Four-Quadrant Switch PDF
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Uploaded by VictoriousLogic5708
Isabela State University
Bumata, Christopher
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Summary
This document discusses four-quadrant switches, their components, operation and applications in electrical engineering, particularly in areas of H-bridge DC machine control, power inverters, and battery chargers. The text covers the different types of switches and their functionalities, including diodes and transistors, as well as a detailed overview of the four quadrants of operation.
Full Transcript
BUMATAY, CRISTOPHER M., JR. SECTION: BSEE 3B SUBJECT: EE 314 Chapter 2: Topic 4: Four Quadrant Switch Definition: A switch that can operate in all four quadrants of the voltage-current plane. The most general type of switch is the four quadrant switch , capable...
BUMATAY, CRISTOPHER M., JR. SECTION: BSEE 3B SUBJECT: EE 314 Chapter 2: Topic 4: Four Quadrant Switch Definition: A switch that can operate in all four quadrants of the voltage-current plane. The most general type of switch is the four quadrant switch , capable of conducting currents of either polarity and blocking voltages of either polarity, as in figure 4.19. There are several ways of constructing a four quadrant switch. As illustrated in figure 4.20(b). two current-bidirectional two-quadrant switches described in section 4.1.2 can be connected back to back. The transistors are driven on and off simultaneously. Another approach is the antiparallel connection of two voltage-bidirectional two quadrant switches described in section 4.1.3, as in figure 4.20(a). A third approach, using only one transistor but additional diodes, is given in fig 4.20(c). Some types of switches Diodes Single Quadrant Switch Can conduct positive on-state current Can block negative off-state voltage Transistors (BJTs and IGBTs) Single Quadrant Switch Can conduct positive on-state current Can block positive off-state voltage Quadrants overview: Quadrant 1: Positive voltage, Positive current ( Forward Active). Quadrant 2: Negative Voltage, Positive current ( Forward Blocking). Quadrant 3: Negative Voltage, Negative current (Reverse Active). Quadrant 4: Positive Voltage, Negative current (Reverse Blocking). Applications: H bridge DC machine Control Power Inverters Battery Charges Advantages: Flexibility in controlling power flow. Ability to handle bidirectional power. Enhanced efficiency in energy conversion. Disadvantages: Complexity: can make them harder to design, implement, and troubleshoot. Cost: more expensive compared to simpler switching device. Size: it require more space.
