Delta inverter fault output which parameter is set?
Parameter settings, class failures, frequency converter in use, whether it can meet the requirements of the transmission system, the parameter settings of the inverter is very important, if the parameter is not set correctly, it will cause the inverter not to work properly.
Overvoltage overvoltage fault of inverter DC bus voltage on the tributaries. Under normal circumstances, the average DC inverter three-phase full wave rectifier after. If 380V line voltage calculation, the average DC voltage Ud= = 513V. 1.35 U line in the overvoltage occurs when the DC bus capacitor will be when the charging voltage to about 760V, inverter over-voltage protection action. Therefore, inverter, have a normal range of working voltage, when the voltage of the inverter is likely to damage more than this range, there are two types of common overvoltage.
Overcurrent fault overcurrent fault can be divided into acceleration, deceleration and constant current. It may be due to the deceleration time is too short, the inverter load mutation, uneven load distribution, cause the output short circuit and so on. At this time can be extended through the deceleration time, and reduce the load of the braking element, mutation, plus load distribution for design, check on the line. If you disconnect the load converter or overcurrent fault, that inverter inverter circuit has ring, need to replace the frequency converter.
1 undervoltage show that the inverter power input part of the problem, you need to check before you can run. ?5.2, the temperature is too high, such as motor temperature detection device, check the cooling situation of the motor; inverter temperature is too high, check the frequency converter ventilation.
Overload overload fault include frequency overload and overload. The electric machine may be accelerated in short time, the DC brake is too large, the grid voltage is too low, the heavy load causes. Usually by extending the acceleration time and prolong the braking time, check the power voltage. The heavy load, the motor and inverter can not drag this may be due to mechanical load, lubrication is not good. The former must replace high power motor and inverter; if the latter want to overhaul production machinery.
