Influence of DC power supply load effect
There are only two types of power supplies in daily life: direct current and alternating current, and a direct current power supply 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. The principle of load effect of DC power supply
The output of the power supply 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 change in current. Therefore, the concept of loading effect can be used to measure this change.
If a resistive load is connected to the output terminals of the power supply, the output voltage of the DC power supply will drop, and the change in output voltage proves to be a load effect, and depending on the power supply connected, it will be sized accordingly.
Generally, the loading effect has two phenomena. On the one hand, the connection points of the equipment and even the entire equipment can be changed. The second is to form a new whole, although the properties of the original device are preserved, but this 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 were connected first. This reduces the energy absorbed by previous connections, withstands changes in voltage output, and reduces the overall load effect.
(2) Increase the output impedance of the subsequent connection link.
(3) According to the principle of feedback or zero point measurement, the following links will not absorb any energy.
