Differences Between Linear Regulated Power Supplies and Switching Power Supplies
1. Stable voltage:
When there is an instantaneous fluctuation in the grid voltage, the regulated power supply will compensate for the voltage amplitude with a response speed of 10-30ms, stabilizing it within ± 2%.
2. Multi functional comprehensive protection:
In addition to the basic function of stabilizing voltage, voltage regulators should also have the most basic protection functions of overvoltage protection (exceeding+10% of the output voltage), undervoltage protection (below -10% of the output voltage), phase loss protection, and short-circuit overload protection.
3. Sharp pulse suppression (optional):
The power grid sometimes experiences sharp pulses with high amplitude and narrow pulse width, which can penetrate electronic components with lower voltage resistance. The anti surge components of the regulated power supply can effectively suppress such sharp pulses.
4. Isolate conductive EMI electromagnetic interference (optional):
Numerical control equipment often adopts AC/DC rectification+PFC high-frequency power factor correction, which has certain interference and strict requirements for interference sources. The filtering component of the regulated power supply can effectively isolate the interference of the power grid on equipment and also effectively isolate the interference of equipment on the power grid.
5. Lightning protection (optional):
The required lightning protection capability.
The power supply of DC stabilized power supply is mostly AC power supply. When the voltage or load resistance of the AC power supply changes, the direct output voltage of the stabilizer can remain stable. The parameters of a voltage regulator include voltage stability, ripple factor, and response speed. The former represents the impact of changes in input voltage on output voltage. Ripple coefficient represents the magnitude of the AC component in the output voltage under rated operating conditions; The latter represents the time required for the voltage to return to normal when there is a sudden change in input voltage or load. DC stabilized power supplies are divided into two types: continuous conductive and switch mode. The former uses a transformer to convert single-phase or three-phase AC voltage to an appropriate value, and then rectifies and filters it to obtain an unstable DC power supply, which is then stabilized by a voltage regulator circuit to obtain a stable voltage (or current). This type of power supply circuit is simple, with low ripple and minimal mutual interference, but it has a large volume, consumes a lot of materials, and has low efficiency (often below 40% to 60%). The latter adjusts the output voltage by changing the on-off time ratio of the adjusting component (or switch) to achieve voltage stabilization. This type of power supply has low power consumption and an efficiency of about 85%.
