MindMap Gallery sinusoidal ac circuit
Mind map of a sinusoidal AC circuit. A circuit that contains sinusoidal current and the voltage and current generated by each part of the circuit changes at a sinusoidal rate is called a sinusoidal AC circuit.
Edited at 2023-06-09 22:20:52One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
Project management is the process of applying specialized knowledge, skills, tools, and methods to project activities so that the project can achieve or exceed the set needs and expectations within the constraints of limited resources. This diagram provides a comprehensive overview of the 8 components of the project management process and can be used as a generic template for direct application.
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
Project management is the process of applying specialized knowledge, skills, tools, and methods to project activities so that the project can achieve or exceed the set needs and expectations within the constraints of limited resources. This diagram provides a comprehensive overview of the 8 components of the project management process and can be used as a generic template for direct application.
sinusoidal ac circuit
basic concept
Concept: A circuit that contains sinusoidal current and the voltage and current generated by each part of the circuit changes according to a sinusoidal rate is called a sinusoidal AC circuit.
Three elements: amplitude, angular frequency, initial phase angle
Excitation and response: Each response produced by a sinusoidal AC circuit under excitation is a sinusoidal quantity with the same frequency as the excitation. Therefore, to find a sinusoidal quantity, you only need to find the amplitude and initial phase. When the timing starting points of two sinusoidal quantities with the same frequency change, their initial phase angles change, but the difference in initial phase angles remains unchanged.
sine quantity representation
Trigonometric functions:
Waveform graph:
Phasor representation: Represent sinusoidal quantities as complex numbers
Cartesian coordinates
triangle pose
exponential
polar coordinates
Operation rules:
The operation form of phasor analysis method:
Single parameter sinusoidal AC circuit
Concept: refers to a circuit composed of resistors, inductors, and capacitors.
Analysis: In a circuit generally composed of resistors, inductors, capacitors, etc., under the excitation of the AC power supply, the relationship between voltage and current and the conversion of energy in the circuit occur.
Resistor, inductor, capacitor comparison:
RLC series circuit
voltage current relationship
It can be known from KVL
impedance:
Impedance mode:
electrical properties confirmed
power
Series-parallel and vector analysis methods of impedance
The analysis of AC circuits must use the vector analysis method: Problem-solving ideas: follow the analysis method of DC circuits, but the expression must be in phasor form
Phasor form: phasor formula OR phasor diagram
1. Master Ohm’s, KVL, and KCL laws in vector form
2. Pay attention to the phasor operation rules and the representation form
3. Pay attention to grasp the phase relationship between u and i of a single parameter
Choice of reference quantity
1. Series circuits often use current as the reference quantity, and the voltage of each component is related to the current.
2. Parallel circuits often use voltage as the reference quantity, and the current of each component is related to the voltage.
Improvement of power factor
definition:
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Problems caused by low power factor
1. The capacity of the power supply equipment will not be fully utilized
2. Increase power losses in transmission lines and generator windings
Method to improve power factor: inductive load in parallel with electrostatic capacitance