So in this case when a dc supply applies to it, the regulated DC voltage will switch the frequency oscillator ic and the MOSFET 's will function the push-pull amplification. This will use a transformer to produce the required power output. Therefore we can get a normal inverter DC/AC output. To make this output a pure sine wave, there is a filter circuit fixed at the output the AC terminal. Therefore it will filter the unnecessary frequencies, harmonics and will produce a constant pure sine wave.
The rotor, instead of being spun around its central axis is rather pulled along the stator by a moving magnetic field. Similarly, the linear induction motor of the EMALS  consists of two 100m parallel stators with a rotor built from permanent magnets moving between the stators. The stators are built from sections and only the section next to the rotor is energized at a given moment, reducing power consumption. Furthermore, Hall Effect sensors provide real-time feedback of the rotor velocity and thus the velocity profile during launch can be closely matched to that required of the launching
The actual power of the wind turbine depends on the efficiency of the turbine represented by Cp (λ, β) which is the function of the tip speed ratio (λ) and pitch angle (β). The tip speed ratio (λ) is defined to be the ratio between the turbine speed and the wind speed, and is given by (λ) =wR/v where is the turbine angular speed, and R is the radius of the turbine. Therefore, the actual power captured by the wind turbine is given by P =1/2Cp(λ, β)ρAv3 Then, the torque of the wind turbine could be expressed as T = P ω The electrical power is given by: Pe = η.P Figure 3.2 shows the Cp - λ characteristics for the different values of β. From the figure, we may observe that for a fixed pitch angle, a maximum Cp is achieved when the tip speed ratio is at the optimal value (λopt). Recall Eq.
4 Derivation of thin airfoil theory The airfoil is modeled as a thin lifting mean-line (camber line). The mean-line, y(x), is considered to produce a distribution of vorticity (s) along the line, s. By the Kutta condition, the vorticity is zero at the trailing edge. Since the airfoil is thin, x (chord position) can be used instead of s, and all angles can be approximated as small. From the Biot–Savart law, this vorticity produces a flow field w(x) where Where x is the location where induced velocity is produced, x′ is the location of the vortex element producing the velocity and c is the chord length of the airfoil. Since there is no flow normal to the curved surface of the airfoil, w(x) balances that from the component of main flow V , which is locally normal to the plate – the main flow is locally inclined to the plate by an angle α-dy/dx.
Figure 1,1 shows the force acting on the cross-sectional area of the wing during this motion. The concept for this motion is similar to the propeller blade on an aircraft when the downward motion of the wing is considered to be similar to the rotating motion of the blade and the propeller torque force that must be overcome by the motion is the lift force produced on the
The consultant from LPCSL have ensures that the selected data collection methods are in connection with the chosen research designs of the project. Primary and secondary data collection will be used for this study and hopefully this would enable LPCSL to recommend CWOA on its marketing communication strategy. 3.3.1 Secondary data LPCSL will explore the literature developed by previous researchers to gather secondary data as it is the most effective way of doing so and thus enabling the researcher to improve her knowledge and understanding of the main interest topic. LPCSL will go through external sources, collecting information outside the organisation. The consultant will examine and evaluate the following theoretical literature written by: • Michael E. Porter • Philip Kotler • Christine Daymon • Immy Holloway LPCSL has conducted research on topics relevant to the project such as: brand positioning, organisational culture, shift of mission and vision, redesigning core values, competitive advantage, and marketing communication models.