DC power supply, DC regulated power output skill index:
1, the extra output voltage of the DC power supply: the nominal value of the DC voltage at the output end. The rules of the nominal voltage have precision and ripple coefficient, etc.
2, the additional output current of the DC power supply: the maximum uniform current of the output supply to supply the load. According to the difference of electronic equipment, the output current of one way is increased and the output current of the other path will be reduced to keep the total output current unchanged.
3, DC power supply voltage accuracy: the precision is also known as the precision of output voltage or voltage regulation rate, is when the power supply work conditions change, the percentage ratio and additional voltage value of the output voltage of DC power to change the sun Jake value. The accuracy of voltage regulation can reflect the function and quality of power supply. The accuracy of commonly used DC power supply is generally 1%, and its output voltage changes are mainly caused by the following reasons.
(1) changes caused by static input voltage. Under the additional conditions, the change of the output voltage of the DC power supply is caused by the slow change of the voltage in the regular scale.
(2) changes caused by static load. Under the additional conditions, the output current will change slowly when the output current varies slowly within the regular scale, and the output voltage of the DC power supply is changed. Under the condition of regular load changing scale and multi-channel output, DC power may have unstable output, so the highest load current is also included. The rule precision of the maximum load current is generally the condition when the maintenance function does not play a role. On the other, the power of multi output DC power supply circuit, sun Jake methods also influenced by other output load changes.
The change of dynamic transmission voltage caused by DC power supply. Under the additional conditions, the output voltage changes when the input voltage changes sharply with the sharp fluctuation of the rule. In general, the upper limit of the input voltage is fluctuated with the lower limit of the additional input power supply and the transmission voltage.
(4) the change caused by the dynamic load of the DC power supply. Under the additional conditions, the output voltage changes when the output current changes sharply according to the fluctuation of the rule. The changes caused by the dynamic load do not contain the changes caused by the stable pulse load.
4, the adjustable scale of the output voltage of the DC power supply: under the condition of guaranteeing the stability and precision of the voltage, the output voltage scale can be adjusted by the external adjustable. It is usually 5% or + 10%. The condition is that the output voltage is the maximum when the voltage is lower, and the output voltage is minimum when the transmission voltage is upper limit.
5, the scale of DC power output current changes: according to the structure of the device, the output current should be changed under general load when deciding the load current. If it is a shock load with large impulse current such as rational load, it is necessary to limit the scale of output current.
6, DC power ripple and noise: ripple is the weight of AC components at the output of DC regulated power supply. The peak value indicates that it is generally less than 0.5% of the output voltage. The noise is the output other than the ripple in the frequency of the weight, generally also use peak and peak value, generally the DC power output voltage of about 1%. When there is no clear distinction between the noise and the ripple, the total composition of the regular ripple and the noise is required. In most occasions, the total component value of the ripple and noise of the regular DC power supply is less than 2% of the output voltage.
7, the adjustment rate of DC power line: the ratio of the wavering scale of the input voltage to the shaken scale of the output voltage. With the development of the skills, the rate of line adjustment is increasing. The DC power supply is very important to the adaptability of the power grid.