Alternating current variable frequency control method suitable for vibration ageing

Abstract

The invention discloses an alternating current variable frequency control method suitable for vibration ageing, which is characterized in that a lower computer sets a function baud table according to a sine function y=A (sinx + ksinNx, N=1, 2, 3,...), thus the alternating current signal of a driving power module of the lower computer contains a higher harmonic wave; when an upper computer sends a rotating speed instruction to the lower computer, the lower computer sequentially calls points in an array to output a sine wave; and the alternating current signal output by a control power module is a driving square wave of the power module output by automatically searching the function baud table by the lower computer through a register shifting method. By changing the operational method of the lower computer, the invention improves the stabilized rotating speed of a single chip microcomputer (SCM) so that the SCM saves a large amount of resources for operating sine functions, thereby improving the CPU processing speed, greatly improving the stabilized speed, inhibiting the influence of the self-induced higher harmonic wave on bus output, making up the switching delay and the dead loss of the power module, effectively improving the driving capability of the power module and meeting the requirements of the vibration ageing process.

Description

technical field [0001] The invention relates to a frequency conversion control method used in vibration aging of an AC motor. Background technique [0002] Vibrating Stress Relief (VSR for short) aims to resonate the processed workpiece through professional vibration aging equipment, and transmit a certain amount of vibration energy to all parts of the workpiece through this resonance method, so that the inside of the workpiece Microscopic plastic deformation--the distorted lattice gradually returns to the equilibrium state, and the dislocations slide and pin again, so that the residual stress inside the workpiece can be eliminated and homogenized, and finally prevent the workpiece from deforming and cracking during processing and use , to ensure the stability of the dimensional accuracy of the workpiece. [0003] The traditional vibration aging is to use the rotation of the DC brush permanent magnet motor to drive the eccentric block of the exciter fixed on the workpiece t...

AI Technical Summary

Problems solved by technology

It cannot be used for steady speed during vibration aging, and is far from the V / F control mode

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