AC regulirano napajanje opskrba koncept
The concept of AC regulated power supply is an electronic device that can provide a stable AC power supply for the load. Also known as AC voltage stabilizator. For parametri i quality indicators of AC regulated power supply, please refer to DC regulirano napajanje napajanje opskrba. Različiti elektronički uređaji require a relativno stabilno AC napajanje opskrba, especial when računalo tehnologija je primijenjeno to various polja, the direct power supply from the AC grid without any measures can no longer meet the needs.
AC regulirano napajanje opskrba koncept
An electronic device that can provide a stable AC power supply to a load. Also known as communication. Remote control, telesignaling and telemetry related to [2].
Basic princip i sastav of AC power opskrba
At present, in power plants, so-called primary load industrial and mining enterprises, and some substations, the continuous and reliable power consumption is the basic condition for the safe operation of the motor. Auxiliary contact directly (or via low-voltage, time-delay relay) starts the backup power supply input, this method has no phase frequency detection, the success rate of power switching is low or the switching time is long, and the motor reset current is too large and it is easy to exceed the allowable value range and be damaged by impact , especially in some occasions where high-power motors and high-voltage motors are used, because the voltage decays slowly after the motor is powered off, if the backup power is turned on without checking the synchronization conditions when the residual voltage is large, the starting/standby transformer and the motor will have It may be damaged by severe impact. If the residual voltage drops to a certain level (such as between 20[[ percent ]]-40[[ percent ]]Un), then put in the backup power supply. Due to the long power-off time, The speed of the electric motor drops greatly, and the self-starting of the motors in groups causes the busbar to continue to lose pressure seriously, and some auxiliary machines are bound to withdraw.
In order to solve the the above problems, this device will automatically track and monitor the frekvencija, voltage and phase of the power supply at both ends of the switch for a long time tijekom normal power consumption. At the same time, use an appropriate matematički model (not only consider the current phase difference and frequency difference, but also consider the change rate of the future phase difference and frequency difference) combin with the preset time before the switch is to be closed, calculate the phase difference and frequency of the closing point in the future. The difference is compared with the preset allowable phase difference and frequency difference, and when the conditions are met, it will send out a closing and tripping pulse signal.
