＜正＞On the basis of the traditional mechanical model of a grinding wheel rotor and the mechanical-electric coupling model with ideal sinusoidal supply,taking high-frequency converting current of inverter power switches into further consideration,a modified mechanical-electric coupling model is created.The created model consists of an inverter,a motorized spindle,a grinding wheel and grinding loads.Some typical non-stationary processes of the grinding system with two different supplies,including the starting,the speed rising and the break in grinding loads,are compared by making use of the created model.One supply is an ideal sinusoida]voltage source,the other is an inverter.The theoretical analysis of the high-order harmonic is also compared with the experimental result.The material strategy of suppressing high-order harmonic mechanical-electric coupling vibration by optimizing inverter operating parameters is proposed.
展开▼
