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 22:20:52This Valentine's Day brand marketing handbook provides businesses with five practical models, covering everything from creating offline experiences to driving online engagement. Whether you're a shopping mall, restaurant, or online brand, you'll find a suitable strategy: each model includes clear objectives and industry-specific guidelines, helping brands transform traffic into real sales and lasting emotional connections during this romantic season.
This Valentine's Day map illustrates love through 30 romantic possibilities, from the vintage charm of "handwritten love letters" to the urban landscape of "rooftop sunsets," from the tactile experience of a "pottery workshop" to the leisurely moments of "wine tasting at a vineyard"—offering a unique sense of occasion for every couple. Whether it's cozy, experiential, or luxurious, love always finds the most fitting expression. May you all find the perfect atmosphere for your love story.
The ice hockey schedule for the Milano Cortina 2026 Winter Olympics, featuring preliminary rounds, quarterfinals, and medal matches for both men's and women's tournaments from February 5–22. All game times are listed in Eastern Standard Time (EST).
This Valentine's Day brand marketing handbook provides businesses with five practical models, covering everything from creating offline experiences to driving online engagement. Whether you're a shopping mall, restaurant, or online brand, you'll find a suitable strategy: each model includes clear objectives and industry-specific guidelines, helping brands transform traffic into real sales and lasting emotional connections during this romantic season.
This Valentine's Day map illustrates love through 30 romantic possibilities, from the vintage charm of "handwritten love letters" to the urban landscape of "rooftop sunsets," from the tactile experience of a "pottery workshop" to the leisurely moments of "wine tasting at a vineyard"—offering a unique sense of occasion for every couple. Whether it's cozy, experiential, or luxurious, love always finds the most fitting expression. May you all find the perfect atmosphere for your love story.
The ice hockey schedule for the Milano Cortina 2026 Winter Olympics, featuring preliminary rounds, quarterfinals, and medal matches for both men's and women's tournaments from February 5–22. All game times are listed in Eastern Standard Time (EST).
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:
913863b5051f4a8c005ce44504ec402
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