数，A换热面积，△t温度差)。当整流器输出功率增大时，其功率元件的温度会上升，△t温度差也增加，所以当整流器A换热面积足够时，其散热是没有时间滞后，功率元件的温差小，其热应力与热冲击小。

但这种方式的主要缺点就是散热片体积和重量大。EB501变压器的绕制为尽可能降低温升，防止温度的上升影响其工作性能，所以其材料选择的裕量较大，变压器的体积和重量也大。整流器的材料成本高，维护更换不方便。由于其对环境的洁净度要求不高，目前对于小容量通信电源，在些小型通信网还有部分应用，如电力、石油、广电、水利、国安等。

EB501-10 S2 横河总线接口模块

Natural cooling

EB501 natural cooling method is the traditional cooling method of the early switching power supply, which mainly relies on a large metal radiator for direct heat conduction heat dissipation. EB501 Heat transfer Q=KA△t(K heat transfer coefficient, A heat transfer area, △t temperature difference). When the output power of the rectifier increases, the temperature of the power component will rise, and the △t temperature difference will also increase, so when the heat exchange area of the rectifier A is sufficient, the heat dissipation is no time lag, the temperature difference of the power component is small, and the thermal stress and thermal shock are small.

However, the main disadvantage of this method is that the heat sink volume and weight are large. The winding of EB501 transformer is to reduce the temperature rise as much as possible and prevent the rise of temperature from affecting its working performance, so the material selection margin is large, and the volume and weight of the transformer are also large. The material cost of the rectifier is high, and the maintenance and replacement are not convenient. Because of its cleanliness requirements for the environment is not high, at present, for small-capacity communication power supplies, there are some applications in some small communication networks, such as electricity, oil, radio and television, water conservancy, national security and so on.