Electrical basics

01 Physical phenomena and circuit models in circuits, basic physical quantities in circuits

02 Resistance, capacitance, inductance components and characteristics

03 Digital multimeter to measure resistance

04 Independent power supply in the circuit, Kirchhoff's law

05 Kirchhoff's law micro course

06 Circuit Summary of the basic concepts and laws of circuits, exercise lesson (1)

07 Summary of the basic concepts and laws of circuits, exercise lesson (2)

08 Series and parallel equivalent transformation of resistors; star-angle transformation of resistors; equivalent transformation of power supply

09 Power supply The

equivalent transformation

of ​ ​ ​1) 16 Phasor representation of sinusoidal quantity (2), phasor form of basic circuit laws 17 Impedance and admittance 18 Phasor method solution of sinusoidal AC circuit 19 Power and calculation, power factor and improvement of sinusoidal AC circuit 20 Resonant circuit 21 Mutual inductance circuit (1) 22 Mutual inductance circuit (2) 23 Calculation of ideal transformer and circuit 24 Three-phase power supply and three-phase load 25 Calculation of three-phase power 26 Calculation of symmetrical three-phase circuit 27 Characteristics and analysis of asymmetrical three-phase circuit 28 Harmonic analysis of non-sinusoidal signals, harmonic analysis of non-sinusoidal signals effective value, average value, average power 29 Analysis of non-sinusoidal periodic current circuits 30 Dynamic process and dynamic response of the circuit 31 Determination of the initial conditions of the circuit 32 Solving the first order Three-element method of circuit dynamic response 33 Classification of first-order circuit response 34 Step response of first-order circuit 35 Laplace transform and its basic properties 36 Partial fraction expansion method of inverse Laplace transform 37 Complexity of linear circuits Frequency domain method to solve 38 Equations and parameters of two-port network (1) 39 Equations and parameters of two-port network (2) 40 Equivalent circuit of two-port network, cascade of two-port network 41 Nonlinear resistor components and their characteristics, Graphical method of nonlinear circuit 42 Small signal analysis method of nonlinear resistor circuit 43 Application of superposition theorem 44 Thevenin's theorem - determination of equivalent parameters of active two-terminal network 45 Simulation application: DC circuit analysis 46 Improvement of power factor 47 AC Mutual inductance in circuits 48 Measurement of three-phase circuits

• Chapter 1：Physical phenomena and circuit models in circuits, basic physical quantities in circuits (53 minutes and 53 seconds)

• Chapter 2：Resistors, capacitors, and inductors components and characteristics (49 minutes and 0 seconds)

• Chapter 3：Digital multimeter measuring resistance (6 minutes and 7 seconds)

• Chapter 4：Independent power sources in circuits, Kirchhoff's laws (49 minutes and 4 seconds)

• Chapter 5：Kirchhoff's Law (5 minutes and 26 seconds)

• Chapter 6：Summary of basic concepts and laws of circuits and exercises (1) (35 minutes and 45 seconds)

• Chapter 7：Summary of basic concepts and laws of circuits and exercises (2) (31 minutes and 26 seconds)

• Chapter 8：Series and parallel equivalent transformation of resistors; star-angle transformation of resistors; equivalent transformation of power supply (48 minutes and 36 seconds)

• Chapter 9：Equivalent transformation of power supply (6 minutes and 43 seconds)

• Chapter 10：Controlled sources and their equivalent transformations, superposition theorem and substitution theorem (44 minutes and 38 seconds)

• Chapter 11：Thevenin's Theorem and Norton's Theorem (43 minutes and 50 seconds)

• Chapter 12：branch current method (13 minutes and 38 seconds)

• Chapter 13：mesh analysis (30 minutes and 25 seconds)

• Chapter 14：node analysis method (44 minutes and 0 seconds)

• Chapter 15：Sine quantity and phasor representation of sinusoidal quantity (1) (43 minutes and 13 seconds)

• Chapter 16：Phasor representation of sinusoidal quantities (2), phasor form of basic circuit laws (45 minutes and 3 seconds)

• Chapter 17：Impedance and Admittance (43 minutes and 43 seconds)

• Chapter 18：Phasor method solution for sinusoidal AC circuit (50 minutes and 19 seconds)

• Chapter 19：Power and calculation of sinusoidal AC circuit, power factor and improvement (47 minutes and 18 seconds)

• Chapter 20：Resonant circuit (44 minutes and 36 seconds)

• Chapter 21：Mutual inductance circuit (1) (50 minutes and 16 seconds)

• Chapter 22：Mutual inductance circuit (2) (42 minutes and 23 seconds)

• Chapter 23：Calculation of ideal transformers and circuits (29 minutes and 37 seconds)

• Chapter 24：Three-phase power supply and three-phase load (49 minutes and 1 seconds)

• Chapter 25：Calculation of three-phase power (51 minutes and 34 seconds)

• Chapter 26：Calculation of symmetrical three-phase circuits (37 minutes and 8 seconds)

• Chapter 27：Characteristics and analysis of asymmetric three-phase circuits (49 minutes and 38 seconds)

• Chapter 28：Harmonic analysis of non-sinusoidal signals, harmonic analysis of non-sinusoidal signals RMS, average value, average power (46 minutes and 53 seconds)

• Chapter 29：Analysis of non-sinusoidal periodic current circuits (41 minutes and 27 seconds)

• Chapter 30：Dynamic process and dynamic response of circuits (30 minutes and 26 seconds)

• Chapter 31：Determination of circuit initial conditions (44 minutes and 24 seconds)

• Chapter 32：Three-element method for solving the dynamic response of first-order circuits (44 minutes and 29 seconds)

• Chapter 33：Classification of first-order circuit responses (48 minutes and 4 seconds)

• Chapter 34：Step response of a first-order circuit (35 minutes and 33 seconds)

• Chapter 35：Laplace transform and its basic properties (35 minutes and 56 seconds)

• Chapter 36：Partial fraction expansion method of inverse Laplace transform (35 minutes and 29 seconds)

• Chapter 37：Complex Frequency Domain Method for Solving Linear Circuits (46 minutes and 22 seconds)

• Chapter 38：Equations and parameters of two-port network (1) (55 minutes and 18 seconds)

• Chapter 39：Equations and parameters of two-port network (2) (31 minutes and 46 seconds)

• Chapter 40：Equivalent circuit of two-port network, cascade of two-port network (44 minutes and 59 seconds)

• Chapter 41：Nonlinear resistor elements and their characteristics, diagrammatic method of nonlinear circuits (26 minutes and 55 seconds)

• Chapter 42：Small signal analysis method of nonlinear resistor circuit (21 minutes and 16 seconds)

• Chapter 43：Application of the superposition theorem (28 minutes and 41 seconds)

• Chapter 44：Thevenin's Theorem - Determination of Equivalent Parameters of Active Two-Terminal Networks (28 minutes and 7 seconds)

• Chapter 45：Simulation Application: DC Circuit Analysis (32 minutes and 46 seconds)

• Chapter 46：Improvement of power factor (43 minutes and 33 seconds)

• Chapter 47：Mutual inductance in AC circuits (25 minutes and 4 seconds)

• Chapter 48：Measurement of three-phase circuits (41 minutes and 56 seconds)