How to choose a good supply?(1)

In addition to the most basic voltage conversion function, the following aspects need to be considered when selecting and using supply:

1. Rated power

Generally, it is recommended that the actual applied power should be 30-80% of the rated power of the customized non-standard power supply customized module (factory supply (the detailed share is also related to other factors, which will be discussed later), In this power scale, the supply functions in all aspects are relatively abundant and reliable. Too light a load will lead to waste of resources, while too heavy a load will bring bad luck to temperature rise and reliability. All customized non-standard power supply customized module (factory supplies must be overloaded.

2. Packaging method

(DC/DC) converter
The DC/DC converter converts a fixed DC voltage into a variable DC voltage. This technology is widely used in the stepless speed change and control of trolleybuses, subway trains, and electric vehicles. Responsive performance, and at the same time receive the effect of saving power. Replacing the varistor with a DC chopper can save power by (20~30)%. The DC chopper can not only play the role of voltage regulation (switching power supply), but also can effectively suppress the harmonic current noise on the grid side.

There are many packaging methods of customized non-standard power supply customized module (factory supply, including those conforming to international standards and non-standard ones. For the products of the same company, the same power products have different packages, and the same package has different powers. So how to choose the packaging method? There are mainly three aspects: ① the volume should be as small as possible under certain power conditions, so as to give more space and more functions to other parts of the system; ② Try to select products that conform to international standard packaging. Due to good compatibility, it is not limited to one or two suppliers; ③ It shall be scalable to facilitate system capacity expansion and promotion. Select a package. Due to the improvement of the system's functional upgrading requirements for power supply power, the power module package remains unchanged, and the system circuit board planning does not need to be changed, which greatly simplifies the upgrading of products and saves time.