Current source contactor anti-shaking device and control method thereof

Abstract

The invention discloses a novel current source-type contactor electric-dazzling prevention device and a control method thereof. The novel current source-type contactor electric-dazzling prevention device comprises a power supply and energy storage control and measurement unit, a DC source output control unit, a bus voltage and contactor current measurement unit, an AC and DC switching and EMC suppression unit, a man-machine interaction unit for manual operation and a core processing unit, wherein the core processing unit is respectively electrically connected with the power supply and energy storage control and measurement unit, the DC source output control unit, the bus voltage and contactor current measurement unit, the AC and DC switching and EMC suppression unit and the man-machine interaction unit. Setting of contactor parameters and external adjustment are not needed, and the magnitude of DC standby current and the magnitude of AC standby current of the contactor can be matched automatically; over large current or over small current caused by whether the DC standby is matched with DC resistance of the contactor does not need to be considered; and the magnitude of DC output current can be ensured in a condition of total short circuit of load.

Description

technical field [0001] The invention relates to a current source type contactor anti-shaking device and a control method thereof. Background technique [0002] AC contactors are usually used in AC circuits, which use the current flowing through the coil to generate a magnetic field, so that the contacts are closed to achieve the purpose of controlling load electrical appliances. After electrification, the coil will generate a strong magnetic field, so that the static iron core in the electromagnetic system will generate electromagnetic attraction to the armature, and drive the contacts to switch or close. When the power is turned off, the magnetic force disappears, and the contacts return to their original state: normal Closed is closed, normally open is open. During the use of the traditional AC contactor circuit, due to the instability of the power supply system, there will be a momentary loss of voltage at the shaking point, resulting in the sudden release of the contact...

AI Technical Summary

Problems solved by technology

[0004] The existing technology has the following disadvantages: using the voltage output mode, it is difficult to obtain the corresponding voltage of the contactor for DC maintenance

If the contactor resistance is set incorrectly or not set, the output voltage of the contactor will not match the DC voltage required by the contactor

If the output DC voltage is too large, the contactor will be burned or the device will be damaged. If the output DC voltage is too small, the contactor will not be able to rely on DC pull-in when the power is shaking, resulting in the release of the contactor.

Voltage regulation output mode, when the contactor coil is short-circuited, the DC voltage output of the device will easily burn out due to excessive output current

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