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A closed form solution is presented for the transient and steady-state response of surface permanent magnet synchronous machines to single FET short circuit failure in the drive. PWM techniques such as sine and discontinuous switching schemes are compared with respect to the motor performance under such fault condition. With the help of the analytic model the sensitivity of the key control parameters...
In this paper, a new arrangement of seven-level Stepped DC Link Inverter (SDCLI) is proposed. It consists of DC link modules and H-bridge inverter. Compared with Two-Level Inverter (TLI), the SDCLI system generates the output voltage with reduced harmonic content and voltage stress. SDCLI can considerably reduce the switch count as well as gate drivers as the number of voltage levels increases. The...
Simulation times of electric circuits containing switching power supplies not only depend on the algorithms used for solving the network equations but also on the choice of the time-step-control strategy. While generic simulation packages use the estimated truncation error to find the optimum time step, in this work a more specialized approach was followed. After studying the analytic solution and...
DC-DC converters form an essential component of modern low-power integrated circuits. This paper presents a novel nonlinear modeling technique for pulse-width modulated (PWM) DC-DC converters for low-power applications. Our enhanced model not only predicts the dc response, but also captures harmonics of arbitrary degrees. The proposed full-order model retains the inductor current as a state variable...
Multilevel inverters are best suitable for high power applications as they provide quality output waveform with less amount of voltage and current stresses on the switching elements which ensure good quality performance, among the various topologies of multilevel inverter cascaded H-Bridge is more reliable, simple in design and can be implemented easily and has better performance compared to other...
Real-time (RT) simulation is increasingly used in power electronics and power engineering as a tool to replace actual hardware for use in the development and verification of control and complex system designs. New computing architectures and algorithms, such as parallel and distributed computing, hold the promise to meet the speed requirement of such RT simulation. Due to its inherent parallelism...
This paper addresses the common mode (CM) electromagnetic noise issues in two switch forward converter. The two switch forward converter has low common mode noise compared to other topologies because its symmetric primary side circuit has two out of phase dv/dts that cancel each other. However parasitic capacitances of the circuit significantly affect the symmetry and degrade the noise reduction....
The main contain of this article specifically for audio directional system is hit by digital power amplifier, and to the rear for digital power amplifier stage full-bridge circuit simulation test. It proposes the question of the full-bridge circuit which you must pay attention to in the design process, and the article brings forward the method that improves specifically for these problems. The audio...
For FPGA-based three level switching power amplifier, this paper completed full-bridge circuit model and the current sampling circuit model was created by using Power System Blockset (PSB) library in the MATALB/Simulink. Through embedded MATLAB function file, we simulated the internal FPGA data processing. Simulation and experimental results verified the correctness of this method of modeling. And...
Model-based predictive current control scheme proposed in the paper is a constant frequency unipolar PWM control algorithm that achieves a symmetrical zero-centered current error in every switching cycle. This method is intended to choose the suitable switching instants based on assumed values for the circuit model parameters rather than the real-time measurement of the actual parameters, no feedback...
The technique of averaged modeling represents a DC-DC switched converter by a continuous-time model for quantities averaged over the switching period. The paper presents a universal procedure for symbolic analysis of converters using the generalized model of PWM switch. Both line-to-output and control-to-output small-signal responses can be obtained in symbolic form. Example analyses using the symbolic...
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