In the past, transistor inverters mainly had the following disadvantages: easy to trip, not easy to restart, and low overload capability. Due to the rapid development of IGBT and CPU, the inverter has improved the self-diagnosis and fault prevention functions, which greatly improves the reliability of the inverter.
If the "all-area automatic torque compensation function" in the vector control inverter is used, the cause of the failure such as "insufficient starting torque" and "decreased output due to environmental conditions" will be well overcome. This function uses the high-speed calculation of the microcomputer inside the inverter to calculate the torque required at the current time, and quickly corrects and compensates the output voltage to offset the change in the output torque of the inverter caused by changes in external conditions.
In addition, since the software development of the inverter is more perfect, various fault prevention measures can be set in the inverter in advance, and after the fault is resolved, the operation can be continued, for example, the motor in the free parking process is restarted; The internal fault is automatically reset and maintained continuously; when the load torque is too large, the operating curve can be automatically adjusted to detect the abnormal torque of the mechanical system.
There are many reasons for the failure of the inverter. Only in practice, after continuous exploration and summary, various faults can be eliminated in time.
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