Introduction of three traditional methods for high temperature cooling of DC power supply
Temperature is one of the most significant factors affecting the reliability of DC power supplies, and as high frequency and miniaturization of DC power supplies develop, their power density can be continuously improved. For these reasons, research on the current heating problem is becoming increasingly important.When a device's temperature exceeds its recommended working temperature, the reliability of the device decreases by half per 10°C change in temperature and the power supply's limit value is surpassed, resulting in damage and power loss to the device. A high power, density DC power supply requires effective, safe, and reliable cooling techniques in addition to low-power device selection and network topology optimization to limit heat created by the modules.
There are three traditional cooling techniques: forced air cooling, forced water cooling, and natural convection cooling. DC power supplies urgently require high cooling capacity, safety, and reliability due to the limited level of air cooling (natural convection, forced air cooling) cooling technology, as well as the current forced water cooling management systems' complex structures and low reliability. dependable cooling technique. Evaporative cooling technique uses the latent heat of vaporization to dissipate heat when heating a cooling medium with strong insulating qualities and a low boiling point, in contrast to air and water cooling, which depend on a cooling medium to do so.
Currently, complete immersion evaporative cooling is done via surface mount and cooling nozzles, whose construction depends on the heating element's thermal characteristics and the cooling device of choice. The huge quantity, dispersed distribution, uneven heating, and complex heat source geometry of a DC power source are its characteristics. When using full immersion evaporative cooling, the heater and power management module can both fully expand along with the coolant. It has a direct impact on the contact, a good heat dissipation effect, a straightforward system design structure, and high dependability. It is the preferred, architecturally distinct type of evaporative cooling technology that is largely driven by DC.
Researchers of 12V/2kW DC power supplies examine the thermal performance of DC power supplies from the angles of theoretical analysis, simulation modeling, and immersion cooling. Simulation and experiments confirm the validity of theoretical research and analysis, and can be used to cool DC power supplies. Technical advancements in totally submerged evaporative cooling systems are feasible and advantageous.
In addition to having a straightforward cooling construction, the DC power supply with fully immersed evaporative cooling also benefits from minimal steady-state temperature rise, uniform temperature distribution, no local overheating during dynamic processes, and low thermal load. Additionally, immersion evaporation has the benefit of allowing for more flexible equipment placement, a smaller power supply footprint, and higher power density without the need for unique channel designs to cool the DC power supply.
With fully immersed evaporative cooling, the temperature environment of the DC power supply's primary components changes slowly at startup; there is no sudden temperature overshoot during cooling, thermal stress from prolonged operation, or an increase in consumption. The dependability to satisfy the cooling requirements of a DC power supply and the safety of power management operation have high application prospects in the field of DC cooling.
