SIEMENS M430 inverter repair
Failure phenomenon: inverter operation in the fault code F0002
Fault analysis: inverter fault over-voltage protection is the inverter DC voltage to reach the degree of risk taken, which is a big defect of inverter design, there are many reasons caused the failure of inverter in the actual operation, the measures are more, in dealing with such failure to analyze clearly the failure reason for take appropriate measures to deal with.
First, the harm of frequency converter over voltage
Inverter over voltage is mainly refers to its intermediate DC circuit over voltage, the intermediate DC circuit over voltage main harm is that:
(1) the saturation of the magnetic circuit of the motor. For the motor, the voltage of the main high is bound to increase the magnetic flux of the motor core, may lead to saturation of the magnetic circuit, excitation current is too large, from the surface to cause the motor temperature rise too high;
(2) damage to motor insulation. After the voltage of the intermediate DC circuit is increased, the output voltage of the inverter output voltage is too large, which has a great influence on the insulation life of the motor;
(3) the direct influence on the life of the filter capacitor of the intermediate DC circuit can cause the capacitor burst. Thus the inverter manufacturers in general will be in the intermediate DC circuit over voltage value is limited to about DC800V, once the voltage exceeds the limit value, the inverter will be required to trip protection.
Two, the cause of the inverter over voltage
(1) the voltage of the DC circuit (r0026) exceeds the trip level (P2172);
2) as a result of the power supply voltage is too high, or the motor is in the regenerative braking mode to cause over voltage;
3) the slope is down too fast, or the motor is driven by the large inertia load and is under the condition of regenerative braking.
Fault repair: according to customer description for the operation of the positive inversion display F0002, after the measurement of DC bus voltage in the operation without the mutation phenomenon. Description is not a load and external issues. Measurement of switching power supply voltage +15V voltage up to 22V about the power supply voltage is too high. Replace the power IC on the electrical load test is not in the presence of failure.
SIEMENS MM430 inverter machine can not boot, fault code, F0001 current maintenance, maintenance, F0002 overvoltage undervoltage F0003 repair, F0004 Wen Weixiu, F0012 temperature signal is not normal maintenance, F0022 power module fault repair, maintenance, fault F0024 fault F0540 fault repair, F0504, SIEMENS, 430 shows, faults cannot be reset, the internal operation of the inverter smoke, no display panel can be quickly repaired. The company is equipped with various types of IGBT module, main board, driver board, power board, control board and IO board, both spot, devices using SIEMENS original accessories, maintenance speed, on-site service to Shenzhen, Dongguan, Huizhou power inverter company.
Jia Hong Wei repair service hotline: 0755-28916839, 13640994287 Shaw