What is the load effect of DC power supply? How to reduce the effect?
There are only two types of power sources in everyday life: direct current and alternating current, and a direct current power source is a device that keeps the voltage in a circuit stable and constant. So how much do you know about the impact of DC power load effects?
1. Principle of load effect of DC power supply
The power output is stable. When the DC power supply is in a constant voltage state, the output voltage changes according to the change of the input voltage. The same is true for the constant current state, and the output current varies according to the current. Therefore, the concept of loading effect can be used to measure this change.
If a resistive load is connected to the output terminal of the power supply, the output voltage of the DC power supply will drop, the change in the output voltage proves to be a load effect, and depending on the connected power supply, its magnitude will be adjusted accordingly.
Generally, there are two phenomena of loading effects. On the one hand, where the device is connected or even the entire device changes. The second is to form a new whole. Although the properties of the original device are preserved, the function cannot be expressed in the serial-parallel expression of the source device.
2. How to reduce the load effect?
(1) Place the high input and low output amplifiers where they are connected first. This reduces the energy absorbed by the previous connection, withstands changes in voltage output, and reduces the effect of the overall load.
(2) Increase the output impedance of subsequent connection links.
(3) According to the principle of feedback or zero point measurement, the following links do not absorb any energy.
