Based on established knowledge regarding normal operating conditions and fault diagnosis, overheating in a welding machine can be identified through the following clear indicators:
Visual and Warning Indicators
The equipment casing or the surfaces of core components (such as IGBT modules and transformers) feel noticeably hot to the touch, and the unit's temperature far exceeds normal ambient levels. An overheating warning light on the control panel remains illuminated, or the machine triggers high-temperature protection and shuts down automatically.
Quantitative Temperature Assessment
Using a temperature measuring device on core components: for qualified industrial-grade components, the temperature rise under full load should remain within 45°C. If the temperature rise exceeds 65°C, the equipment is considered to be overheating.
Evidence from Abnormal Operating Conditions
Signs such as erratic welding current fluctuations, a noticeable drop in output power, abnormal noise from the cooling fan, or blocked air ducts indicate overheating. Frequent protective throttling and the inability to sustain continuous operation also signal that the equipment is overheating.
Indicators Linked to Hidden Aging
Prolonged equipment operation under overload, a faint smell of scorching from insulation components, or localized abnormal heating at oxidized cable connections are warning signs. If left unaddressed, this type of hidden overheating can lead to component burnout.
