How to judge the effect of the device to identify the motor?
When doing quick commissioning, be sure to follow the guidance procedure given in the manual. In particular, the motor nameplate data must be entered accurately. If the nameplate data input of the motor is incorrect, the motor modeling will not be accurate and the control will not have a good running effect. The nameplate data of the motor includes: rated voltage, rated current, rated power, rated speed, and rated power factor. If it is vector control, there is also a rated excitation current that needs to be determined. Among them, the rated speed, the nameplate data specified in China's motor standard does not include this item, so this parameter must be obtained from the motor manufacturer. To accurately slip or the rated speed value, the power factor parameter, once the motor is determined, according to the nameplate data can be Calculate, or ask the motor manufacturer for the exact value. The rated excitation current can be automatically calculated by quick commissioning and displayed in r0331, but generally the internal calculated parameters are not accurate, and the measured values are closer to the actual data of the motor. How to determine the specifics, compare Rosso, or carefully interpret the relevant statements.
In short, to accurately determine the motor nameplate data, the more troublesome is the vector control and the measurement of the magnetizing current. If it is V/F control, parabolic control, it is very simple. Whether it is simple or complex, it is important to accurately set the motor nameplate data. This is the basis for the device to identify the motor. In the manual, there is an equivalent circuit of the motor. In fact, the identification of the motor by the device is to determine the parameters in the equivalent circuit. This is called modeling.
For V/F and parabola control, the P3900=1/2/3 in the quick commissioning must have a true PASS, and then immediately after P1910=1, after the ON closing command, the identification is automatically completed, and no fault P0041 occurs. . It can be considered that the identification has been successfully passed. For the vector control P1300=20/21/22/23, not only P1910=1 must be automatically PASS, P1910=3 must also be automatically PASS, and P1960=1 must be automatically PASS. Only after successfully passed the self-identification work.
The effect of self-identification is to run the motor at no load over the entire speed range. It is possible to discriminate whether there is no obvious electromagnetic noise or vibration during the operation of the motor by hand or with the ear. Generally, after correctly performing the above two identification tasks, the motor operation is very smooth and stable, unless there is a problem with the machine, or the dynamic balance of the motor is not good, causing mechanical vibration and mechanical noise. To distinguish between mechanical noise and electromagnetic noise, analyze it yourself. It is not exhaustive here.
If the vector control is used, the MM4 can also perform inertia compensation for the coaxial connection of the large inertia roller. For the specific settings and debugging, refer to the related function diagram and parameter table description, which are omitted here. In a word, the actual running effect of the motor is the best test of the pros and cons of the debugging work.
