The feedback unit supplier reminds you that the causes of frequency converter failures are closely related to the production environment, mainly including the following:
1. The cause of frequency converter failure is corrosive gas. Some chemical manufacturers have corrosive gases in their workshops, which may be one of the causes of frequency converter failures, as follows:
(1) The malfunction of the frequency converter was caused by poor contact between the toggle switch and relay due to corrosive gases.
(2) The fault of the frequency converter is caused by a short circuit between crystals due to corrosive gases.
(3) Terminal corrosion caused a short circuit in the main circuit, resulting in a malfunction of the frequency converter.
(4) The corrosion of the circuit board causes a short circuit between various components, resulting in a malfunction of the frequency converter.
2. Malfunctions of frequency converters caused by conductive dust such as metals and dust. The factors that cause frequency converter failures of this kind mainly exist in production-oriented enterprises with high dust such as mines, cement processing, and construction sites.
(1) Excessive conductive dust such as metal can cause a short circuit in the main circuit, leading to a malfunction in the frequency converter.
(2) Dust clogged the cooling fins, causing them to trip and burn out due to high temperature, resulting in a malfunction of the frequency converter.
3. Condensation, moisture, dampness, and high temperature can cause faults in the frequency converter. These factors that cause frequency converter failures are mainly due to weather or special environments in the place of use.
(1) Due to moisture, the door pole may change color, resulting in poor contact and causing the frequency converter to malfunction.
(2) The inverter tripped due to overheating caused by high temperature.
(3) The frequency converter malfunction was caused by the sparking phenomenon between the copper plates of the main circuit board due to moisture.
(4) Moisture causes electrical corrosion of the internal resistance of the frequency converter, resulting in wire breakage and causing the frequency converter to malfunction.
(5) The condensation inside the insulation paper causes discharge breakdown, leading to the malfunction of the frequency converter.
The main cause of frequency converter failure due to human factors is inaccurate selection and failure to adjust parameters to the optimal usage state.
1. Inaccurate selection of frequency converters can cause overloading and ultimately lead to frequency converter failures.
2. The parameters have not been adjusted to the optimal usage state, resulting in frequent overcurrent, overvoltage and other tripping protections of the frequency converter, leading to premature aging and malfunction of the frequency converter.