(inverting): Voltage between pin 4 and ground = Voltage between pin 11 and ground = Table 1 IV. A. 3. Record DMM measurements for the following voltages with respect to ground: Node Voltages Theoretical Values Measured Values VA 1 VDC VB 1 VDC VC 1 VDC Table 2 IV. A. 4. Calculated and measured values of VOUT: VOUT (calculated) = VOUT (measured) = VOUT-MEASURED – VOUT-CALCULATED = Table 3 IV. A. 5. Record DMM measurements for the following voltages with respect to ground: Node Voltages Theoretical
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a high crossover frequency of the voltage loop by adding low-pass filter‚ so that a low distortion of the input current is easily achieved. This controller has been verified via simulation in Simulink using a continuous time plant model and a discrete time controller. Index Terms—power‚ factor‚ correction‚ boost‚ rectifier. I. INTRODUCTION. Single-phase power factor correction (PFC) circuits provide rectification of the line voltage to a regulated dc voltage while shaping the input current to
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An Improved Control Strategy for DFIG System and Dynamic Voltage Restorer under Grid Voltage Dip Peng Cheng‚ Heng Nian‚ Member‚ IEEE College of Electrical Engineering‚ Zhejiang University‚ Hangzhou‚ China cheng_peng@zju.edu.cn Abstract：With the increasing percentage of wind power in the utility grid‚ grid codes require that wind turbines must have low voltage ride through (LVRT) capability. Considering that doubly fed induction generation (DFIG) systems have the tolerance capability ‚ to
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Reduced DC-Link Voltage Rating for Load Compensation With Nonstiff Source Srinivas Bhaskar Karanki‚ Nagesh Geddada‚ Student Member‚ IEEE‚ Mahesh K. Mishra‚ Senior Member‚ IEEE‚ and B. Kalyan Kumar‚ Member‚ IEEE Abstract—The distribution static compensator (DSTATCOM) is used for load compensation in power distribution network. In this paper‚ a new topology for DSTATCOM applications with nonstiff source is proposed. The proposed topology enables DSTATCOM to have a reduced dc-link voltage without compromising
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equal to the magnitude of ?VEE. These voltages are measured with respect to ground. To make a differential amplifier‚ the two circuits are connected as shown in fig. 1. The two +VCC and ?VEE supply terminals are made common because they are same. The two emitters are also connected and the parallel combination of RE1 and RE2 is replaced by a resistance RE. The two input signals v1 & v2 are applied at the base of Q1 and at the base of Q2. The output voltage is taken between two collectors. The
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Our major result is to obtain a graph of output voltage-load current characteristic at 700 rpm which is 50% rated speed for all the generators. From the results‚ we analyze the characteristics of each type of generator. The separately excited‚ is driven at constant speed and has a fixed field current‚ the output voltage will decrease with increased load current. Moreover for series wound generator‚ the external characteristic curve shows‚ the voltage output starts at current equal to zero and increase
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1ϕ and 3ϕ Transformer for Open-Circuit and Short-Circuit testAbstract Transformer is a static devices that changes Ac electric power at one voltage level into AC electric power at another voltage level through the action of a magnetic field. It consists of two or more coils of wire wrapped around a common ferromagnetic core. These coils are not directly connected usually. The only connection between the coils is the common magnetic flux present within the core. One of the transformer windings is
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Circuits 4. Voltage Multiplier Circuits 5. Signal Mixers 6. Switches 7. Tuning Let us examine each of these applications with some considerable detail. RECTIFICATION: The process of converting AC into DC is called rectification. Diodes can be used as half wave rectifiers and full wave rectifiers. Half Wave Rectifier: Circuit Diagram: . In the Half wave rectifier circuit shown above the transformer serves two purposes. 1. It can be used to obtain the desired level of dc voltage (using step
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issue that is becoming increasingly important to electricity consumers at all levels of usage. Sensitive power electronic equipment and non-linear loads are widely used in industrial‚ commercial and domestic applications leading to distortion in voltage and current waveforms. With ongoing regulatory‚ policy and structural changes in the Indian electricity industry‚ following the Electricity Act 2003‚ the issue of power quality is poised to become a figure-of-merit amongst the competing distribution
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Differential amplifiers A differential (or difference) amplifier is a circuit used for amplifying a voltage difference between two input signals while rejecting signals that are common to both inputs. IRE = based on approximation IC ≈ IE then IC1 = IC2 = IRE/2 therefore‚ VC1 = VC2 = VCC – IC1R1 Modes of Signal Operation: Single-ended input – input signal is applied to either input with the other input connected to ground Differential or double-ended input – two opposite polarity input signals are
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