A method and/or apparatus for altering command voltages when a modulation index is greater than unity in order to maintain the linear relationship between the fundamental component of phase voltage and the command voltage in PWM inverter... V Kaura - US 被引量: 36发表: 1997年 New Time-Domain...
(1) Bipolar sinusoidal pulse width modulation (2) Unipolar sinusoidal pulse width modulation For SPWM, the modulation index is defined as ma=VcontrolVtri Similarly, The frequency modulation ratio (mf) is given as follows: mf=ftrifcontrol where ftri and fcontrol are the frequencies of the carr...
17.5) go unused for amplitude modulation indices less than 0.6 in a six-level inverter. Figure 17.19b shows how only the middle switches (Sa3−Sa′3 in Fig. 17.5) change states when a six-level inverter is operated at an amplitude modulation index less than 0.2. The output waveform in...
A precise fear memory encoding a traumatic event enables an individual to avoid danger and identify safety. An impaired fear memory (contextual amnesia), however, puts the individual at risk of developing posttraumatic stress disorder (PTSD) due to the i
(right). The sign of VIP score shows whether the change in variable correlated negatively or positively with the treatment-induced response. Only VIP scores of greater than 1 or smaller than −1 with a statistically significant Pearson’s correlation (P < 0.05) are highlighted.dTwo-sided...
utilized low-layer porous graphene as the electrode, as shown in Figure 4A, which greatly improved the modulator’s transmittance and achieved phase modulation greater than 180° above 0.9 THz and greater than 360° above 1.8 THz [63]. Li et al. utilized PEDOT:PSS thin layers to achieve a...
The method involves transmitting DC current over at least one conductor at a level which can exceed each such conductor's nominal thermally-limited current-carrying capacity, returning the transmitted current over a quantity of conductors greater than the quantity used to transmit at the higher level...
1 Index position indicates the role of the corresponding microbial reaction (EC number) in the Microbial Protein Metabolism Index (MPMI). MPMI is calculated as the ratio of the total normalized gene abundance of Numerator reactions (N) to the total normalized gene abundance of Denominator reactions...
If swine were not able to maintain MAP greater than 65 mmHg despite interventions, the study was terminated. A neurological exam was performed every 30 min while on ECPR and if signs of life were observed, a propofol dose of 1–12 mg/kg/hr was administered intravenously for sedation. Data...
μb(n,fm,b)=23⋅1+cos2πfm,bfsn+φb⋅λb(n). (3) Here,nis the sample index,fsis the sampling rate,fm,bis themodulation frequencyin subbandb, and λbis a band-limited stationary signal with a constant envelope over time (which can in some cases only be approximated, but is ...