What are the types of AC stabilized power supplies?
Regarding the models and types of regulated power supplies, they can generally be divided into four categories. DC, AC, inverter and switching regulated power supplies. For these four different types of regulated power supplies. Although their working methods and principles have some similarities, they also have many differences. The following three sections will introduce in detail these four different models and types of regulated power supplies.
The first category is AC regulated power supply. AC is divided into single-phase and three-phase regulated power supply, and can also be divided into contact and non-contact regulated power supply. In practical applications, it can be summarized into the following commonly used AC stabilized power supply classifications:
① Ferromagnetic resonance AC voltage stabilizer. It consists of a saturable choke and corresponding capacitors and has constant voltage volt-ampere characteristics.
②Magnetic amplifier type AC voltage stabilizer. A magnetic amplifier and an autotransformer are connected in series, and electronic circuits are used to change the impedance of the magnetic amplifier to stabilize the output voltage.
③Sliding AC voltage regulator. The output voltage is stabilized by changing the position of the transformer sliding contact.
④Inductive AC voltage stabilizer. By changing the phase difference between the secondary and primary voltages of the transformer, the output AC voltage is stabilized.
⑤Thyristor AC voltage regulator. Use thyristors as power adjustment components. High stability, fast response and no noise. But it will cause interference to communication equipment and electronic equipment. After the 1980s, three new types of AC stabilized power supplies appeared: compensated AC voltage stabilizers. CNC and stepper AC voltage regulators. Purified AC voltage regulator. It has good isolation effect and can eliminate the peak interference from the power grid.
The second largest category is DC regulated power supply:
Also known as DC voltage regulator. Most of its power supply voltage is AC voltage. When the voltage of the AC power supply voltage or the output load resistance changes, the direct output voltage of the regulator can remain stable. The parameters of the voltage regulator include voltage stability, ripple coefficient and response speed.
The third category is inverter regulated power supply
The so-called inverter regulated power supply is also called a variable frequency power supply. This variable frequency power supply is controlled by a 16-bit Motorola processor, high-frequency PWM design, and driven by imported Mitsubishi 1GBT. The efficiency reaches more than 85%. The response is fast. For 100% load removal/loading, the voltage stabilization response time is within 2ms. This variable frequency power supply has strong overload capacity, and the instantaneous current can withstand 300% of the rated current. The waveform is pure, the frequency is high and stable, and no interfering magnetic waves (EMI, EMC) are produced. Variable frequency power supply is not only the best power supply for R&D, laboratories and measurement rooms, but also the standard power supply for EM/EMC/safety testing.
The fourth category is switching regulated power supply
The schematic diagram and equivalent schematic block diagram of the switching regulated power supply is composed of a full-wave rectifier, a switching tube V, an excitation signal, a freewheeling diode Vp, an energy storage inductor and a filter capacitor C. In fact, the core part of the switching regulated power supply is a DC transformer.
There is also a numerically controlled voltage stabilized power supply:
CNC regulated power supply: It samples the output of the equipment through the observation area, and compares and checks the current voltage with the rated voltage. If the comparison is a negative value, the data is sent to the central processing unit (CPU), and the central processing unit makes a voltage addition. The command. At the same time, the detection area detects whether the semiconductor is turned on or off. After confirming that it is correct, the central processor issues a voltage increase command to control the semiconductor operation, thereby reaching the rated voltage standard. If the value is positive, the central processor will issue a voltage reduction command, and the entire digital process only takes 0.048 seconds.
