TWM488136U - A power supply control device - Google Patents

Abstract

A power supply control device comprises a switch module, a detect module and a control module. The switch module is connected between an input module and a power supply port, and comprises an electromechanical relay, a solid state relay, a triac and a protect unit. The detect module detects a load value of the power supply port. The control module connects to the switch module and the detect module, and controls the conduction state of the switch module according to the load value. The control module enables the electromechanical relay before the AC Voltage from the input module gets into a voltage zero crossing, and lets the electromechanical relay, the solid state relay, the triac and the protect unit conducted at the voltage zero crossing simultaneously. Therefore, the present invention can avoid the electromechanical relay makes an arc by shunts each switches and calculates the enable timing of each switches.

Claims (9)

A power control device includes: a switch module electrically connected between an input module and a power supply port to receive an AC voltage from the input module, and to transmit the AC voltage to the power supply port; a detection module electrically connected between the other end of the input module and the other end of the power supply port to detect a load power value of the power supply port; and a control module electrically connected The switching module and the detecting module switch the state of the switch module according to the load power value detected by the detecting module. The power control device of claim 1, wherein the control module enables the switch module before the AC voltage enters a first zero crossing. The power control device of claim 1, wherein the switch module comprises: a first switch unit electrically connected between the input module and the power supply port, and electrically connected to the control module a group, wherein the first switch unit has a start state and a jump state; a second switch drive unit is electrically connected to the input module, and is connected in parallel with the first switch unit, and is electrically connected to the a control module; a second switch unit electrically connected to the input module and the second switch drive unit; a protection unit electrically connected between the second switch unit and the power supply port, and electrically connected to the control module and the first switch unit to output an emergency signal to the control module and the The first switching unit. The second switch driving unit and the second switching unit are interlocked with the protection unit. When the second switch driving unit is enabled by the control module, the second switching unit and the protection unit are also turned on. . The power control device of claim 3, wherein the first switching unit is an electromagnetic relay, and the second switching unit is a three-terminal bidirectional controllable switch. The power control device of claim 3, wherein the first switching unit enters the jump state from the startup state at a time of a first zero crossing. The power control device of claim 5, wherein the second switch driving unit, the second switching unit and the protection unit are turned on at the time of the first zero crossing. The power control device of claim 6, wherein the second switch driving unit, the second switch unit, and the protection unit are second after the jump state of the AC voltage entering the first switch unit Stop turning on at zero crossing. The power control device of claim 7, wherein the control module is that the load power value continues to be less than an overload threshold for a predetermined period of time, and the first switch unit is turned on, and the second switch unit is When not conducting, the second switch driving unit, the second switching unit and the protection unit are turned on, and the first switching unit is not turned on. The power control device of claim 8, wherein the protection unit generates the emergency signal when the load power value is greater than the overload threshold and the second switch unit is turned on, and the first switch unit is not turned on.