Solar container power supply aging test steps

How do electronic loads facilitate power supply testing?

Electronic loads can facilitate power supply testing in several ways. They are typically pro-grammable, although most require external DAC program-mers. This capability enables finer control over loading values during testing, and can provide the test set operator with valu-able status information.

When should a power supply be tested under steady-state operation?

The efficiency and power fac-tor of the power supply under test should be measured under steady-state operation after the unit has been allowed to warm up. The electronic load can be operated in CC mode (for CV power supplies) and CV mode for (CC power supplies).

How to characterize the start-up sequence of a power sup-ply?

To fully characterize the start-up sequence of the power sup-ply under test, measurements must be made of the output voltage response to the instan-taneous application of the ac input (see Figure 11). A digital oscilloscope should be used so that storage of the output values can be accomplished for the measured start-up time period.

How many load settings should be used in a power supply test?

At least two load settings should be used, one of them being the maximum rated load for the power supply under test (see Figure 9 for test configuration). Some power supplies vary sub-stantially in efficiency and power factor as a function of loading.

What is a power supply voltage test?

The list below contains a brief description of some of these tests. This test involves the measure-ment of the periodic and random deviation of a power supply’s output current or voltage (typically over 8 hours), typically covering a bandwidth from dc to 20 Hz. The electronic load used for this test should be able to operate in CC or CV mode.

What should a constant voltage DC power supply measure?

In general, the measure-ment capability of the instru-ments should ensure an error no greater than 10% of the measured specification. A constant voltage dc power supply is designed with a feed-back loop which continuously acts to maintain the output voltage at a steady-state level.