The difference between DC power supply and regulated power supply
Our work and life are inseparable from power supply, which can be divided into DC power supply and AC power supply. The DC power supply outputs direct current. Direct current refers to the current whose direction does not change with time. Note that the direction does not change. A regulated power supply is an electronic device that can provide stable alternating current or direct current to the load. So what is the difference between DC power supply and regulated power supply?
1. The role of DC power supply
Electronic circuits require DC power to provide energy when working. Batteries are generally only used in low-power portable instruments and equipment due to their high cost. Most electronic instruments, household appliances, and computers need to convert AC power into DC stabilized voltage. power supply.
2. Definition of DC power supply
Convert an AC voltage with a frequency of 50Hz and an effective value of 220V into a single-phase low-power DC regulated power supply with a voltage amplitude of several volts to dozens of volts and an output current of several amps or less.
3. The composition of DC power supply and the functions of each part
The DC power supply consists of four parts: a transformer, a rectifier circuit, a filter circuit, and a voltage stabilizing circuit. Its block diagram is shown in Figure 1; the transformer converts the AC voltage with an effective value of 220V into an amplitude of several volts to dozens of volts. alternating current; the rectifier circuit converts the alternating current into a pulsating direct current whose polarity does not change with time; the filter circuit filters out the high-frequency alternating current component in the pulsating direct current and reduces the pulsation amplitude; the voltage stabilizing circuit uses the filtered pulsating direct current voltage to Voltage stabilization and negative feedback technology further stabilize the DC voltage.
4. Definition of regulated power supply
A regulated power supply refers to a current that does not change in voltage as the voltage input to the power supply changes. The working principle is the same as a power supply + transformer, outputting a current with a constant voltage.
5. Classification of regulated power supplies
AC regulated power supply: outputs alternating current with constant effective voltage.
DC regulated power supply: DC power with constant output voltage.
6. Difference
Simply put, DC power and AC power are two different types.
DC power supply means that the direction of the current it outputs is DC;
A regulated power supply means that its output voltage is a constant value.
