This chapter introduces various capacitors used in three‐phase AC converters, the capacitor selection problem relevant to converter and converter subsystem design, and the capacitor
This chapter introduces various capacitors used in three‐phase AC converters, the capacitor selection problem relevant to converter and converter subsystem design, and the capacitor characteristics and models needed for the capacitor selection. It covers the types of capacitors that are widely available today, describing the materials used
The current switching ripple in a three-phase four-wire split-capacitor converter is analyzed in this paper for all the four ac output wires in relation to both balanced and unbalanced working conditions. Specifically, analytical formulations of the peak-to-peak and root mean square (RMS) current ripples are originally evaluated as a
In this paper, the impedances of three-phase four-wire split capacitor inverter and three-phase four-leg inverter are established. Based on the achieved impedance, the similarities and...
A Split Phase Induction Motor is a single phase motor consists of a stator and a single-cage rotor. The stator has two windings i.e. main winding and an auxiliary winding. The auxiliary winding is also known as starting winding. In construction, these two windings are placed 90° apart in space. The Split Phase Induction Motor is shown in figure 1.
In this paper, the impedances of three-phase four-wire split capacitor inverter and three-phase four-leg inverter are established. Based on the achieved impedance, the similarities and...
Abstract: This study proposes an ac–ac direct static power converter based on the switched-capacitor (SC) principle, aimed at supplying a split-phase system from an ac single-phase voltage source.
The split capacitors also enable single-phase operation with phase shedding by only deactivating two of the three phase legs without any special control strategies. This paper discusses a practically optimal value of the split ratio from both theoretical and simulation analysis, and presents phase shedding operation and structure of the
The study sets a baseline for split DC link capacitance values and voltage set points in three-phase three-level AC/DC (or DC/AC) converters operating with unity power factor. In order to equalize the average values of
Fig. 3. Three-level FC-SSI inductor charging and discharging states considering one phase x, where x stands for phase a, b, or c and the load conditions are neglected: (a) L is charging; (b) L is discharging in Cx ; and (c) L and Cx are
The study sets a baseline for split DC link capacitance values and voltage set points in three-phase three-level AC/DC (or DC/AC) converters operating with unity power factor. In order to equalize the average values of partial DC link voltages, the controller generates a zero-sequence containing DC components only while employing
The three-phase four-wire inverter with split dc-link capacitors can supply unbalanced loads. For the purpose of reducing the filter inductors, a neutral inductor could be introduced into the neutral line. This paper analyzes the operation principle of the three-phase four-wire inverter with split dc-link capacitors when a neutral inductor is introduced. It is illustrated that the neutral
Abstract: This paper proposes a three-phase LLC resonant converter capable of both current balancing and phase shedding. The topology splits the resonant capacitor into two in each resonant tank. One is connected to the power supply line, while the other is connected with those in the other resonant tanks. Appropriate selection of the split
The split capacitors also enable single-phase operation with phase shedding by only deactivating two of the three phase legs without any special control strategies. This paper discusses a
This paper proposes a three-phase LLC resonant converter capable of both current balancing and phase shedding. The topology splits the resonant capacitor into two in each resonant tank. One is connected to the power supply line, while the other is connected with those in the other resonant tanks. Appropriate selection of the split ratio naturally achieves current balancing even with
Download scientific diagram | Three-phase four-wire shunt APFs: (a) Split-capacitor; (b) Four-leg; and (c) Three F-Bridge. from publication: Synchronous reference frame based controllers applied
Abstract: This study proposes an ac–ac direct static power converter based on the switched-capacitor (SC) principle, aimed at supplying a split-phase system from an ac single-phase
The split-phase capacitor units provide an economical double star (Y-Y) unbalance detection scheme using only three units, compared with conventional designs using six units. The capacitor unit has three bushings consisting of one common terminal and two capacitor output terminals. The capacitors consist of thin dielectric polypropylene film wound together with electrodes of
A permanent split capacitor (PSC) motor is a type of single-phase AC motor; more specifically, a type of split-phase induction motor in which the capacitor is permanently connected (as opposed to only being connected when starting).
The current switching ripple in a three-phase four-wire split-capacitor converter is analyzed in this paper for all the four ac output wires in relation to both balanced and unbalanced working conditions. Specifically, analytical formulations of the peak-to-peak and root mean square (RMS) current ripples are originally evaluated as a function of the modulation
Abstract: The split-capacitor midpoint-clamped three-phase four-leg (3P4L) inverter is capable of sustaining stable output with three-phase symmetrical voltages under both
Three-phase, four-wire split capacitor inverters are currently employed in many applications, such as photovoltaic systems, battery chargers for electric...
The current switching ripple in a three-phase four-wire split-capacitor converter is analyzed in this paper for all the four ac output wires in relation to both balanced and unbalanced working conditions. Specifically,
Three-phase, four-wire split capacitor inverters are currently employed in many applications, such as photovoltaic systems, battery chargers for electric...
The paper presented comprehensive modeling and formulation of split DC link capacitors balancing problem in three-phase three-level bidirectional AC/DC converters operating with arbitrary power factor. Analytical relation between partial DC link voltages difference dynamics and zero-sequence component of modulation signals as
Abstract: This paper proposes a three-phase LLC resonant converter capable of both current balancing and phase shedding. The topology splits the resonant capacitor into two in each
Abstract: The split-capacitor midpoint-clamped three-phase four-leg (3P4L) inverter is capable of sustaining stable output with three-phase symmetrical voltages under both balanced/unbalanced and linear/non-linear loads.
The paper presented comprehensive modeling and formulation of split DC link capacitors balancing problem in three-phase three-level bidirectional AC/DC converters operating with arbitrary power factor. Analytical relation between partial DC link voltages difference
Abstract— In this paper, a new three-phase power-factor correc-tion (PFC) scheme is proposed using two single-phase PFC mod-ules. In this approach, the "three" phase input is first transformed to "two" phase by means of a 0.14-pu-rated autotransformer. Two standard single-phase PFC modules are then employed to process
Download Citation | On Oct 11, 2020, Akiteru Chiba and others published Current Balancing and Phase Shedding by Split Capacitor for a Three-Phase LLC Resonant Converter | Find, read and cite all
Three-phase split-capacitor converter normalized RMS numerical data points (green squares/diamonds, “ sim ”) and analytical profiles (solid lines) of the neutral current ripple as a function of the modulation index mx in case of single and three interleaved (“*”) carriers.
Appropriate selection of the split ratio naturally achieves current balancing even with parameter variation in the resonant components. The split capacitors also enable single-phase operation with phase shedding by only deactivating two of the three phase legs without any special control strategies.
This paper proposes a three-phase LLC resonant converter capable of both current balancing and phase shedding. The topology splits the resonant capacitor into t
Nevertheless, considering the four-wire split-capacitor inverter, the normalized maximum peak-to-peak value of the phase current ripple occurs at ϑ x = π/2, and it is always constant (equal to 0.5) and independent from the modulation index.
The topology splits the resonant capacitor into two in each resonant tank. One is connected to the power supply line, while the other is connected with those in the other resonant tanks. Appropriate selection of the split ratio naturally achieves current balancing even with parameter variation in the resonant components.
Lagrangian dynamics is applied to theoretically prove that it is possible to replace the three-discrete transformers by a single integrated transformer, and reveals that in a symmetrical design, there is no interphase coupling, and as a result the magnetic components can be downsized owing to the ac flux cancellation.
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