Electrical Circuit Design｜Basic
Basic Alternating Current (AC)
2022.04.15
Alternating Current (AC) is an electric current and voltage that change their magnitude and direction periodically over time. The advantage of AC over Direct Current (DC) lies in its higher efficiency and lower energy loss over long-distance transmission. AC is a form of electrical energy that is widely used in daily life, from household power to industrial electricity. The key points to understand about AC include sine waveforms, frequency, phase difference, effective value, and the impacts of resistance, inductance, and capacitance in AC circuits (including electrical impedance and resonant circuit). These provide the fundamental knowledge necessary for the efficient and safe use of electricity. The following is a detailed article that delves deeply into the principles of AC, from the basics to applications in AC circuits.
- ・AC Circuits: Alternating Current, Waveforms, and Formulas
- ・Complex Numbers in AC Circuit
- ・Electrical Reactance
- ・What is Impedance? AC Circuit Analysis and Design
- ・Impedance Measurement: How to Choose Methods and Improve Accuracy
- ・Impedance Matching: Why It Matters for Power Transfer and Signal Reflections
- ・Resonant Circuits: Resonant Frequency and Q Factor
- ・RLC Circuit: Series and Parallel, Applied circuits
- ・What is AC Power? Active Power, Reactive Power, Apparent Power
- ・Power Factor: Calculation and Efficiency Improvement
- ・What is PFC?
- ・Boundary Current Mode (BCM) PFC: Examples of Efficiency Improvement Using Diodes
- ・Continuous Current Mode (CCM) PFC: Examples of Efficiency Improvement Using Diode
- ・LED Illumination Circuits：Example of Efficiency Improvement and Noise Reduction Using MOSFETs
- ・PFC Circuits for Air Conditioners：Example of Efficiency Improvement Using MOSFETs and Diodes
【Download Documents】 AC Circuit Fundamentals
This handbook summarizes key AC circuit concepts from each article, including reactance, impedance, resonance, power, and power factor. It outlines derivations and circuit behavior, highlighting essential ideas for circuit design.
Electrical Circuit Design
Basic
- Soldering Techniques and Solder Types
- Seven Tools for Soldering
- Seven Techniques for Printed Circuit Board Reworking
-
Basic Alternating Current (AC)
- AC Circuits: Alternating Current, Waveforms, and Formulas
- Complex Numbers in AC Circuit
- Electrical Reactance
- What is Impedance? AC Circuit Analysis and Design
- Impedance Measurement: How to Choose Methods and Improve Accuracy
- Impedance Matching: Why It Matters for Power Transfer and Signal Reflections
- Resonant Circuits: Resonant Frequency and Q Factor
- RLC Circuit: Series and Parallel, Applied circuits
- What is AC Power? Active Power, Reactive Power, Apparent Power
- Power Factor: Calculation and Efficiency Improvement
- What is PFC?
- Boundary Current Mode (BCM) PFC: Examples of Efficiency Improvement Using Diodes
- Continuous Current Mode (CCM) PFC: Examples of Efficiency Improvement Using Diode
- LED Illumination Circuits：Example of Efficiency Improvement and Noise Reduction Using MOSFETs
- PFC Circuits for Air Conditioners：Example of Efficiency Improvement Using MOSFETs and Diodes
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Basic Direct Current (DC)
- Ohm’s Law: Voltage, Current, and Resistance
- Electric Current and Voltage in DC Circuits
- Kirchhoff’s Circuit Laws
- What Is Mesh Analysis (Mesh Current Method)?
- What Is Nodal Analysis (Nodal Voltage Analysis)?
- Thevenin’s Theorem: DC Circuit Analysis
- Norton’s Theorem: Equivalent Circuit Analysis
- What Is the Superposition Theorem?
- What Is the Δ–Y Transformation (Y–Δ Transformation)?
- Voltage Divider Circuit
- Current Divider and the Current Divider Rule