Electric-dazzling prevention auxiliary power supply in low-voltage alternating current control loop and power supply method thereof

Abstract

The invention relates to an electric-dazzling prevention auxiliary power supply method, in particular to an electric-dazzling prevention auxiliary power supply in a low-voltage alternating current control loop and a power supply method thereof. The auxiliary power supply is characterized by comprising a loop control switch, a current output control unit, an energy storage unit, a direct current power conversion circuit, a central control unit and electric equipment (such as an alternating current contactor and the like), wherein a low-voltage alternating current voltage end is loaded at two ends of the electric equipment through a switch K1 of the loop control switch; the electric equipment is electrically connected with an output end of the current output control unit through another switch K2 of the loop control switch; an input end of the current output control unit is electrically connected with an output end of the direct current power conversion circuit; and the output end of the direct current power conversion circuit is electrically connected with a charging end of the energy storage unit. The auxiliary power supply can continuously supplies power to a power supply loop during power supply fluctuation, and cannot influence an original control loop when a module is failed or the voltage of the power supply is lower than working voltage of the power supply.

Description

technical field [0001] The invention relates to a power supply method for an anti-sway auxiliary power supply, in particular to an anti-sway auxiliary power supply and a power supply method in a low-voltage AC control circuit. Background technique [0002] A large number of control components such as AC contactors are used in industrial control circuits. When the power supply fluctuates, it will cause the AC contactor to trip and affect the normal operation of the control circuit. At present, the anti-sway auxiliary power supply module is connected in series in the control circuit to prevent the impact of power fluctuations on the AC contactor. The anti-shake auxiliary power supply module converts AC power supply into DC power supply. When the AC power supply is abnormal, the module can continue to supply DC power by relying on the energy stored in the internal capacitor or battery. Since the auxiliary power supply module is connected in series to the power supply circuit, ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the influence of the existing anti-shaking auxiliary power supply module that must be connected in series in the control loop, its own fault and its working power supply voltage range being smaller than the voltage working range of the AC contactor on the industrial control loop, the present invention provides a Continue to supply power to the power supply circuit when it fluctuates, and can prevent shaking auxiliary power supply and power supply method in the low-voltage AC control circuit that will not affect the original control circuit when the module itself fails or the power supply voltage is lower than its working voltage

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