Case of overheat protector for inverter welding machine-JUC-31 temperature switch

The inverter welding machine is more energy-saving and lighter than ordinary welding machines, so the development is also very fast. Its quality and reliability are also an important reason for the development, and the reliability and durability depend on the heat dissipation and overheating protection technology of high-power transistors. Therefore, in order to ensure the service life and use effect of the inverter welding machine, overheating protection is a very important issue. Today, I will study with you the overheating protection processing method of the inverter welding machine and the protection component which has been used - JUC-31 temperature control switch.

At present, the high-power transistors used in inverter welding machines mostly use IGBT, MOSFET, etc. When the output current of the inverter welding machine is supplied to the welding work, the high-power transistors consume their own power. The power loss density can be solved by a radiator, which can quickly dissipate the heat converted from the power consumption of the transistor from the substrate.

The radiator is to ensure the reliable operation of the transistor under normal conditions. If the ambient temperature is very bad or the heat dissipation is poor, it can still cause the transistor to overheat and fail. In order to prevent the component from being burned out under abnormal working conditions, it is necessary to add temperature control to the circuit. The temperature control switch is used to detect the base of the transistor module. When the temperature exceeds the set temperature, the temperature switch cuts off the input signal. When the temperature of the transistor module reaches the normal value, the circuit returns to normal working state. The model used for the temperature control switch is JUC-31F. As a contact temperature-sensing sudden jump type plastic-sealed thermostat, it adopts the international TO220/Y220 standard package, and the product installation is very convenient.

The inverter welding machine adopts heat dissipation and overheat protection technology, which can make the welding machine withstand the test of long-term work under full load. At the same time, the JUC-31F temperature control switch is used to avoid the welding machine being burned due to excessive temperature under abnormal conditions. It greatly improves the reliability and service life of the inverter welding machine.