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Electrical knowledge

The difference between transformer and voltage stabilizer

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Update time : 2018-02-02 15:16:02
As we all know, electricity can occur magnetic field, the magnetic field is also converted into electricity. A coil through the AC, there will be alternating magnetic field, and then the alternating magnetic field through the other coil, the other coil will be induced voltage, which is the principle of the transformer, how much voltage transformer and these two The number of turns of a coil; Briefly, the transformer is the use of magnetic coupling principle, by the primary and secondary windings (coils), the coil voltage and coil size is proportional to the number of turns, so the primary secondary turns ratio turns The resolution of this transformer ratio. Obviously there is no voltage regulator transformer effect, because the secondary voltage changes with the primary voltage changes.

The regulator is the use of negative feedback principle, for example, tap the tap open to half, at the exit of the tap fitted with a sensor that can detect the amount of water, if the water is large, it is active The faucet off a little smaller, if the water is small, take the initiative to open a larger faucet, this has always insisted on a steady flow of water. Regulator principle is generally the case, there is a circuit in the regulator can detect changes in output voltage (error amplifier inverting input voltage divider resistance sampling circuit, the circuit can now be reduced to just an integrated chip), when the output voltage Changes, the detection of changes in the output voltage from the circuit chip supply feedback to the private service motor, and then by the private sector motor arm automatically adjust the position of the brush, so that the output voltage stability, which is the most simple regulator.
In summary, the transformer is not the effect of regulation, but the use of negative feedback technology can be described with a transformer regulator effect, which is no problem, but the average transformer is not the case. Transformer in a certain range of use of output voltage changes is not big, and we call the regulator is not a concept. All regulators use the same technique to achieve output voltage stability. The output voltage is sampled by a voltage divider connected to the inverting input of the error amplifier. The noninverting input of the error amplifier is connected to a reference voltage. Error amplifiers are always trying to force their inputs to be flat. To this end, it supplies the load current to ensure that the output voltage is stable.