Abstract
Abstract According to the producing mechanism of the harmonic current, the equivalent circuit of harmonic current for the high speed motorized spindle (HSMS) is established. Meanwhile, the formulas of oscillation harmonic torque, fluctuating speed and motor loss are developed on the basis of the superposition principle, which can be used as the foundation for the analysis of the harmonic current effects on the dynamic behaviors of the HSMS. Finally, the harmonic interference test is carried out on a 170MD15Y20 type spindle with different rotational speeds to validate the theoretical model. The results indicate that the motor loss generated by harmonic components can not be ignored. When the speed decreases, the harmonic current effects on the dynamic behaviors of HSMS increases, which indicates that the ripple amplitudes of output torque and speed rise, and the motor efficiency declines, thus the scope of the spindle speed is limited.
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