Design and Implement of Voltage Ripple Measuring System for Power Supply of Microwave Tubes

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Ahmadi Someh, Saeed | 2017

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 49512 (46)
University: Sharif University of Technology
Department: Energy Engineering
Advisor(s): Kaboli, Shahryar
Abstract:
Mostly, the high voltage DC power supplies have output voltage ripple. In such an applications like power supply of microwave lamps in radar systems, low output voltage ripple is an important point of operational characteristics. On the other hand, measuring the low voltage ripple will be a challenge that can lead to recognize of its reasons and reduce its amplitude. In this thesis, different ways of ripple measurement constraints is described, then a method based on high pass filters for output voltage ripple measurement is implemented. The impact of components tolerance and their parasitic components like shunt parasitic resistance of a capacitor in filter operational characteristics is studied. The intended method is implemented on two section power supply of radar. The target is to get the most possible amount of ripple for increasing the signal to noise ratio and deploying that in control loop of chosen power supply. Under consideration of constraints and circuit stability, some conditions for appropriate filter and power supply bandwidth is determined. Finally, the practical results in low DC voltages is implemented with consideration of no change in circuit general operation in comparison to high voltage
Keywords:
Measurement ; Power Supply ; High Voltage DC Power Supply ; Voltage Ripple

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