Functions and requirements of DC voltage stabilized power supply
With the rapid development of power electronics technology, DC power supply is widely used, its good or bad directly affects the performance of electrical equipment or control system, DC regulated power supply has the following basic functions and requirements.
1, the output voltage value can be arbitrarily set below the rated output voltage value and normal operation.
2, the output current value of the current stabilizer can be arbitrarily set below the rated output current value and normal operation.
3, for the output voltage value and current value have precise requirements of DC regulated power supply, generally use multi-turn potentiometer and voltage and current trimmer potentiometer, or direct digital input.
4, to have a perfect protection circuit. DC regulated power supply should not be damaged when the output short circuit and abnormal working condition occurs, and can work normally immediately after the elimination of abnormal conditions.
5, DC regulated power supply voltage regulator and current regulator state can be automatically converted and have the corresponding state indication.
6, for the output voltage and current values require accurate display and identification.
DC regulated power supply in the power supply technology occupies a very important position, the commonly used DC regulated power supply requires stable voltage, reliable operation, sufficient power.
The role of DC regulated power supply
Most of the electronic equipment each of the function of the machine power supply is through the unidirectional conductive components will be converted to DC, and with energy storage components composed of a variety of filtering circuits to filter out the pulsating components in the DC, but these functions still can not meet the requirements of some electronic equipment on the DC regulated power supply, which will have an adverse effect on the work of the electronic equipment, the impact of its impact has the following aspects:
1, the impact of the input voltage range, when the input voltage is too high, it will make some components of the added voltage is too high or consume too much power and damage, when the input voltage is too low, but also will make some components of the performance degradation, and even can not work.
2, the impact of voltage instability, for example, the oscilloscope power supply must be stable to ensure that the light point of the deflection sensitivity, scanning time and other accurate; and, for example, the digital voltmeter requires an extremely accurate internal stable power supply to ensure that the voltage / digital conversion accuracy.
3, the impact of over-voltage output, for example, DC regulated power supply output voltage beyond the rated voltage of the integrated circuit of more than 30%, may cause extensive damage to the integrated circuit.
4, the impact of a brief power outage, for example, municipal communications can not be instantaneous blackout, otherwise the global communications interruptions, resulting in major accidents.
Stories; another example, computers and other AC power supply, AC uninterruptible power supply should be used.
This shows how important the role of DC regulated power supply in electronic equipment, can completely eliminate these effects, the working process of electronic equipment plays a very large maintenance role.
