According to the control strategy of ac motors, the two control means put forward to be applicable to electric vehicle about VVVF and space vector.
依据交流电机的控制策略，提出了适用于电动汽车交流电动机控制的变频变压调速和矢量控制两种控制的实现方法。
In AC-DC-AC VVVF, We can accurately measure voltage, current, power and frequency with The HIOKI3164 and TOPVIEW31 analysis software, even if the wave is irregularities and distortion.
利用HIOKI3164和TOPVIEW31分析软件，可对交-直-交变频器中电压、电流、功率、频率进行准确测量，不论它是不规则波形还是畸变波形。
The energy-saving effect and rough calculation of AC VVVF inverter in ventilator load in practical industrical production were described.
论述了交流变频调速器在工业企业实际生产中用于通风机类负载时节能效果情况及节能费用图示估算方法。
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