Ca3130 Unit 1 Case Study

A phase-locked loop (PLL) generates a signal that has a fixed relation to the phase of a reference signal and is given in Fig. 4. A phase locked loop responds to both the frequency and the phase of the input signals, automatically raising or lowering the frequency of the controlled oscillator until it is matched to the reference in both frequency and phase. Here three phase PLL was implemented with three basic functional blocks: the phase detector, a PI controller and a voltage controlled oscillator. The phase detector is a circuit capable of delivering an output signal that is proportional to the phase difference between its two input signals. The PI controller is a low pass filter and used to suppress high frequency component and provide dc controlled signal to voltage controlled oscillator which acts as an integrator. The output of the PI controller is the inverter output frequency that is integrated to obtain inverter phase angle θ. When the difference between grid phase angle and inverter phase angle is equal, Vq =

Technology changes will significantly reshape IT companies like CA Technologies. CA has kept its mainframe and clients’ server business in the past 30 years. The company provides the latest mainframe innovations. But CA has to face a new challenge whether it continuous to keep major business in mainframe or make a thorough transformation from mainframe to cloud computing.

Because of its linear characteristics and ease of controlling it's speed by simple power electronic circuit. The main obstacle for this type of system which has prompted the researchers to focus their studies toward AC machine, such as induction and synchronous machine. The availability of the variable speed drives for induction motor made it dominated in industry. Despite this, the small efficiency in induction motor especially those which have low power rating. The PMBDCM with predominant performance is found to be the solution for the drawbacks of the AC and Induction motors. The characteristics of the PMBDCM is similar to the separately excited DC motor, the difference in controller of PMBDCM which is the same of AC motor controller [2] [6].

Now a days, the switching power supply market is flourishing quickly. The trend is for DC-AC converters with low cost, higher efficiency, power saving that enable maximum features. In this project, a single-stage three-switch buck-boost inverter is designed, where stepping up, stepping down and inversion operation will takes place in single stage. This proposed inverter will overcome all the drawbacks of traditional one. Coupled inductor plays a very important role in energy transfer and eliminates the use of line frequency transformer. As the inverter having only three switches, the controlling of switches also easier than conventional one. And it has also advantages like compact design, reduced switching losses, component size, and cost.

Chapter 2 is covered by literature review. It is an overview about UWB technologies as it stated it’s the benefits of UWB in terms of its characteristics features and applications. This chapter is also concern about the concepts of CMOS technology. Fundamentals of power amplifier are also included in Chapter 2 such as the specification of the power amplifier performance, the linear and switching mode classes, and the its topology,. Not to mention the previous works related to CMOS power amplifier for UWB applications are at the last part of the chapter.

Single loop control methods allowed a single voltage control loop to regulate the output voltage. The input current shaping is accomplished in an open loop manner, the duty cycle patterns are predefined by considering in ideal PFC operation. One example in this control method is the duty phase control (DPC) proposed by Chen [42]. In this method, a phase shift is willingly introduced to the stored duty cycle patterns. The output voltage is regulated by adjusting this phase shift by using the output of the voltage error amplifier, which is named “the duty phase”. This approach simplified the control structure and eliminated the current loop, without the need to

Identify and analysis of technical features and design criteria of the possible re-active power compensation (RPC) equipments.

According to equation (14), the eight switching vectors, output line to neutral voltage (phase voltage), and output line-to-line voltages in terms of input DC voltage Vdc, are given in Table1

The CA3140A and CA3140 are integrated circuit operational amplifiers that combine the advantages of high voltage PMOS transistors with high voltage bipolar transistors on a single monolithic chip. The CA3140A and CA3140 BiMOS operational amplifiers feature gate protected MOSFET (PMOS) transistors in the input circuit to provide very high input impedance, very low input current, and high speed performance. The CA3140A and CA3140 operate at supply voltage from 4V to 36V (either single or dual supply). These operational amplifiers are internally phase compensated to achieve stable operation in unity gain follower

Large scale cascaded photovoltaic systems is contributing renewable energy world wide due to its unique features like reliability, power quality ,amount of energy harvested and so on. However cascaded PV system is facing one of the tough challenges like reactive power control due to varied power distribution over different PV modules. This paper addresses the issue of effects due to reactive power on system reliability ,power quality and reactive power compensation strategy for optimal operation of system. A photovoltaic system consisting of three 5W, 10V solar modules with converters are used and proposed control strategy is implemented in laboratory. experimental results are presented to demonstrate the effectiveness of proposed reactive power control strategy.

The power factor correction and load balancing simulation results for the proposed AANF-based control algorithm of the four-leg DSTATCOM under unbalanced distorted supply voltages is discussed here. At t= 0.4 s, phase ‘A’ and at t= 0.5s phase ‘B’ are disconnected, respectively, and at t= 0.7 s and t= 0.8 s phases ‘A’ and ‘B’ are applied again. Fig.

Abstract—SA-ADCs are widely used in low-power applications. Three architectures of the capacitor array Digital-Analog Converter (DAC) used in SA-ADC that are mentioned in this paper are binary-weighted DAC, unary-weighted DAC and segmented DAC. In this paper comparator is been designed for all these SA-ADC architectures. The comparator used in SA-ADC plays an important role. The main purpose of the comparator is to compare a signal with a reference signal and produce an output depending on whether the input signal is greater or smaller than the reference signal. The structure of the comparator does not depend on the segmentation degree (i.e. the number of unary bits), for all the binary, segmented, and unary structures, the same circuit configuration with similar power consumption can be employed.

1.1 Converter type selection . . . . . . . . . . . . . . .

Key words – i) Effect of series resistance ii) i-v characterstics iii) Power region iv) Power Plane Analysis v)Maximum Power Point Tracking.

This project has been carried out at the department of the electrical engineering at S.V.I.T. Vasad. It has been great opportunity to work with this project and get knowledge about this area of the power electronics.