When an inverter experiences issues upon being powered on after remaining idle for a period, many users encounter severe consequences such as a burnt mainboard or explosion of the inverter module. This situation often arises from various overlooked factors during inverter maintenance. Let us delve into the potential causes of this issue:
Firstly, the motor may continue operating due to inertia even after the inverter has been stopped. If the main output circuit and control circuit are inadequately isolated—or not isolated at all—it can lead to the inverter's main board or module getting damaged. This oversight is often due to incomplete considerations during the initial design phase of the complete electrical system, where the working environment was not adequately factored in.
To resolve this, one should disconnect the contactor connected to the inverter when the motor stops. Additionally, installing a braking mechanism for the motor can help mitigate this issue. By addressing the no-load voltage generated by the motor’s inertia, this problem can be effectively managed.
Secondly, interference from high-voltage circuits can damage the circuit board and modules. The proximity of the main circuit to the control circuit, combined with the effects of harmonic currents, can cause voltage spikes or current overloads in the control circuit. This often results in the destruction of electrical components.
The solution lies in designing the inverter with careful attention to minimizing interference from the main circuit to the control circuit. Protective measures should be implemented in the input main circuit to safeguard against high current impacts.
Thirdly, adverse weather conditions like heavy rain can expose inverters to risks from lightning strikes, which often stem from excessively high input voltages.
Installing a lightning protection device on the equipment grid can entirely prevent this issue.
These problems reflect critical details in the repair and maintenance of inverters. Addressing these concerns during the initial design phase of electrical systems can prevent unnecessary losses.
This article is sourced from: Dry Goods | Analysis of Inverter Repair Issues: Burnt Motherboards and Exploded Modules.
Main Image:
In conclusion, understanding these nuances can significantly enhance the longevity and reliability of inverters. Proper planning and execution during the design phase are essential to prevent costly damages and ensure smooth operations.
We are manufacturer of Solar Inverter in China,OEM and ODM are acceptable, if you want to buy Off Grid Hybrid Inverter,Solar Power Inverter, please contact us.
Solar Power Inverter,Solar Inverter,Hybrid Inverter,Solaredge Inverter,Solar Power Inverter
suzhou whaylan new energy technology co., ltd , https://www.whaylan.com