In this article we will discuss about:- 1. Introduction to Power Factor 2. Causes of Low Power Factor 3. Disadvantages. Introduction to Power Factor: The cosine of the angle between voltage and current in an ac circuit is known as power factor. In an ac circuit, there is generally a phase difference between voltage and current. In an inductive circuit, [...]
In this article we will discuss about:- 1. Methods of Power Factor Improvement 2. Advantages of Power Factor Improvement 3. Economics 4. Economical Comparison of the Two Methods of Increasing the Power Supplied. Methods of Power Factor Improvement: The low power factor is almost invariably due to inductive nature of load and, therefore, the logical corrective is to connect such [...]
Consider an ac circuit containing resistance of R ohms, inductance of L henries and capacitance of C farads connected in series, as shown in Fig. 4.23 (a). Let the current flowing through the circuit be of I amperes and supply frequency be f Hz. Voltage drop across resistance, VR = IR in phase with I Voltage drop across inductance, VL= [...]
In this article we will discuss about:- 1. Introduction to Single Phase AC Circuit 2. Purely Resistive Circuit 3. Purely Inductive Circuit 4. Purely Capacitive Circuit 5. Resistance — Capacitance (R-C) Series Circuit 6. Apparent Power, True Power, Reactive Power and Power Factor. Contents: Introduction to Single Phase AC Circuit Purely Resistive Circuit Purely Inductive Circuit Purely Capacitive Circuit Resistance [...]
Resistance-Inductance (R-L) series circuit is the case most generally met with in practice; nearly all circuits contain both resistance and inductance. Consider an ac circuit consisting of resistance of R ohms and inductance of L henrys connected in series, as shown in Fig. 4.5 (a). Let the supply frequency be f and current flowing through the circuit be of I [...]
Parallel ac circuits can be solved by the following methods: 1. Phasor method 2. Admittance method. The application of a particular method will depend upon the conditions of the problem. However, in general, that method should be used which gives quick results. 1. Phasor Method: Consider a parallel circuit consisting of three branches of impedances Z1 (R1, L1, C1), Z2, [...]