TH40204B - Electromagnetic switches and welding machines that use the same - Google Patents

Abstract

DC60 (24/11/52) The welding machine is equipped with an electromagnetic switch for turning on and off power to be supplied to the welding machine, a control circuit for controlling the on and off switch according to the welding start signal and the circuit. Self-stabilizing for switch retention This self-stabilizing circuit releases the switch from self-stabilizing when the voltage of the The lower control circuit is no more than the switch opening voltage. Therefore, when the supply voltage drops too low to maintain the open state, the switch is released from its stabilization. Therefore, the voltage cannot be supplied again to the circuit. control if the start signal is not turned off. As a result, the switch windings are free from burns. In addition, the current can also be cut off when the temperature of the switch winding rises to less than a certain value. Therefore, if The abnormal temperature of the coil is detected, the coil current is cut off. according to the result of the coil of the switch will be completely burn-free. The welding machine has an electromagnetic switch for turning on and off power to be supplied to the welding machine, a control circuit for controlling the on and off of the switch according to the welding start signal, and a self-stabilizing circuit for maintaining the switch. This self-stabilizing circuit releases the switch from self-stabilizing when the voltage of the The control circuit is lower than the open voltage of the switch. Thus, when the supply voltage is too low to maintain the open state, the switch is released from its stabilization. Therefore, the voltage cannot be supplied again to the circuit. control if the start signal is not switched off. As a result, the switch winding is free from burnout. In addition, the current can also be cut off when the temperature of the switch winding rises to less than a certain value. Therefore, if The abnormal temperature of the coil is detected, the coil current is cut off. according to the result of the coil of the switch will be completely free from burns

Claims (6)

Disclaimers (all) that will not appear on the advertisement page: 1.The welding machine consists of An electromagnetic switch is electrically connected to a welding machine and can be operated to conduct electricity. To pay to the welding machine Where the electromagnetic switch has a closed voltage equal to or lower than the magnetic switch value Electric open circuit The electromagnetic switch consists of a self-stabilizing switch that is electrically connected with a magnetic switch. Electricity in a self-stabilizing switch closes when the electromagnetic switch is triggered; A control circuit that is electrically connected to a magnetic switch and has an operating voltage and will work to Controls the excitation of the electromagnetic switch according to the welding star signal. In which the control circuit is assembled With a sub-loop that can work to close the circuit corresponding to the welding star signal to trigger the switch. It is able to operate to open the circuit at the specified time after the welding starter 1; 1 signal and the self-stabilizing circuit that is electrically connected to the electromagnetic switch and the control circuit, which can be operated to stabilize the electromagnetic switch at Closed circuit through the self-stabilizing switch when the electromagnetic switch is And to open the self-stabilizing switch when the operating voltage of the control circuit drops to a value not greater The closing voltage of the electromagnetic switch to make the electromagnetic switch open circuit. 2.The welding machine consists of An electromagnetic switch is electrically connected to a welding machine and can be operated to conduct electricity. To pay to the welding machine Where the electromagnetic switch has a closed voltage equal to or lower than the magnetic switch value Electric open circuit The electromagnetic switch consists of a self-stabilizing switch that is electrically connected with a magnetic switch. Electricity in a self-stabilizing switch closes when the electromagnetic switch is triggered; A control unit with an operating voltage for controlling the actuation of an electromagnetic switch according to Welder start signal Where the control consists of subsections for supplying current to The electromagnetic switch is set for a specified time after the welding machine has been started to trigger the mother switch. Electromagnetic iron and for blocking current from flowing through the subsection to the electromagnetic switch after a specified time; And the self-stabilizing section for keeping the electrical switch closed through the self-stabilizing switch when the magnetic switch Blue is activated and for the self-stabilizing switching circuit when the operating voltage of the control factor is reduced to the Not greater than the closing voltage of the electromagnetic switch to make the electromagnetic switch open circuit. 3.The welding machine consists of: an electromagnetic switch that is electrically connected to the welding machine and can work to conduct electricity. To supply to the welding machine by which the electromagnetic switch consists of a coil And the contact sensing The overheater can work to detect the coil temperature and open the circuit when the coil temperature is detected. The handle is not less than the rated value to cut off the current going to the winding; And a control circuit that is electrically connected to the electromagnetic switch and can work to control the Activate the electromagnetic switch according to the welding star signal. 4. Electromagnetic switch consists of: a contact that can be operated to switch to the open state and the closed state; A coil that can be operated to drive the operation of the contacts to the open state and to the closed state; A temperature sensing element that is placed close to the coil where it can be operated to detect Winding temperature; The current disconnector is electrically connected to the coil and the heat sensing unit, which can It works to cut off the current through the coil when the heat sensing part detects a temperature not less than a predetermined value. 5. The welding machine consists of Electromagnetic switch for conducting electrical power to the welding machine, where the electromagnetic switch consists of a coil and a heat sensing element for detection. Captures the temperature of the coil and for blocking the current from reaching the coil when the temperature of the coil is detected. That not less than a predetermined value; And controls for controlling the excitation of the electromagnetic switch according to the start signal Welding machine 6. Electromagnetic switch consists of: a contact that can be operated to switch to the on state and to the closed state; A coil that can be operated to drive the operation of the contacts to the open state and to the closed state; Thermal sensing part for detecting the temperature of the coil; Current cross section for blocking current from flowing through the coil when the heat sensing section Detects that the temperature is not less than a set value.