In the basic wiring patterns for DC power supplies, two specific methods are generally employed, which may encounter some issues during the wiring process. The specific solutions are as follows.
1. Primary Wiring Techniques
(1) The connection length between the DC power line and the load line should be equal and as short as possible. The lengths of L1, L2, and L3 lines should be identical, with the wire being as short as feasible.
(2) If a DC power supply is connected to a long distribution power supply load, the distribution lines should be as short as possible to increase the length of the distribution power supply from the switch point to the load. If possible, use twisted pair (L4) at this stage.
The diameter of the L4 cable should be ensured to safely accommodate the total current of the three DC power sources. If the baseline oscillates, the output may be unstable. In this case, efforts should be made to try the countermeasures listed on the next page, either sequentially or as needed.
Strategy for Unstable Direct Current Output
(1) The negative or positive pole of the output is grounded
If the input terminal of the DUT for DC power is not grounded, it's fine to ground both the positive and negative poles. However, if the DUT is grounded, it must be grounded at the output end of the grounding system.
2) Connect the cable to the control output port
If the complete control terminal is negative, connect to the negative terminal; if the main control terminal is positive, connect to the positive terminal.
The aforementioned actions can eliminate almost all DC power failures caused by load wiring.
(3) Connect a large capacitor at the switching point
Note: It is not possible to connect to high-speed power.
