Encyclopedia of Energy: Ec-GeElsevier, 2004 - Power (Mechanics) |
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Page 191
... sinusoidal waveforms ( i.e. , not distorted by harmonics ) , the power factor is equal to the cosine of the phase angle between the voltage and current waves in an AC circuit . This value is known as the " displacement " power factor ...
... sinusoidal waveforms ( i.e. , not distorted by harmonics ) , the power factor is equal to the cosine of the phase angle between the voltage and current waves in an AC circuit . This value is known as the " displacement " power factor ...
Page 200
i ( t ) v ( t ) FIGURE 13 Illustration of a sinusoidal pulse - width modula- tion technique . Line side AC / DC converter DC link Motor side DC / AC converter Three - phase AC supply AC motor FIGURE 14 Power circuitry of a voltage ...
i ( t ) v ( t ) FIGURE 13 Illustration of a sinusoidal pulse - width modula- tion technique . Line side AC / DC converter DC link Motor side DC / AC converter Three - phase AC supply AC motor FIGURE 14 Power circuitry of a voltage ...
Page 247
... sinusoidal voltages ( and currents ) are equal in magnitude but differ in phase angle of 120 ° from each other . The voltages shown in Fig . 2 have three phases . By convention , the a phase is usually taken as the reference voltage ...
... sinusoidal voltages ( and currents ) are equal in magnitude but differ in phase angle of 120 ° from each other . The voltages shown in Fig . 2 have three phases . By convention , the a phase is usually taken as the reference voltage ...
Contents
Contents of Volumes | 1 |
Fuel | 5 |
Turbines Gas Wind Energy Technology Environmental Impacts | 7 |
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activity analysis areas assessment biomass capital cascading failures chemical coal combustion components consumers consumption cost countries depletion ecological footprint ecological risk assessment economic growth ecosystem health effects embodied energy Emergy Evaluation emissions endpoints energy demand energy efficiency energy intensity energy prices energy resources energy services energy supply entropy environment environmental regulation equipment ESCO estimate evaluation example exposure external extraction factors fossil fuels function future global gross domestic product heat household human impacts important income increase industry inputs investment Kuznets curve labor land load magnetic field market failures materials measure ment motor natural gas nonrenewable nuclear NYMEX operating optimal organisms output petroleum physical pollution potential power plants production ratio reduce renewable reserves result sector solar sources specific structure studies theory thermodynamics tion transformation transmission typically United utility variables voltage