A realization method of full-frequency band anti-vibration of variable-frequency motor

Abstract

The invention discloses an implement method for full-band vibration prevention of a variable frequency motor. The implement method includes the following steps that a motor full-band vibration feature data base is established, wherein for a non-variable frequency motor with the potential variable frequency market, full-band vibration response curves allowed by the structure of the non-variable frequency motor are measured and obtained, a plurality of vibration peaks are obtained from the full-band vibration response curves, and the full-band vibration response curves and the corresponding vibration peaks are stored into the motor full-band vibration feature data base; simulation analysis is conducted on the structure of the variable frequency motor, wherein the full-band vibration response curve, corresponding to the variable frequency motor to be researched and developed, of the non-variable frequency motor is called from the motor full-band vibration feature data base, the structure of the variable frequency motor to be researched and developed is designed, simulation analysis is conducted on the structure of the variable frequency motor to be researched and developed, it is ensured that the rated work point of the variable frequency motor to be researched and developed avoids the vibration peaks of the full-band vibration response curve, and therefore full-band vibration prevention of the variable frequency motor is achieved.

Description

technical field [0001] The invention relates to a method for realizing anti-vibration in all frequency bands of a variable frequency motor. Background technique [0002] At present, the development of domestic frequency conversion motors is generally based on the structure of 50Hz power frequency motors, strengthening insulation, adjusting temperature rise, and lack of research methods for vibration reduction design in the full frequency range of motors, resulting in the risk of out-of-tolerance or high vibration in the working frequency range of frequency conversion motors. [0003] For the vibration assessment of non-variable frequency motors, only the vibration value at the rated frequency operating point is measured, that is, the vibration value at 50Hz. Depending on the structure of the motor, the motor may have a large vibration point during the starting process, which is allowed in the structural design. For example, see Figure 1a , the time and vibration velocity m...

AI Technical Summary

Problems solved by technology

For example, see Figure 1a , the measurement curve of time and vibration velocity during the starting process of a high-voltage asynchronous motor, although it has a peak value of 4mm / s, as long as the rated operating point avoids this value, the result of the vibration assessment may be far lower than the 1.8mm / s standard

Images