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Power electronics applications have become ubiquitous among electronic products today. As a consequence, a great increase on the demand of professionals by the industry has been observed. This has a direct consequence on the electrical and electronics engineering curricula, as they have to meet the requirements of an industry with an increasing number of products requiring power electronics solutions...
The power chain of a cable car has to meet special requirements concerning grid coupling and drive concept: On the grid side very low short-circuit power is available and on the drive side the bearable torque ripple is very low. Due to the long cable connections, the use of very line friendly line-side converter topologies and control concepts is a must. The minimization of the torque ripple is the...
This paper endeavors to present a comprehensive summary of the causes and effects of three-phase unbalance and discusses the energy efficiency in the balance condition and the unbalance condition. To correct the unbalance problems, a new topology structure of SVC is proposed. The energy efficiency is analyzed by an actual experiment with the compensation of the new SVC. And the experimental result...
In this paper, two control strategies for three-phase series-parallel uninterruptible power supplies are compared. A series-parallel UPS consists of a parallel and a series converter. In this topology, most power required by load is supplied directly from AC line during standby mode. Therefore the overall efficiency is higher than that of a conventional UPS. Traditionally, the control strategy of...
This paper proposes an input-paralleled output-paralleled half-bridge converter based on single half-bridge converter, which is very suitable for the low output voltage and large output current application. All modules share a common capacitor-leg, that can reduce the number of main circuitpsilas capacitors and make topology simple. The traits and rules of combination converter are introduced and...
This paper mainly discusses several methods on widening the speed-regulating range of rare earth permanent magnet brushless direct current motor (BLDCM). The simulation of traditional three-phase inverter structure and the three-phase bridge based on Buck chopper is analysis on the speed-regulating range. The calculation formulas of inductance and capacitance in Buck chopper are given. DSP is designed...
A new configuration of a soft-switching power converter using phase-to-phase commutation is proposed. The topology of the phase-to-phase commutated inverter (PPCI) is derived from the auxiliary resonant commutated pole inverter. A control strategy is suggested and the principle of the PPCI operations is discussed. PPCI ensures switching at zero voltage across the working power transistors and zero...
A fourth order step-down power converter is treated as an example of how to survey a given circuit to decide whether a given topology is interesting for realization. An idealized power converter model is then established in which continuous operation mode and ideal devices are assumed.<<ETX>>
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