Low-voltage inverter heat sink

The low-voltage inverter heat sink is a critical thermal management component, primarily responsible for dissipating the heat generated by the power modules during operation. This prevents overheating and damage to the components, ensuring the inverter’s long-term stable performance.

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Low-voltage variable frequency drive

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Detailed description

The low-voltage inverter heat sink is a critical thermal management component, primarily designed to dissipate the heat generated by the power modules during operation, thereby preventing overheating and device failure and ensuring the inverter’s long-term stable performance.
Low-voltage variable-frequency drives typically operate at voltage levels of 380 V or 690 V. During operation, power devices such as IGBTs generate continuous heat, which is conducted through a thermally conductive substrate to the heat sink. By leveraging heat‑dissipating fins to increase the heat‑dissipation surface area and employing an internal cabinet fan for forced air cooling, the heat is expelled into the ambient air, thereby maintaining the device temperature within its allowable range.
The most common material is aluminum alloy, which is lightweight and offers excellent thermal conductivity. Heat sinks are available in two main types: extruded‑profile heat sinks and finned‑plate heat sinks. Low‑power inverters typically use integrated extruded‑profile heat sinks, while high‑power models employ finned‑plate designs for superior heat dissipation.
Keeping the radiator surface clean and free of dust blockages is a key maintenance task; dust buildup can impede heat dissipation, triggering over‑temperature alarms, derating, or even shutdowns. Regular dust removal helps extend the overall service life of the equipment.

Low-voltage inverter heat sink

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Insert-type heatsink

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