a Pole voltage waveforms (VA20 and VA40) for modulation index 0.4 (middle trace is A-phase voltage waveform) x-axis: 1 div.=10ms, y-axis: 1 div.= 100V b Normalized harmonic spectrum for pole voltage of Fig. 9a c A-pha...a Pole voltage waveforms (VA20 and VA40) for modulation index 0.4 (middle trace is A-phase voltage waveform) x-axis: 1 div.=10ms, y-axis: 1 div.= 100V b Normalized harmonic spectrum for pole voltage of Fig. 9a c A-phase current and phase voltage for modulation index 0.4 (reference space vector is in inner layer)展开更多
China will continue to implement its proactive fiscal policy in 2011 and better handle the relations between maintaining steady and relatively fast economic development, restructuring the
The multiplicity of vector combinations for vectors of combined three-level inverters plays an important role, when deciding on the modulation scheme, to obtain minimum switching per inverter vector change, as describ...The multiplicity of vector combinations for vectors of combined three-level inverters plays an important role, when deciding on the modulation scheme, to obtain minimum switching per inverter vector change, as described in the next Section. This is not possible with reduced common-mode three-level inverter structure, obtained with a five-level cascaded H-bridge configuration, as the space vectors locations do not exhibit multiplicity. Moreover, the proposed configuration requires only two power supplies, whereas the scheme with the five-level H-bridge configuration requires six isolated power supplies.展开更多
The latest monthly prosperity index of the nonferrous metal industry at ce.cn shows that in June 2017,the prosperity index of the nonferrous metal industry was 28.5,down by1.8 from the previous month into the'cold...The latest monthly prosperity index of the nonferrous metal industry at ce.cn shows that in June 2017,the prosperity index of the nonferrous metal industry was 28.5,down by1.8 from the previous month into the'cold'zone;the leading index was 87.3,down by 1.7from the previous month;the coincident index was 80.0,down by 2.0 from the previous month.Preliminary judgment is that the industry downturn is mainly affected by展开更多
文摘a Pole voltage waveforms (VA20 and VA40) for modulation index 0.4 (middle trace is A-phase voltage waveform) x-axis: 1 div.=10ms, y-axis: 1 div.= 100V b Normalized harmonic spectrum for pole voltage of Fig. 9a c A-phase current and phase voltage for modulation index 0.4 (reference space vector is in inner layer)
文摘China will continue to implement its proactive fiscal policy in 2011 and better handle the relations between maintaining steady and relatively fast economic development, restructuring the
文摘The multiplicity of vector combinations for vectors of combined three-level inverters plays an important role, when deciding on the modulation scheme, to obtain minimum switching per inverter vector change, as described in the next Section. This is not possible with reduced common-mode three-level inverter structure, obtained with a five-level cascaded H-bridge configuration, as the space vectors locations do not exhibit multiplicity. Moreover, the proposed configuration requires only two power supplies, whereas the scheme with the five-level H-bridge configuration requires six isolated power supplies.
文摘The latest monthly prosperity index of the nonferrous metal industry at ce.cn shows that in June 2017,the prosperity index of the nonferrous metal industry was 28.5,down by1.8 from the previous month into the'cold'zone;the leading index was 87.3,down by 1.7from the previous month;the coincident index was 80.0,down by 2.0 from the previous month.Preliminary judgment is that the industry downturn is mainly affected by
