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Heat Dissipation & Voltage Stabilization Methods for Dual-Power Aluminum Diffusion Welders with Output Deviation Caused by Equipment Temperature Rise
Aug 11,2026
Dual-power aluminum diffusion welders are widely used for 6-series aluminum bar welding. They adopt dual-zone heating to eliminate uneven heating of aluminum workpieces. Long-time full-load operation leads to continuous heat accumulation of power modules, creating inconsistent temperature rise between two power circuits and unbalanced output power, which triggers unilateral cold joints, incomplete fusion and local overheating deformation of aluminum bars.
I Core Principles of Output Deviation Induced by Temperature Rise
1.Component Temperature Drift: Parameters of power, sampling and control elements of both circuits change with temperature. Inconsistent heat dissipation during long full-load operation generates temperature difference, shifting voltage & current output benchmarks and creating power imbalance.
2.Mutual Thermal Interference Between Power Supplies: Compact layout of two power cabinets causes mutual thermal radiation and local heat buildup, widening temperature gap between two circuits.
3.Uneven Voltage Drop from Hot Cables: Heavy current heats power cables and aluminum busbars, increasing line resistance. Different layout & heat dissipation of two circuits lead to growing output deviation over time.
II Production Characteristics of Temperature Drift Defects
Product quality recovers temporarily after shutdown cooling then recurs cyclically. Without modifying equipment parameters, output gap between two power supplies keeps expanding and temperature difference on heating plates becomes more obvious, always biased toward one heat zone. Dust cleaning delivers short-term improvement before defects reappear.
III Heat Dissipation Optimization Schemes
1.Install thermal insulation partitions between two power circuits for physical isolation to block cross heat radiation. Replace cooling fans with identical models and clear dust & obstructed cables inside cabinets.
2.Regularly clean dust & debris on radiators and power modules; inspect and reapply aged thermal conductive paste to ensure tight component contact and smooth heat dissipation. Air-cooled equipment can be upgraded to water cooling to stabilize module temperature and narrow circuit temperature difference.
3.Symmetric layout with equal length for two groups of power cables & busbars; avoid tight bundling and reserve sufficient heat dissipation space. Tighten terminals periodically and remove oxide layers to reduce uneven voltage drop from heating.
4.Install thermal insulation between heating stations and electrical control cabinets to block high-temperature mold radiation, preventing long-term overheating of control boxes and lowering baseline equipment temperature.
IV Dual-Power Coordinated Voltage Stabilization Schemes
1.Activate Dual-Power Synchronous Follow Mode
Disable independent operation of two circuits and enable master-slave coordinated control. The system monitors output of both paths in real time and dynamically fine-tunes compensation to counteract power deviation caused by temperature drift, maintaining balanced heating power.
2.Closed-Loop Plate Temperature Compensation
Instead of relying solely on power parameters, adjust output of each circuit independently based on actual heating plate temperature feedback to offset component temperature drift and keep uniform, stable working surface temperature.
3.Bidirectional Cold & Hot Calibration
Most machines only calibrate when cold; deviation reappears after hot operation. Calibrate output consistency under both cold standby and stable hot operation status.
4.Front-End Mains Voltage Stabilization
Grid fluctuation superimposes temperature drift issues. Install voltage stabilizers to guarantee consistent input voltage for both power supplies and eliminate output imbalance from external power interference.
V Production Process Optimization
1.Avoid non-stop full-load long production; reserve idle cooling intervals between batches to ease module heat accumulation and temperature drift.
2.Adopt gradient heating to reduce instantaneous power load and slow component temperature rise for stable power output.
3.Standardize workpiece specifications & placement and unify production rhythm to maintain steady welding load and prevent aggravated power fluctuation.
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Wuxi HAIFEI Intelligent Equipment Co., Ltd.
Wuxi HAIFEI Welding Equipment Co., Ltd.
Add: 28 Shuiyun Road, Yuecheng, Jiangyin, Jiangsu Province, China. (Postal Code: 214404)
Mobile: +86 18915302352
Email: wushijie@jshaifei.com