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Switched-Mode Power Supplies
Published in Vinod Kumar, Ranjan Kumar Behera, Dheeraj Joshi, Ramesh Bansal, Power Electronics, Drives, and Advanced Applications, 2020
Vinod Kumar, Ranjan Kumar Behera, Dheeraj Joshi, Ramesh Bansal
Traditionally, linear power supplies have been used, but advancement in semiconductor technology has led to switching power supplies, which are smaller in size and lighter in weight with improved efficiency as compared to linear power supplies. The behavior of the linear power supply is identical to the switching power supply when viewed as a black box with input and output terminals. The basic difference is that a continuous load current is regulated by the linear supply to maintain constant load voltage, whereas the switching power supply regulates the constant current flow by chopping the input voltage and the duty cycle.
Introduction to Mechatronic Systems
Published in Bogdan M. Wilamowski, J. David Irwin, Control and Mechatronics, 2018
A power supply unit is a device or system that supplies electrical or any other type of energy to loads, such as lamp, controller, motor, and so on. The term is most commonly applied to electrical energy supplies, less often to mechanical ones, and rarely to others. Power supply is capable of converting one form of electrical power to another desired form and voltage, typically involving the conversion of AC line voltage into a well-regulated lower-voltage DC for electronic devices. Low-voltage, low-power DC supply units are commonly integrated with the devices to which they supply power.
Power Amplifiers and Switches
Published in Nassir H. Sabah, Electronics, 2017
Power conversion efficiency is the ratio of the power delivered at signal frequency to the power supplied by the dc power supply. Not only is high power-conversion efficiency desirable, but also low power dissipation in the absence of the signal.
Design and Analysis of Hysteresis Feedback Controlled dc Power Supply for Solid State Power Amplifier
Published in IETE Journal of Research, 2022
Rohit Agarwal, Rajesh Kumar, Gajendra Suthar, Hrushikesh Dalicha
In a regulated power supply, the controller regulates the dc output voltage. The conventional controller is based on Pulse Width Modulation (PWM) where the switching frequency is fixed and duty cycle is varied to regulate the output voltage [5]. This scheme works in a continuous conduction mode [6]. There will be a possibility for power supply during low duty cycle and low load condition to enter in a discontinuous conduction mode. It is undesirable since it makes the controller to behave unexpectedly. To avoid this, a large inductor is required which makes the system bulky and less efficient. To allow the operation independent of the continuous or discontinuous mode, hysteresis feedback control is explored. Desired voltage ripple with good load regulation and good line regulation can be obtained in the entire load matrix. It can be achieved without compromising the dynamic response of the power supply. This control scheme has general implication and can be used with different voltage/power ratings.
Application of inverse heat conduction calculation method for fast-transient flow boiling heat transfer analysis
Published in Journal of Nuclear Science and Technology, 2022
Yong-Seok Choi, Jong-Kuk Park, Byong Guk Jeon, Dong Hoon Kam, Sang-Ki Moon
A direct-current power supply was used to generate a pulsed power. The power supply has 450 kW capacity with a maximum voltage and current of about 75 volts and 6,000 amperes, respectively. Its power control circuit units were designed to produce a step-wise pulse power. The pulse width can be set from 20 milliseconds to 1.25 seconds, and the pulse power is adjustable within the power supply capacity.