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Debugging a digital controller for power converters can be a lengthy process due to the long time required in mixed-signal simulations. This paper focuses on the design of a power converter model for debugging digital controllers in closed loop. The testing may be performed by means of simulation or emulation. This paper shows the results of simulating and emulating the power converter using different...
PFC controllers usually need three sensors. A digital implementation with pre-calculated duty cycles can reduce the number of sensors. The disadvantage of using pre-calculated duty cycles is that power factor is very sensitive to any non-idealities, so some kind of regulation is necessary. A single ADC and single loop technique is proposed and it obtains a high power factor under non-nominal conditions.
In recent years, Finite Control Set Model Predictive Control (FCS-MPC) has received considerable attention due to advantages such as ease of implementation, flexibility in the definition of control objectives and superior transient performance. However, some drawbacks of FCS-MPC, such as variable switching frequency and steady-state error, have also been reported. In order to assess the performance...
This paper introduces a novel power management architecture for battery powered portable applications, where ac-dc power adapters are used to charge the battery. The flyback-based system allows independent regulation of output bus voltage, irrespective of adapter output, and battery cell voltages. This architecture creates the flexibility to use a wide range of adapters to power the device while charging...
This paper describes a novel way to implement soft switching in DC/DC converters for high current low voltage applications in the automotive field. Adding resonant elements to a bidirectional buck boost converter enables resonant behaviour. In simulation and laboratory it will be shown that this behaviour reduces the switch-off losses strongly.
The Soft Switching Three Level Inverter — abbreviated to S3L Inverter — was first introduced in 2011. It is a novel circuit topology for PWM inverters, whose areas of application include electrical drives and grid-tie inverters for photovoltaic installations and wind power plants, and for power supplies. It is of very simple design and therefore inexpensive. It is implemented completely as soft switching...
The emergence of silicon carbide MOSFETs and Schottky Barrier Diodes (SBD) at higher voltage and current ratings is opening up new possibilities in the design of energy dense power converters. One of the main advantages of these wide bandgap unipolar devices is the use of fast switching to enable the size reduction of passive components. However, packaging constraints like parasitic inductances limit...
In this paper the main advantages of 6.5 kV Reverse Conducting IGBTs (RC-IGBTs) compared to state-of-the-art two-chip IGBT/Diode solutions for traction applications are discussed. The experimental results show the potential of RC-IGBTs as well as the increased requirements on the gate control strategy.
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