Performance, characteristics and application scope of DC operating power supply
The current allowable ambient temperature for DC operating power supply is -5 ℃ to+40 ℃. During the life test, if the ambient temperature changes, the coil resistance of the contactor will be affected, resulting in the excitation of the contactor's connection being affected. At low temperatures, the excitation will increase, thereby increasing the mechanical load on the electromagnetic system, and the magnitude of the impact is difficult to accurately predict. However, according to testing verification, conducting a lifespan test within this ambient temperature range will not have a significant impact on the test results, especially for contactors operated directly by DC. Changes in ambient temperature will not cause the lifespan test results to fall below the predetermined values.
The noise of the DC operating power supply is mainly generated during the AC charging process. With the development of science and technology, the noise of current DC operating power supplies has been reduced to 45 dB, which can provide a comfortable working environment for workers.
The ripple voltage of a DC operating power supply with 3 ripple voltage outputs should be less than 0 1%.
4 Input AC voltage variation range DC equipment input voltage is 380 V, 220 V, and 220 V input is usually used in factory testing. Regardless of the input voltage, the input voltage of the device will experience corresponding fluctuations due to power grid fluctuations. Generally, it is required that the input voltage fluctuation range of DC operated power supply equipment be within ± 10%. If the range is too small, when the power grid fluctuates greatly, it will cause DC equipment to lose voltage, resulting in internal component discharge, which is not conducive to the normal operation of other equipment. If the scope is too large, it will lead to an increase in production costs.
Although the output voltage of a DC power supply is DC, there may also be certain fluctuations in the range of 5 DC output voltage variations. The general output voltage fluctuation range is within ± 5% of the rated voltage output voltage range. If the range is too large, it will affect other equipment and seriously damage the equipment.
The determination of the power of the DC operating power supply is crucial in the entire equipment selection process. Typically, factories choose equipment with a power of 5 kW, which can basically meet the requirements of simultaneously driving multiple test samples for life testing.
