We all know that electricity can generate magnetic fields, and magnetic fields can also be converted into electricity. When one coil is connected to alternating current, an alternating magnetic field will be generated, and then the alternating magnetic field will pass through another coil, and a voltage will be induced on the other coil. This is the principle of a transformer. The number of turns of each coil is related; simply put, the transformer uses the principle of magnetic coupling, which is composed of primary and secondary windings (coils). The voltage across the coil is proportional to the number of turns of the coil, so the number of turns of the primary and secondary coil The ratio determines the transformation ratio of this transformer. Obviously, the transformer has no voltage regulation function, because the secondary voltage changes with the primary voltage.
      The voltage stabilizer uses the principle of negative feedback. For example, open the tap of the tap water to half, and install a sensor at the outlet of the tap to detect the amount of water. If the amount of water is large, it will automatically If the water output is small, it will automatically turn on the faucet to keep the water output constant. The principle of the voltage stabilizer is roughly the same. There is a circuit in the voltage stabilizer that can detect the change of the output voltage (the voltage divider resistance sampling circuit at the inverting input of the error amplifier, this circuit can now be reduced to only one integrated chip), when the output voltage When changing, the circuit that detects the change of the output voltage is provided by the chip to provide feedback to the private server motor, and then the private server motor drives the arm to automatically adjust the position of the brush, so as to stabilize the output voltage. This is the simplest voltage stabilizer.
      To sum up, the transformer has no function of voltage regulation, but the negative feedback technology can be used to design a transformer with voltage regulation, which is no problem, but this is not the case with general transformers. The output voltage of the transformer does not change much within a certain range of use, and it is not a concept with what we call voltage regulation.
      All voltage stabilizers utilize the same technology to stabilize the output voltage. The output voltage is sampled through a voltage divider resistor connected to the inverting input of the error amplifier, whose non-inverting input is connected to a reference voltage. The error amplifier is always trying to force the inputs to be equal across it. To this end, it provides load current to ensure stable output voltage (that is, negative feedback)
Knowledge Supplement:
 There are many types of voltage stabilizers. Common voltage stabilizers are: automatic AC voltage stabilizer, purified power supply AC voltage stabilizer, parameter voltage stabilizer, high-power compensation power stabilizer, non-contact intelligent stabilized power supply .
 The electromechanical system of the telecommunications sector is a modern management realized through modern electronic technology and equipment. It involves communication technology, electronic technology, automatic control, computer technology and other disciplines, and has the characteristics of technology-intensive, high-tech, and high-performance. Power supply is the foundation of electromechanical equipment. If there is a problem with the power supply, it will bring a series of problems and even interruptions. Therefore, in reality, electricity consumption puts forward strict requirements on many equipment, including imported equipment and other precision instruments. In order to improve the reliability of the power supply system, relevant departments have added corresponding voltage stabilizers, stabilized power supplies, high-power Compensated power regulators are widely used in power distribution due to their economical and practical advantages.