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As this voltage and current was very low it resulted in a low power value which then had the contradiction of resulting in a low fill factor. The maximum power value was found to be quite large

In order to optimize the power delivered to the load to increase the efficiency of the secondary circuit, Rs must be diminished to as low of a value as possible. Likewise, in order to optimize the amount of power being delivered to the secondary circuit through coupling, the primary circuit must increase the amount of power from the source, as well as decrease the resistance in the primary coil itself. The quality factor of the secondary coil is inversely related to the secondary resistance, Rs. The system described is shown in Figure

The equivalent electrical circuit of a dc motor is shown in figure 5.2. It can be represented by a voltage source (Va) across the coil of the armature. The electrical equivalent of the armature coil can be described by an inductance (La) in series with a resistance (Ra) in series with an induced voltage (Vc) which

converted into synchronous reference frame using the park transformation [12]. The open loop plant model

It is observed that the power factor is maintained closer to unity when the input voltage is reduced from 230V to 110Vrms. Figure 11 (a) and (b) shows the power factor correction of controller for various load condition such as 20% (60W) and 75% (230W). The power factor for the system is found to be 0.84 for light load condition and 0.99 for full load condition. The THD of input current at full load with predominant third and fifth harmonic components are shown in Figure 12(a) and (b).Third harmonics is found to be 4.8% and fifth harmonic component is 4.9% which are well within IEC 61000-3-2 standard during wide range of load variations. The variation in power factor with load is shown graphically in Figure 13(a). It can be inferred from the graph that improved resettable control operates at high power factor for all load condition whereas the conventional PI control has poor power factor under light load conditions. Figure 13(b) shows the comparison between the efficiency of the converter for varying load conditions with the conventional control method and the resettable integrator control. The converter’s efficiency is maintained at 92% for light load conditions and 96% for fully loaded condition with integrator control technique. Thus the improved resettable integrator controller provides a very simple and reliable solution for power factor correction and

Authors often borrow from one another, sometimes heavily. Though rooted in very different communities, Sia Figiel and Toni Morrison manage to craft similar narratives that explore what it means live in small, often poor communities. For Morrison, this means experimenting to find a voice that is black—drifting through narrators to find a position that might see the entirety of The Bluest Eye. Figiel, on the other hand, chooses to tell her story in Where ‘We’ Once Belonged by exploring a series of disjointed scenes, mostly from the perspective of her implied narrator, Alofa. By comparing the supporting characters from these two novels, we can draw Morrison’s influence out of Figiel’s novel and examine how Figiel utilizes similar archetypes in

Fig. 5.6. Adding the current limiter to the VSI control: (a) grid voltages, grid currents; and (b) dc-link voltage under an SLG-voltage sag at MV side of the transformer.

Wind turbine electrical model WT3E should have ωPmin < ωP20 < ωP40 < ωP60 < ωP100.

The stator is designed with segment rectangular copper winding to maximize output power within its limited dimensions. In the design process, the closed slot opening and slot-pole combination are investigated and compared in terms of efficiency and input current density.

Using Field Oriented Control, current control is largely unaffected by speed of rotation of the motor[6].In the scheme of filed oriented control motor currents and voltages obtained from the motor are transformed into d-q reference frame. Measured currents from three stator phases these currents which are now in the stator reference frame are converted into two phase using Clarke transformations which are further converted into the corresponding rotor reference frame using Park transformation. The resultant current obtained is dc which is easier for the PI controllers to operate.

Deal, 2010, ‘Wind Power: An Emerging Energy Resource’, Technology and Engineering Teacher, pp. 9-15, viewed on September 12, 2011, retrieved from: http://search.proquest.com/docview/853062621/fulltextPDF/13255EC175479D10C7A/1?accountid=42518

Power electronics: The major functions of the power electronics are, use of control of the torque generation within the motor while driving and also the control of energy delivery back within the battery pack while charging. The owners were able to charge the vehicle through any power source. A standard, 12 amp/110 volt wall outlet was able to charge the vehicle to its full capacity.

“When you switch on the car, the current is passed from the battery. The controller takes power from the battery and passes it on to the electric motor. Before passing the current to motor, the controller converts the 300V DC into a maximum of 240 volts AC, 2 phase power which is suitable for motor. The electric motor then converts electrical energy to mechanical energy” (How).

This paper proposes an algebraic and a graphical method for finding all the performance extreme values of a three-phase induction machine when it operates as a motor or a generator. The performance extreme include maximum efficiency, maximum power factor, maximum electric power, maximum torque and maximum mechanical power in both motoring and generating modes. In addition to the algebraic method, this paper shows how an old graphical method can be used to accurately find the performance extreme values

Index Terms – Unified Power Quality Conditioner, Active Power Filter, hysteresis control, voltage and current unbalance.