by National Aeronautics and Space Administration, Lewis Research Center in [Cleveland, Ohio?] .
Written in English
|Statement||by F.C. Lee.|
|Series||NASA-CR -- 173557., NASA contractor report -- NASA CR-173557.|
|Contributions||Lewis Research Center., Virginia Polytechnic Institute and State University. College of Engineering.|
|The Physical Object|
Get this from a library! Input filter compensation for switching regulators: final report. [S S Kelkar; F C Lee; Lewis Research Center.; Virginia Polytechnic . A novel input-filter compensation scheme is proposed which uses feedforward loops to cancel the effects of peaking of the output impedance of the input filter, such that the converter is immune from performance degradation due to loop gain : S. S. Kelkar, F. C. Lee. Problems caused by input filter interaction and conventional input filter design techniques are discussed. The concept of feedforward control is modeled with an input filter and a buck regulator. Experimental measurement and comparison to the analytical predictions is carried out. Transient response and the use of a feedforward loop to stabilize the regulator system is by: 1. A novel input filter compensation scheme for a buck regulator that eliminates the interaction between the input filter output impedance and the regulator control loop is presented. The scheme is implemented using a feedforward loop that senses the input filter state variables and uses this information to modulate the duty cycle signal.
Input filter compensation for switching regulators: Authors: Lee, F. C The input filter design is made more complicated because of the need to avoid performance degradation and also stay within the weight and loss limitations. thus forming a total state control scheme. The design of the feedforward loop for a buck regulator is described. ALGORITHMS IN SWITCHING REGULATORS Abstract: In this application note, we’ll examine three basic control algorithms for switching regulators. We’ll discuss pros and cons of each and provide guidance on the right loop compensation strategy to obtain a fast and stable Size: KB. Design Process for an RC Second Stage Output Filter. Step 1: Choose C 1 based on assuming the value output ripple at C 1 is approximately ignoring the rest of the filter; 5 mV p-p to 20 mV p-p is a good place to start. C 1 can then be calculated using Equation . The input filter on a switching power supply has two primary functions. One is to prevent electromagnetic interference, generated by the switching source from reaching the power line and affecting other Size: KB.
Abstract—For a three-phase buck-type pulsewidth modulation rectifier input stage of a high-power telecommunications power supply module, a differential-mode (DM) electromagnetic com-patibility (EMC) filter is designed for compliance to CISPR 22 Class B in the frequency range of kHz–30 MHz. • is the original transfer function before addition of input filter. (12) is the output impedance of the LC filter, looking from DC-DC side. is the converter input impedance, with set to zero. is the converter input impedance, with the output nulled to Size: KB. Fundamentals of Power Electronics 9 Chapter Input Filter Design. The Input Filter Design Problem. A typical design approach: 1. Engineer designs switching regulator that meets specifications (stability, transient response, output impedance, etc.).File Size: KB. The interaction between the input filter and the control loop of switching regulators often results in detrimental effects, such as loop instability, transient response, and audio-signal-rejection.