XINLI BOILER

How does the biomass boiler inverter make it "live" longer?

09 Dec, 2021

　　Inverters are often used in electrical systems, but the service life of the inverter will also be shortened due to overvoltage and overcurrent. Once the inverter fails, it will cause serious failures in the entire electrical system. Therefore, electricians have gradually paid attention to and paid attention to the maintenance skills of inverters. After all, anyone would want to "live" the inverter they bought for longer, so how can the inverter "long life"?

　　1. Correct wiring and parameter settings. Before installing the inverter, be sure to read its manual, master its usage, precautions and wiring; after installation, set the parameters correctly according to the use.

　　2. The ambient temperature has a great influence on the service life of the inverter. When the ambient temperature rises by 10°C, the life of the inverter is halved, so the surrounding ambient temperature and the problem of the inverter's heat dissipation must be solved.

　　3, V/F control belongs to constant torque adjustment. The vector control increases the output torque of the motor in proportion to the square of the voltage, thereby improving the output torque of the motor at low speed.

　　4. If the system adopts the power frequency/frequency conversion switching mode, the interlock between the power frequency output and the variable frequency output must be reliable. In addition, the inverter must be stopped when starting and stopping the pump and the power frequency/frequency conversion switch before operating the contactor. Since contact adhesion and arc extinguishment of large-capacity contactors require a certain amount of time, the above-mentioned switching sequence and time should be considered thoroughly.

　　5. The problem of external control signal failure. Generally, there are several situations: incorrect signal mode, incorrect terminal wiring, incorrect parameter settings, or problems with the external signal itself.

　　6. Pay attention to the relationship between speed and head. The selection of the motor and its optimal working period are more important issues. If the frequency converter runs below 5HZ for a long time, the motor heating becomes a prominent problem.

　　7. The difference between overcurrent trip and overload trip. Overcurrent is mainly used to protect the frequency converter, and overload is mainly used to protect the motor. Because the capacity of the frequency converter sometimes needs to be increased by one or two blocks than the capacity of the motor, in this case, the frequency converter may not necessarily overcurrent when the motor is overloaded. The overload protection is carried out by the electronic thermal protection function inside the inverter. When the electronic thermal protection is preset, the "current draw ratio" should be accurately preset, that is, the percentage of the ratio of the rated current of the motor to the rated current of the inverter.