DC power supply can be divided into large, medium and small power adjustable DC stabilized current power supply, multi-channel DC stabilized current power supply, linear power supply, variable frequency power supply, high power DC power supply (0-1000V 0-1000A, power 300W-500KW) It is one of them.

        1. There are two cases of voltage but no current or current but no voltage. It should be checked whether the power supply load is in good contact, whether the load is short-circuited or open circuited, and whether the load meets the specifications;

        2, when adjusting the voltage, the no-load voltage can not be adjusted. The reason is because the power supply consumes a little bit of current even if it is at no load, and you turn "current regulation" to zero, even a little bit of current is not put. Come out, of course, the no-load voltage can not rise, so "current regulation" is generally not adjusted to zero.

        3, DC power supply has voltage output, there is also current output, and then adjust the voltage, the voltage can not be adjusted, etc. This may be caused by the operator's "constant pressure", "constant current" concept is not clear Just give a simple case. If the "constant current" light is on, it means that the power supply works in a constant current state. At this time, the output voltage is not "tuned", but is determined by the load. Only by adjusting the "current adjustment" knob, the output current will change and the output voltage will change accordingly;

         The technical specifications of high-power DC power supply can be divided into two categories: one is the characteristic index, which reflects the inherent characteristics of the DC stabilized power supply, such as the input voltage, output voltage, output current, and output voltage adjustment range; the other is the quality index. Reflects the advantages and disadvantages of DC stabilized power supply, including stability, equivalent internal resistance (output resistance), ripple voltage and temperature coefficient.