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Single Quadrant Chopper Fed DC Drive ppt
- 1. GOVERNMENT ENGINEERING COLLEGE, VALSAD ELECTRICALDRIVES SINGLE QUADRANT CHOPPER FED DC DRIVE Presented by Enrollment No. Name 220190109003 Ayush Singh 220190109004 Kanojiya Ritesh C. 220190109008 Mangela Vaishvik V. 220190109009 Mangela Parthiv D. Department: Electrical, Semester:6th (2024-25)
- 2. BASIC CIRCUIT DIAGRAM: Here, Vs = DC supply. Chopper is switching device (we can also use MOSFET, IGBT, SCR or thyristor). Free wheeling (FD) provides a path for motor current during the chopper off time. Here, load is DC motor which can be separately excited or series motor. Both current and voltage are always positive (unidirectional operation).
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- 4. Duty cycle insingle quadrant chopper fed DC drive: where: •TO N = Time for which the chopper switch is ON •TO F F = Time for which the chopper switch is OFF •TO N +TO F F = Total switching period The output voltage (V0 ) is the average voltage applied across the motor: V0 =δVs
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- 7. ADVANTAGES: • DC chopperdrive have high efficiency. • Compact and lightweight. • Fast response and fast switching frequency. • Smooth and precise speed control by varying the duty cycle. • Since it operates in motoring mode, regenerative components are not required.
- 8. DISADVANTAGES: • Limited toone quadrant operation. • High-frequency switching generates harmonics which can interfere with nearby electronic devices. • The output voltage and current ripples, requiring additional filtering. • Uses semiconductor devices like IGBTs and MOSFETs, which are costlier than resistive controllers.
- 9. APPLICATIONS: • To controlthe speed of DC motors. • Industrial conveyor belt drives. • Fans, blowers, and pumps requiring variable speed control. • Robotic arm movement in one direction. • Traction systems. • Rolling mills.
- 10. CONCLUSION: The Single QuadrantChopper Fed DC Drive is a fundamental power electronic converter used to control DC motors. We studied its operation, simulink modeling and application.
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