When an inverter is left unused for a period of time and then powered back on, some users may encounter issues such as the mainboard or explosion module being damaged. This often happens when the motor starts up again due to inertia after stopping. Let’s delve into the possible reasons for this situation and explore potential solutions.
Firstly, one common cause is that the motor continues to generate power even after stopping due to its inertia. If the main output circuit and control circuit of the inverter aren’t properly isolated, the resulting voltage surge can damage the inverter's main board or module. This oversight might occur during the initial design phase of the entire electrical system, where the working environment isn’t adequately considered.
To address this issue, it’s advisable to install a contactor after the inverter that disconnects the motor upon stopping. Additionally, if feasible, incorporating a braking mechanism can help hold the motor in place, preventing the generation of unwanted no-load voltage.
Another factor could be electromagnetic interference from high-voltage currents in the main circuit. When the current generates harmonics, it can cause overloads in the control circuit, leading to component failure. During the design process, the inverter should account for this interference and implement measures to reduce or eliminate it. For instance, adding protective elements to the input main circuit can prevent large currents from damaging the inverter.
Lastly, adverse weather conditions like heavy rain can also pose risks. Lightning strikes during such weather can lead to excessive input voltages, which may damage the inverter. To mitigate this risk, installing lightning protection devices on the equipment’s power grid is essential, as it can effectively resolve this issue.
These problems reflect important details that often emerge during inverter repairs. Addressing them early in the design phase of electrical systems can save significant costs and prevent unnecessary downtime.
This article was sourced from: *Insight | Analysis of Inverter Repair Issues: Motherboard Damage and Module Explosion*.
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As engineers continue to refine inverter technology, understanding these nuances becomes increasingly critical for both maintenance and innovation. Proper isolation techniques, robust interference mitigation strategies, and weatherproofing measures are all essential steps toward ensuring long-term reliability.
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