The varying characteristics of motor current in vari-speed cutting are discussed in this paper.

本文就变速切削过程中电机电流的变化特征进行了较为系统的研究。

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The significant factors which exert an influence on instantaneous fluctuation of motor current are in sequence :Vari-speed wave form, vari-speed amplitude and vari-speed frequency.

在变速参数中影响电机瞬时电流波动最为显著的因素依次为变速波形、变速幅度和变速频率。

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The theoretical analysis and experimental results demonstrate that the motor current has some fluctuation in vari-speed cutting process, but it is almost no effect on normal operation of machine tool.

理论分析和试验结果表明，采用变速切削加工时，电机瞬时电流确有一定程度的波动，但不影响机床电机的正常使用；

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The VGA-resolution 3.2-inch display was incredibly sharp and bright, and the vari-angle functionality lets you snap overhead and below-eye-level shots with ease.

ENGADGET: Hands-on with Nikon's Coolpix P520 and L820 superzooms at CP+ (video)

The Nikon D5200's versatile 7.5cm (3-in) vari-angle LCD monitor provides the ultimate freedom and flexibility to take beautiful shots and movies from virtually any position.

ENGADGET: Nikon reveals D5200 SLR with D7000-taunting specs: 24MP sensor, 39-point AF, wireless port (hands-on)

Additionally, the COOLPIX P520 allows users to not only shoot images from a distance, but also at unique angles thanks to a versatile 3.2-inch Vari-Angle LCD monitor.

ENGADGET: Nikon updates Coolpix compact lineup with S9500, sub-$200 S5200 and L28